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branch	1.1.1;
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	perseant-exfatfs-base:1.1.1.1
	gcc-12-3-0:1.1.1.1
	FSF:1.1.1;
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comment	@# @;


1.1
date	2023.07.30.05.20.41;	author mrg;	state Exp;
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	1.1.1.1;
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1.1.1.1
date	2023.07.30.05.20.41;	author mrg;	state Exp;
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	1.1.1.1.2.1;
next	1.1.1.2;
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1.1.1.2
date	2025.09.13.23.45.04;	author mrg;	state Exp;
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1.1.1.1.2.1
date	2026.11.04.22.51.26;	author perseant;	state Exp;
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commitid	3QTNojfCEH9lUb2H;


desc
@@


1.1
log
@Initial revision
@
text
@//===-- tsan_interface.inc --------------------------------------*- C++ -*-===//
//
// 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 ThreadSanitizer (TSan), a race detector.
//
//===----------------------------------------------------------------------===//

#include "sanitizer_common/sanitizer_ptrauth.h"
#include "tsan_interface.h"
#include "tsan_rtl.h"

#define CALLERPC ((uptr)__builtin_return_address(0))

using namespace __tsan;

void __tsan_read1(void *addr) {
  MemoryAccess(cur_thread(), CALLERPC, (uptr)addr, 1, kAccessRead);
}

void __tsan_read2(void *addr) {
  MemoryAccess(cur_thread(), CALLERPC, (uptr)addr, 2, kAccessRead);
}

void __tsan_read4(void *addr) {
  MemoryAccess(cur_thread(), CALLERPC, (uptr)addr, 4, kAccessRead);
}

void __tsan_read8(void *addr) {
  MemoryAccess(cur_thread(), CALLERPC, (uptr)addr, 8, kAccessRead);
}

void __tsan_write1(void *addr) {
  MemoryAccess(cur_thread(), CALLERPC, (uptr)addr, 1, kAccessWrite);
}

void __tsan_write2(void *addr) {
  MemoryAccess(cur_thread(), CALLERPC, (uptr)addr, 2, kAccessWrite);
}

void __tsan_write4(void *addr) {
  MemoryAccess(cur_thread(), CALLERPC, (uptr)addr, 4, kAccessWrite);
}

void __tsan_write8(void *addr) {
  MemoryAccess(cur_thread(), CALLERPC, (uptr)addr, 8, kAccessWrite);
}

void __tsan_read1_pc(void *addr, void *pc) {
  MemoryAccess(cur_thread(), STRIP_PAC_PC(pc), (uptr)addr, 1, kAccessRead | kAccessExternalPC);
}

void __tsan_read2_pc(void *addr, void *pc) {
  MemoryAccess(cur_thread(), STRIP_PAC_PC(pc), (uptr)addr, 2, kAccessRead | kAccessExternalPC);
}

void __tsan_read4_pc(void *addr, void *pc) {
  MemoryAccess(cur_thread(), STRIP_PAC_PC(pc), (uptr)addr, 4, kAccessRead | kAccessExternalPC);
}

void __tsan_read8_pc(void *addr, void *pc) {
  MemoryAccess(cur_thread(), STRIP_PAC_PC(pc), (uptr)addr, 8, kAccessRead | kAccessExternalPC);
}

void __tsan_write1_pc(void *addr, void *pc) {
  MemoryAccess(cur_thread(), STRIP_PAC_PC(pc), (uptr)addr, 1, kAccessWrite | kAccessExternalPC);
}

void __tsan_write2_pc(void *addr, void *pc) {
  MemoryAccess(cur_thread(), STRIP_PAC_PC(pc), (uptr)addr, 2, kAccessWrite | kAccessExternalPC);
}

void __tsan_write4_pc(void *addr, void *pc) {
  MemoryAccess(cur_thread(), STRIP_PAC_PC(pc), (uptr)addr, 4, kAccessWrite | kAccessExternalPC);
}

void __tsan_write8_pc(void *addr, void *pc) {
  MemoryAccess(cur_thread(), STRIP_PAC_PC(pc), (uptr)addr, 8, kAccessWrite | kAccessExternalPC);
}

ALWAYS_INLINE USED void __tsan_unaligned_read2(const void *addr) {
  UnalignedMemoryAccess(cur_thread(), CALLERPC, (uptr)addr, 2, kAccessRead);
}

ALWAYS_INLINE USED void __tsan_unaligned_read4(const void *addr) {
  UnalignedMemoryAccess(cur_thread(), CALLERPC, (uptr)addr, 4, kAccessRead);
}

