llvm-project/compiler-rt/lib/tsan/go/tsan_go.cc

227 lines
6.3 KiB
C++

//===-- 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 {
struct ThreadStatePlaceholder {
uptr opaque[sizeof(ThreadState) / sizeof(uptr) + kCacheLineSize];
};
static ThreadState *goroutines[kMaxTid];
void InitializeInterceptors() {
}
void InitializeDynamicAnnotations() {
}
bool IsExpectedReport(uptr addr, uptr size) {
return false;
}
void internal_start_thread(void(*func)(void*), void *arg) {
}
extern "C" int goCallbackCommentPc(uptr pc, char **img, char **rtn,
char **filename, int *lineno);
extern "C" void free(void *p);
ReportStack *SymbolizeCode(uptr addr) {
ReportStack *s = NewReportStackEntry(addr);
char *img, *rtn, *filename;
int lineno;
if (goCallbackCommentPc(addr, &img, &rtn, &filename, &lineno)) {
s->module = internal_strdup(img);
s->offset = addr;
s->func = internal_strdup(rtn);
s->file = internal_strdup(filename);
s->line = lineno;
s->col = 0;
free(img);
free(rtn);
free(filename);
}
return s;
}
ReportStack *SymbolizeData(uptr addr) {
return 0;
}
ReportStack *NewReportStackEntry(uptr addr) {
ReportStack *ent = (ReportStack*)internal_alloc(MBlockReportStack,
sizeof(ReportStack));
internal_memset(ent, 0, sizeof(*ent));
ent->pc = addr;
return ent;
}
void *internal_alloc(MBlockType typ, uptr sz) {
return InternalAlloc(sz);
}
void internal_free(void *p) {
InternalFree(p);
}
extern "C" {
enum Tsan1EventType {
NOOP, // Should not appear.
READ, // {tid, pc, addr, size}
WRITE, // {tid, pc, addr, size}
READER_LOCK, // {tid, pc, lock, 0}
WRITER_LOCK, // {tid, pc, lock, 0}
UNLOCK, // {tid, pc, lock, 0}
UNLOCK_OR_INIT, // {tid, pc, lock, 0}
LOCK_CREATE, // {tid, pc, lock, 0}
LOCK_DESTROY, // {tid, pc, lock, 0}
THR_CREATE_BEFORE, // Parent thread's event. {tid, pc, 0, 0}
THR_CREATE_AFTER, // Parent thread's event. {tid, 0, 0, child_tid}/* 10 */
THR_START, // Child thread's event {tid, CallStack, 0, parent_tid}
THR_FIRST_INSN, // Used only by valgrind.
THR_END, // {tid, 0, 0, 0}
THR_JOIN_AFTER, // {tid, pc, joined_tid}
THR_STACK_TOP, // {tid, pc, stack_top, stack_size_if_known}
RTN_EXIT, // {tid, 0, 0, 0}
RTN_CALL, // {tid, pc, 0, 0}
SBLOCK_ENTER, // {tid, pc, 0, 0}
SIGNAL, // {tid, pc, obj, 0}
WAIT, // {tid, pc, obj, 0} /* 20 */
CYCLIC_BARRIER_INIT, // {tid, pc, obj, n}
CYCLIC_BARRIER_WAIT_BEFORE, // {tid, pc, obj, 0}
CYCLIC_BARRIER_WAIT_AFTER, // {tid, pc, obj, 0}
PCQ_CREATE, // {tid, pc, pcq_addr, 0}
PCQ_DESTROY, // {tid, pc, pcq_addr, 0}
PCQ_PUT, // {tid, pc, pcq_addr, 0}
PCQ_GET, // {tid, pc, pcq_addr, 0}
STACK_MEM_DIE, // deprecated.
MALLOC, // {tid, pc, addr, size}
FREE, // {tid, pc, addr, 0} /* 30 */
MMAP, // {tid, pc, addr, size}
MUNMAP, // {tid, pc, addr, size}
PUBLISH_RANGE, // may be deprecated later.
