head	1.4;
access;
symbols
	netbsd-11-0-RELEASE:1.3
	netbsd-11-0-RC7:1.3
	netbsd-11-0-RC6:1.3
	netbsd-11-0-RC5:1.3
	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	2025.09.14.00.08.56;	author mrg;	state Exp;
branches;
next	1.3;
commitid	x9D5QEnvbeMI4CaG;

1.3
date	2023.07.31.01.44.56;	author mrg;	state Exp;
branches;
next	1.2;
commitid	q79F5Opf0FLsyTyE;

1.2
date	2021.04.11.23.54.27;	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	2023.07.30.05.20.40;	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
@//===-- sanitizer_flag_parser.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/AddressSanitizer runtime.
//
//===----------------------------------------------------------------------===//

#include "sanitizer_flag_parser.h"

#include "sanitizer_common.h"
#include "sanitizer_flag_parser.h"
#include "sanitizer_flags.h"
#include "sanitizer_libc.h"

namespace __sanitizer {

class UnknownFlags {
  static const int kMaxUnknownFlags = 20;
  const char *unknown_flags_[kMaxUnknownFlags];
  int n_unknown_flags_;

 public:
  void Add(const char *name) {
    CHECK_LT(n_unknown_flags_, kMaxUnknownFlags);
    unknown_flags_[n_unknown_flags_++] = name;
  }

  void Report() {
    if (!n_unknown_flags_) return;
    Printf("WARNING: found %d unrecognized flag(s):\n", n_unknown_flags_);
    for (int i = 0; i < n_unknown_flags_; ++i)
      Printf("    %s\n", unknown_flags_[i]);
    n_unknown_flags_ = 0;
  }
};

UnknownFlags unknown_flags;

void ReportUnrecognizedFlags() {
  unknown_flags.Report();
}

char *FlagParser::ll_strndup(const char *s, uptr n) {
  uptr len = internal_strnlen(s, n);
  char *s2 = (char *)GetGlobalLowLevelAllocator().Allocate(len + 1);
  internal_memcpy(s2, s, len);
  s2[len] = 0;
  return s2;
}

void FlagParser::PrintFlagDescriptions() {
  char buffer[128];
  buffer[sizeof(buffer) - 1] = '\0';
  Printf("Available flags for %s:\n", SanitizerToolName);
  for (int i = 0; i < n_flags_; ++i) {
    bool truncated = !(flags_[i].handler->Format(buffer, sizeof(buffer)));
    CHECK_EQ(buffer[sizeof(buffer) - 1], '\0');
    const char *truncation_str = truncated ? " Truncated" : "";
    Printf("\t%s\n\t\t- %s (Current Value%s: %s)\n", flags_[i].name,
           flags_[i].desc, truncation_str, buffer);
  }
}

void FlagParser::fatal_error(const char *err) {
  Printf("%s: ERROR: %s\n", SanitizerToolName, err);
  Die();
}

bool FlagParser::is_space(char c) {
  return c == ' ' || c == ',' || c == ':' || c == '\n' || c == '\t' ||
         c == '\r';
}

void FlagParser::skip_whitespace() {
  while (is_space(buf_[pos_])) ++pos_;
}

void FlagParser::parse_flag(const char *env_option_name) {
  uptr name_start = pos_;
  while (buf_[pos_] != 0 && buf_[pos_] != '=' && !is_space(buf_[pos_])) ++pos_;
  if (buf_[pos_] != '=') {
    if (env_option_name) {
      Printf("%s: ERROR: expected '=' in %s\n", SanitizerToolName,
             env_option_name);
      Die();
    } else {
      fatal_error("expected '='");
    }
  }
  char *name = ll_strndup(buf_ + name_start, pos_ - name_start);

  uptr value_start = ++pos_;
  char *value;
  if (buf_[pos_] == '\'' || buf_[pos_] == '"') {
    char quote = buf_[pos_++];
    while (buf_[pos_] != 0 && buf_[pos_] != quote) ++pos_;
    if (buf_[pos_] == 0) fatal_error("unterminated string");
    value = ll_strndup(buf_ + value_start + 1, pos_ - value_start - 1);
    ++pos_; // consume the closing quote
  } else {
    while (buf_[pos_] != 0 && !is_space(buf_[pos_])) ++pos_;
    if (buf_[pos_] != 0 && !is_space(buf_[pos_]))
      fatal_error("expected separator or eol");
    value = ll_strndup(buf_ + value_start, pos_ - value_start);
  }

  bool res = run_handler(name, value);
  if (!res) fatal_error("Flag parsing failed.");
}

void FlagParser::parse_flags(const char *env_option_name) {
  while (true) {
    skip_whitespace();
    if (buf_[pos_] == 0) break;
    parse_flag(env_option_name);
  }

