741 lines
23 KiB
C++
741 lines
23 KiB
C++
//===-- tsan_rtl_report.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_placement_new.h"
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#include "sanitizer_common/sanitizer_stackdepot.h"
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#include "sanitizer_common/sanitizer_common.h"
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#include "sanitizer_common/sanitizer_stacktrace.h"
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#include "tsan_platform.h"
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#include "tsan_rtl.h"
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#include "tsan_suppressions.h"
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#include "tsan_symbolize.h"
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#include "tsan_report.h"
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#include "tsan_sync.h"
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#include "tsan_mman.h"
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#include "tsan_flags.h"
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#include "tsan_fd.h"
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namespace __tsan {
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using namespace __sanitizer; // NOLINT
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static ReportStack *SymbolizeStack(const StackTrace& trace);
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void TsanCheckFailed(const char *file, int line, const char *cond,
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u64 v1, u64 v2) {
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ScopedInRtl in_rtl;
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Printf("FATAL: ThreadSanitizer CHECK failed: "
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"%s:%d \"%s\" (0x%zx, 0x%zx)\n",
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file, line, cond, (uptr)v1, (uptr)v2);
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PrintCurrentStackSlow();
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Die();
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}
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// Can be overriden by an application/test to intercept reports.
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#ifdef TSAN_EXTERNAL_HOOKS
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bool OnReport(const ReportDesc *rep, bool suppressed);
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#else
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SANITIZER_INTERFACE_ATTRIBUTE
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bool WEAK OnReport(const ReportDesc *rep, bool suppressed) {
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(void)rep;
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return suppressed;
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}
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#endif
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static void StackStripMain(ReportStack *stack) {
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ReportStack *last_frame = 0;
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ReportStack *last_frame2 = 0;
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const char *prefix = "__interceptor_";
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uptr prefix_len = internal_strlen(prefix);
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const char *path_prefix = flags()->strip_path_prefix;
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uptr path_prefix_len = internal_strlen(path_prefix);
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char *pos;
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for (ReportStack *ent = stack; ent; ent = ent->next) {
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if (ent->func && 0 == internal_strncmp(ent->func, prefix, prefix_len))
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ent->func += prefix_len;
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if (ent->file && (pos = internal_strstr(ent->file, path_prefix)))
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ent->file = pos + path_prefix_len;
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if (ent->file && ent->file[0] == '.' && ent->file[1] == '/')
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ent->file += 2;
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last_frame2 = last_frame;
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last_frame = ent;
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}
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if (last_frame2 == 0)
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return;
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const char *last = last_frame->func;
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#ifndef TSAN_GO
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const char *last2 = last_frame2->func;
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// Strip frame above 'main'
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if (last2 && 0 == internal_strcmp(last2, "main")) {
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last_frame2->next = 0;
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// Strip our internal thread start routine.
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} else if (last && 0 == internal_strcmp(last, "__tsan_thread_start_func")) {
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last_frame2->next = 0;
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// Strip global ctors init.
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} else if (last && 0 == internal_strcmp(last, "__do_global_ctors_aux")) {
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last_frame2->next = 0;
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// If both are 0, then we probably just failed to symbolize.
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} else if (last || last2) {
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// Ensure that we recovered stack completely. Trimmed stack
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// can actually happen if we do not instrument some code,
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// so it's only a debug print. However we must try hard to not miss it
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// due to our fault.
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DPrintf("Bottom stack frame of stack %zx is missed\n", stack->pc);
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}
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#else
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// The last frame always point into runtime (gosched0, goexit0, runtime.main).
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last_frame2->next = 0;
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(void)last;
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#endif
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}
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static ReportStack *SymbolizeStack(const StackTrace& trace) {
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if (trace.IsEmpty())
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return 0;
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ReportStack *stack = 0;
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for (uptr si = 0; si < trace.Size(); si++) {
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const uptr pc = trace.Get(si);
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#ifndef TSAN_GO
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// We obtain the return address, that is, address of the next instruction,
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// so offset it by 1 byte.
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const uptr pc1 = __sanitizer::StackTrace::GetPreviousInstructionPc(pc);
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#else
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// FIXME(dvyukov): Go sometimes uses address of a function as top pc.
