Always reading 32 bits in order to extract addends from instruction
fields is wrong when the field size is smaller. It also leads to
reading past the end of the section. This patch tidies that by
reading the proper field size, which allows some later refetching of
addends to disappear.
PR 26422
* elf32-arm.c (elf32_arm_final_link_relocate): Use the appropriate
bfd_get_x size function to read addends out of fields. Apply
rightshift adjustment too. Don't apply the now unnecessary
howto->size shift to branch REL addends. Don't refetch R_ARM_ABS8
and R_ARM_ABS16 addends. Don't refetch thumb branch addends.
Correct R_ARM_THM_JUMP6 addend.
Some versions of gcc with -Werror=format-overflow complain about using
a perfectly good 7 char buffer for "r%dr%d" when the int is between 0
and 64, apparently not seeing the value range.
note: __builtin___sprintf_chk output between 5 and 24 bytes into a destination of size 7
* config/tc-arc.c (declare_register_set): Avoid false positive
format-overflow warning.
* config/tc-epiphany.c (md_assemble): Likewise.
* config/tc-mips.c (md_begin): Likewise.
* config/tc-mmix.c (mmix_md_begin): Likewise.
* config/tc-nds32.c (nds32_elf_append_relax_relocs): Avoid false
positive "may be used uninitialized" warning.
Fix bug PR m2/26372, GDB's inability to parse multi-dimensional
modula-2 arrays.
We previously had two rules for handling the parsing of array
sub-scripts. I have reproduced them here with the actual handler
blocks removed to make the bug clearer:
exp : exp '[' non_empty_arglist ']'
;
exp : exp '[' exp ']'
;
non_empty_arglist
: exp
;
non_empty_arglist
: non_empty_arglist ',' exp
;
This is ambiguous as the pattern "exp '[' exp" could match either of
the 'exp' rules. Currently it just so happens that the parser picks
the second 'exp' rule which means we can only handle a single array
index.
As the handler code for the first 'exp' pattern will correctly handle
and number of array indexes then lets just remove the second pattern.
gdb/ChangeLog:
PR m2/26372
* m2-exp.y (exp): Improve comment for non_empty_arglist case, add
an assert. Remove single element array indexing pattern as the
MULTI_SUBSCRIPT support will handle this case too.
gdb/testsuite/ChangeLog:
PR m2/26372
* gdb.modula2/multidim.c: New file.
* gdb.modula2/multidim.exp: New file.
Here is a bugfix for Pr 26372 [Modula-2] Parsing of multi-subscript arrays.
Also included is a dejagnu testcase. No extra regressions are caused on
Debian GNU/Linux Buster amd64.
gdb/ChangeLog:
2020-08-25 Gaius Mulley <gaiusmod2@gmail.com>
PR m2/26372
* m2-exp.y: Rewrite array subscript rules to support multidimension
array access. (ArgumentList) replaces non_empty_arglist.
gdb/testsuite/ChangeLog:
2020-08-25 Gaius Mulley <gaiusmod2@gmail.com>
PR m2/26372
* testsuite/gdb.modula2/multidim.exp: New file.
* testsuite/gdb.modula2/multidim.c: New file.
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
I noticed that when a test uses `runto_main` and a GDB internal error
happens while running to main, no error or fail is emitted. This is
because `runto_main` uses the `no-message` option of `runto`.
As a result, if a test fails to run to main and exits, no sign that
something went wrong is emitted. For example, add this always-false
assertion to compute_frame_id:
--- a/gdb/frame.c
+++ b/gdb/frame.c
@@ -545,6 +545,7 @@ static void
compute_frame_id (struct frame_info *fi)
{
gdb_assert (!fi->this_id.p);
+ gdb_assert (false);
if (frame_debug)
fprintf_unfiltered (gdb_stdlog, "{ compute_frame_id (fi=%d) ",
... and run gdb.dwarf2/dw2-align.exp. No fail or sign that something
went wrong is shown. It just appears as if the test gets skipped.
