+/* * Copyright (c) 2019 Apple Inc. All rights reserved. */
+
#include <stddef.h>
#undef offset
#include <kern/kalloc.h>
#include <kern/clock.h>
#include <kern/assert.h>
+#include <kern/task.h>
#include <firehose/tracepoint_private.h>
+#include <firehose/chunk_private.h>
#include <os/firehose_buffer_private.h>
#include <os/firehose.h>
#include "log_encode.h"
+/* on embedded, with no kext loading or unloads,
+ * make the kernel use the libtrace shared cache path for logging
+ */
+#define FIREHOSE_USES_SHARED_CACHE NO_KEXTD
+
+#if FIREHOSE_USES_SHARED_CACHE
+extern vm_offset_t segLOWESTTEXT;
+#endif
+
struct os_log_s {
int a;
};
struct os_log_s _os_log_default;
struct os_log_s _os_log_replay;
extern vm_offset_t kernel_firehose_addr;
-extern firehose_buffer_chunk_t firehose_boot_chunk;
+extern firehose_chunk_t firehose_boot_chunk;
extern void bsd_log_lock(void);
extern void bsd_log_unlock(void);
-extern void logwakeup(void);
+extern void logwakeup(struct msgbuf *);
+
+decl_lck_spin_data(extern, oslog_stream_lock);
+#define stream_lock() lck_spin_lock(&oslog_stream_lock)
+#define stream_unlock() lck_spin_unlock(&oslog_stream_lock)
-decl_lck_spin_data(extern, oslog_stream_lock)
extern void oslog_streamwakeup(void);
void oslog_streamwrite_locked(firehose_tracepoint_id_u ftid,
- uint64_t stamp, const void *pubdata, size_t publen);
+ uint64_t stamp, const void *pubdata, size_t publen);
extern void oslog_streamwrite_metadata_locked(oslog_stream_buf_entry_t m_entry);
extern int oslog_stream_open;
uint32_t oslog_s_metadata_msgcount = 0;
static bool oslog_boot_done = false;
-extern boolean_t oslog_early_boot_complete;
+extern boolean_t early_boot_complete;
+
+#ifdef XNU_KERNEL_PRIVATE
+bool startup_serial_logging_active = true;
+uint64_t startup_serial_num_procs = 300;
+#endif /* XNU_KERNEL_PRIVATE */
// XXX
firehose_tracepoint_id_t
firehose_debug_trace(firehose_stream_t stream, firehose_tracepoint_id_t trace_id,
- uint64_t timestamp, const char *format, const void *pubdata, size_t publen);
+ uint64_t timestamp, const char *format, const void *pubdata, size_t publen);
static inline firehose_tracepoint_id_t
_firehose_trace(firehose_stream_t stream, firehose_tracepoint_id_u ftid,
- uint64_t stamp, const void *pubdata, size_t publen);
+ uint64_t stamp, const void *pubdata, size_t publen);
static oslog_stream_buf_entry_t
oslog_stream_create_buf_entry(oslog_stream_link_type_t type, firehose_tracepoint_id_u ftid,
- uint64_t stamp, const void* pubdata, size_t publen);
+ uint64_t stamp, const void* pubdata, size_t publen);
static void
_os_log_with_args_internal(os_log_t oslog __unused, os_log_type_t type __unused,
- const char *format, va_list args, void *addr, void *dso);
+ const char *format, va_list args, void *addr, void *dso, bool driverKit, bool addcr);
static void
-_os_log_to_msgbuf_internal(const char *format, va_list args, bool safe, bool logging);
+_os_log_to_msgbuf_internal(const char *format, va_list args, bool safe, bool logging, bool addcr);
static void
_os_log_to_log_internal(os_log_t oslog, os_log_type_t type,
- const char *format, va_list args, void *addr, void *dso);
+ const char *format, va_list args, void *addr, void *dso, bool driverKit);
static void
_os_log_actual(os_log_t oslog, os_log_type_t type, const char *format, void
- *dso, void *addr, os_log_buffer_context_t context);
+ *dso, void *addr, os_log_buffer_context_t context, bool driverKit);
bool
os_log_info_enabled(os_log_t log __unused)
return true;
}
-__attribute__((noinline,not_tail_called)) void
+__attribute__((noinline, not_tail_called)) void
_os_log_internal(void *dso, os_log_t log, uint8_t type, const char *message, ...)
{
- va_list args;
- void *addr = __builtin_return_address(0);
+ va_list args;
+ void *addr = __builtin_return_address(0);
+
+ va_start(args, message);
+
+ _os_log_with_args_internal(log, type, message, args, addr, dso, FALSE, FALSE);
+
+ va_end(args);
+
+ return;
+}
+
+__attribute__((noinline, not_tail_called)) int
+_os_log_internal_driverKit(void *dso, os_log_t log, uint8_t type, const char *message, ...)
+{
+ va_list args;
+ void *addr = __builtin_return_address(0);
+ bool driverKitLog = FALSE;
+
+ /*
+ * We want to be able to identify dexts from the logs.
+ *
+ * Usually the addr is used to understand if the log line
+ * was generated by a kext or the kernel main executable.
+ * Logd uses copyKextUUIDForAddress with the addr specified
+ * in the log line to retrieve the kext UUID of the sender.
+ *
+ * Dext however are not loaded in kernel space so they do not
+ * have a kernel range of addresses.
+ *
+ * To make the same mechanism work, OSKext fakes a kernel
+ * address range for dexts using the loadTag,
+ * so we just need to use the loadTag as addr here
+ * to allow logd to retrieve the correct UUID.
+ *
+ * NOTE: loadTag is populated in the task when the dext is matching,
+ * so if log lines are generated before the matching they will be
+ * identified as kernel main executable.
+ */
+ task_t self_task = current_task();
+
+ /*
+ * Only dextis are supposed to use this log path.
