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
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1.3
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1.2
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1.1
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1.1.1.2
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1.1.1.3
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desc
@@


1.4
log
@merge GCC 14.3.0.
@
text
@//===-- tsan_platform_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 ThreadSanitizer (TSan), a race detector.
//
// POSIX-specific code.
//===----------------------------------------------------------------------===//

#include "sanitizer_common/sanitizer_platform.h"
#if SANITIZER_POSIX

#  include <dlfcn.h>

#  include "sanitizer_common/sanitizer_common.h"
#  include "sanitizer_common/sanitizer_errno.h"
#  include "sanitizer_common/sanitizer_libc.h"
#  include "sanitizer_common/sanitizer_procmaps.h"
#  include "tsan_platform.h"
#  include "tsan_rtl.h"

namespace __tsan {

static const char kShadowMemoryMappingWarning[] =
    "FATAL: %s can not madvise shadow region [%zx, %zx] with %s (errno: %d)\n";
static const char kShadowMemoryMappingHint[] =
    "HINT: if %s is not supported in your environment, you may set "
    "TSAN_OPTIONS=%s=0\n";

#  if !SANITIZER_GO
void DontDumpShadow(uptr addr, uptr size) {
  if (common_flags()->use_madv_dontdump)
    if (!DontDumpShadowMemory(addr, size)) {
      Printf(kShadowMemoryMappingWarning, SanitizerToolName, addr, addr + size,
             "MADV_DONTDUMP", errno);
      Printf(kShadowMemoryMappingHint, "MADV_DONTDUMP", "use_madv_dontdump");
      Die();
    }
}

void InitializeShadowMemory() {
  // Map memory shadow.
  if (!MmapFixedSuperNoReserve(ShadowBeg(), ShadowEnd() - ShadowBeg(),
                               "shadow")) {
    Printf("FATAL: ThreadSanitizer can not mmap the shadow memory\n");
    Printf("FATAL: Make sure to compile with -fPIE and to link with -pie.\n");
    Die();
  }
  // This memory range is used for thread stacks and large user mmaps.
  // Frequently a thread uses only a small part of stack and similarly
  // a program uses a small part of large mmap. On some programs
  // we see 20% memory usage reduction without huge pages for this range.
  DontDumpShadow(ShadowBeg(), ShadowEnd() - ShadowBeg());
  DPrintf("memory shadow: %zx-%zx (%zuGB)\n",
      ShadowBeg(), ShadowEnd(),
      (ShadowEnd() - ShadowBeg()) >> 30);

  // Map meta shadow.
  const uptr meta = MetaShadowBeg();
  const uptr meta_size = MetaShadowEnd() - meta;
  if (!MmapFixedSuperNoReserve(meta, meta_size, "meta shadow")) {
    Printf("FATAL: ThreadSanitizer can not mmap the shadow memory\n");
    Printf("FATAL: Make sure to compile with -fPIE and to link with -pie.\n");
    Die();
  }
  DontDumpShadow(meta, meta_size);
  DPrintf("meta shadow: %zx-%zx (%zuGB)\n",
      meta, meta + meta_size, meta_size >> 30);

  InitializeShadowMemoryPlatform();

  on_initialize = reinterpret_cast<void (*)(void)>(
      dlsym(RTLD_DEFAULT, "__tsan_on_initialize"));
  on_finalize =
      reinterpret_cast<int (*)(int)>(dlsym(RTLD_DEFAULT, "__tsan_on_finalize"));
}

static bool TryProtectRange(uptr beg, uptr end) {
  CHECK_LE(beg, end);
  if (beg == end)
    return true;
  return beg == (uptr)MmapFixedNoAccess(beg, end - beg);
}

static void ProtectRange(uptr beg, uptr end) {
  if (!TryProtectRange(beg, end)) {
    Printf("FATAL: ThreadSanitizer can not protect [%zx,%zx]\n", beg, end);
    Printf("FATAL: Make sure you are not using unlimited stack\n");
    Die();
  }
}

void CheckAndProtect() {
  // Ensure that the binary is indeed compiled with -pie.
  MemoryMappingLayout proc_maps(true);
  MemoryMappedSegment segment;
  while (proc_maps.Next(&segment)) {
    if (IsAppMem(segment.start)) continue;
    if (segment.start >= HeapMemEnd() && segment.start < HeapEnd()) continue;
    if (segment.protection == 0)  // Zero page or mprotected.
      continue;
    if (segment.start >= VdsoBeg())  // vdso
      break;
    Printf("FATAL: ThreadSanitizer: unexpected memory mapping 0x%zx-0x%zx\n",
           segment.start, segment.end);
    Die();
  }

