head	1.4;
access;
symbols
	perseant-exfatfs-base-20261102:1.4
	netbsd-11-1-RELEASE:1.3
	gcc-14-4-0:1.1.1.3
	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	2025.09.14.00.08.54;	author mrg;	state Exp;
branches;
next	1.3;
commitid	x9D5QEnvbeMI4CaG;

1.3
date	2023.07.31.01.44.54;	author mrg;	state Exp;
branches
	1.3.2.1;
next	1.2;
commitid	q79F5Opf0FLsyTyE;

1.2
date	2021.04.11.23.54.25;	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;

1.3.2.1
date	2026.11.04.22.51.16;	author perseant;	state Exp;
branches;
next	;
commitid	3QTNojfCEH9lUb2H;

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	2023.07.30.05.20.41;	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
@//===-- asan_globals.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 AddressSanitizer, an address sanity checker.
//
// Handle globals.
//===----------------------------------------------------------------------===//

#include "asan_interceptors.h"
#include "asan_internal.h"
#include "asan_mapping.h"
#include "asan_poisoning.h"
#include "asan_report.h"
#include "asan_stack.h"
#include "asan_stats.h"
#include "asan_suppressions.h"
#include "asan_thread.h"
#include "sanitizer_common/sanitizer_common.h"
#include "sanitizer_common/sanitizer_mutex.h"
#include "sanitizer_common/sanitizer_placement_new.h"
#include "sanitizer_common/sanitizer_stackdepot.h"
#include "sanitizer_common/sanitizer_symbolizer.h"

namespace __asan {

typedef __asan_global Global;

struct ListOfGlobals {
  const Global *g;
  ListOfGlobals *next;
};

static Mutex mu_for_globals;
static ListOfGlobals *list_of_all_globals;

static const int kDynamicInitGlobalsInitialCapacity = 512;
struct DynInitGlobal {
  Global g;
  bool initialized;
};
typedef InternalMmapVector<DynInitGlobal> VectorOfGlobals;
// Lazy-initialized and never deleted.
static VectorOfGlobals *dynamic_init_globals;

// We want to remember where a certain range of globals was registered.
struct GlobalRegistrationSite {
  u32 stack_id;
  Global *g_first, *g_last;
};
typedef InternalMmapVector<GlobalRegistrationSite> GlobalRegistrationSiteVector;
static GlobalRegistrationSiteVector *global_registration_site_vector;

ALWAYS_INLINE void PoisonShadowForGlobal(const Global *g, u8 value) {
  FastPoisonShadow(g->beg, g->size_with_redzone, value);
}

ALWAYS_INLINE void PoisonRedZones(const Global &g) {
  uptr aligned_size = RoundUpTo(g.size, ASAN_SHADOW_GRANULARITY);
  FastPoisonShadow(g.beg + aligned_size, g.size_with_redzone - aligned_size,
                   kAsanGlobalRedzoneMagic);
  if (g.size != aligned_size) {
    FastPoisonShadowPartialRightRedzone(
        g.beg + RoundDownTo(g.size, ASAN_SHADOW_GRANULARITY),
        g.size % ASAN_SHADOW_GRANULARITY, ASAN_SHADOW_GRANULARITY,
        kAsanGlobalRedzoneMagic);
  }
}

const uptr kMinimalDistanceFromAnotherGlobal = 64;

static bool IsAddressNearGlobal(uptr addr, const __asan_global &g) {
  if (addr <= g.beg - kMinimalDistanceFromAnotherGlobal) return false;
  if (addr >= g.beg + g.size_with_redzone) return false;
  return true;
}

static void ReportGlobal(const Global &g, const char *prefix) {
  DataInfo info;
  bool symbolized = Symbolizer::GetOrInit()->SymbolizeData(g.beg, &info);
  Report(
      "%s Global[%p]: beg=%p size=%zu/%zu name=%s source=%s module=%s "
      "dyn_init=%zu "
      "odr_indicator=%p\n",
      prefix, (void *)&g, (void *)g.beg, g.size, g.size_with_redzone, g.name,
      g.module_name, (symbolized ? info.module : "?"), g.has_dynamic_init,
      (void *)g.odr_indicator);

