759 lines
23 KiB
C++
759 lines
23 KiB
C++
//===-- tsan_rtl.cpp ------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This file is a part of ThreadSanitizer (TSan), a race detector.
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//
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// Main file (entry points) for the TSan run-time.
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//===----------------------------------------------------------------------===//
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#include "tsan_rtl.h"
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#include "sanitizer_common/sanitizer_atomic.h"
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#include "sanitizer_common/sanitizer_common.h"
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#include "sanitizer_common/sanitizer_file.h"
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#include "sanitizer_common/sanitizer_libc.h"
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#include "sanitizer_common/sanitizer_placement_new.h"
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#include "sanitizer_common/sanitizer_stackdepot.h"
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#include "sanitizer_common/sanitizer_symbolizer.h"
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#include "tsan_defs.h"
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#include "tsan_interface.h"
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#include "tsan_mman.h"
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#include "tsan_platform.h"
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#include "tsan_suppressions.h"
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#include "tsan_symbolize.h"
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#include "ubsan/ubsan_init.h"
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volatile int __tsan_resumed = 0;
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extern "C" void __tsan_resume() {
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__tsan_resumed = 1;
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}
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namespace __tsan {
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#if !SANITIZER_GO
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void (*on_initialize)(void);
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int (*on_finalize)(int);
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#endif
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#if !SANITIZER_GO && !SANITIZER_MAC
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__attribute__((tls_model("initial-exec")))
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THREADLOCAL char cur_thread_placeholder[sizeof(ThreadState)] ALIGNED(
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SANITIZER_CACHE_LINE_SIZE);
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#endif
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static char ctx_placeholder[sizeof(Context)] ALIGNED(SANITIZER_CACHE_LINE_SIZE);
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Context *ctx;
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// Can be overriden by a front-end.
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#ifdef TSAN_EXTERNAL_HOOKS
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bool OnFinalize(bool failed);
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void OnInitialize();
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#else
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#include <dlfcn.h>
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SANITIZER_WEAK_CXX_DEFAULT_IMPL
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bool OnFinalize(bool failed) {
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#if !SANITIZER_GO
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if (on_finalize)
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return on_finalize(failed);
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#endif
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return failed;
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}
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SANITIZER_WEAK_CXX_DEFAULT_IMPL
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void OnInitialize() {
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#if !SANITIZER_GO
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if (on_initialize)
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on_initialize();
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#endif
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}
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#endif
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static ThreadContextBase *CreateThreadContext(Tid tid) {
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// Map thread trace when context is created.
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char name[50];
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internal_snprintf(name, sizeof(name), "trace %u", tid);
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MapThreadTrace(GetThreadTrace(tid), TraceSize() * sizeof(Event), name);
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const uptr hdr = GetThreadTraceHeader(tid);
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internal_snprintf(name, sizeof(name), "trace header %u", tid);
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MapThreadTrace(hdr, sizeof(Trace), name);
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new((void*)hdr) Trace();
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// We are going to use only a small part of the trace with the default
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// value of history_size. However, the constructor writes to the whole trace.
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// Release the unused part.
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uptr hdr_end = hdr + sizeof(Trace);
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hdr_end -= sizeof(TraceHeader) * (kTraceParts - TraceParts());
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hdr_end = RoundUp(hdr_end, GetPageSizeCached());
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if (hdr_end < hdr + sizeof(Trace)) {
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ReleaseMemoryPagesToOS(hdr_end, hdr + sizeof(Trace));
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uptr unused = hdr + sizeof(Trace) - hdr_end;
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if (hdr_end != (uptr)MmapFixedNoAccess(hdr_end, unused)) {
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Report("ThreadSanitizer: failed to mprotect [0x%zx-0x%zx) \n", hdr_end,
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unused);
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CHECK("unable to mprotect" && 0);
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}
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}
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return New<ThreadContext>(tid);
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}
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#if !SANITIZER_GO
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static const u32 kThreadQuarantineSize = 16;
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#else
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static const u32 kThreadQuarantineSize = 64;
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#endif
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Context::Context()
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: initialized(),
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report_mtx(MutexTypeReport),
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nreported(),
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thread_registry(CreateThreadContext, kMaxTid, kThreadQuarantineSize,
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kMaxTidReuse),
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racy_mtx(MutexTypeRacy),
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racy_stacks(),
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racy_addresses(),
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fired_suppressions_mtx(MutexTypeFired),
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clock_alloc(LINKER_INITIALIZED, "clock allocator") {
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fired_suppressions.reserve(8);
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}
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// The objects are allocated in TLS, so one may rely on zero-initialization.