+ */
+ if (!task_is_driver(self_task)) {
+ return EPERM;
+ }
- va_start(args, message);
+ uint64_t loadTag = get_task_loadTag(self_task);
+ if (loadTag != 0) {
+ driverKitLog = TRUE;
+ addr = (void*) loadTag;
+ }
+ va_start(args, message);
- _os_log_with_args_internal(log, type, message, args, addr, dso);
+ _os_log_with_args_internal(log, type, message, args, addr, dso, driverKitLog, true);
- va_end(args);
+ va_end(args);
- return;
+ return 0;
}
#pragma mark - shim functions
-__attribute__((noinline,not_tail_called)) void
+__attribute__((noinline, not_tail_called)) void
os_log_with_args(os_log_t oslog, os_log_type_t type, const char *format, va_list args, void *addr)
{
- // if no address passed, look it up
- if (addr == NULL) {
- addr = __builtin_return_address(0);
- }
+ // if no address passed, look it up
+ if (addr == NULL) {
+ addr = __builtin_return_address(0);
+ }
- _os_log_with_args_internal(oslog, type, format, args, addr, NULL);
+ _os_log_with_args_internal(oslog, type, format, args, addr, NULL, FALSE, FALSE);
}
static void
_os_log_with_args_internal(os_log_t oslog, os_log_type_t type,
- const char *format, va_list args, void *addr, void *dso)
+ const char *format, va_list args, void *addr, void *dso, bool driverKit, bool addcr)
{
- uint32_t logging_config = atm_get_diagnostic_config();
- boolean_t safe;
- boolean_t logging;
+ uint32_t logging_config = atm_get_diagnostic_config();
+ boolean_t safe;
+ boolean_t logging;
- if (format[0] == '\0') {
- return;
- }
- /* cf. r24974766 & r25201228*/
- safe = (!oslog_early_boot_complete || oslog_is_safe());
- logging = (!(logging_config & ATM_TRACE_DISABLE) || !(logging_config & ATM_TRACE_OFF));
+ if (format[0] == '\0') {
+ return;
+ }
- if (oslog != &_os_log_replay) {
- _os_log_to_msgbuf_internal(format, args, safe, logging);
- }
+ /* early boot can log to dmesg for later replay (27307943) */
+ safe = (!early_boot_complete || oslog_is_safe());
- if (safe && logging) {
- _os_log_to_log_internal(oslog, type, format, args, addr, dso);
- }
+ if (logging_config & ATM_TRACE_DISABLE || logging_config & ATM_TRACE_OFF) {
+ logging = false;
+ } else {
+ logging = true;
+ }
+
+ if (oslog != &_os_log_replay) {
+ _os_log_to_msgbuf_internal(format, args, safe, logging, addcr);
+ }
+
+ if (safe && logging) {
+ _os_log_to_log_internal(oslog, type, format, args, addr, dso, driverKit);
+ }
}
static void
-_os_log_to_msgbuf_internal(const char *format, va_list args, bool safe, bool logging)
+_os_log_to_msgbuf_internal(const char *format, va_list args, bool safe, bool logging, bool addcr)
{
- static int msgbufreplay = -1;
- va_list args_copy;
-
- bsd_log_lock();
-
- if (!safe) {
- if (-1 == msgbufreplay) msgbufreplay = msgbufp->msg_bufx;
- } else if (logging && (-1 != msgbufreplay)) {
- uint32_t i;
- uint32_t localbuff_size;
- int newl, position;
- char *localbuff, *p, *s, *next, ch;
-
- position = msgbufreplay;
- msgbufreplay = -1;
- localbuff_size = (msgbufp->msg_size + 2); /* + '\n' + '\0' */
- /* Size for non-blocking */
- if (localbuff_size > 4096) localbuff_size = 4096;
- bsd_log_unlock();
- /* Allocate a temporary non-circular buffer */
- if ((localbuff = (char *)kalloc_noblock(localbuff_size))) {
- /* in between here, the log could become bigger, but that's fine */
- bsd_log_lock();
- /*
- * The message buffer is circular; start at the replay pointer, and
- * make one loop up to write pointer - 1.
- */
- p = msgbufp->msg_bufc + position;
- for (i = newl = 0; p != msgbufp->msg_bufc + msgbufp->msg_bufx - 1; ++p) {
- if (p >= msgbufp->msg_bufc + msgbufp->msg_size)
- p = msgbufp->msg_bufc;
- ch = *p;
- if (ch == '\0') continue;
- newl = (ch == '\n');
- localbuff[i++] = ch;
- if (i >= (localbuff_size - 2)) break;
- }
- bsd_log_unlock();
-
- if (!newl) localbuff[i++] = '\n';
- localbuff[i++] = 0;
-
- s = localbuff;
- while ((next = strchr(s, '\n'))) {
- next++;
- ch = next[0];
- next[0] = 0;
- os_log(&_os_log_replay, "%s", s);
- next[0] = ch;
- s = next;
- }
- kfree(localbuff, localbuff_size);
- }
- bsd_log_lock();
- }
+ static int msgbufreplay = -1;
+ va_list args_copy;
- va_copy(args_copy, args);
- vprintf_log_locked(format, args_copy);
- va_end(args_copy);
+#if DEVELOPMENT || DEBUG
+ if (safe) {
+ bsd_log_lock();
+ }
+#else
+ bsd_log_lock();
+#endif
- bsd_log_unlock();
+ if (!safe) {
+ if (-1 == msgbufreplay) {
+ msgbufreplay = msgbufp->msg_bufx;
+ }
+ } else if (logging && (-1 != msgbufreplay)) {
+ uint32_t i;
+ uint32_t localbuff_size;
+ int newl, position;
+ char *localbuff, *p, *s, *next, ch;
+
+ position = msgbufreplay;
+ msgbufreplay = -1;
+ localbuff_size = (msgbufp->msg_size + 2); /* + '\n' + '\0' */
+ /* Size for non-blocking */
+ if (localbuff_size > 4096) {
+ localbuff_size = 4096;
+ }
+ bsd_log_unlock();
+ /* Allocate a temporary non-circular buffer */
+ if ((localbuff = (char *)kalloc_noblock(localbuff_size))) {
+ /* in between here, the log could become bigger, but that's fine */
+ bsd_log_lock();
+ /*
+ * The message buffer is circular; start at the replay pointer, and
+ * make one loop up to write pointer - 1.