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uptr pc1 = pc;
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if (si != trace.Size() - 1)
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pc1 -= 1;
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#endif
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ReportStack *ent = SymbolizeCode(pc1);
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CHECK_NE(ent, 0);
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ReportStack *last = ent;
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while (last->next) {
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last->pc = pc; // restore original pc for report
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last = last->next;
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}
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last->pc = pc; // restore original pc for report
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last->next = stack;
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stack = ent;
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}
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StackStripMain(stack);
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return stack;
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}
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ScopedReport::ScopedReport(ReportType typ) {
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ctx_ = CTX();
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ctx_->thread_registry->CheckLocked();
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void *mem = internal_alloc(MBlockReport, sizeof(ReportDesc));
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rep_ = new(mem) ReportDesc;
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rep_->typ = typ;
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ctx_->report_mtx.Lock();
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CommonSanitizerReportMutex.Lock();
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}
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ScopedReport::~ScopedReport() {
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CommonSanitizerReportMutex.Unlock();
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ctx_->report_mtx.Unlock();
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DestroyAndFree(rep_);
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}
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void ScopedReport::AddStack(const StackTrace *stack) {
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ReportStack **rs = rep_->stacks.PushBack();
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*rs = SymbolizeStack(*stack);
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}
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void ScopedReport::AddMemoryAccess(uptr addr, Shadow s,
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const StackTrace *stack, const MutexSet *mset) {
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void *mem = internal_alloc(MBlockReportMop, sizeof(ReportMop));
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ReportMop *mop = new(mem) ReportMop;
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rep_->mops.PushBack(mop);
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mop->tid = s.tid();
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mop->addr = addr + s.addr0();
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mop->size = s.size();
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mop->write = s.IsWrite();
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mop->atomic = s.IsAtomic();
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mop->stack = SymbolizeStack(*stack);
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for (uptr i = 0; i < mset->Size(); i++) {
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MutexSet::Desc d = mset->Get(i);
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u64 uid = 0;
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uptr addr = SyncVar::SplitId(d.id, &uid);
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SyncVar *s = ctx_->synctab.GetIfExistsAndLock(addr, false);
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// Check that the mutex is still alive.
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// Another mutex can be created at the same address,
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// so check uid as well.
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if (s && s->CheckId(uid)) {
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ReportMopMutex mtx = {s->uid, d.write};
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mop->mset.PushBack(mtx);
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AddMutex(s);
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} else {
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ReportMopMutex mtx = {d.id, d.write};
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mop->mset.PushBack(mtx);
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AddMutex(d.id);
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}
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if (s)
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s->mtx.ReadUnlock();
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}
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}
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void ScopedReport::AddThread(const ThreadContext *tctx) {
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for (uptr i = 0; i < rep_->threads.Size(); i++) {
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if ((u32)rep_->threads[i]->id == tctx->tid)
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return;
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}
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void *mem = internal_alloc(MBlockReportThread, sizeof(ReportThread));
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ReportThread *rt = new(mem) ReportThread();
