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fix process attach

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first attach all threads of a process and than set the breakpoints.
This commit is contained in:
Stefani Seibold 2015-04-28 17:48:15 +02:00
parent 0259e186ab
commit fc303d05be
1 changed files with 19 additions and 16 deletions
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35
task.c
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@ -131,7 +131,6 @@ static int leader_setup(struct task *leader)
return backtrace_init(leader); return backtrace_init(leader);
} }
static int task_init(struct task *task, int attached) static int task_init(struct task *task, int attached)
{ {
pid_t tgid; pid_t tgid;
@ -400,9 +399,10 @@ static void show_attached(struct task *task, void *data)
fprintf(options.output, "+++ process pid=%d attached (%s) +++\n", task->pid, library_execname(task->leader)); fprintf(options.output, "+++ process pid=%d attached (%s) +++\n", task->pid, library_execname(task->leader));
} }
void open_pid(pid_t pid) void open_pid(pid_t pid)
{ {
struct task *task; struct task *leader;
debug(DEBUG_PROCESS, "pid=%d", pid); debug(DEBUG_PROCESS, "pid=%d", pid);
@ -412,11 +412,8 @@ void open_pid(pid_t pid)
return; return;
/* First, see if we can attach the requested PID itself. */ /* First, see if we can attach the requested PID itself. */
task = open_one_pid(pid); leader = open_one_pid(pid);
if (!task) if (!leader)
goto fail2;
if (leader_setup(task) < 0)
goto fail2; goto fail2;
/* Now attach to all tasks that belong to that PID. There's a /* Now attach to all tasks that belong to that PID. There's a
@ -437,18 +434,20 @@ void open_pid(pid_t pid)
size_t i; size_t i;
if (process_tasks(pid, &tasks, &ntasks) < 0) { if (process_tasks(pid, &tasks, &ntasks) < 0) {
fprintf(stderr, "Cannot obtain tasks of pid %u: %s\n", pid, strerror(errno)); fprintf(stderr, "Cannot obtain tasks of pid %d: %s\n", pid, strerror(errno));
goto fail1; goto fail1;
} }
have_all = 1; have_all = 1;
for (i = 0; i < ntasks; ++i) { for (i = 0; i < ntasks; ++i) {
if (!pid2task(tasks[i])) { if (!pid2task(tasks[i])) {
struct task *child = open_one_pid(tasks[i]); struct task *task = open_one_pid(tasks[i]);
if (child) { if (task) {
if (task_clone(child->leader, child) < 0) if (backtrace_init(task) < 0) {
goto fail2; fprintf(stderr, "Cannot init backtrace for pid %d: %s\n", pid, strerror(errno));
goto fail1;
}
} }
have_all = 0; have_all = 0;
@ -462,14 +461,18 @@ void open_pid(pid_t pid)
old_ntasks = ntasks; old_ntasks = ntasks;
} }
if (leader_setup(leader) < 0)
goto fail1;
if (options.verbose) if (options.verbose)
each_task(task, &show_attached, NULL); each_task(leader, &show_attached, NULL);
return; return;
fail2: fail2:
fprintf(stderr, "Cannot attach to pid %u: %s\n", pid, strerror(errno)); fprintf(stderr, "Cannot attach to pid %d: %s\n", pid, strerror(errno));
fail1: fail1:
if (task) if (leader)
remove_proc(task); remove_proc(leader);
} }
struct task *get_first_process(void) struct task *get_first_process(void)