+ */
+ p = msgbufp->msg_bufc + position;
+ for (i = newl = 0; p != msgbufp->msg_bufc + msgbufp->msg_bufx - 1; ++p) {
+ if (p >= msgbufp->msg_bufc + msgbufp->msg_size) {
+ p = msgbufp->msg_bufc;
+ }
+ ch = *p;
+ if (ch == '\0') {
+ continue;
+ }
+ newl = (ch == '\n');
+ localbuff[i++] = ch;
+ if (i >= (localbuff_size - 2)) {
+ break;
+ }
+ }
+ bsd_log_unlock();
- if (safe) logwakeup();
+ if (!newl) {
+ localbuff[i++] = '\n';
+ }
+ localbuff[i++] = 0;
+
+ s = localbuff;
+ while ((next = strchr(s, '\n'))) {
+ next++;
+ ch = next[0];
+ next[0] = 0;
+ os_log(&_os_log_replay, "%s", s);
+ next[0] = ch;
+ s = next;
+ }
+ kfree(localbuff, localbuff_size);
+ }
+ bsd_log_lock();
+ }
+
+ va_copy(args_copy, args);
+ vprintf_log_locked(format, args_copy, addcr);
+ va_end(args_copy);
+
+#if DEVELOPMENT || DEBUG
+ if (safe) {
+ bsd_log_unlock();
+ logwakeup(msgbufp);
+ }
+#else
+ bsd_log_unlock();
+ if (safe) {
+ logwakeup(msgbufp);
+ }
+#endif
}
static void
_os_log_to_log_internal(os_log_t oslog, os_log_type_t type,
- const char *format, va_list args, void *addr, void *dso)
+ const char *format, va_list args, void *addr, void *dso, bool driverKit)
{
- struct os_log_buffer_context_s context;
- unsigned char buffer_data[OS_LOG_BUFFER_MAX_SIZE] __attribute__((aligned(8)));
- os_log_buffer_t buffer = (os_log_buffer_t)buffer_data;
- uint8_t pubdata[OS_LOG_BUFFER_MAX_SIZE];
- va_list args_copy;
-
- if (dso == NULL) {
- dso = (void *) OSKextKextForAddress(format);
- if (dso == NULL) {
- return;
- }
- }
-
- if (!_os_trace_addr_in_text_segment(dso, format)) {
- return;
- }
+ struct os_log_buffer_context_s context;
+ unsigned char buffer_data[OS_LOG_BUFFER_MAX_SIZE] __attribute__((aligned(8)));
+ os_log_buffer_t buffer = (os_log_buffer_t)buffer_data;
+ uint8_t pubdata[OS_LOG_BUFFER_MAX_SIZE];
+ va_list args_copy;
+
+ if (addr == NULL) {
+ return;
+ }
- if (addr == NULL) {
- return;
- }
+#if FIREHOSE_USES_SHARED_CACHE
+ dso = (void *) segLOWESTTEXT;
+#else /* FIREHOSE_USES_SHARED_CACHE */
+ if (dso == NULL) {
+ dso = (void *) OSKextKextForAddress(format);
+ if (dso == NULL) {
+ return;
+ }
+ }
- void *dso_addr = (void *) OSKextKextForAddress(addr);
- if (dso != dso_addr) {
- return;
- }
+ if (!_os_trace_addr_in_text_segment(dso, format)) {
+ return;
+ }
+ if (!driverKit) {
+ void *dso_addr = (void *) OSKextKextForAddress(addr);
+ if (dso != dso_addr) {
+ return;
+ }
+ }
+#endif /* FIREHOSE_USES_SHARED_CACHE */
- memset(&context, 0, sizeof(context));
- memset(buffer, 0, OS_LOG_BUFFER_MAX_SIZE);
+ memset(&context, 0, sizeof(context));
+ memset(buffer, 0, OS_LOG_BUFFER_MAX_SIZE);
- context.shimmed = true;
- context.buffer = buffer;
- context.content_sz = OS_LOG_BUFFER_MAX_SIZE - sizeof(*buffer);
- context.pubdata = pubdata;
- context.pubdata_sz = sizeof(pubdata);
+ context.shimmed = true;
+ context.buffer = buffer;
+ context.content_sz = OS_LOG_BUFFER_MAX_SIZE - sizeof(*buffer);
+ context.pubdata = pubdata;
+ context.pubdata_sz = sizeof(pubdata);
- va_copy(args_copy, args);
+ va_copy(args_copy, args);
- (void)hw_atomic_add(&oslog_p_total_msgcount, 1);
- if (_os_log_encode(format, args_copy, 0, &context)) {
- _os_log_actual(oslog, type, format, dso, addr, &context);
- }
- else {
- (void)hw_atomic_add(&oslog_p_error_count, 1);
- }
+ os_atomic_inc(&oslog_p_total_msgcount, relaxed);
+ if (_os_log_encode(format, args_copy, 0, &context)) {
+ _os_log_actual(oslog, type, format, dso, addr, &context, driverKit);
+ } else {
+ os_atomic_inc(&oslog_p_error_count, relaxed);
+ }
- va_end(args_copy);
+ va_end(args_copy);
}
-size_t
-_os_trace_location_for_address(void *dso, const void *address,
- os_trace_location_t location, firehose_tracepoint_flags_t *flags);
-
-size_t
-_os_trace_location_for_address(void *dso, const void *address,
- os_trace_location_t location, firehose_tracepoint_flags_t *flags)
+static inline size_t
+_os_trace_write_location_for_address(uint8_t buf[static sizeof(uint64_t)],
+ void *dso, const void *address, firehose_tracepoint_flags_t *flags, __unused bool driverKit)
{
+ uintptr_t shift_addr = (uintptr_t)address - (uintptr_t)dso;
+#if FIREHOSE_USES_SHARED_CACHE
+
+ *flags = _firehose_tracepoint_flags_pc_style_shared_cache;
+ memcpy(buf, (uint32_t[]){ shift_addr },
+ sizeof(uint32_t));
+ return sizeof(uint32_t);
+
+#else /* FIREHOSE_USES_SHARED_CACHE */
kernel_mach_header_t *mh = dso;
- if (mh->filetype == MH_EXECUTE) {
- location->flags = _firehose_tracepoint_flags_base_main_executable;
- location->offset = (uint32_t) ((uintptr_t)address - (uintptr_t)dso);
- (*flags) |= location->flags;
- return sizeof(location->offset); // offset based
+ /*
+ * driverKit will have the dso set as MH_EXECUTE
+ * (it is logging from a syscall in the kernel)
+ * but needs logd to parse the address as an
+ * absolute pc.
