#include <mach/mach_types.h>
#include <mach/vm_param.h>
+#include <mach/mach_vm.h>
+#include <sys/errno.h>
+#include <sys/stackshot.h>
#ifdef IMPORTANCE_INHERITANCE
#include <ipc/ipc_importance.h>
#endif
#include <kern/processor.h>
#include <kern/thread.h>
+#include <kern/telemetry.h>
#include <kern/clock.h>
#include <vm/vm_map.h>
#include <vm/vm_kern.h>
#include <vm/vm_pageout.h>
+#include <vm/vm_fault.h>
#include <vm/vm_shared_region.h>
#include <libkern/OSKextLibPrivate.h>
+#if (defined(__arm64__) || defined(NAND_PANIC_DEVICE)) && !defined(LEGACY_PANIC_LOGS)
+#include <pexpert/pexpert.h> /* For gPanicBase/gPanicBase */
+#endif
+
extern unsigned int not_in_kdp;
/*
int kdp_snapshot = 0;
static int stack_snapshot_ret = 0;
-static unsigned stack_snapshot_bytes_traced = 0;
+static uint32_t stack_snapshot_bytes_traced = 0;
+static kcdata_descriptor_t stackshot_kcdata_p = NULL;
static void *stack_snapshot_buf;
static uint32_t stack_snapshot_bufsize;
int stack_snapshot_pid;
static uint32_t stack_snapshot_flags;
-static uint32_t stack_snapshot_dispatch_offset;
static unsigned int old_debugger;
+static boolean_t stack_enable_faulting;
+
+void *kernel_stackshot_buf = NULL; /* Pointer to buffer for stackshots triggered from the kernel and retrieved later */
+int kernel_stackshot_buf_size = 0;
+
+void *stackshot_snapbuf = NULL; /* Used by stack_snapshot2 (to be removed) */
+__private_extern__ void stackshot_lock_init( void );
+static boolean_t memory_iszero(void *addr, size_t size);
+kern_return_t stack_snapshot2(int pid, user_addr_t tracebuf, uint32_t tracebuf_size, uint32_t flags, int32_t *retval);
+kern_return_t stack_snapshot_from_kernel_internal(int pid, void *buf, uint32_t size, uint32_t flags, unsigned *bytes_traced);
+#if CONFIG_TELEMETRY
+kern_return_t stack_microstackshot(user_addr_t tracebuf, uint32_t tracebuf_size, uint32_t flags, int32_t *retval);
+#endif
+uint32_t get_stackshot_estsize(uint32_t prev_size_hint);
+kern_return_t kern_stack_snapshot_internal(int stackshot_config_version, void *stackshot_config,
+ size_t stackshot_config_size, boolean_t stackshot_from_user);
void do_stackshot(void);
-void kdp_snapshot_preflight(int pid, void * tracebuf, uint32_t tracebuf_size,
- uint32_t flags, uint32_t dispatch_offset);
+void kdp_snapshot_preflight(int pid, void * tracebuf, uint32_t tracebuf_size, uint32_t flags, kcdata_descriptor_t data_p, boolean_t enable_faulting);
void kdp_snapshot_postflight(void);
-static int kdp_stackshot(int pid, void *tracebuf, uint32_t tracebuf_size,
- uint32_t flags, uint32_t dispatch_offset, uint32_t *pbytesTraced);
+static int kdp_stackshot(int pid, void *tracebuf, uint32_t tracebuf_size, uint32_t flags, uint32_t *pbytesTraced);
+static int kdp_stackshot_kcdata_format(int pid, uint32_t trace_flags, uint32_t *pBytesTraced);
int kdp_stack_snapshot_geterror(void);
-int kdp_stack_snapshot_bytes_traced(void);
-int kdp_stackshot(int pid, void *tracebuf, uint32_t tracebuf_size, uint32_t trace_flags, uint32_t dispatch_offset, uint32_t *pbytesTraced);
+uint32_t kdp_stack_snapshot_bytes_traced(void);
+int kdp_stackshot(int pid, void *tracebuf, uint32_t tracebuf_size, uint32_t trace_flags, uint32_t *pbytesTraced);
static int pid_from_task(task_t task);
static uint64_t proc_uniqueid_from_task(task_t task);
static void kdp_mem_and_io_snapshot(struct mem_and_io_snapshot *memio_snap);
extern void proc_name_kdp(task_t task, char *buf, int size);
extern int proc_threadname_kdp(void *uth, char *buf, size_t size);
extern void proc_starttime_kdp(void *p, uint64_t *tv_sec, uint64_t *tv_usec);
+extern uint64_t get_dispatchqueue_serialno_offset_from_proc(void *p);
+static uint64_t proc_dispatchqueue_serialno_offset_from_task(task_t task);
+extern int memorystatus_get_pressure_status_kdp(void);
extern int count_busy_buffers(void); /* must track with declaration in bsd/sys/buf_internal.h */
extern void bcopy_phys(addr64_t, addr64_t, vm_size_t);
-extern int machine_trace_thread(thread_t thread, char *tracepos, char *tracebound, int nframes, boolean_t user_p);
-extern int machine_trace_thread64(thread_t thread, char *tracepos, char *tracebound, int nframes, boolean_t user_p);
+extern int machine_trace_thread(thread_t thread, char *tracepos, char *tracebound, int nframes, boolean_t user_p, uint32_t *thread_trace_flags);
+extern int machine_trace_thread64(thread_t thread, char *tracepos, char *tracebound, int nframes, boolean_t user_p, uint32_t *thread_trace_flags);
/* Validates that the given address is both a valid page and has
* default caching attributes for the current kdp_pmap. Returns
* 0 if the address is invalid, and a kernel virtual address for
* the given address if it is valid.
*/
-vm_offset_t machine_trace_thread_get_kva(vm_offset_t cur_target_addr);
+vm_offset_t machine_trace_thread_get_kva(vm_offset_t cur_target_addr, vm_map_t map, uint32_t *thread_trace_flags);
/* Clears caching information used by the above validation routine
* (in case the kdp_pmap has been changed or cleared).
void machine_trace_thread_clear_validation_cache(void);
#define MAX_FRAMES 1000
+#define MAX_LOADINFOS 500
+#define USECSPERSEC 1000000
+#define TASK_IMP_WALK_LIMIT 20
typedef struct thread_snapshot *thread_snapshot_t;
typedef struct task_snapshot *task_snapshot_t;
static vm_offset_t prev_target_kva = 0;
static boolean_t validate_next_addr = TRUE;
+/*
+ * Stackshot locking and other defines.
+ */
+static lck_grp_t *stackshot_subsys_lck_grp;
+static lck_grp_attr_t *stackshot_subsys_lck_grp_attr;
+static lck_attr_t *stackshot_subsys_lck_attr;
+static lck_mtx_t stackshot_subsys_mutex;
+
+#define STACKSHOT_SUBSYS_LOCK() lck_mtx_lock(&stackshot_subsys_mutex)
+#define STACKSHOT_SUBSYS_UNLOCK() lck_mtx_unlock(&stackshot_subsys_mutex)
+#if defined(__i386__) || defined (__x86_64__)
+#define TRAP_DEBUGGER __asm__ volatile("int3")
+#else
+#error No TRAP_DEBUGGER definition for this architecture
+#endif
+
+/* Initialize the mutex governing access to the stack snapshot subsystem */
+__private_extern__ void
+stackshot_lock_init( void )
+{
+ stackshot_subsys_lck_grp_attr = lck_grp_attr_alloc_init();
+
+ stackshot_subsys_lck_grp = lck_grp_alloc_init("stackshot_subsys_lock", stackshot_subsys_lck_grp_attr);
+
+ stackshot_subsys_lck_attr = lck_attr_alloc_init();
+
+ lck_mtx_init(&stackshot_subsys_mutex, stackshot_subsys_lck_grp, stackshot_subsys_lck_attr);
+}
+
+#define SANE_BOOTPROFILE_TRACEBUF_SIZE (64 * 1024 * 1024)
+#define SANE_TRACEBUF_SIZE (8 * 1024 * 1024)
+
+#define STACKSHOT_SUPP_SIZE (16 * 1024) /* Minimum stackshot size */
+#define TASK_UUID_AVG_SIZE (16 * sizeof(uuid_t)) /* Average space consumed by UUIDs/task */
/*
* Method for grabbing timer values safely, in the sense that no infinite loop will occur
#endif
}
+/*
+ * Old, inefficient stackshot call. This will be removed in the next release and is being replaced with
+ * two syscalls -- stack_snapshot_with_config and stack_microsnapshot.
