head	1.4;
access;
symbols
	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
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1.2
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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_interface_java.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_interface_java.h"
#include "tsan_rtl.h"
#include "sanitizer_common/sanitizer_internal_defs.h"
#include "sanitizer_common/sanitizer_common.h"
#include "sanitizer_common/sanitizer_placement_new.h"
#include "sanitizer_common/sanitizer_stacktrace.h"
#include "sanitizer_common/sanitizer_procmaps.h"

using namespace __tsan;

const jptr kHeapAlignment = 8;

namespace __tsan {

struct JavaContext {
  const uptr heap_begin;
  const uptr heap_size;

  JavaContext(jptr heap_begin, jptr heap_size)
      : heap_begin(heap_begin)
      , heap_size(heap_size) {
  }
};

static u64 jctx_buf[sizeof(JavaContext) / sizeof(u64) + 1];
static JavaContext *jctx;

MBlock *JavaHeapBlock(uptr addr, uptr *start) {
  if (!jctx || addr < jctx->heap_begin ||
      addr >= jctx->heap_begin + jctx->heap_size)
    return nullptr;
  for (uptr p = RoundDown(addr, kMetaShadowCell); p >= jctx->heap_begin;
       p -= kMetaShadowCell) {
    MBlock *b = ctx->metamap.GetBlock(p);
    if (!b)
      continue;
    if (p + b->siz <= addr)
      return nullptr;
    *start = p;
    return b;
  }
  return nullptr;
}

}  // namespace __tsan

#define JAVA_FUNC_ENTER(func)      \
  ThreadState *thr = cur_thread(); \
  (void)thr;

void __tsan_java_init(jptr heap_begin, jptr heap_size) {
  JAVA_FUNC_ENTER(__tsan_java_init);
  Initialize(thr);
  DPrintf("#%d: java_init(0x%zx, 0x%zx)\n", thr->tid, heap_begin, heap_size);
  DCHECK_EQ(jctx, 0);
  DCHECK_GT(heap_begin, 0);
  DCHECK_GT(heap_size, 0);
  DCHECK_EQ(heap_begin % kHeapAlignment, 0);
  DCHECK_EQ(heap_size % kHeapAlignment, 0);
  DCHECK_LT(heap_begin, heap_begin + heap_size);
  jctx = new(jctx_buf) JavaContext(heap_begin, heap_size);
}

int  __tsan_java_fini() {
  JAVA_FUNC_ENTER(__tsan_java_fini);
  DPrintf("#%d: java_fini()\n", thr->tid);
  DCHECK_NE(jctx, 0);
  // FIXME(dvyukov): this does not call atexit() callbacks.
  int status = Finalize(thr);
  DPrintf("#%d: java_fini() = %d\n", thr->tid, status);
  return status;
}

void __tsan_java_alloc(jptr ptr, jptr size) {
  JAVA_FUNC_ENTER(__tsan_java_alloc);
  DPrintf("#%d: java_alloc(0x%zx, 0x%zx)\n", thr->tid, ptr, size);
  DCHECK_NE(jctx, 0);
  DCHECK_NE(size, 0);
  DCHECK_EQ(ptr % kHeapAlignment, 0);
  DCHECK_EQ(size % kHeapAlignment, 0);
  DCHECK_GE(ptr, jctx->heap_begin);
  DCHECK_LE(ptr + size, jctx->heap_begin + jctx->heap_size);

  OnUserAlloc(thr, 0, ptr, size, false);
}

void __tsan_java_free(jptr ptr, jptr size) {
  JAVA_FUNC_ENTER(__tsan_java_free);
  DPrintf("#%d: java_free(0x%zx, 0x%zx)\n", thr->tid, ptr, size);
  DCHECK_NE(jctx, 0);
  DCHECK_NE(size, 0);
  DCHECK_EQ(ptr % kHeapAlignment, 0);
  DCHECK_EQ(size % kHeapAlignment, 0);
  DCHECK_GE(ptr, jctx->heap_begin);
  DCHECK_LE(ptr + size, jctx->heap_begin + jctx->heap_size);

