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	2025.09.14.00.08.57;	author mrg;	state Exp;
branches;
next	1.3;
commitid	x9D5QEnvbeMI4CaG;

1.3
date	2023.07.31.01.44.56;	author mrg;	state Exp;
branches;
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commitid	q79F5Opf0FLsyTyE;

1.2
date	2021.04.11.23.54.27;	author mrg;	state dead;
branches;
next	1.1;
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1.1
date	2021.04.10.22.09.21;	author mrg;	state Exp;
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	1.1.1.1;
next	;
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1.1.1.1
date	2021.04.10.22.09.21;	author mrg;	state Exp;
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next	1.1.1.2;
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1.1.1.2
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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
@//===-- sanitizer_procmaps_common.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
//
//===----------------------------------------------------------------------===//
//
// Information about the process mappings (common parts).
//===----------------------------------------------------------------------===//

#include "sanitizer_platform.h"

#if SANITIZER_FREEBSD || SANITIZER_LINUX || SANITIZER_NETBSD ||                \
    SANITIZER_SOLARIS

#include "sanitizer_common.h"
#include "sanitizer_placement_new.h"
#include "sanitizer_procmaps.h"

namespace __sanitizer {

static ProcSelfMapsBuff cached_proc_self_maps;
static StaticSpinMutex cache_lock;

static int TranslateDigit(char c) {
  if (c >= '0' && c <= '9')
    return c - '0';
  if (c >= 'a' && c <= 'f')
    return c - 'a' + 10;
  if (c >= 'A' && c <= 'F')
    return c - 'A' + 10;
  return -1;
}

// Parse a number and promote 'p' up to the first non-digit character.
static uptr ParseNumber(const char **p, int base) {
  uptr n = 0;
  int d;
  CHECK(base >= 2 && base <= 16);
  while ((d = TranslateDigit(**p)) >= 0 && d < base) {
    n = n * base + d;
    (*p)++;
  }
  return n;
}

bool IsDecimal(char c) {
  int d = TranslateDigit(c);
  return d >= 0 && d < 10;
}

uptr ParseDecimal(const char **p) {
  return ParseNumber(p, 10);
}

bool IsHex(char c) {
  int d = TranslateDigit(c);
  return d >= 0 && d < 16;
}

uptr ParseHex(const char **p) {
  return ParseNumber(p, 16);
}

void MemoryMappedSegment::AddAddressRanges(LoadedModule *module) {
  // data_ should be unused on this platform
  CHECK(!data_);
  module->addAddressRange(start, end, IsExecutable(), IsWritable());
}

MemoryMappingLayout::MemoryMappingLayout(bool cache_enabled) {
  // FIXME: in the future we may want to cache the mappings on demand only.
  if (cache_enabled)
    CacheMemoryMappings();

  // Read maps after the cache update to capture the maps/unmaps happening in
  // the process of updating.
  ReadProcMaps(&data_.proc_self_maps);
  if (cache_enabled && data_.proc_self_maps.mmaped_size == 0)
    LoadFromCache();

  Reset();
}

bool MemoryMappingLayout::Error() const {
  return data_.current == nullptr;
}

MemoryMappingLayout::~MemoryMappingLayout() {
  // Only unmap the buffer if it is different from the cached one. Otherwise
  // it will be unmapped when the cache is refreshed.
  if (data_.proc_self_maps.data != cached_proc_self_maps.data)
    UnmapOrDie(data_.proc_self_maps.data, data_.proc_self_maps.mmaped_size);
}

void MemoryMappingLayout::Reset() {
  data_.current = data_.proc_self_maps.data;
}

// static
void MemoryMappingLayout::CacheMemoryMappings() {
  ProcSelfMapsBuff new_proc_self_maps;
  ReadProcMaps(&new_proc_self_maps);
  // Don't invalidate the cache if the mappings are unavailable.
  if (new_proc_self_maps.mmaped_size == 0)
    return;
  SpinMutexLock l(&cache_lock);
  if (cached_proc_self_maps.mmaped_size)
    UnmapOrDie(cached_proc_self_maps.data, cached_proc_self_maps.mmaped_size);
  cached_proc_self_maps = new_proc_self_maps;
}

void MemoryMappingLayout::LoadFromCache() {
  SpinMutexLock l(&cache_lock);
  if (cached_proc_self_maps.data)
    data_.proc_self_maps = cached_proc_self_maps;
}