+ */
+ if (mh->filetype == MH_EXECUTE && !driverKit) {
+ *flags = _firehose_tracepoint_flags_pc_style_main_exe;
+ memcpy(buf, (uint32_t[]){ shift_addr}, sizeof(uint32_t));
+ return sizeof(uint32_t);
} else {
- location->flags = _firehose_tracepoint_flags_base_caller_pc;
- (*flags) |= location->flags;
- location->pc = (uintptr_t)VM_KERNEL_UNSLIDE(address);
- return sizeof(location->encode_value);
+ *flags = _firehose_tracepoint_flags_pc_style_absolute;
+ if (!driverKit) {
+ shift_addr = VM_KERNEL_UNSLIDE(address);
+ } else {
+ shift_addr = (uintptr_t) address;
+ }
+ memcpy(buf, (uintptr_t[]){ shift_addr }, sizeof(uintptr_t));
+#if __LP64__
+ return 6; // 48 bits are enough
+#else
+ return sizeof(uintptr_t);
+#endif
}
+#endif /* !FIREHOSE_USES_SHARED_CACHE */
}
OS_ALWAYS_INLINE
-inline bool
-_os_log_buffer_pack(uint8_t *buffdata, unsigned int *buffdata_sz, os_log_buffer_context_t ctx)
+static inline size_t
+_os_log_buffer_pack(uint8_t *buffdata, size_t buffdata_sz,
+ os_log_buffer_context_t ctx)
{
- os_log_buffer_t buffer = ctx->buffer;
- uint16_t buffer_sz = (uint16_t) (sizeof(*ctx->buffer) + ctx->content_sz);
- uint16_t total_sz = buffer_sz + ctx->pubdata_sz;
+ os_log_buffer_t buffer = ctx->buffer;
+ size_t buffer_sz = sizeof(*ctx->buffer) + ctx->content_sz;
+ size_t total_sz = buffer_sz + ctx->pubdata_sz;
- // [buffer] [pubdata]
- if (total_sz >= (*buffdata_sz)) {
- return false;
- }
-
- memcpy(buffdata, buffer, buffer_sz);
- memcpy(&buffdata[buffer_sz], ctx->pubdata, ctx->pubdata_sz);
-
- (*buffdata_sz) = total_sz;
+ if (total_sz > buffdata_sz) {
+ return 0;
+ }
- return true;
+ memcpy(buffdata, buffer, buffer_sz);
+ memcpy(&buffdata[buffer_sz], ctx->pubdata, ctx->pubdata_sz);
+ return total_sz;
}
static void
_os_log_actual(os_log_t oslog __unused, os_log_type_t type, const char *format,
- void *dso, void *addr, os_log_buffer_context_t context)
+ void *dso, void *addr, os_log_buffer_context_t context, bool driverKit)
{
firehose_stream_t stream;
firehose_tracepoint_flags_t flags = 0;
firehose_tracepoint_id_u trace_id;
- os_trace_location_u addr_loc;
uint8_t buffdata[OS_LOG_BUFFER_MAX_SIZE];
- unsigned int buffdata_sz = (unsigned int) sizeof(buffdata);
- size_t buffdata_idx = 0;
- size_t addr_loc_sz;
+ size_t addr_len = 0, buffdata_sz;
uint64_t timestamp;
uint64_t thread_id;
- memset(&addr_loc, 0, sizeof(addr_loc));
-
// dso == the start of the binary that was loaded
- // codes are the offset into the binary from start
- addr_loc_sz = _os_trace_location_for_address(dso, addr, &addr_loc, &flags);
+ addr_len = _os_trace_write_location_for_address(buffdata, dso, addr, &flags, driverKit);
+ buffdata_sz = _os_log_buffer_pack(buffdata + addr_len,
+ sizeof(buffdata) - addr_len, context);
+ if (buffdata_sz == 0) {
+ return;
+ }
+ buffdata_sz += addr_len;
timestamp = firehose_tracepoint_time(firehose_activity_flags_default);
thread_id = thread_tid(current_thread());
- // insert the location
- memcpy(&buffdata[buffdata_idx], &addr_loc, addr_loc_sz);
- buffdata_idx += addr_loc_sz;
-
- // create trace_id after we've set additional flags
- trace_id.ftid_value = FIREHOSE_TRACE_ID_MAKE(firehose_tracepoint_namespace_log,
- type, flags, _os_trace_offset(dso, format, flags));
-
- // pack the buffer data after the header data
- buffdata_sz -= buffdata_idx; // subtract the existing content from the size
- _os_log_buffer_pack(&buffdata[buffdata_idx], &buffdata_sz, context);
- buffdata_sz += buffdata_idx; // add the header amount too
+ if (driverKit) {
+ // set FIREHOSE_TRACEPOINT_PC_DYNAMIC_BIT so logd will not try to find the format string in
+ // the executable text
+ trace_id.ftid_value = FIREHOSE_TRACE_ID_MAKE(firehose_tracepoint_namespace_log,
+ type, flags, (uintptr_t) addr | FIREHOSE_TRACEPOINT_PC_DYNAMIC_BIT);
+ } else {
+ // create trace_id after we've set additional flags
+ trace_id.ftid_value = FIREHOSE_TRACE_ID_MAKE(firehose_tracepoint_namespace_log,
+ type, flags, _os_trace_offset(dso, format, (_firehose_tracepoint_flags_activity_t)flags));
+ }
if (FALSE) {
