diff options
Diffstat (limited to 'kern/thread.c')
| -rw-r--r-- | kern/thread.c | 59 |
1 files changed, 58 insertions, 1 deletions
diff --git a/kern/thread.c b/kern/thread.c index 68aa7285..17ac10bd 100644 --- a/kern/thread.c +++ b/kern/thread.c @@ -101,6 +101,7 @@ #include <kern/panic.h> #include <kern/param.h> #include <kern/percpu.h> +#include <kern/shell.h> #include <kern/sleepq.h> #include <kern/spinlock.h> #include <kern/sref.h> @@ -2228,10 +2229,61 @@ thread_setup_runq(struct thread_runq *runq) thread_setup_idler(runq); } +/* + * This function is meant for debugging only. As a result, it uses a weak + * locking policy which allows tracing threads which state may mutate during + * tracing. + */ +static void +thread_shell_trace(int argc, char *argv[]) +{ + const char *task_name, *thread_name; + struct thread *thread; + struct task *task; + int error; + + if (argc != 3) { + error = ERROR_INVAL; + goto error; + } + + task_name = argv[1]; + thread_name = argv[2]; + + task = task_lookup(task_name); + + if (task == NULL) { + error = ERROR_SRCH; + goto error; + } + + thread = task_lookup_thread(task, thread_name); + task_unref(task); + + if (thread == NULL) { + error = ERROR_SRCH; + goto error; + } + + tcb_trace(&thread->tcb); + thread_unref(thread); + return; + +error: + printf("thread: trace: %s\n", error_str(error)); +} + +static struct shell_cmd thread_shell_cmds[] = { + SHELL_CMD_INITIALIZER("thread_trace", thread_shell_trace, + "thread_trace <task_name> <thread_name>", + "print the stack trace of a given thread"), +}; + void __init thread_setup(void) { - int cpu; + unsigned int i; + int cpu, error; for (cpu = 1; (unsigned int)cpu < cpu_count(); cpu++) { thread_bootstrap_common(cpu); @@ -2249,6 +2301,11 @@ thread_setup(void) cpumap_for_each(&thread_active_runqs, cpu) { thread_setup_runq(percpu_ptr(thread_runq, cpu)); } + + for (i = 0; i < ARRAY_SIZE(thread_shell_cmds); i++) { + error = shell_cmd_register(&thread_shell_cmds[i]); + error_check(error, __func__); + } } int |