552 lines
16 KiB
C++
552 lines
16 KiB
C++
//===-- tsan_interface_ann.cc ---------------------------------------------===//
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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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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//===----------------------------------------------------------------------===//
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#include "sanitizer_common/sanitizer_libc.h"
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#include "sanitizer_common/sanitizer_internal_defs.h"
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#include "sanitizer_common/sanitizer_placement_new.h"
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#include "sanitizer_common/sanitizer_stacktrace.h"
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#include "sanitizer_common/sanitizer_vector.h"
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#include "tsan_interface_ann.h"
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#include "tsan_mutex.h"
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#include "tsan_report.h"
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#include "tsan_rtl.h"
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#include "tsan_mman.h"
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#include "tsan_flags.h"
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#include "tsan_platform.h"
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#define CALLERPC ((uptr)__builtin_return_address(0))
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using namespace __tsan; // NOLINT
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namespace __tsan {
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class ScopedAnnotation {
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public:
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ScopedAnnotation(ThreadState *thr, const char *aname, uptr pc)
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: thr_(thr) {
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FuncEntry(thr_, pc);
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DPrintf("#%d: annotation %s()\n", thr_->tid, aname);
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}
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~ScopedAnnotation() {
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FuncExit(thr_);
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CheckNoLocks(thr_);
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}
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private:
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ThreadState *const thr_;
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};
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#define SCOPED_ANNOTATION_RET(typ, ret) \
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if (!flags()->enable_annotations) \
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return ret; \
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ThreadState *thr = cur_thread(); \
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const uptr caller_pc = (uptr)__builtin_return_address(0); \
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StatInc(thr, StatAnnotation); \
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StatInc(thr, Stat##typ); \
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ScopedAnnotation sa(thr, __func__, caller_pc); \
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const uptr pc = StackTrace::GetCurrentPc(); \
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(void)pc; \
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/**/
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#define SCOPED_ANNOTATION(typ) SCOPED_ANNOTATION_RET(typ, )
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static const int kMaxDescLen = 128;
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struct ExpectRace {
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ExpectRace *next;
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ExpectRace *prev;
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atomic_uintptr_t hitcount;
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atomic_uintptr_t addcount;
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uptr addr;
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uptr size;
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char *file;
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int line;
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char desc[kMaxDescLen];
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};
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struct DynamicAnnContext {
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Mutex mtx;
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ExpectRace expect;
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ExpectRace benign;
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DynamicAnnContext()
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: mtx(MutexTypeAnnotations, StatMtxAnnotations) {
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}
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};
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static DynamicAnnContext *dyn_ann_ctx;
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static char dyn_ann_ctx_placeholder[sizeof(DynamicAnnContext)] ALIGNED(64);
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static void AddExpectRace(ExpectRace *list,
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char *f, int l, uptr addr, uptr size, char *desc) {
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ExpectRace *race = list->next;
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for (; race != list; race = race->next) {
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if (race->addr == addr && race->size == size) {
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atomic_store_relaxed(&race->addcount,
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atomic_load_relaxed(&race->addcount) + 1);
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return;
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}
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}
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race = (ExpectRace*)internal_alloc(MBlockExpectRace, sizeof(ExpectRace));
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race->addr = addr;
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race->size = size;
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race->file = f;
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race->line = l;
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race->desc[0] = 0;
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atomic_store_relaxed(&race->hitcount, 0);
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atomic_store_relaxed(&race->addcount, 1);
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if (desc) {
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int i = 0;
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for (; i < kMaxDescLen - 1 && desc[i]; i++)
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race->desc[i] = desc[i];
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race->desc[i] = 0;
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}
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race->prev = list;
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race->next = list->next;
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race->next->prev = race;
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list->next = race;
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}