  if (symbolized && info.line != 0) {
    Report("  location: name=%s, %d\n", info.file, static_cast<int>(info.line));
  } else if (g.gcc_location != 0) {
    // Fallback to Global::gcc_location
    Report("  location: name=%s, %d\n", g.gcc_location->filename, g.gcc_location->line_no);
  }
}

static u32 FindRegistrationSite(const Global *g) {
  mu_for_globals.CheckLocked();
  CHECK(global_registration_site_vector);
  for (uptr i = 0, n = global_registration_site_vector->size(); i < n; i++) {
    GlobalRegistrationSite &grs = (*global_registration_site_vector)[i];
    if (g >= grs.g_first && g <= grs.g_last)
      return grs.stack_id;
  }
  return 0;
}

int GetGlobalsForAddress(uptr addr, Global *globals, u32 *reg_sites,
                         int max_globals) {
  if (!flags()->report_globals) return 0;
  Lock lock(&mu_for_globals);
  int res = 0;
  for (ListOfGlobals *l = list_of_all_globals; l; l = l->next) {
    const Global &g = *l->g;
    if (flags()->report_globals >= 2)
      ReportGlobal(g, "Search");
    if (IsAddressNearGlobal(addr, g)) {
      internal_memcpy(&globals[res], &g, sizeof(g));
      if (reg_sites)
        reg_sites[res] = FindRegistrationSite(&g);
      res++;
      if (res == max_globals)
        break;
    }
  }
  return res;
}

enum GlobalSymbolState {
  UNREGISTERED = 0,
  REGISTERED = 1
};

// Check ODR violation for given global G via special ODR indicator. We use
// this method in case compiler instruments global variables through their
// local aliases.
static void CheckODRViolationViaIndicator(const Global *g) {
  // Instrumentation requests to skip ODR check.
  if (g->odr_indicator == UINTPTR_MAX)
    return;
  u8 *odr_indicator = reinterpret_cast<u8 *>(g->odr_indicator);
  if (*odr_indicator == UNREGISTERED) {
    *odr_indicator = REGISTERED;
    return;
  }
  // If *odr_indicator is DEFINED, some module have already registered
  // externally visible symbol with the same name. This is an ODR violation.
  for (ListOfGlobals *l = list_of_all_globals; l; l = l->next) {
    if (g->odr_indicator == l->g->odr_indicator &&
        (flags()->detect_odr_violation >= 2 || g->size != l->g->size) &&
        !IsODRViolationSuppressed(g->name))
      ReportODRViolation(g, FindRegistrationSite(g),
                         l->g, FindRegistrationSite(l->g));
  }
}

// Clang provides two different ways for global variables protection:
// it can poison the global itself or its private alias. In former
// case we may poison same symbol multiple times, that can help us to
// cheaply detect ODR violation: if we try to poison an already poisoned
// global, we have ODR violation error.
// In latter case, we poison each symbol exactly once, so we use special
// indicator symbol to perform similar check.
// In either case, compiler provides a special odr_indicator field to Global
// structure, that can contain two kinds of values:
//   1) Non-zero value. In this case, odr_indicator is an address of
//      corresponding indicator variable for given global.
//   2) Zero. This means that we don't use private aliases for global variables
//      and can freely check ODR violation with the first method.
//
// This routine chooses between two different methods of ODR violation
// detection.
static inline bool UseODRIndicator(const Global *g) {
  return g->odr_indicator > 0;
}