  ctx->metamap.FreeRange(thr->proc(), ptr, size, false);
}

void __tsan_java_move(jptr src, jptr dst, jptr size) {
  JAVA_FUNC_ENTER(__tsan_java_move);
  DPrintf("#%d: java_move(0x%zx, 0x%zx, 0x%zx)\n", thr->tid, src, dst, size);
  DCHECK_NE(jctx, 0);
  DCHECK_NE(size, 0);
  DCHECK_EQ(src % kHeapAlignment, 0);
  DCHECK_EQ(dst % kHeapAlignment, 0);
  DCHECK_EQ(size % kHeapAlignment, 0);
  DCHECK_GE(src, jctx->heap_begin);
  DCHECK_LE(src + size, jctx->heap_begin + jctx->heap_size);
  DCHECK_GE(dst, jctx->heap_begin);
  DCHECK_LE(dst + size, jctx->heap_begin + jctx->heap_size);
  DCHECK_NE(dst, src);
  DCHECK_NE(size, 0);

  // Assuming it's not running concurrently with threads that do
  // memory accesses and mutex operations (stop-the-world phase).
  ctx->metamap.MoveMemory(src, dst, size);

  // Clear the destination shadow range.
  // We used to move shadow from src to dst, but the trace format does not
  // support that anymore as it contains addresses of accesses.
  RawShadow *d = MemToShadow(dst);
  RawShadow *dend = MemToShadow(dst + size);
  ShadowSet(d, dend, Shadow::kEmpty);
}

jptr __tsan_java_find(jptr *from_ptr, jptr to) {
  JAVA_FUNC_ENTER(__tsan_java_find);
  DPrintf("#%d: java_find(&0x%zx, 0x%zx)\n", thr->tid, *from_ptr, to);
  DCHECK_EQ((*from_ptr) % kHeapAlignment, 0);
  DCHECK_EQ(to % kHeapAlignment, 0);
  DCHECK_GE(*from_ptr, jctx->heap_begin);
  DCHECK_LE(to, jctx->heap_begin + jctx->heap_size);
  for (uptr from = *from_ptr; from < to; from += kHeapAlignment) {
    MBlock *b = ctx->metamap.GetBlock(from);
    if (b) {
      *from_ptr = from;
      return b->siz;
    }
  }
  return 0;
}

void __tsan_java_finalize() {
  JAVA_FUNC_ENTER(__tsan_java_finalize);
  DPrintf("#%d: java_finalize()\n", thr->tid);
  AcquireGlobal(thr);
}

void __tsan_java_mutex_lock(jptr addr) {
  JAVA_FUNC_ENTER(__tsan_java_mutex_lock);
  DPrintf("#%d: java_mutex_lock(0x%zx)\n", thr->tid, addr);
  DCHECK_NE(jctx, 0);
  DCHECK_GE(addr, jctx->heap_begin);
  DCHECK_LT(addr, jctx->heap_begin + jctx->heap_size);

  MutexPostLock(thr, 0, addr,
                MutexFlagLinkerInit | MutexFlagWriteReentrant |
                    MutexFlagDoPreLockOnPostLock);
}

void __tsan_java_mutex_unlock(jptr addr) {
  JAVA_FUNC_ENTER(__tsan_java_mutex_unlock);
  DPrintf("#%d: java_mutex_unlock(0x%zx)\n", thr->tid, addr);
  DCHECK_NE(jctx, 0);
  DCHECK_GE(addr, jctx->heap_begin);
  DCHECK_LT(addr, jctx->heap_begin + jctx->heap_size);

  MutexUnlock(thr, 0, addr);
}

void __tsan_java_mutex_read_lock(jptr addr) {
  JAVA_FUNC_ENTER(__tsan_java_mutex_read_lock);
  DPrintf("#%d: java_mutex_read_lock(0x%zx)\n", thr->tid, addr);
  DCHECK_NE(jctx, 0);
  DCHECK_GE(addr, jctx->heap_begin);
  DCHECK_LT(addr, jctx->heap_begin + jctx->heap_size);

  MutexPostReadLock(thr, 0, addr,
                    MutexFlagLinkerInit | MutexFlagWriteReentrant |
                        MutexFlagDoPreLockOnPostLock);
}

void __tsan_java_mutex_read_unlock(jptr addr) {
  JAVA_FUNC_ENTER(__tsan_java_mutex_read_unlock);
  DPrintf("#%d: java_mutex_read_unlock(0x%zx)\n", thr->tid, addr);
  DCHECK_NE(jctx, 0);
  DCHECK_GE(addr, jctx->heap_begin);
  DCHECK_LT(addr, jctx->heap_begin + jctx->heap_size);