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rep_->threads.PushBack(rt);
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rt->id = tctx->tid;
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rt->pid = tctx->os_id;
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rt->running = (tctx->status == ThreadStatusRunning);
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rt->name = tctx->name ? internal_strdup(tctx->name) : 0;
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rt->parent_tid = tctx->parent_tid;
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rt->stack = 0;
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#ifdef TSAN_GO
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rt->stack = SymbolizeStack(tctx->creation_stack);
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#else
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uptr ssz = 0;
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const uptr *stack = StackDepotGet(tctx->creation_stack_id, &ssz);
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if (stack) {
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StackTrace trace;
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trace.Init(stack, ssz);
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rt->stack = SymbolizeStack(trace);
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}
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#endif
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}
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#ifndef TSAN_GO
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static ThreadContext *FindThreadByUidLocked(int unique_id) {
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Context *ctx = CTX();
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ctx->thread_registry->CheckLocked();
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for (unsigned i = 0; i < kMaxTid; i++) {
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ThreadContext *tctx = static_cast<ThreadContext*>(
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ctx->thread_registry->GetThreadLocked(i));
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if (tctx && tctx->unique_id == (u32)unique_id) {
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return tctx;
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}
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}
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return 0;
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}
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static ThreadContext *FindThreadByTidLocked(int tid) {
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Context *ctx = CTX();
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ctx->thread_registry->CheckLocked();
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return static_cast<ThreadContext*>(
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ctx->thread_registry->GetThreadLocked(tid));
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}
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static bool IsInStackOrTls(ThreadContextBase *tctx_base, void *arg) {
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uptr addr = (uptr)arg;
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ThreadContext *tctx = static_cast<ThreadContext*>(tctx_base);
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if (tctx->status != ThreadStatusRunning)
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return false;
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ThreadState *thr = tctx->thr;
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CHECK(thr);
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return ((addr >= thr->stk_addr && addr < thr->stk_addr + thr->stk_size) ||
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(addr >= thr->tls_addr && addr < thr->tls_addr + thr->tls_size));
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}
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ThreadContext *IsThreadStackOrTls(uptr addr, bool *is_stack) {
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Context *ctx = CTX();
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ctx->thread_registry->CheckLocked();
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ThreadContext *tctx = static_cast<ThreadContext*>(
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ctx->thread_registry->FindThreadContextLocked(IsInStackOrTls,
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(void*)addr));
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if (!tctx)
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return 0;
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ThreadState *thr = tctx->thr;
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CHECK(thr);
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*is_stack = (addr >= thr->stk_addr && addr < thr->stk_addr + thr->stk_size);
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return tctx;
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}
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#endif
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void ScopedReport::AddMutex(const SyncVar *s) {
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for (uptr i = 0; i < rep_->mutexes.Size(); i++) {
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if (rep_->mutexes[i]->id == s->uid)
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return;
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}
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void *mem = internal_alloc(MBlockReportMutex, sizeof(ReportMutex));
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ReportMutex *rm = new(mem) ReportMutex();
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rep_->mutexes.PushBack(rm);
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rm->id = s->uid;
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rm->destroyed = false;
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rm->stack = 0;