// Register a global variable.
// This function may be called more than once for every global
// so we store the globals in a map.
static void RegisterGlobal(const Global *g) {
  CHECK(AsanInited());
  if (flags()->report_globals >= 2)
    ReportGlobal(*g, "Added");
  CHECK(flags()->report_globals);
  CHECK(AddrIsInMem(g->beg));
  if (!AddrIsAlignedByGranularity(g->beg)) {
    Report("The following global variable is not properly aligned.\n");
    Report("This may happen if another global with the same name\n");
    Report("resides in another non-instrumented module.\n");
    Report("Or the global comes from a C file built w/o -fno-common.\n");
    Report("In either case this is likely an ODR violation bug,\n");
    Report("but AddressSanitizer can not provide more details.\n");
    ReportODRViolation(g, FindRegistrationSite(g), g, FindRegistrationSite(g));
    CHECK(AddrIsAlignedByGranularity(g->beg));
  }
  CHECK(AddrIsAlignedByGranularity(g->size_with_redzone));
  if (flags()->detect_odr_violation) {
    // Try detecting ODR (One Definition Rule) violation, i.e. the situation
    // where two globals with the same name are defined in different modules.
    if (UseODRIndicator(g))
      CheckODRViolationViaIndicator(g);
  }
  if (CanPoisonMemory())
    PoisonRedZones(*g);
  ListOfGlobals *l = new (GetGlobalLowLevelAllocator()) ListOfGlobals;
  l->g = g;
  l->next = list_of_all_globals;
  list_of_all_globals = l;
  if (g->has_dynamic_init) {
    if (!dynamic_init_globals) {
      dynamic_init_globals = new (GetGlobalLowLevelAllocator()) VectorOfGlobals;
      dynamic_init_globals->reserve(kDynamicInitGlobalsInitialCapacity);
    }
    DynInitGlobal dyn_global = { *g, false };
    dynamic_init_globals->push_back(dyn_global);
  }
}

static void UnregisterGlobal(const Global *g) {
  CHECK(AsanInited());
  if (flags()->report_globals >= 2)
    ReportGlobal(*g, "Removed");
  CHECK(flags()->report_globals);
  CHECK(AddrIsInMem(g->beg));
  CHECK(AddrIsAlignedByGranularity(g->beg));
  CHECK(AddrIsAlignedByGranularity(g->size_with_redzone));
  if (CanPoisonMemory())
    PoisonShadowForGlobal(g, 0);
  // We unpoison the shadow memory for the global but we do not remove it from
  // the list because that would require O(n^2) time with the current list
  // implementation. It might not be worth doing anyway.

  // Release ODR indicator.
  if (UseODRIndicator(g) && g->odr_indicator != UINTPTR_MAX) {
    u8 *odr_indicator = reinterpret_cast<u8 *>(g->odr_indicator);
    *odr_indicator = UNREGISTERED;
  }
}

void StopInitOrderChecking() {
  Lock lock(&mu_for_globals);
  if (!flags()->check_initialization_order || !dynamic_init_globals)
    return;
  flags()->check_initialization_order = false;
  for (uptr i = 0, n = dynamic_init_globals->size(); i < n; ++i) {
    DynInitGlobal &dyn_g = (*dynamic_init_globals)[i];
    const Global *g = &dyn_g.g;
    // Unpoison the whole global.
    PoisonShadowForGlobal(g, 0);
    // Poison redzones back.
    PoisonRedZones(*g);
  }
}

static bool IsASCII(unsigned char c) { return /*0x00 <= c &&*/ c <= 0x7F; }

const char *MaybeDemangleGlobalName(const char *name) {
  // We can spoil names of globals with C linkage, so use an heuristic
  // approach to check if the name should be demangled.
  bool should_demangle = false;
  if (name[0] == '_' && name[1] == 'Z')
    should_demangle = true;
  else if (SANITIZER_WINDOWS && name[0] == '\01' && name[1] == '?')
    should_demangle = true;

  return should_demangle ? Symbolizer::GetOrInit()->Demangle(name) : name;
}

// Check if the global is a zero-terminated ASCII string. If so, print it.
void PrintGlobalNameIfASCII(InternalScopedString *str, const __asan_global &g) {
  for (uptr p = g.beg; p < g.beg + g.size - 1; p++) {
    unsigned char c = *(unsigned char *)p;
    if (c == '\0' || !IsASCII(c)) return;
  }
  if (*(char *)(g.beg + g.size - 1) != '\0') return;
  str->AppendF("  '%s' is ascii string '%s'\n", MaybeDemangleGlobalName(g.name),
               (char *)g.beg);
}

void PrintGlobalLocation(InternalScopedString *str, const __asan_global &g,
                         bool print_module_name) {
  DataInfo info;
  if (Symbolizer::GetOrInit()->SymbolizeData(g.beg, &info) && info.line != 0) {
    str->AppendF("%s:%d", info.file, static_cast<int>(info.line));
  } else if (g.gcc_location != 0) {
    // Fallback to Global::gcc_location
    str->AppendF("%s", g.gcc_location->filename ? g.gcc_location->filename
                                                : g.module_name);
    if (g.gcc_location->line_no)
      str->AppendF(":%d", g.gcc_location->line_no);
    if (g.gcc_location->column_no)
      str->AppendF(":%d", g.gcc_location->column_no);
  } else {
    str->AppendF("%s", g.module_name);
  }
  if (print_module_name && info.module)
    str->AppendF(" in %s", info.module);
}

