head	1.3;
access;
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	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-14-3-0:1.1.1.2
	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
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	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	@// @;


1.3
date	2023.07.31.01.44.58;	author mrg;	state Exp;
branches;
next	1.2;
commitid	q79F5Opf0FLsyTyE;

1.2
date	2021.04.11.23.54.28;	author mrg;	state dead;
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commitid	wJn7ggfUTEMOWVOC;

1.1
date	2021.04.10.22.09.22;	author mrg;	state Exp;
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	1.1.1.1;
next	;
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1.1.1.1
date	2021.04.10.22.09.22;	author mrg;	state Exp;
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next	1.1.1.2;
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1.1.1.2
date	2023.07.30.05.20.41;	author mrg;	state Exp;
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next	;
commitid	tk6nV4mbc9nVEMyE;


desc
@@


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
@//===-- tsan_stack_trace.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 ThreadSanitizer (TSan), a race detector.
//
//===----------------------------------------------------------------------===//
#include "tsan_stack_trace.h"
#include "tsan_rtl.h"
#include "tsan_mman.h"

namespace __tsan {

VarSizeStackTrace::VarSizeStackTrace()
    : StackTrace(nullptr, 0), trace_buffer(nullptr) {}

VarSizeStackTrace::~VarSizeStackTrace() {
  ResizeBuffer(0);
}

void VarSizeStackTrace::ResizeBuffer(uptr new_size) {
  Free(trace_buffer);
  trace_buffer = (new_size > 0)
                     ? (uptr *)Alloc(new_size * sizeof(trace_buffer[0]))
                     : nullptr;
  trace = trace_buffer;
  size = new_size;
}

void VarSizeStackTrace::Init(const uptr *pcs, uptr cnt, uptr extra_top_pc) {
  ResizeBuffer(cnt + !!extra_top_pc);
  internal_memcpy(trace_buffer, pcs, cnt * sizeof(trace_buffer[0]));
  if (extra_top_pc)
    trace_buffer[cnt] = extra_top_pc;
}

void VarSizeStackTrace::ReverseOrder() {
  for (u32 i = 0; i < (size >> 1); i++)
    Swap(trace_buffer[i], trace_buffer[size - 1 - i]);
}

}  // namespace __tsan

#if !SANITIZER_GO
void __sanitizer::BufferedStackTrace::UnwindImpl(
    uptr pc, uptr bp, void *context, bool request_fast, u32 max_depth) {
  uptr top = 0;
  uptr bottom = 0;
  GetThreadStackTopAndBottom(false, &top, &bottom);
  bool fast = StackTrace::WillUseFastUnwind(request_fast);
  Unwind(max_depth, pc, bp, context, top, bottom, fast);
}
#endif  // SANITIZER_GO
@


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
@d26 4
a29 8
  if (trace_buffer) {
    internal_free(trace_buffer);
  }
  trace_buffer =
      (new_size > 0)
          ? (uptr *)internal_alloc(MBlockStackTrace,
                                   new_size * sizeof(trace_buffer[0]))
          : nullptr;
d53 3
a55 5
  if (StackTrace::WillUseFastUnwind(request_fast)) {
    GetThreadStackTopAndBottom(false, &top, &bottom);
    Unwind(max_depth, pc, bp, nullptr, top, bottom, true);
  } else
    Unwind(max_depth, pc, 0, context, 0, 0, false);
@


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
@d26 8
a33 4
  Free(trace_buffer);
  trace_buffer = (new_size > 0)
                     ? (uptr *)Alloc(new_size * sizeof(trace_buffer[0]))
                     : nullptr;
d57 5
a61 3
  GetThreadStackTopAndBottom(false, &top, &bottom);
  bool fast = StackTrace::WillUseFastUnwind(request_fast);
  Unwind(max_depth, pc, bp, context, top, bottom, fast);
@