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llvm-project/compiler-rt/lib/asan
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Alex Richardson ad294e572b [sanitizers] Fix interception of GLibc regexec 
Previously, on GLibc systems, the interceptor was calling __compat_regexec
(regexec@GLIBC_2.2.5) insead of the newer __regexec (regexec@GLIBC_2.3.4).
The __compat_regexec strips the REG_STARTEND flag but does not report an
error if other flags are present. This can result in infinite loops for
programs that use REG_STARTEND to find all matches inside a buffer (since
ignoring REG_STARTEND means that the search always starts from the first
character).

The underlying issue is that GLibc's dlsym(RTLD_NEXT, ...) appears to
always return the oldest versioned symbol instead of the default. This
means it does not match the behaviour of dlsym(RTLD_DEFAULT, ...) or the
behaviour documented in the manpage.

It appears a similar issue was encountered with realpath and worked around
in 77ef78a0a5dbaa364529bd05ed7a7bd9a71dd8d4.

See also https://sourceware.org/bugzilla/show_bug.cgi?id=14932 and
https://sourceware.org/bugzilla/show_bug.cgi?id=1319.

Fixes https://github.com/google/sanitizers/issues/1371

Reviewed By: #sanitizers, vitalybuka, marxin

Differential Revision: https://reviews.llvm.org/D96348
2021-03-08 10:53:55 +00:00
..
scripts
[RISCV][ASAN] mark asan as supported for RISCV64 and enable tests
2020-10-05 10:38:30 +03:00
tests
[sanitizer] Define SANITIZER_GLIBC to refine SANITIZER_LINUX feature detection and support musl
2021-01-06 10:55:40 -08:00
.clang-format
[sanitizer] Remove unneeded blank lines
2018-05-09 00:44:26 +00:00
asan_activation_flags.inc
Update the file headers across all of the LLVM projects in the monorepo
2019-01-19 08:50:56 +00:00
asan_activation.cpp
compiler-rt: Rename .cc file in lib/asan to .cpp
2019-08-01 13:43:28 +00:00
asan_activation.h
Update the file headers across all of the LLVM projects in the monorepo
2019-01-19 08:50:56 +00:00
asan_allocator.cpp
[ASan] Stop blocking child thread progress from parent thread in pthread_create interceptor.
2021-01-22 23:34:43 -08:00
asan_allocator.h
[RISCV][ASAN] support code for architecture-specific parts of asan
2020-10-04 15:21:48 +03:00
asan_blacklist.txt
…
asan_debugging.cpp
Update compiler-rt cpplint.py
2019-09-11 21:33:06 +00:00
asan_descriptions.cpp
compiler-rt: Rename .cc file in lib/asan to .cpp
2019-08-01 13:43:28 +00:00
asan_descriptions.h
Update compiler-rt cpplint.py
2019-09-11 21:33:06 +00:00
asan_errors.cpp
[compiler-rt] Use GetNextInstructionPc in signal handlers
2019-10-02 21:20:37 +00:00
asan_errors.h
Reland "[ASan] Do not misrepresent high value address dereferences as null dereferences"
2019-10-10 17:19:58 +00:00
asan_fake_stack.cpp
compiler-rt: Rename .cc file in lib/asan to .cpp
2019-08-01 13:43:28 +00:00
asan_fake_stack.h
compiler-rt: Rename .cc file in lib/asan to .cpp
2019-08-01 13:43:28 +00:00
asan_flags.cpp
[sanitizers] Remove unneeded MaybeCall*DefaultOptions() and nullptr checks
2020-09-08 10:12:05 -07:00
asan_flags.h
Update the file headers across all of the LLVM projects in the monorepo
2019-01-19 08:50:56 +00:00
asan_flags.inc
[compiler-rt] Better lint output for .inc files
2019-09-12 01:35:09 +00:00
asan_fuchsia.cpp
[sanitizer_common] Use zx_system_get_page_size() on Fuchsia
2021-02-03 10:45:46 -08:00
asan_globals_win.cpp
Remove NOLINTs from compiler-rt
2019-09-11 23:19:48 +00:00
asan_globals.cpp
Remove NOLINTs from compiler-rt
2019-09-11 23:19:48 +00:00
asan_init_version.h
Update the file headers across all of the LLVM projects in the monorepo
2019-01-19 08:50:56 +00:00
asan_interceptors_memintrinsics.cpp
Remove NOLINTs from compiler-rt
2019-09-11 23:19:48 +00:00
asan_interceptors_memintrinsics.h
Remove a few straggler ".cc"s in compiler-rt/lib
2019-08-01 17:53:25 +00:00
asan_interceptors_vfork.S
[RISCV][ASAN] implementation for vfork interceptor for riscv64
2020-09-22 22:23:29 -07:00
asan_interceptors.cpp
[sanitizers] Fix interception of GLibc regexec
2021-03-08 10:53:55 +00:00
asan_interceptors.h
[sanitizers] Fix interception of GLibc regexec
2021-03-08 10:53:55 +00:00
asan_interface_internal.h
[sanitizers] Remove unneeded MaybeCall*DefaultOptions() and nullptr checks
2020-09-08 10:12:05 -07:00
asan_interface.inc
[asan] Provide an interface to update an allocation stack trace.
2019-10-31 13:54:46 -07:00
asan_internal.h
Revert "[lsan] On Fuchsia, don't use atexit hook for leak checks"