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ThreadState::ThreadState(Context *ctx, Tid tid, int unique_id, u64 epoch,
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unsigned reuse_count, uptr stk_addr, uptr stk_size,
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uptr tls_addr, uptr tls_size)
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: fast_state(tid, epoch)
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// Do not touch these, rely on zero initialization,
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// they may be accessed before the ctor.
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// , ignore_reads_and_writes()
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// , ignore_interceptors()
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,
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clock(tid, reuse_count)
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#if !SANITIZER_GO
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,
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jmp_bufs()
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#endif
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,
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tid(tid),
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unique_id(unique_id),
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stk_addr(stk_addr),
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stk_size(stk_size),
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tls_addr(tls_addr),
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tls_size(tls_size)
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#if !SANITIZER_GO
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,
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last_sleep_clock(tid)
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#endif
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{
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CHECK_EQ(reinterpret_cast<uptr>(this) % SANITIZER_CACHE_LINE_SIZE, 0);
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#if !SANITIZER_GO
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shadow_stack_pos = shadow_stack;
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shadow_stack_end = shadow_stack + kShadowStackSize;
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#else
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// Setup dynamic shadow stack.
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const int kInitStackSize = 8;
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shadow_stack = (uptr *)Alloc(kInitStackSize * sizeof(uptr));
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shadow_stack_pos = shadow_stack;
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shadow_stack_end = shadow_stack + kInitStackSize;
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#endif
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}
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#if !SANITIZER_GO
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void MemoryProfiler(u64 uptime) {
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if (ctx->memprof_fd == kInvalidFd)
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return;
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InternalMmapVector<char> buf(4096);
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WriteMemoryProfile(buf.data(), buf.size(), uptime);
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WriteToFile(ctx->memprof_fd, buf.data(), internal_strlen(buf.data()));
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}
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void InitializeMemoryProfiler() {
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ctx->memprof_fd = kInvalidFd;
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const char *fname = flags()->profile_memory;
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if (!fname || !fname[0])
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return;
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if (internal_strcmp(fname, "stdout") == 0) {
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ctx->memprof_fd = 1;
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} else if (internal_strcmp(fname, "stderr") == 0) {
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ctx->memprof_fd = 2;
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} else {
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InternalScopedString filename;
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filename.append("%s.%d", fname, (int)internal_getpid());
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ctx->memprof_fd = OpenFile(filename.data(), WrOnly);
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if (ctx->memprof_fd == kInvalidFd) {
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Printf("ThreadSanitizer: failed to open memory profile file '%s'\n",
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filename.data());
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return;
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}
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}
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MemoryProfiler(0);
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MaybeSpawnBackgroundThread();
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}
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static void *BackgroundThread(void *arg) {
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// This is a non-initialized non-user thread, nothing to see here.
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// We don't use ScopedIgnoreInterceptors, because we want ignores to be
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// enabled even when the thread function exits (e.g. during pthread thread
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// shutdown code).
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cur_thread_init()->ignore_interceptors++;
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const u64 kMs2Ns = 1000 * 1000;
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const u64 start = NanoTime();
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u64 last_flush = NanoTime();
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uptr last_rss = 0;
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for (int i = 0;
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atomic_load(&ctx->stop_background_thread, memory_order_relaxed) == 0;
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i++) {
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SleepForMillis(100);
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u64 now = NanoTime();
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// Flush memory if requested.
