head 1.4; access; symbols netbsd-11-0-RC4:1.3 netbsd-11-0-RC3:1.3 netbsd-11-0-RC2:1.3 netbsd-11-0-RC1:1.3 gcc-14-3-0:1.1.1.3 perseant-exfatfs-base-20250801:1.3 netbsd-11:1.3.0.4 netbsd-11-base:1.3 gcc-12-5-0:1.1.1.2 perseant-exfatfs-base-20240630:1.3 gcc-12-4-0:1.1.1.2 perseant-exfatfs:1.3.0.2 perseant-exfatfs-base:1.3 gcc-12-3-0:1.1.1.2 gcc-10-5-0:1.1.1.1 gcc-10-4-0:1.1.1.1 cjep_sun2x:1.2.0.4 cjep_sun2x-base:1.2 cjep_staticlib_x-base1:1.2 cjep_staticlib_x:1.2.0.2 cjep_staticlib_x-base:1.2 gcc-10-3-0:1.1.1.1 FSF:1.1.1; locks; strict; comment @// @; 1.4 date 2025.09.14.00.08.55; author mrg; state Exp; branches; next 1.3; commitid x9D5QEnvbeMI4CaG; 1.3 date 2023.07.31.01.44.54; author mrg; state Exp; branches; next 1.2; commitid q79F5Opf0FLsyTyE; 1.2 date 2021.04.11.23.54.25; author mrg; state dead; branches; next 1.1; commitid wJn7ggfUTEMOWVOC; 1.1 date 2021.04.10.22.09.22; author mrg; state Exp; branches 1.1.1.1; next ; commitid eC4g0MRpqTvEkNOC; 1.1.1.1 date 2021.04.10.22.09.22; author mrg; state Exp; branches; next 1.1.1.2; commitid eC4g0MRpqTvEkNOC; 1.1.1.2 date 2023.07.30.05.20.41; author mrg; state Exp; branches; next 1.1.1.3; commitid tk6nV4mbc9nVEMyE; 1.1.1.3 date 2025.09.13.23.45.04; author mrg; state Exp; branches; next ; commitid KwhwN4krNWa6XBaG; desc @@ 1.4 log @merge GCC 14.3.0. @ text @//===-- asan_posix.cpp ----------------------------------------------------===// // // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. // See https://llvm.org/LICENSE.txt for license information. // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception // //===----------------------------------------------------------------------===// // // This file is a part of AddressSanitizer, an address sanity checker. // // Posix-specific details. //===----------------------------------------------------------------------===// #include "sanitizer_common/sanitizer_platform.h" #if SANITIZER_POSIX # include # include # include # include # include # include # include "asan_interceptors.h" # include "asan_internal.h" # include "asan_mapping.h" # include "asan_poisoning.h" # include "asan_report.h" # include "asan_stack.h" # include "lsan/lsan_common.h" # include "sanitizer_common/sanitizer_libc.h" # include "sanitizer_common/sanitizer_posix.h" # include "sanitizer_common/sanitizer_procmaps.h" namespace __asan { void AsanOnDeadlySignal(int signo, void *siginfo, void *context) { StartReportDeadlySignal(); SignalContext sig(siginfo, context); ReportDeadlySignal(sig); } bool PlatformUnpoisonStacks() { stack_t signal_stack; CHECK_EQ(0, sigaltstack(nullptr, &signal_stack)); uptr sigalt_bottom = (uptr)signal_stack.ss_sp; uptr sigalt_top = (uptr)((char *)signal_stack.ss_sp + signal_stack.ss_size); // If we're executing on the signal alternate stack AND the Linux flag // SS_AUTODISARM was used, then we cannot get the signal alternate stack // bounds from sigaltstack -- sigaltstack's output looks just as if no // alternate stack has ever been set up. // We're always unpoisoning the signal alternate stack to support jumping // between the default stack and signal alternate stack. if (signal_stack.ss_flags != SS_DISABLE) UnpoisonStack(sigalt_bottom, sigalt_top, "sigalt"); if (signal_stack.ss_flags != SS_ONSTACK) return false; // Since we're on the signal alternate stack, we cannot find the DEFAULT // stack bottom using a local variable. uptr default_bottom, tls_addr, tls_size, stack_size; GetThreadStackAndTls(/*main=*/false, &default_bottom, &stack_size, &tls_addr, &tls_size); UnpoisonStack(default_bottom, default_bottom + stack_size, "default"); return true; } // ---------------------- TSD ---------------- {{{1 #if SANITIZER_NETBSD && !ASAN_DYNAMIC // Thread Static Data cannot be used in early static