https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64336
Bug ID: 64336
Summary: Template functions are not instrumented at -O0 and -Og
Product: gcc
Version: 5.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: sanitizer
Assignee: unassigned at gcc dot gnu.org
Reporter: bernd.edlinger at hotmail dot de
CC: dodji at gcc dot gnu.org, dvyukov at gcc dot gnu.org,
jakub at gcc dot gnu.org, kcc at gcc dot gnu.org
I noticed that all template functions/classes do not emit any
tsan warnings at -O0 and -Og, only for -O1/-O2/-O3.
That happens because these are not insrumented at all.
cat test.cpp
#include <pthread.h>
template <class x>
void
foo (x &val)
{
val++;
}
int v;
void *
tf (void *)
{
foo (v);
return NULL;
}
int
main ()
{
pthread_t th;
if (pthread_create (&th, NULL, tf, NULL))
return 0;
foo (v);
pthread_join (th, NULL);
return 0;
}
//EOF
g++ -g -fsanitize=thread test.cpp
./a.out #prints nothing.
this is what is generated for foo<int>
_Z3fooIiEvRT_:
.LFB12:
.cfi_startproc
pushq %rbp
.cfi_def_cfa_offset 16
.cfi_offset 6, -16
movq %rsp, %rbp
.cfi_def_cfa_register 6
movq %rdi, -8(%rbp)
movq -8(%rbp), %rax
movl (%rax), %eax
leal 1(%rax), %edx
movq -8(%rbp), %rax
movl %edx, (%rax)
nop
popq %rbp
.cfi_def_cfa 7, 8
ret
.cfi_endproc