A developer introducing such a regression in this test today would
likely notice it, because we are used to diff-ing test results. So we
would see some PASSes dispappear for no good reason and look into it.
But I find it worrysome for two reasons:
1. Scripts that analyze regressions (such as the one on the buildbot)
may only look for new FAILs or new ERRORs. It would probably miss
this.
2. Imagine that we one day have a testsuite that runs cleanly (some
people might already run subsets of the testsuite and expect it to
all pass), we would just run the testsuite and check that there are
no fails. It would be easy to miss something like this.
In case of internal error, I suggest making `runto` emit a FAIL even if
`no-message` was passed. This is different from other failure modes
that might be expected (whchi rightfully cause the test to simply be
skipped). An internal error is always bad, so if it happens it should
noisily fail.
gdb/testsuite/ChangeLog:
* lib/gdb.exp (runto): Always emit fail on internal error.
Change-Id: I6e6faed4868ea821541a23042b2d01c30058b0d3
To help ensure that all debug statements have the same format, introduce
the debug_prefixed_vprintf helper. Implement linux_nat_debug_printf_1
and infrun_debug_printf_1 with it.
I would eventually like to style the module and function name with some
color, to help them stick out, but I don't really know how to do that
yet, it can always be done later.
gdb/ChangeLog:
* debug.h: New file.
* debug.c (debug_prefixed_vprintf): New function.
* infrun.c (infrun_debug_printf_1): Use debug_prefixed_vprintf.
* linux-nat.c (linux_nat_debug_printf_1): Likewise.
Change-Id: Iccc290a2dc6b5fffcbe1c2866ed8d804ad380764
Introduce this macro to print debug statements in the infrun.c file,
same idea as what was done in 9327494e0e ("gdb: add
linux_nat_debug_printf macro").
Although in this case, there are places outside infrun.c that print
debug statements if debug_infrun is set. So the macro has to be
declared in the header file, so that it can be used in these other
files.
Note one special case. In stop_all_threads, I've used an explicit
if (debug_infrun)
infrun_debug_printf_1 ("stop_all_threads", "done");
for the message in the SCOPE_EXIT. Otherwise, the message appears like
this:
[infrun] operator(): done
Until we find a better solution for extracting a meaningful function
name for lambda functions, I think it's fine to handle these special
cases manually, they are quite rare.
Some tests need to be updated, because they rely on some infrun debug
statements.
gdb/ChangeLog:
* infrun.h (infrun_debug_printf_1): New function declaration.
(infrun_debug_printf): New macro.
* infrun.c (infrun_debug_printf_1): Use infrun_debug_printf
throughout.
(infrun_debug_printf): New function.
* breakpoint.c (should_be_inserted): Use infrun_debug_printf.
(handle_jit_event): Likewise.
gdb/testsuite/ChangeLog:
* gdb.base/gdb-sigterm.exp (do_test): Update expected regexp.
* gdb.threads/signal-while-stepping-over-bp-other-thread.exp:
Likewise.
* gdb.threads/stepi-random-signal.exp: Likewise.
Change-Id: I66433c8a9caa64c8525ab57c593022b9d1956d5c
As reported in [1], _bfd_error_handler() doesn't support '%zu'.
module_name_size is always 32-bits in the data structure we are
extracting it from, so use an unsigned int to store it instead.
[1] https://sourceware.org/pipermail/gdb-patches/2020-August/171391.html
bfd/ChangeLog:
2020-08-21 Jon Turney <jon.turney@dronecode.org.uk>
* elf.c (elfcore_grok_win32pstatus): Change name_size to unsigned
int. Use '%u' format with _bfd_error_handler to render it.
Stub sections are inserted after sec_info is sized, so have higher ids.
Test flags that will exclude stub sections before looking at the
sec_info array.
PR 26489
* elf64-ppc.c (ppc64_elf_size_stubs): Test code_sec->has_toc_reloc
and code_sec->makes_toc_func_call before sec_info[code_sec->id].