firehose_debug_trace(stream, trace_id.ftid_value, timestamp,
- format, buffdata, buffdata_sz);
+ format, buffdata, buffdata_sz);
}
-
if (type == OS_LOG_TYPE_INFO || type == OS_LOG_TYPE_DEBUG) {
stream = firehose_stream_memory;
- }
- else {
+ } else {
stream = firehose_stream_persist;
}
-
_firehose_trace(stream, trace_id, timestamp, buffdata, buffdata_sz);
}
static inline firehose_tracepoint_id_t
_firehose_trace(firehose_stream_t stream, firehose_tracepoint_id_u ftid,
- uint64_t stamp, const void *pubdata, size_t publen)
+ uint64_t stamp, const void *pubdata, size_t publen)
{
const uint16_t ft_size = offsetof(struct firehose_tracepoint_s, ft_data);
const size_t _firehose_chunk_payload_size =
- sizeof(((struct firehose_buffer_chunk_s *)0)->fbc_data);
+ sizeof(((struct firehose_chunk_s *)0)->fc_data);
firehose_tracepoint_t ft;
if (slowpath(ft_size + publen > _firehose_chunk_payload_size)) {
// We'll need to have some handling here. For now - return 0
- (void)hw_atomic_add(&oslog_p_error_count, 1);
+ os_atomic_inc(&oslog_p_error_count, relaxed);
return 0;
}
if (oslog_stream_open && (stream != firehose_stream_metadata)) {
-
- lck_spin_lock(&oslog_stream_lock);
+ stream_lock();
if (!oslog_stream_open) {
- lck_spin_unlock(&oslog_stream_lock);
+ stream_unlock();
goto out;
}
oslog_s_total_msgcount++;
oslog_streamwrite_locked(ftid, stamp, pubdata, publen);
- lck_spin_unlock(&oslog_stream_lock);
+ stream_unlock();
oslog_streamwakeup();
}
if (!fastpath(ft)) {
if (oslog_boot_done) {
if (stream == firehose_stream_metadata) {
- (void)hw_atomic_add(&oslog_p_metadata_dropped_msgcount, 1);
- }
- else {
+ os_atomic_inc(&oslog_p_metadata_dropped_msgcount, relaxed);
+ } else {
// If we run out of space in the persistence buffer we're
// dropping the message.
- (void)hw_atomic_add(&oslog_p_dropped_msgcount, 1);
+ os_atomic_inc(&oslog_p_dropped_msgcount, relaxed);
}
return 0;
}
- firehose_buffer_chunk_t fbc = firehose_boot_chunk;
+ firehose_chunk_t fbc = firehose_boot_chunk;
+ long offset;
//only stream available during boot is persist
- ft = __firehose_buffer_tracepoint_reserve_with_chunk(fbc, stamp, firehose_stream_persist, publen, 0, NULL);
- if (!fastpath(ft)) {
- (void)hw_atomic_add(&oslog_p_boot_dropped_msgcount, 1);
+ offset = firehose_chunk_tracepoint_try_reserve(fbc, stamp,
+ firehose_stream_persist, 0, publen, 0, NULL);
+ if (offset <= 0) {
+ os_atomic_inc(&oslog_p_boot_dropped_msgcount, relaxed);
return 0;
}
- else {
- memcpy(ft->ft_data, pubdata, publen);
- __firehose_buffer_tracepoint_flush_chunk(fbc, ft, ftid);
- (void)hw_atomic_add(&oslog_p_saved_msgcount, 1);
- return ftid.ftid_value;
- }
+
+ ft = firehose_chunk_tracepoint_begin(fbc, stamp, publen,
+ thread_tid(current_thread()), offset);
+ memcpy(ft->ft_data, pubdata, publen);
+ firehose_chunk_tracepoint_end(fbc, ft, ftid);
+ os_atomic_inc(&oslog_p_saved_msgcount, relaxed);
+ return ftid.ftid_value;
}
if (!oslog_boot_done) {
oslog_boot_done = true;
__firehose_buffer_tracepoint_flush(ft, ftid);
if (stream == firehose_stream_metadata) {
- (void)hw_atomic_add(&oslog_p_metadata_saved_msgcount, 1);
- }
- else {
- (void)hw_atomic_add(&oslog_p_saved_msgcount, 1);
+ os_atomic_inc(&oslog_p_metadata_saved_msgcount, relaxed);
+ } else {
+ os_atomic_inc(&oslog_p_saved_msgcount, relaxed);
}
return ftid.ftid_value;
}
static oslog_stream_buf_entry_t
oslog_stream_create_buf_entry(oslog_stream_link_type_t type, firehose_tracepoint_id_u ftid,
- uint64_t stamp, const void* pubdata, size_t publen)
+ uint64_t stamp, const void* pubdata, size_t publen)
{
oslog_stream_buf_entry_t m_entry = NULL;
firehose_tracepoint_t ft = NULL;
}
m_entry_len = sizeof(struct oslog_stream_buf_entry_s) +
- sizeof(struct firehose_tracepoint_s) + publen;
+ sizeof(struct firehose_tracepoint_s) + publen;
m_entry = (oslog_stream_buf_entry_t) kalloc(m_entry_len);
if (!m_entry) {
return NULL;
#ifdef KERNEL
void
firehose_trace_metadata(firehose_stream_t stream, firehose_tracepoint_id_u ftid,
- uint64_t stamp, const void *pubdata, size_t publen)
+ uint64_t stamp, const void *pubdata, size_t publen)