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if (flags()->flush_memory_ms > 0) {
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if (last_flush + flags()->flush_memory_ms * kMs2Ns < now) {
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VPrintf(1, "ThreadSanitizer: periodic memory flush\n");
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FlushShadowMemory();
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last_flush = NanoTime();
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}
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}
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if (flags()->memory_limit_mb > 0) {
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uptr rss = GetRSS();
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uptr limit = uptr(flags()->memory_limit_mb) << 20;
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VPrintf(1, "ThreadSanitizer: memory flush check"
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" RSS=%llu LAST=%llu LIMIT=%llu\n",
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(u64)rss >> 20, (u64)last_rss >> 20, (u64)limit >> 20);
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if (2 * rss > limit + last_rss) {
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VPrintf(1, "ThreadSanitizer: flushing memory due to RSS\n");
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FlushShadowMemory();
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rss = GetRSS();
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VPrintf(1, "ThreadSanitizer: memory flushed RSS=%llu\n", (u64)rss>>20);
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}
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last_rss = rss;
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}
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MemoryProfiler(now - start);
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// Flush symbolizer cache if requested.
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if (flags()->flush_symbolizer_ms > 0) {
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u64 last = atomic_load(&ctx->last_symbolize_time_ns,
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memory_order_relaxed);
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if (last != 0 && last + flags()->flush_symbolizer_ms * kMs2Ns < now) {
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Lock l(&ctx->report_mtx);
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ScopedErrorReportLock l2;
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SymbolizeFlush();
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atomic_store(&ctx->last_symbolize_time_ns, 0, memory_order_relaxed);
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}
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}
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}
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return nullptr;
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}
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static void StartBackgroundThread() {
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ctx->background_thread = internal_start_thread(&BackgroundThread, 0);
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}
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#ifndef __mips__
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static void StopBackgroundThread() {
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atomic_store(&ctx->stop_background_thread, 1, memory_order_relaxed);
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internal_join_thread(ctx->background_thread);
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ctx->background_thread = 0;
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}
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#endif
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#endif
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void DontNeedShadowFor(uptr addr, uptr size) {
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ReleaseMemoryPagesToOS(reinterpret_cast<uptr>(MemToShadow(addr)),
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reinterpret_cast<uptr>(MemToShadow(addr + size)));
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}
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#if !SANITIZER_GO
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void UnmapShadow(ThreadState *thr, uptr addr, uptr size) {
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if (size == 0) return;
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DontNeedShadowFor(addr, size);
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ScopedGlobalProcessor sgp;
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ctx->metamap.ResetRange(thr->proc(), addr, size);
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}
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#endif
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void MapShadow(uptr addr, uptr size) {
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// Global data is not 64K aligned, but there are no adjacent mappings,
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// so we can get away with unaligned mapping.
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// CHECK_EQ(addr, addr & ~((64 << 10) - 1)); // windows wants 64K alignment
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const uptr kPageSize = GetPageSizeCached();
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uptr shadow_begin = RoundDownTo((uptr)MemToShadow(addr), kPageSize);
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uptr shadow_end = RoundUpTo((uptr)MemToShadow(addr + size), kPageSize);
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if (!MmapFixedSuperNoReserve(shadow_begin, shadow_end - shadow_begin,
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"shadow"))
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Die();
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// Meta shadow is 2:1, so tread carefully.
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static bool data_mapped = false;
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static uptr mapped_meta_end = 0;
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uptr meta_begin = (uptr)MemToMeta(addr);
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uptr meta_end = (uptr)MemToMeta(addr + size);
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meta_begin = RoundDownTo(meta_begin, 64 << 10);
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meta_end = RoundUpTo(meta_end, 64 << 10);
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if (!data_mapped) {
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// First call maps data+bss.
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data_mapped = true;
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if (!MmapFixedSuperNoReserve(meta_begin, meta_end - meta_begin,
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"meta shadow"))
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Die();
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} else {
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// Mapping continuous heap.
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// Windows wants 64K alignment.
