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| //===-- tsan_go.cpp -------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// 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;
}
void *internal_alloc(MBlockType typ, uptr sz) {
return InternalAlloc(sz);
}
void internal_free(void *p) {
InternalFree(p);
}
// Callback into Go.
static void (*go_runtime_cb)(uptr cmd, void *ctx);
enum {
CallbackGetProc = 0,
CallbackSymbolizeCode = 1,
CallbackSymbolizeData = 2,
};
struct SymbolizeCodeContext {
uptr pc;
char *func;
char *file;
uptr line;
uptr off;
uptr res;
};
SymbolizedStack *SymbolizeCode(uptr addr) {
SymbolizedStack *first = SymbolizedStack::New(addr);
SymbolizedStack *s = first;
for (;;) {
SymbolizeCodeContext cbctx;
internal_memset(&cbctx, 0, sizeof(cbctx));
cbctx.pc = addr;
go_runtime_cb(CallbackSymbolizeCode, &cbctx);
if (cbctx.res == 0)
break;
AddressInfo &info = s->info;
info.module_offset = cbctx.off;
info.function = internal_strdup(cbctx.func ? cbctx.func : "??");
info.file = internal_strdup(cbctx.file ? cbctx.file : "-");
info.line = cbctx.line;
info.column = 0;
if (cbctx.pc == addr) // outermost (non-inlined) function
break;
addr = cbctx.pc;
// Allocate a stack entry for the parent of the inlined function.
SymbolizedStack *s2 = SymbolizedStack::New(addr);
s->next = s2;
s = s2;
}
return first;
}
struct SymbolizeDataContext {
uptr addr;
uptr heap;
uptr start;
uptr size;
char *name;
char *file;
uptr line;
uptr res;
};
ReportLocation *SymbolizeData(uptr addr) {
SymbolizeDataContext cbctx;
internal_memset(&cbctx, 0, sizeof(cbctx));
cbctx.addr = addr;
go_runtime_cb(CallbackSymbolizeData, &cbctx);
if (!cbctx.res)
return 0;
if (cbctx.heap) {
MBlock *b = ctx->metamap.GetBlock(cbctx.start);
if (!b)
return 0;
ReportLocation *loc = ReportLocation::New(ReportLocationHeap);
loc->heap_chunk_start = cbctx.start;
loc->heap_chunk_size = b->siz;
loc->tid = b->tid;
loc->stack = SymbolizeStackId(b->stk);
return loc;
} else {
ReportLocation *loc = ReportLocation::New(ReportLocationGlobal);
loc->global.name = internal_strdup(cbctx.name ? cbctx.name : "??");
loc->global.file = internal_strdup(cbctx.file ? cbctx.file : "??");
loc->global.line = cbctx.line;
loc->global.start = cbctx.start;
loc->global.size = cbctx.size;
return loc;
}
}
static ThreadState *main_thr;
static bool inited;
static Processor* get_cur_proc() {
if (UNLIKELY(!inited)) {
// Running Initialize().
// We have not yet returned the Processor to Go, so we cannot ask it back.
// Currently, Initialize() does not use the Processor, so return nullptr.
return nullptr;
}
Processor *proc;
go_runtime_cb(CallbackGetProc, &proc);
return proc;
}
Processor *ThreadState::proc() {
return get_cur_proc();
}
extern "C" {
static ThreadState *AllocGoroutine() {
ThreadState *thr = (ThreadState*)internal_alloc(MBlockThreadContex,
sizeof(ThreadState));
internal_memset(thr, 0, sizeof(*thr));
return thr;
}
void __tsan_init(ThreadState **thrp, Processor **procp,
void (*cb)(uptr cmd, void *cb)) {
go_runtime_cb = cb;
ThreadState *thr = AllocGoroutine();
main_thr = *thrp = thr;
Initialize(thr);
*procp = thr->proc1;
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(ThreadState *thr, uptr pc, uptr p, uptr sz) {
CHECK(inited);
if (thr && pc)
ctx->metamap.AllocBlock(thr, pc, p, sz);
MemoryResetRange(0, 0, (uptr)p, sz);
}
void __tsan_free(uptr p, uptr sz) {
ctx->metamap.FreeRange(get_cur_proc(), 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, ThreadType::Regular);
}
void __tsan_go_end(ThreadState *thr) {
ThreadFinish(thr);
internal_free(thr);
}
void __tsan_proc_create(Processor **pproc) {
*pproc = ProcCreate();
}
void __tsan_proc_destroy(Processor *proc) {
ProcDestroy(proc);
}
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) {
if (write)
MutexPreLock(thr, 0, addr);
else
MutexPreReadLock(thr, 0, addr);
}
void __tsan_mutex_after_lock(ThreadState *thr, uptr addr, uptr write) {
if (write)
MutexPostLock(thr, 0, addr);
else
MutexPostReadLock(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);
}
void __tsan_report_count(u64 *pn) {
Lock lock(&ctx->report_mtx);
*pn = ctx->nreported;
}
} // extern "C"
} // namespace __tsan
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