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Author SHA1 Message Date
Andrew Burgess
2e362716fc gdb: convert some function arguments from int to bool 
A little int to bool conversion around the 'watch' type commands.
There should be no user visible changes after this commit.

gdb/ChangeLog:

	* breakpoint.c (update_watchpoint): Pass 'false' not '0'.
	(watch_command_1): Update parameter types.  Convert locals to
	bool.
	(watch_command_wrapper): Change parameter type.
	(watch_maybe_just_location): Change locals to bool.
	(rwatch_command_wrapper): Update parameter type.
	(awatch_command_wrapper): Update parameter type.
	* breakpoint.h (watch_command_wrapper): Change parameter type.
	(rwatch_command_wrapper): Update parameter type.
	(awatch_command_wrapper): Update parameter type.
	* eval.c (fetch_subexp_value): Change parameter type.
	* ppc-linux-nat.c (ppc_linux_nat_target::check_condition): Pass
	'false' not '0'.
	* value.h (fetch_subexp_value): Change parameter type in
	declaration.
 2020-11-19 10:15:02 +00:00
Tom Tromey
baf20f7627 Make internalvar_name return a const char * 
This changes internalvar_name to return a const char *.

gdb/ChangeLog
2020-11-10  Tom Tromey  <tom@tromey.com>

	* value.h (internalvar_name): Update.
	* value.c (internalvar_name): Make return type const.
 2020-11-10 15:46:19 -07:00
Simon Marchi
dda83cd783 gdb, gdbserver, gdbsupport: fix leading space vs tabs issues 
Many spots incorrectly use only spaces for indentation (for example,
there are a lot of spots in ada-lang.c).  I've always found it awkward
when I needed to edit one of these spots: do I keep the original wrong
indentation, or do I fix it?  What if the lines around it are also
wrong, do I fix them too?  I probably don't want to fix them in the same
patch, to avoid adding noise to my patch.

So I propose to fix as much as possible once and for all (hopefully).

One typical counter argument for this is that it makes code archeology
more difficult, because git-blame will show this commit as the last
change for these lines.  My counter counter argument is: when
git-blaming, you often need to do "blame the file at the parent commit"
anyway, to go past some other refactor that touched the line you are
interested in, but is not the change you are looking for.  So you
already need a somewhat efficient way to do this.

Using some interactive tool, rather than plain git-blame, makes this
trivial.  For example, I use "tig blame <file>", where going back past
the commit that changed the currently selected line is one keystroke.
It looks like Magit in Emacs does it too (though I've never used it).
Web viewers of Github and Gitlab do it too.  My point is that it won't
really make archeology more difficult.

The other typical counter argument is that it will cause conflicts with
existing patches.  That's true... but it's a one time cost, and those
are not conflicts that are difficult to resolve.  I have also tried "git
rebase --ignore-whitespace", it seems to work well.  Although that will
re-introduce the faulty indentation, so one needs to take care of fixing
the indentation in the patch after that (which is easy).

gdb/ChangeLog:

	* aarch64-linux-tdep.c: Fix indentation.
	* aarch64-ravenscar-thread.c: Fix indentation.
	* aarch64-tdep.c: Fix indentation.
	* aarch64-tdep.h: Fix indentation.
	* ada-lang.c: Fix indentation.
	* ada-lang.h: Fix indentation.
	* ada-tasks.c: Fix indentation.
	* ada-typeprint.c: Fix indentation.
	* ada-valprint.c: Fix indentation.
	* ada-varobj.c: Fix indentation.
	* addrmap.c: Fix indentation.
	* addrmap.h: Fix indentation.
	* agent.c: Fix indentation.
	* aix-thread.c: Fix indentation.
	* alpha-bsd-nat.c: Fix indentation.
	* alpha-linux-tdep.c: Fix indentation.
	* alpha-mdebug-tdep.c: Fix indentation.
	* alpha-nbsd-tdep.c: Fix indentation.
	* alpha-obsd-tdep.c: Fix indentation.
	* alpha-tdep.c: Fix indentation.
	* amd64-bsd-nat.c: Fix indentation.
	* amd64-darwin-tdep.c: Fix indentation.
	* amd64-linux-nat.c: Fix indentation.
	* amd64-linux-tdep.c: Fix indentation.
	* amd64-nat.c: Fix indentation.
	* amd64-obsd-tdep.c: Fix indentation.
	* amd64-tdep.c: Fix indentation.
	* amd64-windows-tdep.c: Fix indentation.
	* annotate.c: Fix indentation.
	* arc-tdep.c: Fix indentation.
	* arch-utils.c: Fix indentation.
	* arch/arm-get-next-pcs.c: Fix indentation.
	* arch/arm.c: Fix indentation.
	* arm-linux-nat.c: Fix indentation.
	* arm-linux-tdep.c: Fix indentation.
	* arm-nbsd-tdep.c: Fix indentation.
	* arm-pikeos-tdep.c: Fix indentation.
	* arm-tdep.c: Fix indentation.
	* arm-tdep.h: Fix indentation.
	* arm-wince-tdep.c: Fix indentation.
	* auto-load.c: Fix indentation.
	* auxv.c: Fix indentation.
	* avr-tdep.c: Fix indentation.
	* ax-gdb.c: Fix indentation.
	* ax-general.c: Fix indentation.
	* bfin-linux-tdep.c: Fix indentation.
	* block.c: Fix indentation.
	* block.h: Fix indentation.
	* blockframe.c: Fix indentation.
	* bpf-tdep.c: Fix indentation.
	* break-catch-sig.c: Fix indentation.
	* break-catch-syscall.c: Fix indentation.
	* break-catch-throw.c: Fix indentation.
	* breakpoint.c: Fix indentation.
	* breakpoint.h: Fix indentation.
	* bsd-uthread.c: Fix indentation.
	* btrace.c: Fix indentation.
	* build-id.c: Fix indentation.
	* buildsym-legacy.h: Fix indentation.
	* buildsym.c: Fix indentation.
	* c-typeprint.c: Fix indentation.
	* c-valprint.c: Fix indentation.
	* c-varobj.c: Fix indentation.
	* charset.c: Fix indentation.
	* cli/cli-cmds.c: Fix indentation.
	* cli/cli-decode.c: Fix indentation.
	* cli/cli-decode.h: Fix indentation.
	* cli/cli-script.c: Fix indentation.
	* cli/cli-setshow.c: Fix indentation.
	* coff-pe-read.c: Fix indentation.
	* coffread.c: Fix indentation.
	* compile/compile-cplus-types.c: Fix indentation.
	* compile/compile-object-load.c: Fix indentation.
	* compile/compile-object-run.c: Fix indentation.
	* completer.c: Fix indentation.
	* corefile.c: Fix indentation.
	* corelow.c: Fix indentation.
	* cp-abi.h: Fix indentation.
	* cp-namespace.c: Fix indentation.
	* cp-support.c: Fix indentation.
	* cp-valprint.c: Fix indentation.
	* cris-linux-tdep.c: Fix indentation.
	* cris-tdep.c: Fix indentation.
	* darwin-nat-info.c: Fix indentation.
	* darwin-nat.c: Fix indentation.
	* darwin-nat.h: Fix indentation.
	* dbxread.c: Fix indentation.
	* dcache.c: Fix indentation.
	* disasm.c: Fix indentation.
	* dtrace-probe.c: Fix indentation.
	* dwarf2/abbrev.c: Fix indentation.
	* dwarf2/attribute.c: Fix indentation.
	* dwarf2/expr.c: Fix indentation.
	* dwarf2/frame.c: Fix indentation.
	* dwarf2/index-cache.c: Fix indentation.
	* dwarf2/index-write.c: Fix indentation.
	* dwarf2/line-header.c: Fix indentation.
	* dwarf2/loc.c: Fix indentation.
	* dwarf2/macro.c: Fix indentation.
	* dwarf2/read.c: Fix indentation.
	* dwarf2/read.h: Fix indentation.
	* elfread.c: Fix indentation.
	* eval.c: Fix indentation.
	* event-top.c: Fix indentation.
	* exec.c: Fix indentation.
	* exec.h: Fix indentation.
	* expprint.c: Fix indentation.
	* f-lang.c: Fix indentation.
	* f-typeprint.c: Fix indentation.
	* f-valprint.c: Fix indentation.
	* fbsd-nat.c: Fix indentation.
	* fbsd-tdep.c: Fix indentation.
	* findvar.c: Fix indentation.
	* fork-child.c: Fix indentation.
	* frame-unwind.c: Fix indentation.
	* frame-unwind.h: Fix indentation.
	* frame.c: Fix indentation.
	* frv-linux-tdep.c: Fix indentation.
	* frv-tdep.c: Fix indentation.
	* frv-tdep.h: Fix indentation.
	* ft32-tdep.c: Fix indentation.
	* gcore.c: Fix indentation.
	* gdb_bfd.c: Fix indentation.
	* gdbarch.sh: Fix indentation.
	* gdbarch.c: Re-generate
	* gdbarch.h: Re-generate.
	* gdbcore.h: Fix indentation.
	* gdbthread.h: Fix indentation.
	* gdbtypes.c: Fix indentation.
	* gdbtypes.h: Fix indentation.
	* glibc-tdep.c: Fix indentation.
	* gnu-nat.c: Fix indentation.
	* gnu-nat.h: Fix indentation.
	* gnu-v2-abi.c: Fix indentation.
	* gnu-v3-abi.c: Fix indentation.
	* go32-nat.c: Fix indentation.
	* guile/guile-internal.h: Fix indentation.
	* guile/scm-cmd.c: Fix indentation.
	* guile/scm-frame.c: Fix indentation.
	* guile/scm-iterator.c: Fix indentation.
	* guile/scm-math.c: Fix indentation.
	* guile/scm-ports.c: Fix indentation.
	* guile/scm-pretty-print.c: Fix indentation.
	* guile/scm-value.c: Fix indentation.
	* h8300-tdep.c: Fix indentation.
	* hppa-linux-nat.c: Fix indentation.
	* hppa-linux-tdep.c: Fix indentation.
	* hppa-nbsd-nat.c: Fix indentation.
	* hppa-nbsd-tdep.c: Fix indentation.
	* hppa-obsd-nat.c: Fix indentation.
	* hppa-tdep.c: Fix indentation.
	* hppa-tdep.h: Fix indentation.
	* i386-bsd-nat.c: Fix indentation.
	* i386-darwin-nat.c: Fix indentation.
	* i386-darwin-tdep.c: Fix indentation.
	* i386-dicos-tdep.c: Fix indentation.
	* i386-gnu-nat.c: Fix indentation.
	* i386-linux-nat.c: Fix indentation.
	* i386-linux-tdep.c: Fix indentation.
	* i386-nto-tdep.c: Fix indentation.
	* i386-obsd-tdep.c: Fix indentation.
	* i386-sol2-nat.c: Fix indentation.
	* i386-tdep.c: Fix indentation.
	* i386-tdep.h: Fix indentation.
	* i386-windows-tdep.c: Fix indentation.
	* i387-tdep.c: Fix indentation.
	* i387-tdep.h: Fix indentation.
	* ia64-libunwind-tdep.c: Fix indentation.
	* ia64-libunwind-tdep.h: Fix indentation.
	* ia64-linux-nat.c: Fix indentation.
	* ia64-linux-tdep.c: Fix indentation.
	* ia64-tdep.c: Fix indentation.
	* ia64-tdep.h: Fix indentation.
	* ia64-vms-tdep.c: Fix indentation.
	* infcall.c: Fix indentation.
	* infcmd.c: Fix indentation.
	* inferior.c: Fix indentation.
	* infrun.c: Fix indentation.
	* iq2000-tdep.c: Fix indentation.
	* language.c: Fix indentation.
	* linespec.c: Fix indentation.
	* linux-fork.c: Fix indentation.
	* linux-nat.c: Fix indentation.
	* linux-tdep.c: Fix indentation.
	* linux-thread-db.c: Fix indentation.
	* lm32-tdep.c: Fix indentation.
	* m2-lang.c: Fix indentation.
	* m2-typeprint.c: Fix indentation.
	* m2-valprint.c: Fix indentation.
	* m32c-tdep.c: Fix indentation.
	* m32r-linux-tdep.c: Fix indentation.
	* m32r-tdep.c: Fix indentation.
	* m68hc11-tdep.c: Fix indentation.
	* m68k-bsd-nat.c: Fix indentation.
	* m68k-linux-nat.c: Fix indentation.
	* m68k-linux-tdep.c: Fix indentation.
	* m68k-tdep.c: Fix indentation.
	* machoread.c: Fix indentation.
	* macrocmd.c: Fix indentation.
	* macroexp.c: Fix indentation.
	* macroscope.c: Fix indentation.
	* macrotab.c: Fix indentation.
	* macrotab.h: Fix indentation.
	* main.c: Fix indentation.
	* mdebugread.c: Fix indentation.
	* mep-tdep.c: Fix indentation.
	* mi/mi-cmd-catch.c: Fix indentation.
	* mi/mi-cmd-disas.c: Fix indentation.
	* mi/mi-cmd-env.c: Fix indentation.
	* mi/mi-cmd-stack.c: Fix indentation.
	* mi/mi-cmd-var.c: Fix indentation.
	* mi/mi-cmds.c: Fix indentation.
	* mi/mi-main.c: Fix indentation.
	* mi/mi-parse.c: Fix indentation.
	* microblaze-tdep.c: Fix indentation.
	* minidebug.c: Fix indentation.
	* minsyms.c: Fix indentation.
	* mips-linux-nat.c: Fix indentation.
	* mips-linux-tdep.c: Fix indentation.
	* mips-nbsd-tdep.c: Fix indentation.
	* mips-tdep.c: Fix indentation.
	* mn10300-linux-tdep.c: Fix indentation.
	* mn10300-tdep.c: Fix indentation.
	* moxie-tdep.c: Fix indentation.
	* msp430-tdep.c: Fix indentation.
	* namespace.h: Fix indentation.
	* nat/fork-inferior.c: Fix indentation.
	* nat/gdb_ptrace.h: Fix indentation.
	* nat/linux-namespaces.c: Fix indentation.
	* nat/linux-osdata.c: Fix indentation.
	* nat/netbsd-nat.c: Fix indentation.
	* nat/x86-dregs.c: Fix indentation.
	* nbsd-nat.c: Fix indentation.
	* nbsd-tdep.c: Fix indentation.
	* nios2-linux-tdep.c: Fix indentation.
	* nios2-tdep.c: Fix indentation.
	* nto-procfs.c: Fix indentation.
	* nto-tdep.c: Fix indentation.
	* objfiles.c: Fix indentation.
	* objfiles.h: Fix indentation.
	* opencl-lang.c: Fix indentation.
	* or1k-tdep.c: Fix indentation.
	* osabi.c: Fix indentation.
	* osabi.h: Fix indentation.
	* osdata.c: Fix indentation.
	* p-lang.c: Fix indentation.
	* p-typeprint.c: Fix indentation.
	* p-valprint.c: Fix indentation.
	* parse.c: Fix indentation.
	* ppc-linux-nat.c: Fix indentation.
	* ppc-linux-tdep.c: Fix indentation.
	* ppc-nbsd-nat.c: Fix indentation.
	* ppc-nbsd-tdep.c: Fix indentation.
	* ppc-obsd-nat.c: Fix indentation.
	* ppc-ravenscar-thread.c: Fix indentation.
	* ppc-sysv-tdep.c: Fix indentation.
	* ppc64-tdep.c: Fix indentation.
	* printcmd.c: Fix indentation.
	* proc-api.c: Fix indentation.
	* producer.c: Fix indentation.
	* producer.h: Fix indentation.
	* prologue-value.c: Fix indentation.
	* prologue-value.h: Fix indentation.
	* psymtab.c: Fix indentation.
	* python/py-arch.c: Fix indentation.
	* python/py-bpevent.c: Fix indentation.
	* python/py-event.c: Fix indentation.
	* python/py-event.h: Fix indentation.
	* python/py-finishbreakpoint.c: Fix indentation.
	* python/py-frame.c: Fix indentation.
	* python/py-framefilter.c: Fix indentation.
	* python/py-inferior.c: Fix indentation.
	* python/py-infthread.c: Fix indentation.
	* python/py-objfile.c: Fix indentation.
	* python/py-prettyprint.c: Fix indentation.
	* python/py-registers.c: Fix indentation.
	* python/py-signalevent.c: Fix indentation.
	* python/py-stopevent.c: Fix indentation.
	* python/py-stopevent.h: Fix indentation.
	* python/py-threadevent.c: Fix indentation.
	* python/py-tui.c: Fix indentation.
	* python/py-unwind.c: Fix indentation.
	* python/py-value.c: Fix indentation.
	* python/py-xmethods.c: Fix indentation.
	* python/python-internal.h: Fix indentation.
	* python/python.c: Fix indentation.
	* ravenscar-thread.c: Fix indentation.
	* record-btrace.c: Fix indentation.
	* record-full.c: Fix indentation.
	* record.c: Fix indentation.
	* reggroups.c: Fix indentation.
	* regset.h: Fix indentation.
	* remote-fileio.c: Fix indentation.
	* remote.c: Fix indentation.
	* reverse.c: Fix indentation.
	* riscv-linux-tdep.c: Fix indentation.
	* riscv-ravenscar-thread.c: Fix indentation.
	* riscv-tdep.c: Fix indentation.
	* rl78-tdep.c: Fix indentation.
	* rs6000-aix-tdep.c: Fix indentation.
	* rs6000-lynx178-tdep.c: Fix indentation.
	* rs6000-nat.c: Fix indentation.
	* rs6000-tdep.c: Fix indentation.
	* rust-lang.c: Fix indentation.
	* rx-tdep.c: Fix indentation.
	* s12z-tdep.c: Fix indentation.
	* s390-linux-tdep.c: Fix indentation.
	* score-tdep.c: Fix indentation.
	* ser-base.c: Fix indentation.
	* ser-mingw.c: Fix indentation.
	* ser-uds.c: Fix indentation.
	* ser-unix.c: Fix indentation.
	* serial.c: Fix indentation.
	* sh-linux-tdep.c: Fix indentation.
	* sh-nbsd-tdep.c: Fix indentation.
	* sh-tdep.c: Fix indentation.
	* skip.c: Fix indentation.
	* sol-thread.c: Fix indentation.
	* solib-aix.c: Fix indentation.
	* solib-darwin.c: Fix indentation.
	* solib-frv.c: Fix indentation.
	* solib-svr4.c: Fix indentation.
	* solib.c: Fix indentation.
	* source.c: Fix indentation.
	* sparc-linux-tdep.c: Fix indentation.
	* sparc-nbsd-tdep.c: Fix indentation.
	* sparc-obsd-tdep.c: Fix indentation.
	* sparc-ravenscar-thread.c: Fix indentation.
	* sparc-tdep.c: Fix indentation.
	* sparc64-linux-tdep.c: Fix indentation.
	* sparc64-nbsd-tdep.c: Fix indentation.
	* sparc64-obsd-tdep.c: Fix indentation.
	* sparc64-tdep.c: Fix indentation.
	* stabsread.c: Fix indentation.
	* stack.c: Fix indentation.
	* stap-probe.c: Fix indentation.
	* stubs/ia64vms-stub.c: Fix indentation.
	* stubs/m32r-stub.c: Fix indentation.
	* stubs/m68k-stub.c: Fix indentation.
	* stubs/sh-stub.c: Fix indentation.
	* stubs/sparc-stub.c: Fix indentation.
	* symfile-mem.c: Fix indentation.
	* symfile.c: Fix indentation.
	* symfile.h: Fix indentation.
	* symmisc.c: Fix indentation.
	* symtab.c: Fix indentation.
	* symtab.h: Fix indentation.
	* target-float.c: Fix indentation.
	* target.c: Fix indentation.
	* target.h: Fix indentation.
	* tic6x-tdep.c: Fix indentation.
	* tilegx-linux-tdep.c: Fix indentation.
	* tilegx-tdep.c: Fix indentation.
	* top.c: Fix indentation.
	* tracefile-tfile.c: Fix indentation.
	* tracepoint.c: Fix indentation.
	* tui/tui-disasm.c: Fix indentation.
	* tui/tui-io.c: Fix indentation.
	* tui/tui-regs.c: Fix indentation.
	* tui/tui-stack.c: Fix indentation.
	* tui/tui-win.c: Fix indentation.
	* tui/tui-winsource.c: Fix indentation.
	* tui/tui.c: Fix indentation.
	* typeprint.c: Fix indentation.
	* ui-out.h: Fix indentation.
	* unittests/copy_bitwise-selftests.c: Fix indentation.
	* unittests/memory-map-selftests.c: Fix indentation.
	* utils.c: Fix indentation.
	* v850-tdep.c: Fix indentation.
	* valarith.c: Fix indentation.
	* valops.c: Fix indentation.
	* valprint.c: Fix indentation.
	* valprint.h: Fix indentation.
	* value.c: Fix indentation.
	* value.h: Fix indentation.
	* varobj.c: Fix indentation.
	* vax-tdep.c: Fix indentation.
	* windows-nat.c: Fix indentation.
	* windows-tdep.c: Fix indentation.
	* xcoffread.c: Fix indentation.
	* xml-syscall.c: Fix indentation.
	* xml-tdesc.c: Fix indentation.
	* xstormy16-tdep.c: Fix indentation.
	* xtensa-config.c: Fix indentation.
	* xtensa-linux-nat.c: Fix indentation.
	* xtensa-linux-tdep.c: Fix indentation.
	* xtensa-tdep.c: Fix indentation.