#    if SANITIZER_IOS && !SANITIZER_IOSSIM
  ProtectRange(HeapMemEnd(), ShadowBeg());
  ProtectRange(ShadowEnd(), MetaShadowBeg());
  ProtectRange(MetaShadowEnd(), HiAppMemBeg());
#    else
  ProtectRange(LoAppMemEnd(), ShadowBeg());
  ProtectRange(ShadowEnd(), MetaShadowBeg());
  if (MidAppMemBeg()) {
    ProtectRange(MetaShadowEnd(), MidAppMemBeg());
    ProtectRange(MidAppMemEnd(), HeapMemBeg());
  } else {
    ProtectRange(MetaShadowEnd(), HeapMemBeg());
  }
  ProtectRange(HeapEnd(), HiAppMemBeg());
#    endif

#    if defined(__s390x__)
  // Protect the rest of the address space.
  const uptr user_addr_max_l4 = 0x0020000000000000ull;
  const uptr user_addr_max_l5 = 0xfffffffffffff000ull;
  // All the maintained s390x kernels support at least 4-level page tables.
  ProtectRange(HiAppMemEnd(), user_addr_max_l4);
  // Older s390x kernels may not support 5-level page tables.
  TryProtectRange(user_addr_max_l4, user_addr_max_l5);
#endif
}
#endif

}  // namespace __tsan

#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
@d35 1
a35 1
static void DontDumpShadow(uptr addr, uptr size) {
d113 1
a113 1
#    if defined(__aarch64__) && defined(__APPLE__) && SANITIZER_IOS
d116 2
a117 2
  ProtectRange(MetaShadowEnd(), TraceMemBeg());
#else
d122 1
a122 1
    ProtectRange(MidAppMemEnd(), TraceMemBeg());
d124 1
a124 1
    ProtectRange(MetaShadowEnd(), TraceMemBeg());
a125 4
  // Memory for traces is mapped lazily in MapThreadTrace.
  // Protect the whole range for now, so that user does not map something here.
  ProtectRange(TraceMemBeg(), TraceMemEnd());
  ProtectRange(TraceMemEnd(), HeapMemBeg());
d127 1
a127 1
#endif
d129 1
a129 1
#if defined(__s390x__)
@


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
@d17 8
a24 6
#include "sanitizer_common/sanitizer_common.h"
#include "sanitizer_common/sanitizer_errno.h"
#include "sanitizer_common/sanitizer_libc.h"
#include "sanitizer_common/sanitizer_procmaps.h"
#include "tsan_platform.h"
#include "tsan_rtl.h"
d34 1
a34 4
static void NoHugePagesInShadow(uptr addr, uptr size) {
  SetShadowRegionHugePageMode(addr, size);
}

a44 1
#if !SANITIZER_GO
d47 2
a48 1
  if (!MmapFixedNoReserve(ShadowBeg(), ShadowEnd() - ShadowBeg(), "shadow")) {
a56 37
  // FIXME: don't use constants here.
#if defined(__x86_64__)
  const uptr kMadviseRangeBeg  = 0x7f0000000000ull;
  const uptr kMadviseRangeSize = 0x010000000000ull;
#elif defined(__mips64)
  const uptr kMadviseRangeBeg  = 0xff00000000ull;
  const uptr kMadviseRangeSize = 0x0100000000ull;
#elif defined(__aarch64__) && defined(__APPLE__)
  uptr kMadviseRangeBeg = LoAppMemBeg();
  uptr kMadviseRangeSize = LoAppMemEnd() - LoAppMemBeg();
#elif defined(__aarch64__)
  uptr kMadviseRangeBeg = 0;
  uptr kMadviseRangeSize = 0;
  if (vmaSize == 39) {
    kMadviseRangeBeg  = 0x7d00000000ull;
    kMadviseRangeSize = 0x0300000000ull;
  } else if (vmaSize == 42) {
    kMadviseRangeBeg  = 0x3f000000000ull;
    kMadviseRangeSize = 0x01000000000ull;
  } else {
    DCHECK(0);
  }
#elif defined(__powerpc64__)
  uptr kMadviseRangeBeg = 0;
  uptr kMadviseRangeSize = 0;
  if (vmaSize == 44) {
    kMadviseRangeBeg  = 0x0f60000000ull;
    kMadviseRangeSize = 0x0010000000ull;
  } else if (vmaSize == 46) {
    kMadviseRangeBeg  = 0x3f0000000000ull;
    kMadviseRangeSize = 0x010000000000ull;
  } else {
    DCHECK(0);
  }
#endif
  NoHugePagesInShadow(MemToShadow(kMadviseRangeBeg),
                      kMadviseRangeSize * kShadowMultiplier);
d65 1
a65 1
  if (!MmapFixedNoReserve(meta, meta_size, "meta shadow")) {
a69 1
  NoHugePagesInShadow(meta, meta_size);
d75 5
d82 1
a82 1
static void ProtectRange(uptr beg, uptr end) {
d85 6
a90 2
    return;
  if (beg != (uptr)MmapFixedNoAccess(beg, end - beg)) {
d108 1
a108 1
    Printf("FATAL: ThreadSanitizer: unexpected memory mapping %p-%p\n",
d113 1
a113 1
#if defined(__aarch64__) && defined(__APPLE__)
d120 6
a125 6
#ifdef TSAN_MID_APP_RANGE
  ProtectRange(MetaShadowEnd(), MidAppMemBeg());
  ProtectRange(MidAppMemEnd(), TraceMemBeg());
#else
  ProtectRange(MetaShadowEnd(), TraceMemBeg());
#endif
d132 10
@