+ */
+kern_return_t
+stack_snapshot2(int pid, user_addr_t tracebuf, uint32_t tracebuf_size, uint32_t flags, int32_t *retval)
+{
+ boolean_t istate;
+ int error = KERN_SUCCESS;
+ unsigned bytesTraced = 0;
+
+#if CONFIG_TELEMETRY
+ if (flags & STACKSHOT_GLOBAL_MICROSTACKSHOT_ENABLE) {
+ telemetry_global_ctl(1);
+ *retval = 0;
+ return (0);
+ } else if (flags & STACKSHOT_GLOBAL_MICROSTACKSHOT_DISABLE) {
+ telemetry_global_ctl(0);
+ *retval = 0;
+ return (0);
+ }
+
+ if (flags & STACKSHOT_WINDOWED_MICROSTACKSHOTS_ENABLE) {
+ error = telemetry_enable_window();
+
+ if (error != KERN_SUCCESS) {
+ /* We are probably out of memory */
+ *retval = -1;
+ return KERN_RESOURCE_SHORTAGE;
+ }
+
+ *retval = 0;
+ return (0);
+ } else if (flags & STACKSHOT_WINDOWED_MICROSTACKSHOTS_DISABLE) {
+ telemetry_disable_window();
+ *retval = 0;
+ return (0);
+ }
+#endif
+
+ *retval = -1;
+ /* Serialize tracing */
+ STACKSHOT_SUBSYS_LOCK();
+
+ if (tracebuf_size <= 0) {
+ error = KERN_INVALID_ARGUMENT;
+ goto error_exit;
+ }
+
+#if CONFIG_TELEMETRY
+ if (flags & STACKSHOT_GET_MICROSTACKSHOT) {
+
+ if (tracebuf_size > SANE_TRACEBUF_SIZE) {
+ error = KERN_INVALID_ARGUMENT;
+ goto error_exit;
+ }
+
+ bytesTraced = tracebuf_size;
+ error = telemetry_gather(tracebuf, &bytesTraced,
+ (flags & STACKSHOT_SET_MICROSTACKSHOT_MARK) ? TRUE : FALSE);
+ *retval = (int)bytesTraced;
+ goto error_exit;
+ }
+
+ if (flags & STACKSHOT_GET_WINDOWED_MICROSTACKSHOTS) {
+
+ if (tracebuf_size > SANE_TRACEBUF_SIZE) {
+ error = KERN_INVALID_ARGUMENT;
+ goto error_exit;
+ }
+
+ bytesTraced = tracebuf_size;
+ error = telemetry_gather_windowed(tracebuf, &bytesTraced);
+ *retval = (int)bytesTraced;
+ goto error_exit;
+ }
+
+ if (flags & STACKSHOT_GET_BOOT_PROFILE) {
+
+ if (tracebuf_size > SANE_BOOTPROFILE_TRACEBUF_SIZE) {
+ error = KERN_INVALID_ARGUMENT;
+ goto error_exit;
+ }
+
+ bytesTraced = tracebuf_size;
+ error = bootprofile_gather(tracebuf, &bytesTraced);
+ *retval = (int)bytesTraced;
+ goto error_exit;
+ }
+#endif
+
+ if (tracebuf_size > SANE_TRACEBUF_SIZE) {
+ error = KERN_INVALID_ARGUMENT;
+ goto error_exit;
+ }
+
+ assert(stackshot_snapbuf == NULL);
+ if (kmem_alloc_kobject(kernel_map, (vm_offset_t *)&stackshot_snapbuf, tracebuf_size, VM_KERN_MEMORY_DIAG) != KERN_SUCCESS) {
+ error = KERN_RESOURCE_SHORTAGE;
+ goto error_exit;
+ }
+
+ if (panic_active()) {
+ error = KERN_RESOURCE_SHORTAGE;
+ goto error_exit;
+ }
+
+ istate = ml_set_interrupts_enabled(FALSE);
+ /* Preload trace parameters */
+ kdp_snapshot_preflight(pid, stackshot_snapbuf, tracebuf_size, flags, NULL, FALSE);
+
+ /* Trap to the debugger to obtain a coherent stack snapshot; this populates
+ * the trace buffer
+ */
+
+ TRAP_DEBUGGER;
+
+ ml_set_interrupts_enabled(istate);
+
+ bytesTraced = kdp_stack_snapshot_bytes_traced();
+
+ if (bytesTraced > 0) {
+ if ((error = copyout(stackshot_snapbuf, tracebuf,
+ ((bytesTraced < tracebuf_size) ?
+ bytesTraced : tracebuf_size))))
+ goto error_exit;
+ *retval = bytesTraced;
+ }
+ else {
+ error = KERN_NOT_IN_SET;
+ goto error_exit;
+ }
+
+ error = kdp_stack_snapshot_geterror();
+ if (error == -1) {
+ error = KERN_NO_SPACE;
+ *retval = -1;
+ goto error_exit;
+ }
+
+error_exit:
+ if (stackshot_snapbuf != NULL)
+ kmem_free(kernel_map, (vm_offset_t) stackshot_snapbuf, tracebuf_size);
+ stackshot_snapbuf = NULL;
+ STACKSHOT_SUBSYS_UNLOCK();
+ return error;
+}
+
+kern_return_t
+stack_snapshot_from_kernel_internal(int pid, void *buf, uint32_t size, uint32_t flags, unsigned *bytes_traced)
+{
+ int error = 0;
+ boolean_t istate;
+
+ if ((buf == NULL) || (size <= 0) || (bytes_traced == NULL)) {
+ return KERN_INVALID_ARGUMENT;
+ }
+
+ /* cap in individual stackshot to SANE_TRACEBUF_SIZE */
+ if (size > SANE_TRACEBUF_SIZE) {
+ size = SANE_TRACEBUF_SIZE;
+ }
+
+ /* Serialize tracing */
+ STACKSHOT_SUBSYS_LOCK();
+ istate = ml_set_interrupts_enabled(FALSE);
+
+
+ /* Preload trace parameters*/
+ kdp_snapshot_preflight(pid, buf, size, flags, NULL, FALSE);
+
+ /* Trap to the debugger to obtain a coherent stack snapshot; this populates
+ * the trace buffer
+ */
+ TRAP_DEBUGGER;
+
+ ml_set_interrupts_enabled(istate);
+
+ *bytes_traced = kdp_stack_snapshot_bytes_traced();
+
+ error = kdp_stack_snapshot_geterror();
+
+ STACKSHOT_SUBSYS_UNLOCK();
+
+ return error;
+}
+
+#if CONFIG_TELEMETRY
+kern_return_t
+stack_microstackshot(user_addr_t tracebuf, uint32_t tracebuf_size, uint32_t flags, int32_t *retval)
+{
+ int error = KERN_SUCCESS;
+ uint32_t bytes_traced = 0;
+
+ *retval = -1;
+
+ /*
+ * Control related operations
+ */
+ if (flags & STACKSHOT_GLOBAL_MICROSTACKSHOT_ENABLE) {
+ telemetry_global_ctl(1);
+ *retval = 0;
+ goto exit;
+ } else if (flags & STACKSHOT_GLOBAL_MICROSTACKSHOT_DISABLE) {
+ telemetry_global_ctl(0);
+ *retval = 0;
+ goto exit;
+ }
+
+ if (flags & STACKSHOT_WINDOWED_MICROSTACKSHOTS_ENABLE) {
+ error = telemetry_enable_window();
+
+ if (error != KERN_SUCCESS) {
+ /*
+ * We are probably out of memory
+ */
+ *retval = -1;
+ error = KERN_RESOURCE_SHORTAGE;
+ goto exit;
+ }
+
+ *retval = 0;
+ goto exit;
+ } else if (flags & STACKSHOT_WINDOWED_MICROSTACKSHOTS_DISABLE) {
+ telemetry_disable_window();
+ *retval = 0;
+ goto exit;
+ }
+
+ /*
+ * Data related operations
+ */
+ *retval = -1;
+
+ if ((((void*)tracebuf) == NULL) || (tracebuf_size == 0)) {
+ error = KERN_INVALID_ARGUMENT;
+ goto exit;
+ }
+
+ STACKSHOT_SUBSYS_LOCK();
+
+ if (flags & STACKSHOT_GET_MICROSTACKSHOT) {
+ if (tracebuf_size > SANE_TRACEBUF_SIZE) {
+ error = KERN_INVALID_ARGUMENT;
+ goto unlock_exit;
+ }
+
+ bytes_traced = tracebuf_size;
+ error = telemetry_gather(tracebuf, &bytes_traced,
+ (flags & STACKSHOT_SET_MICROSTACKSHOT_MARK) ? TRUE : FALSE);
+ *retval = (int)bytes_traced;
+ goto unlock_exit;
+ }
+
+ if (flags & STACKSHOT_GET_WINDOWED_MICROSTACKSHOTS) {
+
+ if (tracebuf_size > SANE_TRACEBUF_SIZE) {
+ error = KERN_INVALID_ARGUMENT;
+ goto unlock_exit;
+ }
+
+ bytes_traced = tracebuf_size;
+ error = telemetry_gather_windowed(tracebuf, &bytes_traced);
+ *retval = (int)bytes_traced;
+ goto unlock_exit;
+ }
+
+ if (flags & STACKSHOT_GET_BOOT_PROFILE) {
+
+ if (tracebuf_size > SANE_BOOTPROFILE_TRACEBUF_SIZE) {
+ error = KERN_INVALID_ARGUMENT;
+ goto unlock_exit;
+ }
+
+ bytes_traced = tracebuf_size;
+ error = bootprofile_gather(tracebuf, &bytes_traced);
+ *retval = (int)bytes_traced;
+ }
+
+unlock_exit:
+ STACKSHOT_SUBSYS_UNLOCK();
+exit:
+ return error;
+}
+#endif /* CONFIG_TELEMETRY */
+
+/*
+ * Return the estimated size of a stackshot based on the
+ * number of currently running threads and tasks.
+ */
+uint32_t
+get_stackshot_estsize(uint32_t prev_size_hint)
+{
+ vm_size_t thread_total;
+ vm_size_t task_total;
+ uint32_t estimated_size;
+
+ thread_total = (threads_count * sizeof(struct thread_snapshot));
+ task_total = (tasks_count * (sizeof(struct task_snapshot) + TASK_UUID_AVG_SIZE));
+
+ estimated_size = (uint32_t) VM_MAP_ROUND_PAGE((thread_total + task_total + STACKSHOT_SUPP_SIZE), PAGE_MASK);
+ if (estimated_size < prev_size_hint) {
+ estimated_size = (uint32_t) VM_MAP_ROUND_PAGE(prev_size_hint, PAGE_MASK);
+ }
+
+ return estimated_size;
+}
+
+/*
+ * stackshot_remap_buffer: Utility function to remap bytes_traced bytes starting at stackshotbuf
+ * into the current task's user space and subsequently copy out the address
+ * at which the buffer has been mapped in user space to out_buffer_addr.
