Commit bdda7643 authored by Cedric Roux's avatar Cedric Roux

Merge remote-tracking branch 'origin/fixes-T-tracer-2018-w17' into develop_integration_2018_w19

parents f7b3ea03 c14dd7ff
......@@ -88,7 +88,7 @@ static void new_thread(void *(*f)(void *), void *data)
/* defined in local_tracer.c */
void T_local_tracer_main(int remote_port, int wait_for_tracer,
int local_socket);
int local_socket, char *shm_file);
/* We monitor the tracee and the local tracer processes.
* When one dies we forcefully kill the other.
......@@ -113,6 +113,9 @@ void T_init(int remote_port, int wait_for_tracer, int dont_fork)
int s;
int T_shm_fd;
int child1, child2;
char shm_file[128];
sprintf(shm_file, "/%s%d", T_SHM_FILENAME, getpid());
if (socketpair(AF_UNIX, SOCK_STREAM, 0, socket_pair))
{ perror("socketpair"); abort(); }
......@@ -122,7 +125,8 @@ void T_init(int remote_port, int wait_for_tracer, int dont_fork)
child1 = fork(); if (child1 == -1) abort();
if (child1 == 0) {
close(socket_pair[1]);
T_local_tracer_main(remote_port, wait_for_tracer, socket_pair[0]);
T_local_tracer_main(remote_port, wait_for_tracer, socket_pair[0],
shm_file);
exit(0);
}
close(socket_pair[0]);
......@@ -142,13 +146,13 @@ void T_init(int remote_port, int wait_for_tracer, int dont_fork)
T_socket = s;
/* setup shared memory */
T_shm_fd = shm_open(T_SHM_FILENAME, O_RDWR /*| O_SYNC*/, 0666);
shm_unlink(T_SHM_FILENAME);
if (T_shm_fd == -1) { perror(T_SHM_FILENAME); abort(); }
T_shm_fd = shm_open(shm_file, O_RDWR /*| O_SYNC*/, 0666);
shm_unlink(shm_file);
if (T_shm_fd == -1) { perror(shm_file); abort(); }
T_cache = mmap(NULL, T_CACHE_SIZE * sizeof(T_cache_t),
PROT_READ | PROT_WRITE, MAP_SHARED, T_shm_fd, 0);
if (T_cache == NULL)
{ perror(T_SHM_FILENAME); abort(); }
if (T_cache == MAP_FAILED)
{ perror(shm_file); abort(); }
close(T_shm_fd);
new_thread(T_receive_thread, NULL);
......
......@@ -340,17 +340,17 @@ static void wait_message(void)
while (T_local_cache[T_busylist_head].busy == 0) usleep(1000);
}
static void init_shm(void)
static void init_shm(char *shm_file)
{
int i;
int s = shm_open(T_SHM_FILENAME, O_RDWR | O_CREAT /*| O_SYNC*/, 0666);
if (s == -1) { perror(T_SHM_FILENAME); abort(); }
int s = shm_open(shm_file, O_RDWR | O_CREAT /*| O_SYNC*/, 0666);
if (s == -1) { perror(shm_file); abort(); }
if (ftruncate(s, T_CACHE_SIZE * sizeof(T_cache_t)))
{ perror(T_SHM_FILENAME); abort(); }
{ perror(shm_file); abort(); }
T_local_cache = mmap(NULL, T_CACHE_SIZE * sizeof(T_cache_t),
PROT_READ | PROT_WRITE, MAP_SHARED, s, 0);
if (T_local_cache == NULL)
{ perror(T_SHM_FILENAME); abort(); }
if (T_local_cache == MAP_FAILED)
{ perror(shm_file); abort(); }
close(s);
/* let's garbage the memory to catch some potential problems
......@@ -361,7 +361,7 @@ static void init_shm(void)
}
void T_local_tracer_main(int remote_port, int wait_for_tracer,
int local_socket)
int local_socket, char *shm_file)
{
int s;
int port = remote_port;
......@@ -371,7 +371,7 @@ void T_local_tracer_main(int remote_port, int wait_for_tracer,
/* write on a socket fails if the other end is closed and we get SIGPIPE */
if (signal(SIGPIPE, SIG_IGN) == SIG_ERR) abort();
init_shm();
init_shm(shm_file);
s = local_socket;
if (dont_wait) {
......
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