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
@d17 6
a22 8
#  include <dlfcn.h>

#  include "sanitizer_common/sanitizer_common.h"
#  include "sanitizer_common/sanitizer_errno.h"
#  include "sanitizer_common/sanitizer_libc.h"
#  include "sanitizer_common/sanitizer_procmaps.h"
#  include "tsan_platform.h"
#  include "tsan_rtl.h"
d32 4
a35 1
#  if !SANITIZER_GO
d46 1
d49 1
a49 2
  if (!MmapFixedSuperNoReserve(ShadowBeg(), ShadowEnd() - ShadowBeg(),
                               "shadow")) {
d58 37
d103 1
a103 1
  if (!MmapFixedSuperNoReserve(meta, meta_size, "meta shadow")) {
d108 1
a113 5

  on_initialize = reinterpret_cast<void (*)(void)>(
      dlsym(RTLD_DEFAULT, "__tsan_on_initialize"));
  on_finalize =
      reinterpret_cast<int (*)(int)>(dlsym(RTLD_DEFAULT, "__tsan_on_finalize"));
d116 1
a116 1
static bool TryProtectRange(uptr beg, uptr end) {
d119 2
a120 6
    return true;
  return beg == (uptr)MmapFixedNoAccess(beg, end - beg);
}

static void ProtectRange(uptr beg, uptr end) {
  if (!TryProtectRange(beg, end)) {
d138 1
a138 1
    Printf("FATAL: ThreadSanitizer: unexpected memory mapping 0x%zx-0x%zx\n",
d143 1
a143 1
#    if defined(__aarch64__) && defined(__APPLE__) && SANITIZER_IOS
d150 6
a155 6
  if (MidAppMemBeg()) {
    ProtectRange(MetaShadowEnd(), MidAppMemBeg());
    ProtectRange(MidAppMemEnd(), TraceMemBeg());
  } else {
    ProtectRange(MetaShadowEnd(), TraceMemBeg());
  }
a161 10

#if defined(__s390x__)
  // Protect the rest of the address space.
  const uptr user_addr_max_l4 = 0x0020000000000000ull;
  const uptr user_addr_max_l5 = 0xfffffffffffff000ull;
  // All the maintained s390x kernels support at least 4-level page tables.
  ProtectRange(HiAppMemEnd(), user_addr_max_l4);
  // Older s390x kernels may not support 5-level page tables.
  TryProtectRange(user_addr_max_l4, user_addr_max_l5);
#endif
@


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
@d35 1
a35 1
void DontDumpShadow(uptr addr, uptr size) {
d113 1
a113 1
#    if SANITIZER_IOS && !SANITIZER_IOSSIM
d116 2
a117 2
  ProtectRange(MetaShadowEnd(), HiAppMemBeg());
#    else
d122 1
a122 1
    ProtectRange(MidAppMemEnd(), HeapMemBeg());
d124 1
a124 1
    ProtectRange(MetaShadowEnd(), HeapMemBeg());
d126 4
d131 1
a131 1
#    endif
d133 1
a133 1
#    if defined(__s390x__)
@