{
oslog_stream_buf_entry_t m_entry = NULL;
// If streaming mode is not on, only log the metadata
// in the persistence buffer
- lck_spin_lock(&oslog_stream_lock);
+ stream_lock();
if (!oslog_stream_open) {
- lck_spin_unlock(&oslog_stream_lock);
+ stream_unlock();
goto finish;
}
- lck_spin_unlock(&oslog_stream_lock);
+ stream_unlock();
// Setup and write the stream metadata entry
m_entry = oslog_stream_create_buf_entry(oslog_stream_link_type_metadata, ftid,
- stamp, pubdata, publen);
+ stamp, pubdata, publen);
if (!m_entry) {
- (void)hw_atomic_add(&oslog_s_error_count, 1);
+ os_atomic_inc(&oslog_s_error_count, relaxed);
goto finish;
}
- lck_spin_lock(&oslog_stream_lock);
+ stream_lock();
if (!oslog_stream_open) {
- lck_spin_unlock(&oslog_stream_lock);
+ stream_unlock();
kfree(m_entry, sizeof(struct oslog_stream_buf_entry_s) +
- sizeof(struct firehose_tracepoint_s) + publen);
+ sizeof(struct firehose_tracepoint_s) + publen);
goto finish;
}
oslog_s_metadata_msgcount++;
oslog_streamwrite_metadata_locked(m_entry);
- lck_spin_unlock(&oslog_stream_lock);
+ stream_unlock();
finish:
_firehose_trace(stream, ftid, stamp, pubdata, publen);
firehose_tracepoint_id_t
firehose_debug_trace(firehose_stream_t stream, firehose_tracepoint_id_t trace_id,
- uint64_t timestamp, const char *format, const void *pubdata, size_t publen)
+ uint64_t timestamp, const char *format, const void *pubdata, size_t publen)
{
kprintf("[os_log stream 0x%x trace_id 0x%llx timestamp %llu format '%s' data %p len %lu]\n",
- (unsigned int)stream, (unsigned long long)trace_id, timestamp,
- format, pubdata, publen);
+ (unsigned int)stream, (unsigned long long)trace_id, timestamp,
+ format, pubdata, publen);
size_t i;
const unsigned char *cdata = (const unsigned char *)pubdata;
- for (i=0; i < publen; i += 8) {
+ for (i = 0; i < publen; i += 8) {
kprintf(">oslog 0x%08x: 0x%02x 0x%02x 0x%02x 0x%02x 0x%02x 0x%02x 0x%02x 0x%02x\n",
- (unsigned int)i,
- (i+0) < publen ? cdata[i+0] : 0,
- (i+1) < publen ? cdata[i+1] : 0,
- (i+2) < publen ? cdata[i+2] : 0,
- (i+3) < publen ? cdata[i+3] : 0,
- (i+4) < publen ? cdata[i+4] : 0,
- (i+5) < publen ? cdata[i+5] : 0,
- (i+6) < publen ? cdata[i+6] : 0,
- (i+7) < publen ? cdata[i+7] : 0
- );
+ (unsigned int)i,
+ (i + 0) < publen ? cdata[i + 0] : 0,
+ (i + 1) < publen ? cdata[i + 1] : 0,
+ (i + 2) < publen ? cdata[i + 2] : 0,
+ (i + 3) < publen ? cdata[i + 3] : 0,
+ (i + 4) < publen ? cdata[i + 4] : 0,
+ (i + 5) < publen ? cdata[i + 5] : 0,
+ (i + 6) < publen ? cdata[i + 6] : 0,
+ (i + 7) < publen ? cdata[i + 7] : 0
+ );
}
return trace_id;
}
void
-__firehose_buffer_push_to_logd(firehose_buffer_t fb __unused, bool for_io __unused) {
- oslogwakeup();
- return;
+__firehose_buffer_push_to_logd(firehose_buffer_t fb __unused, bool for_io __unused)
+{
+ oslogwakeup();
+ return;
}
void
-__firehose_allocate(vm_offset_t *addr, vm_size_t size __unused) {
- firehose_buffer_chunk_t kernel_buffer = (firehose_buffer_chunk_t)kernel_firehose_addr;
-
- if (kernel_firehose_addr) {
- *addr = kernel_firehose_addr;
- }
- else {
- *addr = 0;
- return;
- }
- // Now that we are done adding logs to this chunk, set the number of writers to 0
- // Without this, logd won't flush when the page is full
- firehose_boot_chunk->fbc_pos.fbc_refcnt = 0;
- memcpy(&kernel_buffer[FIREHOSE_BUFFER_KERNEL_CHUNK_COUNT - 1], (const void *)firehose_boot_chunk, FIREHOSE_BUFFER_CHUNK_SIZE);
- return;
+__firehose_allocate(vm_offset_t *addr, vm_size_t size __unused)
+{
+ firehose_chunk_t kernel_buffer = (firehose_chunk_t)kernel_firehose_addr;
+
+ if (kernel_firehose_addr) {
+ *addr = kernel_firehose_addr;
+ } else {
+ *addr = 0;
+ return;
+ }
+ // Now that we are done adding logs to this chunk, set the number of writers to 0
+ // Without this, logd won't flush when the page is full
+ firehose_boot_chunk->fc_pos.fcp_refcnt = 0;
+ memcpy(&kernel_buffer[FIREHOSE_BUFFER_KERNEL_CHUNK_COUNT - 1], (const void *)firehose_boot_chunk, FIREHOSE_CHUNK_SIZE);
+ return;
}
// There isnt a lock held in this case.