  MutexReadUnlock(thr, 0, addr);
}

void __tsan_java_mutex_lock_rec(jptr addr, int rec) {
  JAVA_FUNC_ENTER(__tsan_java_mutex_lock_rec);
  DPrintf("#%d: java_mutex_lock_rec(0x%zx, %d)\n", thr->tid, addr, rec);
  DCHECK_NE(jctx, 0);
  DCHECK_GE(addr, jctx->heap_begin);
  DCHECK_LT(addr, jctx->heap_begin + jctx->heap_size);
  DCHECK_GT(rec, 0);

  MutexPostLock(thr, 0, addr,
                MutexFlagLinkerInit | MutexFlagWriteReentrant |
                    MutexFlagDoPreLockOnPostLock | MutexFlagRecursiveLock,
                rec);
}

int __tsan_java_mutex_unlock_rec(jptr addr) {
  JAVA_FUNC_ENTER(__tsan_java_mutex_unlock_rec);
  DPrintf("#%d: java_mutex_unlock_rec(0x%zx)\n", thr->tid, addr);
  DCHECK_NE(jctx, 0);
  DCHECK_GE(addr, jctx->heap_begin);
  DCHECK_LT(addr, jctx->heap_begin + jctx->heap_size);

  return MutexUnlock(thr, 0, addr, MutexFlagRecursiveUnlock);
}

void __tsan_java_acquire(jptr addr) {
  JAVA_FUNC_ENTER(__tsan_java_acquire);
  DPrintf("#%d: java_acquire(0x%zx)\n", thr->tid, addr);
  DCHECK_NE(jctx, 0);
  DCHECK_GE(addr, jctx->heap_begin);
  DCHECK_LT(addr, jctx->heap_begin + jctx->heap_size);

  Acquire(thr, 0, addr);
}

void __tsan_java_release(jptr addr) {
  JAVA_FUNC_ENTER(__tsan_java_release);
  DPrintf("#%d: java_release(0x%zx)\n", thr->tid, addr);
  DCHECK_NE(jctx, 0);
  DCHECK_GE(addr, jctx->heap_begin);
  DCHECK_LT(addr, jctx->heap_begin + jctx->heap_size);

  Release(thr, 0, addr);
}

void __tsan_java_release_store(jptr addr) {
  JAVA_FUNC_ENTER(__tsan_java_release);
  DPrintf("#%d: java_release_store(0x%zx)\n", thr->tid, addr);
  DCHECK_NE(jctx, 0);
  DCHECK_GE(addr, jctx->heap_begin);
  DCHECK_LT(addr, jctx->heap_begin + jctx->heap_size);

  ReleaseStore(thr, 0, addr);
}
@


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
@d109 1
a109 1
  ctx->metamap.FreeRange(thr->proc(), ptr, size);
d136 1
a136 1
  internal_memset(d, 0, (dend - d) * sizeof(*d));
@


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
@a14 1
#include "tsan_mutex.h"
d37 2
a38 7
class ScopedJavaFunc {
 public:
  ScopedJavaFunc(ThreadState *thr, uptr pc)
      : thr_(thr) {
    Initialize(thr_);
    FuncEntry(thr, pc);
  }
d40 13
a52 3
  ~ScopedJavaFunc() {
    FuncExit(thr_);
    // FIXME(dvyukov): process pending signals.
d54 2
a55 7

 private:
  ThreadState *thr_;
};