gdbserver/ChangeLog:

	* ax.cc: Fix indentation.
	* dll.cc: Fix indentation.
	* inferiors.h: Fix indentation.
	* linux-low.cc: Fix indentation.
	* linux-nios2-low.cc: Fix indentation.
	* linux-ppc-ipa.cc: Fix indentation.
	* linux-ppc-low.cc: Fix indentation.
	* linux-x86-low.cc: Fix indentation.
	* linux-xtensa-low.cc: Fix indentation.
	* regcache.cc: Fix indentation.
	* server.cc: Fix indentation.
	* tracepoint.cc: Fix indentation.

gdbsupport/ChangeLog:

	* common-exceptions.h: Fix indentation.
	* event-loop.cc: Fix indentation.
	* fileio.cc: Fix indentation.
	* filestuff.cc: Fix indentation.
	* gdb-dlfcn.cc: Fix indentation.
	* gdb_string_view.h: Fix indentation.
	* job-control.cc: Fix indentation.
	* signals.cc: Fix indentation.

Change-Id: I4bad7ae6be0fbe14168b8ebafb98ffe14964a695
 2020-11-02 10:28:45 -05:00
Simon Marchi
2677f2d3fd gdb: move declaration of valprint_check_validity to valprint.h 
The implementation is in valprint.c, so the declaration belongs in
valprint.h.

gdb/ChangeLog:

	* value.h (valprint_check_validity): Move declaration from
	here...
	* valprint.h (valprint_check_validity): ... to here.

Change-Id: Ibe577d3696720099e6d79888d4ee8e3c1bf05a26
 2020-08-24 22:51:50 -04:00
Andrew Burgess
e79eb02f2f gdb/fortran: resolve dynamic types when readjusting after an indirection 
After dereferencing a pointer (in value_ind) or following a
reference (in coerce_ref) we call readjust_indirect_value_type to
"fixup" the type of the resulting value object.

This fixup handles cases relating to the type of the resulting object
being different (a sub-class) of the original pointers target type.

If we encounter a pointer to a dynamic type then after dereferencing a
pointer (in value_ind) the type of the object created will have had
its dynamic type resolved.  However, in readjust_indirect_value_type,
we use the target type of the original pointer to "fixup" the type of
the resulting value.  In this case, the target type will be a dynamic
type, so the resulting value object, once again has a dynamic type.

This then triggers an assertion later within GDB.

The solution I propose here is that we call resolve_dynamic_type on
the pointer's target type (within readjust_indirect_value_type) so
that the resulting value is not converted back to a dynamic type.

The test case is based on the original test in the bug report.

gdb/ChangeLog:

	PR fortran/23051
	PR fortran/26139
	* valops.c (value_ind): Pass address to
	readjust_indirect_value_type.
	* value.c (readjust_indirect_value_type): Make parameter
	non-const, and add extra address parameter.  Resolve original type
	before using it.
	* value.h (readjust_indirect_value_type): Update function
	signature and comment.

gdb/testsuite/ChangeLog:

	PR fortran/23051
	PR fortran/26139
	* gdb.fortran/class-allocatable-array.exp: New file.
	* gdb.fortran/class-allocatable-array.f90: New file.
	* gdb.fortran/pointer-to-pointer.exp: New file.
	* gdb.fortran/pointer-to-pointer.f90: New file.
 2020-07-25 01:30:20 +01:00
Andrew Burgess
15e5fd3556 gdb: Convert language la_read_var_value field to a method 
This commit changes the language_data::la_read_var_value function
pointer member variable into a member function of language_defn.

An interesting aspect of this change is that the implementation of
language_defn::read_var_value is actually in findvar.c.  This is
partly historical, the new language_defn::read_var_value is a rename
of default_read_var_value, which was already in that file, but also,
that is the file that contains the helper functions needed by the
read_var_value method, so it makes sens that the method implementation
should continue to live there (I think).

There should be no user visible changes after this commit.

gdb/ChangeLog:

	* ada-lang.c (ada_read_var_value): Delete function, move
	implementation to...
	(ada_language::read_var_value): ...here.
	(ada_language_data): Delete la_read_var_value initializer.
	* c-lang.c (c_language_data): Likewise.
	(cplus_language_data): Likewise.
	(minimal_language_data): Likewise.
	* d-lang.c (d_language_data): Likewise.
	* f-lang.c (f_language_data): Likewise.
	* findvar.c (default_read_var_value): Rename to...
	(language_defn::read_var_value): ...this.
	* findvar.c (read_var_value): Update header comment, and change to
	call member function instead of function pointer.
	* go-lang.c (go_language_data): Likewise.
	* language.c (unknown_language_data): Delete la_read_var_value
	initializer.
	(auto_language_data): Likewise.
	* language.h (struct language_data): Delete la_read_var_value
	field.
	(language_defn::read_var_value): New member function.
	(default_read_var_value): Delete declaration.
	* m2-lang.c (m2_language_data): Delete la_read_var_value
	initializer.
	* objc-lang.c (objc_language_data): Likewise.
	* opencl-lang.c (opencl_language_data): Likewise.
	* p-lang.c (pascal_language_data): Likewise.
	* rust-lang.c (rust_language_data): Likewise.
	* value.h (default_read_var_value): Delete declaration.
 2020-06-02 13:53:10 +01:00
Tom Tromey
9c6a1327ad Rewrite the existing variant part code 
This rewrites the existing variant part code to follow the new model
implemented in the previous patch.  The old variant part code is
removed.

This only affects Rust for the moment.  I tested this using various
version of the Rust compiler, including one that emits old-style enum
debuginfo, exercising the quirks code.

gdb/ChangeLog
2020-04-24  Tom Tromey  <tromey@adacore.com>

	* dwarf2/read.c (struct variant_field): Rewrite.
	(struct variant_part_builder): New.
	(struct nextfield): Remove "variant" field.  Add "offset".
	(struct field_info): Add "current_variant_part" and
	"variant_parts".
	(alloc_discriminant_info): Remove.
	(alloc_rust_variant): New function.
	(quirk_rust_enum): Update.
	(dwarf2_add_field): Set "offset" member.  Don't handle
	DW_TAG_variant_part.
	(offset_map_type): New typedef.
	(convert_variant_range, create_one_variant)
	(create_one_variant_part, create_variant_parts)
	(add_variant_property): New functions.
	(dwarf2_attach_fields_to_type): Call add_variant_property.
	(read_structure_type): Don't handle DW_TAG_variant_part.
	(handle_variant_part, handle_variant): New functions.
	(handle_struct_member_die): Use them.
	(process_structure_scope): Don't handle variant parts.
	* gdbtypes.h (TYPE_FLAG_DISCRIMINATED_UNION): Remove.
	(struct discriminant_info): Remove.
	(enum dynamic_prop_node_kind) <DYN_PROP_DISCRIMINATED>: Remove.
	(struct main_type) <flag_discriminated_union>: Remove.
	* rust-lang.c (rust_enum_p, rust_empty_enum_p): Rewrite.
	(rust_enum_variant): Return int.  Remove "contents".  Rewrite.
	(rust_print_enum, rust_print_struct_def, rust_evaluate_subexp):
	Update.
	* valops.c (value_union_variant): Remove.
	* value.h (value_union_variant): Don't declare.
 2020-04-24 13:40:32 -06:00
Tom Tromey
ef83a141a2 Add new variant part code 
This patch adds the infrastructure for the new variant part code.  At
this point, nothing uses this code.  This is done in a separate patch
to make it simpler to review.

I examined a few possible approaches to handling variant parts.  In
particular, I considered having a DWARF variant part be a union
(similar to how the Rust code works now); and I considered having type
fields have a flag indicating that they are variants.

Having separate types seemed bad conceptually, because these variants
aren't truly separate -- they rely on the "parent" type.  And,
changing how fields worked seemed excessively invasive.