} // namespace __asan

// ---------------------- Interface ---------------- {{{1
using namespace __asan;

// Apply __asan_register_globals to all globals found in the same loaded
// executable or shared library as `flag'. The flag tracks whether globals have
// already been registered or not for this image.
void __asan_register_image_globals(uptr *flag) {
  if (*flag)
    return;
  AsanApplyToGlobals(__asan_register_globals, flag);
  *flag = 1;
}

// This mirrors __asan_register_image_globals.
void __asan_unregister_image_globals(uptr *flag) {
  if (!*flag)
    return;
  AsanApplyToGlobals(__asan_unregister_globals, flag);
  *flag = 0;
}

void __asan_register_elf_globals(uptr *flag, void *start, void *stop) {
  if (*flag) return;
  if (!start) return;
  CHECK_EQ(0, ((uptr)stop - (uptr)start) % sizeof(__asan_global));
  __asan_global *globals_start = (__asan_global*)start;
  __asan_global *globals_stop = (__asan_global*)stop;
  __asan_register_globals(globals_start, globals_stop - globals_start);
  *flag = 1;
}

void __asan_unregister_elf_globals(uptr *flag, void *start, void *stop) {
  if (!*flag) return;
  if (!start) return;
  CHECK_EQ(0, ((uptr)stop - (uptr)start) % sizeof(__asan_global));
  __asan_global *globals_start = (__asan_global*)start;
  __asan_global *globals_stop = (__asan_global*)stop;
  __asan_unregister_globals(globals_start, globals_stop - globals_start);
  *flag = 0;
}

// Register an array of globals.
void __asan_register_globals(__asan_global *globals, uptr n) {
  if (!flags()->report_globals) return;
  GET_STACK_TRACE_MALLOC;
  u32 stack_id = StackDepotPut(stack);
  Lock lock(&mu_for_globals);
  if (!global_registration_site_vector) {
    global_registration_site_vector =
        new (GetGlobalLowLevelAllocator()) GlobalRegistrationSiteVector;
    global_registration_site_vector->reserve(128);
  }
  GlobalRegistrationSite site = {stack_id, &globals[0], &globals[n - 1]};
  global_registration_site_vector->push_back(site);
  if (flags()->report_globals >= 2) {
    PRINT_CURRENT_STACK();
    Printf("=== ID %d; %p %p\n", stack_id, (void *)&globals[0],
           (void *)&globals[n - 1]);
  }
  for (uptr i = 0; i < n; i++) {
    if (SANITIZER_WINDOWS && globals[i].beg == 0) {
      // The MSVC incremental linker may pad globals out to 256 bytes. As long
      // as __asan_global is less than 256 bytes large and its size is a power
      // of two, we can skip over the padding.
      static_assert(
          sizeof(__asan_global) < 256 &&
              (sizeof(__asan_global) & (sizeof(__asan_global) - 1)) == 0,
          "sizeof(__asan_global) incompatible with incremental linker padding");
      // If these are padding bytes, the rest of the global should be zero.
      CHECK(globals[i].size == 0 && globals[i].size_with_redzone == 0 &&
            globals[i].name == nullptr && globals[i].module_name == nullptr &&
            globals[i].odr_indicator == 0);
      continue;
    }
    RegisterGlobal(&globals[i]);
  }

  // Poison the metadata. It should not be accessible to user code.
  PoisonShadow(reinterpret_cast<uptr>(globals), n * sizeof(__asan_global),
               kAsanGlobalRedzoneMagic);
}