+ *
+ * Inputs: stackshotbuf - pointer to the original buffer in the kernel's address space
+ * bytes_traced - length of the buffer to remap starting from stackshotbuf
+ * out_buffer_addr - pointer to placeholder where newly mapped buffer will be mapped.
+ * out_size_addr - pointer to be filled in with the size of the buffer
+ *
+ * Outputs: ENOSPC if there is not enough free space in the task's address space to remap the buffer
+ * EINVAL for all other errors returned by task_remap_buffer/mach_vm_remap
+ * an error from copyout
+ */
+static kern_return_t
+stackshot_remap_buffer(void *stackshotbuf, uint32_t bytes_traced, uint64_t out_buffer_addr, uint64_t out_size_addr)
+{
+ int error = 0;
+ mach_vm_offset_t stackshotbuf_user_addr = (mach_vm_offset_t)NULL;
+ vm_prot_t cur_prot, max_prot;
+
+ error = mach_vm_remap(get_task_map(current_task()), &stackshotbuf_user_addr, bytes_traced, 0,
+ VM_FLAGS_ANYWHERE, kernel_map, (mach_vm_offset_t)stackshotbuf, FALSE, &cur_prot, &max_prot, VM_INHERIT_DEFAULT);
+ /*
+ * If the call to mach_vm_remap fails, we return the appropriate converted error
+ */
+ if (error == KERN_SUCCESS) {
+ /*
+ * If we fail to copy out the address or size of the new buffer, we remove the buffer mapping that
+ * we just made in the task's user space.
+ */
+ error = copyout(CAST_DOWN(void *, &stackshotbuf_user_addr), (user_addr_t)out_buffer_addr, sizeof(stackshotbuf_user_addr));
+ if (error != KERN_SUCCESS) {
+ mach_vm_deallocate(get_task_map(current_task()), stackshotbuf_user_addr, (mach_vm_size_t)bytes_traced);
+ return error;
+ }
+ error = copyout(&bytes_traced, (user_addr_t)out_size_addr, sizeof(bytes_traced));
+ if (error != KERN_SUCCESS) {
+ mach_vm_deallocate(get_task_map(current_task()), stackshotbuf_user_addr, (mach_vm_size_t)bytes_traced);
+ return error;
+ }
+ }
+ return error;
+}
+
+kern_return_t
+kern_stack_snapshot_internal(int stackshot_config_version, void *stackshot_config, size_t stackshot_config_size, boolean_t stackshot_from_user)
+{
+ int error = 0;
+ boolean_t prev_interrupt_state;
+ uint32_t bytes_traced = 0;
+ uint32_t stackshotbuf_size = 0;
+ void * stackshotbuf = NULL;
+ kcdata_descriptor_t kcdata_p = NULL;
+
+ void * buf_to_free = NULL;
+ int size_to_free = 0;
+
+ /* Parsed arguments */
+ uint64_t out_buffer_addr;
+ uint64_t out_size_addr;
+ int pid = -1;
+ uint32_t flags;
+ uint64_t since_timestamp;
+ boolean_t enable_faulting = FALSE;
+ uint32_t size_hint = 0;
+
+ if(stackshot_config == NULL) {
+ return KERN_INVALID_ARGUMENT;
+ }
+
+ switch (stackshot_config_version) {
+ case STACKSHOT_CONFIG_TYPE:
+ if (stackshot_config_size != sizeof(stackshot_config_t)) {
+ return KERN_INVALID_ARGUMENT;
+ }
+ stackshot_config_t *config = (stackshot_config_t *) stackshot_config;
+ out_buffer_addr = config->sc_out_buffer_addr;
+ out_size_addr = config->sc_out_size_addr;
+ pid = config->sc_pid;
+ flags = config->sc_flags;
+ since_timestamp = config->sc_since_timestamp;
+ if (config->sc_size <= SANE_TRACEBUF_SIZE) {
+ size_hint = config->sc_size;
+ }
+ break;
+ default:
+ return KERN_NOT_SUPPORTED;
+ }
+
+ /*
+ * Currently saving a kernel buffer is only supported from the internal/KEXT API.
+ */
+ if (stackshot_from_user) {
+ if (flags & STACKSHOT_SAVE_IN_KERNEL_BUFFER) {
+ return KERN_NO_ACCESS;
+ }
+ } else {
+ if (!(flags & STACKSHOT_SAVE_IN_KERNEL_BUFFER)) {
+ return KERN_NOT_SUPPORTED;
+ }
+ }
+
+ if (flags & STACKSHOT_ENABLE_FAULTING) {
+ return KERN_NOT_SUPPORTED;
+ }
+
+ /*
+ * If we're not saving the buffer in the kernel pointer, we need places to copy into.
+ */
+ if ((!out_buffer_addr || !out_size_addr) && !(flags & STACKSHOT_SAVE_IN_KERNEL_BUFFER)) {
+ return KERN_INVALID_ARGUMENT;
+ }
+
+ if (since_timestamp != 0) {
+ return KERN_NOT_SUPPORTED;
+ }
+
+ STACKSHOT_SUBSYS_LOCK();
+
+ if (flags & STACKSHOT_SAVE_IN_KERNEL_BUFFER) {
+ /*
+ * Don't overwrite an existing stackshot
+ */
+ if (kernel_stackshot_buf != NULL) {
+ error = KERN_MEMORY_PRESENT;
+ goto error_exit;
+ }
+ } else if (flags & STACKSHOT_RETRIEVE_EXISTING_BUFFER) {
+ if ((kernel_stackshot_buf == NULL) || (kernel_stackshot_buf_size <= 0)) {
+ error = KERN_NOT_IN_SET;
+ goto error_exit;
+ }
+ error = stackshot_remap_buffer(kernel_stackshot_buf, kernel_stackshot_buf_size,
+ out_buffer_addr, out_size_addr);
+ /*
+ * If we successfully remapped the buffer into the user's address space, we
+ * set buf_to_free and size_to_free so the prior kernel mapping will be removed
+ * and then clear the kernel stackshot pointer and associated size.
+ */
+ if (error == KERN_SUCCESS) {
+ buf_to_free = kernel_stackshot_buf;
+ size_to_free = (int) VM_MAP_ROUND_PAGE(kernel_stackshot_buf_size, PAGE_MASK);
+ kernel_stackshot_buf = NULL;
+ kernel_stackshot_buf_size = 0;
+ }
+
+ goto error_exit;
+ }
+
+ stackshotbuf_size = get_stackshot_estsize(size_hint);
+
+ for (; stackshotbuf_size <= SANE_TRACEBUF_SIZE; stackshotbuf_size <<= 1) {
+ if (kmem_alloc(kernel_map, (vm_offset_t *)&stackshotbuf, stackshotbuf_size, VM_KERN_MEMORY_DIAG) != KERN_SUCCESS) {
+ error = KERN_RESOURCE_SHORTAGE;
+ goto error_exit;
+ }
+
+ /*
+ * If someone has panicked, don't try and enter the debugger
+ */
+ if (panic_active()) {
+ error = KERN_RESOURCE_SHORTAGE;
+ goto error_exit;
+ }
+
+ if (flags & STACKSHOT_KCDATA_FORMAT) {
+ kcdata_p = kcdata_memory_alloc_init((mach_vm_address_t)stackshotbuf, KCDATA_BUFFER_BEGIN_STACKSHOT, stackshotbuf_size, KCFLAG_USE_MEMCOPY);
+ }
+
+
+ /*
+ * Disable interrupts and save the current interrupt state.
+ */
+ prev_interrupt_state = ml_set_interrupts_enabled(FALSE);
+
+ /*
+ * Load stackshot parameters.
+ */
+ kdp_snapshot_preflight(pid, stackshotbuf, stackshotbuf_size, flags, kcdata_p, enable_faulting);
+
+ /*
+ * Trap to the debugger to obtain a stackshot (this will populate the buffer).
+ */
+ TRAP_DEBUGGER;
+
+ ml_set_interrupts_enabled(prev_interrupt_state);
+
+ /*
+ * If we didn't allocate a big enough buffer, deallocate and try again.
+ */
+ error = kdp_stack_snapshot_geterror();
+ if (error == -1) {
+ if (kcdata_p != NULL) {
+ kcdata_memory_destroy(kcdata_p);
+ kcdata_p = NULL;
+ stackshot_kcdata_p = NULL;
+ }
+ kmem_free(kernel_map, (vm_offset_t)stackshotbuf, stackshotbuf_size);
+ stackshotbuf = NULL;
+ continue;
+ }
+
+ bytes_traced = kdp_stack_snapshot_bytes_traced();
+
+ if (bytes_traced <= 0) {
+ error = KERN_NOT_IN_SET;
+ goto error_exit;
+ }
+
+ assert(bytes_traced <= stackshotbuf_size);
+ if (!(flags & STACKSHOT_SAVE_IN_KERNEL_BUFFER)) {
+ error = stackshot_remap_buffer(stackshotbuf, bytes_traced, out_buffer_addr, out_size_addr);
+ goto error_exit;
+ }
+
+ /*
+ * Save the stackshot in the kernel buffer.
+ */
+ kernel_stackshot_buf = stackshotbuf;
+ kernel_stackshot_buf_size = bytes_traced;
+ /*
+ * Figure out if we didn't use all the pages in the buffer. If so, we set buf_to_free to the beginning of
+ * the next page after the end of the stackshot in the buffer so that the kmem_free clips the buffer and
+ * update size_to_free for kmem_free accordingly.
