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//===-- tsan_go.cc --------------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// ThreadSanitizer runtime for Go language.
//
//===----------------------------------------------------------------------===//
#include "tsan_rtl.h"
#include "tsan_symbolize.h"
#include "sanitizer_common/sanitizer_common.h"
#include <stdlib.h>
namespace __tsan {
void InitializeInterceptors() {
}
void InitializeDynamicAnnotations() {
}
bool IsExpectedReport(uptr addr, uptr size) {
return false;
}
ReportLocation *SymbolizeData(uptr addr) {
return 0;
}
void *internal_alloc(MBlockType typ, uptr sz) {
return InternalAlloc(sz);
}
void internal_free(void *p) {
InternalFree(p);
}
struct SymbolizeContext {
uptr pc;
char *func;
char *file;
uptr line;
uptr off;
uptr res;
};
// Callback into Go.
static void (*symbolize_cb)(SymbolizeContext *ctx);
SymbolizedStack *SymbolizeCode(uptr addr) {
SymbolizedStack *s = SymbolizedStack::New(addr);
SymbolizeContext ctx;
internal_memset(&ctx, 0, sizeof(ctx));
ctx.pc = addr;
symbolize_cb(&ctx);
if (ctx.res) {
AddressInfo &info = s->info;
info.module_offset = ctx.off;
info.function = internal_strdup(ctx.func ? ctx.func : "??");
info.file = internal_strdup(ctx.file ? ctx.file : "-");
info.line = ctx.line;
info.column = 0;
}
return s;
}
extern "C" {
static ThreadState *main_thr;
static bool inited;
static ThreadState *AllocGoroutine() {
ThreadState *thr = (ThreadState*)internal_alloc(MBlockThreadContex,
sizeof(ThreadState));
internal_memset(thr, 0, sizeof(*thr));
return thr;
}
void __tsan_init(ThreadState **thrp, void (*cb)(SymbolizeContext *cb)) {
symbolize_cb = cb;
ThreadState *thr = AllocGoroutine();
main_thr = *thrp = thr;
Initialize(thr);
inited = true;
}
void __tsan_fini() {
// FIXME: Not necessary thread 0.
ThreadState *thr = main_thr;
int res = Finalize(thr);
exit(res);
}
void __tsan_map_shadow(uptr addr, uptr size) {
MapShadow(addr, size);
}
void __tsan_read(ThreadState *thr, void *addr, void *pc) {
MemoryRead(thr, (uptr)pc, (uptr)addr, kSizeLog1);
}
void __tsan_read_pc(ThreadState *thr, void *addr, uptr callpc, uptr pc) {
if (callpc != 0)
FuncEntry(thr, callpc);
MemoryRead(thr, (uptr)pc, (uptr)addr, kSizeLog1);
if (callpc != 0)
FuncExit(thr);
}
void __tsan_write(ThreadState *thr, void *addr, void *pc) {
MemoryWrite(thr, (uptr)pc, (uptr)addr, kSizeLog1);
}
void __tsan_write_pc(ThreadState *thr, void *addr, uptr callpc, uptr pc) {
if (callpc != 0)
FuncEntry(thr, callpc);
MemoryWrite(thr, (uptr)pc, (uptr)addr, kSizeLog1);
if (callpc != 0)
FuncExit(thr);
}
void __tsan_read_range(ThreadState *thr, void *addr, uptr size, uptr pc) {
MemoryAccessRange(thr, (uptr)pc, (uptr)addr, size, false);
}
void __tsan_write_range(ThreadState *thr, void *addr, uptr size, uptr pc) {
MemoryAccessRange(thr, (uptr)pc, (uptr)addr, size, true);
}
void __tsan_func_enter(ThreadState *thr, void *pc) {
FuncEntry(thr, (uptr)pc);
}
void __tsan_func_exit(ThreadState *thr) {
FuncExit(thr);
}
void __tsan_malloc(void *p, uptr sz) {
if (!inited)
return;
MemoryResetRange(0, 0, (uptr)p, sz);
}
void __tsan_go_start(ThreadState *parent, ThreadState **pthr, void *pc) {
ThreadState *thr = AllocGoroutine();
*pthr = thr;
int goid = ThreadCreate(parent, (uptr)pc, 0, true);
ThreadStart(thr, goid, 0);
}
void __tsan_go_end(ThreadState *thr) {
ThreadFinish(thr);
internal_free(thr);
}
void __tsan_acquire(ThreadState *thr, void *addr) {
Acquire(thr, 0, (uptr)addr);
}
void __tsan_release(ThreadState *thr, void *addr) {
ReleaseStore(thr, 0, (uptr)addr);
}
void __tsan_release_merge(ThreadState *thr, void *addr) {
Release(thr, 0, (uptr)addr);
}
void __tsan_finalizer_goroutine(ThreadState *thr) {
AcquireGlobal(thr, 0);
}
void __tsan_mutex_before_lock(ThreadState *thr, uptr addr, uptr write) {
}
void __tsan_mutex_after_lock(ThreadState *thr, uptr addr, uptr write) {
if (write)
MutexLock(thr, 0, addr);
else
MutexReadLock(thr, 0, addr);
}
void __tsan_mutex_before_unlock(ThreadState *thr, uptr addr, uptr write) {
if (write)
MutexUnlock(thr, 0, addr);
else
MutexReadUnlock(thr, 0, addr);
}
void __tsan_go_ignore_sync_begin(ThreadState *thr) {
ThreadIgnoreSyncBegin(thr, 0);
}
void __tsan_go_ignore_sync_end(ThreadState *thr) {
ThreadIgnoreSyncEnd(thr, 0);
}
} // extern "C"
} // namespace __tsan
namespace __sanitizer {
void SymbolizerPrepareForSandboxing() {
// Nothing to do here for Go.
}
} // namespace __sanitizer
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