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static ExpectRace *FindRace(ExpectRace *list, uptr addr, uptr size) {
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for (ExpectRace *race = list->next; race != list; race = race->next) {
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uptr maxbegin = max(race->addr, addr);
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uptr minend = min(race->addr + race->size, addr + size);
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if (maxbegin < minend)
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return race;
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}
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return 0;
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}
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static bool CheckContains(ExpectRace *list, uptr addr, uptr size) {
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ExpectRace *race = FindRace(list, addr, size);
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if (race == 0)
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return false;
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DPrintf("Hit expected/benign race: %s addr=%zx:%d %s:%d\n",
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race->desc, race->addr, (int)race->size, race->file, race->line);
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atomic_fetch_add(&race->hitcount, 1, memory_order_relaxed);
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return true;
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}
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static void InitList(ExpectRace *list) {
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list->next = list;
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list->prev = list;
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}
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void InitializeDynamicAnnotations() {
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dyn_ann_ctx = new(dyn_ann_ctx_placeholder) DynamicAnnContext;
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InitList(&dyn_ann_ctx->expect);
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InitList(&dyn_ann_ctx->benign);
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}
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bool IsExpectedReport(uptr addr, uptr size) {
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ReadLock lock(&dyn_ann_ctx->mtx);
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if (CheckContains(&dyn_ann_ctx->expect, addr, size))
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return true;
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if (CheckContains(&dyn_ann_ctx->benign, addr, size))
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return true;
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return false;
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}
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static void CollectMatchedBenignRaces(Vector<ExpectRace> *matched,
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int *unique_count, int *hit_count, atomic_uintptr_t ExpectRace::*counter) {
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ExpectRace *list = &dyn_ann_ctx->benign;
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for (ExpectRace *race = list->next; race != list; race = race->next) {
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(*unique_count)++;
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const uptr cnt = atomic_load_relaxed(&(race->*counter));
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if (cnt == 0)
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continue;
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*hit_count += cnt;
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uptr i = 0;
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for (; i < matched->Size(); i++) {
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ExpectRace *race0 = &(*matched)[i];
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if (race->line == race0->line
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&& internal_strcmp(race->file, race0->file) == 0
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&& internal_strcmp(race->desc, race0->desc) == 0) {
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atomic_fetch_add(&(race0->*counter), cnt, memory_order_relaxed);
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break;
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}
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}
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if (i == matched->Size())
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matched->PushBack(*race);
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}
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}
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void PrintMatchedBenignRaces() {
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Lock lock(&dyn_ann_ctx->mtx);
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int unique_count = 0;
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int hit_count = 0;
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int add_count = 0;
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Vector<ExpectRace> hit_matched;
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CollectMatchedBenignRaces(&hit_matched, &unique_count, &hit_count,
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&ExpectRace::hitcount);
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Vector<ExpectRace> add_matched;
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CollectMatchedBenignRaces(&add_matched, &unique_count, &add_count,
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&ExpectRace::addcount);
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if (hit_matched.Size()) {
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Printf("ThreadSanitizer: Matched %d \"benign\" races (pid=%d):\n",
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hit_count, (int)internal_getpid());
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for (uptr i = 0; i < hit_matched.Size(); i++) {
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Printf("%d %s:%d %s\n",
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atomic_load_relaxed(&hit_matched[i].hitcount),
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hit_matched[i].file, hit_matched[i].line, hit_matched[i].desc);
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}
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}
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if (hit_matched.Size()) {
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Printf("ThreadSanitizer: Annotated %d \"benign\" races, %d unique"
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" (pid=%d):\n",
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add_count, unique_count, (int)internal_getpid());
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for (uptr i = 0; i < add_matched.Size(); i++) {
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Printf("%d %s:%d %s\n",
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atomic_load_relaxed(&add_matched[i].addcount),
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add_matched[i].file, add_matched[i].line, add_matched[i].desc);
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}
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}
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}
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static void ReportMissedExpectedRace(ExpectRace *race) {
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Printf("==================\n");