UNPUBLISH_RANGE, // deprecated. TODO(kcc): get rid of this.
HB_LOCK, // {tid, pc, addr, 0}
NON_HB_LOCK, // {tid, pc, addr, 0}
IGNORE_READS_BEG, // {tid, pc, 0, 0}
IGNORE_READS_END, // {tid, pc, 0, 0}
IGNORE_WRITES_BEG, // {tid, pc, 0, 0}
IGNORE_WRITES_END, // {tid, pc, 0, 0}
SET_THREAD_NAME, // {tid, pc, name_str, 0}
SET_LOCK_NAME, // {tid, pc, lock, lock_name_str}
TRACE_MEM, // {tid, pc, addr, 0}
EXPECT_RACE, // {tid, descr_str, ptr, size}
BENIGN_RACE, // {tid, descr_str, ptr, size}
EXPECT_RACE_BEGIN, // {tid, pc, 0, 0}
EXPECT_RACE_END, // {tid, pc, 0, 0}
VERBOSITY, // Used for debugging.
STACK_TRACE, // {tid, pc, 0, 0}, for debugging.
FLUSH_STATE, // {tid, pc, 0, 0}
PC_DESCRIPTION, // {0, pc, descr_str, 0}, for ts_offline.
PRINT_MESSAGE, // {tid, pc, message_str, 0}, for ts_offline.
FLUSH_EXPECTED_RACES, // {0, 0, 0, 0}
LAST_EVENT // Should not appear.
};
static void AllocGoroutine(int tid) {
goroutines[tid] = (ThreadState*)internal_alloc(MBlockThreadContex,
sizeof(ThreadState));
internal_memset(goroutines[tid], 0, sizeof(ThreadState));
}
void __tsan_init() {
AllocGoroutine(0);
ThreadState *thr = goroutines[0];
thr->in_rtl++;
Initialize(thr);
thr->in_rtl--;
}
void __tsan_fini() {
// FIXME: Not necessary thread 0.
ThreadState *thr = goroutines[0];
thr->in_rtl++;
int res = Finalize(thr);
thr->in_rtl--;
exit(res);
}
void __tsan_event(int typ, int tid, void *pc, void *addr, int info) {
ThreadState *thr = goroutines[tid];
switch (typ) {
case READ:
MemoryAccess(thr, (uptr)pc, (uptr)addr, 0, false);
break;
case WRITE:
MemoryAccess(thr, (uptr)pc, (uptr)addr, 0, true);
break;
case RTN_EXIT:
FuncExit(thr);
break;
case RTN_CALL:
FuncEntry(thr, (uptr)pc);
break;
case SBLOCK_ENTER:
break;
case SIGNAL:
thr->in_rtl++;
Release(thr, (uptr)pc, (uptr)addr);
thr->in_rtl--;
break;
case WAIT:
thr->in_rtl++;
Acquire(thr, (uptr)pc, (uptr)addr);
thr->in_rtl--;
break;
case MALLOC:
thr->in_rtl++;
MemoryResetRange(thr, (uptr)pc, (uptr)addr, (uptr)info);
thr->in_rtl--;
break;
case FREE:
break;
case THR_START: {
if (tid == 0)
return;
ThreadState *parent = goroutines[info];
AllocGoroutine(tid);
thr = goroutines[tid];
thr->in_rtl++;
parent->in_rtl++;
int tid2 = ThreadCreate(parent, (uptr)pc, 0, true);
ThreadStart(thr, tid2);
parent->in_rtl--;
thr->in_rtl--;
break;
}
case THR_END: {
thr->in_rtl++;
ThreadFinish(thr);
thr->in_rtl--;
break;
}
default:
Printf("Unknown event type %d\n", typ);
Die();
}
}
} // extern "C"
} // namespace __tsan