X-Git-Url: https://git.saurik.com/apple/xnu.git/blobdiff_plain/fe8ab488e9161c46dd9885d58fc52996dc0249ff..bb59bff194111743b33cc36712410b5656329d3c:/bsd/kern/kdebug.c diff --git a/bsd/kern/kdebug.c b/bsd/kern/kdebug.c index a9dad0b4e..65c98080d 100644 --- a/bsd/kern/kdebug.c +++ b/bsd/kern/kdebug.c @@ -74,6 +74,14 @@ #include +extern boolean_t kdebug_serial; +#if KDEBUG_MOJO_TRACE +#include +static void kdebug_serial_print( /* forward */ + uint32_t, uint32_t, uint64_t, + uintptr_t, uintptr_t, uintptr_t, uintptr_t, uintptr_t); +#endif + /* * IOP(s) * @@ -113,6 +121,7 @@ static kd_iop_t* kd_iops = NULL; /* XXX should have prototypes, but Mach does not provide one */ void task_act_iterate_wth_args(task_t, void(*)(thread_t, void *), void *); int cpu_number(void); /* XXX include path broken */ +void commpage_update_kdebug_enable(void); /* XXX sign */ /* XXX should probably be static, but it's debugging code... */ int kdbg_read(user_addr_t, size_t *, vnode_t, vfs_context_t); @@ -301,7 +310,6 @@ pid_t global_state_pid = -1; /* Used to control exclusive use of kd_buffer #define MACH_SysCall 0x010c0000 #define DBG_SCALL_MASK 0xffff0000 - /* task to string structure */ struct tts { @@ -391,15 +399,16 @@ kdbg_set_tracing_enabled(boolean_t enabled, uint32_t trace_type) { int s = ml_set_interrupts_enabled(FALSE); lck_spin_lock(kds_spin_lock); - if (enabled) { kdebug_enable |= trace_type; kd_ctrl_page.kdebug_slowcheck &= ~SLOW_NOLOG; kd_ctrl_page.enabled = 1; + commpage_update_kdebug_enable(); } else { kdebug_enable &= ~(KDEBUG_ENABLE_TRACE|KDEBUG_ENABLE_PPT); kd_ctrl_page.kdebug_slowcheck |= SLOW_NOLOG; kd_ctrl_page.enabled = 0; + commpage_update_kdebug_enable(); } lck_spin_unlock(kds_spin_lock); ml_set_interrupts_enabled(s); @@ -734,6 +743,7 @@ allocate_storage_unit(int cpu) if (kdbp_vict == NULL) { kdebug_enable = 0; kd_ctrl_page.enabled = 0; + commpage_update_kdebug_enable(); retval = FALSE; goto out; } @@ -877,6 +887,12 @@ record_event: kdbp = &kdbip[coreid]; timestamp &= KDBG_TIMESTAMP_MASK; +#if KDEBUG_MOJO_TRACE + if (kdebug_enable & KDEBUG_ENABLE_SERIAL) + kdebug_serial_print(coreid, debugid, timestamp, + arg1, arg2, arg3, arg4, threadid); +#endif + retry_q: kds_raw = kdbp->kd_list_tail; @@ -952,16 +968,7 @@ out1: -void -kernel_debug_internal( - uint32_t debugid, - uintptr_t arg1, - uintptr_t arg2, - uintptr_t arg3, - uintptr_t arg4, - uintptr_t arg5); - -__attribute__((always_inline)) void +static void kernel_debug_internal( uint32_t debugid, uintptr_t arg1, @@ -1062,6 +1069,14 @@ record_event: cpu = cpu_number(); kdbp = &kdbip[cpu]; + +#if KDEBUG_MOJO_TRACE + if (kdebug_enable & KDEBUG_ENABLE_SERIAL) + kdebug_serial_print(cpu, debugid, + mach_absolute_time() & KDBG_TIMESTAMP_MASK, + arg1, arg2, arg3, arg4, arg5); +#endif + retry_q: kds_raw = kdbp->kd_list_tail; @@ -1173,7 +1188,7 @@ kernel_debug_string(const char *message) /* Stuff the message string in the args and log it. */ strncpy((char *)arg, message, MIN(sizeof(arg), strlen(message))); KERNEL_DEBUG_EARLY( - (TRACEDBG_CODE(DBG_TRACE_INFO, 4)) | DBG_FUNC_NONE, + TRACE_INFO_STRING, arg[0], arg[1], arg[2], arg[3]); } @@ -1191,8 +1206,10 @@ kernel_debug_early( uintptr_t arg4) { /* If tracing is already initialized, use it */ - if (nkdbufs) + if (nkdbufs) { KERNEL_DEBUG_CONSTANT(debugid, arg1, arg2, arg3, arg4, 0); + return; + } /* Do nothing if the buffer is full or we're not on the boot cpu */ kd_early_overflow = kd_early_index >= KD_EARLY_BUFFER_MAX; @@ -1211,7 +1228,7 @@ kernel_debug_early( } /* - * Transfer the contents of the temporary buffer into the trace buffers. + * Transfen the contents of the temporary buffer into the trace buffers. * Precede that by logging the rebase time (offset) - the TSC-based time (in ns) * when mach_absolute_time is set to 0. */ @@ -1226,7 +1243,7 @@ kernel_debug_early_end(void) /* Fake sentinel marking the start of kernel time relative to TSC */ kernel_debug_enter( 0, - (TRACEDBG_CODE(DBG_TRACE_INFO, 1)) | DBG_FUNC_NONE, + TRACE_TIMESTAMPS, 0, (uint32_t)(tsc_rebase_abs_time >> 32), (uint32_t)tsc_rebase_abs_time, @@ -1248,27 +1265,55 @@ kernel_debug_early_end(void) /* Cut events-lost event on overflow */ if (kd_early_overflow) KERNEL_DEBUG_CONSTANT( - TRACEDBG_CODE(DBG_TRACE_INFO, 2), 0, 0, 0, 0, 0); + TRACE_LOST_EVENTS, 0, 0, 0, 0, 0); /* This trace marks the start of kernel tracing */ kernel_debug_string("early trace done"); } /* - * Support syscall SYS_kdebug_trace + * Support syscall SYS_kdebug_trace. U64->K32 args may get truncated in kdebug_trace64 */ int -kdebug_trace(__unused struct proc *p, struct kdebug_trace_args *uap, __unused int32_t *retval) +kdebug_trace(struct proc *p, struct kdebug_trace_args *uap, int32_t *retval) +{ + struct kdebug_trace64_args uap64; + + uap64.code = uap->code; + uap64.arg1 = uap->arg1; + uap64.arg2 = uap->arg2; + uap64.arg3 = uap->arg3; + uap64.arg4 = uap->arg4; + + return kdebug_trace64(p, &uap64, retval); +} + +/* + * Support syscall SYS_kdebug_trace64. 64-bit args on K32 will get truncated to fit in 32-bit record format. + */ +int kdebug_trace64(__unused struct proc *p, struct kdebug_trace64_args *uap, __unused int32_t *retval) { + uint8_t code_class; + + /* + * Not all class are supported for injection from userspace, especially ones used by the core + * kernel tracing infrastructure. + */ + code_class = EXTRACT_CLASS(uap->code); + + switch (code_class) { + case DBG_TRACE: + return EPERM; + } + if ( __probable(kdebug_enable == 0) ) - return(0); - - kernel_debug_internal(uap->code, uap->arg1, uap->arg2, uap->arg3, uap->arg4, (uintptr_t)thread_tid(current_thread())); + return(0); + + kernel_debug_internal(uap->code, (uintptr_t)uap->arg1, (uintptr_t)uap->arg2, (uintptr_t)uap->arg3, (uintptr_t)uap->arg4, (uintptr_t)thread_tid(current_thread())); return(0); } - static void kdbg_lock_init(void) { @@ -2430,9 +2475,9 @@ kdbg_control(int *name, u_int namelen, user_addr_t where, size_t *sizep) if (name[0] == KERN_KDWRITETR) { number = nkdbufs * sizeof(kd_buf); - KERNEL_DEBUG_CONSTANT((TRACEDBG_CODE(DBG_TRACE_INFO, 3)) | DBG_FUNC_START, 0, 0, 0, 0, 0); + KERNEL_DEBUG_CONSTANT(TRACE_WRITING_EVENTS | DBG_FUNC_START, 0, 0, 0, 0, 0); ret = kdbg_read(0, &number, vp, &context); - KERNEL_DEBUG_CONSTANT((TRACEDBG_CODE(DBG_TRACE_INFO, 3)) | DBG_FUNC_END, number, 0, 0, 