static u64 jctx_buf[sizeof(JavaContext) / sizeof(u64) + 1];
static JavaContext *jctx;
d59 1
a59 1
#define SCOPED_JAVA_FUNC(func) \
d61 1
a61 5
  const uptr caller_pc = GET_CALLER_PC(); \
  const uptr pc = StackTrace::GetCurrentPc(); \
  (void)pc; \
  ScopedJavaFunc scoped(thr, caller_pc); \
/**/
d64 9
a72 8
  SCOPED_JAVA_FUNC(__tsan_java_init);
  DPrintf("#%d: java_init(%p, %p)\n", thr->tid, heap_begin, heap_size);
  CHECK_EQ(jctx, 0);
  CHECK_GT(heap_begin, 0);
  CHECK_GT(heap_size, 0);
  CHECK_EQ(heap_begin % kHeapAlignment, 0);
  CHECK_EQ(heap_size % kHeapAlignment, 0);
  CHECK_LT(heap_begin, heap_begin + heap_size);
d77 1
a77 1
  SCOPED_JAVA_FUNC(__tsan_java_fini);
d79 1
a79 1
  CHECK_NE(jctx, 0);
d87 8
a94 8
  SCOPED_JAVA_FUNC(__tsan_java_alloc);
  DPrintf("#%d: java_alloc(%p, %p)\n", thr->tid, ptr, size);
  CHECK_NE(jctx, 0);
  CHECK_NE(size, 0);
  CHECK_EQ(ptr % kHeapAlignment, 0);
  CHECK_EQ(size % kHeapAlignment, 0);
  CHECK_GE(ptr, jctx->heap_begin);
  CHECK_LE(ptr + size, jctx->heap_begin + jctx->heap_size);
d96 1
a96 1
  OnUserAlloc(thr, pc, ptr, size, false);
d100 8
a107 8
  SCOPED_JAVA_FUNC(__tsan_java_free);
  DPrintf("#%d: java_free(%p, %p)\n", thr->tid, ptr, size);
  CHECK_NE(jctx, 0);
  CHECK_NE(size, 0);
  CHECK_EQ(ptr % kHeapAlignment, 0);
  CHECK_EQ(size % kHeapAlignment, 0);
  CHECK_GE(ptr, jctx->heap_begin);
  CHECK_LE(ptr + size, jctx->heap_begin + jctx->heap_size);
d113 13
a125 13
  SCOPED_JAVA_FUNC(__tsan_java_move);
  DPrintf("#%d: java_move(%p, %p, %p)\n", thr->tid, src, dst, size);
  CHECK_NE(jctx, 0);
  CHECK_NE(size, 0);
  CHECK_EQ(src % kHeapAlignment, 0);
  CHECK_EQ(dst % kHeapAlignment, 0);
  CHECK_EQ(size % kHeapAlignment, 0);
  CHECK_GE(src, jctx->heap_begin);
  CHECK_LE(src + size, jctx->heap_begin + jctx->heap_size);
  CHECK_GE(dst, jctx->heap_begin);
  CHECK_LE(dst + size, jctx->heap_begin + jctx->heap_size);
  CHECK_NE(dst, src);
  CHECK_NE(size, 0);
d131 6
a136 15
  // Move shadow.
  u64 *s = (u64*)MemToShadow(src);
  u64 *d = (u64*)MemToShadow(dst);
  u64 *send = (u64*)MemToShadow(src + size);
  uptr inc = 1;
  if (dst > src) {
    s = (u64*)MemToShadow(src + size) - 1;
    d = (u64*)MemToShadow(dst + size) - 1;
    send = (u64*)MemToShadow(src) - 1;
    inc = -1;
  }
  for (; s != send; s += inc, d += inc) {
    *d = *s;
    *s = 0;
  }
d140 6
a145 6
  SCOPED_JAVA_FUNC(__tsan_java_find);
  DPrintf("#%d: java_find(&%p, %p)\n", *from_ptr, to);
  CHECK_EQ((*from_ptr) % kHeapAlignment, 0);
  CHECK_EQ(to % kHeapAlignment, 0);
  CHECK_GE(*from_ptr, jctx->heap_begin);
  CHECK_LE(to, jctx->heap_begin + jctx->heap_size);
d157 3
a159 3
  SCOPED_JAVA_FUNC(__tsan_java_finalize);
  DPrintf("#%d: java_mutex_finalize()\n", thr->tid);
  AcquireGlobal(thr, 0);
d163 9
a171 8
  SCOPED_JAVA_FUNC(__tsan_java_mutex_lock);
  DPrintf("#%d: java_mutex_lock(%p)\n", thr->tid, addr);
  CHECK_NE(jctx, 0);
  CHECK_GE(addr, jctx->heap_begin);
  CHECK_LT(addr, jctx->heap_begin + jctx->heap_size);

  MutexPostLock(thr, pc, addr, MutexFlagLinkerInit | MutexFlagWriteReentrant |
      MutexFlagDoPreLockOnPostLock);
d175 5
a179 5
  SCOPED_JAVA_FUNC(__tsan_java_mutex_unlock);
  DPrintf("#%d: java_mutex_unlock(%p)\n", thr->tid, addr);
  CHECK_NE(jctx, 0);
  CHECK_GE(addr, jctx->heap_begin);
  CHECK_LT(addr, jctx->heap_begin + jctx->heap_size);
d181 1
a181 1
  MutexUnlock(thr, pc, addr);
d185 9
a193 8
  SCOPED_JAVA_FUNC(__tsan_java_mutex_read_lock);
  DPrintf("#%d: java_mutex_read_lock(%p)\n", thr->tid, addr);
  CHECK_NE(jctx, 0);
  CHECK_GE(addr, jctx->heap_begin);
  CHECK_LT(addr, jctx->heap_begin + jctx->heap_size);

