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binutils-gdb/gdbsupport
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Jan Kratochvil 5fff6115fe Fix LD_PRELOAD=/usr/lib64/libasan.so.6 gdb 
Currently for a binary compiled normally (without -fsanitize=address) but with
LD_PRELOAD of ASAN one gets:

$ ASAN_OPTIONS=detect_leaks=0:alloc_dealloc_mismatch=1:abort_on_error=1:fast_unwind_on_malloc=0 LD_PRELOAD=/usr/lib64/libasan.so.6 gdb
=================================================================
==1909567==ERROR: AddressSanitizer: alloc-dealloc-mismatch (malloc vs operator delete []) on 0x602000001570
    #0 0x7f1c98e5efa7 in operator delete[](void*) (/usr/lib64/libasan.so.6+0xb0fa7)
...
0x602000001570 is located 0 bytes inside of 2-byte region [0x602000001570,0x602000001572)
allocated by thread T0 here:
    #0 0x7f1c98e5cd1f in __interceptor_malloc (/usr/lib64/libasan.so.6+0xaed1f)
    #1 0x557ee4a42e81 in operator new(unsigned long) (/usr/libexec/gdb+0x74ce81)
SUMMARY: AddressSanitizer: alloc-dealloc-mismatch (/usr/lib64/libasan.so.6+0xb0fa7) in operator delete[](void*)
==1909567==HINT: if you don't care about these errors you may set ASAN_OPTIONS=alloc_dealloc_mismatch=0
==1909567==ABORTING

Despite the code called properly operator new[] and operator delete[].
But GDB's new-op.cc provides its own operator new[] which gets translated into
malloc() (which gets recogized as operatore new(size_t)) but as it does not
translate also operators delete[] Address Sanitizer gets confused.

The question is how many variants of the delete operator need to be provided.
There could be 14 operators new but there are only 4, GDB uses 3 of them.
There could be 16 operators delete but there are only 6, GDB uses 2 of them.
It depends on libraries and compiler which of the operators will get used.
Currently being used:
                 U operator new[](unsigned long)
                 U operator new(unsigned long)
                 U operator new(unsigned long, std::nothrow_t const&)
                 U operator delete[](void*)
                 U operator delete(void*, unsigned long)