So, in the end I thought the approach taken in this patch was both
simple to implement and understand, without losing generality.  The
idea in this patch is that all the fields of a type with variant parts
will be stored in a single field array, just as if they'd all been
listed directly.  Then, the variants are attached as a dynamic
property.  These control which fields end up in the type that's
constructed during dynamic type resolution.

gdb/ChangeLog
2020-04-24  Tom Tromey  <tromey@adacore.com>

	* gdbtypes.c (is_dynamic_type_internal): Check for variant parts.
	(variant::matches, compute_variant_fields_recurse)
	(compute_variant_fields_inner, compute_variant_fields): New
	functions.
	(resolve_dynamic_struct): Check for DYN_PROP_VARIANT_PARTS.
	Use resolved_type after type is made.
	(operator==): Add new cases.
	* gdbtypes.h (TYPE_HAS_VARIANT_PARTS): New macro.
	(struct discriminant_range, struct variant, struct variant_part):
	New.
	(union dynamic_prop_data) <variant_parts, original_type>: New
	members.
	(enum dynamic_prop_node_kind) <DYN_PROP_VARIANT_PARTS>: New constant.
	(enum dynamic_prop_kind) <PROP_TYPE, PROP_VARIANT_PARTS>: New
	constants.
	* value.c (unpack_bits_as_long): Now public.
	* value.h (unpack_bits_as_long): Declare.
 2020-04-24 13:40:31 -06:00
Tom Tromey
6b4a335bf7 Fix value_literal_complex comment 
Christian pointed out that the value_literal_complex was still a bit
weird; this patch rewrites it and moves it to value.h.

gdb/ChangeLog
2020-04-01  Tom Tromey  <tom@tromey.com>

	* value.h (value_literal_complex): Add comment.
	* valops.c (value_literal_complex): Refer to value.h.
 2020-04-01 14:09:53 -06:00
Tom Tromey
4c99290df0 Add accessors for members of complex numbers 
This introduces two new functions that make it simpler to access the
components of a complex number.

gdb/ChangeLog
2020-04-01  Tom Tromey  <tom@tromey.com>

	* valprint.c (generic_value_print_complex): Use accessors.
	* value.h (value_real_part, value_imaginary_part): Declare.
	* valops.c (value_real_part, value_imaginary_part): New
	functions.
	* value.c (creal_internal_fn, cimag_internal_fn): Use accessors.
 2020-04-01 14:09:52 -06:00
Tom Tromey
426a9c18dd Remove val_print 
We can finally remove val_print and various helper functions that are
no longer needed.

gdb/ChangeLog
2020-03-13  Tom Tromey  <tom@tromey.com>

	* value.h (val_print): Don't declare.
	* valprint.h (val_print_array_elements)
	(val_print_scalar_formatted, generic_val_print): Don't declare.
	* valprint.c (generic_val_print_array): Take a struct value.
	(generic_val_print_ptr, generic_val_print_memberptr)
	(generic_val_print_bool, generic_val_print_int)
	(generic_val_print_char, generic_val_print_complex)
	(generic_val_print): Remove.
	(generic_value_print): Update.
	(do_val_print): Remove unused parameters.  Don't call
	la_val_print.
	(val_print): Remove.
	(common_val_print): Update.  Don't call value_check_printable.
	(val_print_scalar_formatted, val_print_array_elements): Remove.
	* rust-lang.c (rust_val_print): Remove.
	(rust_language_defn): Update.
	* p-valprint.c (pascal_val_print): Remove.
	(pascal_value_print_inner): Update.
	(pascal_object_print_val_fields, pascal_object_print_val):
	Remove.
	(pascal_object_print_static_field): Update.
	* p-lang.h (pascal_val_print): Don't declare.
	* p-lang.c (pascal_language_defn): Update.
	* opencl-lang.c (opencl_language_defn): Update.
	* objc-lang.c (objc_language_defn): Update.
	* m2-valprint.c (m2_print_unbounded_array, m2_val_print): Remove.
	* m2-lang.h (m2_val_print): Don't declare.
	* m2-lang.c (m2_language_defn): Update.
	* language.h (struct language_defn) <la_val_print>: Remove.
	* language.c (unk_lang_value_print_inner): Rename.  Change
	argument types.
	(unknown_language_defn, auto_language_defn): Update.
	* go-valprint.c (go_val_print): Remove.
	* go-lang.h (go_val_print): Don't declare.
	* go-lang.c (go_language_defn): Update.
	* f-valprint.c (f_val_print): Remove.
	* f-lang.h (f_value_print): Don't declare.
	* f-lang.c (f_language_defn): Update.
	* d-valprint.c (d_val_print): Remove.
	* d-lang.h (d_value_print): Don't declare.
	* d-lang.c (d_language_defn): Update.
	* cp-valprint.c (cp_print_value_fields)
	(cp_print_value_fields_rtti, cp_print_value): Remove.
	(cp_print_static_field): Update.
	* c-valprint.c (c_val_print_array, c_val_print_ptr)
	(c_val_print_struct, c_val_print_union, c_val_print_int)
	(c_val_print_memberptr, c_val_print): Remove.
	* c-lang.h (c_val_print_array, cp_print_value_fields)
	(cp_print_value_fields_rtti): Don't declare.
	* c-lang.c (c_language_defn, cplus_language_defn)
	(asm_language_defn, minimal_language_defn): Update.
	* ada-valprint.c (ada_val_print_ptr, ada_val_print_num): Remove.
	(ada_val_print_enum): Take a struct value.
	(ada_val_print_flt, ada_val_print_array, ada_val_print_1)
	(ada_val_print): Remove.
	(ada_value_print_1): Update.
	(printable_val_type): Remove.
	* ada-lang.h (ada_val_print): Don't declare.
	* ada-lang.c (ada_language_defn): Update.
 2020-03-13 18:03:42 -06:00
Joel Brobecker
b811d2c292 Update copyright year range in all GDB files. 
gdb/ChangeLog:

        Update copyright year range in all GDB files.
 2020-01-01 10:20:53 +04:00
Tom Tromey
d5a22e77b5 Remove gdbarch_bits_big_endian 
From what I can tell, set_gdbarch_bits_big_endian has never been used.
That is, all architectures since its introduction have simply used the
default, which is simply check the architecture's byte-endianness.

Because this interferes with the scalar_storage_order code, this patch
removes this gdbarch setting entirely.  In some places,
type_byte_order is used rather than the plain gdbarch.

gdb/ChangeLog
2019-12-04  Tom Tromey  <tromey@adacore.com>

	* ada-lang.c (decode_constrained_packed_array)
	(ada_value_assign, value_assign_to_component): Update.
	* dwarf2loc.c (rw_pieced_value, access_memory)
	(dwarf2_compile_expr_to_ax): Update.
	* dwarf2read.c (dwarf2_add_field): Update.
	* eval.c (evaluate_subexp_standard): Update.
	* gdbarch.c, gdbarch.h: Rebuild.
	* gdbarch.sh (bits_big_endian): Remove.
	* gdbtypes.h (union field_location): Update comment.
	* target-descriptions.c (make_gdb_type): Update.
	* valarith.c (value_bit_index): Update.
	* value.c (struct value) <bitpos>: Update comment.
	(unpack_bits_as_long, modify_field): Update.
	* value.h (value_bitpos): Update comment.

Change-Id: I379b5e0c408ec8742f7a6c6b721108e73ed1b018
 2019-12-04 09:31:18 -07:00
Tom Tromey
3ea16160a6 Let commands free "name" 
This adds a "name_allocated" field to cmd_list_element, so that
commands can own their "name" when necessary.  Then, this changes a
few spots in gdb that currently free the name by hand to instead use
this facility.

gdb/ChangeLog
2019-11-26  Tom Tromey  <tom@tromey.com>

	* python/py-function.c (fnpy_init): Update.
	* value.h (add_internal_function): Adjust declaration.
	* value.c (function_destroyer): Remove.
	(do_add_internal_function): Don't set destroyer or copy name.
	(add_internal_function): Take unique_xmalloc_ptr<char> for name.
	Set name_allocated.
	* python/py-cmd.c (cmdpy_destroyer): Don't free "name".
	(cmdpy_init): Set name_allocated.
	* cli/cli-decode.h (struct cmd_list_element) <name_allocated>: New
	member.
	(~cmd_list_element): Free "name" if needed.

Change-Id: Ie1435cea5bbf4bd92056125f112917c607cbb761
 2019-11-26 14:20:30 -07:00
Tom Tromey
1a6d41c643 Add add_internal_function overload 
add_internal_function sets a command destroyer that frees the doc
string.  However, many callers do not pass in an allocated doc string.

This adds a new overload to clearly differentiate the two cases,
fixing the latent bug.

gdb/ChangeLog
2019-11-26  Tom Tromey  <tom@tromey.com>

	* value.h (add_internal_function): Add new overload.  Move
	documentation from value.h.
	* value.c (do_add_internal_function): New function.
	(add_internal_function): Use it.  Add new overload.
	(function_destroyer): Don't free doc.
	* python/py-function.c (fnpy_init): Update.

Change-Id: I3f6df925bc6b3e1bccbad9eeebc487b908bb5a2a
 2019-11-26 14:20:29 -07:00
Tom de Vries
30baf67b65 [gdb] Fix more typos in comments (2) 
Fix typos in comments.  NFC.

Tested on x86_64-linux.

gdb/ChangeLog:

2019-10-26  Tom de Vries  <tdevries@suse.de>

	* aarch64-linux-tdep.c: Fix typos in comments.
	* aarch64-tdep.c: Same.
	* ada-lang.c: Same.
	* amd64-nat.c: Same.
	* arc-tdep.c: Same.
	* arch/aarch64-insn.c: Same.
	* block.c: Same.
	* breakpoint.h: Same.
	* btrace.h: Same.
	* c-varobj.c: Same.
	* cli/cli-decode.c: Same.
	* cli/cli-script.c: Same.
	* cli/cli-utils.h: Same.
	* coff-pe-read.c: Same.
	* coffread.c: Same.
	* compile/compile-cplus-symbols.c: Same.
	* compile/compile-object-run.c: Same.
	* completer.c: Same.
	* corelow.c: Same.
	* cp-support.c: Same.
	* demangle.c: Same.
	* dwarf-index-write.c: Same.
	* dwarf2-frame.c: Same.
	* dwarf2-frame.h: Same.
	* eval.c: Same.
	* frame-base.h: Same.
	* frame.h: Same.
	* gdbcmd.h: Same.
	* gdbtypes.h: Same.
	* gnu-nat.c: Same.
	* guile/scm-objfile.c: Same.
	* i386-tdep.c: Same.
	* i386-tdep.h: Same.
	* infcall.c: Same.
	* infcall.h: Same.
	* linux-nat.c: Same.
	* m68k-tdep.c: Same.
	* macroexp.c: Same.
	* memattr.c: Same.
	* mi/mi-cmd-disas.c: Same.
	* mi/mi-getopt.h: Same.
	* mi/mi-main.c: Same.
	* minsyms.c: Same.
	* nat/aarch64-sve-linux-sigcontext.h: Same.
	* objfiles.h: Same.
	* ppc-linux-nat.c: Same.
	* ppc-linux-tdep.c: Same.
	* ppc-tdep.h: Same.
	* progspace.h: Same.
	* prologue-value.h: Same.
	* python/py-evtregistry.c: Same.
	* python/py-instruction.h: Same.
	* record-btrace.c: Same.
	* record-full.c: Same.
	* remote.c: Same.
	* rs6000-tdep.c: Same.
	* ser-tcp.c: Same.
	* sol-thread.c: Same.
	* sparc-sol2-tdep.c: Same.
	* sparc64-tdep.c: Same.
	* stabsread.c: Same.
	* symfile.c: Same.
	* symtab.h: Same.
	* target.c: Same.
	* tracepoint.c: Same.
	* tui/tui-data.h: Same.
	* tui/tui-io.c: Same.
	* tui/tui-win.c: Same.
	* tui/tui.c: Same.
	* unittests/rsp-low-selftests.c: Same.
	* user-regs.h: Same.
	* utils.c: Same.
	* utils.h: Same.
	* valarith.c: Same.
	* valops.c: Same.
	* valprint.c: Same.
	* valprint.h: Same.
	* value.c: Same.
	* value.h: Same.
	* varobj.c: Same.
	* x86-nat.h: Same.
	* xtensa-tdep.c: Same.

gdb/gdbserver/ChangeLog:

2019-10-26  Tom de Vries  <tdevries@suse.de>

	* linux-aarch64-low.c: Fix typos in comments.
	* linux-arm-low.c: Same.
	* linux-low.c: Same.
	* linux-ppc-low.c: Same.
	* proc-service.c: Same.
	* regcache.h: Same.
	* server.c: Same.
	* tracepoint.c: Same.
	* win32-low.c: Same.

gdb/stubs/ChangeLog:

2019-10-26  Tom de Vries  <tdevries@suse.de>

	* ia64vms-stub.c: Fix typos in comments.
	* m32r-stub.c: Same.
	* m68k-stub.c: Same.
	* sh-stub.c: Same.

gdb/testsuite/ChangeLog:

2019-10-26  Tom de Vries  <tdevries@suse.de>

	* gdb.base/bigcore.c: Fix typos in comments.
	* gdb.base/ctf-ptype.c: Same.
	* gdb.base/long_long.c: Same.
	* gdb.dwarf2/dw2-op-out-param.S: Same.
	* gdb.python/py-evthreads.c: Same.
	* gdb.reverse/i387-stack-reverse.c: Same.
	* gdb.trace/tfile.c: Same.
	* lib/compiler.c: Same.
	* lib/compiler.cc: Same.

Change-Id: I8573d84a577894270179ae30f46c48d806fc1beb
 2019-10-26 09:55:32 +02:00
Christian Biesinger
e4153ae630 Move declaration of overload_resolution to value.h 
The variable is defined in valops.c and has an extern decl in
eval.c; move it to the header file.

gdb/ChangeLog:

2019-09-19  Christian Biesinger  <cbiesinger@google.com>

	* eval.c: Move declaration of overload_resolution to...
	* value.h: ...here.
 2019-09-20 09:19:15 +09:00
Andrew Burgess
592f9d271c gdb: Update type of lower bound in value_subscripted_rvalue 
The dynamic lower (and upper) bounds of ranges are stored as type
LONGEST (see union dynamic_prop_data in gdbtypes.h).  In most places
that range bounds are handled they are held in a LONGEST, however in
value_subscripted_rvalue the bound is placed into an int.

This commit changes value_subscripted_rvalue to use LONGEST, there
should be no user visible changes after this commit.

gdb/ChangeLog:

	* valarith.c (value_subscripted_rvalue): Change lowerbound
	parameter type from int to LONGEST.
	* value.h (value_subscripted_rvalue): Likewise in declaration.
 2019-07-12 12:09:52 +01:00
Simon Marchi
00db953196 Make value_must_coerce_to_target return a bool 
... and move comment to header file.

gdb/ChangeLog:

	* valops.c (value_must_coerce_to_target): Change return type to
	bool.
	* value.h (value_must_coerce_to_target): Likewise.
 2019-07-10 21:49:32 -04:00
Tom Tromey
268a13a5a3 Rename common to gdbsupport 
This is the next patch in the ongoing series to move gdbsever to the
top level.

This patch just renames the "common" directory.  The idea is to do
this move in two parts: first rename the directory (this patch), then
move the directory to the top.  This approach makes the patches a bit
more tractable.