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Printf("WARNING: ThreadSanitizer: missed expected data race\n");
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Printf(" %s addr=%zx %s:%d\n",
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race->desc, race->addr, race->file, race->line);
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Printf("==================\n");
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}
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} // namespace __tsan
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using namespace __tsan; // NOLINT
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extern "C" {
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void INTERFACE_ATTRIBUTE AnnotateHappensBefore(char *f, int l, uptr addr) {
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SCOPED_ANNOTATION(AnnotateHappensBefore);
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Release(thr, pc, addr);
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}
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void INTERFACE_ATTRIBUTE AnnotateHappensAfter(char *f, int l, uptr addr) {
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SCOPED_ANNOTATION(AnnotateHappensAfter);
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Acquire(thr, pc, addr);
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}
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void INTERFACE_ATTRIBUTE AnnotateCondVarSignal(char *f, int l, uptr cv) {
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SCOPED_ANNOTATION(AnnotateCondVarSignal);
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}
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void INTERFACE_ATTRIBUTE AnnotateCondVarSignalAll(char *f, int l, uptr cv) {
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SCOPED_ANNOTATION(AnnotateCondVarSignalAll);
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}
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void INTERFACE_ATTRIBUTE AnnotateMutexIsNotPHB(char *f, int l, uptr mu) {
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SCOPED_ANNOTATION(AnnotateMutexIsNotPHB);
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}
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void INTERFACE_ATTRIBUTE AnnotateCondVarWait(char *f, int l, uptr cv,
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uptr lock) {
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SCOPED_ANNOTATION(AnnotateCondVarWait);
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}
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void INTERFACE_ATTRIBUTE AnnotateRWLockCreate(char *f, int l, uptr m) {
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SCOPED_ANNOTATION(AnnotateRWLockCreate);
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MutexCreate(thr, pc, m, MutexFlagWriteReentrant);
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}
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void INTERFACE_ATTRIBUTE AnnotateRWLockCreateStatic(char *f, int l, uptr m) {
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SCOPED_ANNOTATION(AnnotateRWLockCreateStatic);
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MutexCreate(thr, pc, m, MutexFlagWriteReentrant | MutexFlagLinkerInit);
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}
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void INTERFACE_ATTRIBUTE AnnotateRWLockDestroy(char *f, int l, uptr m) {
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SCOPED_ANNOTATION(AnnotateRWLockDestroy);
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MutexDestroy(thr, pc, m);
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}
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void INTERFACE_ATTRIBUTE AnnotateRWLockAcquired(char *f, int l, uptr m,
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uptr is_w) {
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SCOPED_ANNOTATION(AnnotateRWLockAcquired);
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if (is_w)
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MutexPostLock(thr, pc, m, MutexFlagDoPreLockOnPostLock);
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else
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MutexPostReadLock(thr, pc, m, MutexFlagDoPreLockOnPostLock);
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}
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void INTERFACE_ATTRIBUTE AnnotateRWLockReleased(char *f, int l, uptr m,
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uptr is_w) {
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SCOPED_ANNOTATION(AnnotateRWLockReleased);
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if (is_w)
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MutexUnlock(thr, pc, m);
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else
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MutexReadUnlock(thr, pc, m);
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}
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void INTERFACE_ATTRIBUTE AnnotateTraceMemory(char *f, int l, uptr mem) {
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SCOPED_ANNOTATION(AnnotateTraceMemory);
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}
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void INTERFACE_ATTRIBUTE AnnotateFlushState(char *f, int l) {
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SCOPED_ANNOTATION(AnnotateFlushState);
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}
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void INTERFACE_ATTRIBUTE AnnotateNewMemory(char *f, int l, uptr mem,
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uptr size) {
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SCOPED_ANNOTATION(AnnotateNewMemory);
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}
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void INTERFACE_ATTRIBUTE AnnotateNoOp(char *f, int l, uptr mem) {
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SCOPED_ANNOTATION(AnnotateNoOp);
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}
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void INTERFACE_ATTRIBUTE AnnotateFlushExpectedRaces(char *f, int l) {
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SCOPED_ANNOTATION(AnnotateFlushExpectedRaces);
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Lock lock(&dyn_ann_ctx->mtx);
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while (dyn_ann_ctx->expect.next != &dyn_ann_ctx->expect) {
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ExpectRace *race = dyn_ann_ctx->expect.next;
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if (atomic_load_relaxed(&race->hitcount) == 0) {
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ctx->nmissed_expected++;
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ReportMissedExpectedRace(race);
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}
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race->prev->next = race->next;
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race->next->prev = race->prev;
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internal_free(race);
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}
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}
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void INTERFACE_ATTRIBUTE AnnotateEnableRaceDetection(
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char *f, int l, int enable) {
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SCOPED_ANNOTATION(AnnotateEnableRaceDetection);
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// FIXME: Reconsider this functionality later. It may be irrelevant.