A number of the tic54x tests were failing, and I thought it worth
investigating since the target makes use of a lot of hash tables, and
we've just changed gas hash tables. It turns out none of the gas
failures were due to hashing.
* config/tc-tic54x.c (stag_add_field_symbols): Don't free "name"
in case where it isn't copied.
* config/tc-tic54x.h (LOCAL_LABELS_FB): Undef.
* testsuite/gas/tic54x/field.d: Dump section contents and symbols
rather than disassembling.
* testsuite/gas/tic54x/set.d: Adjust for newer disassembly.
ppc64 ld optimises sequences like the following
addis 3,13,wot@tprel@ha
lwz 3,wot@tprel@l(3)
to
nop
lwz 3,wot@tprel(13)
when "wot" is located near enough to the thread pointer.
However, the ABI doesn't require that R_PPC64_TPREL16_HA always be on
an addis rt,13,imm instruction, and while ld checked for that on the
high-part instruction it didn't disable the optimisation on the
low-part instruction. This patch fixes that problem, disabling the
tprel optimisation globally if high-part instructions don't pass
sanity checks. The optimisation is also enabled for ppc32, where
before ld.bfd had the code in the wrong place and ld.gold had it in a
block only enabled for ppc64.
bfd/
* elf32-ppc.c (ppc_elf_check_relocs): Set has_tls_reloc for
high part tprel16 relocs.
(ppc_elf_tls_optimize): Sanity check high part tprel16 relocs.
Clear do_tls_opt on odd instructions.
(ppc_elf_relocate_section): Move TPREL16_HA/LO optimisation later.
Don't sanity check them here.
* elf64-ppc.c (ppc64_elf_check_relocs): Set has_tls_reloc for
high part tprel16 relocs.
(ppc64_elf_tls_optimize): Sanity check high part tprel16 relocs.
Clear do_tls_opt on odd instructions.
(ppc64_elf_relocate_section): Don't sanity check TPREL16_HA.
ld/
* testsuite/ld-powerpc/tls32.d: Update for TPREL_HA/LO optimisation.
* testsuite/ld-powerpc/tlsexe32.d: Likewise.
* testsuite/ld-powerpc/tlsldopt32.d: Likewise.
* testsuite/ld-powerpc/tlsmark32.d: Likewise.
* testsuite/ld-powerpc/tlsopt4_32.d: Likewise.
* testsuite/ld-powerpc/tprel.s,
* testsuite/ld-powerpc/tprel.d,
* testsuite/ld-powerpc/tprel32.d: New tests.
* testsuite/ld-powerpc/tprelbad.s,
* testsuite/ld-powerpc/tprelbad.d: New test.
* testsuite/ld-powerpc/powerpc.exp: Run them.
gold/
* powerpc.cc (Target_powerpc): Add tprel_opt_ and accessors.
(Target_powerpc::Scan::local): Sanity check tprel high relocs.
(Target_powerpc::Scan::global): Likewise.
(Target_powerpc::Relocate::relocate): Control tprel optimisation
with tprel_opt_ and enable for 32-bit.
Building with a really old flex and a really new g++ is probably not
recommended, but it should not cause compile errors.
gdb/ChangeLog:
* ada-lex.l: Extend register warnings diagnostics comment for g++.
include/ChangeLog:
* diagnostics.h (DIAGNOSTIC_IGNORE_DEPRECATED_REGISTER): Also define
for GCC version 7.0 or higher.
The symbol string table in the .symtab section is optional and cosmetic.
Keep only one '@' for undefined versioned symbols, which are defined in
shared objects, in the symbol string table. Update "nm -D" to display
only one '@' for undefined versioned symbols.
bfd/
PR ld/26382
* elflink.c (elf_link_output_symstrtab): Keep only one '@' for
versioned symbols, which are defined in shared objects, in
symbol string table.
binutils/
PR ld/26382
* nm.c (print_symname): Display only one '@' for undefined
versioned symbols.