+ */
+ size_to_free = stackshotbuf_size - (int) VM_MAP_ROUND_PAGE(bytes_traced, PAGE_MASK);
+
+ assert(size_to_free >= 0);
+
+ if (size_to_free != 0) {
+ buf_to_free = (void *)((uint64_t)stackshotbuf + stackshotbuf_size - size_to_free);
+ }
+
+ stackshotbuf = NULL;
+ stackshotbuf_size = 0;
+ goto error_exit;
+ }
+
+ if (stackshotbuf_size > SANE_TRACEBUF_SIZE) {
+ error = KERN_RESOURCE_SHORTAGE;
+ }
+
+error_exit:
+ if (kcdata_p != NULL) {
+ kcdata_memory_destroy(kcdata_p);
+ kcdata_p = NULL;
+ stackshot_kcdata_p = NULL;
+ }
+
+ if (stackshotbuf != NULL) {
+ kmem_free(kernel_map, (vm_offset_t)stackshotbuf, stackshotbuf_size);
+ }
+ if (buf_to_free != NULL) {
+ kmem_free(kernel_map, (vm_offset_t)buf_to_free, size_to_free);
+ }
+ STACKSHOT_SUBSYS_UNLOCK();
+ return error;
+}
+
/* Cache stack snapshot parameters in preparation for a trace */
void
-kdp_snapshot_preflight(int pid, void * tracebuf, uint32_t tracebuf_size, uint32_t flags, uint32_t dispatch_offset)
+kdp_snapshot_preflight(int pid, void * tracebuf, uint32_t tracebuf_size, uint32_t flags,
+ kcdata_descriptor_t data_p, boolean_t enable_faulting)
{
stack_snapshot_pid = pid;
stack_snapshot_buf = tracebuf;
stack_snapshot_bufsize = tracebuf_size;
stack_snapshot_flags = flags;
- stack_snapshot_dispatch_offset = dispatch_offset;
+ stack_enable_faulting = enable_faulting;
+ if (data_p != NULL) {
+ stackshot_kcdata_p = data_p;
+ }
kdp_snapshot++;
/* Mark this debugger as active, since the polled mode driver that
* ordinarily does this may not be enabled (yet), or since KDB may be
return stack_snapshot_ret;
}
-int
+uint32_t
kdp_stack_snapshot_bytes_traced(void)
{
return stack_snapshot_bytes_traced;
}
+static boolean_t memory_iszero(void *addr, size_t size)
+{
+ char *data = (char *)addr;
+ for (size_t i = 0; i < size; i++){
+ if (data[i] != 0)
+ return FALSE;
+ }
+ return TRUE;
+}
+
static int
-kdp_stackshot(int pid, void *tracebuf, uint32_t tracebuf_size, uint32_t trace_flags, uint32_t dispatch_offset, uint32_t *pbytesTraced)
+kdp_stackshot_kcdata_format(int pid, uint32_t trace_flags, uint32_t *pBytesTraced)
+{
+ /* convenience macros specific only for this function */
+#define kcd_end_address(kcd) ((void *)((uint64_t)((kcd)->kcd_addr_begin) + kcdata_memory_get_used_bytes((kcd))))
+#define kcd_max_address(kcd) ((void *)((kcd)->kcd_addr_begin + (kcd)->kcd_length))
+#define kcd_exit_on_error(action) \
+ do { \
+ if (KERN_SUCCESS != (error = (action))) { \
+ if (error == KERN_RESOURCE_SHORTAGE) { \
+ error = -1; \
+ } \
+ goto error_exit; \
+ } \
+ } while (0); /* end kcd_exit_on_error */
+
+ int error = 0;
+ mach_vm_address_t out_addr = 0;
+ uint64_t abs_time;
+ struct task_snapshot_v2 *cur_tsnap;
+ uint64_t system_state_flags = 0;
+ int saved_count = 0;
+ task_t task = TASK_NULL;
+ thread_t thread = THREAD_NULL;
+ mach_timebase_info_data_t timebase = {0, 0};
+ uint64_t microsecs = 0, secs = 0;
+ uint32_t length_to_copy, tmp32;
+
+ abs_time = mach_absolute_time();
+ clock_get_calendar_microtime((clock_sec_t*)&secs, (clock_usec_t*)µsecs);
+
+ /* process the flags */
+ boolean_t dispatch_p = ((trace_flags & STACKSHOT_GET_DQ) != 0);
+ boolean_t save_loadinfo_p = ((trace_flags & STACKSHOT_SAVE_LOADINFO) != 0);
+ boolean_t save_kextloadinfo_p = ((trace_flags & STACKSHOT_SAVE_KEXT_LOADINFO) != 0);
+ boolean_t save_userframes_p = ((trace_flags & STACKSHOT_SAVE_KERNEL_FRAMES_ONLY) == 0);
+ boolean_t save_donating_pids_p = ((trace_flags & STACKSHOT_SAVE_IMP_DONATION_PIDS) != 0);
+
+ if (sizeof(void *) == 8)
+ system_state_flags |= kKernel64_p;
+
+ if (stackshot_kcdata_p == NULL || pBytesTraced == NULL) {
+ error = -1;
+ goto error_exit;
+ }
+
+ /* begin saving data into the buffer */
+ *pBytesTraced = 0;
+ kcd_exit_on_error(kcdata_add_uint32_with_description(stackshot_kcdata_p, trace_flags, "stackshot_in_flags"));
+ kcd_exit_on_error(kcdata_add_uint32_with_description(stackshot_kcdata_p, (uint32_t)pid, "stackshot_in_pid"));
+ kcd_exit_on_error(kcdata_add_uint64_with_description(stackshot_kcdata_p, system_state_flags, "system_state_flags"));
+ tmp32 = PAGE_SIZE;
+ kcd_exit_on_error(kcdata_get_memory_addr(stackshot_kcdata_p, STACKSHOT_KCTYPE_KERN_PAGE_SIZE, sizeof(uint32_t), &out_addr));
+ memcpy((void *)out_addr, &tmp32, sizeof(tmp32));
+
+#if CONFIG_JETSAM
+ tmp32 = memorystatus_get_pressure_status_kdp();
+ kcd_exit_on_error(kcdata_get_memory_addr(stackshot_kcdata_p, STACKSHOT_KCTYPE_JETSAM_LEVEL, sizeof(uint32_t), &out_addr));
+ memcpy((void *)out_addr, &tmp32, sizeof(tmp32));
+#endif
+
+ /* save boot-args and osversion string */
+ length_to_copy = MIN((uint32_t)(strlen(version) + 1), OSVERSIZE);
+ kcd_exit_on_error(kcdata_get_memory_addr(stackshot_kcdata_p, STACKSHOT_KCTYPE_OSVERSION, length_to_copy, &out_addr));
+ strlcpy((char*)out_addr, &version[0], length_to_copy);
+
+ length_to_copy = MIN((uint32_t)(strlen(PE_boot_args()) + 1), OSVERSIZE);
+ kcd_exit_on_error(kcdata_get_memory_addr(stackshot_kcdata_p, STACKSHOT_KCTYPE_BOOTARGS, length_to_copy, &out_addr));
+ strlcpy((char*)out_addr, PE_boot_args(), length_to_copy);
+
+ /* setup mach_absolute_time and timebase info */
+ clock_timebase_info(&timebase);
+ kcd_exit_on_error(kcdata_get_memory_addr(stackshot_kcdata_p, KCDATA_TYPE_TIMEBASE, sizeof(timebase), &out_addr));
+ memcpy((void *)out_addr, &timebase, sizeof(timebase));
+
+ kcd_exit_on_error(kcdata_get_memory_addr(stackshot_kcdata_p, KCDATA_TYPE_MACH_ABSOLUTE_TIME, sizeof(uint64_t), &out_addr));
+ memcpy((void *)out_addr, &abs_time, sizeof(uint64_t));
+
+ microsecs = microsecs + (secs * USECSPERSEC);
+ kcd_exit_on_error(kcdata_get_memory_addr(stackshot_kcdata_p, KCDATA_TYPE_USECS_SINCE_EPOCH, sizeof(uint64_t), &out_addr));
+ memcpy((void *)out_addr, µsecs, sizeof(uint64_t));
+
+ /* reserve space of system level shared cache load info */
+ struct dyld_uuid_info_64 *sys_shared_cache_loadinfo;
+ kcd_exit_on_error(kcdata_get_memory_addr(stackshot_kcdata_p, STACKSHOT_KCTYPE_SHAREDCACHE_LOADINFO, sizeof(kernel_uuid_info), &out_addr));
+ sys_shared_cache_loadinfo = (struct dyld_uuid_info_64 *)out_addr;
+ bzero((void *)sys_shared_cache_loadinfo, sizeof(struct dyld_uuid_info_64));
+
+ /* Add requested information first */
+ if (trace_flags & STACKSHOT_GET_GLOBAL_MEM_STATS) {
+ kcd_exit_on_error(kcdata_get_memory_addr(stackshot_kcdata_p, STACKSHOT_KCTYPE_GLOBAL_MEM_STATS, sizeof(struct mem_and_io_snapshot), &out_addr));
+ kdp_mem_and_io_snapshot((struct mem_and_io_snapshot *)out_addr);
+ }
+
+ /* Iterate over tasks */
+ queue_head_t *task_list = &tasks;
+ queue_iterate(task_list, task, task_t, tasks) {
+ int task_pid;
+ if ((task == NULL) || !ml_validate_nofault((vm_offset_t) task, sizeof(struct task)))
+ goto error_exit;
+
+ task_pid = pid_from_task(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)) {
+
+ uint64_t task_uniqueid = proc_uniqueid_from_task(task);
+ boolean_t task64 = task_has_64BitAddr(task);
+ boolean_t have_map = (task->map != NULL) && (ml_validate_nofault((vm_offset_t)(task->map), sizeof(struct _vm_map)));
+ boolean_t have_pmap = have_map && (task->map->pmap != NULL) && (ml_validate_nofault((vm_offset_t)(task->map->pmap), sizeof(struct pmap)));
+
+ /* add task snapshot marker */