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#ifndef TSAN_GO
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uptr ssz = 0;
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const uptr *stack = StackDepotGet(s->creation_stack_id, &ssz);
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if (stack) {
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StackTrace trace;
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trace.Init(stack, ssz);
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rm->stack = SymbolizeStack(trace);
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}
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#endif
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}
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void ScopedReport::AddMutex(u64 id) {
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for (uptr i = 0; i < rep_->mutexes.Size(); i++) {
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if (rep_->mutexes[i]->id == id)
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return;
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}
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void *mem = internal_alloc(MBlockReportMutex, sizeof(ReportMutex));
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ReportMutex *rm = new(mem) ReportMutex();
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rep_->mutexes.PushBack(rm);
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rm->id = id;
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rm->destroyed = true;
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rm->stack = 0;
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}
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void ScopedReport::AddLocation(uptr addr, uptr size) {
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if (addr == 0)
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return;
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#ifndef TSAN_GO
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int fd = -1;
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int creat_tid = -1;
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u32 creat_stack = 0;
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if (FdLocation(addr, &fd, &creat_tid, &creat_stack)
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|| FdLocation(AlternativeAddress(addr), &fd, &creat_tid, &creat_stack)) {
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void *mem = internal_alloc(MBlockReportLoc, sizeof(ReportLocation));
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ReportLocation *loc = new(mem) ReportLocation();
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rep_->locs.PushBack(loc);
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loc->type = ReportLocationFD;
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loc->fd = fd;
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loc->tid = creat_tid;
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uptr ssz = 0;
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const uptr *stack = StackDepotGet(creat_stack, &ssz);
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if (stack) {
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StackTrace trace;
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trace.Init(stack, ssz);
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loc->stack = SymbolizeStack(trace);
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}
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ThreadContext *tctx = FindThreadByUidLocked(creat_tid);
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if (tctx)
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AddThread(tctx);
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return;
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}
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MBlock *b = 0;
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if (allocator()->PointerIsMine((void*)addr)
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&& (b = user_mblock(0, (void*)addr))) {
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ThreadContext *tctx = FindThreadByTidLocked(b->Tid());
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void *mem = internal_alloc(MBlockReportLoc, sizeof(ReportLocation));
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ReportLocation *loc = new(mem) ReportLocation();
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rep_->locs.PushBack(loc);
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loc->type = ReportLocationHeap;
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loc->addr = (uptr)allocator()->GetBlockBegin((void*)addr);
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loc->size = b->Size();
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loc->tid = tctx ? tctx->tid : b->Tid();
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loc->name = 0;
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loc->file = 0;
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loc->line = 0;
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loc->stack = 0;
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uptr ssz = 0;
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const uptr *stack = StackDepotGet(b->StackId(), &ssz);
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if (stack) {
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StackTrace trace;
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trace.Init(stack, ssz);
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loc->stack = SymbolizeStack(trace);
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}
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if (tctx)
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AddThread(tctx);
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return;
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}
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bool is_stack = false;