  // Do a sanity check for certain flags.
  if (common_flags_dont_use.malloc_context_size < 1)
    common_flags_dont_use.malloc_context_size = 1;
}

void FlagParser::ParseStringFromEnv(const char *env_name) {
  const char *env = GetEnv(env_name);
  VPrintf(1, "%s: %s\n", env_name, env ? env : "<empty>");
  ParseString(env, env_name);
}

void FlagParser::ParseString(const char *s, const char *env_option_name) {
  if (!s) return;
  // Backup current parser state to allow nested ParseString() calls.
  const char *old_buf_ = buf_;
  uptr old_pos_ = pos_;
  buf_ = s;
  pos_ = 0;

  parse_flags(env_option_name);

  buf_ = old_buf_;
  pos_ = old_pos_;
}

bool FlagParser::ParseFile(const char *path, bool ignore_missing) {
  static const uptr kMaxIncludeSize = 1 << 15;
  char *data;
  uptr data_mapped_size;
  error_t err;
  uptr len;
  if (!ReadFileToBuffer(path, &data, &data_mapped_size, &len,
                        Max(kMaxIncludeSize, GetPageSizeCached()), &err)) {
    if (ignore_missing)
      return true;
    Printf("Failed to read options from '%s': error %d\n", path, err);
    return false;
  }
  ParseString(data, path);
  UnmapOrDie(data, data_mapped_size);
  return true;
}

bool FlagParser::run_handler(const char *name, const char *value) {
  for (int i = 0; i < n_flags_; ++i) {
    if (internal_strcmp(name, flags_[i].name) == 0)
      return flags_[i].handler->Parse(value);
  }
  // Unrecognized flag. This is not a fatal error, we may print a warning later.
  unknown_flags.Add(name);
  return true;
}

void FlagParser::RegisterHandler(const char *name, FlagHandlerBase *handler,
                                 const char *desc) {
  CHECK_LT(n_flags_, kMaxFlags);
  flags_[n_flags_].name = name;
  flags_[n_flags_].desc = desc;
  flags_[n_flags_].handler = handler;
  ++n_flags_;
}

FlagParser::FlagParser() : n_flags_(0), buf_(nullptr), pos_(0) {
  flags_ =
      (Flag *)GetGlobalLowLevelAllocator().Allocate(sizeof(Flag) * kMaxFlags);
}

}  // namespace __sanitizer
@


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
@d16 2
a18 2
#include "sanitizer_flags.h"
#include "sanitizer_flag_parser.h"
a21 2
LowLevelAllocator FlagParser::Alloc;

d50 1
a50 1
  char *s2 = (char*)Alloc.Allocate(len + 1);
d186 2
a187 1
  flags_ = (Flag *)Alloc.Allocate(sizeof(Flag) * kMaxFlags);
@


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
@d59 2
d62 7
a68 2
  for (int i = 0; i < n_flags_; ++i)
    Printf("\t%s\n\t\t- %s\n", flags_[i].name, flags_[i].desc);
@


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
@a58 2
  char buffer[128];
  buffer[sizeof(buffer) - 1] = '\0';
d60 2
a61 7
  for (int i = 0; i < n_flags_; ++i) {
    bool truncated = !(flags_[i].handler->Format(buffer, sizeof(buffer)));
    CHECK_EQ(buffer[sizeof(buffer) - 1], '\0');
    const char *truncation_str = truncated ? " Truncated" : "";
    Printf("\t%s\n\t\t- %s (Current Value%s: %s)\n", flags_[i].name,
           flags_[i].desc, truncation_str, buffer);
  }
@


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
@d16 2
a18 2
#include "sanitizer_flags.h"
#include "sanitizer_libc.h"
d22 2
d52 1
a52 1
  char *s2 = (char *)GetGlobalLowLevelAllocator().Allocate(len + 1);
d188 1
a188 2
  flags_ =
      (Flag *)GetGlobalLowLevelAllocator().Allocate(sizeof(Flag) * kMaxFlags);
@