  MutexPostReadLock(thr, pc, addr, MutexFlagLinkerInit |
      MutexFlagWriteReentrant | MutexFlagDoPreLockOnPostLock);
d197 5
a201 5
  SCOPED_JAVA_FUNC(__tsan_java_mutex_read_unlock);
  DPrintf("#%d: java_mutex_read_unlock(%p)\n", thr->tid, addr);
  CHECK_NE(jctx, 0);
  CHECK_GE(addr, jctx->heap_begin);
  CHECK_LT(addr, jctx->heap_begin + jctx->heap_size);
d203 1
a203 1
  MutexReadUnlock(thr, pc, addr);
d207 11
a217 9
  SCOPED_JAVA_FUNC(__tsan_java_mutex_lock_rec);
  DPrintf("#%d: java_mutex_lock_rec(%p, %d)\n", thr->tid, addr, rec);
  CHECK_NE(jctx, 0);
  CHECK_GE(addr, jctx->heap_begin);
  CHECK_LT(addr, jctx->heap_begin + jctx->heap_size);
  CHECK_GT(rec, 0);

  MutexPostLock(thr, pc, addr, MutexFlagLinkerInit | MutexFlagWriteReentrant |
      MutexFlagDoPreLockOnPostLock | MutexFlagRecursiveLock, rec);
d221 5
a225 5
  SCOPED_JAVA_FUNC(__tsan_java_mutex_unlock_rec);
  DPrintf("#%d: java_mutex_unlock_rec(%p)\n", thr->tid, addr);
  CHECK_NE(jctx, 0);
  CHECK_GE(addr, jctx->heap_begin);
  CHECK_LT(addr, jctx->heap_begin + jctx->heap_size);
d227 1
a227 1
  return MutexUnlock(thr, pc, addr, MutexFlagRecursiveUnlock);
d231 5
a235 5
  SCOPED_JAVA_FUNC(__tsan_java_acquire);
  DPrintf("#%d: java_acquire(%p)\n", thr->tid, addr);
  CHECK_NE(jctx, 0);
  CHECK_GE(addr, jctx->heap_begin);
  CHECK_LT(addr, jctx->heap_begin + jctx->heap_size);
d237 1
a237 1
  Acquire(thr, caller_pc, addr);
d241 5
a245 5
  SCOPED_JAVA_FUNC(__tsan_java_release);
  DPrintf("#%d: java_release(%p)\n", thr->tid, addr);
  CHECK_NE(jctx, 0);
  CHECK_GE(addr, jctx->heap_begin);
  CHECK_LT(addr, jctx->heap_begin + jctx->heap_size);
d247 1
a247 1
  Release(thr, caller_pc, addr);
d251 5
a255 5
  SCOPED_JAVA_FUNC(__tsan_java_release);
  DPrintf("#%d: java_release_store(%p)\n", thr->tid, addr);
  CHECK_NE(jctx, 0);
  CHECK_GE(addr, jctx->heap_begin);
  CHECK_LT(addr, jctx->heap_begin + jctx->heap_size);
d257 1
a257 1
  ReleaseStore(thr, caller_pc, addr);
@


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
d38 17
a57 17
MBlock *JavaHeapBlock(uptr addr, uptr *start) {
  if (!jctx || addr < jctx->heap_begin ||
      addr >= jctx->heap_begin + jctx->heap_size)
    return nullptr;
  for (uptr p = RoundDown(addr, kMetaShadowCell); p >= jctx->heap_begin;
       p -= kMetaShadowCell) {
    MBlock *b = ctx->metamap.GetBlock(p);
    if (!b)
      continue;
    if (p + b->siz <= addr)
      return nullptr;
    *start = p;
    return b;
  }
  return nullptr;
}

