*/
#include <mach/mach_types.h>
+#include <mach/vm_param.h>
#include <sys/appleapiopts.h>
#include <kern/debug.h>
#include <uuid/uuid.h>
#include <kdp/kdp_dyld.h>
#include <libsa/types.h>
+#include <libkern/version.h>
#include <string.h> /* bcopy */
#include <kern/processor.h>
#include <kern/thread.h>
+#include <kern/clock.h>
#include <vm/vm_map.h>
#include <vm/vm_kern.h>
+#include <vm/vm_pageout.h>
+
+extern int count_busy_buffers(void); /* must track with declaration in bsd/sys/buf_internal.h */
#define DO_ALIGN 1 /* align all packet data accesses */
boolean_t kdp_copyin(pmap_t, uint64_t, void *, size_t);
extern void bcopy_phys(addr64_t, addr64_t, vm_size_t);
-extern char version[];
-
boolean_t
kdp_packet(
unsigned char *pkt,
rp->error = KDPERR_ALREADY_CONNECTED;
}
else {
- kdp.reply_port = rport;
- kdp.exception_port = eport;
- kdp.is_conn = TRUE;
- kdp.conn_seq = seq;
+ kdp.reply_port = rport;
+ kdp.exception_port = eport;
+ kdp.is_conn = TRUE;
+ kdp.conn_seq = seq;
kdp.session_key = key;
rp->error = KDPERR_NO_ERROR;
rp->hdr.len = sizeof (*rp);
dprintf(("kdp_kernelversion\n"));
- slen = strlcpy(rp->version, version, MAX_KDP_DATA_SIZE);
+ slen = strlcpy(rp->version, kdp_kernelversion_string, MAX_KDP_DATA_SIZE);
rp->hdr.len += slen + 1; /* strlcpy returns the amount copied with NUL */
size_t plen = *len;
kdp_readmem_reply_t *rp = &pkt->readmem_reply;
mach_vm_size_t cnt;
-#if __i386__ || __arm__
- void *pversion = &version;
+#if __i386__
+ void *pversion = &kdp_kernelversion_string;
#endif
if (plen < sizeof (*rq))
unsigned int n = rq->nbytes;
dprintf(("kdp_readmem addr %x size %d\n", rq->address, n));
-#if __i386__ || __arm__
+#if __i386__
/* XXX This is a hack to facilitate the "showversion" macro
- * on i386/ARM, which is used to obtain the kernel version without
+ * on i386, which is used to obtain the kernel version without
* symbols - a pointer to the version string should eventually
* be pinned at a fixed address when an equivalent of the
* VECTORS segment (loaded at a fixed load address, and contains
return (rem == 0);
}
+
+static void
+kdp_mem_and_io_snapshot(struct mem_and_io_snapshot *memio_snap)
+{
+ unsigned int pages_reclaimed;
+ unsigned int pages_wanted;
+ kern_return_t kErr;
+
+ memio_snap->snapshot_magic = STACKSHOT_MEM_AND_IO_SNAPSHOT_MAGIC;
+ memio_snap->free_pages = vm_page_free_count;
+ memio_snap->active_pages = vm_page_active_count;
+ memio_snap->inactive_pages = vm_page_inactive_count;
+ memio_snap->purgeable_pages = vm_page_purgeable_count;
+ memio_snap->wired_pages = vm_page_wire_count;
+ memio_snap->speculative_pages = vm_page_speculative_count;
+ memio_snap->throttled_pages = vm_page_throttled_count;
+ memio_snap->busy_buffer_count = count_busy_buffers();
+ kErr = mach_vm_pressure_monitor(FALSE, VM_PRESSURE_TIME_WINDOW, &pages_reclaimed, &pages_wanted);
+ if ( ! kErr ) {
+ memio_snap->pages_wanted = (uint32_t)pages_wanted;
+ memio_snap->pages_reclaimed = (uint32_t)pages_reclaimed;
+ memio_snap->pages_wanted_reclaimed_valid = 1;
+ } else {
+ memio_snap->pages_wanted = 0;
+ memio_snap->pages_reclaimed = 0;
+ memio_snap->pages_wanted_reclaimed_valid = 0;
+ }
+}
+
+
+
+/*
+ * Method for grabbing timer values safely, in the sense that no infinite loop will occur
+ * Certain flavors of the timer_grab function, which would seem to be the thing to use,
+ * can loop infinitely if called while the timer is in the process of being updated.
+ * Unfortunately, it is (rarely) possible to get inconsistent top and bottom halves of
+ * the timer using this method. This seems insoluble, since stackshot runs in a context
+ * where the timer might be half-updated, and has no way of yielding control just long
+ * enough to finish the update.