ALWAYS_INLINE USED void __tsan_unaligned_read8(const void *addr) {
  UnalignedMemoryAccess(cur_thread(), CALLERPC, (uptr)addr, 8, kAccessRead);
}

ALWAYS_INLINE USED void __tsan_unaligned_write2(void *addr) {
  UnalignedMemoryAccess(cur_thread(), CALLERPC, (uptr)addr, 2, kAccessWrite);
}

ALWAYS_INLINE USED void __tsan_unaligned_write4(void *addr) {
  UnalignedMemoryAccess(cur_thread(), CALLERPC, (uptr)addr, 4, kAccessWrite);
}

ALWAYS_INLINE USED void __tsan_unaligned_write8(void *addr) {
  UnalignedMemoryAccess(cur_thread(), CALLERPC, (uptr)addr, 8, kAccessWrite);
}

extern "C" {
// __sanitizer_unaligned_load/store are for user instrumentation.
SANITIZER_INTERFACE_ATTRIBUTE
u16 __sanitizer_unaligned_load16(const uu16 *addr) {
  __tsan_unaligned_read2(addr);
  return *addr;
}

SANITIZER_INTERFACE_ATTRIBUTE
u32 __sanitizer_unaligned_load32(const uu32 *addr) {
  __tsan_unaligned_read4(addr);
  return *addr;
}

SANITIZER_INTERFACE_ATTRIBUTE
u64 __sanitizer_unaligned_load64(const uu64 *addr) {
  __tsan_unaligned_read8(addr);
  return *addr;
}

SANITIZER_INTERFACE_ATTRIBUTE
void __sanitizer_unaligned_store16(uu16 *addr, u16 v) {
  *addr = v;
  __tsan_unaligned_write2(addr);
}

SANITIZER_INTERFACE_ATTRIBUTE
void __sanitizer_unaligned_store32(uu32 *addr, u32 v) {
  *addr = v;
  __tsan_unaligned_write4(addr);
}

SANITIZER_INTERFACE_ATTRIBUTE
void __sanitizer_unaligned_store64(uu64 *addr, u64 v) {
  *addr = v;
  __tsan_unaligned_write8(addr);
}
}

void __tsan_vptr_update(void **vptr_p, void *new_val) {
  if (*vptr_p == new_val)
    return;
  MemoryAccess(cur_thread(), CALLERPC, (uptr)vptr_p, sizeof(*vptr_p),
               kAccessWrite | kAccessVptr);
}

void __tsan_vptr_read(void **vptr_p) {
  MemoryAccess(cur_thread(), CALLERPC, (uptr)vptr_p, sizeof(*vptr_p),
               kAccessRead | kAccessVptr);
}

void __tsan_func_entry(void *pc) { FuncEntry(cur_thread(), STRIP_PAC_PC(pc)); }

void __tsan_func_exit() { FuncExit(cur_thread()); }

void __tsan_ignore_thread_begin() { ThreadIgnoreBegin(cur_thread(), CALLERPC); }

void __tsan_ignore_thread_end() { ThreadIgnoreEnd(cur_thread()); }

void __tsan_read_range(void *addr, uptr size) {
  MemoryAccessRange(cur_thread(), CALLERPC, (uptr)addr, size, false);
}

void __tsan_write_range(void *addr, uptr size) {
  MemoryAccessRange(cur_thread(), CALLERPC, (uptr)addr, size, true);
}

void __tsan_read_range_pc(void *addr, uptr size, void *pc) {
  MemoryAccessRange(cur_thread(), STRIP_PAC_PC(pc), (uptr)addr, size, false);
}

void __tsan_write_range_pc(void *addr, uptr size, void *pc) {
  MemoryAccessRange(cur_thread(), STRIP_PAC_PC(pc), (uptr)addr, size, true);
}
@


1.1.1.1
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
@@


1.1.1.1.2.1
log
@Sync with HEAD
@
text
@a36 4
void __tsan_read16(void *addr) {
  MemoryAccess16(cur_thread(), CALLERPC, (uptr)addr, kAccessRead);
}

a52 4
void __tsan_write16(void *addr) {
  MemoryAccess16(cur_thread(), CALLERPC, (uptr)addr, kAccessWrite);
}

@


1.1.1.2
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
@a36 4
void __tsan_read16(void *addr) {
  MemoryAccess16(cur_thread(), CALLERPC, (uptr)addr, kAccessRead);
}

a52 4
void __tsan_write16(void *addr) {
  MemoryAccess16(cur_thread(), CALLERPC, (uptr)addr, kAccessWrite);
}

@