void
-__firehose_critical_region_enter(void) {
- disable_preemption();
- return;
+__firehose_critical_region_enter(void)
+{
+ disable_preemption();
+ return;
}
void
-__firehose_critical_region_leave(void) {
- enable_preemption();
- return;
+__firehose_critical_region_leave(void)
+{
+ enable_preemption();
+ return;
+}
+
+#ifdef CONFIG_XNUPOST
+
+#include <tests/xnupost.h>
+#define TESTOSLOGFMT(fn_name) "%u^%llu/%llu^kernel^0^test^" fn_name
+#define TESTOSLOGPFX "TESTLOG:%u#"
+#define TESTOSLOG(fn_name) TESTOSLOGPFX TESTOSLOGFMT(fn_name "#")
+
+extern u_int32_t RandomULong(void);
+extern uint32_t find_pattern_in_buffer(char * pattern, uint32_t len, int expected_count);
+void test_oslog_default_helper(uint32_t uniqid, uint64_t count);
+void test_oslog_info_helper(uint32_t uniqid, uint64_t count);
+void test_oslog_debug_helper(uint32_t uniqid, uint64_t count);
+void test_oslog_error_helper(uint32_t uniqid, uint64_t count);
+void test_oslog_fault_helper(uint32_t uniqid, uint64_t count);
+void _test_log_loop(void * arg __unused, wait_result_t wres __unused);
+void test_oslog_handleOSLogCtl(int32_t * in, int32_t * out, int32_t len);
+kern_return_t test_stresslog_dropmsg(uint32_t uniqid);
+
+kern_return_t test_os_log(void);
+kern_return_t test_os_log_parallel(void);
+
+#define GENOSLOGHELPER(fname, ident, callout_f) \
+ void fname(uint32_t uniqid, uint64_t count) \
+ { \
+ int32_t datalen = 0; \
+ uint32_t checksum = 0; \
+ char databuffer[256]; \
+ T_LOG("Doing os_log of %llu TESTLOG msgs for fn " ident, count); \
+ for (uint64_t i = 0; i < count; i++) \
+ { \
+ datalen = snprintf(databuffer, sizeof(databuffer), TESTOSLOGFMT(ident), uniqid, i + 1, count); \
+ checksum = crc32(0, databuffer, datalen); \
+ callout_f(OS_LOG_DEFAULT, TESTOSLOG(ident), checksum, uniqid, i + 1, count); \
+ /*T_LOG(TESTOSLOG(ident), checksum, uniqid, i + 1, count);*/ \
+ } \
+ }
+
+GENOSLOGHELPER(test_oslog_info_helper, "oslog_info_helper", os_log_info);
+GENOSLOGHELPER(test_oslog_fault_helper, "oslog_fault_helper", os_log_fault);
+GENOSLOGHELPER(test_oslog_debug_helper, "oslog_debug_helper", os_log_debug);
+GENOSLOGHELPER(test_oslog_error_helper, "oslog_error_helper", os_log_error);
+GENOSLOGHELPER(test_oslog_default_helper, "oslog_default_helper", os_log);
+
+kern_return_t
+test_os_log()
+{
+ char databuffer[256];
+ uint32_t uniqid = RandomULong();
+ uint32_t match_count = 0;
+ uint32_t checksum = 0;
+ uint32_t total_msg = 0;
+ uint32_t saved_msg = 0;
+ uint32_t dropped_msg = 0;
+ int datalen = 0;
+ uint64_t a = mach_absolute_time();
+ uint64_t seqno = 1;
+ uint64_t total_seqno = 2;
+
+ os_log_t log_handle = os_log_create("com.apple.xnu.test.t1", "kpost");
+
+ T_ASSERT_EQ_PTR(&_os_log_default, log_handle, "os_log_create returns valid value.");
+ T_ASSERT_EQ_INT(TRUE, os_log_info_enabled(log_handle), "os_log_info is enabled");
+ T_ASSERT_EQ_INT(TRUE, os_log_debug_enabled(log_handle), "os_log_debug is enabled");
+ T_ASSERT_EQ_PTR(&_os_log_default, OS_LOG_DEFAULT, "ensure OS_LOG_DEFAULT is _os_log_default");
+
+ total_msg = oslog_p_total_msgcount;
+ saved_msg = oslog_p_saved_msgcount;
+ dropped_msg = oslog_p_dropped_msgcount;
+ T_LOG("oslog internal counters total %u , saved %u, dropped %u", total_msg, saved_msg, dropped_msg);
+
+ T_LOG("Validating with uniqid %u u64 %llu", uniqid, a);
+ T_ASSERT_NE_UINT(0, uniqid, "random number should not be zero");
+ T_ASSERT_NE_ULLONG(0, a, "absolute time should not be zero");
+
+ datalen = snprintf(databuffer, sizeof(databuffer), TESTOSLOGFMT("printf_only"), uniqid, seqno, total_seqno);
+ checksum = crc32(0, databuffer, datalen);
+ printf(TESTOSLOG("printf_only") "mat%llu\n", checksum, uniqid, seqno, total_seqno, a);
+
+ seqno += 1;
+ datalen = snprintf(databuffer, sizeof(databuffer), TESTOSLOGFMT("printf_only"), uniqid, seqno, total_seqno);
+ checksum = crc32(0, databuffer, datalen);
+ printf(TESTOSLOG("printf_only") "mat%llu\n", checksum, uniqid, seqno, total_seqno, a);
+
+ datalen = snprintf(databuffer, sizeof(databuffer), "kernel^0^test^printf_only#mat%llu", a);
+ match_count = find_pattern_in_buffer(databuffer, datalen, total_seqno);
+ T_EXPECT_EQ_UINT(match_count, 2, "verify printf_only goes to systemlog buffer");
+
+ uint32_t logging_config = atm_get_diagnostic_config();
+ T_LOG("checking atm_diagnostic_config 0x%X", logging_config);
+
+ if ((logging_config & ATM_TRACE_OFF) || (logging_config & ATM_TRACE_DISABLE)) {
+ T_LOG("ATM_TRACE_OFF / ATM_TRACE_DISABLE is set. Would not see oslog messages. skipping the rest of test.");
+ return KERN_SUCCESS;
+ }
+
+ /* for enabled logging printfs should be saved in oslog as well */
+ T_EXPECT_GE_UINT((oslog_p_total_msgcount - total_msg), 2, "atleast 2 msgs should be seen by oslog system");
+
+ a = mach_absolute_time();
+ total_seqno = 1;
+ seqno = 1;
+ total_msg = oslog_p_total_msgcount;
+ saved_msg = oslog_p_saved_msgcount;
+ dropped_msg = oslog_p_dropped_msgcount;