I chose the name "gdbsupport" for the directory.  However, as this
patch was largely written by sed, we could pick a new name without too
much difficulty.

Tested by the buildbot.

gdb/ChangeLog
2019-07-09  Tom Tromey  <tom@tromey.com>

	* contrib/ari/gdb_ari.sh: Change common to gdbsupport.
	* configure: Rebuild.
	* configure.ac: Change common to gdbsupport.
	* gdbsupport: Rename from common.
	* acinclude.m4: Change common to gdbsupport.
	* Makefile.in (CONFIG_SRC_SUBDIR, COMMON_SFILES)
	(HFILES_NO_SRCDIR, stamp-version, ALLDEPFILES): Change common to
	gdbsupport.
	* aarch64-tdep.c, ada-lang.c, ada-lang.h, agent.c, alloc.c,
	amd64-darwin-tdep.c, amd64-dicos-tdep.c, amd64-fbsd-nat.c,
	amd64-fbsd-tdep.c, amd64-linux-nat.c, amd64-linux-tdep.c,
	amd64-nbsd-tdep.c, amd64-obsd-tdep.c, amd64-sol2-tdep.c,
	amd64-tdep.c, amd64-windows-tdep.c, arch-utils.c,
	arch/aarch64-insn.c, arch/aarch64.c, arch/aarch64.h, arch/amd64.c,
	arch/amd64.h, arch/arm-get-next-pcs.c, arch/arm-linux.c,
	arch/arm.c, arch/i386.c, arch/i386.h, arch/ppc-linux-common.c,
	arch/riscv.c, arch/riscv.h, arch/tic6x.c, arm-tdep.c, auto-load.c,
	auxv.c, ax-gdb.c, ax-general.c, ax.h, breakpoint.c, breakpoint.h,
	btrace.c, btrace.h, build-id.c, build-id.h, c-lang.h, charset.c,
	charset.h, cli/cli-cmds.c, cli/cli-cmds.h, cli/cli-decode.c,
	cli/cli-dump.c, cli/cli-option.h, cli/cli-script.c,
	coff-pe-read.c, command.h, compile/compile-c-support.c,
	compile/compile-c.h, compile/compile-cplus-symbols.c,
	compile/compile-cplus-types.c, compile/compile-cplus.h,
	compile/compile-loc2c.c, compile/compile.c, completer.c,
	completer.h, contrib/ari/gdb_ari.sh, corefile.c, corelow.c,
	cp-support.c, cp-support.h, cp-valprint.c, csky-tdep.c, ctf.c,
	darwin-nat.c, debug.c, defs.h, disasm-selftests.c, disasm.c,
	disasm.h, dtrace-probe.c, dwarf-index-cache.c,
	dwarf-index-cache.h, dwarf-index-write.c, dwarf2-frame.c,
	dwarf2expr.c, dwarf2loc.c, dwarf2read.c, event-loop.c,
	event-top.c, exceptions.c, exec.c, extension.h, fbsd-nat.c,
	features/aarch64-core.c, features/aarch64-fpu.c,
	features/aarch64-pauth.c, features/aarch64-sve.c,
	features/i386/32bit-avx.c, features/i386/32bit-avx512.c,
	features/i386/32bit-core.c, features/i386/32bit-linux.c,
	features/i386/32bit-mpx.c, features/i386/32bit-pkeys.c,
	features/i386/32bit-segments.c, features/i386/32bit-sse.c,
	features/i386/64bit-avx.c, features/i386/64bit-avx512.c,
	features/i386/64bit-core.c, features/i386/64bit-linux.c,
	features/i386/64bit-mpx.c, features/i386/64bit-pkeys.c,
	features/i386/64bit-segments.c, features/i386/64bit-sse.c,
	features/i386/x32-core.c, features/riscv/32bit-cpu.c,
	features/riscv/32bit-csr.c, features/riscv/32bit-fpu.c,
	features/riscv/64bit-cpu.c, features/riscv/64bit-csr.c,
	features/riscv/64bit-fpu.c, features/tic6x-c6xp.c,
	features/tic6x-core.c, features/tic6x-gp.c, filename-seen-cache.h,
	findcmd.c, findvar.c, fork-child.c, gcore.c, gdb_bfd.c, gdb_bfd.h,
	gdb_proc_service.h, gdb_regex.c, gdb_select.h, gdb_usleep.c,
	gdbarch-selftests.c, gdbthread.h, gdbtypes.h, gnu-nat.c,
	go32-nat.c, guile/guile.c, guile/scm-ports.c,
	guile/scm-safe-call.c, guile/scm-type.c, i386-fbsd-nat.c,
	i386-fbsd-tdep.c, i386-go32-tdep.c, i386-linux-nat.c,
	i386-linux-tdep.c, i386-tdep.c, i387-tdep.c,
	ia64-libunwind-tdep.c, ia64-linux-nat.c, inf-child.c,
	inf-ptrace.c, infcall.c, infcall.h, infcmd.c, inferior-iter.h,
	inferior.c, inferior.h, inflow.c, inflow.h, infrun.c, infrun.h,
	inline-frame.c, language.h, linespec.c, linux-fork.c, linux-nat.c,
	linux-tdep.c, linux-thread-db.c, location.c, machoread.c,
	macrotab.h, main.c, maint.c, maint.h, memattr.c, memrange.h,
	mi/mi-cmd-break.h, mi/mi-cmd-env.c, mi/mi-cmd-stack.c,
	mi/mi-cmd-var.c, mi/mi-interp.c, mi/mi-main.c, mi/mi-parse.h,
	minsyms.c, mips-linux-tdep.c, namespace.h,
	nat/aarch64-linux-hw-point.c, nat/aarch64-linux-hw-point.h,
	nat/aarch64-linux.c, nat/aarch64-sve-linux-ptrace.c,
	nat/amd64-linux-siginfo.c, nat/fork-inferior.c,
	nat/linux-btrace.c, nat/linux-btrace.h, nat/linux-namespaces.c,
	nat/linux-nat.h, nat/linux-osdata.c, nat/linux-personality.c,
	nat/linux-procfs.c, nat/linux-ptrace.c, nat/linux-ptrace.h,
	nat/linux-waitpid.c, nat/mips-linux-watch.c,
	nat/mips-linux-watch.h, nat/ppc-linux.c, nat/x86-dregs.c,
	nat/x86-dregs.h, nat/x86-linux-dregs.c, nat/x86-linux.c,
	nto-procfs.c, nto-tdep.c, objfile-flags.h, objfiles.c, objfiles.h,
	obsd-nat.c, observable.h, osdata.c, p-valprint.c, parse.c,
	parser-defs.h, ppc-linux-nat.c, printcmd.c, probe.c, proc-api.c,
	procfs.c, producer.c, progspace.h, psymtab.h,
	python/py-framefilter.c, python/py-inferior.c, python/py-ref.h,
	python/py-type.c, python/python.c, record-btrace.c, record-full.c,
	record.c, record.h, regcache-dump.c, regcache.c, regcache.h,
	remote-fileio.c, remote-fileio.h, remote-sim.c, remote.c,
	riscv-tdep.c, rs6000-aix-tdep.c, rust-exp.y, s12z-tdep.c,
	selftest-arch.c, ser-base.c, ser-event.c, ser-pipe.c, ser-tcp.c,
	ser-unix.c, skip.c, solib-aix.c, solib-target.c, solib.c,
	source-cache.c, source.c, source.h, sparc-nat.c, spu-linux-nat.c,
	stack.c, stap-probe.c, symfile-add-flags.h, symfile.c, symfile.h,
	symtab.c, symtab.h, target-descriptions.c, target-descriptions.h,
	target-memory.c, target.c, target.h, target/waitstatus.c,
	target/waitstatus.h, thread-iter.h, thread.c, tilegx-tdep.c,
	top.c, top.h, tracefile-tfile.c, tracefile.c, tracepoint.c,
	tracepoint.h, tui/tui-io.c, ui-file.c, ui-out.h,
	unittests/array-view-selftests.c,
	unittests/child-path-selftests.c, unittests/cli-utils-selftests.c,
	unittests/common-utils-selftests.c,
	unittests/copy_bitwise-selftests.c, unittests/environ-selftests.c,
	unittests/format_pieces-selftests.c,
	unittests/function-view-selftests.c,
	unittests/lookup_name_info-selftests.c,
	unittests/memory-map-selftests.c, unittests/memrange-selftests.c,
	unittests/mkdir-recursive-selftests.c,
	unittests/observable-selftests.c,
	unittests/offset-type-selftests.c, unittests/optional-selftests.c,
	unittests/parse-connection-spec-selftests.c,
	unittests/ptid-selftests.c, unittests/rsp-low-selftests.c,
	unittests/scoped_fd-selftests.c,
	unittests/scoped_mmap-selftests.c,
	unittests/scoped_restore-selftests.c,
	unittests/string_view-selftests.c, unittests/style-selftests.c,
	unittests/tracepoint-selftests.c, unittests/unpack-selftests.c,
	unittests/utils-selftests.c, unittests/xml-utils-selftests.c,
	utils.c, utils.h, valarith.c, valops.c, valprint.c, value.c,
	value.h, varobj.c, varobj.h, windows-nat.c, x86-linux-nat.c,
	xml-support.c, xml-support.h, xml-tdesc.h, xstormy16-tdep.c,
	xtensa-linux-nat.c, dwarf2read.h: Change common to gdbsupport.

gdb/gdbserver/ChangeLog
2019-07-09  Tom Tromey  <tom@tromey.com>

	* configure: Rebuild.
	* configure.ac: Change common to gdbsupport.
	* acinclude.m4: Change common to gdbsupport.
	* Makefile.in (SFILES, OBS, GDBREPLAY_OBS, IPA_OBJS)
	(version-generated.c, gdbsupport/%-ipa.o, gdbsupport/%.o): Change
	common to gdbsupport.
	* ax.c, event-loop.c, fork-child.c, gdb_proc_service.h,
	gdbreplay.c, gdbthread.h, hostio-errno.c, hostio.c, i387-fp.c,
	inferiors.c, inferiors.h, linux-aarch64-tdesc-selftest.c,
	linux-amd64-ipa.c, linux-i386-ipa.c, linux-low.c,
	linux-tic6x-low.c, linux-x86-low.c, linux-x86-tdesc-selftest.c,
	linux-x86-tdesc.c, lynx-i386-low.c, lynx-low.c, mem-break.h,
	nto-x86-low.c, regcache.c, regcache.h, remote-utils.c, server.c,
	server.h, spu-low.c, symbol.c, target.h, tdesc.c, tdesc.h,
	thread-db.c, tracepoint.c, win32-i386-low.c, win32-low.c: Change
	common to gdbsupport.
 2019-07-09 07:45:38 -06:00
Sergio Durigan Junior
9d1447e09d Destroy allocated values when exiting GDB 
When the user exits GDB, we might still have some allocated values in
the chain, which, in specific scenarios, can cause problems when GDB
attempts to destroy them in "quit_force".  For example, see the bug
reported at:

  https://bugzilla.redhat.com/show_bug.cgi?id=1690120

And the thread starting at:

  https://sourceware.org/ml/gdb-patches/2019-03/msg00475.html
  Message-ID: <87r2azkhmq.fsf@redhat.com>

In order to avoid that, and to be more aware of our allocated
resources, this commit implements a new function "finalize_values" and
calls it from inside "quit_force".

Tested by the BuildBot.

2019-04-01  Sergio Durigan Junior  <sergiodj@redhat.com>
	    Pedro Alves  <palves@redhat.com>

	* top.c (quit_force): Call 'finalize_values'.
	* value.c (finalize_values): New function.
	* value.h (finalize_values): Declare.
 2019-04-01 10:58:12 -04:00
Andrew Burgess
7584bb30cf gdb: Move value_from_host_double into value.c and make more use of it 
The function value_from_host_double can be moved from f-lang.c into
value.c as a generally useful function, and then used more widely.

Tested on X86-64/GNU Linux with no regressions.

gdb/ChangeLog:

	* f-lang.c (value_from_host_double): Moved to...
	* value.c (value_from_host_double): ...here.
	* value.h (value_from_host_double): Declare.
	* guile/scm-math.c (vlscm_convert_typed_number): Use
	value_from_host_double.
	(vlscm_convert_number): Likewise.
	* guile/scm-value.c (gdbscm_value_to_real): Likewise.
	* python/py-value.c (convert_value_from_python): Likewise.
 2019-03-07 14:53:37 +00:00
Joel Brobecker
42a4f53d2b Update copyright year range in all GDB files. 
This commit applies all changes made after running the gdb/copyright.py
script.

Note that one file was flagged by the script, due to an invalid
copyright header
(gdb/unittests/basic_string_view/element_access/char/empty.cc).
As the file was copied from GCC's libstdc++-v3 testsuite, this commit
leaves this file untouched for the time being; a patch to fix the header
was sent to gcc-patches first.

gdb/ChangeLog:

	Update copyright year range in all GDB files.
 2019-01-01 10:01:51 +04:00
Pedro Alves
6b1747cd13 invoke_xmethod & array_view 
This replaces more pointer+length with gdb::array_view.  This time,
around invoke_xmethod, and then propagating the fallout around, which
inevitably leaks to the overload resolution code.

There are several places in the code that want to grab a slice of an
array, by advancing the array pointer, and decreasing the length
pointer.  This patch introduces a pair of new
gdb::array_view::slice(...) methods to make that convenient and clear.
Unit test included.

gdb/ChangeLog:
2018-11-21  Pedro Alves  <palves@redhat.com>

	* common/array-view.h (array_view::splice(size_type, size_t)): New.
	(array_view::splice(size_type)): New.
	* eval.c (eval_call, evaluate_funcall): Adjust to use array_view.
	* extension.c (xmethod_worker::get_arg_types): Adjust to return an
	std::vector.
	(xmethod_worker::get_result_type): Adjust to use gdb::array_view.
	* extension.h: Include "common/array-view.h".
	(xmethod_worker::invoke): Adjust to use gdb::array_view.
	(xmethod_worker::get_arg_types): Adjust to return an std::vector.
	(xmethod_worker::get_result_type): Adjust to use gdb::array_view.
	(xmethod_worker::do_get_arg_types): Adjust to use std::vector.
	(xmethod_worker::do_get_result_type): Adjust to use
	gdb::array_view.
	* gdbtypes.c (rank_function): Adjust to use gdb::array_view.
	* gdbtypes.h: Include "common/array-view.h".
	(rank_function): Adjust to use gdb::array_view.
	* python/py-xmethods.c (python_xmethod_worker::invoke)
	(python_xmethod_worker::do_get_arg_types)
	(python_xmethod_worker::do_get_result_type)
	(python_xmethod_worker::invoke): Adjust to new interfaces.
	* valarith.c (value_user_defined_cpp_op, value_user_defined_op)
	(value_x_binop, value_x_unop): Adjust to use gdb::array_view.
	* valops.c (find_overload_match, find_oload_champ_namespace)
	(find_oload_champ_namespace_loop, find_oload_champ): Adjust to use
	gdb:array_view and the new xmethod_worker interfaces.
	* value.c (result_type_of_xmethod, call_xmethod): Adjust to use
	gdb::array_view.
	* value.h (find_overload_match, result_type_of_xmethod)
	(call_xmethod): Adjust to use gdb::array_view.
	* unittests/array-view-selftests.c: Add slicing tests.
 2018-11-21 12:06:20 +00:00
Tom Tromey
bbfa6f0086 Use new_reference for struct value 
value_incref returned its argument just as a convenience, which in the
end turned out to only be used in precisely the cases where
new_reference helps.  So, this patch changes value_incref to return
void and changes some value-using code to use new_reference.