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}
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void INTERFACE_ATTRIBUTE AnnotateMutexIsUsedAsCondVar(
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char *f, int l, uptr mu) {
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SCOPED_ANNOTATION(AnnotateMutexIsUsedAsCondVar);
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}
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void INTERFACE_ATTRIBUTE AnnotatePCQGet(
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char *f, int l, uptr pcq) {
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SCOPED_ANNOTATION(AnnotatePCQGet);
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}
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void INTERFACE_ATTRIBUTE AnnotatePCQPut(
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char *f, int l, uptr pcq) {
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SCOPED_ANNOTATION(AnnotatePCQPut);
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}
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void INTERFACE_ATTRIBUTE AnnotatePCQDestroy(
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char *f, int l, uptr pcq) {
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SCOPED_ANNOTATION(AnnotatePCQDestroy);
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}
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void INTERFACE_ATTRIBUTE AnnotatePCQCreate(
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char *f, int l, uptr pcq) {
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SCOPED_ANNOTATION(AnnotatePCQCreate);
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}
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void INTERFACE_ATTRIBUTE AnnotateExpectRace(
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char *f, int l, uptr mem, char *desc) {
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SCOPED_ANNOTATION(AnnotateExpectRace);
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Lock lock(&dyn_ann_ctx->mtx);
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AddExpectRace(&dyn_ann_ctx->expect,
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f, l, mem, 1, desc);
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DPrintf("Add expected race: %s addr=%zx %s:%d\n", desc, mem, f, l);
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}
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static void BenignRaceImpl(
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char *f, int l, uptr mem, uptr size, char *desc) {
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Lock lock(&dyn_ann_ctx->mtx);
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AddExpectRace(&dyn_ann_ctx->benign,
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f, l, mem, size, desc);
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DPrintf("Add benign race: %s addr=%zx %s:%d\n", desc, mem, f, l);
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}
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// FIXME: Turn it off later. WTF is benign race?1?? Go talk to Hans Boehm.
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void INTERFACE_ATTRIBUTE AnnotateBenignRaceSized(
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char *f, int l, uptr mem, uptr size, char *desc) {
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SCOPED_ANNOTATION(AnnotateBenignRaceSized);
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BenignRaceImpl(f, l, mem, size, desc);
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}
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void INTERFACE_ATTRIBUTE AnnotateBenignRace(
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char *f, int l, uptr mem, char *desc) {
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SCOPED_ANNOTATION(AnnotateBenignRace);
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BenignRaceImpl(f, l, mem, 1, desc);
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}
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void INTERFACE_ATTRIBUTE AnnotateIgnoreReadsBegin(char *f, int l) {
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SCOPED_ANNOTATION(AnnotateIgnoreReadsBegin);
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ThreadIgnoreBegin(thr, pc);
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}
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void INTERFACE_ATTRIBUTE AnnotateIgnoreReadsEnd(char *f, int l) {
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SCOPED_ANNOTATION(AnnotateIgnoreReadsEnd);
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ThreadIgnoreEnd(thr, pc);
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}
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void INTERFACE_ATTRIBUTE AnnotateIgnoreWritesBegin(char *f, int l) {
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SCOPED_ANNOTATION(AnnotateIgnoreWritesBegin);
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ThreadIgnoreBegin(thr, pc);
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}