+ datalen = snprintf(databuffer, sizeof(databuffer), TESTOSLOGFMT("oslog_info"), uniqid, seqno, total_seqno);
+ checksum = crc32(0, databuffer, datalen);
+ os_log_info(log_handle, TESTOSLOG("oslog_info") "mat%llu", checksum, uniqid, seqno, total_seqno, a);
+ T_EXPECT_GE_UINT((oslog_p_total_msgcount - total_msg), 1, "total message count in buffer");
+
+ datalen = snprintf(databuffer, sizeof(databuffer), "kernel^0^test^oslog_info#mat%llu", a);
+ match_count = find_pattern_in_buffer(databuffer, datalen, total_seqno);
+ T_EXPECT_EQ_UINT(match_count, 1, "verify oslog_info does not go to systemlog buffer");
+
+ total_msg = oslog_p_total_msgcount;
+ test_oslog_info_helper(uniqid, 10);
+ T_EXPECT_GE_UINT(oslog_p_total_msgcount - total_msg, 10, "test_oslog_info_helper: Should have seen 10 msgs");
+
+ total_msg = oslog_p_total_msgcount;
+ test_oslog_debug_helper(uniqid, 10);
+ T_EXPECT_GE_UINT(oslog_p_total_msgcount - total_msg, 10, "test_oslog_debug_helper:Should have seen 10 msgs");
+
+ total_msg = oslog_p_total_msgcount;
+ test_oslog_error_helper(uniqid, 10);
+ T_EXPECT_GE_UINT(oslog_p_total_msgcount - total_msg, 10, "test_oslog_error_helper:Should have seen 10 msgs");
+
+ total_msg = oslog_p_total_msgcount;
+ test_oslog_default_helper(uniqid, 10);
+ T_EXPECT_GE_UINT(oslog_p_total_msgcount - total_msg, 10, "test_oslog_default_helper:Should have seen 10 msgs");
+
+ total_msg = oslog_p_total_msgcount;
+ test_oslog_fault_helper(uniqid, 10);
+ T_EXPECT_GE_UINT(oslog_p_total_msgcount - total_msg, 10, "test_oslog_fault_helper:Should have seen 10 msgs");
+
+ T_LOG("oslog internal counters total %u , saved %u, dropped %u", oslog_p_total_msgcount, oslog_p_saved_msgcount,
+ oslog_p_dropped_msgcount);
+
+ return KERN_SUCCESS;
}
+static uint32_t _test_log_loop_count = 0;
+void
+_test_log_loop(void * arg __unused, wait_result_t wres __unused)
+{
+ uint32_t uniqid = RandomULong();
+ test_oslog_debug_helper(uniqid, 100);
+ os_atomic_add(&_test_log_loop_count, 100, relaxed);
+}
+
+kern_return_t
+test_os_log_parallel(void)
+{
+ thread_t thread[2];
+ kern_return_t kr;
+ uint32_t uniqid = RandomULong();
+
+ printf("oslog internal counters total %u , saved %u, dropped %u", oslog_p_total_msgcount, oslog_p_saved_msgcount,
+ oslog_p_dropped_msgcount);
+
+ kr = kernel_thread_start(_test_log_loop, NULL, &thread[0]);
+ T_ASSERT_EQ_INT(kr, KERN_SUCCESS, "kernel_thread_start returned successfully");
+
+ kr = kernel_thread_start(_test_log_loop, NULL, &thread[1]);
+ T_ASSERT_EQ_INT(kr, KERN_SUCCESS, "kernel_thread_start returned successfully");
+
+ test_oslog_info_helper(uniqid, 100);
+
+ /* wait until other thread has also finished */
+ while (_test_log_loop_count < 200) {
+ delay(1000);
+ }
+
+ thread_deallocate(thread[0]);
+ thread_deallocate(thread[1]);
+
+ T_LOG("oslog internal counters total %u , saved %u, dropped %u", oslog_p_total_msgcount, oslog_p_saved_msgcount,
+ oslog_p_dropped_msgcount);
+ T_PASS("parallel_logging tests is now complete");
+
+ return KERN_SUCCESS;
+}
+
+void
+test_oslog_handleOSLogCtl(int32_t * in, int32_t * out, int32_t len)
+{
+ if (!in || !out || len != 4) {
+ return;
+ }
+ switch (in[0]) {
+ case 1:
+ {
+ /* send out counters */
+ out[1] = oslog_p_total_msgcount;
+ out[2] = oslog_p_saved_msgcount;
+ out[3] = oslog_p_dropped_msgcount;
+ out[0] = KERN_SUCCESS;
+ break;
+ }
+ case 2:
+ {
+ /* mini stress run */
+ out[0] = test_os_log_parallel();
+ break;
+ }
+ case 3:
+ {
+ /* drop msg tests */
+ out[1] = RandomULong();
+ out[0] = test_stresslog_dropmsg(out[1]);
+ break;
+ }
+ case 4:
+ {
+ /* invoke log helpers */
+ uint32_t uniqid = in[3];
+ int32_t msgcount = in[2];
+ if (uniqid == 0 || msgcount == 0) {
+ out[0] = KERN_INVALID_VALUE;
+ return;
+ }
+
+ switch (in[1]) {
+ case OS_LOG_TYPE_INFO: test_oslog_info_helper(uniqid, msgcount); break;
+ case OS_LOG_TYPE_DEBUG: test_oslog_debug_helper(uniqid, msgcount); break;
+ case OS_LOG_TYPE_ERROR: test_oslog_error_helper(uniqid, msgcount); break;
+ case OS_LOG_TYPE_FAULT: test_oslog_fault_helper(uniqid, msgcount); break;
+ case OS_LOG_TYPE_DEFAULT:
+ default: test_oslog_default_helper(uniqid, msgcount); break;
+ }
+ out[0] = KERN_SUCCESS;
+ break;
+ /* end of case 4 */
+ }
+ default:
+ {
+ out[0] = KERN_INVALID_VALUE;
+ break;
+ }
+ }
+ return;
+}
+
+kern_return_t
+test_stresslog_dropmsg(uint32_t uniqid)
+{
+ uint32_t total, saved, dropped;
+ total = oslog_p_total_msgcount;
+ saved = oslog_p_saved_msgcount;
+ dropped = oslog_p_dropped_msgcount;
+ uniqid = RandomULong();
+ test_oslog_debug_helper(uniqid, 100);
+ while ((oslog_p_dropped_msgcount - dropped) == 0) {
+ test_oslog_debug_helper(uniqid, 100);
+ }
+ printf("test_stresslog_dropmsg: logged %u msgs, saved %u and caused a drop of %u msgs. \n", oslog_p_total_msgcount - total,
+ oslog_p_saved_msgcount - saved, oslog_p_dropped_msgcount - dropped);
+ return KERN_SUCCESS;
+}
+
+#endif
projects / apple / xnu.git / blobdiff