I also noticed that the comments for value_incref and value_decref
were swapped, so this patch fixes those.

ChangeLog
2018-04-30  Tom Tromey  <tom@tromey.com>

	* varobj.c (install_new_value): Use new_reference.
	* value.h (value_incref): Return void.  Swap intro comment with
	value_decref.
	* value.c (set_value_parent): Use new_reference.
	(value_incref): Return void.  Update intro comment.
	(release_value): Use new_reference.
	* dwarf2loc.c (dwarf2_evaluate_loc_desc_full): Use new_reference.
 2018-04-30 11:33:11 -06:00
Tom Tromey
a6535de190 Remove free_value_chain 
This patch changes value_release_to_mark and fetch_subexp_value to
return a std::vector of value references, rather than relying on the
"next" field that is contained in a struct value.  This makes it
simpler to reason about the returned values, and also allows for the
removal of free_value_chain.

gdb/ChangeLog
2018-04-06  Tom Tromey  <tom@tromey.com>

	* value.h (fetch_subexp_value, value_release_to_mark): Update.
	(free_value_chain): Remove.
	* value.c (free_value_chain): Remove.
	(value_release_to_mark): Return a std::vector.
	* ppc-linux-nat.c (num_memory_accesses): Change "chain" to a
	std::vector.
	(check_condition): Update.
	* eval.c (fetch_subexp_value): Change "val_chain" to a
	std::vector.
	* breakpoint.c (update_watchpoint): Update.
	(can_use_hardware_watchpoint): Change "vals" to a std::vector.
 2018-04-06 15:44:49 -06:00
Tom Tromey
b562120198 Remove free_all_values 
free_all_values is unused, so this removes it.

gdb/ChangeLog
2018-04-06  Tom Tromey  <tom@tromey.com>

	* value.h (free_all_values): Remove.
	* value.c (free_all_values): Remove.
 2018-04-06 15:44:49 -06:00
Tom Tromey
22bc8444e6 Introduce a gdb_ref_ptr specialization for struct value 
struct value is internally reference counted and so, while it also has
some ownership rules unique to it, it makes sense to use a gdb_ref_ptr
when managing it automatically.

This patch removes the existing unique_ptr specialization in favor of
a reference-counted pointer.  It also introduces two other
clarifications:

1. Rename value_free to value_decref, which I think is more in line
   with what the function actually does; and

2. Change release_value to return a gdb_ref_ptr.  This change allows
   us to remove the confusing release_value_or_incref function,
   primarily by making it much simpler to reason about the result of
   release_value.

gdb/ChangeLog
2018-04-06  Tom Tromey  <tom@tromey.com>

	* varobj.c (varobj_clear_saved_item)
	(update_dynamic_varobj_children, install_new_value, ~varobj):
	Update.
	* value.h (value_incref): Move declaration earlier.
	(value_decref): Rename from value_free.
	(struct value_ref_policy): New.
	(value_ref_ptr): New typedef.
	(struct value_deleter): Remove.
	(gdb_value_up): Remove typedef.
	(release_value): Change return type.
	(release_value_or_incref): Remove.
	* value.c (set_value_parent): Update.
	(value_incref): Change return type.
	(value_decref): Rename from value_free.
	(value_free_to_mark, free_all_values, free_value_chain): Update.
	(release_value): Return value_ref_ptr.
	(release_value_or_incref): Remove.
	(record_latest_value, set_internalvar, clear_internalvar):
	Update.
	* stack.c (info_frame_command): Don't call value_free.
	* python/py-value.c (valpy_dealloc, valpy_new)
	(value_to_value_object): Update.
	* printcmd.c (do_examine): Update.
	* opencl-lang.c (lval_func_free_closure): Update.
	* mi/mi-main.c (register_changed_p): Don't call value_free.
	* mep-tdep.c (mep_frame_prev_register): Don't call value_free.
	* m88k-tdep.c (m88k_frame_prev_register): Don't call value_free.
	* m68hc11-tdep.c (m68hc11_frame_prev_register): Don't call
	value_free.
	* guile/scm-value.c (vlscm_free_value_smob)
	(vlscm_scm_from_value): Update.
	* frame.c (frame_register_unwind, frame_unwind_register_signed)
	(frame_unwind_register_unsigned, get_frame_register_bytes)
	(put_frame_register_bytes): Don't call value_free.
	* findvar.c (address_from_register): Don't call value_free.
	* dwarf2read.c (dwarf2_compute_name): Don't call value_free.
	* dwarf2loc.c (entry_data_value_free_closure)
	(value_of_dwarf_reg_entry, free_pieced_value_closure)
	(dwarf2_evaluate_loc_desc_full): Update.
	* breakpoint.c (update_watchpoint, breakpoint_init_inferior)
	(~bpstats, bpstats, bpstat_clear_actions, watchpoint_check)
	(~watchpoint, watch_command_1)
	(invalidate_bp_value_on_memory_change): Update.
	* alpha-tdep.c (alpha_register_to_value): Don't call value_free.
 2018-04-06 15:44:46 -06:00
Tom Tromey
7c22600aab Initial support for variant parts 
This adds some initial support for variant parts to gdbtypes.h.  A
variant part is represented as a union.  The union has a flag
indicating that it has a discriminant, and information about the
discriminant is attached using the dynamic property system.

2018-02-26  Tom Tromey  <tom@tromey.com>

	* value.h (value_union_variant): Declare.
	* valops.c (value_union_variant): New function.
	* gdbtypes.h (TYPE_FLAG_DISCRIMINATED_UNION): New macro.
	(struct discriminant_info): New.
	(enum dynamic_prop_node_kind) <DYN_PROP_DISCRIMINATED>: New
	enumerator.
	(struct main_type) <flag_discriminated_union>: New field.
 2018-02-26 09:21:08 -07:00
Tom Tromey
3eac2b6548 Remove a cleanup from parse_expression_for_completion 
This removes a cleanup from parse_expression_for_completion, by
changing various expression-completion functions to use
gdb::unique_xmalloc_ptry rather than explicit malloc+free.

Regression tested by the buildbot.

gdb/ChangeLog
2018-02-21  Tom Tromey  <tom@tromey.com>

	* value.h: (extract_field_op): Update.
	* eval.c (extract_field_op): Return a const char *.
	* expression.h (parse_expression_for_completion): Update.
	* completer.c (complete_expression): Update.
	(add_struct_fields): Make fieldname const.
	* parse.c (expout_completion_name): Now a unique_xmalloc_ptr.
	(mark_completion_tag, parse_exp_in_context_1): Update.
	(parse_expression_for_completion): Change "name" to
	unique_xmalloc_ptr*.
 2018-02-21 09:09:45 -07:00
Simon Marchi
ba18742c3a C++ify xmethod_worker, get rid of VEC(xmethod_worker_ptr) 
The initial goal of this patch was to remove the usage of
VEC(xmethod_worker_ptr) and corresponding cleanups.  I ended up having
to  C++ify the xmethod_worker code, to be able to have xmethod_workers
free their data in destructors, and therefore be able to use vectors of
xmethod_worker unique_ptr.

The operations in extension_language_ops that act on one instance of
xmethod_worker (get result type, get args type, invoke) are transformed
to methods of xmethod_worker.  xmethod_worker becomes an abstract base
class with virtual pure methods which python_xmethod_worker implements.
The only xmethod-related operation left in extension_language_ops is
get_matching_xmethod_workers, which returns a list of xmethod_workers.

The changes are relatively straightforward, but here are some notes on
things that may raise eyebrows:

  - I was not really comfortable with the value_of_xmethod function.  At
  first it looks like a simple getter, so I considered making it a
  method of xmethod_worker.  But actually it creates a value and
  transfers the ownership of the xmethod_worker to it.  It would be a
  bit weird and error-prone if calling a method on an object silently
  removed the ownership of the object from the caller.  To reflect the
  behavior more accurately, I renamed it to value_from_xmethod and made
  it accept an rvalue-reference (so the caller knows it gives away the
  ownership).  I noticed the backlink from xmethod_worker to its owning
  value was not used, so I removed it.

  - Some code, like get_matching_xmethod_workers, made each callee fill
  a new vector, which was then merged in the result vector.  I think
  it's safe if we always pass the same vector around, and each
  implementation just appends to it.

  - The clone operation does not seem particularly useful, it is removed
  in the following patch.

gdb/ChangeLog:

	* extension-priv.h (enum ext_lang_rc): Remove, move to extension.h.
	(struct extension_language_ops) <clone_xmethod_worker_data>: Remove.
	<free_xmethod_worker_data>: Remove.
	<get_matching_xmethod_workers>: Chance VEC to std::vector.
	<get_xmethod_arg_types>: Remove.
	<get_xmethod_result_type>: Remove.
	<invoke_xmethod>: Remove.
	* extension.c (new_xmethod_worker): Remove.
	(clone_xmethod_worker): Remove.
	(get_matching_xmethod_workers): Return void, pass std::vector by
	pointer.
	(get_xmethod_arg_types): Rename to...
	(xmethod_worker::get_arg_types): ... this, and adjust.
	(get_xmethod_result_type): Rename to...
	(xmethod_worker::get_result_type): ... this, and adjust.
	(invoke_xmethod): Remove.
	(free_xmethod_worker): Remove.
	(free_xmethod_worker_vec): Remove.
	* extension.h (enum ext_lang_rc): Move here from
	extension-priv.h.
	(struct xmethod_worker): Add constructor and destructor.
	<data>: Remove.
	<value>: Remove.
	<invoke, clone, do_get_result_type, do_get_arg_types>: New
	virtual pure methods.
	<get_arg_types, get_result_type>: New methods.
	(xmethod_worker_ptr): Remove typedef.
	(DEF_VEC_P (xmethod_worker_ptr)): Remove.
	(xmethod_worker_vec): Remove typedef.
	(xmethod_worker_up): New typedef.
	(invoke_xmethod): Remove.
	(clone_xmethod_worker): Remove.
	(free_xmethod_worker): Remove.
	(free_xmethod_worker_vec): Remove.
	(get_xmethod_arg_types): Remove.
	(get_xmethod_result_type): Remove.
	* valops.c (find_method_list): Use std::vector, don't use
	intermediate vector.
	(value_find_oload_method_list): Use std::vector.
	(find_overload_match): Use std::vector.
	(find_oload_champ): Use std::vector.
	* value.c (value_free): Use operator delete.
	(value_of_xmethod): Rename to...
	(value_from_xmethod): ... this.  Don't assign
	xmethod_worker::value, take rvalue-reference.
	(result_type_of_xmethod): Adjust.
	(call_xmethod): Adjust.
	* value.h: Include extension.h.
	(struct xmethod_worker): Don't forward-declare.
	(value_of_xmethod): Rename to...
	(value_from_xmethod): ... this, take rvalue-reference.
	* python/py-xmethods.c (struct gdbpy_worker_data): Rename to...
	(struct python_xmethod_worker): ... this, add constructor and
	destructor.
	<invoke, clone, do_get_arg_types, do_get_result_type>: Implement.
	(gdbpy_free_xmethod_worker_data): Rename to...
	(python_xmethod_worker::~python_xmethod_worker): ... this and
	adjust.
	(gdbpy_clone_xmethod_worker_data): Rename to...
	(python_xmethod_worker::clone): ... this and adjust.
	(gdbpy_get_matching_xmethod_workers): Use std::vector, don't use
	temporary vector.
	(gdbpy_get_xmethod_arg_types): Rename to...
	(python_xmethod_worker::do_get_arg_types): ... this and adjust.
	(gdbpy_get_xmethod_result_type): Rename to...
	(python_xmethod_worker::do_get_result_type): ... this and
	adjust.
	(gdbpy_invoke_xmethod): Rename to...
	(python_xmethod_worker::invoke): ... this and adjust.
	(new_python_xmethod_worker): Rename to...
	(python_xmethod_worker::python_xmethod_worker): ... this and
	adjust.
	* python/python-internal.h (gdbpy_clone_xmethod_worker_data):
	Remove.
	(gdbpy_free_xmethod_worker_data): Remove.
	(gdbpy_get_matching_xmethod_workers): Use std::vector.
	(gdbpy_get_xmethod_arg_types): Remove.
	(gdbpy_get_xmethod_result_type): Remove.
	(gdbpy_invoke_xmethod): Remove.
	* python/python.c (python_extension_ops): Remove obsolete
	callbacks.
 2018-01-07 09:25:32 -05:00
Joel Brobecker
e2882c8578 Update copyright year range in all GDB files 
gdb/ChangeLog:

        Update copyright year range in all GDB files
 2018-01-02 07:38:06 +04:00
Yao Qi
98ead37e97 Change value_contents_eq return bool 
This patch changes value_contents_eq return type from int to bool.

gdb:

2017-11-24  Yao Qi  <yao.qi@linaro.org>

	* mi/mi-main.c (register_changed_p): Update.
	* value.c (value_contents_bits_eq): Change return type.
	(value_contents_eq): Likewise.
	* value.h: Update comments.
 2017-11-24 10:47:27 +00:00
Joel Brobecker
ced9779b4c (Ada) fix handling of minimal symbols (UNOP_CAST and UNOP_ADDR) 
Consider a program which provides a symbol without debugging
information. For instance, compiling the following code without -g:

    Some_Minimal_Symbol : Integer := 1234;
    pragma Export (C, Some_Minimal_Symbol, "some_minsym");

Trying to print this variable with GDB now causes an error, which
is now expected:

    (gdb) p some_minsym
    'some_minsym' has unknown type; cast it to its declared type

However, trying to cast this symbol, or to take its address
does not work:

    (gdb) p integer(some_minsym)
    'some_minsym' has unknown type; cast it to its declared type
    (gdb) p &some_minsym
    'some_minsym' has unknown type; cast it to its declared type

Another manisfestation of this issue can be seen when trying to
insert an Ada exception catchpoint for a specific standard exception
(this only occurs if the Ada runtime is built without debugging
information, which is the default).  For instance:

    $ (gdb) catch exception constraint_error
    warning: failed to reevaluate internal exception condition for catchpoint 0: 'constraint_error' has unknown type; cast it to its declared type

This is because, internally, the cachtpoint uses a condition referencing
a minimal symbol, more precisely:

   long_integer (e) = long_integer (&constraint_error)

This patch fixes all issues listed above:

  1. resolve_subexp: Special-case the handling of OP_VAR_MSYM_VALUE
     expression elements, where there are no ambiguities to be resolved
     in that situation;

  2. ada_evaluate_subexp: Enhance the handling of the UNOP_CAST
     handling so as to process the case where the target of
     the cast is a minimal symbol (as well as a symbol with debugging
     information). This mimics what's done in C.

gdb/ChangeLog:

        * ada-lang.c (resolve_subexp): Add handling of OP_VAR_MSYM_VALUE.
        (ada_evaluate_subexp_for_cast): New function.
        (ada_evaluate_subexp) <UNOP_CAST>: Replace code by call to
        ada_evaluate_subexp_for_cast.
        (ada_evaluate_subexp) <nosideret>: Replace code by call to
        eval_skip_value.
        * eval.c (evaluate_var_value): Make non-static.
        (evaluate_var_msym_value, eval_skip_value): Likewise.
        * value.h (evaluate_var_value, evaluate_var_msym_value)
        (eval_skip_value): Declare.

gdb/testsuite/ChangeLog:

        * gdb.ada/minsyms: New testcase.