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void INTERFACE_ATTRIBUTE AnnotateIgnoreWritesEnd(char *f, int l) {
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SCOPED_ANNOTATION(AnnotateIgnoreWritesEnd);
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ThreadIgnoreEnd(thr, pc);
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}
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void INTERFACE_ATTRIBUTE AnnotateIgnoreSyncBegin(char *f, int l) {
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SCOPED_ANNOTATION(AnnotateIgnoreSyncBegin);
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ThreadIgnoreSyncBegin(thr, pc);
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}
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void INTERFACE_ATTRIBUTE AnnotateIgnoreSyncEnd(char *f, int l) {
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SCOPED_ANNOTATION(AnnotateIgnoreSyncEnd);
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ThreadIgnoreSyncEnd(thr, pc);
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}
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void INTERFACE_ATTRIBUTE AnnotatePublishMemoryRange(
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char *f, int l, uptr addr, uptr size) {
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SCOPED_ANNOTATION(AnnotatePublishMemoryRange);
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}
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void INTERFACE_ATTRIBUTE AnnotateUnpublishMemoryRange(
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char *f, int l, uptr addr, uptr size) {
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SCOPED_ANNOTATION(AnnotateUnpublishMemoryRange);
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}
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void INTERFACE_ATTRIBUTE AnnotateThreadName(
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char *f, int l, char *name) {
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SCOPED_ANNOTATION(AnnotateThreadName);
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ThreadSetName(thr, name);
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}
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// We deliberately omit the implementation of WTFAnnotateHappensBefore() and
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// WTFAnnotateHappensAfter(). Those are being used by Webkit to annotate
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// atomic operations, which should be handled by ThreadSanitizer correctly.
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void INTERFACE_ATTRIBUTE WTFAnnotateHappensBefore(char *f, int l, uptr addr) {
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SCOPED_ANNOTATION(AnnotateHappensBefore);
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}
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void INTERFACE_ATTRIBUTE WTFAnnotateHappensAfter(char *f, int l, uptr addr) {
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SCOPED_ANNOTATION(AnnotateHappensAfter);
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}
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void INTERFACE_ATTRIBUTE WTFAnnotateBenignRaceSized(
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char *f, int l, uptr mem, uptr sz, char *desc) {
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SCOPED_ANNOTATION(AnnotateBenignRaceSized);
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BenignRaceImpl(f, l, mem, sz, desc);
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}
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int INTERFACE_ATTRIBUTE RunningOnValgrind() {
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return flags()->running_on_valgrind;
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}
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double __attribute__((weak)) INTERFACE_ATTRIBUTE ValgrindSlowdown(void) {
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return 10.0;
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}
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const char INTERFACE_ATTRIBUTE* ThreadSanitizerQuery(const char *query) {
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if (internal_strcmp(query, "pure_happens_before") == 0)
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return "1";
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else
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return "0";
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}
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void INTERFACE_ATTRIBUTE
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AnnotateMemoryIsInitialized(char *f, int l, uptr mem, uptr sz) {}
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void INTERFACE_ATTRIBUTE
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AnnotateMemoryIsUninitialized(char *f, int l, uptr mem, uptr sz) {}
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// Note: the parameter is called flagz, because flags is already taken
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// by the global function that returns flags.