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meta_begin = RoundDownTo(meta_begin, 64 << 10);
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meta_end = RoundUpTo(meta_end, 64 << 10);
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if (meta_end <= mapped_meta_end)
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return;
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if (meta_begin < mapped_meta_end)
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meta_begin = mapped_meta_end;
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if (!MmapFixedSuperNoReserve(meta_begin, meta_end - meta_begin,
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"meta shadow"))
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Die();
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mapped_meta_end = meta_end;
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}
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VPrintf(2, "mapped meta shadow for (0x%zx-0x%zx) at (0x%zx-0x%zx)\n", addr,
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addr + size, meta_begin, meta_end);
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}
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void MapThreadTrace(uptr addr, uptr size, const char *name) {
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DPrintf("#0: Mapping trace at 0x%zx-0x%zx(0x%zx)\n", addr, addr + size, size);
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CHECK_GE(addr, TraceMemBeg());
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CHECK_LE(addr + size, TraceMemEnd());
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CHECK_EQ(addr, addr & ~((64 << 10) - 1)); // windows wants 64K alignment
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if (!MmapFixedSuperNoReserve(addr, size, name)) {
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Printf("FATAL: ThreadSanitizer can not mmap thread trace (0x%zx/0x%zx)\n",
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addr, size);
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Die();
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}
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}
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#if !SANITIZER_GO
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static void OnStackUnwind(const SignalContext &sig, const void *,
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BufferedStackTrace *stack) {
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stack->Unwind(StackTrace::GetNextInstructionPc(sig.pc), sig.bp, sig.context,
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common_flags()->fast_unwind_on_fatal);
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}
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static void TsanOnDeadlySignal(int signo, void *siginfo, void *context) {
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HandleDeadlySignal(siginfo, context, GetTid(), &OnStackUnwind, nullptr);
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}
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#endif
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void CheckUnwind() {
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// There is high probability that interceptors will check-fail as well,
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// on the other hand there is no sense in processing interceptors
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// since we are going to die soon.
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ScopedIgnoreInterceptors ignore;
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#if !SANITIZER_GO
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cur_thread()->ignore_sync++;
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cur_thread()->ignore_reads_and_writes++;
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#endif
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PrintCurrentStackSlow(StackTrace::GetCurrentPc());
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}
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bool is_initialized;
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void Initialize(ThreadState *thr) {
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// Thread safe because done before all threads exist.
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if (is_initialized)
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return;
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is_initialized = true;
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// We are not ready to handle interceptors yet.
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ScopedIgnoreInterceptors ignore;
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SanitizerToolName = "ThreadSanitizer";
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// Install tool-specific callbacks in sanitizer_common.
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SetCheckUnwindCallback(CheckUnwind);
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ctx = new(ctx_placeholder) Context;
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const char *env_name = SANITIZER_GO ? "GORACE" : "TSAN_OPTIONS";
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const char *options = GetEnv(env_name);
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CacheBinaryName();
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CheckASLR();
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InitializeFlags(&ctx->flags, options, env_name);
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AvoidCVE_2016_2143();
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__sanitizer::InitializePlatformEarly();
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__tsan::InitializePlatformEarly();
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#if !SANITIZER_GO
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// Re-exec ourselves if we need to set additional env or command line args.
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MaybeReexec();
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InitializeAllocator();
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ReplaceSystemMalloc();
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#endif
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if (common_flags()->detect_deadlocks)
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ctx->dd = DDetector::Create(flags());
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Processor *proc = ProcCreate();
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ProcWire(proc, thr);
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InitializeInterceptors();
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InitializePlatform();
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InitializeDynamicAnnotations();
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#if !SANITIZER_GO
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InitializeShadowMemory();
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InitializeAllocatorLate();
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InstallDeadlySignalHandlers(TsanOnDeadlySignal);
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#endif
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// Setup correct file descriptor for error reports.
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__sanitizer_set_report_path(common_flags()->log_path);
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InitializeSuppressions();
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#if !SANITIZER_GO
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InitializeLibIgnore();
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Symbolizer::GetOrInit()->AddHooks(EnterSymbolizer, ExitSymbolizer);
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#endif
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VPrintf(1, "***** Running under ThreadSanitizer v2 (pid %d) *****\n",
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(int)internal_getpid());
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// Initialize thread 0.