Tested on x86_64-linux. No regression. Fixes the following failures:

    catch_ex.exp: continuing to Program_Error exception
    catch_ex.exp: continuing to failed assertion
    catch_ex.exp: continuing to unhandled exception
    catch_ex.exp: continuing to program completion
    complete.exp: p <Exported_Capitalized>
    complete.exp: p Exported_Capitalized
    complete.exp: p exported_capitalized
    mi_catch_ex.exp: catch Program_Error (unexpected output)
    mi_catch_ex.exp: continue to exception catchpoint hit (unknown output after running)
    mi_catch_ex.exp: continue to assert failure catchpoint hit (unknown output after running)
    mi_catch_ex.exp: continue to unhandled exception catchpoint hit (unknown output after running)
    mi_ex_cond.exp: catch C_E if i = 2 (unexpected output)
 2017-11-17 12:45:43 -05:00
Ulrich Weigand
b07e9c466e Target FP: Remove unused floating-point routines 
This patch removes the following routines, which now have no remaining
users in GDB:
 - extract_typed_floating
 - store_typed_floating
 - convert_typed_floating
 - decimal_from_doublest
 - decimal_to_doublest
 - value_as_double
 - unpack_double
 - value_from_double
 - value_from_decfloat

This completes removal of DOUBLEST from all files except doublest.{c,h}
and target-float.c.

gdb/ChangeLog:
2017-11-06  Ulrich Weigand  <uweigand@de.ibm.com>

	* doublest.c: Do not include "gdbtypes.h".
	(extract_typed_floating): Remove.
	(store_typed_floating): Remove.
	(convert_typed_floating): Remove.
	* doublest.h (struct type): Remove.
	(DOUBLEST_PRINT_FORMAT): Remove.
	(DOUBLEST_SCAN_FORMAT): Remove.
	(extract_typed_floating): Remove.
	(store_typed_floating): Remove.
	(convert_typed_floating): Remove.

	* dfp.c (decimal_from_doublest): Remove.
	(decimal_to_doublest): Remove.
	* dfp.h: Do not include "doublest.h".
	(decimal_from_doublest): Remove.
	(decimal_to_doublest): Remove.

	* value.c: Do not include "doublest.h" and "dfp.h".
	(value_as_double): Remove.
	(unpack_double): Remove.
	(value_from_double): Remove.
	(value_from_decfloat): Remove.
	* value.h: Do not include "doublest.h".
	(value_as_double): Remove.
	(unpack_double): Remove.
	(value_from_double): Remove.
	(value_from_decfloat): Remove.
 2017-11-06 16:02:33 +01:00
Ulrich Weigand
701000146a Target FP: Introduce target-float.{c,h} 
This patch introduces the new set of target floating-point handling routines
in target-float.{c,h}.  In the end, the intention is that this file will
contain support for all operations in target FP format, fully replacing
both the current doublest.{c,h} and dfp.{c,h}.

To begin with, this patch only adds a target_float_is_zero routine,
which handles the equivalent of decimal_is_zero for both binary and
decimal FP.  For the binary case, to avoid conversion to DOUBLEST,
this is implemented using the floatformat_classify routine.

However, it turns out that floatformat_classify actually has a bug
(it was not used to check for zero before), so this is fixed as well.

The new routine is used in both value_logical_not and valpy_nonzero.

There is one extra twist: the code previously used value_as_double
to convert to DOUBLEST and then compare against zero.  That routine
performs an extra task: it detects invalid floating-point values
and raises an error.  In any place where value_as_double is removed
in favor of some target-float.c routine, we need to replace that check.

To keep this check centralized in one place, I've added a new routine
is_floating_value, which returns a boolean determining whether a
value's type is floating point (binary or decimal), and if so, also
performs the validity check.  Since we need to check whether a value
is FP before calling any of the target-float routines anyway, this
seems a good place to add the check without much code size overhead.

In some places where we only want to check for floating-point types
and not perform a validity check (e.g. for the *output* of an operation),
we can use the new is_floating_type routine (in gdbarch) instead.

The validity check itself is done by a new target_float_is_valid
routine in target-float, encapsulating floatformat_is_valid.

ChangeLog:
2017-11-06  Ulrich Weigand  <uweigand@de.ibm.com>

	* Makefile.c (SFILES): Add target-float.c.
	(HFILES_NO_SRCDIR): Add target-float.h.
	(COMMON_OBS): Add target-float.o.
	* target-float.h: New file.
	* target-float.c: New file.

	* doublest.c (floatformat_classify): Fix detection of float_zero.

	* gdbtypes.c (is_floating_type): New function.
	* gdbtypes.h (is_floating_type): Add prototype.

	* value.c: Do not include "floatformat.h".
	(unpack_double): Use target_float_is_valid.
	(is_floating_value): New function.
	* value.h (is_floating_value): Add prototype-

	* valarith.c: Include "target-float.h".
	(value_logical_not): Use target_float_is_zero.

	* python/py-value.c: Include "target-float.h".
	(valpy_nonzero): Use target_float_is_zero.
 2017-11-06 15:56:02 +01:00
Ulrich Weigand
fdf0cbc2b7 Target FP printing: Simplify and fix print_floating 
The print_floating routine currently makes a lot of assumptions about host
and target floating point formats.  This patch cleans up many of those.

One problem is that print_floating may currently be called with types
that are not actually floating-point types, and it tries hard to output
those as floating-point values anyway.  However, there is only one single
caller of print_floating where this can ever happen: print_scalar_formatted.
And in fact, it is much simpler to handle the case where the value to be
printed is not already of floating-point type right there.

So this patch changes print_scalar_formatted to handle the 'f' format
as follows:

- If the value to be printed is already of floating-point type, just
  call print_floating on it.

- Otherwise, if there is a standard target floating-point type of
  the same size as the value, call print_floating using that type.

- Otherwise, just print the value as if the 'f' format had not been
  specified at all.

This has the overall effect to printing everything the same way as
the old code did, but is overall a lot simpler.  (Also, it would
allow us to change the above strategy more easily, if that might
be a more intuitive user interface.  For example, in the third
case above, maybe an error would be more appropriate?)

Given that change, print_floating can become much simpler.  In particular,
we now always have a floating-point format that we can consult.  This
means we can use the floating-point format to programmatically determine
the number of digits necessary to print the value.

The current code uses a hard-coded value of 9, 17, or 35 digits.  Note
that this matches the DECIMAL_DIG values for IEEE-32, IEEE-64, and
IEEE-128.  (Actually, for IEEE-128 the correct value is 36 -- the 35
seems to be an oversight.)  The DECIMAL_DIG value is defined to be
the smallest number so that any number in the target format, when
printed to this number of digits and then scanned back into a binary
floating-point number, will result in the original value.

Now that we always have a FP format, we can just compute the DECIMAL_DIG
value using the formula from the C standard.  This will be correct for
*all* FP formats, not just the above list, and it will be correct (as
opposed to current code) if the target formats differ from the host ones.

The patch moves the new logic to a new floatformat_to_string routine
(analogous to the existing decimal_to_string).  The print_floating
routine now calls floatformat_to_string or decimal_to_string, making
the separate print_decimal_floating and generic_val_print_decfloat routines
unnecessary.

gdb/ChangeLog:
2017-10-24  Ulrich Weigand  <uweigand@de.ibm.com>

	* doublest.c (floatformat_precision): New routine.
	(floatformat_to_string): Likewise.
	* doublest.c (floatformat_to_string): Add prototype.

	* printcmd.c (print_scalar_formatted): Only call print_floating
	on floating-point types.
	* valprint.c: Do not include "floatformat.h".
	(generic_val_print_decfloat): Remove.
	(generic_val_print): Call generic_val_print_float for both
	TYPE_CODE_FLT and TYPE_CODE_DECFLOAT.
	(print_floating): Use floatformat_to_string.  Handle decimal float.
	(print_decimal_floating): Remove, merge into floatformat_to_string.
	* value.h (print_decimal_floating): Remove.

	* Makefile.in: Do not build doublest.c with -Wformat-nonliteral.
 2017-10-24 17:59:22 +02:00
Tom Tromey
54f70bc145 Remove cleanups from prepare_execute_command 
This changes prepare_execute_command to return a scoped_value_mark
rather than a cleanup.

ChangeLog
2017-10-19  Tom Tromey  <tom@tromey.com>

	* mi/mi-main.c (mi_cmd_execute): Update.
	* top.h (prepare_execute_command): Return scoped_value_mark.
	* value.h (class scoped_value_mark): Use DISABLE_COPY_AND_ASSIGN.
	Add move constructor.
	* top.c (prepare_execute_command): Return scoped_value_mark.
	(execute_command): Update.
 2017-10-19 15:58:11 -06:00
Tom Tromey
757325a3f2 Remove make_cleanup_value_free 
This removes make_cleanup_value_free, in favor of a unique_ptr
specialization.

Regression tested by the buildbot.

gdb/ChangeLog
2017-10-08  Tom Tromey  <tom@tromey.com>

	* utils.h (make_cleanup_value_free): Remove.
	* utils.c (do_value_free, struct cleanup): Remove.
	* dwarf2loc.c (dwarf2_evaluate_loc_desc_full) <DWARF_VALUE_STACK>:
	Use gdb_value_up.
	* value.h (struct value_deleter): New.
	(gdb_value_up): New typedef.
 2017-10-08 23:07:37 -06:00
Pedro Alves
eb3ff9a551 Introduce class completion_tracker & rewrite completion<->readline interaction 
This patch reworks the whole completion machinery, and prepares it
for later enhancements.

Adds a new "completion_tracker" class that is meant to hold everything
about the state of the current completion operation.

This class now has the responsibility of tracking the list of
completion matches, and checking whether the max completions limit has
been reached.  You can look at this as this patch starting out by
C++fying the existing "completion_tracker" in symtab.c (it's just an
htab_t typedef currently), moving it to completer.h/c, and then making
it a class/generalizing/enhancing it.

Unlike with the current tracking, completion_tracker now checks
whether the limit has been reached on each completion match list
insertion.  This both simplifies the max-completions handling code
(maybe_add_completion_enum is gone, for example), and is a
prerequisite for follow up patches.

The current completion_tracker is only used for symbol completions,
and the symbol code gets at the current instance via globals.  This
patch cleans that up by adding a completion_tracker reference to the
signature of the completion functions, and passing the tracker around
everywhere necessary.

Then, the patch changes how the completion match list is handed over
to readline.  Currently, we're using the rl_completion_entry_function
readline entry point, and the patch switches to
rl_attempted_completion_function.  A following patch will want to let
GDB itself decide the common completion prefix between all matches
(what readline calls the "lowest common denominator"), instead of
having readline compute it, and that's not possible with the
rl_completion_entry_function entry point.  Also,
rl_attempted_completion_function lets GDB hand over the match list to
readline as an array in one go instead of passing down matches one by
one, so from that angle it's a nicer entry point anyway.

Lastly, the patch catches exceptions around the readline entry points,
because we can't let C++ exceptions cross readline.  We handle that in
the readline input entry point, but the completion entry point isn't
guarded, so GDB can abort if completion throws.  E.g., in current
master:

 (gdb) b -function "fun<tab>
 terminate called after throwing an instance of 'gdb_exception_RETURN_MASK_ERROR'
 Aborted (core dumped)

This patch fixes that.  This will be exercised in the new tests added
later on in the series.

