https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79200
Bug ID: 79200
Summary: Race-Condition in Address Santitizer
Product: gcc
Version: 5.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: sanitizer
Assignee: unassigned at gcc dot gnu.org
Reporter: tommapson at gmx 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
Target Milestone: ---
Multiple concurrent executables hang when being built by gcc-6.3.0 (as well as
gcc-5.3.0) with -fsanitize=address.
To reproduce this bug, you may use the following trivial C program:
----- main.c ----
int main(int ac, char** av)
{
return 0;
}
-----
Compile with
gcc -fsanitize=address main.c -o main
Run multiple instances concurrently (bash on Debian Wheezy or Jessie):
for i in $(seq 20000) ; do ( ./main >/dev/null 2>&1 & ) ; done ; echo
"SLEEPING..." ; sleep 120
Some of the executables hang as can be seen using ps or top. The processes are
reported to have state "T" (stopped, either by a job control signal or because
it is being traced).
If compiled without -fsanitize=address, the above loop does not cause any of
the processes to hang.