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Tid tid = ThreadCreate(thr, 0, 0, true);
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CHECK_EQ(tid, kMainTid);
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ThreadStart(thr, tid, GetTid(), ThreadType::Regular);
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#if TSAN_CONTAINS_UBSAN
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__ubsan::InitAsPlugin();
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#endif
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ctx->initialized = true;
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#if !SANITIZER_GO
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Symbolizer::LateInitialize();
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InitializeMemoryProfiler();
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#endif
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if (flags()->stop_on_start) {
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Printf("ThreadSanitizer is suspended at startup (pid %d)."
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" Call __tsan_resume().\n",
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(int)internal_getpid());
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while (__tsan_resumed == 0) {}
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}
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OnInitialize();
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}
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void MaybeSpawnBackgroundThread() {
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// On MIPS, TSan initialization is run before
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// __pthread_initialize_minimal_internal() is finished, so we can not spawn
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// new threads.
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#if !SANITIZER_GO && !defined(__mips__)
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static atomic_uint32_t bg_thread = {};
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if (atomic_load(&bg_thread, memory_order_relaxed) == 0 &&
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atomic_exchange(&bg_thread, 1, memory_order_relaxed) == 0) {
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StartBackgroundThread();
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SetSandboxingCallback(StopBackgroundThread);
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}
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#endif
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}
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int Finalize(ThreadState *thr) {
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bool failed = false;
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if (common_flags()->print_module_map == 1)
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DumpProcessMap();
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if (flags()->atexit_sleep_ms > 0 && ThreadCount(thr) > 1)
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SleepForMillis(flags()->atexit_sleep_ms);
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// Wait for pending reports.
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ctx->report_mtx.Lock();
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{ ScopedErrorReportLock l; }
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ctx->report_mtx.Unlock();
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#if !SANITIZER_GO
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if (Verbosity()) AllocatorPrintStats();
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#endif
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ThreadFinalize(thr);
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if (ctx->nreported) {
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failed = true;
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#if !SANITIZER_GO
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Printf("ThreadSanitizer: reported %d warnings\n", ctx->nreported);
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#else
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Printf("Found %d data race(s)\n", ctx->nreported);
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#endif
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}
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if (common_flags()->print_suppressions)
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PrintMatchedSuppressions();
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failed = OnFinalize(failed);
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return failed ? common_flags()->exitcode : 0;
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}
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#if !SANITIZER_GO
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void ForkBefore(ThreadState *thr, uptr pc) NO_THREAD_SAFETY_ANALYSIS {
|
|
ctx->thread_registry.Lock();
|
|
ctx->report_mtx.Lock();
|
|
ScopedErrorReportLock::Lock();
|
|
// Suppress all reports in the pthread_atfork callbacks.
|
|
// Reports will deadlock on the report_mtx.
|
|
// We could ignore sync operations as well,
|
|
// but so far it's unclear if it will do more good or harm.
|
|
// Unnecessarily ignoring things can lead to false positives later.
|
|
thr->suppress_reports++;
|
|
// On OS X, REAL(fork) can call intercepted functions (OSSpinLockLock), and
|
|
// we'll assert in CheckNoLocks() unless we ignore interceptors.
|
|
thr->ignore_interceptors++;
|
|
}
|
|
|
|
void ForkParentAfter(ThreadState *thr, uptr pc) NO_THREAD_SAFETY_ANALYSIS {
|
|
thr->suppress_reports--; // Enabled in ForkBefore.
|
|
thr->ignore_interceptors--;
|
|
ScopedErrorReportLock::Unlock();
|
|
ctx->report_mtx.Unlock();
|
|
ctx->thread_registry.Unlock();
|
|
}
|
|
|
|
void ForkChildAfter(ThreadState *thr, uptr pc,
|
|
bool start_thread) NO_THREAD_SAFETY_ANALYSIS {
|
|
thr->suppress_reports--; // Enabled in ForkBefore.