* doc/binutils.texi: Update nm version information.
ld/
PR ld/26382
* testsuite/ld-elf/pr26302.nd: Updated.
* testsuite/ld-elf/pr26302.rd: New file.
* testsuite/ld-elf/shared.exp: Add a test for readelf -sW.
I'm dealing these days with a class of bugs that involve trying to get a
certain frame's id while we are in the process of computing it. In other
words, compute_frame_id being called for a frame, eventually calling
get_frame_id for that same frame. I don't think this is ever supposed to
happen, as that creates a cyclic dependency.
Usually, these problems cause some failure down the line. I'm proposing with
this patch to catch them as early as possible, as soon as the situation
described above happens. I think that helps because the failed assertion will
be closer to the root of the problem.
To do so, the patch changes the frame_info::this_id::p flag from a boolean (is
the frame id computed or not) to a tri-state:
- the frame id is not computed
- the frame id is being computed
- the frame id is computed
Then, we can properly assert that get_frame_id doesn't get called for a frame
whose id is being computed.
To illustrate how that can help, let's imagine we apply the following change to
frame_unwind_got_optimized:
--- a/gdb/frame-unwind.c
+++ b/gdb/frame-unwind.c
@@ -260,8 +260,7 @@ frame_unwind_got_optimized (struct frame_info *frame, int regnum)
mark_value_bytes_optimized_out (val, 0, TYPE_LENGTH (type));
VALUE_LVAL (val) = lval_register;
VALUE_REGNUM (val) = regnum;
- VALUE_NEXT_FRAME_ID (val)
- = get_frame_id (get_next_frame_sentinel_okay (frame));
+ VALUE_NEXT_FRAME_ID (val) = get_frame_id (frame);
return val;
}
... and run the following command, which leads to a failed assertion (you need
to run the corresponding test to generate the binary first):
$ ./gdb -q -nx testsuite/outputs/gdb.dwarf2/dw2-undefined-ret-addr/dw2-undefined-ret-addr -ex "b stop_frame" -ex r
Without this patch applied, we catch the issue indirectly, when the top-level
get_frame_id tries to stash the frame:
/home/smarchi/src/binutils-gdb/gdb/frame.c:593: internal-error: frame_id get_frame_id(frame_info*): Assertion `stashed' failed.
...
#9 0x0000000001af1c3a in internal_error (file=0x1cea060 "/home/smarchi/src/binutils-gdb/gdb/frame.c", line=593, fmt=0x1ce9f80 "%s: Assertion `%s' failed.") at /home/smarchi/src/binutils-gdb/gdbsupport/errors.cc:55
#10 0x0000000000e9b413 in get_frame_id (fi=0x6210005105e0) at /home/smarchi/src/binutils-gdb/gdb/frame.c:593
#11 0x0000000000e99e35 in scoped_restore_selected_frame::scoped_restore_selected_frame (this=0x7fff1d8b9760) at /home/smarchi/src/binutils-gdb/gdb/frame.c:308
#12 0x000000000149a261 in print_frame_args (fp_opts=..., func=0x6210000dd7d0, frame=0x6210005105e0, num=-1, stream=0x60300008a580) at /home/smarchi/src/binutils-gdb/gdb/stack.c:750
#13 0x000000000149d938 in print_frame (fp_opts=..., frame=0x6210005105e0, print_level=0, print_what=SRC_AND_LOC, print_args=1, sal=...) at /home/smarchi/src/binutils-gdb/gdb/stack.c:1394
#14 0x000000000149c0c8 in print_frame_info (fp_opts=..., frame=0x6210005105e0, print_level=0, print_what=SRC_AND_LOC, print_args=1, set_current_sal=1) at /home/smarchi/src/binutils-gdb/gdb/stack.c:1119
#15 0x0000000001498100 in print_stack_frame (frame=0x6210005105e0, print_level=0, print_what=SRC_AND_LOC, set_current_sal=1) at /home/smarchi/src/binutils-gdb/gdb/stack.c:366
#16 0x00000000010234b7 in print_stop_location (ws=0x7fff1d8ba1f0) at /home/smarchi/src/binutils-gdb/gdb/infrun.c:8366
#17 0x000000000102362d in print_stop_event (uiout=0x607000018660, displays=true) at /home/smarchi/src/binutils-gdb/gdb/infrun.c:8382
...