Tested on x86_64-linux.
2021-11-03 11:29:18 +01:00
..
.dir-locals.el gdb: additional settings for emacs in .dir-locals.el 2021-05-17 20:47:46 +01:00
.gitattributes gdb, gdbserver, gdbsupport: add .gitattributes files 2020-03-05 15:59:22 +01:00
acinclude.m4 gdb: move ptrace.m4 to gdbsupport 2020-10-25 21:08:49 -04:00
aclocal.m4 gdb: use AC_PROG_CC_STDC instead of AM_PROG_CC_STDC 2020-10-31 08:30:57 -04:00
agent.cc Remove defaulted 'tid' parameter to ptid_t constructor 2021-09-23 09:30:54 -06:00
agent.h Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
alt-stack.h Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
array-view.h gdbsupport: add assertions in array_view 2021-10-25 14:51:44 -04:00
ax.def Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
block-signals.h Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
break-common.h Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
btrace-common.cc Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
btrace-common.h Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
buffer.cc Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
buffer.h Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
byte-vector.h Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
ChangeLog-2020-2021 gdb: move remaining ChangeLogs to legacy files 2021-07-26 12:20:33 +01:00
check-defines.el Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
cleanups.cc Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
cleanups.h Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
common-debug.cc gdb: add remote_debug_printf 2021-01-22 12:43:27 -05:00
common-debug.h gdbsupport: allow passing format string to scoped_debug_start_end 2021-04-24 19:26:41 -04:00
common-defs.h [gdb/build] Disable attribute nonnull 2021-07-30 14:07:40 +02:00
common-exceptions.cc Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
common-exceptions.h Replace exception_print_same with operator!= 2021-07-30 08:42:39 -06:00
common-gdbthread.h Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
common-inferior.cc Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
common-inferior.h gdb: make inferior::m_cwd an std::string 2021-07-23 15:38:54 -04:00
common-regcache.cc Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
common-regcache.h Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
common-types.h Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
common-utils.cc New memory-tag commands 2021-03-24 14:57:53 -03:00
common-utils.h New memory-tag commands 2021-03-24 14:57:53 -03:00
common.m4 Fix format_pieces selftest on Windows 2021-10-19 13:14:48 -06:00
config.in Fix format_pieces selftest on Windows 2021-10-19 13:14:48 -06:00
configure Fix format_pieces selftest on Windows 2021-10-19 13:14:48 -06:00
configure.ac gdbsupport: remove attempt to define TARGET_WORD_SIZE 2021-10-04 10:52:35 +01:00
create-version.sh Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
def-vector.h Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
default-init-alloc.h Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
eintr.h Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
enum-flags.h Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
environ.cc Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
environ.h Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
errors.cc Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
errors.h Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
event-loop.cc Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
event-loop.h Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
fileio.cc Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
fileio.h Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
filestuff.cc gdbsupport: make gdb_open_cloexec return scoped_fd 2021-09-30 15:21:48 -04:00
filestuff.h gdbsupport: make gdb_mkostemp_cloexec return a scoped_fd 2021-09-30 15:21:48 -04:00
filtered-iterator.h Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
format.cc Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
format.h Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
forward-scope-exit.h Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
function-view.h Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
gdb-dlfcn.cc Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
gdb-dlfcn.h Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
gdb-safe-ctype.h Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
gdb-sigmask.h Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
gdb_assert.h Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
gdb_binary_search.h Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
gdb_file.h gdbsupport: move gdb_file_up to its own file 2021-09-30 15:21:48 -04:00
gdb_locale.h Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
gdb_optional.h gdbsupport: add debug assertions in gdb::optional::get 2021-08-03 08:50:56 -04:00
gdb_proc_service.h gdbsupport/gdb_proc_service.h: use decltype instead of typeof 2021-09-20 07:59:53 -04:00
gdb_ref_ptr.h Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
gdb_select.h Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
gdb_setjmp.h Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
gdb_signals.h Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
gdb_splay_tree.h Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
gdb_string_view.h Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
gdb_string_view.tcc Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
gdb_sys_time.h Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
gdb_tilde_expand.cc Improve gdb_tilde_expand logic. 2021-01-23 17:17:38 +00:00
gdb_tilde_expand.h Improve gdb_tilde_expand logic. 2021-01-23 17:17:38 +00:00
gdb_unique_ptr.h Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
gdb_unlinker.h Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
gdb_vecs.cc Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
gdb_vecs.h Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
gdb_wait.cc Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
gdb_wait.h Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
hash_enum.h Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
host-defs.h Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
intrusive_list.h gdb: use intrusive list for step-over chain 2021-07-12 20:46:52 -04:00
iterator-range.h gdb: introduce iterator_range, remove next_adapter 2021-07-06 15:02:05 -04:00
job-control.cc Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
job-control.h Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
Makefile.am Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
Makefile.in gdbsupport: re-generate configure & friends 2021-05-08 21:27:49 -04:00
netstuff.cc Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
netstuff.h Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
new-op.cc Fix LD_PRELOAD=/usr/lib64/libasan.so.6 gdb 2021-11-03 11:29:18 +01:00
next-iterator.h gdb: introduce iterator_range, remove next_adapter 2021-07-06 15:02:05 -04:00
observable.h gdbsupport: allow to specify dependencies between observers 2021-04-27 11:22:32 -04:00
offset-type.h Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
parallel-for.h Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
pathstuff.cc gdb: check for empty strings in get_standard_cache_dir/get_standard_config_dir 2021-01-08 13:46:56 -05:00
pathstuff.h Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
poison.h Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
preprocessor.h Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
print-utils.cc Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
print-utils.h Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
ptid.cc Change ptid_t::tid to ULONGEST 2021-09-23 09:30:54 -06:00
ptid.h Change ptid_t::tid to ULONGEST 2021-09-23 09:30:54 -06:00
ptrace.m4 Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
README
refcounted-object.h Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
reference-to-pointer-iterator.h gdb: use intrusive list for step-over chain 2021-07-12 20:46:52 -04:00
rsp-low.cc New memory-tag commands 2021-03-24 14:57:53 -03:00
rsp-low.h New memory-tag commands 2021-03-24 14:57:53 -03:00
run-time-clock.cc Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
run-time-clock.h Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
safe-iterator.h gdb: make all_inferiors_safe actually work 2021-07-17 08:54:40 -04:00
safe-strerror.cc Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
scope-exit.h Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
scoped_fd.h gdbsupport: move gdb_file_up to its own file 2021-09-30 15:21:48 -04:00
scoped_ignore_signal.h gdb: fall back on sigpending + sigwait if sigtimedwait is not available 2021-07-05 09:54:58 -04:00
scoped_ignore_sigttou.h Don't call sigtimedwait for scoped_ignore_sigttou 2021-06-17 19:39:08 +01:00
scoped_mmap.cc gdbsupport: make gdb_open_cloexec return scoped_fd 2021-09-30 15:21:48 -04:00
scoped_mmap.h Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
scoped_restore.h Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
search.cc Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
search.h Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
selftest.cc Always use std::function for self-tests 2021-10-19 12:58:50 -06:00
selftest.h gdb: add selftest name completion 2021-10-28 11:17:45 -04:00
selftest.m4 Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
signals-state-save-restore.cc Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
signals-state-save-restore.h Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
signals.cc Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
symbol.h Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
tdesc.cc Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
tdesc.h Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
thread-pool.cc Use rvalue reference in thread_pool::post_task 2021-04-30 10:04:56 -06:00
thread-pool.h Use rvalue reference in thread_pool::post_task 2021-04-30 10:04:56 -06:00
traits.h Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
underlying.h Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
valid-expr.h Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
version.h Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
warning.m4 Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
x86-xstate.h Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
xml-utils.cc Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00
xml-utils.h Update copyright year range in all GDB files 2021-01-01 12:12:21 +04:00

README 

This is a helper library that is used by gdb and gdbserver.

To send patches, follow the gdb patch submission instructions in
../gdb/CONTRIBUTE.  For maintainers, see ../gdb/MAINTAINERS.