2020-09-23 21:10:56 +02:00
asan_linux.cpp
[asan][memprof] Declare _DYNAMIC and fix -Wparentheses
2020-12-27 20:28:59 -08:00
asan_lock.h
…
asan_mac.cpp
[compiler-rt][asan] decommit shadow memory for unmaps in fuchsia.
2020-07-21 11:07:47 -07:00
asan_malloc_linux.cpp
[compiler-rt] Replace INLINE with inline
2020-09-17 16:24:20 +02:00
asan_malloc_local.h
[compiler-rt] Replace INLINE with inline
2020-09-17 16:24:20 +02:00
asan_malloc_mac.cpp
compiler-rt: Rename .cc file in lib/asan to .cpp
2019-08-01 13:43:28 +00:00
asan_malloc_win.cpp
Remove unused variables, as suggested by @mcgov.
2019-11-04 14:55:51 -05:00
asan_mapping_myriad.h
Update the file headers across all of the LLVM projects in the monorepo
2019-01-19 08:50:56 +00:00
asan_mapping_sparc64.h
[asan] Dedup MemToShadowSize
2020-07-17 02:40:08 -07:00
asan_mapping.h
[RISCV][ASAN] support code for architecture-specific parts of asan
2020-10-04 15:21:48 +03:00
asan_memory_profile.cpp
compiler-rt: Rename .cc file in lib/asan to .cpp
2019-08-01 13:43:28 +00:00
asan_new_delete.cpp
Remove NOLINTs from compiler-rt
2019-09-11 23:19:48 +00:00
asan_poisoning.cpp
[asan] Increase CHECK limit in __sanitizer_annotate_contiguous_container
2021-02-23 22:14:42 -08:00
asan_poisoning.h
[ASan] Use __sanitizer_fill_shadow for FastPoisonShadow on Fuchsia
2019-07-11 07:30:11 +00:00
asan_posix.cpp
[Sanitizer][NFC] Fix typo
2021-03-01 23:47:03 +00:00
asan_preinit.cpp
compiler-rt: Rename .cc file in lib/asan to .cpp
2019-08-01 13:43:28 +00:00
asan_premap_shadow.cpp
[compiler-rt][asan][hwasan] Refactor shadow setup into sanitizer_common (NFCI)
2020-07-16 11:47:05 -07:00
asan_premap_shadow.h
Update the file headers across all of the LLVM projects in the monorepo
2019-01-19 08:50:56 +00:00
asan_report.cpp
[sanitizer] Convert PrintModuleMap to DumpProcessMap
2020-10-21 12:46:49 -07:00
asan_report.h
[sanitizer] Implement reallocarray.
2019-05-01 17:33:01 +00:00
asan_rtems.cpp
[compiler-rt][asan] decommit shadow memory for unmaps in fuchsia.
2020-07-21 11:07:47 -07:00
asan_rtl.cpp
[sanitizer] Convert PrintModuleMap to DumpProcessMap
2020-10-21 12:46:49 -07:00
asan_scariness_score.h
[compiler-rt] Remove some cpplint filters
2019-09-12 02:20:36 +00:00
asan_shadow_setup.cpp
[RISCV][ASAN] support code for architecture-specific parts of asan
2020-10-04 15:21:48 +03:00
asan_stack.cpp
compiler-rt: Rename .cc file in lib/asan to .cpp
2019-08-01 13:43:28 +00:00
asan_stack.h
[NFC][Asan] Remove unused macro
2020-10-11 22:29:51 -07:00
asan_stats.cpp
Remove NOLINTs from compiler-rt
2019-09-11 23:19:48 +00:00
asan_stats.h
Revert r369472 and r369441
2019-08-21 05:06:21 +00:00
asan_suppressions.cpp
Remove NOLINTs from compiler-rt
2019-09-11 23:19:48 +00:00
asan_suppressions.h
compiler-rt: Rename .cc file in lib/asan to .cpp
2019-08-01 13:43:28 +00:00
asan_thread.cpp
[asan] Fix pthread_create interceptor
2021-02-03 12:57:56 -08:00
asan_thread.h
[ASan] Stop blocking child thread progress from parent thread in pthread_create interceptor.
2021-01-22 23:34:43 -08:00
asan_win_dll_thunk.cpp
Remove NOLINTs from compiler-rt
2019-09-11 23:19:48 +00:00
asan_win_dynamic_runtime_thunk.cpp
Remove NOLINTs from compiler-rt
2019-09-11 23:19:48 +00:00
asan_win_weak_interception.cpp
compiler-rt: Rename .cc file in lib/asan to .cpp
2019-08-01 13:43:28 +00:00
asan_win.cpp
[ASan] Fix broken Windows build due to 596d534ac3524052df210be8d3c01a33b2260a42.
2021-01-23 09:09:06 -08:00
asan.syms.extra
…
CMakeLists.txt
[CMake] Remove cxx-headers from runtime deps
2020-10-30 20:03:38 -07:00
README.txt
…
weak_symbols.txt
…

README.txt 

AddressSanitizer RT
================================
This directory contains sources of the AddressSanitizer (ASan) runtime library.

Directory structure:
README.txt       : This file.
Makefile.mk      : File for make-based build.
CMakeLists.txt   : File for cmake-based build.
asan_*.{cc,h}    : Sources of the asan runtime library.
scripts/*        : Helper scripts.
tests/*          : ASan unit tests.

Also ASan runtime needs the following libraries:
lib/interception/      : Machinery used to intercept function calls.
lib/sanitizer_common/  : Code shared between various sanitizers.

ASan runtime currently also embeds part of LeakSanitizer runtime for
leak detection (lib/lsan/lsan_common.{cc,h}).

ASan runtime can only be built by CMake. You can run ASan tests
from the root of your CMake build tree:

make check-asan

For more instructions see:
https://github.com/google/sanitizers/wiki/AddressSanitizerHowToBuild