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if (ThreadContext *tctx = IsThreadStackOrTls(addr, &is_stack)) {
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void *mem = internal_alloc(MBlockReportLoc, sizeof(ReportLocation));
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ReportLocation *loc = new(mem) ReportLocation();
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rep_->locs.PushBack(loc);
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loc->type = is_stack ? ReportLocationStack : ReportLocationTLS;
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loc->tid = tctx->tid;
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AddThread(tctx);
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}
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ReportLocation *loc = SymbolizeData(addr);
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if (loc) {
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rep_->locs.PushBack(loc);
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return;
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}
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#endif
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}
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#ifndef TSAN_GO
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void ScopedReport::AddSleep(u32 stack_id) {
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uptr ssz = 0;
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const uptr *stack = StackDepotGet(stack_id, &ssz);
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if (stack) {
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StackTrace trace;
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trace.Init(stack, ssz);
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rep_->sleep = SymbolizeStack(trace);
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}
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}
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#endif
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void ScopedReport::SetCount(int count) {
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rep_->count = count;
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}
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const ReportDesc *ScopedReport::GetReport() const {
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return rep_;
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}
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void RestoreStack(int tid, const u64 epoch, StackTrace *stk, MutexSet *mset) {
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// This function restores stack trace and mutex set for the thread/epoch.
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// It does so by getting stack trace and mutex set at the beginning of
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// trace part, and then replaying the trace till the given epoch.
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Context *ctx = CTX();
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ctx->thread_registry->CheckLocked();
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ThreadContext *tctx = static_cast<ThreadContext*>(
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ctx->thread_registry->GetThreadLocked(tid));
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if (tctx == 0)
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return;
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if (tctx->status != ThreadStatusRunning
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&& tctx->status != ThreadStatusFinished
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&& tctx->status != ThreadStatusDead)
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return;
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Trace* trace = ThreadTrace(tctx->tid);
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Lock l(&trace->mtx);
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const int partidx = (epoch / kTracePartSize) % TraceParts();
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TraceHeader* hdr = &trace->headers[partidx];
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if (epoch < hdr->epoch0)
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return;
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const u64 epoch0 = RoundDown(epoch, TraceSize());
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const u64 eend = epoch % TraceSize();
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const u64 ebegin = RoundDown(eend, kTracePartSize);
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DPrintf("#%d: RestoreStack epoch=%zu ebegin=%zu eend=%zu partidx=%d\n",
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tid, (uptr)epoch, (uptr)ebegin, (uptr)eend, partidx);
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InternalScopedBuffer<uptr> stack(1024); // FIXME: de-hardcode 1024
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for (uptr i = 0; i < hdr->stack0.Size(); i++) {
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stack[i] = hdr->stack0.Get(i);
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DPrintf2(" #%02lu: pc=%zx\n", i, stack[i]);
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}
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if (mset)
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*mset = hdr->mset0;
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uptr pos = hdr->stack0.Size();
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Event *events = (Event*)GetThreadTrace(tid);
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for (uptr i = ebegin; i <= eend; i++) {
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Event ev = events[i];
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EventType typ = (EventType)(ev >> 61);
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uptr pc = (uptr)(ev & ((1ull << 61) - 1));
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DPrintf2(" %zu typ=%d pc=%zx\n", i, typ, pc);