// Unregister an array of globals.
// We must do this when a shared objects gets dlclosed.
void __asan_unregister_globals(__asan_global *globals, uptr n) {
  if (!flags()->report_globals) return;
  Lock lock(&mu_for_globals);
  for (uptr i = 0; i < n; i++) {
    if (SANITIZER_WINDOWS && globals[i].beg == 0) {
      // Skip globals that look like padding from the MSVC incremental linker.
      // See comment in __asan_register_globals.
      continue;
    }
    UnregisterGlobal(&globals[i]);
  }

  // Unpoison the metadata.
  PoisonShadow(reinterpret_cast<uptr>(globals), n * sizeof(__asan_global), 0);
}

// This method runs immediately prior to dynamic initialization in each TU,
// when all dynamically initialized globals are unpoisoned.  This method
// poisons all global variables not defined in this TU, so that a dynamic
// initializer can only touch global variables in the same TU.
void __asan_before_dynamic_init(const char *module_name) {
  if (!flags()->check_initialization_order ||
      !CanPoisonMemory() ||
      !dynamic_init_globals)
    return;
  bool strict_init_order = flags()->strict_init_order;
  CHECK(module_name);
  CHECK(AsanInited());
  Lock lock(&mu_for_globals);
  if (flags()->report_globals >= 3)
    Printf("DynInitPoison module: %s\n", module_name);
  for (uptr i = 0, n = dynamic_init_globals->size(); i < n; ++i) {
    DynInitGlobal &dyn_g = (*dynamic_init_globals)[i];
    const Global *g = &dyn_g.g;
    if (dyn_g.initialized)
      continue;
    if (g->module_name != module_name)
      PoisonShadowForGlobal(g, kAsanInitializationOrderMagic);
    else if (!strict_init_order)
      dyn_g.initialized = true;
  }
}

// This method runs immediately after dynamic initialization in each TU, when
// all dynamically initialized globals except for those defined in the current
// TU are poisoned.  It simply unpoisons all dynamically initialized globals.
void __asan_after_dynamic_init() {
  if (!flags()->check_initialization_order ||
      !CanPoisonMemory() ||
      !dynamic_init_globals)
    return;
  CHECK(AsanInited());
  Lock lock(&mu_for_globals);
  // FIXME: Optionally report that we're unpoisoning globals from a module.
  for (uptr i = 0, n = dynamic_init_globals->size(); i < n; ++i) {
    DynInitGlobal &dyn_g = (*dynamic_init_globals)[i];
    const Global *g = &dyn_g.g;
    if (!dyn_g.initialized) {
      // Unpoison the whole global.
      PoisonShadowForGlobal(g, 0);
      // Poison redzones back.
      PoisonRedZones(*g);
    }
  }
}
@


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
@a38 1
static LowLevelAllocator allocator_for_globals;
d63 1
a63 1
  uptr aligned_size = RoundUpTo(g.size, SHADOW_GRANULARITY);
d68 2
a69 3
        g.beg + RoundDownTo(g.size, SHADOW_GRANULARITY),
        g.size % SHADOW_GRANULARITY,
        SHADOW_GRANULARITY,
d83 2
d86 2
a87 1
      "%s Global[%p]: beg=%p size=%zu/%zu name=%s module=%s dyn_init=%zu "
d90 8
a97 5
      g.module_name, g.has_dynamic_init, (void *)g.odr_indicator);
  if (g.location) {
    Report("  location (%p): name=%s[%p], %d %d\n", (void *)g.location,
           g.location->filename, (void *)g.location->filename,
           g.location->line_no, g.location->column_no);
d185 1
a185 1
  CHECK(asan_inited);
d209 1
a209 1
  ListOfGlobals *l = new(allocator_for_globals) ListOfGlobals;
d215 1
a215 1
      dynamic_init_globals = new (allocator_for_globals) VectorOfGlobals;
d224 1
a224 1
  CHECK(asan_inited);
d280 2
a281 2
  str->append("  '%s' is ascii string '%s'\n", MaybeDemangleGlobalName(g.name),
              (char *)g.beg);
d284 18
a301 13
static const char *GlobalFilename(const __asan_global &g) {
  const char *res = g.module_name;
  // Prefer the filename from source location, if is available.
  if (g.location) res = g.location->filename;
  CHECK(res);
  return res;
}