It freaks out because the frame is already in the stash: it was added by an
inner call to get_frame_id, called indirectly by compute_frame_id. Debugging
this failure is difficult because we have to backtrack to where this happened.
With the patch applied, we catch the issue earlier, here:
/home/smarchi/src/binutils-gdb/gdb/frame.c:601: internal-error: frame_id get_frame_id(frame_info*): Assertion `fi->this_id.p != frame_id_status::COMPUTING' failed
...
#9 0x0000000001af22bc in internal_error (file=0x1cea6e0 "/home/smarchi/src/binutils-gdb/gdb/frame.c", line=601, fmt=0x1cea600 "%s: Assertion `%s' failed.") at /home/smarchi/src/binutils-gdb/gdbsupport/errors.cc:55
#10 0x0000000000e9b7e3 in get_frame_id (fi=0x62100050dde0) at /home/smarchi/src/binutils-gdb/gdb/frame.c:601
#11 0x0000000000e989b3 in frame_unwind_got_optimized (frame=0x62100050dde0, regnum=16) at /home/smarchi/src/binutils-gdb/gdb/frame-unwind.c:264
#12 0x0000000000cbe386 in dwarf2_frame_prev_register (this_frame=0x62100050dde0, this_cache=0x62100050ddf8, regnum=16) at /home/smarchi/src/binutils-gdb/gdb/dwarf2/frame.c:1267
#13 0x0000000000e9f569 in frame_unwind_register_value (next_frame=0x62100050dde0, regnum=16) at /home/smarchi/src/binutils-gdb/gdb/frame.c:1266
#14 0x0000000000e9eaab in frame_register_unwind (next_frame=0x62100050dde0, regnum=16, optimizedp=0x7ffca814ade0, unavailablep=0x7ffca814adf0, lvalp=0x7ffca814ae10, addrp=0x7ffca814ae20, realnump=0x7ffca814ae00, bufferp=0x7ffca814aec0 "") at /home/smarchi/src/binutils-gdb/gdb/frame.c:1169
#15 0x0000000000e9f233 in frame_unwind_register (next_frame=0x62100050dde0, regnum=16, buf=0x7ffca814aec0 "") at /home/smarchi/src/binutils-gdb/gdb/frame.c:1225
#16 0x0000000000f84262 in i386_unwind_pc (gdbarch=0x6210000eed10, next_frame=0x62100050dde0) at /home/smarchi/src/binutils-gdb/gdb/i386-tdep.c:1969
#17 0x0000000000ec95dd in gdbarch_unwind_pc (gdbarch=0x6210000eed10, next_frame=0x62100050dde0) at /home/smarchi/src/binutils-gdb/gdb/gdbarch.c:3062
#18 0x0000000000cb5e9d in dwarf2_tailcall_sniffer_first (this_frame=0x62100050dde0, tailcall_cachep=0x62100050dee0, entry_cfa_sp_offsetp=0x7ffca814b160) at /home/smarchi/src/binutils-gdb/gdb/dwarf2/frame-tailcall.c:387
#19 0x0000000000cbdd38 in dwarf2_frame_cache (this_frame=0x62100050dde0, this_cache=0x62100050ddf8) at /home/smarchi/src/binutils-gdb/gdb/dwarf2/frame.c:1198
#20 0x0000000000cbe026 in dwarf2_frame_this_id (this_frame=0x62100050dde0, this_cache=0x62100050ddf8, this_id=0x62100050de40) at /home/smarchi/src/binutils-gdb/gdb/dwarf2/frame.c:1226
#21 0x0000000000e9b447 in compute_frame_id (fi=0x62100050dde0) at /home/smarchi/src/binutils-gdb/gdb/frame.c:580
#22 0x0000000000e9b89e in get_frame_id (fi=0x62100050dde0) at /home/smarchi/src/binutils-gdb/gdb/frame.c:613
#23 0x0000000000e99e35 in scoped_restore_selected_frame::scoped_restore_selected_frame (this=0x7ffca814b610) at /home/smarchi/src/binutils-gdb/gdb/frame.c:315