|
|
thr->ignore_interceptors--;
|
|
ScopedErrorReportLock::Unlock();
|
|
ctx->report_mtx.Unlock();
|
|
ctx->thread_registry.Unlock();
|
|
|
|
uptr nthread = 0;
|
|
ctx->thread_registry.GetNumberOfThreads(0, 0, &nthread /* alive threads */);
|
|
VPrintf(1, "ThreadSanitizer: forked new process with pid %d,"
|
|
" parent had %d threads\n", (int)internal_getpid(), (int)nthread);
|
|
if (nthread == 1) {
|
|
if (start_thread)
|
|
StartBackgroundThread();
|
|
} else {
|
|
// We've just forked a multi-threaded process. We cannot reasonably function
|
|
// after that (some mutexes may be locked before fork). So just enable
|
|
// ignores for everything in the hope that we will exec soon.
|
|
ctx->after_multithreaded_fork = true;
|
|
thr->ignore_interceptors++;
|
|
ThreadIgnoreBegin(thr, pc);
|
|
ThreadIgnoreSyncBegin(thr, pc);
|
|
}
|
|
}
|
|
#endif
|
|
|
|
#if SANITIZER_GO
|
|
NOINLINE
|
|
void GrowShadowStack(ThreadState *thr) {
|
|
const int sz = thr->shadow_stack_end - thr->shadow_stack;
|
|
const int newsz = 2 * sz;
|
|
auto *newstack = (uptr *)Alloc(newsz * sizeof(uptr));
|
|
internal_memcpy(newstack, thr->shadow_stack, sz * sizeof(uptr));
|
|
Free(thr->shadow_stack);
|
|
thr->shadow_stack = newstack;
|
|
thr->shadow_stack_pos = newstack + sz;
|
|
thr->shadow_stack_end = newstack + newsz;
|
|
}
|
|
#endif
|
|
|
|
StackID CurrentStackId(ThreadState *thr, uptr pc) {
|
|
if (!thr->is_inited) // May happen during bootstrap.
|
|
return kInvalidStackID;
|
|
if (pc != 0) {
|
|
#if !SANITIZER_GO
|
|
DCHECK_LT(thr->shadow_stack_pos, thr->shadow_stack_end);
|
|
#else
|
|
if (thr->shadow_stack_pos == thr->shadow_stack_end)
|
|
GrowShadowStack(thr);
|
|
#endif
|
|
thr->shadow_stack_pos[0] = pc;
|
|
thr->shadow_stack_pos++;
|
|
}
|
|
StackID id = StackDepotPut(
|
|
StackTrace(thr->shadow_stack, thr->shadow_stack_pos - thr->shadow_stack));
|
|
if (pc != 0)
|
|
thr->shadow_stack_pos--;
|
|
return id;
|
|
}
|
|
|
|
namespace v3 {
|
|
|
|
NOINLINE
|
|
void TraceSwitchPart(ThreadState *thr) {
|
|
Trace *trace = &thr->tctx->trace;
|
|
Event *pos = reinterpret_cast<Event *>(atomic_load_relaxed(&thr->trace_pos));
|
|
DCHECK_EQ(reinterpret_cast<uptr>(pos + 1) & TracePart::kAlignment, 0);
|
|
auto *part = trace->parts.Back();
|
|
DPrintf("TraceSwitchPart part=%p pos=%p\n", part, pos);
|
|
if (part) {
|
|
// We can get here when we still have space in the current trace part.
|
|
// The fast-path check in TraceAcquire has false positives in the middle of
|
|
// the part. Check if we are indeed at the end of the current part or not,
|
|
// and fill any gaps with NopEvent's.