gdb/ChangeLog:
2017-07-17  Pedro Alves  <palves@redhat.com>

	* ada-lang.c (symbol_completion_match): Adjust comments.
	(symbol_completion_add): Replace vector parameter with
	completion_tracker parameter.  Use it.
	(ada_make_symbol_completion_list): Rename to...
	(ada_collect_symbol_completion_matches): ... this.  Add
	completion_tracker parameter and use it.
	(ada_language_defn): Adjust.
	* break-catch-syscall.c (catch_syscall_completer): Adjust
	prototype and work with completion_tracker instead of VEC.
	* breakpoint.c (condition_completer): Adjust prototype and work
	with completion_tracker instead of VEC.
	* c-lang.c (c_language_defn, cplus_language_defn)
	(asm_language_defn, minimal_language_defn): Adjust to renames.
	* cli/cli-cmds.c (complete_command): Rework using
	completion_tracker.  Catch exceptions when completing.
	* cli/cli-decode.c (integer_unlimited_completer)
	(complete_on_cmdlist, complete_on_enum): Adjust prototype and work
	with completion_tracker instead of VEC.
	* command.h (struct completion_tracker): Forward declare.
	(completer_ftype, completer_handle_brkchars_ftype): Change
	types.
	(complete_on_cmdlist, complete_on_enum): Adjust.
	* completer.c: Include <algorithm>.
	(struct gdb_completer_state): New.
	(current_completion): New global.
	(readline_line_completion_function): Delete.
	(noop_completer, filename_completer)
	(filename_completer_handle_brkchars, complete_files_symbols)
	(linespec_location_completer): Adjust to work with a
	completion_tracker instead of a VEC.
	(string_or_empty): New.
	(collect_explicit_location_matches): Adjust to work with a
	completion_tracker instead of a VEC.
	(explicit_location_completer): Rename to ...
	(complete_explicit_location): ... this and adjust to work with a
	completion_tracker instead of a VEC.
	(location_completer): Adjust to work with a completion_tracker
	instead of a VEC.
	(add_struct_fields): Adjust to work with a completion_list instead
	of VEC.
	(expression_completer): Rename to ...
	(complete_expression): ... this and adjust to work with a
	completion_tracker instead of a VEC.  Use complete_files_symbols.
	(expression_completer): Reimplement on top of complete_expression.
	(symbol_completer): Adjust to work with a completion_tracker
	instead of a VEC.
	(enum complete_line_internal_reason): Add describing comments.
	(complete_line_internal_normal_command): Adjust to work with a
	completion_tracker instead of a VEC.
	(complete_line_internal): Rename to ...
	(complete_line_internal_1): ... this and adjust to work with a
	completion_tracker instead of a VEC.  Assert TEXT is NULL in the
	handle_brkchars phase.
	(new_completion_tracker): Delete.
	(complete_line_internal): Reimplement as TRY/CATCH wrapper around
	complete_line_internal_1.
	(free_completion_tracker): Delete.
	(INITIAL_COMPLETION_HTAB_SIZE): New.
	(completion_tracker::completion_tracker)
	(completion_tracker::~completion_tracker): New.
	(maybe_add_completion): Delete.
	(completion_tracker::maybe_add_completion)
	(completion_tracker::add_completion)
	(completion_tracker::add_completions): New.
	(throw_max_completions_reached_error): Delete.
	(complete_line): Adjust to work with a completion_tracker instead
	of a VEC.  Don't create a completion_tracker_t or check for max
	completions here.
	(command_completer, command_completer_handle_brkchars)
	(signal_completer, reg_or_group_completer_1)
	(reg_or_group_completer, default_completer_handle_brkchars):
	Adjust to work with a completion_tracker.
	(gdb_completion_word_break_characters_throw): New.
	(gdb_completion_word_break_characters): Reimplement.
	(line_completion_function): Delete.
	(completion_tracker::recompute_lowest_common_denominator)
	(expand_preserving_ws)
	(completion_tracker::build_completion_result)
	(completion_result::completion_result)
	(completion_result::completion_result)
	(completion_result::~completion_result)
	(completion_result::completion_result)
	(completion_result::release_match_list, compare_cstrings)
	(completion_result::sort_match_list)
	(completion_result::reset_match_list)
	(gdb_rl_attempted_completion_function_throw)
	(gdb_rl_attempted_completion_function): New.
	* completer.h (completion_list, struct completion_result)
	(class completion_tracker): New.
	(complete_line): Add completion_tracker parameter.
	(readline_line_completion_function): Delete.
	(gdb_rl_attempted_completion_function): New.
	(noop_completer, filename_completer, expression_completer)
	(location_completer, symbol_completer, command_completer)
	(signal_completer, reg_or_group_completer): Update prototypes.
	(completion_tracker_t, new_completion_tracker)
	(make_cleanup_free_completion_tracker): Delete.
	(enum maybe_add_completion_enum): Delete.
	(maybe_add_completion): Delete.
	(throw_max_completions_reached_error): Delete.
	* corefile.c (complete_set_gnutarget): Adjust to work with a
	completion_tracker instead of a VEC.
	* cp-abi.c (cp_abi_completer): Adjust to work with a
	completion_tracker instead of a VEC.
	* d-lang.c (d_language_defn): Adjust.
	* disasm.c (disassembler_options_completer): Adjust to work with a
	completion_tracker instead of a VEC.
	* f-lang.c (f_make_symbol_completion_list): Rename to ...
	(f_collect_symbol_completion_matches): ... this.  Adjust to work
	with a completion_tracker instead of a VEC.
	(f_language_defn): Adjust.
	* go-lang.c (go_language_defn): Adjust.
	* guile/scm-cmd.c (cmdscm_add_completion, cmdscm_completer):
	Adjust to work with a completion_tracker instead of a VEC.
	* infrun.c (handle_completer): Likewise.
	* interps.c (interpreter_completer): Likewise.
	* interps.h (interpreter_completer): Likewise.
	* language.c (unknown_language_defn, auto_language_defn)
	(local_language_defn): Adjust.
	* language.h (language_defn::la_make_symbol_completion_list):
	Rename to ...
	(language_defn::la_collect_symbol_completion_matches): ... this
	and adjust to work with a completion_tracker instead of a VEC.
	* m2-lang.c (m2_language_defn): Adjust.
	* objc-lang.c (objc_language_defn): Adjust.
	* opencl-lang.c (opencl_language_defn): Adjust.
	* p-lang.c (pascal_language_defn): Adjust.
	* python/py-cmd.c (cmdpy_completer_helper): Handle NULL word.
	(cmdpy_completer_handle_brkchars, cmdpy_completer): Adjust to work
	with a completion_tracker.
	* rust-lang.c (rust_language_defn): Adjust.
	* symtab.c (free_completion_list, do_free_completion_list)
	(return_val, completion_tracker): Delete.
	(completion_list_add_name, completion_list_add_symbol)
	(completion_list_add_msymbol, completion_list_objc_symbol)
	(completion_list_add_fields, add_symtab_completions): Add
	completion_tracker parameter and use it.
	(default_make_symbol_completion_list_break_on_1): Rename to...
	(default_collect_symbol_completion_matches_break_on): ... this.
	Add completion_tracker parameter and use it instead of allocating
	a completion tracker here.
	(default_make_symbol_completion_list_break_on): Delete old
	implementation.
	(default_make_symbol_completion_list): Delete.
	(default_collect_symbol_completion_matches): New.
	(make_symbol_completion_list): Delete.
	(collect_symbol_completion_matches): New.
	(make_symbol_completion_type): Rename to ...
	(collect_symbol_completion_matches_type): ... this.  Add
	completion_tracker parameter and use it instead of VEC.
	(make_file_symbol_completion_list_1): Rename to...
	(collect_file_symbol_completion_matches): ... this.  Add
	completion_tracker parameter and use it instead of VEC.
	(make_file_symbol_completion_list): Delete.
	(add_filename_to_list): Use completion_list instead of a VEC.
	(add_partial_filename_data::list): Now a completion_list.
	(make_source_files_completion_list): Work with a completion_list
	instead of a VEC.
	* symtab.h: Include "completer.h".
	(default_make_symbol_completion_list_break_on)
	(default_make_symbol_completion_list, make_symbol_completion_list)
	(make_symbol_completion_type, make_file_symbol_completion_list)
	(make_source_files_completion_list): Delete.
	(default_collect_symbol_completion_matches_break_on)
	(default_collect_symbol_completion_matches)
	(collect_symbol_completion_matches)
	(collect_symbol_completion_matches_type)
	(collect_file_symbol_completion_matches)
	(make_source_files_completion_list): New.
	* top.c (init_main): Don't install a rl_completion_entry_function
	hook.  Install a rl_attempted_completion_function hook instead.
	* tui/tui-layout.c (layout_completer): Adjust to work with a
	completion_tracker.
	* tui/tui-regs.c (tui_reggroup_completer):
	* tui/tui-win.c (window_name_completer, focus_completer)
	(winheight_completer): Adjust to work with a completion_tracker.
	* value.c: Include "completer.h".
	(complete_internalvar): Adjust to work with a completion_tracker.
	* value.h (complete_internalvar): Likewise.
 2017-07-17 14:45:59 +01:00
Andreas Arnez
23f945bf8c Fix bit-/byte-offset mismatch in parameter to read_value_memory 
The function read_value_memory accepts a parameter embedded_offset and
expects it to represent the byte offset into the given value.  However,
the only invocation with a possibly non-zero embedded_offset happens in
read_pieced_value, where a bit offset is passed instead.

Adjust the implementation of read_value_memory to meet the caller's
expectation.  This implicitly fixes the invocation in read_pieced_value.

gdb/ChangeLog:

	* valops.c (read_value_memory): Change embedded_offset to
	represent a bit offset instead of a byte offset.
	* value.h (read_value_memory): Adjust comment.
 2017-06-13 15:20:31 +02:00
Artemiy Volkov
a65cfae5f8 Add ability to return rvalue reference values from value_ref 
Parameterize value_ref() by the kind of reference type the value of which
is requested. Change all callers to use the new API.

gdb/ChangeLog

	PR gdb/14441
	* ada-lang.c (ada_evaluate_subexp): Adhere to the new
	value_ref() interface.
	* c-valprint.c (c_value_print): Likewise.
	* infcall.c (value_arg_coerce): Likewise.
	* python/py-value.c (valpy_reference_value): Likewise.
	* valops.c (value_cast, value_reinterpret_cast)
	(value_dynamic_cast, typecmp): Likewise.
	(value_ref): Parameterize by kind of return value reference type.
	* value.h (value_ref): Add new parameter "refcode".
 2017-03-20 13:47:41 -07:00
Tom Tromey
0cf0822778 Use scoped_value_mark in dwarf2_evaluate_loc_desc_full 
This changes dwarf2_evaluate_loc_desc_full to use scoped_value_mark.

Note that this function previously called do_cleanup using the same
cleanup multiple times.  I had thought this was buggy, but re-reading
make_my_cleanup2 indicates that it is not.  Nevertheless it is
surprising, and at least one of the calls (the one that is completely
removed in this patch) seems to have been done under the assumption
that it would still have some effect.

2017-01-10  Tom Tromey  <tom@tromey.com>

	* value.h (scoped_value_mark::~scoped_value_mark): Call
	free_to_mark.
	(scoped_value_mark::free_to_mark): New method.
	* dwarf2loc.c (dwarf2_evaluate_loc_desc_full): Use
	scoped_value_mark.
 2017-01-10 19:14:13 -07:00
Tom Tromey
eb11506932 Add scoped_value_mark 
This adds a scoped_value_mark class, that records the value mark in
the constructor and then calls value_free_to_mark in the destructor.
It then updates various spots in gdb to use this class, rather than a
cleanup.

It would be better overall to replace "struct value *" with a
shared_ptr, maybe eliminating the need for this class (watchpoints
would perhaps need some new mechanism as well).  However, that's
difficult to do.

2017-01-10  Tom Tromey  <tom@tromey.com>

	* python/py-value.c (valpy_dereference, valpy_referenced_value)
	(valpy_reference_value, valpy_const_value, valpy_get_address)
	(valpy_get_dynamic_type, valpy_lazy_string, valpy_do_cast)
	(valpy_getitem, valpy_call, valpy_binop_throw, valpy_negative)
	(valpy_absolute, valpy_richcompare_throw): Use scoped_value_mark.
	* dwarf2loc.c (dwarf2_loc_desc_get_symbol_read_needs): Use
	scoped_value_mark.
	* dwarf2-frame.c (execute_stack_op): Use scoped_value_mark.
	* value.h (scoped_value_mark): New class.
 2017-01-10 19:14:12 -07:00
Joel Brobecker
61baf725ec update copyright year range in GDB files 
This applies the second part of GDB's End of Year Procedure, which
updates the copyright year range in all of GDB's files.

gdb/ChangeLog:

        Update copyright year range in all GDB files.
 2017-01-01 10:52:34 +04:00
Yao Qi
7dc54575d9 Adjust Value.location for lval_register 
value.regnum and value.next_frame_id are only used for lval_register,
so this patch moves them to union value.location.  As a result, when
we copy value, only copy location, don't need to copy regnum and
next_frame_id.

This patch also changes regnum's type to int as there is no space
constraint, so update deprecated_value_regnum_hack return type too.

gdb:

2016-11-28  Yao Qi  <yao.qi@linaro.org>

	* valops.c (value_slice): Don't set frame id of slice.
	* value.c (struct value) <regnum, next_frame_id>: Move them to...
	(struct value) <location>: ... here.  Update comments.
	(allocate_value_lazy): Don't set frame id and regnum.
	(deprecated_value_next_frame_id_hack): Adjust.
	(deprecated_value_regnum_hack): Adjust.
	(value_copy): Don't copy frame id and regnu.
	(value_primitive_field): Likewise.
	(value_from_component): Likewise.
	(deprecated_value_regnum_hack): Return int *.
	* value.h (deprecated_value_regnum_hack): Update declaration.
 2016-11-28 17:09:26 +00:00
Yao Qi
3fff9862d5 Create subobject value in pretty printer 
Nowadays, we create a value of subobject in pretty printer with 'address'
being used,

  value = value_from_contents_and_address (type, valaddr + embedded_offset,
					   address + embedded_offset);

  set_value_component_location (value, val);
  /* set_value_component_location resets the address, so we may
     need to set it again.  */
  if (VALUE_LVAL (value) != lval_internalvar
      && VALUE_LVAL (value) != lval_internalvar_component
      && VALUE_LVAL (value) != lval_computed)
    set_value_address (value, address + embedded_offset);

value_from_contents_and_address creates a value from memory, but the
value we are pretty-printing may not from memory at all.

Instead of using value_from_contents_and_address, we create a value
of subobject with the same location as object's but different offset.
We avoid using address in this way.  As a result, parameter 'address'
in apply_val_pretty_printer is no longer needed, we can remove it in
next step.

We've already had the location of the 'whole' value, so it is safe
to assume we can create a value of 'component' or 'suboject' value
at the same location but with different offset.

gdb:

2016-11-21  Yao Qi  <yao.qi@linaro.org>

	* guile/scm-pretty-print.c (gdbscm_apply_val_pretty_printer):
	Don't call value_from_contents_and_address and
	set_value_address.  Call value_from_component.
	* python/py-prettyprint.c (gdbpy_apply_val_pretty_printer):
	Likewise.
	* value.c (value_from_component): New function.
	* value.h (value_from_component): Likewise.
	* valarith.c (value_subscripted_rvalue): Call
	value_from_component.
 2016-11-21 14:15:06 +00:00
Kevin Buettner
41b56feb50 Change meaning of VALUE_FRAME_ID; rename to VALUE_NEXT_FRAME_ID 
The VALUE_FRAME_ID macro provides access to a member in struct value
that's used to hold the frame id that's used when determining a
register's value or when assigning to a register.  The underlying
member has a long and obscure name.  I won't refer to it here, but
will simply refer to VALUE_FRAME_ID as if it's the struct value member
instead of being a convenient macro.

At the moment, without this patch in place, VALUE_FRAME_ID is set in
value_of_register_lazy() and several other locations to hold the frame
id of the frame passed to those functions.

VALUE_FRAME_ID is used in the lval_register case of
value_fetch_lazy().  To fetch the register's value, it calls
get_frame_register_value() which, in turn, calls
frame_unwind_register_value() with frame->next.

A python based unwinder may wish to determine the value of a register
or evaluate an expression containing a register.  When it does this,
value_fetch_lazy() will be called under some circumstances.  It will
attempt to determine the frame id associated with the frame passed to
it.  In so doing, it will end up back in the frame sniffer of the very
same python unwinder that's attempting to learn the value of a
register as part of the sniffing operation.  This recursion is not
desirable.

As noted above, when value_fetch_lazy() wants to fetch a register's
value, it does so (indirectly) by unwinding from frame->next.

With this in mind, a solution suggests itself:  Change VALUE_FRAME_ID
to hold the frame id associated with the next frame.  Then, when it
comes time to obtain the value associated with the register, we can
simply unwind from the frame corresponding to the frame id stored in
VALUE_FRAME_ID.  This neatly avoids the python unwinder recursion
problem by changing when the "next" operation occurs.  Instead of the
"next" operation occuring when the register value is fetched, it
occurs earlier on when assigning a frame id to VALUE_FRAME_ID.
(Thanks to Pedro for this suggestion.)

This patch implements this idea.