+ kcd_exit_on_error(kcdata_add_container_marker(stackshot_kcdata_p, KCDATA_TYPE_CONTAINER_BEGIN, STACKSHOT_KCCONTAINER_TASK, task_uniqueid));
+
+ /* add task_snapshot_v2 struct data */
+ kcd_exit_on_error(kcdata_get_memory_addr(stackshot_kcdata_p, STACKSHOT_KCTYPE_TASK_SNAPSHOT, sizeof(struct task_snapshot_v2), &out_addr));
+ cur_tsnap = (struct task_snapshot_v2 *)out_addr;
+ bzero(cur_tsnap, sizeof(struct task_snapshot_v2));
+
+ cur_tsnap->ts_pid = task_pid;
+ cur_tsnap->ts_unique_pid = task_uniqueid;
+
+ /* Add the BSD process identifiers */
+ if (task_pid != -1 && task->bsd_info != NULL)
+ proc_name_kdp(task, cur_tsnap->ts_p_comm, sizeof(cur_tsnap->ts_p_comm));
+ else {
+ cur_tsnap->ts_p_comm[0] = '\0';
+#if IMPORTANCE_INHERITANCE && (DEVELOPMENT || DEBUG)
+ if (task->task_imp_base != NULL) {
+ strlcpy(cur_tsnap->ts_p_comm, &task->task_imp_base->iit_procname[0],
+ MIN((int)sizeof(task->task_imp_base->iit_procname), (int)sizeof(cur_tsnap->ts_p_comm)));
+ }
+#endif
+ }
+
+ if (task64)
+ cur_tsnap->ts_ss_flags |= kUser64_p;
+ if (!task->active || task_is_a_corpse(task))
+ cur_tsnap->ts_ss_flags |= kTerminatedSnapshot;
+ if (task->pidsuspended)
+ cur_tsnap->ts_ss_flags |= kPidSuspended;
+ if (task->frozen)
+ cur_tsnap->ts_ss_flags |= kFrozen;
+ if (task->effective_policy.darwinbg == 1)
+ cur_tsnap->ts_ss_flags |= kTaskDarwinBG;
+ if (task->requested_policy.t_role == TASK_FOREGROUND_APPLICATION)
+ cur_tsnap->ts_ss_flags |= kTaskIsForeground;
+ if (task->requested_policy.t_boosted == 1)
+ cur_tsnap->ts_ss_flags |= kTaskIsBoosted;
+ if (task->effective_policy.t_sup_active == 1)
+ cur_tsnap->ts_ss_flags |= kTaskIsSuppressed;
+
+#if IMPORTANCE_INHERITANCE
+ if (task->task_imp_base) {
+ if (task->task_imp_base->iit_donor)
+ cur_tsnap->ts_ss_flags |= kTaskIsImpDonor;
+ if (task->task_imp_base->iit_live_donor)
+ cur_tsnap->ts_ss_flags |= kTaskIsLiveImpDonor;
+ }
+#endif
+
+ cur_tsnap->ts_latency_qos = (task->effective_policy.t_latency_qos == LATENCY_QOS_TIER_UNSPECIFIED) ?
+ LATENCY_QOS_TIER_UNSPECIFIED : ((0xFF << 16) | task->effective_policy.t_latency_qos);
+ cur_tsnap->ts_suspend_count = task->suspend_count;
+ cur_tsnap->ts_p_start_sec = 0;
+ proc_starttime_kdp(task->bsd_info, &cur_tsnap->ts_p_start_sec, NULL);
+
+ cur_tsnap->ts_task_size = have_pmap ? (pmap_resident_count(task->map->pmap) * PAGE_SIZE) : 0;
+ cur_tsnap->ts_max_resident_size = get_task_resident_max(task);
+ cur_tsnap->ts_faults = task->faults;
+ cur_tsnap->ts_pageins = task->pageins;
+ cur_tsnap->ts_cow_faults = task->cow_faults;
+ cur_tsnap->ts_user_time_in_terminated_threads = task->total_user_time;
+ cur_tsnap->ts_system_time_in_terminated_threads = task->total_system_time;
+ cur_tsnap->ts_was_throttled = (uint32_t) proc_was_throttled_from_task(task);
+ cur_tsnap->ts_did_throttle = (uint32_t) proc_did_throttle_from_task(task);
+
+ /* Check for shared cache information */
+ do {
+ uint8_t shared_cache_identifier[16];
+ uint64_t shared_cache_slide;
+ uint64_t shared_cache_base_address = 0;
+ boolean_t found_shared_cache_info = TRUE;
+
+ if (task->shared_region && ml_validate_nofault((vm_offset_t)task->shared_region, sizeof(struct vm_shared_region))) {
+ struct vm_shared_region *sr = task->shared_region;
+ shared_cache_base_address = sr->sr_base_address + sr->sr_first_mapping;
+ }
+
+ if (!shared_cache_base_address ||
+ !kdp_copyin(task->map->pmap, shared_cache_base_address + offsetof(struct _dyld_cache_header, uuid), shared_cache_identifier, sizeof(shared_cache_identifier))
+ ) {
+ found_shared_cache_info = FALSE;
+ }
+
+ if (task->shared_region) {
+ /*
+ * No refcounting here, but we are in debugger
+ * context, so that should be safe.
+ */
+ shared_cache_slide = task->shared_region->sr_slide_info.slide;
+ } else {
+ shared_cache_slide = 0;
+ }
+
+ if (found_shared_cache_info == FALSE)
+ break;
+
+ if (task_pid == 1) {
+ /* save launchd's shared cache info as system level */
+ bcopy(shared_cache_identifier, sys_shared_cache_loadinfo->imageUUID, sizeof(sys_shared_cache_loadinfo->imageUUID));
+ sys_shared_cache_loadinfo->imageLoadAddress = shared_cache_slide;
+ break;
+ } else {
+ if (shared_cache_slide == sys_shared_cache_loadinfo->imageLoadAddress &&
+ 0 == memcmp(shared_cache_identifier, sys_shared_cache_loadinfo->imageUUID, sizeof(sys_shared_cache_loadinfo->imageUUID))) {
+ /* skip adding shared cache info. its same as system level one */
+ break;
+ }
+ }
+
+ kcd_exit_on_error(kcdata_get_memory_addr(stackshot_kcdata_p, STACKSHOT_KCTYPE_SHAREDCACHE_LOADINFO, sizeof(struct dyld_uuid_info_64), &out_addr));
+ struct dyld_uuid_info_64 *shared_cache_data = (struct dyld_uuid_info_64 *)out_addr;
+ shared_cache_data->imageLoadAddress = shared_cache_slide;
+ bcopy(shared_cache_identifier, shared_cache_data->imageUUID, sizeof(shared_cache_data->imageUUID));
+
+ } while(0);
+
+ /* I/O Statistics if any counters are non zero */
+ assert(IO_NUM_PRIORITIES == STACKSHOT_IO_NUM_PRIORITIES);
+ if (task->task_io_stats && !memory_iszero(task->task_io_stats, sizeof(struct io_stat_info))) {
+ kcd_exit_on_error(kcdata_get_memory_addr(stackshot_kcdata_p, STACKSHOT_KCTYPE_IOSTATS, sizeof(struct io_stats_snapshot), &out_addr));
+ struct io_stats_snapshot *_iostat = (struct io_stats_snapshot *)out_addr;
+ _iostat->ss_disk_reads_count = task->task_io_stats->disk_reads.count;
+ _iostat->ss_disk_reads_size = task->task_io_stats->disk_reads.size;
+ _iostat->ss_disk_writes_count = (task->task_io_stats->total_io.count - task->task_io_stats->disk_reads.count);
+ _iostat->ss_disk_writes_size = (task->task_io_stats->total_io.size - task->task_io_stats->disk_reads.size);
+ _iostat->ss_paging_count = task->task_io_stats->paging.count;
+ _iostat->ss_paging_size = task->task_io_stats->paging.size;
+ _iostat->ss_non_paging_count = (task->task_io_stats->total_io.count - task->task_io_stats->paging.count);
+ _iostat->ss_non_paging_size = (task->task_io_stats->total_io.size - task->task_io_stats->paging.size);
+ _iostat->ss_metadata_count = task->task_io_stats->metadata.count;
+ _iostat->ss_metadata_size = task->task_io_stats->metadata.size;
+ _iostat->ss_data_count = (task->task_io_stats->total_io.count - task->task_io_stats->metadata.count);
+ _iostat->ss_data_size = (task->task_io_stats->total_io.size - task->task_io_stats->metadata.size);
+ for(int i = 0; i < IO_NUM_PRIORITIES; i++) {
+ _iostat->ss_io_priority_count[i] = task->task_io_stats->io_priority[i].count;
+ _iostat->ss_io_priority_size[i] = task->task_io_stats->io_priority[i].size;
+ }
+ }
+
+#if IMPORTANCE_INHERITANCE
+ if (save_donating_pids_p) {
+ kcd_exit_on_error(((((mach_vm_address_t) kcd_end_address(stackshot_kcdata_p) + (TASK_IMP_WALK_LIMIT * sizeof(int32_t)))
+ < (mach_vm_address_t) kcd_max_address(stackshot_kcdata_p)) ? KERN_SUCCESS : KERN_RESOURCE_SHORTAGE));
+ saved_count = task_importance_list_pids(task, TASK_IMP_LIST_DONATING_PIDS, (void *)kcd_end_address(stackshot_kcdata_p), TASK_IMP_WALK_LIMIT);
+ if (saved_count > 0)
+ kcd_exit_on_error(kcdata_get_memory_addr_for_array(stackshot_kcdata_p, STASKSHOT_KCTYPE_DONATING_PIDS, sizeof(int32_t), saved_count, &out_addr));
+ }
+#endif
+
+ /* place load info and libraries now */
+ uint32_t uuid_info_count = 0;