|
|
Event *end = &part->events[TracePart::kSize];
|
|
DCHECK_GE(pos, &part->events[0]);
|
|
DCHECK_LE(pos, end);
|
|
if (pos + 1 < end) {
|
|
if ((reinterpret_cast<uptr>(pos) & TracePart::kAlignment) ==
|
|
TracePart::kAlignment)
|
|
*pos++ = NopEvent;
|
|
*pos++ = NopEvent;
|
|
DCHECK_LE(pos + 2, end);
|
|
atomic_store_relaxed(&thr->trace_pos, reinterpret_cast<uptr>(pos));
|
|
// Ensure we setup trace so that the next TraceAcquire
|
|
// won't detect trace part end.
|
|
Event *ev;
|
|
CHECK(TraceAcquire(thr, &ev));
|
|
return;
|
|
}
|
|
// We are indeed at the end.
|
|
for (; pos < end; pos++) *pos = NopEvent;
|
|
}
|
|
#if !SANITIZER_GO
|
|
if (ctx->after_multithreaded_fork) {
|
|
// We just need to survive till exec.
|
|
CHECK(part);
|
|
atomic_store_relaxed(&thr->trace_pos,
|
|
reinterpret_cast<uptr>(&part->events[0]));
|
|
return;
|
|
}
|
|
#endif
|
|
part = new (MmapOrDie(sizeof(TracePart), "TracePart")) TracePart();
|
|
part->trace = trace;
|
|
thr->trace_prev_pc = 0;
|
|
{
|
|
Lock lock(&trace->mtx);
|
|
trace->parts.PushBack(part);
|
|
atomic_store_relaxed(&thr->trace_pos,
|
|
reinterpret_cast<uptr>(&part->events[0]));
|
|
}
|
|
// Make this part self-sufficient by restoring the current stack
|
|
// and mutex set in the beginning of the trace.
|
|
TraceTime(thr);
|
|
for (uptr *pos = &thr->shadow_stack[0]; pos < thr->shadow_stack_pos; pos++)
|
|
CHECK(TryTraceFunc(thr, *pos));
|
|
for (uptr i = 0; i < thr->mset.Size(); i++) {
|
|
MutexSet::Desc d = thr->mset.Get(i);
|
|
TraceMutexLock(thr, d.write ? EventType::kLock : EventType::kRLock, 0,
|
|
d.addr, d.stack_id);
|
|
}
|
|
}
|
|
|
|
} // namespace v3
|
|
|
|
void TraceSwitch(ThreadState *thr) {
|
|
#if !SANITIZER_GO
|
|
if (ctx->after_multithreaded_fork)
|
|
return;
|
|
#endif
|
|
thr->nomalloc++;
|
|
Trace *thr_trace = ThreadTrace(thr->tid);
|
|
Lock l(&thr_trace->mtx);
|
|
unsigned trace = (thr->fast_state.epoch() / kTracePartSize) % TraceParts();
|
|
TraceHeader *hdr = &thr_trace->headers[trace];
|
|
hdr->epoch0 = thr->fast_state.epoch();
|
|
ObtainCurrentStack(thr, 0, &hdr->stack0);
|
|
hdr->mset0 = thr->mset;
|
|
thr->nomalloc--;
|
|
}
|
|
|
|
Trace *ThreadTrace(Tid tid) { return (Trace *)GetThreadTraceHeader(tid); }
|
|
|
|
uptr TraceTopPC(ThreadState *thr) {
|
|
Event *events = (Event*)GetThreadTrace(thr->tid);
|
|
uptr pc = events[thr->fast_state.GetTracePos()];
|
|
return pc;
|
|
}
|
|
|
|
uptr TraceSize() {
|
|
return (uptr)(1ull << (kTracePartSizeBits + flags()->history_size + 1));
|
|
}
|
|
|
|
uptr TraceParts() {
|
|
return TraceSize() / kTracePartSize;
|
|
}
|
|
|
|
#if !SANITIZER_GO
|
|
extern "C" void __tsan_trace_switch() {
|
|
