+
+void
+start_kern_tracing(unsigned int new_nkdbufs) {
+
+ if (!new_nkdbufs)
+ return;
+ kdbg_set_nkdbufs(new_nkdbufs);
+ kdbg_lock_init();
+ kdbg_reinit(TRUE);
+ kdbg_set_tracing_enabled(TRUE);
+
+#if defined(__i386__) || defined(__x86_64__)
+ uint64_t now = mach_absolute_time();
+
+ KERNEL_DEBUG_CONSTANT((TRACEDBG_CODE(DBG_TRACE_INFO, 1)) | DBG_FUNC_NONE,
+ (uint32_t)(tsc_rebase_abs_time >> 32), (uint32_t)tsc_rebase_abs_time,
+ (uint32_t)(now >> 32), (uint32_t)now,
+ 0);
+#endif
+ printf("kernel tracing started\n");
+}
+
+void
+kdbg_dump_trace_to_file(const char *filename)
+{
+ vfs_context_t ctx;
+ vnode_t vp;
+ int error;
+ size_t number;
+
+
+ if ( !(kdebug_enable & KDEBUG_ENABLE_TRACE))
+ return;
+
+ if (global_state_pid != -1) {
+ if ((proc_find(global_state_pid)) != NULL) {
+ /*
+ * The global pid exists, we're running
+ * due to fs_usage, latency, etc...
+ * don't cut the panic/shutdown trace file
+ */
+ return;
+ }
+ }
+ KERNEL_DEBUG_CONSTANT((TRACEDBG_CODE(DBG_TRACE_INFO, 0)) | DBG_FUNC_NONE, 0, 0, 0, 0, 0);
+
+ kdebug_enable = 0;
+ kd_ctrl_page.enabled = 0;
+
+ ctx = vfs_context_kernel();
+
+ if ((error = vnode_open(filename, (O_CREAT | FWRITE | O_NOFOLLOW), 0600, 0, &vp, ctx)))
+ return;
+
+ number = kd_mapsize;
+ kdbg_readmap(0, &number, vp, ctx);
+
+ number = nkdbufs*sizeof(kd_buf);
+ kdbg_read(0, &number, vp, ctx);
+
+ vnode_close(vp, FWRITE, ctx);
+
+ sync(current_proc(), (void *)NULL, (int *)NULL);
+}
+
+/* Helper function for filling in the BSD name for an address space
+ * Defined here because the machine bindings know only Mach threads
+ * and nothing about BSD processes.
+ *
+ * FIXME: need to grab a lock during this?
+ */
+void kdbg_get_task_name(char* name_buf, int len, task_t task)
+{
+ proc_t proc;
+
+ /* Note: we can't use thread->task (and functions that rely on it) here
+ * because it hasn't been initialized yet when this function is called.
+ * We use the explicitly-passed task parameter instead.
+ */
+ proc = get_bsdtask_info(task);
+ if (proc != PROC_NULL)
+ snprintf(name_buf, len, "%s/%d", proc->p_comm, proc->p_pid);
+ else
+ snprintf(name_buf, len, "%p [!bsd]", task);
+}
+
+
+
+#if defined(NATIVE_TRACE_FACILITY)
+void trace_handler_map_ctrl_page(__unused uintptr_t addr, __unused size_t ctrl_page_size, __unused size_t storage_size, __unused size_t kds_ptr_size)
+{
+}
+void trace_handler_map_bufinfo(__unused uintptr_t addr, __unused size_t size)
+{
+}
+void trace_handler_unmap_bufinfo(void)
+{
+}
+void trace_handler_map_buffer(__unused int index, __unused uintptr_t addr, __unused size_t size)
+{
+}
+void trace_handler_unmap_buffer(__unused int index)
+{
+}
+#endif
projects / apple / xnu.git / blobdiff