+ mach_vm_address_t uuid_info_addr = 0;
+ if (save_loadinfo_p && have_pmap && task->active && task_pid > 0) {
+ /* Read the dyld_all_image_infos struct from the task memory to get UUID array count and location */
+ if (task64) {
+ 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 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;
+ }
+ }
+
+ if (have_pmap && task_pid == 0) {
+ if (save_kextloadinfo_p && ml_validate_nofault((vm_offset_t)(gLoadedKextSummaries), sizeof(OSKextLoadedKextSummaryHeader))) {
+ uuid_info_count = gLoadedKextSummaries->numSummaries + 1; /* include main kernel UUID */
+ } else {
+ uuid_info_count = 1; /* atleast include kernel uuid */
+ }
+ }
+
+ if (task_pid > 0 && uuid_info_count > 0 && uuid_info_count < MAX_LOADINFOS) {
+ 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;
+
+ kcd_exit_on_error(kcdata_get_memory_addr_for_array(stackshot_kcdata_p,
+ (task64 ? KCDATA_TYPE_LIBRARY_LOADINFO64 : KCDATA_TYPE_LIBRARY_LOADINFO),
+ uuid_info_size,
+ uuid_info_count,
+ &out_addr));
+
+
+ /* Copy in the UUID info array
+ * 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, (void *)out_addr, uuid_info_array_size)) {
+ bzero((void *)out_addr, uuid_info_array_size);
+ }
+
+ } else if (task_pid == 0 && uuid_info_count > 0 && uuid_info_count < MAX_LOADINFOS) {
+ uintptr_t image_load_address;
+
+ do {
+ if (!kernel_uuid || !ml_validate_nofault((vm_offset_t)kernel_uuid, sizeof(uuid_t))) {
+ /* Kernel UUID not found or inaccessible */
+ break;
+ }
+ kcd_exit_on_error(kcdata_get_memory_addr_for_array(stackshot_kcdata_p,
+ (sizeof(kernel_uuid_info) == sizeof(struct user64_dyld_uuid_info))? KCDATA_TYPE_LIBRARY_LOADINFO64: KCDATA_TYPE_LIBRARY_LOADINFO,
+ sizeof(kernel_uuid_info), uuid_info_count, &out_addr)
+ );
+ kernel_uuid_info *uuid_info_array = (kernel_uuid_info *)out_addr;
+ image_load_address = (uintptr_t)VM_KERNEL_UNSLIDE(vm_kernel_stext);
+ uuid_info_array[0].imageLoadAddress = image_load_address;
+ memcpy(&uuid_info_array[0].imageUUID, kernel_uuid, sizeof(uuid_t));
+
+ if (save_kextloadinfo_p && ml_validate_nofault((vm_offset_t)(&gLoadedKextSummaries->summaries[0]),
+ gLoadedKextSummaries->entry_size * gLoadedKextSummaries->numSummaries)) {
+ uint32_t kexti;
+ for (kexti=0 ; kexti < gLoadedKextSummaries->numSummaries; kexti++) {
+ image_load_address = (uintptr_t)VM_KERNEL_UNSLIDE(gLoadedKextSummaries->summaries[kexti].address);
+ uuid_info_array[kexti + 1].imageLoadAddress = image_load_address;
+ memcpy(&uuid_info_array[kexti + 1].imageUUID, &gLoadedKextSummaries->summaries[kexti].uuid, sizeof(uuid_t));
+ }
+ }
+ } while(0);
+ }
+
+ /* Iterate over task threads */
+ queue_iterate(&task->threads, thread, thread_t, task_threads){
+ uint64_t tval;
+ uint64_t thread_uniqueid = 0;
+ char cur_thread_name[STACKSHOT_MAX_THREAD_NAME_SIZE];
+
+ if ((thread == NULL) || !ml_validate_nofault((vm_offset_t) thread, sizeof(struct thread)))
+ goto error_exit;
+
+ if (!save_userframes_p && thread->kernel_stack == 0)
+ continue;
+
+ thread_uniqueid = thread_tid(thread);
+
+ /* add thread marker */
+ kcd_exit_on_error(kcdata_add_container_marker(stackshot_kcdata_p, KCDATA_TYPE_CONTAINER_BEGIN, STACKSHOT_KCCONTAINER_THREAD, thread_uniqueid));
+ kcd_exit_on_error(kcdata_get_memory_addr(stackshot_kcdata_p, STACKSHOT_KCTYPE_THREAD_SNAPSHOT, sizeof(struct thread_snapshot_v2), &out_addr));
+ struct thread_snapshot_v2 * cur_thread_snap = (struct thread_snapshot_v2 *)out_addr;
+
+ /* Populate the thread snapshot header */
+ cur_thread_snap->ths_thread_id = thread_uniqueid;
+ cur_thread_snap->ths_state = thread->state;
+ cur_thread_snap->ths_ss_flags = 0;
+ cur_thread_snap->ths_base_priority = thread->base_pri;
+ cur_thread_snap->ths_sched_priority = thread->sched_pri;
+ cur_thread_snap->ths_sched_flags = thread->sched_flags;
+ cur_thread_snap->ths_wait_event = VM_KERNEL_UNSLIDE_OR_PERM(thread->wait_event);
+ cur_thread_snap->ths_continuation = VM_KERNEL_UNSLIDE(thread->continuation);
+ cur_thread_snap->ths_last_run_time = thread->last_run_time;
+ cur_thread_snap->ths_last_made_runnable_time = thread->last_made_runnable_time;
+ cur_thread_snap->ths_io_tier = proc_get_effective_thread_policy(thread, TASK_POLICY_IO);
+ cur_thread_snap->ths_eqos = thread->effective_policy.thep_qos;
+ cur_thread_snap->ths_rqos = thread->requested_policy.thrp_qos;
+ cur_thread_snap->ths_rqos_override = thread->requested_policy.thrp_qos_override;
+ cur_thread_snap->ths_total_syscalls = thread->syscalls_mach + thread->syscalls_unix;
+ cur_thread_snap->ths_dqserialnum = 0;
+
+ tval = safe_grab_timer_value(&thread->user_timer);
+ cur_thread_snap->ths_user_time = tval;
+ tval = safe_grab_timer_value(&thread->system_timer);
+
+ if (thread->precise_user_kernel_time) {
+ cur_thread_snap->ths_sys_time = tval;
+ } else {
+ cur_thread_snap->ths_user_time += tval;
+ cur_thread_snap->ths_sys_time = 0;
+ }
+
+ if (thread->effective_policy.darwinbg)
+ cur_thread_snap->ths_ss_flags |= kThreadDarwinBG;
+ if (proc_get_effective_thread_policy(thread, TASK_POLICY_PASSIVE_IO))
+ cur_thread_snap->ths_ss_flags |= kThreadIOPassive;
+ if (thread->suspend_count > 0)
+ cur_thread_snap->ths_ss_flags |= kThreadSuspended;
+
+ if (thread->options & TH_OPT_GLOBAL_FORCED_IDLE) {
+ cur_thread_snap->ths_ss_flags |= kGlobalForcedIdle;
+ }
+
+ if (IPC_VOUCHER_NULL != thread->ith_voucher)
+ cur_thread_snap->ths_voucher_identifier = VM_KERNEL_ADDRPERM(thread->ith_voucher);
+ if (dispatch_p && (task != kernel_task) && (task->active) && have_pmap) {
+ uint64_t dqkeyaddr = thread_dispatchqaddr(thread);
+ if (dqkeyaddr != 0) {
+ uint64_t dqaddr = 0;
+ if (kdp_copyin(task->map->pmap, dqkeyaddr, &dqaddr, (task64 ? 8 : 4)) && (dqaddr != 0)) {
+ uint64_t dqserialnumaddr = dqaddr + proc_dispatchqueue_serialno_offset_from_task(task);
+ uint64_t dqserialnum = 0;
+ if (kdp_copyin(task->map->pmap, dqserialnumaddr, &dqserialnum, (task64 ? 8 : 4))) {
+ cur_thread_snap->ths_ss_flags |= kHasDispatchSerial;
+ cur_thread_snap->ths_dqserialnum = dqserialnum;
+ }
+ }
+ }
+ }
+
+ /* if there is thread name then add to buffer */
+ cur_thread_name[0] = '\0';
+ proc_threadname_kdp(thread->uthread, cur_thread_name, STACKSHOT_MAX_THREAD_NAME_SIZE);
+ if (strnlen(cur_thread_name, STACKSHOT_MAX_THREAD_NAME_SIZE) > 0) {
+ kcd_exit_on_error(kcdata_get_memory_addr(stackshot_kcdata_p, STACKSHOT_KCTYPE_THREAD_NAME, sizeof(cur_thread_name), &out_addr));
+ bcopy((void *)cur_thread_name, (void *)out_addr, sizeof(cur_thread_name));
+ }
+
+ /* I/O Statistics */
+ assert(IO_NUM_PRIORITIES == STACKSHOT_IO_NUM_PRIORITIES);
+ if (thread->thread_io_stats && !memory_iszero(thread->thread_io_stats, sizeof(struct io_stat_info))) {
+ kcd_exit_on_error(kcdata_get_memory_addr(stackshot_kcdata_p, STACKSHOT_KCTYPE_IOSTATS, sizeof(struct io_stats_snapshot), &out_addr));
+ struct io_stats_snapshot *_iostat = (struct io_stats_snapshot *)out_addr;
+ _iostat->ss_disk_reads_count = thread->thread_io_stats->disk_reads.count;
+ _iostat->ss_disk_reads_size = thread->thread_io_stats->disk_reads.size;
+ _iostat->ss_disk_writes_count = (thread->thread_io_stats->total_io.count - thread->thread_io_stats->disk_reads.count);