#24 0x000000000149a8e3 in print_frame_args (fp_opts=..., func=0x6210000dd7d0, frame=0x62100050dde0, num=-1, stream=0x60300008a520) at /home/smarchi/src/binutils-gdb/gdb/stack.c:750
#25 0x000000000149dfba in print_frame (fp_opts=..., frame=0x62100050dde0, print_level=0, print_what=SRC_AND_LOC, print_args=1, sal=...) at /home/smarchi/src/binutils-gdb/gdb/stack.c:1394
#26 0x000000000149c74a in print_frame_info (fp_opts=..., frame=0x62100050dde0, print_level=0, print_what=SRC_AND_LOC, print_args=1, set_current_sal=1) at /home/smarchi/src/binutils-gdb/gdb/stack.c:1119
#27 0x0000000001498782 in print_stack_frame (frame=0x62100050dde0, print_level=0, print_what=SRC_AND_LOC, set_current_sal=1) at /home/smarchi/src/binutils-gdb/gdb/stack.c:366
#28 0x0000000001023b39 in print_stop_location (ws=0x7ffca814c0a0) at /home/smarchi/src/binutils-gdb/gdb/infrun.c:8366
#29 0x0000000001023caf in print_stop_event (uiout=0x607000018660, displays=true) at /home/smarchi/src/binutils-gdb/gdb/infrun.c:8382
...
Now, we can clearly see that get_frame_id for frame `fi=0x62100050dde0` gets
called while compute_frame_id is active for that frame. The backtrace is more
helpful to identify the root of the problem.
gdb/ChangeLog:
* frame.c (enum class frame_id_status): New.
(struct frame_info) <this_id::p>: Change type to frame_id_status.
(fprintf_frame): Update.
(compute_frame_id): Set frame id status to "computing" on entry.
Set it back to "not_computed" on failure and to "computed" on
success.
(get_frame_id): Assert the frame id is not being computed.
(create_sentinel_frame): Use frame_id_status::COMPUTED.
(create_new_frame): Likewise.
(frame_cleanup_after_sniffer): Update assert.
Change-Id: I5f1a25fafe045f756bd75f358892720b30ed20c9
When trying to re-generate configure in sim/bfin, I get:
$ autoreconf -vf
autoreconf: Entering directory `.'
autoreconf: configure.ac: not using Gettext
autoreconf: running: aclocal --force
autoreconf: configure.ac: tracing
autoreconf: configure.ac: not running libtoolize: --install not given
autoreconf: running: /opt/autostuff/bin/autoconf --force
configure.ac:57: error: possibly undefined macro: AC_CHECK_LIB
If this token and others are legitimate, please use m4_pattern_allow.
See the Autoconf documentation.
autoreconf: /opt/autostuff/bin/autoconf failed with exit status: 1
This happens since commit f693213d12 ("Run `autoreconf -vf` throughout").
The problem (not clear from the error message) is that the
PKG_CHECK_MODULES macro used in configure.ac is undefined. In the past, I
suppose that it relied on the person running autoconf having pkg.m4 (from
pkg-config) in their include path. That's not my case.
Since we recently added a local version of PKG_CHECK_MODULES to our tree,
we can just make sim/bfin/configure.ac use it. This patch makes
configure.ac include config/pkg.m4, and re-generates configure. With this,
the configure script appears to be generated correctly, I am able to
configure and build the bfin simulator.