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if (typ == EventTypeMop) {
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stack[pos] = pc;
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} else if (typ == EventTypeFuncEnter) {
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stack[pos++] = pc;
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} else if (typ == EventTypeFuncExit) {
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if (pos > 0)
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pos--;
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}
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if (mset) {
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if (typ == EventTypeLock) {
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mset->Add(pc, true, epoch0 + i);
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} else if (typ == EventTypeUnlock) {
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mset->Del(pc, true);
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} else if (typ == EventTypeRLock) {
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mset->Add(pc, false, epoch0 + i);
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} else if (typ == EventTypeRUnlock) {
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mset->Del(pc, false);
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}
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}
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for (uptr j = 0; j <= pos; j++)
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DPrintf2(" #%zu: %zx\n", j, stack[j]);
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}
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if (pos == 0 && stack[0] == 0)
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return;
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pos++;
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stk->Init(stack.data(), pos);
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}
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static bool HandleRacyStacks(ThreadState *thr, const StackTrace (&traces)[2],
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uptr addr_min, uptr addr_max) {
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Context *ctx = CTX();
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bool equal_stack = false;
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RacyStacks hash;
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if (flags()->suppress_equal_stacks) {
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hash.hash[0] = md5_hash(traces[0].Begin(), traces[0].Size() * sizeof(uptr));
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hash.hash[1] = md5_hash(traces[1].Begin(), traces[1].Size() * sizeof(uptr));
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for (uptr i = 0; i < ctx->racy_stacks.Size(); i++) {
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if (hash == ctx->racy_stacks[i]) {
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DPrintf("ThreadSanitizer: suppressing report as doubled (stack)\n");
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equal_stack = true;
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break;
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}
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}
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}
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bool equal_address = false;
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RacyAddress ra0 = {addr_min, addr_max};
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|
if (flags()->suppress_equal_addresses) {
|
|
for (uptr i = 0; i < ctx->racy_addresses.Size(); i++) {
|
|
RacyAddress ra2 = ctx->racy_addresses[i];
|
|
uptr maxbeg = max(ra0.addr_min, ra2.addr_min);
|
|
uptr minend = min(ra0.addr_max, ra2.addr_max);
|
|
if (maxbeg < minend) {
|
|
DPrintf("ThreadSanitizer: suppressing report as doubled (addr)\n");
|
|
equal_address = true;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
if (equal_stack || equal_address) {
|
|
if (!equal_stack)
|
|
ctx->racy_stacks.PushBack(hash);
|
|
if (!equal_address)
|
|
ctx->racy_addresses.PushBack(ra0);
|
|
return true;
|
|
}
|
|
return false;
|
|
}
|
|
|
|
static void AddRacyStacks(ThreadState *thr, const StackTrace (&traces)[2],
|
|
uptr addr_min, uptr addr_max) {
|
|
Context *ctx = CTX();
|
|
if (flags()->suppress_equal_stacks) {
|
|
RacyStacks hash;
|
|
hash.hash[0] = md5_hash(traces[0].Begin(), traces[0].Size() * sizeof(uptr));
|
|
hash.hash[1] = md5_hash(traces[1].Begin(), traces[1].Size() * sizeof(uptr));
|
|
ctx->racy_stacks.PushBack(hash);
|
|
}
|
|
if (flags()->suppress_equal_addresses) {
|
|
RacyAddress ra0 = {addr_min, addr_max};
|
|
ctx->racy_addresses.PushBack(ra0);
|
|
}
|
|
}
|
|
|
|
bool OutputReport(Context *ctx,
|
|
const ScopedReport &srep,
|
|
const ReportStack *suppress_stack1,
|
|
const ReportStack *suppress_stack2,
|
|
const ReportLocation *suppress_loc) {
|
|
atomic_store(&ctx->last_symbolize_time_ns, NanoTime(), memory_order_relaxed);
|
|
const ReportDesc *rep = srep.GetReport();
|
|
Suppression *supp = 0;
|
|
uptr suppress_pc = IsSuppressed(rep->typ, suppress_stack1, &supp);
|
|
if (suppress_pc == 0)
|
|
suppress_pc = IsSuppressed(rep->typ, suppress_stack2, &supp);
|
|
if (suppress_pc == 0)
|
|
suppress_pc = IsSuppressed(rep->typ, suppress_loc, &supp);
|
|
if (suppress_pc != 0) {
|
|
FiredSuppression s = {srep.GetReport()->typ, suppress_pc, supp};
|
|
ctx->fired_suppressions.push_back(s);
|
|
}
|
|
if (OnReport(rep, suppress_pc != 0))
|
|
return false;
|
|
PrintReport(rep);
|
|
ctx->nreported++;
|
|
if (flags()->halt_on_error)
|
|
internal__exit(flags()->exitcode);
|
|
return true;
|
|
}
|
|
|
|
bool IsFiredSuppression(Context *ctx,
|
|
const ScopedReport &srep,
|
|
const StackTrace &trace) {
|
|
for (uptr k = 0; k < ctx->fired_suppressions.size(); k++) {
|
|
if (ctx->fired_suppressions[k].type != srep.GetReport()->typ)