ASan init on NetBSD. // Reuse the Asan TSD API for compatibility with existing code // with an alternative implementation. static void (*tsd_destructor)(void *tsd) = nullptr; struct tsd_key { tsd_key() : key(nullptr) {} ~tsd_key() { CHECK(tsd_destructor); if (key) (*tsd_destructor)(key); } void *key; }; static thread_local struct tsd_key key; void AsanTSDInit(void (*destructor)(void *tsd)) { CHECK(!tsd_destructor); tsd_destructor = destructor; } void *AsanTSDGet() { CHECK(tsd_destructor); return key.key; } void AsanTSDSet(void *tsd) { CHECK(tsd_destructor); CHECK(tsd); CHECK(!key.key); key.key = tsd; } void PlatformTSDDtor(void *tsd) { CHECK(tsd_destructor); CHECK_EQ(key.key, tsd); key.key = nullptr; // Make sure that signal handler can not see a stale current thread pointer. atomic_signal_fence(memory_order_seq_cst); AsanThread::TSDDtor(tsd); } #else static pthread_key_t tsd_key; static bool tsd_key_inited = false; void AsanTSDInit(void (*destructor)(void *tsd)) { CHECK(!tsd_key_inited); tsd_key_inited = true; CHECK_EQ(0, pthread_key_create(&tsd_key, destructor)); } void *AsanTSDGet() { CHECK(tsd_key_inited); return pthread_getspecific(tsd_key); } void AsanTSDSet(void *tsd) { CHECK(tsd_key_inited); pthread_setspecific(tsd_key, tsd); } void PlatformTSDDtor(void *tsd) { AsanThreadContext *context = (AsanThreadContext *)tsd; if (context->destructor_iterations > 1) { context->destructor_iterations--; CHECK_EQ(0, pthread_setspecific(tsd_key, tsd)); return; } # if SANITIZER_FREEBSD || SANITIZER_LINUX || SANITIZER_NETBSD || \ SANITIZER_SOLARIS // After this point it's unsafe to execute signal handlers which may be // instrumented. It's probably not just a Linux issue. BlockSignals(); # endif AsanThread::TSDDtor(tsd); } #endif void InstallAtExitCheckLeaks() { if (CAN_SANITIZE_LEAKS) { if (common_flags()->detect_leaks && common_flags()->leak_check_at_exit) { if (flags()->halt_on_error) Atexit(__lsan::DoLeakCheck); else Atexit(__lsan::DoRecoverableLeakCheckVoid); } } } } // namespace __asan #endif // SANITIZER_POSIX @ 1.3 log @make this actually be GCC 12.3.0's libsanitizer. the libsanitizer we used with GCC 9 and GCC 10 was significantly ahead of the GCC 9 and GCC 10 provided versions. @ text @d17 17 a33 16 #include "asan_internal.h" #include "asan_interceptors.h" #include "asan_mapping.h" #include "asan_poisoning.h" #include "asan_report.h" #include "asan_stack.h" #include "sanitizer_common/sanitizer_libc.h" #include "sanitizer_common/sanitizer_posix.h" #include "sanitizer_common/sanitizer_procmaps.h" #include #include #include #include #include #include d135 1 a135 1 AsanThreadContext *context = (AsanThreadContext*)tsd; d141 6 d150 12 @ 1.2 log @revert sanitizer back to the version we were using with GCC 9, since that one was already newer than the GCC 10 version. @ text @d20 1 d28 1 d42 26 @ 1.1 log @Initial revision @ text @@ 1.1.1.1 log @initial import of GCC 10.3.0. main changes include: caveats: - ABI issue between c++14 and c++17 fixed - profile mode is removed from libstdc++ - -fno-common is now the default new features: - new flags -fallocation-dce, -fprofile-partial-training, -fprofile-reproducible, -fprofile-prefix-path, and -fanalyzer - many new compile and link time optimisations - enhanced drive optimisations - openacc 2.6 support - openmp 5.0 features - new warnings: -Wstring-compare and -Wzero-length-bounds - extended warnings: -Warray-bounds, -Wformat-overflow, -Wrestrict, -Wreturn-local-addr, -Wstringop-overflow, -Warith-conversion, -Wmismatched-tags, and -Wredundant-tags - some likely C2X features implemented - more C++20 implemented - many new arm & intel CPUs known hundreds of reported bugs are fixed. full list of changes can be found at: https://gcc.gnu.org/gcc-10/changes.html @ text @@ 1.1.1.2 log @initial import of GCC 12.3.0. major changes in GCC 11 included: - The default mode for C++ is now -std=gnu++17 instead of -std=gnu++14. - When building GCC itself, the host compiler must now support C++11, rather than C++98. - Some short options of the gcov tool have been renamed: -i to -j and -j to -H. - ThreadSanitizer improvements. - Introduce Hardware-assisted AddressSanitizer support. - For targets that produce DWARF debugging information GCC now defaults to DWARF version 5. This can produce up to 25% more compact debug information compared to earlier versions. - Many optimisations. - The existing malloc attribute has been extended so that it can be used to identify allocator/deallocator API pairs. A pair of new -Wmismatched-dealloc and -Wmismatched-new-delete warnings are added. - Other new warnings: -Wsizeof-array-div, enabled by -Wall, warns about divisions of two sizeof operators when the first one is applied to an array and the divisor does not equal the size of the array element. -Wstringop-overread, enabled by default, warns about calls to string functions reading past the end of the arrays passed to them as arguments. -Wtsan, enabled by default, warns about unsupported features in ThreadSanitizer (currently std::atomic_thread_fence). - Enchanced warnings: -Wfree-nonheap-object detects many more instances of calls to deallocation functions with pointers not returned from a dynamic memory allocation function. -Wmaybe-uninitialized diagnoses passing pointers or references to uninitialized memory to functions taking const-qualified arguments. -Wuninitialized detects reads from uninitialized dynamically allocated memory. -Warray-parameter warns about functions with inconsistent array forms. -Wvla-parameter warns about functions with inconsistent VLA forms. - Several new features from the upcoming C2X revision of the ISO C standard are supported with -std=c2x and -std=gnu2x. - Several C++20 features have been implemented. - The C++ front end has experimental support for some of the upcoming C++23 draft. - Several new C++ warnings. - Enhanced Arm, AArch64, x86, and RISC-V CPU support. - The implementation of how program state is tracked within -fanalyzer has been completely rewritten with many enhancements. see https://gcc.gnu.org/gcc-11/changes.html for a full list. major changes in GCC 12 include: - An ABI incompatibility between C and C++ when passing or returning by value certain aggregates containing zero width bit-fields has been discovered on various targets. x86-64, ARM and AArch64 will always ignore them (so there is a C ABI incompatibility between GCC 11 and earlier with GCC 12 or later), PowerPC64 ELFv2 always take them into account (so there is a C++ ABI incompatibility, GCC 4.4 and earlier compatible with GCC 12 or later, incompatible with GCC 4.5 through GCC 11). RISC-V has changed the handling of these already starting with GCC 10. As the ABI requires, MIPS takes them into account handling function return values so there is a C++ ABI incompatibility with GCC 4.5 through 11. - STABS: Support for emitting the STABS debugging format is deprecated and will be removed in the next release. All ports now default to emit DWARF (version 2 or later) debugging info or are obsoleted. - Vectorization is enabled at -O2 which is now equivalent to the original -O2 -ftree-vectorize -fvect-cost-model=very-cheap. - GCC now supports the ShadowCallStack sanitizer. - Support for __builtin_shufflevector compatible with the clang language extension was added. - Support for attribute unavailable was added. - Support for __builtin_dynamic_object_size compatible with the clang language extension was added. - New warnings: -Wbidi-chars warns about