TraceSwitch(cur_thread());
|
|
}
|
|
|
|
extern "C" void __tsan_report_race() {
|
|
ReportRace(cur_thread());
|
|
}
|
|
#endif
|
|
|
|
void ThreadIgnoreBegin(ThreadState *thr, uptr pc) {
|
|
DPrintf("#%d: ThreadIgnoreBegin\n", thr->tid);
|
|
thr->ignore_reads_and_writes++;
|
|
CHECK_GT(thr->ignore_reads_and_writes, 0);
|
|
thr->fast_state.SetIgnoreBit();
|
|
#if !SANITIZER_GO
|
|
if (pc && !ctx->after_multithreaded_fork)
|
|
thr->mop_ignore_set.Add(CurrentStackId(thr, pc));
|
|
#endif
|
|
}
|
|
|
|
void ThreadIgnoreEnd(ThreadState *thr) {
|
|
DPrintf("#%d: ThreadIgnoreEnd\n", thr->tid);
|
|
CHECK_GT(thr->ignore_reads_and_writes, 0);
|
|
thr->ignore_reads_and_writes--;
|
|
if (thr->ignore_reads_and_writes == 0) {
|
|
thr->fast_state.ClearIgnoreBit();
|
|
#if !SANITIZER_GO
|
|
thr->mop_ignore_set.Reset();
|
|
#endif
|
|
}
|
|
}
|
|
|
|
#if !SANITIZER_GO
|
|
extern "C" SANITIZER_INTERFACE_ATTRIBUTE
|
|
uptr __tsan_testonly_shadow_stack_current_size() {
|
|
ThreadState *thr = cur_thread();
|
|
return thr->shadow_stack_pos - thr->shadow_stack;
|
|
}
|
|
#endif
|
|
|
|
void ThreadIgnoreSyncBegin(ThreadState *thr, uptr pc) {
|
|
DPrintf("#%d: ThreadIgnoreSyncBegin\n", thr->tid);
|
|
thr->ignore_sync++;
|
|
CHECK_GT(thr->ignore_sync, 0);
|
|
#if !SANITIZER_GO
|
|
if (pc && !ctx->after_multithreaded_fork)
|
|
thr->sync_ignore_set.Add(CurrentStackId(thr, pc));
|
|
#endif
|
|
}
|
|
|
|
void ThreadIgnoreSyncEnd(ThreadState *thr) {
|
|
DPrintf("#%d: ThreadIgnoreSyncEnd\n", thr->tid);
|
|
CHECK_GT(thr->ignore_sync, 0);
|
|
thr->ignore_sync--;
|
|
#if !SANITIZER_GO
|
|
if (thr->ignore_sync == 0)
|
|
thr->sync_ignore_set.Reset();
|
|
#endif
|
|
}
|
|
|
|
bool MD5Hash::operator==(const MD5Hash &other) const {
|
|
return hash[0] == other.hash[0] && hash[1] == other.hash[1];
|
|
}
|
|
|
|
#if SANITIZER_DEBUG
|
|
void build_consistency_debug() {}
|
|
#else
|
|
void build_consistency_release() {}
|
|
#endif
|
|
|
|
} // namespace __tsan
|
|
|
|
#if SANITIZER_CHECK_DEADLOCKS
|
|
namespace __sanitizer {
|
|
using namespace __tsan;
|
|
MutexMeta mutex_meta[] = {
|
|
{MutexInvalid, "Invalid", {}},
|
|
{MutexThreadRegistry, "ThreadRegistry", {}},
|
|
{MutexTypeTrace, "Trace", {MutexLeaf}},
|
|
{MutexTypeReport, "Report", {MutexTypeSyncVar}},
|
|
{MutexTypeSyncVar, "SyncVar", {}},
|
|
{MutexTypeAnnotations, "Annotations", {}},
|
|
{MutexTypeAtExit, "AtExit", {MutexTypeSyncVar}},
|
|
{MutexTypeFired, "Fired", {MutexLeaf}},
|
|
{MutexTypeRacy, "Racy", {MutexLeaf}},
|
|
{MutexTypeGlobalProc, "GlobalProc", {}},
|
|
{},
|
|
};
|
|
|
|
void PrintMutexPC(uptr pc) { StackTrace(&pc, 1).Print(); }
|
|
} // namespace __sanitizer
|
|
#endif
|