+ */
+
+static uint64_t safe_grab_timer_value(struct timer *t)
+{
+#if defined(__LP64__)
+ return t->all_bits;
+#else
+ uint64_t time = t->high_bits; /* endian independent grab */
+ time = (time << 32) | t->low_bits;
+ return time;
+#endif
+}
+
int
kdp_stackshot(int pid, void *tracebuf, uint32_t tracebuf_size, uint32_t trace_flags, uint32_t dispatch_offset, uint32_t *pbytesTraced)
{
unsigned framesize = 2 * sizeof(vm_offset_t);
struct task ctask;
struct thread cthread;
+ struct _vm_map cmap;
+ struct pmap cpmap;
+
+ queue_head_t *task_list = &tasks;
+ boolean_t is_active_list = TRUE;
boolean_t dispatch_p = ((trace_flags & STACKSHOT_GET_DQ) != 0);
boolean_t save_loadinfo_p = ((trace_flags & STACKSHOT_SAVE_LOADINFO) != 0);
- queue_iterate(&tasks, task, task_t, tasks) {
+ if(trace_flags & STACKSHOT_GET_GLOBAL_MEM_STATS) {
+ if(tracepos + sizeof(struct mem_and_io_snapshot) > tracebound) {
+ error = -1;
+ goto error_exit;
+ }
+ kdp_mem_and_io_snapshot((struct mem_and_io_snapshot *)tracepos);
+ tracepos += sizeof(struct mem_and_io_snapshot);
+ }
+
+walk_list:
+ queue_iterate(task_list, task, task_t, tasks) {
if ((task == NULL) || (ml_nofault_copy((vm_offset_t) task, (vm_offset_t) &ctask, sizeof(struct task)) != sizeof(struct task)))
goto error_exit;
int task_pid = pid_from_task(task);
boolean_t task64 = task_has_64BitAddr(task);
+ if (!task->active) {
+ /*
+ * Not interested in terminated tasks without threads, and
+ * at the moment, stackshot can't handle a task without a name.
+ */
+ if (queue_empty(&task->threads) || task_pid == -1) {
+ continue;
+ }
+ }
+
/* Trace everything, unless a process was specified */
if ((pid == -1) || (pid == task_pid)) {
task_snapshot_t task_snap;
- uint32_t uuid_info_count;
- mach_vm_address_t uuid_info_addr;
-
- if (save_loadinfo_p && task_pid > 0) {
+ uint32_t uuid_info_count = 0;
+ mach_vm_address_t uuid_info_addr = 0;
+ boolean_t have_map = (task->map != NULL) &&
+ (ml_nofault_copy((vm_offset_t)(task->map), (vm_offset_t)&cmap, sizeof(struct _vm_map)) == sizeof(struct _vm_map));
+ boolean_t have_pmap = have_map && (cmap.pmap != NULL) &&
+ (ml_nofault_copy((vm_offset_t)(cmap.pmap), (vm_offset_t)&cpmap, sizeof(struct pmap)) == sizeof(struct pmap));
+
+ if (have_pmap && task->active && save_loadinfo_p && task_pid > 0) {
// Read the dyld_all_image_infos struct from the task memory to get UUID array count and location
if (task64) {
- struct dyld_all_image_infos64 task_image_infos;
- if (!kdp_copyin(task->map->pmap, task->all_image_info_addr, &task_image_infos, sizeof(struct dyld_all_image_infos64)))
- goto error_exit;
- uuid_info_count = (uint32_t)task_image_infos.uuidArrayCount;
- uuid_info_addr = task_image_infos.uuidArray;
+ struct user64_dyld_all_image_infos task_image_infos;
+ if (kdp_copyin(task->map->pmap, task->all_image_info_addr, &task_image_infos, sizeof(struct user64_dyld_all_image_infos))) {
+ uuid_info_count = (uint32_t)task_image_infos.uuidArrayCount;
+ uuid_info_addr = task_image_infos.uuidArray;
+ }
} else {
- struct dyld_all_image_infos task_image_infos;
- if (!kdp_copyin(task->map->pmap, task->all_image_info_addr, &task_image_infos, sizeof(struct dyld_all_image_infos)))
- goto error_exit;
- uuid_info_count = task_image_infos.uuidArrayCount;
- uuid_info_addr = task_image_infos.uuidArray;
+ struct user32_dyld_all_image_infos task_image_infos;
+ if (kdp_copyin(task->map->pmap, task->all_image_info_addr, &task_image_infos, sizeof(struct user32_dyld_all_image_infos))) {
+ uuid_info_count = task_image_infos.uuidArrayCount;
+ uuid_info_addr = task_image_infos.uuidArray;
+ }
+ }
+
+ // If we get a NULL uuid_info_addr (which can happen when we catch dyld in the middle of updating
+ // this data structure), we zero the uuid_info_count so that we won't even try to save load info
+ // for this task.