potentially misleading UTF-8 bidirectional control characters. -Warray-compare warns about comparisons between two operands of array type. - Some new features from the upcoming C2X revision of the ISO C standard are supported with -std=c2x and -std=gnu2x. - Several C++23 features have been implemented. - Many C++ enhancements across warnings and -f options. see https://gcc.gnu.org/gcc-12/changes.html for a full list. @ text @a19 1 #include "asan_poisoning.h" a26 1 #include a39 26 bool PlatformUnpoisonStacks() { stack_t signal_stack; CHECK_EQ(0, sigaltstack(nullptr, &signal_stack)); uptr sigalt_bottom = (uptr)signal_stack.ss_sp; uptr sigalt_top = (uptr)((char *)signal_stack.ss_sp + signal_stack.ss_size); // If we're executing on the signal alternate stack AND the Linux flag // SS_AUTODISARM was used, then we cannot get the signal alternate stack // bounds from sigaltstack -- sigaltstack's output looks just as if no // alternate stack has ever been set up. // We're always unpoisoning the signal alternate stack to support jumping // between the default stack and signal alternate stack. if (signal_stack.ss_flags != SS_DISABLE) UnpoisonStack(sigalt_bottom, sigalt_top, "sigalt"); if (signal_stack.ss_flags != SS_ONSTACK) return false; // Since we're on the signal alternate stack, we cannot find the DEFAULT // stack bottom using a local variable. uptr default_bottom, tls_addr, tls_size, stack_size; GetThreadStackAndTls(/*main=*/false, &default_bottom, &stack_size, &tls_addr, &tls_size); UnpoisonStack(default_bottom, default_bottom + stack_size, "default"); return true; } @ 1.1.1.3 log @initial import of GCC 14.3.0. major changes in GCC 13: - improved sanitizer - zstd debug info compression - LTO improvements - SARIF based diagnostic support - new warnings: -Wxor-used-as-pow, -Wenum-int-mismatch, -Wself-move, -Wdangling-reference - many new -Wanalyzer* specific warnings - enhanced warnings: -Wpessimizing-move, -Wredundant-move - new attributes to mark file descriptors, c++23 "assume" - several C23 features added - several C++23 features added - many new features for Arm, x86, RISC-V major changes in GCC 14: - more strict C99 or newer support - ia64* marked deprecated (but seemingly still in GCC 15.) - several new hardening features - support for "hardbool", which can have user supplied values of true/false - explicit support for stack scrubbing upon function exit - better auto-vectorisation support - added clang-compatible __has_feature and __has_extension - more C23, including -std=c23 - several C++26 features added - better diagnostics in C++ templates - new warnings: -Wnrvo, Welaborated-enum-base - many new features for Arm, x86, RISC-V - possible ABI breaking change for SPARC64 and small structures with arrays of floats. @ text @d17 16 a32 17 # include # include # include # include # include # include # include "asan_interceptors.h" # include "asan_internal.h" # include "asan_mapping.h" # include "asan_poisoning.h" # include "asan_report.h" # include "asan_stack.h" # include "lsan/lsan_common.h" # include "sanitizer_common/sanitizer_libc.h" # include "sanitizer_common/sanitizer_posix.h" # include "sanitizer_common/sanitizer_procmaps.h" d134 1 a134 1 AsanThreadContext *context = (AsanThreadContext *)tsd; a139 6 # if SANITIZER_FREEBSD || SANITIZER_LINUX || SANITIZER_NETBSD || \ SANITIZER_SOLARIS // After this point it's unsafe to execute signal handlers which may be // instrumented. It's probably not just a Linux issue. BlockSignals(); # endif a142 12 void InstallAtExitCheckLeaks() { if (CAN_SANITIZE_LEAKS) { if (common_flags()->detect_leaks && common_flags()->leak_check_at_exit) { if (flags()->halt_on_error) Atexit(__lsan::DoLeakCheck); else Atexit(__lsan::DoRecoverableLeakCheckVoid); } } } @