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INTERFACE_ATTRIBUTE
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void __tsan_mutex_create(void *m, unsigned flagz) {
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SCOPED_ANNOTATION(__tsan_mutex_create);
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MutexCreate(thr, pc, (uptr)m, flagz & MutexCreationFlagMask);
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}
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INTERFACE_ATTRIBUTE
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void __tsan_mutex_destroy(void *m, unsigned flagz) {
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|
SCOPED_ANNOTATION(__tsan_mutex_destroy);
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|
MutexDestroy(thr, pc, (uptr)m, flagz);
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|
}
|
|
|
|
INTERFACE_ATTRIBUTE
|
|
void __tsan_mutex_pre_lock(void *m, unsigned flagz) {
|
|
SCOPED_ANNOTATION(__tsan_mutex_pre_lock);
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|
if (!(flagz & MutexFlagTryLock)) {
|
|
if (flagz & MutexFlagReadLock)
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|
MutexPreReadLock(thr, pc, (uptr)m);
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|
else
|
|
MutexPreLock(thr, pc, (uptr)m);
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|
}
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|
ThreadIgnoreBegin(thr, pc, /*save_stack=*/false);
|
|
ThreadIgnoreSyncBegin(thr, pc, /*save_stack=*/false);
|
|
}
|
|
|
|
INTERFACE_ATTRIBUTE
|
|
void __tsan_mutex_post_lock(void *m, unsigned flagz, int rec) {
|
|
SCOPED_ANNOTATION(__tsan_mutex_post_lock);
|
|
ThreadIgnoreSyncEnd(thr, pc);
|
|
ThreadIgnoreEnd(thr, pc);
|
|
if (!(flagz & MutexFlagTryLockFailed)) {
|
|
if (flagz & MutexFlagReadLock)
|
|
MutexPostReadLock(thr, pc, (uptr)m, flagz);
|
|
else
|
|
MutexPostLock(thr, pc, (uptr)m, flagz, rec);
|
|
}
|
|
}
|
|
|
|
INTERFACE_ATTRIBUTE
|
|
int __tsan_mutex_pre_unlock(void *m, unsigned flagz) {
|
|
SCOPED_ANNOTATION_RET(__tsan_mutex_pre_unlock, 0);
|
|
int ret = 0;
|
|
if (flagz & MutexFlagReadLock) {
|
|
CHECK(!(flagz & MutexFlagRecursiveUnlock));
|
|
MutexReadUnlock(thr, pc, (uptr)m);
|
|
} else {
|
|
ret = MutexUnlock(thr, pc, (uptr)m, flagz);
|
|
}
|
|
ThreadIgnoreBegin(thr, pc, /*save_stack=*/false);
|
|
ThreadIgnoreSyncBegin(thr, pc, /*save_stack=*/false);
|
|
return ret;
|
|
}
|
|
|
|
INTERFACE_ATTRIBUTE
|
|
void __tsan_mutex_post_unlock(void *m, unsigned flagz) {
|
|
SCOPED_ANNOTATION(__tsan_mutex_post_unlock);
|
|
ThreadIgnoreSyncEnd(thr, pc);
|
|
ThreadIgnoreEnd(thr, pc);
|
|
}
|
|
|
|
INTERFACE_ATTRIBUTE
|
|
void __tsan_mutex_pre_signal(void *addr, unsigned flagz) {
|
|
SCOPED_ANNOTATION(__tsan_mutex_pre_signal);
|
|
ThreadIgnoreBegin(thr, pc, /*save_stack=*/false);
|
|
ThreadIgnoreSyncBegin(thr, pc, /*save_stack=*/false);
|
|
}
|
|
|
|
INTERFACE_ATTRIBUTE
|
|
void __tsan_mutex_post_signal(void *addr, unsigned flagz) {
|
|
SCOPED_ANNOTATION(__tsan_mutex_post_signal);
|
|
ThreadIgnoreSyncEnd(thr, pc);
|
|
ThreadIgnoreEnd(thr, pc);
|
|
}
|
|
|
|
INTERFACE_ATTRIBUTE
|
|
void __tsan_mutex_pre_divert(void *addr, unsigned flagz) {
|
|
SCOPED_ANNOTATION(__tsan_mutex_pre_divert);
|
|
// Exit from ignore region started in __tsan_mutex_pre_lock/unlock/signal.
|
|
ThreadIgnoreSyncEnd(thr, pc);
|
|
ThreadIgnoreEnd(thr, pc);
|
|
}
|
|
|
|
INTERFACE_ATTRIBUTE
|
|
void __tsan_mutex_post_divert(void *addr, unsigned flagz) {
|
|
SCOPED_ANNOTATION(__tsan_mutex_post_divert);
|
|
ThreadIgnoreBegin(thr, pc, /*save_stack=*/false);
|
|
ThreadIgnoreSyncBegin(thr, pc, /*save_stack=*/false);
|
|
}
|
|
} // extern "C"
|