+ if (!uuid_info_addr) {
+ uuid_info_count = 0;
}
- } else {
- uuid_info_count = 0;
- uuid_info_addr = 0;
}
if (tracepos + sizeof(struct task_snapshot) > tracebound) {
task_snap->ss_flags = 0;
if (task64)
task_snap->ss_flags |= kUser64_p;
+ if (!task->active)
+ task_snap->ss_flags |= kTerminatedSnapshot;
+ if(task->pidsuspended) task_snap->ss_flags |= kPidSuspended;
+ if(task->frozen) task_snap->ss_flags |= kFrozen;
+
+ task_snap->suspend_count = task->suspend_count;
+ task_snap->task_size = have_pmap ? pmap_resident_count(task->map->pmap) : 0;
+ task_snap->faults = task->faults;
+ task_snap->pageins = task->pageins;
+ task_snap->cow_faults = task->cow_faults;
+ task_snap->user_time_in_terminated_threads = task->total_user_time;
+ task_snap->system_time_in_terminated_threads = task->total_system_time;
tracepos += sizeof(struct task_snapshot);
if (task_pid > 0 && uuid_info_count > 0) {
- uint32_t uuid_info_size = (uint32_t)(task64 ? sizeof(struct dyld_uuid_info64) : sizeof(struct dyld_uuid_info));
+ uint32_t uuid_info_size = (uint32_t)(task64 ? sizeof(struct user64_dyld_uuid_info) : sizeof(struct user32_dyld_uuid_info));
uint32_t uuid_info_array_size = uuid_info_count * uuid_info_size;
if (tracepos + uuid_info_array_size > tracebound) {
}
// Copy in the UUID info array
- if (!kdp_copyin(task->map->pmap, uuid_info_addr, tracepos, uuid_info_array_size))
- goto error_exit;
-
- tracepos += uuid_info_array_size;
+ // It may be nonresident, in which case just fix up nloadinfos to 0 in the task_snap
+ if (have_pmap && !kdp_copyin(task->map->pmap, uuid_info_addr, tracepos, uuid_info_array_size))
+ task_snap->nloadinfos = 0;
+ else
+ tracepos += uuid_info_array_size;
}
queue_iterate(&task->threads, thread, thread_t, task_threads){
+ uint64_t tval;
+
if ((thread == NULL) || (ml_nofault_copy((vm_offset_t) thread, (vm_offset_t) &cthread, sizeof(struct thread)) != sizeof(struct thread)))
goto error_exit;
tsnap = (thread_snapshot_t) tracepos;
tsnap->thread_id = thread_tid(thread);
tsnap->state = thread->state;
- tsnap->wait_event = thread->wait_event;
- tsnap->continuation = (uint64_t) (uintptr_t) thread->continuation;
-
+ tsnap->sched_pri = thread->sched_pri;
+ tsnap->sched_flags = thread->sched_flags;
+ tsnap->wait_event = VM_KERNEL_UNSLIDE(thread->wait_event);
+ tsnap->continuation = VM_KERNEL_UNSLIDE(thread->continuation);
+ tval = safe_grab_timer_value(&thread->user_timer);
+ tsnap->user_time = tval;
+ tval = safe_grab_timer_value(&thread->system_timer);
+ if (thread->precise_user_kernel_time) {
+ tsnap->system_time = tval;
+ } else {
+ tsnap->user_time += tval;
+ tsnap->system_time = 0;
+ }
tsnap->snapshot_magic = STACKSHOT_THREAD_SNAPSHOT_MAGIC;
tracepos += sizeof(struct thread_snapshot);
tsnap->ss_flags = 0;
- if (dispatch_p && (task != kernel_task) && (task->active) && (task->map)) {
+ if (dispatch_p && (task != kernel_task) && (task->active) && have_pmap) {
uint64_t dqkeyaddr = thread_dispatchqaddr(thread);
if (dqkeyaddr != 0) {
uint64_t dqaddr = 0;
/* Call through to the machine specific trace routines
* Frames are added past the snapshot header.
*/
+ tracebytes = 0;
if (thread->kernel_stack != 0) {
#if defined(__LP64__)
tracebytes = machine_trace_thread64(thread, tracepos, tracebound, MAX_FRAMES, FALSE);
tracepos += tracebytes;
tracebytes = 0;
/* Trace user stack, if any */
- if (thread->task->map != kernel_map) {
+ if (task->active && thread->task->map != kernel_map) {
/* 64-bit task? */
if (task_has_64BitAddr(thread->task)) {
tracebytes = machine_trace_thread64(thread, tracepos, tracebound, MAX_FRAMES, TRUE);
}
}
+ if (is_active_list) {
+ is_active_list = FALSE;
+ task_list = &terminated_tasks;
+ goto walk_list;
+ }
+
error_exit:
/* Release stack snapshot wait indicator */
kdp_snapshot_postflight();
projects / apple / xnu.git / blobdiff