void MemoryMappingLayout::DumpListOfModules(
    InternalMmapVectorNoCtor<LoadedModule> *modules) {
  Reset();
  InternalMmapVector<char> module_name(kMaxPathLength);
  MemoryMappedSegment segment(module_name.data(), module_name.size());
  for (uptr i = 0; Next(&segment); i++) {
    const char *cur_name = segment.filename;
    if (cur_name[0] == '\0')
      continue;
    // Don't subtract 'cur_beg' from the first entry:
    // * If a binary is compiled w/o -pie, then the first entry in
    //   process maps is likely the binary itself (all dynamic libs
    //   are mapped higher in address space). For such a binary,
    //   instruction offset in binary coincides with the actual
    //   instruction address in virtual memory (as code section
    //   is mapped to a fixed memory range).
    // * If a binary is compiled with -pie, all the modules are
    //   mapped high at address space (in particular, higher than
    //   shadow memory of the tool), so the module can't be the
    //   first entry.
    uptr base_address = (i ? segment.start : 0) - segment.offset;
    LoadedModule cur_module;
    cur_module.set(cur_name, base_address);
    segment.AddAddressRanges(&cur_module);
    modules->push_back(cur_module);
  }
}

#if SANITIZER_LINUX || SANITIZER_ANDROID || SANITIZER_SOLARIS || SANITIZER_NETBSD
void GetMemoryProfile(fill_profile_f cb, uptr *stats) {
  char *smaps = nullptr;
  uptr smaps_cap = 0;
  uptr smaps_len = 0;
  if (!ReadFileToBuffer("/proc/self/smaps", &smaps, &smaps_cap, &smaps_len))
    return;
  ParseUnixMemoryProfile(cb, stats, smaps, smaps_len);
  UnmapOrDie(smaps, smaps_cap);
}

void ParseUnixMemoryProfile(fill_profile_f cb, uptr *stats, char *smaps,
                            uptr smaps_len) {
  uptr start = 0;
  bool file = false;
  const char *pos = smaps;
  char *end = smaps + smaps_len;
  if (smaps_len < 2)
    return;
  // The following parsing can crash on almost every line
  // in the case of malformed/truncated input.
  // Fixing that is hard b/c e.g. ParseDecimal does not
  // even accept end of the buffer and assumes well-formed input.
  // So instead we patch end of the input a bit,
  // it does not affect well-formed complete inputs.
  *--end = 0;
  *--end = '\n';
  while (pos < end) {
    if (IsHex(pos[0])) {
      start = ParseHex(&pos);
      for (; *pos != '/' && *pos > '\n'; pos++) {}
      file = *pos == '/';
    } else if (internal_strncmp(pos, "Rss:", 4) == 0) {
      while (pos < end && !IsDecimal(*pos)) pos++;
      uptr rss = ParseDecimal(&pos) * 1024;
      cb(start, rss, file, stats);
    }
    while (*pos++ != '\n') {}
  }
}
#endif

} // namespace __sanitizer

#endif
@


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
@d148 1
d188 1
@


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
@d15 1
a15 1
    SANITIZER_OPENBSD || SANITIZER_SOLARIS
d123 1
a123 1
  InternalScopedString module_name(kMaxPathLength);
d148 1
a148 1
void GetMemoryProfile(fill_profile_f cb, uptr *stats, uptr stats_size) {
d154 6
d163 12
a174 1
  while (pos < smaps + smaps_len) {
d180 1
a180 1
      while (!IsDecimal(*pos)) pos++;
d182 1
a182 1
      cb(start, rss, file, stats, stats_size);
a185 1
  UnmapOrDie(smaps, smaps_cap);
@


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
@d15 1
a15 1
    SANITIZER_SOLARIS
d123 1
a123 1
  InternalMmapVector<char> module_name(kMaxPathLength);
d148 1
a148 1
void GetMemoryProfile(fill_profile_f cb, uptr *stats) {
a153 6
  ParseUnixMemoryProfile(cb, stats, smaps, smaps_len);
  UnmapOrDie(smaps, smaps_cap);
}

void ParseUnixMemoryProfile(fill_profile_f cb, uptr *stats, char *smaps,
                            uptr smaps_len) {
d157 1
a157 12
  char *end = smaps + smaps_len;
  if (smaps_len < 2)
    return;
  // The following parsing can crash on almost every line
  // in the case of malformed/truncated input.
  // Fixing that is hard b/c e.g. ParseDecimal does not
  // even accept end of the buffer and assumes well-formed input.
  // So instead we patch end of the input a bit,
  // it does not affect well-formed complete inputs.
  *--end = 0;
  *--end = '\n';
  while (pos < end) {
d163 1
a163 1
      while (pos < end && !IsDecimal(*pos)) pos++;
d165 1
a165 1
      cb(start, rss, file, stats);
d169 1
@


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
@a147 1
#if SANITIZER_LINUX || SANITIZER_ANDROID || SANITIZER_SOLARIS || SANITIZER_NETBSD
a186 1
#endif
@