void PrintGlobalLocation(InternalScopedString *str, const __asan_global &g) {
  str->append("%s", GlobalFilename(g));
  if (!g.location) return;
  if (g.location->line_no) str->append(":%d", g.location->line_no);
  if (g.location->column_no) str->append(":%d", g.location->column_no);
d355 1
a355 1
        new (allocator_for_globals) GlobalRegistrationSiteVector;
d417 1
a417 1
  CHECK(asan_inited);
d441 1
a441 1
  CHECK(asan_inited);
@


1.3.2.1
log
@Sync with HEAD
@
text
@d39 1
d64 1
a64 1
  uptr aligned_size = RoundUpTo(g.size, ASAN_SHADOW_GRANULARITY);
d69 3
a71 2
        g.beg + RoundDownTo(g.size, ASAN_SHADOW_GRANULARITY),
        g.size % ASAN_SHADOW_GRANULARITY, ASAN_SHADOW_GRANULARITY,
a84 2
  DataInfo info;
  bool symbolized = Symbolizer::GetOrInit()->SymbolizeData(g.beg, &info);
d86 1
a86 2
      "%s Global[%p]: beg=%p size=%zu/%zu name=%s source=%s module=%s "
      "dyn_init=%zu "
d89 5
a93 8
      g.module_name, (symbolized ? info.module : "?"), g.has_dynamic_init,
      (void *)g.odr_indicator);

  if (symbolized && info.line != 0) {
    Report("  location: name=%s, %d\n", info.file, static_cast<int>(info.line));
  } else if (g.gcc_location != 0) {
    // Fallback to Global::gcc_location
    Report("  location: name=%s, %d\n", g.gcc_location->filename, g.gcc_location->line_no);
d181 1
a181 1
  CHECK(AsanInited());
d205 1
a205 1
  ListOfGlobals *l = new (GetGlobalLowLevelAllocator()) ListOfGlobals;
d211 1
a211 1
      dynamic_init_globals = new (GetGlobalLowLevelAllocator()) VectorOfGlobals;
d220 1
a220 1
  CHECK(AsanInited());
d276 2
a277 2
  str->AppendF("  '%s' is ascii string '%s'\n", MaybeDemangleGlobalName(g.name),
               (char *)g.beg);
d280 13
a292 18
void PrintGlobalLocation(InternalScopedString *str, const __asan_global &g,
                         bool print_module_name) {
  DataInfo info;
  if (Symbolizer::GetOrInit()->SymbolizeData(g.beg, &info) && info.line != 0) {
    str->AppendF("%s:%d", info.file, static_cast<int>(info.line));
  } else if (g.gcc_location != 0) {
    // Fallback to Global::gcc_location
    str->AppendF("%s", g.gcc_location->filename ? g.gcc_location->filename
                                                : g.module_name);
    if (g.gcc_location->line_no)
      str->AppendF(":%d", g.gcc_location->line_no);
    if (g.gcc_location->column_no)
      str->AppendF(":%d", g.gcc_location->column_no);
  } else {
    str->AppendF("%s", g.module_name);
  }
  if (print_module_name && info.module)
    str->AppendF(" in %s", info.module);
d346 1
a346 1
        new (GetGlobalLowLevelAllocator()) GlobalRegistrationSiteVector;
d408 1
a408 1
  CHECK(AsanInited());
d432 1
a432 1
  CHECK(AsanInited());
@


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
@d38 1
a38 1
static BlockingMutex mu_for_globals(LINKER_INITIALIZED);
d88 1
a88 1
      prefix, &g, (void *)g.beg, g.size, g.size_with_redzone, g.name,
d91 3
a93 3
    Report("  location (%p): name=%s[%p], %d %d\n", g.location,
           g.location->filename, g.location->filename, g.location->line_no,
           g.location->column_no);
d111 1
a111 1
  BlockingMutexLock lock(&mu_for_globals);
d241 1
a241 1
  BlockingMutexLock lock(&mu_for_globals);
d343 1
a343 1
  BlockingMutexLock lock(&mu_for_globals);
d353 2
a354 1
    Printf("=== ID %d; %p %p\n", stack_id, &globals[0], &globals[n - 1]);
d383 1
a383 1
  BlockingMutexLock lock(&mu_for_globals);
d409 1
a409 1
  BlockingMutexLock lock(&mu_for_globals);
d433 1
a433 1
  BlockingMutexLock lock(&mu_for_globals);
@