|
|
continue;
|
|
for (uptr j = 0; j < trace.Size(); j++) {
|
|
FiredSuppression *s = &ctx->fired_suppressions[k];
|
|
if (trace.Get(j) == s->pc) {
|
|
if (s->supp)
|
|
s->supp->hit_count++;
|
|
return true;
|
|
}
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
static bool IsFiredSuppression(Context *ctx,
|
|
const ScopedReport &srep,
|
|
uptr addr) {
|
|
for (uptr k = 0; k < ctx->fired_suppressions.size(); k++) {
|
|
if (ctx->fired_suppressions[k].type != srep.GetReport()->typ)
|
|
continue;
|
|
FiredSuppression *s = &ctx->fired_suppressions[k];
|
|
if (addr == s->pc) {
|
|
if (s->supp)
|
|
s->supp->hit_count++;
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool FrameIsInternal(const ReportStack *frame) {
|
|
return frame != 0 && frame->file != 0
|
|
&& (internal_strstr(frame->file, "tsan_interceptors.cc") ||
|
|
internal_strstr(frame->file, "sanitizer_common_interceptors.inc") ||
|
|
internal_strstr(frame->file, "tsan_interface_"));
|
|
}
|
|
|
|
// On programs that use Java we see weird reports like:
|
|
// WARNING: ThreadSanitizer: data race (pid=22512)
|
|
// Read of size 8 at 0x7d2b00084318 by thread 100:
|
|
// #0 memcpy tsan_interceptors.cc:406 (foo+0x00000d8dfae3)
|
|
// #1 <null> <null>:0 (0x7f7ad9b40193)
|
|
// Previous write of size 8 at 0x7d2b00084318 by thread 105:
|
|
// #0 strncpy tsan_interceptors.cc:501 (foo+0x00000d8e0919)
|
|
// #1 <null> <null>:0 (0x7f7ad9b42707)
|
|
static bool IsJavaNonsense(const ReportDesc *rep) {
|
|
#ifndef TSAN_GO
|
|
for (uptr i = 0; i < rep->mops.Size(); i++) {
|
|
ReportMop *mop = rep->mops[i];
|
|
ReportStack *frame = mop->stack;
|
|
if (frame == 0
|
|
|| (frame->func == 0 && frame->file == 0 && frame->line == 0
|
|
&& frame->module == 0)) {
|
|
return true;
|
|
}
|
|
if (FrameIsInternal(frame)) {
|
|
frame = frame->next;
|
|
if (frame == 0
|
|
|| (frame->func == 0 && frame->file == 0 && frame->line == 0
|
|
&& frame->module == 0)) {
|
|
if (frame) {
|
|
FiredSuppression supp = {rep->typ, frame->pc, 0};
|
|
CTX()->fired_suppressions.push_back(supp);
|
|
}
|
|
return true;
|
|
}
|
|
}
|
|
}
|
|
#endif
|
|
return false;
|
|
}
|
|
|
|
static bool RaceBetweenAtomicAndFree(ThreadState *thr) {
|
|
Shadow s0(thr->racy_state[0]);
|
|
Shadow s1(thr->racy_state[1]);
|
|
CHECK(!(s0.IsAtomic() && s1.IsAtomic()));
|
|
if (!s0.IsAtomic() && !s1.IsAtomic())
|
|
return true;
|
|
if (s0.IsAtomic() && s1.IsFreed())
|
|
return true;
|
|
if (s1.IsAtomic() && thr->is_freeing)
|
|
return true;
|
|
return false;
|
|
}
|
|
|
|
void ReportRace(ThreadState *thr) {
|
|
if (!flags()->report_bugs)
|
|
return;
|
|
ScopedInRtl in_rtl;
|
|
|
|
if (!flags()->report_atomic_races && !RaceBetweenAtomicAndFree(thr))
|
|
return;
|
|
|
|
bool freed = false;
|
|
{
|
|
Shadow s(thr->racy_state[1]);
|
|
freed = s.GetFreedAndReset();
|
|
thr->racy_state[1] = s.raw();
|
|
}
|
|
|
|
uptr addr = ShadowToMem((uptr)thr->racy_shadow_addr);
|
|
uptr addr_min = 0;
|
|
uptr addr_max = 0;
|
|
{
|
|
uptr a0 = addr + Shadow(thr->racy_state[0]).addr0();
|
|
uptr a1 = addr + Shadow(thr->racy_state[1]).addr0();
|
|
uptr e0 = a0 + Shadow(thr->racy_state[0]).size();
|
|
uptr e1 = a1 + Shadow(thr->racy_state[1]).size();
|
|
addr_min = min(a0, a1);
|
|
addr_max = max(e0, e1);
|
|
if (IsExpectedReport(addr_min, addr_max - addr_min))
|
|
return;
|
|
}
|
|
|
|
Context *ctx = CTX();
|
|
ThreadRegistryLock l0(ctx->thread_registry);
|
|
|
|
ReportType typ = ReportTypeRace;
|
|
if (thr->is_vptr_access)
|
|
typ = ReportTypeVptrRace;
|
|
else if (freed)
|
|
typ = ReportTypeUseAfterFree;
|
|
ScopedReport rep(typ);
|
|
if (IsFiredSuppression(ctx, rep, addr))
|
|
return;
|
|
const uptr kMop = 2;
|
|
StackTrace traces[kMop];
|
|
const uptr toppc = TraceTopPC(thr);
|
|
traces[0].ObtainCurrent(thr, toppc);
|
|
if (IsFiredSuppression(ctx, rep, traces[0]))
|
|
return;
|
|
InternalScopedBuffer<MutexSet> mset2(1);
|
|
new(mset2.data()) MutexSet();
|
|
Shadow s2(thr->racy_state[1]);
|
|
RestoreStack(s2.tid(), s2.epoch(), &traces[1], mset2.data());
|
|
if (IsFiredSuppression(ctx, rep, traces[1]))
|
|
return;
|
|
|
|
if (HandleRacyStacks(thr, traces, addr_min, addr_max))
|
|
return;
|
|
|
|
for (uptr i = 0; i < kMop; i++) {
|
|
Shadow s(thr->racy_state[i]);
|
|
rep.AddMemoryAccess(addr, s, &traces[i],
|
|
i == 0 ? &thr->mset : mset2.data());
|
|
}
|
|
|
|
if (flags()->suppress_java && IsJavaNonsense(rep.GetReport()))
|
|
return;
|
|
|
|
for (uptr i = 0; i < kMop; i++) {
|
|
FastState s(thr->racy_state[i]);
|
|
ThreadContext *tctx = static_cast<ThreadContext*>(
|
|
ctx->thread_registry->GetThreadLocked(s.tid()));
|
|
if (s.epoch() < tctx->epoch0 || s.epoch() > tctx->epoch1)
|
|
continue;
|
|
rep.AddThread(tctx);
|
|
}
|
|
|
|
rep.AddLocation(addr_min, addr_max - addr_min);
|
|
|
|
#ifndef TSAN_GO
|
|
{ // NOLINT
|
|
Shadow s(thr->racy_state[1]);
|
|
if (s.epoch() <= thr->last_sleep_clock.get(s.tid()))
|
|
rep.AddSleep(thr->last_sleep_stack_id);
|
|
}
|
|
#endif
|
|
|
|
ReportLocation *suppress_loc = rep.GetReport()->locs.Size() ?
|
|
rep.GetReport()->locs[0] : 0;
|
|
if (!OutputReport(ctx, rep, rep.GetReport()->mops[0]->stack,
|
|
rep.GetReport()->mops[1]->stack,
|
|
suppress_loc))
|
|
return;
|
|
|
|
AddRacyStacks(thr, traces, addr_min, addr_max);
|
|
}
|
|
|
|
void PrintCurrentStack(ThreadState *thr, uptr pc) {
|
|
StackTrace trace;
|
|
trace.ObtainCurrent(thr, pc);
|
|
PrintStack(SymbolizeStack(trace));
|
|
}
|
|
|
|
void PrintCurrentStackSlow() {
|
|
#ifndef TSAN_GO
|
|
__sanitizer::StackTrace *ptrace = new(internal_alloc(MBlockStackTrace,
|
|
sizeof(__sanitizer::StackTrace))) __sanitizer::StackTrace;
|
|
ptrace->SlowUnwindStack(__sanitizer::StackTrace::GetCurrentPc(),
|
|
kStackTraceMax);
|
|
for (uptr i = 0; i < ptrace->size / 2; i++) {
|
|
uptr tmp = ptrace->trace[i];
|
|
ptrace->trace[i] = ptrace->trace[ptrace->size - i - 1];
|
|
ptrace->trace[ptrace->size - i - 1] = tmp;
|
|
}
|
|
StackTrace trace;
|
|
trace.Init(ptrace->trace, ptrace->size);
|
|
PrintStack(SymbolizeStack(trace));
|
|
#endif
|
|
}
|
|
|
|
} // namespace __tsan
|