+ _iostat->ss_disk_writes_size = (thread->thread_io_stats->total_io.size - thread->thread_io_stats->disk_reads.size);
+ _iostat->ss_paging_count = thread->thread_io_stats->paging.count;
+ _iostat->ss_paging_size = thread->thread_io_stats->paging.size;
+ _iostat->ss_non_paging_count = (thread->thread_io_stats->total_io.count - thread->thread_io_stats->paging.count);
+ _iostat->ss_non_paging_size = (thread->thread_io_stats->total_io.size - thread->thread_io_stats->paging.size);
+ _iostat->ss_metadata_count = thread->thread_io_stats->metadata.count;
+ _iostat->ss_metadata_size = thread->thread_io_stats->metadata.size;
+ _iostat->ss_data_count = (thread->thread_io_stats->total_io.count - thread->thread_io_stats->metadata.count);
+ _iostat->ss_data_size = (thread->thread_io_stats->total_io.size - thread->thread_io_stats->metadata.size);
+ for(int i = 0; i < IO_NUM_PRIORITIES; i++) {
+ _iostat->ss_io_priority_count[i] = thread->thread_io_stats->io_priority[i].count;
+ _iostat->ss_io_priority_size[i] = thread->thread_io_stats->io_priority[i].size;
+ }
+ }
+
+ /* Trace user stack, if any */
+ if (save_userframes_p && task->active && thread->task->map != kernel_map) {
+ uint32_t thread_snapshot_flags = 0;
+ /* 64-bit task? */
+ if (task_has_64BitAddr(thread->task)) {
+ out_addr = (mach_vm_address_t)kcd_end_address(stackshot_kcdata_p);
+ saved_count = machine_trace_thread64(thread, (char *)out_addr, (char *)kcd_max_address(stackshot_kcdata_p), MAX_FRAMES, TRUE, &thread_snapshot_flags);
+ if (saved_count > 0) {
+ kcd_exit_on_error(kcdata_get_memory_addr_for_array(stackshot_kcdata_p,
+ STACKSHOT_KCTYPE_USER_STACKFRAME64,
+ sizeof(struct stack_snapshot_frame64),
+ saved_count/sizeof(struct stack_snapshot_frame64),
+ &out_addr));
+ cur_thread_snap->ths_ss_flags |= kUser64_p;
+ }
+ }
+ else {
+ out_addr = (mach_vm_address_t)kcd_end_address(stackshot_kcdata_p);
+ saved_count = machine_trace_thread(thread, (char *)out_addr, (char *)kcd_max_address(stackshot_kcdata_p), MAX_FRAMES, TRUE, &thread_snapshot_flags);
+ if (saved_count > 0) {
+ kcd_exit_on_error(kcdata_get_memory_addr_for_array(stackshot_kcdata_p,
+ STACKSHOT_KCTYPE_USER_STACKFRAME,
+ sizeof(struct stack_snapshot_frame32),
+ saved_count/sizeof(struct stack_snapshot_frame32),
+ &out_addr));
+ }
+ }
+
+ if (thread_snapshot_flags != 0) {
+ cur_thread_snap->ths_ss_flags |= thread_snapshot_flags;
+ }
+ }
+
+ /* Call through to the machine specific trace routines
+ * Frames are added past the snapshot header.
+ */
+ if (thread->kernel_stack != 0) {
+ uint32_t thread_snapshot_flags = 0;
+#if defined(__LP64__)
+ out_addr = (mach_vm_address_t)kcd_end_address(stackshot_kcdata_p);
+ saved_count = machine_trace_thread64(thread, (char *)out_addr, (char *)kcd_max_address(stackshot_kcdata_p), MAX_FRAMES, FALSE, &thread_snapshot_flags);
+ if (saved_count > 0){
+ cur_thread_snap->ths_ss_flags |= kKernel64_p;
+ kcd_exit_on_error(kcdata_get_memory_addr_for_array(stackshot_kcdata_p,
+ STACKSHOT_KCTYPE_KERN_STACKFRAME64,
+ sizeof(struct stack_snapshot_frame64),
+ saved_count/sizeof(struct stack_snapshot_frame64),
+ &out_addr));
+ }
+#else
+ out_addr = (mach_vm_address_t)kcd_end_address(stackshot_kcdata_p);
+ saved_count = machine_trace_thread(thread, (char *)out_addr, (char *)kcd_max_address(stackshot_kcdata_p), MAX_FRAMES, FALSE, &thread_snapshot_flags);
+ if (saved_count > 0) {
+ kcd_exit_on_error(kcdata_get_memory_addr_for_array(stackshot_kcdata_p,
+ STACKSHOT_KCTYPE_KERN_STACKFRAME,
+ sizeof(struct stack_snapshot_frame32),
+ saved_count/sizeof(struct stack_snapshot_frame32),
+ &out_addr));
+ }
+#endif
+ if (thread_snapshot_flags != 0) {
+ cur_thread_snap->ths_ss_flags |= thread_snapshot_flags;
+ }
+ }
+ /* mark end of thread snapshot data */
+ kcd_exit_on_error(kcdata_add_container_marker(stackshot_kcdata_p, KCDATA_TYPE_CONTAINER_END, STACKSHOT_KCCONTAINER_THREAD, thread_uniqueid));
+ }
+ /* mark end of task snapshot data */
+ kcd_exit_on_error(kcdata_add_container_marker(stackshot_kcdata_p, KCDATA_TYPE_CONTAINER_END, STACKSHOT_KCCONTAINER_TASK, task_uniqueid));
+ }
+ }
+
+ /* === END of populating stackshot data === */
+
+ *pBytesTraced = (uint32_t) kcdata_memory_get_used_bytes(stackshot_kcdata_p);
+error_exit:
+ /* Release stack snapshot wait indicator */
+ kdp_snapshot_postflight();
+
+ return error;
+}
+
+static int
+kdp_stackshot(int pid, void *tracebuf, uint32_t tracebuf_size, uint32_t trace_flags, uint32_t *pbytesTraced)
{
char *tracepos = (char *) tracebuf;
char *tracebound = tracepos + tracebuf_size;
uint64_t task_uniqueid = proc_uniqueid_from_task(task);
boolean_t task64 = task_has_64BitAddr(task);
- if (!task->active) {
- /*
+ if (!task->active || task_is_a_corpse(task)) {
+ /*
* Not interested in terminated tasks without threads, and
* at the moment, stackshot can't handle a task without a name.
*/
}
}
- if (have_pmap && save_kextloadinfo_p && task_pid == 0) {
- if (ml_validate_nofault((vm_offset_t)(gLoadedKextSummaries), sizeof(OSKextLoadedKextSummaryHeader))) {
+ if (have_pmap && task_pid == 0) {
+ if (save_kextloadinfo_p && ml_validate_nofault((vm_offset_t)(gLoadedKextSummaries), sizeof(OSKextLoadedKextSummaryHeader))) {
uuid_info_count = gLoadedKextSummaries->numSummaries + 1; /* include main kernel UUID */
+ }else {
+ uuid_info_count = 1; /* atleast include kernel uuid */
}
}
task_snap->ss_flags |= kUser64_p;
if (task64 && task_pid == 0)
task_snap->ss_flags |= kKernel64_p;
- if (!task->active)
+ if (!task->active || task_is_a_corpse(task))
task_snap->ss_flags |= kTerminatedSnapshot;
if(task->pidsuspended) task_snap->ss_flags |= kPidSuspended;
if(task->frozen) task_snap->ss_flags |= kFrozen;
} else if (task_pid == 0 && uuid_info_count > 0) {
uint32_t uuid_info_size = (uint32_t)sizeof(kernel_uuid_info);
uint32_t uuid_info_array_size = uuid_info_count * uuid_info_size;
- kernel_uuid_info *output_uuids;
+ uint32_t uuid_offset = offsetof(kernel_uuid_info, imageUUID);
+ uintptr_t image_load_address;
if (tracepos + uuid_info_array_size > tracebound) {
error = -1;
goto error_exit;
}
- output_uuids = (kernel_uuid_info *)tracepos;
-
do {
if (!kernel_uuid || !ml_validate_nofault((vm_offset_t)kernel_uuid, sizeof(uuid_t))) {
task_snap->nloadinfos = 0;
break;
}
+ image_load_address = (uintptr_t)VM_KERNEL_UNSLIDE(vm_kernel_stext);
+ memcpy(tracepos, &image_load_address, sizeof(uintptr_t));
+ memcpy((tracepos + uuid_offset), kernel_uuid, sizeof(uuid_t));
+ tracepos += uuid_info_size;
- output_uuids[0].imageLoadAddress = (uintptr_t)VM_KERNEL_UNSLIDE(vm_kernel_stext);
- memcpy(&output_uuids[0].imageUUID, kernel_uuid, sizeof(uuid_t));
-
- if (ml_validate_nofault((vm_offset_t)(&gLoadedKextSummaries->summaries[0]),
+ if (save_kextloadinfo_p && ml_validate_nofault((vm_offset_t)(&gLoadedKextSummaries->summaries[0]),
gLoadedKextSummaries->entry_size * gLoadedKextSummaries->numSummaries)) {
uint32_t kexti;
-
for (kexti=0 ; kexti < gLoadedKextSummaries->numSummaries; kexti++) {
- output_uuids[1+kexti].imageLoadAddress = (uintptr_t)VM_KERNEL_UNSLIDE(gLoadedKextSummaries->summaries[kexti].address);
- memcpy(&output_uuids[1+kexti].imageUUID, &gLoadedKextSummaries->summaries[kexti].uuid, sizeof(uuid_t));
+ image_load_address = (uintptr_t)VM_KERNEL_UNSLIDE(gLoadedKextSummaries->summaries[kexti].address);