Note: using sinclude to include the required m4 files makes no sense to
me. These files contain macros we need, if they are not defined then
the resulting file is unusable. And sinclude fails silently if the file
is not found. So, better use include/m4_include.
sim/bfin/ChangeLog:
* configure.ac: Include config/pkg.m4.
Change-Id: I7d8012e5ed510cd7746b94e918f0feb1c701cd83
bfd * elfnn-aarch64.c (_bfd_aarch64_erratum_835769_scan): Only sort
the data map if there are entries in it.
(_bfd_aarch64_erratum_843419_scan): Likewise.
opcodes * aarch64-dis.c (get_sym_code_type): Return FALSE for non-ELF
symbols.
readelf_wi_test checks the DW_AT_LANGUAGE is recognized by matching
against ANSI C. But for the new DWARF5 DW_LANG_C11 readelf simply
prints "C11", not prefixed with ANSI (DW_LANG_C is "non-ANSI C",
DW_LANG_C89 is "ANSI C" and DW_LANG_C99 is "ANSI-C99"). Adjust the
testcase instead of readelf because C11 seems a fine name.
binutils/ChangeLog:
* testsuite/binutils-all/readelf.exp (readelf_wi_test): Also
recognize DW_LANG_C11.
gas handles local symbols specially in order to save memory, but the
implementation using two separate hash tables is inefficient,
particularly the scheme of duplicating a struct local_symbol when it
needs to be converted to a full struct symbol. Also, updating symbol
pointers with LOCAL_SYMBOL_CHECK is horrible and has led to some hard
to find bugs.
This changes the implementation to use a single hash table and avoids
another copy of the symbol name in symbol_entry_t. When converting
local symbols the struct local_symbol memory is reused. Not only
does that save memory, but there is no need to twiddle symbol pointers
with LOCAL_SYMBOL_CHECK.
Assembling gcc-10 -g -Og gold/powerpc.cc output shows the following:
old:
symbol table hash statistics:
1371192 searches
1290398 collisions
143585 elements
262139 table size
mini local symbol table hash statistics:
2966204 searches
2707489 collisions
523533 elements
1048573 table size
523533 mini local symbols created, 140453 converted
new:
symbol table hash statistics:
2828883 searches
2453138 collisions
526665 elements
1048573 table size
523533 mini local symbols created, 140453 converted
* symbols.c (struct local_symbol): Add "hash" entry. Reorder fields.
Delete union. Adjust code throughout file.
(struct symbol): Add "hash", "name" and "x" entries. Reorder fields.
Split off some to..
(struct xsymbol): ..this. New struct. Adjust code throughout file
accessing these fields.
(struct symbol_entry): Delete.
(union symbol_entry): New.
(hash_symbol_entry): Adjust for symbol_entry_t change.
(symbol_entry_find): Likewise.
(eq_symbol_entry): Compare hash values too.
(symbol_entry_alloc): Delete.
(local_symbol_converted_p, local_symbol_mark_converted): Delete.
(local_symbol_get_real_symbol, local_symbol_set_real_symbol): Delete.
(local_hash): Delete.
(abs_symbol_x, dot_symbol_x): New static var.
(symbol_init): New function.
(symbol_create): Rewrite.
(LOCAL_SYMBOL_CHECK): Delete. Replace uses throughout with simple
test of flags.local_symbol.
(local_symbol_make): Adjust for struct local_symbol changes.
(local_symbol_convert): Rewrite. Adjust all callers.
(symbol_table_insert): Simplify.
(symbol_clone): Comment on local sym cloning. Handle split symbol
struct.
(get_real_sym): Delete. Remove all uses.
(symbol_find_exact_noref): Simplify.
(resolve_local_symbol): Don't resolve non-locals.
(S_SET_SEGMENT): Don't special case reg_section.
(S_SET_NAME): Set both name and bsym->name.
(symbol_mark_resolved, symbol_resolved_p): Simplify.
(symbol_symbolS): Update comment.
