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[tsan] Fix false positive on xdr*_create. 

llvm-svn: 206030
This commit is contained in:
Evgeniy Stepanov 2014-04-11 12:29:24 +00:00
parent 1fcbe675fa
commit 652cbd7c15
2 changed files with 23 additions and 2 deletions
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4
compiler-rt/lib/sanitizer_common/sanitizer_common_interceptors.inc
View File

@ -3714,7 +3714,7 @@ INTERCEPTOR(void, xdrmem_create, __sanitizer_XDR *xdrs, uptr addr,
COMMON_INTERCEPTOR_ENTER(ctx, xdrmem_create, xdrs, addr, size, op);
REAL(xdrmem_create)(xdrs, addr, size, op);
COMMON_INTERCEPTOR_WRITE_RANGE(ctx, xdrs, sizeof(*xdrs));
COMMON_INTERCEPTOR_WRITE_RANGE(ctx, xdrs->x_ops, sizeof(*xdrs->x_ops));
COMMON_INTERCEPTOR_INITIALIZE_RANGE(xdrs->x_ops, sizeof(*xdrs->x_ops));
if (op == __sanitizer_XDR_ENCODE) {
// It's not obvious how much data individual xdr_ routines write.
// Simply unpoison the entire target buffer in advance.
@ -3727,7 +3727,7 @@ INTERCEPTOR(void, xdrstdio_create, __sanitizer_XDR *xdrs, void *file, int op) {
COMMON_INTERCEPTOR_ENTER(ctx, xdrstdio_create, xdrs, file, op);
REAL(xdrstdio_create)(xdrs, file, op);
COMMON_INTERCEPTOR_WRITE_RANGE(ctx, xdrs, sizeof(*xdrs));
COMMON_INTERCEPTOR_WRITE_RANGE(ctx, xdrs->x_ops, sizeof(*xdrs->x_ops));
COMMON_INTERCEPTOR_INITIALIZE_RANGE(xdrs->x_ops, sizeof(*xdrs->x_ops));
}
#define XDR_INTERCEPTOR(F, T) \

21
compiler-rt/test/tsan/sunrpc.cc Normal file
View File

@ -0,0 +1,21 @@
// RUN: %clang_tsan -O1 %s -o %t && %t
#include <pthread.h>
#include <rpc/xdr.h>
void *thr(void *p) {
XDR xdrs;
char buf[100];
xdrmem_create(&xdrs, buf, sizeof(buf), XDR_ENCODE);
xdr_destroy(&xdrs);
return 0;
}
int main(int argc, char *argv[]) {
pthread_t th[2];
pthread_create(&th[0], 0, thr, 0);
pthread_create(&th[1], 0, thr, 0);
pthread_join(th[0], 0);
pthread_join(th[1], 0);
return 0;
}