d60 1
a60 1
#define JAVA_FUNC_ENTER(func)      \
d62 5
a66 1
  (void)thr;
d69 8
a76 9
  JAVA_FUNC_ENTER(__tsan_java_init);
  Initialize(thr);
  DPrintf("#%d: java_init(0x%zx, 0x%zx)\n", thr->tid, heap_begin, heap_size);
  DCHECK_EQ(jctx, 0);
  DCHECK_GT(heap_begin, 0);
  DCHECK_GT(heap_size, 0);
  DCHECK_EQ(heap_begin % kHeapAlignment, 0);
  DCHECK_EQ(heap_size % kHeapAlignment, 0);
  DCHECK_LT(heap_begin, heap_begin + heap_size);
d81 1
a81 1
  JAVA_FUNC_ENTER(__tsan_java_fini);
d83 1
a83 1
  DCHECK_NE(jctx, 0);
d91 8
a98 8
  JAVA_FUNC_ENTER(__tsan_java_alloc);
  DPrintf("#%d: java_alloc(0x%zx, 0x%zx)\n", thr->tid, ptr, size);
  DCHECK_NE(jctx, 0);
  DCHECK_NE(size, 0);
  DCHECK_EQ(ptr % kHeapAlignment, 0);
  DCHECK_EQ(size % kHeapAlignment, 0);
  DCHECK_GE(ptr, jctx->heap_begin);
  DCHECK_LE(ptr + size, jctx->heap_begin + jctx->heap_size);
d100 1
a100 1
  OnUserAlloc(thr, 0, ptr, size, false);
d104 8
a111 8
  JAVA_FUNC_ENTER(__tsan_java_free);
  DPrintf("#%d: java_free(0x%zx, 0x%zx)\n", thr->tid, ptr, size);
  DCHECK_NE(jctx, 0);
  DCHECK_NE(size, 0);
  DCHECK_EQ(ptr % kHeapAlignment, 0);
  DCHECK_EQ(size % kHeapAlignment, 0);
  DCHECK_GE(ptr, jctx->heap_begin);
  DCHECK_LE(ptr + size, jctx->heap_begin + jctx->heap_size);
d117 13
a129 13
  JAVA_FUNC_ENTER(__tsan_java_move);
  DPrintf("#%d: java_move(0x%zx, 0x%zx, 0x%zx)\n", thr->tid, src, dst, size);
  DCHECK_NE(jctx, 0);
  DCHECK_NE(size, 0);
  DCHECK_EQ(src % kHeapAlignment, 0);
  DCHECK_EQ(dst % kHeapAlignment, 0);
  DCHECK_EQ(size % kHeapAlignment, 0);
  DCHECK_GE(src, jctx->heap_begin);
  DCHECK_LE(src + size, jctx->heap_begin + jctx->heap_size);
  DCHECK_GE(dst, jctx->heap_begin);
  DCHECK_LE(dst + size, jctx->heap_begin + jctx->heap_size);
  DCHECK_NE(dst, src);
  DCHECK_NE(size, 0);
d135 15
a149 6
  // Clear the destination shadow range.
  // We used to move shadow from src to dst, but the trace format does not
  // support that anymore as it contains addresses of accesses.
  RawShadow *d = MemToShadow(dst);
  RawShadow *dend = MemToShadow(dst + size);
  internal_memset(d, 0, (dend - d) * sizeof(*d));
d153 6
a158 6
  JAVA_FUNC_ENTER(__tsan_java_find);
  DPrintf("#%d: java_find(&0x%zx, 0x%zx)\n", thr->tid, *from_ptr, to);
  DCHECK_EQ((*from_ptr) % kHeapAlignment, 0);
  DCHECK_EQ(to % kHeapAlignment, 0);
  DCHECK_GE(*from_ptr, jctx->heap_begin);
  DCHECK_LE(to, jctx->heap_begin + jctx->heap_size);
d170 3
a172 3
  JAVA_FUNC_ENTER(__tsan_java_finalize);
  DPrintf("#%d: java_finalize()\n", thr->tid);
  AcquireGlobal(thr);
d176 8
a183 9
  JAVA_FUNC_ENTER(__tsan_java_mutex_lock);
  DPrintf("#%d: java_mutex_lock(0x%zx)\n", thr->tid, addr);
  DCHECK_NE(jctx, 0);
  DCHECK_GE(addr, jctx->heap_begin);
  DCHECK_LT(addr, jctx->heap_begin + jctx->heap_size);