(symbol_begin): Don't create local_hash. Adjust abs_symbol setup.
(dot_symbol_init): Adjust dot_symbol setup.
(symbol_print_statistics): Delete local_hash stats.
Get rid of sy_ prefix, and some unused fields.
* symbols.c (struct symbol_flags): Rename sy_volatile to volatil,
and remove sy_ from other field names. Update throughout.
(struct symbol): Remove sy_ from field names. Delete unused
TARGET_SYMBOL_FIELDS. Update throughout file. Move after..
(struct local_symbol): ..here. Remove lsy_ from field names.
Delete unused TC_LOCAL_SYMFIELD_TYPE. Update throughout file.
(local_symbol_resolved_p, local_symbol_mark_resolved): Delete.
Expand uses throughout file.
(local_symbol_get_frag, local_symbol_set_frag): Likewise.
(symbol_new): Move symbol_table_frozen test to..
(symbol_append): ..here, and..
(symbol_insert): ..here.
(resolve_symbol_value, symbol_relc_make_expr): White space fixes.
(HANDLE_XADD_OPT1, HANDLE_XADD_OPT2): Likewise.
* config/obj-coff.h (RESOLVE_SYMBOL_REDEFINITION): Update.
gas/
* config/tc-csky.c (csky_insn_info): Add member last_isize.
(md_assemble): Assign value to csky_insn.last_isize.
* testsuite/gas/csky/enhance_dsp.d: Test bloop's two operands form.
* testsuite/gas/csky/enhance_dsp.s: Likewise.
opcodes/
* csky-opc.h (csky_v2_opcodes): Add two operands form for bloop.
Xen Project embeds a build ID in its hypervisor binary (including its
EFI variant), living in a standalone section. This usually gets placed
right after .rodata, and due to the rounding done on the (file) size of
.rodata the two sections appear to overlap (as far as e.g.
find_section_by_vma() is concerned). With the first byte "found" in
.rodata, nothing guarantees that the entire debug dir fits in that
section, leading to apparently random failure of objcopy on such an
image.
Possible alternatives to the solution chosen:
- make find_section_by_vma() honor virt_size,
- correct the recording of sizes elsewhere (ibfd has size == virt_size,
while obfd doesn't),
- fix the linker to avoid producing apparently overlapping sections.
While touching the condition around and the contents of the disgnostic,
pull it up ahead of the bfd_malloc_and_get_section() call: There's no
point first obtaining the section contents, in order to then fail.
As reported by Tom here [1], commit 888bdb2b74 ("gdb: change regcache
list to be a map") overlooked an important case, causing a regression.
When registers_changed_ptid is called with a pid-like ptid, it used to
clear all the regcaches for that pid. That commit accidentally removed
that behavior. We need to handle the `ptid.is_pid ()` case in
registers_changed_ptid.
The most trivial way of fixing it would be to iterate on all ptids of a
target and delete the entries where the ptid match the pid. But the
point of that commit was to avoid having to iterate on ptids to
invalidate regcaches, so that would feel like a step backwards.
The only logical solution I see is to add yet another map level, so that
we now have:
target -> (pid -> (ptid -> regcaches))
This patch implements that and adds a test for the case of calling
registers_changed_ptid with a pid-like ptid.
[1] https://sourceware.org/pipermail/gdb-patches/2020-August/171222.html
gdb/ChangeLog:
* regcache.c (pid_ptid_regcache_map): New type.
(target_ptid_regcache_map): Remove.
(target_pid_ptid_regcache_map): New type.
(regcaches): Change type to target_pid_ptid_regcache_map.
(get_thread_arch_aspace_regcache): Update.
(regcache_thread_ptid_changed): Update, handle pid-like ptid
case.
(regcaches_size): Update.
(regcache_count): Update.
(registers_changed_ptid_target_pid_test): New.
(_initialize_regcache): Register new test.
Change-Id: I4c46e26d8225c177dbac9488b549eff4c68fa0d8