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
@d38 1
a38 1
static Mutex mu_for_globals;
d88 1
a88 1
      prefix, (void *)&g, (void *)g.beg, g.size, g.size_with_redzone, g.name,
d91 3
a93 3
    Report("  location (%p): name=%s[%p], %d %d\n", (void *)g.location,
           g.location->filename, (void *)g.location->filename,
           g.location->line_no, g.location->column_no);
d111 1
a111 1
  Lock lock(&mu_for_globals);
d241 1
a241 1
  Lock lock(&mu_for_globals);
d343 1
a343 1
  Lock lock(&mu_for_globals);
d353 1
a353 2
    Printf("=== ID %d; %p %p\n", stack_id, (void *)&globals[0],
           (void *)&globals[n - 1]);
d382 1
a382 1
  Lock lock(&mu_for_globals);
d408 1
a408 1
  Lock lock(&mu_for_globals);
d432 1
a432 1
  Lock lock(&mu_for_globals);
@


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
@d39 1
d64 1
a64 1
  uptr aligned_size = RoundUpTo(g.size, ASAN_SHADOW_GRANULARITY);
d69 3
a71 2
        g.beg + RoundDownTo(g.size, ASAN_SHADOW_GRANULARITY),
        g.size % ASAN_SHADOW_GRANULARITY, ASAN_SHADOW_GRANULARITY,
a84 2
  DataInfo info;
  bool symbolized = Symbolizer::GetOrInit()->SymbolizeData(g.beg, &info);
d86 1
a86 2
      "%s Global[%p]: beg=%p size=%zu/%zu name=%s source=%s module=%s "
      "dyn_init=%zu "
d89 5
a93 8
      g.module_name, (symbolized ? info.module : "?"), g.has_dynamic_init,
      (void *)g.odr_indicator);

  if (symbolized && info.line != 0) {
    Report("  location: name=%s, %d\n", info.file, static_cast<int>(info.line));
  } else if (g.gcc_location != 0) {
    // Fallback to Global::gcc_location
    Report("  location: name=%s, %d\n", g.gcc_location->filename, g.gcc_location->line_no);
d181 1
a181 1
  CHECK(AsanInited());
d205 1
a205 1
  ListOfGlobals *l = new (GetGlobalLowLevelAllocator()) ListOfGlobals;
d211 1
a211 1
      dynamic_init_globals = new (GetGlobalLowLevelAllocator()) VectorOfGlobals;
d220 1
a220 1
  CHECK(AsanInited());
d276 2
a277 2
  str->AppendF("  '%s' is ascii string '%s'\n", MaybeDemangleGlobalName(g.name),
               (char *)g.beg);
d280 13
a292 18
void PrintGlobalLocation(InternalScopedString *str, const __asan_global &g,
                         bool print_module_name) {
  DataInfo info;
  if (Symbolizer::GetOrInit()->SymbolizeData(g.beg, &info) && info.line != 0) {
    str->AppendF("%s:%d", info.file, static_cast<int>(info.line));
  } else if (g.gcc_location != 0) {
    // Fallback to Global::gcc_location
    str->AppendF("%s", g.gcc_location->filename ? g.gcc_location->filename
                                                : g.module_name);
    if (g.gcc_location->line_no)
      str->AppendF(":%d", g.gcc_location->line_no);
    if (g.gcc_location->column_no)
      str->AppendF(":%d", g.gcc_location->column_no);
  } else {
    str->AppendF("%s", g.module_name);
  }
  if (print_module_name && info.module)
    str->AppendF(" in %s", info.module);
d346 1
a346 1
        new (GetGlobalLowLevelAllocator()) GlobalRegistrationSiteVector;
d408 1
a408 1
  CHECK(AsanInited());
d432 1
a432 1
  CHECK(AsanInited());
@