It builds on the patch "Distinguish sentinel frame from null frame".
Without that work in place, it's necessary to check for null_id at
several places and then obtain the sentinel frame.

It also renames most occurences of VALUE_FRAME_ID to
VALUE_NEXT_FRAME_ID to reflect the new meaning of this field.

There are several uses of VALUE_FRAME_ID which were not changed.  In
each case, the original meaning of VALUE_FRAME_ID is required to get
correct results.  In all but one of these uses, either
put_frame_register_bytes() or get_frame_register_bytes() is being
called with the frame value obtained from VALUE_FRAME_ID.  Both of
these functions perform some unwinding by performing a "->next"
operation on the frame passed to it.  If we were to use the new
VALUE_NEXT_FRAME_ID macro, this would effectively do two "->next"
operations, which is not what we want.

The VALUE_FRAME_ID macro has been redefined in terms of
VALUE_NEXT_FRAME_ID.  It simply fetches the previous frame's id,
providing this id as the value of the macro.

gdb/ChangeLog:

	* value.h (VALUE_FRAME_ID): Rename to VALUE_NEXT_FRAME_ID. Update
	comment.  Create new VALUE_FRAME_ID which is defined in terms of
	VALUE_NEXT_FRAME_ID.
	(deprecated_value_frame_id_hack): Rename to
	deprecated_value_next_frame_id_hack.
	* dwarf2loc.c, findvar.c, frame-unwind.c, sentinel-frame.c,
	valarith.c, valops.c, value.c: Adjust nearly all occurences of
	VALUE_FRAME_ID to VALUE_NEXT_FRAME_ID.	Add comments for those
	which did not change.
	* value.c (struct value): Rename frame_id field to next_frame_id.
	Update comment.
	(deprecated_value_frame_id_hack): Rename to
	deprecated_value_next_frame_id_hack.
	(value_fetch_lazy): Call frame_unwind_register_value()
	instead of get_frame_register_value().
	* frame.c (get_prev_frame_id_by_id): New function.
	* frame.h (get_prev_frame_id_by_id): Declare.
	* dwarf2loc.c (dwarf2_evaluate_loc_desc_full): Make
	VALUE_NEXT_FRAME_ID refer to the next frame.
	* findvar.c (value_of_register_lazy): Likewise.
	(default_value_from_register): Likewise.
	(value_from_register): Likewise.
	* frame_unwind.c (frame_unwind_got_optimized): Likewise.
	* sentinel-frame.c (sentinel_frame_prev_register): Likewise.
	* value.h (VALUE_FRAME_ID): Update comment describing this macro.
 2016-11-16 11:38:19 -07:00
Yao Qi
e8b24d9ff5 Remove parameter valaddr from la_val_print 
Nowadays, we pass both val and return value of
value_contents_for_printing (val) to la_val_print.  The latter is
unnecessary.  This patch removes the second parameter of la_val_print,
and get valaddr in each language's implementation by calling
value_contents_for_printing.  Since value_contents_for_printing calls
value_fetch_lazy, I also make VAL non-const.

Note that
 - I don't clean up the valaddr usages in each language's routines,
 - I don't remove valaddr from apply_ext_lang_val_pretty_printer, and
   extension language ops apply_val_pretty_printer.

They can be done in followup patches.

gdb:

2016-11-08  Yao Qi  <yao.qi@linaro.org>

	* ada-lang.h (ada_val_print): Remove second parameter.  Remove
	const from "struct value *".
	* ada-valprint.c (print_field_values): Remove const from
	"struct value *".
	(val_print_packed_array_elements): Likewise.
	(print_variant_part): Likewise.
	(ada_val_print_string): Likewise.
	(ada_val_print_gnat_array): Likewise.
	(ada_val_print_ptr): Likewise.
	(ada_val_print_num): Likewise.
	(ada_val_print_enum): Likewise.
	(ada_val_print_flt): Likewise.
	(ada_val_print_union): Likewise.
	(ada_val_print_struct_union): Likewise.
	(ada_val_print_ref): Likewise.
	(ada_val_print_1): Remove second parameter.  Remove const from
	"struct value *".
	(ada_val_print): Likewise.
	* c-lang.h (c_val_print): Likewise.
	* c-valprint.c (c_val_print_array): Remove const from
	"struct value *".
	(c_val_print_ptr): Likewise.
	(c_val_print_struct): Likewise.
	(c_val_print_union): Likewise.
	(c_val_print_int): Likewise.
	(c_val_print_memberptr): Likewise.
	(c_val_print): Remove second parameter.  Remove const from
	"struct value *".  All callers updated.
	* cp-valprint.c (cp_print_value): Remove const from
	"struct value *".
	(cp_print_value_fields): Likewise.
	(c_val_print_value): Likewise.
	* d-lang.h (d_val_print): Remove second parameter.  Remove const
	from "struct value *".
	* d-valprint.c (dynamic_array_type): Likewise.
	(d_val_print): Likewise.
	* f-lang.h (f_val_print): Likewise.
	* f-valprint.c (f_val_print): Likewise.
	* go-lang.h (go_val_print): Likewise.
	* go-valprint.c (print_go_string): Likewise.
	(go_val_print): Likewise.
	* language.c (unk_lang_val_print): Likewise.
	* language.h (struct language_defn) <la_val_print>: Likewise.
	Update comments.
	(LA_VAL_PRINT): Remove.
	* m2-lang.h (m2_val_print): Remove const from
	"struct value *".
	* m2-valprint.c (m2_print_array_contents): Likewise.
	(m2_val_print): Likewise.
	* p-lang.h (pascal_val_print): Remove second parameter.  Remove
	const from "struct value *".
	(pascal_object_print_value_fields): Likewise.
	* p-valprint.c (pascal_val_print): Likewise.
	(pascal_object_print_value_fields): Likewise.
	(pascal_object_print_value): Likewise.
	* rust-lang.c (rust_get_disr_info): Likewise.
	(val_print_struct): Likewise.
	(rust_val_print): Likewise.
	* valprint.c (generic_val_print_array): Likewise.
	(generic_val_print_ptr): Likewise.
	(generic_val_print_memberptr): Likewise.
	(generic_val_print_ref): Likewise.
	(generic_val_print_enum): Likewise.
	(generic_val_print_flags): Likewise.
	(generic_val_print_func): Likewise.
	(generic_val_print_bool): Likewise.
	(generic_val_print_int): Likewise.
	(generic_val_print_char): Likewise.
	(generic_val_print_float): Likewise.
	(generic_val_print_decfloat): Likewise.
	(generic_val_print_complex): Likewise.
	(generic_val_print): Likewise.
	(val_print): Likewise.
	(common_val_print): Likewise.
	(val_print_type_code_flags): Likewise.
	(val_print_scalar_formatted): Likewise.
	(val_print_array_elements): Likewise.
	* valprint.h (val_print_array_elements): Update declaration.
	(val_print_scalar_formatted): Likewise.
	(generic_val_print): Likewise.
	* value.h (val_print): Likewise.
 2016-11-08 16:02:42 +00:00
Pedro Alves
2f408ecb92 Use ui_file_as_string throughout more 
This replaces most of the remaining ui_file_xstrdup calls with
ui_file_as_string calls.  Whenever a call was replaced, that led to a
cascade of other necessary adjustments throughout, to make the code
use std::string instead of raw pointers.  And then whenever I added a
std::string as member of a struct, I needed to adjust
allocation/destruction of said struct to use new/delete instead of
xmalloc/xfree.

The stopping point was once gdb built again.  These doesn't seem to be
a way to reasonably split this out further.

Maybe-not-obvious changes:

 - demangle_for_lookup returns a cleanup today.  To get rid of that,
   and avoid unnecessary string dupping/copying, this introduces a
   demangle_result_storage type that the caller instantiates and
   passes to demangle_for_lookup.

 - Many methods returned a "char *" to indicate that the caller owns
   the memory and must free it.  Those are switched to return a
   std::string instead.  Methods that return a "view" into some
   internal string return a "const char *" instead.  I.e., we only
   copy/allocate when necessary.

gdb/ChangeLog:
2016-11-08  Pedro Alves  <palves@redhat.com>

	* ada-lang.c (ada_name_for_lookup, type_as_string): Use and return
	std::string.
	(type_as_string_and_cleanup): Delete.
	(ada_lookup_struct_elt_type): Use type_as_string.
	* ada-lang.h (ada_name_for_lookup): Now returns std::string.
	* ada-varobj.c (ada_varobj_scalar_image): Return a std::string.
	(ada_varobj_describe_child): Make 'child_name' and
	'child_path_expr' parameters std::string pointers.
	(ada_varobj_describe_struct_child, ada_varobj_describe_ptr_child):
	Likewise, and use string_printf.
	(ada_varobj_describe_simple_array_child)
	(ada_varobj_describe_child): Likewise.
	(ada_varobj_get_name_of_child, ada_varobj_get_path_expr_of_child)
	(ada_varobj_get_value_image)
	(ada_varobj_get_value_of_array_variable)
	(ada_varobj_get_value_of_variable, ada_name_of_variable)
	(ada_name_of_child, ada_path_expr_of_child)
	(ada_value_of_variable): Now returns std::string.  Use
	string_printf.
	(ada_value_of_child): Adjust.
	* break-catch-throw.c (check_status_exception_catchpoint): Adjust
	to use std::string.
	* breakpoint.c (watch_command_1): Adjust to use std::string.
	* c-lang.c (c_get_string): Adjust to use std::string.
	* c-typeprint.c (print_name_maybe_canonical): Use std::string.
	* c-varobj.c (varobj_is_anonymous_child): Use ==/!= std::string
	operators.
	(c_name_of_variable): Now returns a std::string.
	(c_describe_child): The 'cname' and 'cfull_expression' output
	parameters are now std::string pointers.  Adjust.
	(c_name_of_child, c_path_expr_of_child, c_value_of_variable)
	(cplus_number_of_children): Adjust to use std::string and
	string_printf.
	(cplus_name_of_variable): Now returns a std::string.
	(cplus_describe_child): The 'cname' and 'cfull_expression' output
	parameters are now std::string pointers.  Adjust.
	(cplus_name_of_child, cplus_path_expr_of_child)
	(cplus_value_of_variable): Now returns a std::string.
	* cp-abi.c (cplus_typename_from_type_info): Return std::string.
	* cp-abi.h (cplus_typename_from_type_info): Return std::string.
	(struct cp_abi_ops) <get_typename_from_type_info>: Return
	std::string.
	* cp-support.c (inspect_type): Use std::string.
	(cp_canonicalize_string_full, cp_canonicalize_string_no_typedefs)
	(cp_canonicalize_string): Return std::string and adjust.
	* cp-support.h (cp_canonicalize_string)
	(cp_canonicalize_string_no_typedefs, cp_canonicalize_string_full):
	Return std::string.
	* dbxread.c (read_dbx_symtab): Use std::string.
	* dwarf2read.c (dwarf2_canonicalize_name): Adjust to use std::string.
	* gdbcmd.h (lookup_struct_elt_type): Adjust to use std::string.
	* gnu-v3-abi.c (gnuv3_get_typeid): Use std::string.
	(gnuv3_get_typename_from_type_info): Return a std::string and
	adjust.
	(gnuv3_get_type_from_type_info): Adjust to use std::string.
	* guile/guile.c (gdbscm_execute_gdb_command): Adjust to use
	std::string.
	* infcmd.c (print_return_value_1): Adjust to use std::string.
	* linespec.c (find_linespec_symbols): Adjust to
	demangle_for_lookup API change.  Use std::string.
	* mi/mi-cmd-var.c (print_varobj, mi_cmd_var_set_format)
	(mi_cmd_var_info_type, mi_cmd_var_info_path_expression)
	(mi_cmd_var_info_expression, mi_cmd_var_evaluate_expression)
	(mi_cmd_var_assign, varobj_update_one): Adjust to use std::string.
	* minsyms.c (lookup_minimal_symbol): Use std::string.
	* python/py-varobj.c (py_varobj_iter_next): Use new instead of
	XNEW.  vitem->name is a std::string now, adjust.
	* rust-exp.y (convert_ast_to_type, convert_name): Adjust to use
	std::string.
	* stabsread.c (define_symbol): Adjust to use std::string.
	* symtab.c (demangle_for_lookup): Now returns 'const char *'.  Add
	a demangle_result_storage parameter.  Use it for storage.
	(lookup_symbol_in_language)
	(lookup_symbol_in_objfile_from_linkage_name): Adjust to new
	demangle_for_lookup API.
	* symtab.h (struct demangle_result_storage): New type.
	(demangle_for_lookup): Now returns 'const char *'.  Add a
	demangle_result_storage parameter.
	* typeprint.c (type_to_string): Return std::string and use
	ui_file_as_string.
	* value.h (type_to_string): Change return type to std::string.
	* varobj-iter.h (struct varobj_item) <name>: Now a std::string.
	(varobj_iter_delete): Use delete instead of xfree.
	* varobj.c (create_child): Return std::string instead of char * in
	output parameter.
	(name_of_variable, name_of_child, my_value_of_variable): Return
	std::string instead of char *.
	(varobj_create, varobj_get_handle): Constify 'objname' parameter.
	Adjust to std::string fields.
	(varobj_get_objname): Return a const char * instead of a char *.
	(varobj_get_expression): Return a std::string.
	(varobj_list_children): Adjust to use std::string.
	(varobj_get_type): Return a std::string.
	(varobj_get_path_expr): Return a const char * instead of a char *.
	Adjust to std::string fields.
	(varobj_get_formatted_value, varobj_get_value): Return a
	std::string.
	(varobj_set_value): Change type of 'expression' parameter to
	std::string.  Use std::string.
	(install_new_value): Use std::string.
	(delete_variable_1): Adjust to use std::string.
	(create_child): Change the 'name' parameter to a std::string
	reference.  Swap it into the new item's name.
	(create_child_with_value): Swap item's name into the new child's
	name.  Use string_printf.
	(new_variable): Use new instead of XNEW.
	(free_variable): Don't xfree fields that are now std::string.
	(name_of_variable, name_of_child): Now returns std::string.
	(value_of_root): Adjust to use std::string.
	(my_value_of_variable, varobj_value_get_print_value): Return
	and use std::string.
	(varobj_value_get_print_value): Adjust to use ui_file_as_string
	and std::string.
	* varobj.h (struct varobj) <name, path_expr, obj_name,
	print_value>: Now std::string's.
	<name_of_variable, name_of_child, path_expr_of_child,
	value_of_variable>: Return std::string.
	(varobj_create, varobj_get_handle): Constify 'objname' parameter.
	(varobj_get_objname): Return a const char * instead of a char *.
	(varobj_get_expression, varobj_get_type): Return a std::string.
	(varobj_get_path_expr): Return a const char * instead of a char *.
	(varobj_get_formatted_value, varobj_get_value): Return a
	std::string.
	(varobj_set_value): Constify 'expression' parameter.
	(varobj_value_get_print_value): Return a std::string.
 2016-11-08 15:26:47 +00:00