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Added "suspend", "resume" and "drop" commands to kernel debugger.

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It's now possible to debug amok-running user threads by 
suspending or resuming them, as well as dropping them into 
the userland-debugger from inside kdl.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21734 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Marcus Overhagen 2007-07-29 01:06:36 +00:00
parent 8f5e97473f
commit 3ab19002fe
1 changed files with 72 additions and 4 deletions
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76
src/system/kernel/thread.c
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@ -535,12 +535,15 @@ make_thread_suspended(int argc, char **argv)
struct hash_iterator i;
int32 id;
if (argc != 2) {
if (argc > 2) {
kprintf("usage: suspend [thread-id]\n");
return 0;
}
id = strtoul(argv[1], NULL, 0);
if (argc == 1)
id = thread_get_current_thread()->id;
else
id = strtoul(argv[1], NULL, 0);
hash_open(sThreadHash, &i);
@ -549,17 +552,80 @@ make_thread_suspended(int argc, char **argv)
continue;
thread->state = thread->next_state = B_THREAD_SUSPENDED;
kprintf("thread 0x%lx suspended\n", thread->id);
kprintf("thread 0x%lx suspended\n", id);
break;
}
if (!thread)
kprintf("thread 0x%lx not found\n", thread->id);
kprintf("thread 0x%lx not found\n", id);
hash_close(sThreadHash, &i, false);
return 0;
}
static int
make_thread_resumed(int argc, char **argv)
{
struct thread *thread;
struct hash_iterator i;
int32 id;
if (argc != 2) {
kprintf("usage: resume <thread-id>\n");
return 0;
}
// force user to enter a thread id, as using
// the current thread is usually not intended
id = strtoul(argv[1], NULL, 0);
hash_open(sThreadHash, &i);
while ((thread = hash_next(sThreadHash, &i)) != NULL) {
if (thread->id != id)
continue;
if (thread->state == B_THREAD_SUSPENDED) {
thread->state = thread->next_state = B_THREAD_READY;
scheduler_enqueue_in_run_queue(thread);
kprintf("thread 0x%lx resumed\n", thread->id);
}
break;
}
if (!thread)
kprintf("thread 0x%lx not found\n", id);
hash_close(sThreadHash, &i, false);
return 0;
}
static int
drop_into_debugger(int argc, char **argv)
{
status_t err;
int32 id;
if (argc > 2) {
kprintf("usage: drop [thread-id]\n");
return 0;
}
if (argc == 1)
id = thread_get_current_thread()->id;
else
id = strtoul(argv[1], NULL, 0);
err = _user_debug_thread(id);
if (err)
kprintf("drop failed\n");
else
kprintf("thread 0x%lx dropped into user debugger\n", id);
return 0;
}
static const char *
state_to_text(struct thread *thread, int32 state)
{
@ -1570,6 +1636,8 @@ thread_init(kernel_args *args)
add_debugger_command("next_team", &dump_next_thread_in_team, "dump the next thread in the team of the last thread viewed");
add_debugger_command("unreal", &make_thread_unreal, "set realtime priority threads to normal priority");
add_debugger_command("suspend", &make_thread_suspended, "suspend a thread");
add_debugger_command("resume", &make_thread_resumed, "resume a thread");
add_debugger_command("drop", &drop_into_debugger, "drop a thread into the user-debugger");
return B_OK;
}