+ memcpy(tracepos, &image_load_address, sizeof(uintptr_t));
+ memcpy((tracepos + uuid_offset), &gLoadedKextSummaries->summaries[kexti].uuid, sizeof(uuid_t));
+ tracepos += uuid_info_size;
}
-
- tracepos += uuid_info_array_size;
} else {
/* kext summary invalid, but kernel UUID was copied */
task_snap->nloadinfos = 1;
- tracepos += uuid_info_size;
break;
}
} while(0);
}
if (save_donating_pids_p) {
- task_snap->donating_pid_count = task_importance_list_pids(task, TASK_IMP_LIST_DONATING_PIDS, (int *)tracepos, (unsigned int)((tracebound - tracepos)/sizeof(int)));
+ if (tracepos + (TASK_IMP_WALK_LIMIT * sizeof(int32_t)) > tracebound) {
+ error = -1;
+ goto error_exit;
+ }
+
+ task_snap->donating_pid_count = task_importance_list_pids(task, TASK_IMP_LIST_DONATING_PIDS, tracepos, TASK_IMP_WALK_LIMIT);
tracepos += sizeof(int) * task_snap->donating_pid_count;
}
tsnap = (thread_snapshot_t) tracepos;
tsnap->thread_id = thread_tid(thread);
tsnap->state = thread->state;
- tsnap->priority = thread->priority;
+ tsnap->priority = thread->base_pri;
tsnap->sched_pri = thread->sched_pri;
tsnap->sched_flags = thread->sched_flags;
tsnap->wait_event = VM_KERNEL_UNSLIDE_OR_PERM(thread->wait_event);
if (thread->suspend_count > 0) {
tsnap->ss_flags |= kThreadSuspended;
}
+
+ if (thread->options & TH_OPT_GLOBAL_FORCED_IDLE) {
+ tsnap->ss_flags |= kGlobalForcedIdle;
+ }
+
if (IPC_VOUCHER_NULL != thread->ith_voucher) {
tsnap->voucher_identifier = VM_KERNEL_ADDRPERM(thread->ith_voucher);
}
tsnap->ts_qos = thread->effective_policy.thep_qos;
+ tsnap->ts_rqos = thread->requested_policy.thrp_qos;
+ tsnap->ts_rqos_override = thread->requested_policy.thrp_qos_override;
+ /* zero out unused data. */
+ tsnap->_reserved[0] = 0;
+ tsnap->_reserved[1] = 0;
+ tsnap->_reserved[2] = 0;
tsnap->total_syscalls = thread->syscalls_mach + thread->syscalls_unix;
if (dispatch_p && (task != kernel_task) && (task->active) && have_pmap) {
if (dqkeyaddr != 0) {
uint64_t dqaddr = 0;
if (kdp_copyin(task->map->pmap, dqkeyaddr, &dqaddr, (task64 ? 8 : 4)) && (dqaddr != 0)) {
- uint64_t dqserialnumaddr = dqaddr + dispatch_offset;
+ uint64_t dqserialnumaddr = dqaddr + proc_dispatchqueue_serialno_offset_from_task(task);
uint64_t dqserialnum = 0;
if (kdp_copyin(task->map->pmap, dqserialnumaddr, &dqserialnum, (task64 ? 8 : 4))) {
tsnap->ss_flags |= kHasDispatchSerial;
- *(uint64_t *)tracepos = dqserialnum;
+ memcpy(tracepos, &dqserialnum, sizeof(dqserialnum));
tracepos += 8;
}
}
*/
tracebytes = 0;
if (thread->kernel_stack != 0) {
+ uint32_t thread_snapshot_flags = 0;
#if defined(__LP64__)
- tracebytes = machine_trace_thread64(thread, tracepos, tracebound, MAX_FRAMES, FALSE);
+ tracebytes = machine_trace_thread64(thread, tracepos, tracebound, MAX_FRAMES, FALSE, &thread_snapshot_flags);
tsnap->ss_flags |= kKernel64_p;
framesize = 16;
#else
- tracebytes = machine_trace_thread(thread, tracepos, tracebound, MAX_FRAMES, FALSE);
+ tracebytes = machine_trace_thread(thread, tracepos, tracebound, MAX_FRAMES, FALSE, &thread_snapshot_flags);
framesize = 8;
#endif
+ if (thread_snapshot_flags != 0) {
+ tsnap->ss_flags |= thread_snapshot_flags;
+ }
}
tsnap->nkern_frames = tracebytes/framesize;
tracepos += tracebytes;
tracebytes = 0;
/* Trace user stack, if any */
if (save_userframes_p && task->active && thread->task->map != kernel_map) {
+ uint32_t thread_snapshot_flags = 0;
/* 64-bit task? */
if (task_has_64BitAddr(thread->task)) {
- tracebytes = machine_trace_thread64(thread, tracepos, tracebound, MAX_FRAMES, TRUE);
+ tracebytes = machine_trace_thread64(thread, tracepos, tracebound, MAX_FRAMES, TRUE, &thread_snapshot_flags);
tsnap->ss_flags |= kUser64_p;
framesize = 16;
}
else {
- tracebytes = machine_trace_thread(thread, tracepos, tracebound, MAX_FRAMES, TRUE);
+ tracebytes = machine_trace_thread(thread, tracepos, tracebound, MAX_FRAMES, TRUE, &thread_snapshot_flags);
framesize = 8;
}
+ if (thread_snapshot_flags != 0) {
+ tsnap->ss_flags |= thread_snapshot_flags;
+ }
}
tsnap->nuser_frames = tracebytes/framesize;
tracepos += tracebytes;
{
int pid = -1;
- if (task->bsd_info)
+ if (task->bsd_info) {
pid = proc_pid(task->bsd_info);
+ } else {
+ pid = task_pid(task);
+ }
return pid;
}
return did_throttle;
}
+static uint64_t
+proc_dispatchqueue_serialno_offset_from_task(task_t task)
+{
+ uint64_t dq_serialno_offset = 0;
+
+ if (task->bsd_info) {
+ dq_serialno_offset = get_dispatchqueue_serialno_offset_from_proc(task->bsd_info);
+ }
+
+ return dq_serialno_offset;
+}
+
static void
kdp_mem_and_io_snapshot(struct mem_and_io_snapshot *memio_snap)
{
size_t rem = size;
char *kvaddr = dest;
+#if (defined(__arm64__) || defined(NAND_PANIC_DEVICE)) && !defined(LEGACY_PANIC_LOGS)
+ /* Identify if destination buffer is in panic storage area */
+ if ((vm_offset_t)dest >= gPanicBase && (vm_offset_t)dest < gPanicBase + gPanicSize) {
+ if (((vm_offset_t)dest + size) >= (gPanicBase + gPanicSize)) {
+ return FALSE;
+ }
+ ppnum_t upn = pmap_find_phys(p, uaddr);
+ uint64_t phys_src = ptoa_64(upn) | (uaddr & PAGE_MASK);
+ void *src_va = (void*)phystokv(phys_src);
+ if (upn && pmap_valid_page(upn)) {
+ bcopy(src_va, kvaddr, size);
+ return TRUE;
+ }
+ return FALSE;
+ }
+#endif
+
while (rem) {
ppnum_t upn = pmap_find_phys(p, uaddr);
uint64_t phys_src = ptoa_64(upn) | (uaddr & PAGE_MASK);
break;
uaddr += cur_size;
kvaddr += cur_size;
- rem -= cur_size;
+ rem -= cur_size;
}
return (rem == 0);
}
void
do_stackshot()
{
- stack_snapshot_ret = kdp_stackshot(stack_snapshot_pid,
+ if (stack_snapshot_flags & STACKSHOT_KCDATA_FORMAT) {
+ stack_snapshot_ret = kdp_stackshot_kcdata_format(stack_snapshot_pid,
+ stack_snapshot_flags,
+ &stack_snapshot_bytes_traced);
+ }
+ else {
+ stack_snapshot_ret = kdp_stackshot(stack_snapshot_pid,
stack_snapshot_buf, stack_snapshot_bufsize,
- stack_snapshot_flags, stack_snapshot_dispatch_offset,
- &stack_snapshot_bytes_traced);
-
+ stack_snapshot_flags, &stack_snapshot_bytes_traced);
+ }
}
/*
* happen.
*/
vm_offset_t
-machine_trace_thread_get_kva(vm_offset_t cur_target_addr)
+machine_trace_thread_get_kva(vm_offset_t cur_target_addr, vm_map_t map, uint32_t *thread_trace_flags)
{
unsigned cur_wimg_bits;
vm_offset_t cur_target_page;
cur_phys_addr = kdp_vtophys(kdp_pmap ? kdp_pmap : kernel_pmap, cur_target_addr);
if (!pmap_valid_page((ppnum_t) atop(cur_phys_addr))) {
- return 0;
- }
- cur_wimg_bits = pmap_cache_attributes((ppnum_t) atop(cur_phys_addr));
+ if (!stack_enable_faulting) {
+ return 0;
+ }
- if ((cur_wimg_bits & VM_WIMG_MASK) != VM_WIMG_DEFAULT) {
- return 0;
+ /*
+ * The pmap doesn't have a valid page so we start at the top level
+ * vm map and try a lightweight fault.
+ */
+ cur_phys_addr = kdp_lightweight_fault(map, (cur_target_addr & ~PAGE_MASK), thread_trace_flags);
+ cur_phys_addr += (cur_target_addr & PAGE_MASK);
+
+ if (!pmap_valid_page((ppnum_t) atop(cur_phys_addr)))
+ return 0;
+ } else {
+ /*
+ * This check is done in kdp_lightweight_fault for the fault path.
+ */
+ cur_wimg_bits = pmap_cache_attributes((ppnum_t) atop(cur_phys_addr));
+
+ if ((cur_wimg_bits & VM_WIMG_MASK) != VM_WIMG_DEFAULT) {
+ return 0;
+ }
}
#if __x86_64__
projects / apple / xnu.git / blobdiff