  MutexPostLock(thr, 0, addr,
                MutexFlagLinkerInit | MutexFlagWriteReentrant |
                    MutexFlagDoPreLockOnPostLock);
d187 5
a191 5
  JAVA_FUNC_ENTER(__tsan_java_mutex_unlock);
  DPrintf("#%d: java_mutex_unlock(0x%zx)\n", thr->tid, addr);
  DCHECK_NE(jctx, 0);
  DCHECK_GE(addr, jctx->heap_begin);
  DCHECK_LT(addr, jctx->heap_begin + jctx->heap_size);
d193 1
a193 1
  MutexUnlock(thr, 0, addr);
d197 8
a204 9
  JAVA_FUNC_ENTER(__tsan_java_mutex_read_lock);
  DPrintf("#%d: java_mutex_read_lock(0x%zx)\n", thr->tid, addr);
  DCHECK_NE(jctx, 0);
  DCHECK_GE(addr, jctx->heap_begin);
  DCHECK_LT(addr, jctx->heap_begin + jctx->heap_size);

  MutexPostReadLock(thr, 0, addr,
                    MutexFlagLinkerInit | MutexFlagWriteReentrant |
                        MutexFlagDoPreLockOnPostLock);
d208 5
a212 5
  JAVA_FUNC_ENTER(__tsan_java_mutex_read_unlock);
  DPrintf("#%d: java_mutex_read_unlock(0x%zx)\n", thr->tid, addr);
  DCHECK_NE(jctx, 0);
  DCHECK_GE(addr, jctx->heap_begin);
  DCHECK_LT(addr, jctx->heap_begin + jctx->heap_size);
d214 1
a214 1
  MutexReadUnlock(thr, 0, addr);
d218 9
a226 11
  JAVA_FUNC_ENTER(__tsan_java_mutex_lock_rec);
  DPrintf("#%d: java_mutex_lock_rec(0x%zx, %d)\n", thr->tid, addr, rec);
  DCHECK_NE(jctx, 0);
  DCHECK_GE(addr, jctx->heap_begin);
  DCHECK_LT(addr, jctx->heap_begin + jctx->heap_size);
  DCHECK_GT(rec, 0);

  MutexPostLock(thr, 0, addr,
                MutexFlagLinkerInit | MutexFlagWriteReentrant |
                    MutexFlagDoPreLockOnPostLock | MutexFlagRecursiveLock,
                rec);
d230 5
a234 5
  JAVA_FUNC_ENTER(__tsan_java_mutex_unlock_rec);
  DPrintf("#%d: java_mutex_unlock_rec(0x%zx)\n", thr->tid, addr);
  DCHECK_NE(jctx, 0);
  DCHECK_GE(addr, jctx->heap_begin);
  DCHECK_LT(addr, jctx->heap_begin + jctx->heap_size);
d236 1
a236 1
  return MutexUnlock(thr, 0, addr, MutexFlagRecursiveUnlock);
d240 5
a244 5
  JAVA_FUNC_ENTER(__tsan_java_acquire);
  DPrintf("#%d: java_acquire(0x%zx)\n", thr->tid, addr);
  DCHECK_NE(jctx, 0);
  DCHECK_GE(addr, jctx->heap_begin);
  DCHECK_LT(addr, jctx->heap_begin + jctx->heap_size);
d246 1
a246 1
  Acquire(thr, 0, addr);
d250 5
a254 5
  JAVA_FUNC_ENTER(__tsan_java_release);
  DPrintf("#%d: java_release(0x%zx)\n", thr->tid, addr);
  DCHECK_NE(jctx, 0);
  DCHECK_GE(addr, jctx->heap_begin);
  DCHECK_LT(addr, jctx->heap_begin + jctx->heap_size);
d256 1
a256 1
  Release(thr, 0, addr);
d260 5
a264 5
  JAVA_FUNC_ENTER(__tsan_java_release);
  DPrintf("#%d: java_release_store(0x%zx)\n", thr->tid, addr);
  DCHECK_NE(jctx, 0);
  DCHECK_GE(addr, jctx->heap_begin);
  DCHECK_LT(addr, jctx->heap_begin + jctx->heap_size);
d266 1
a266 1
  ReleaseStore(thr, 0, addr);
@


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
@d109 1
a109 1
  ctx->metamap.FreeRange(thr->proc(), ptr, size, false);
d136 1
a136 1
  ShadowSet(d, dend, Shadow::kEmpty);
@