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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 {
const int kMaxGoroutinesEver = 128*1024;
static ThreadState *goroutines[kMaxGoroutinesEver];
void InitializeInterceptors() {
}
void InitializeDynamicAnnotations() {
}
bool IsExpectedReport(uptr addr, uptr size) {
return false;
}
void internal_start_thread(void(*func)(void*), void *arg) {
}
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);
}
// Callback into Go.
extern "C" int __tsan_symbolize(uptr pc, char **func, char **file,
int *line, int *off);
ReportStack *SymbolizeCode(uptr addr) {
ReportStack *s = (ReportStack*)internal_alloc(MBlockReportStack,
sizeof(ReportStack));
internal_memset(s, 0, sizeof(*s));
s->pc = addr;
char *func = 0, *file = 0;
int line = 0, off = 0;
if (__tsan_symbolize(addr, &func, &file, &line, &off)) {
s->offset = off;
s->func = internal_strdup(func ? func : "??");
s->file = internal_strdup(file ? file : "-");
s->line = line;
s->col = 0;
free(func);
free(file);
}
return s;
}
extern "C" {
static void AllocGoroutine(int tid) {
if (tid >= kMaxGoroutinesEver) {
Printf("FATAL: Reached goroutine limit\n");
Die();
}
ThreadState *thr = (ThreadState*)internal_alloc(MBlockThreadContex,
sizeof(ThreadState));
internal_memset(thr, 0, sizeof(*thr));
goroutines[tid] = thr;
}
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_read(int goid, void *addr, void *pc) {
ThreadState *thr = goroutines[goid];
MemoryAccess(thr, (uptr)pc, (uptr)addr, 0, false);
}
void __tsan_write(int goid, void *addr, void *pc) {
ThreadState *thr = goroutines[goid];
MemoryAccess(thr, (uptr)pc, (uptr)addr, 0, true);
}
void __tsan_func_enter(int goid, void *pc) {
ThreadState *thr = goroutines[goid];
FuncEntry(thr, (uptr)pc);
}
void __tsan_func_exit(int goid) {
ThreadState *thr = goroutines[goid];
FuncExit(thr);
}
void __tsan_malloc(int goid, void *p, uptr sz, void *pc) {
ThreadState *thr = goroutines[goid];
if (thr == 0) // probably before __tsan_init()
return;
thr->in_rtl++;
MemoryResetRange(thr, (uptr)pc, (uptr)p, sz);
MemoryAccessRange(thr, (uptr)pc, (uptr)p, sz, true);
thr->in_rtl--;
}
void __tsan_free(void *p) {
(void)p;
}
void __tsan_go_start(int pgoid, int chgoid, void *pc) {
if (chgoid == 0)
return;
AllocGoroutine(chgoid);
ThreadState *thr = goroutines[chgoid];
ThreadState *parent = goroutines[pgoid];
thr->in_rtl++;
parent->in_rtl++;
int goid2 = ThreadCreate(parent, (uptr)pc, 0, true);
ThreadStart(thr, goid2, 0);
parent->in_rtl--;
thr->in_rtl--;
}
void __tsan_go_end(int goid) {
ThreadState *thr = goroutines[goid];
thr->in_rtl++;
ThreadFinish(thr);
thr->in_rtl--;
internal_free(thr);
goroutines[goid] = 0;
}
void __tsan_acquire(int goid, void *addr) {
ThreadState *thr = goroutines[goid];
thr->in_rtl++;
Acquire(thr, 0, (uptr)addr);
thr->in_rtl--;
}
void __tsan_release(int goid, void *addr) {
ThreadState *thr = goroutines[goid];
thr->in_rtl++;
ReleaseStore(thr, 0, (uptr)addr);
thr->in_rtl--;
}
void __tsan_release_merge(int goid, void *addr) {
ThreadState *thr = goroutines[goid];
thr->in_rtl++;
Release(thr, 0, (uptr)addr);
thr->in_rtl--;
}
void __tsan_finalizer_goroutine(int goid) {
ThreadState *thr = goroutines[goid];
ThreadFinalizerGoroutine(thr);
}
#ifdef _WIN32
// MinGW gcc emits calls to the function.
void ___chkstk_ms(void) {
// The implementation must be along the lines of:
// .code64
// PUBLIC ___chkstk_ms
// //cfi_startproc()
// ___chkstk_ms:
// push rcx
// //cfi_push(%rcx)
// push rax
// //cfi_push(%rax)
// cmp rax, PAGE_SIZE
// lea rcx, [rsp + 24]
// jb l_LessThanAPage
// .l_MoreThanAPage:
// sub rcx, PAGE_SIZE
// or rcx, 0
// sub rax, PAGE_SIZE
// cmp rax, PAGE_SIZE
// ja l_MoreThanAPage
// .l_LessThanAPage:
// sub rcx, rax
// or [rcx], 0
// pop rax
// //cfi_pop(%rax)
// pop rcx
// //cfi_pop(%rcx)
// ret
// //cfi_endproc()
// END
}
#endif
} // extern "C"
} // namespace __tsan
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