0, 0); + KERNEL_DEBUG_CONSTANT(TRACE_WRITING_EVENTS | DBG_FUNC_END, number, 0, 0, 0, 0); *sizep = number; } else { @@ -2612,7 +2657,7 @@ kdbg_read(user_addr_t buffer, size_t *number, vnode_t vp, vfs_context_t ctx) return EINVAL; memset(&lostevent, 0, sizeof(lostevent)); - lostevent.debugid = TRACEDBG_CODE(DBG_TRACE_INFO, 2); + lostevent.debugid = TRACE_LOST_EVENTS; /* Capture timestamp. Only sort events that have occured before the timestamp. * Since the iop is being flushed here, its possible that events occur on the AP @@ -3084,7 +3129,11 @@ start_kern_tracing(unsigned int new_nkdbufs, boolean_t need_map) /* Hold off interrupts until the early traces are cut */ boolean_t s = ml_set_interrupts_enabled(FALSE); - kdbg_set_tracing_enabled(TRUE, KDEBUG_ENABLE_TRACE); + kdbg_set_tracing_enabled( + TRUE, + kdebug_serial ? + (KDEBUG_ENABLE_TRACE | KDEBUG_ENABLE_SERIAL) : + KDEBUG_ENABLE_TRACE); /* * Transfer all very early events from the static buffer @@ -3095,8 +3144,14 @@ start_kern_tracing(unsigned int new_nkdbufs, boolean_t need_map) ml_set_interrupts_enabled(s); printf("kernel tracing started\n"); +#if KDEBUG_MOJO_TRACE + if (kdebug_serial) { + printf("serial output enabled with %lu named events\n", + sizeof(kd_events)/sizeof(kd_event_t)); + } +#endif } else { - printf("error from kdbg_reinit,kernel tracing not started\n"); + printf("error from kdbg_reinit, kernel tracing not started\n"); } } @@ -3140,13 +3195,15 @@ kdbg_dump_trace_to_file(const char *filename) */ kdebug_enable = 0; kd_ctrl_page.enabled = 0; + commpage_update_kdebug_enable(); return; } } - KERNEL_DEBUG_CONSTANT((TRACEDBG_CODE(DBG_TRACE_INFO, 0)) | DBG_FUNC_NONE, 0, 0, 0, 0, 0); + KERNEL_DEBUG_CONSTANT(TRACE_PANIC | DBG_FUNC_NONE, 0, 0, 0, 0, 0); kdebug_enable = 0; kd_ctrl_page.enabled = 0; + commpage_update_kdebug_enable(); ctx = vfs_context_kernel(); @@ -3184,3 +3241,146 @@ void kdbg_get_task_name(char* name_buf, int len, task_t task) else snprintf(name_buf, len, "%p [!bsd]", task); } + +#if KDEBUG_MOJO_TRACE +static kd_event_t * +binary_search(uint32_t id) +{ + int low, high, mid; + + low = 0; + high = sizeof(kd_events)/sizeof(kd_event_t) - 1; + + while (TRUE) + { + mid = (low + high) / 2; + + if (low > high) + return NULL; /* failed */ + else if ( low + 1 >= high) { + /* We have a match */ + if (kd_events[high].id == id) + return &kd_events[high]; + else if (kd_events[low].id == id) + return &kd_events[low]; + else + return NULL; /* search failed */ + } + else if (id < kd_events[mid].id) + high = mid; + else + low = mid; + } +} + +/* + * Look up event id to get name string. + * Using a per-cpu cache of a single entry + * before resorting to a binary search of the full table. + */ +#define NCACHE 1 +static kd_event_t *last_hit[MAX_CPUS]; +static kd_event_t * +event_lookup_cache(uint32_t cpu, uint32_t id) +{ + if (last_hit[cpu] == NULL || last_hit[cpu]->id != id) + last_hit[cpu] = binary_search(id); + return last_hit[cpu]; +} + +static uint64_t kd_last_timstamp; + +static void +kdebug_serial_print( + uint32_t cpunum, + uint32_t debugid, + uint64_t timestamp, + uintptr_t arg1, + uintptr_t arg2, + uintptr_t arg3, + uintptr_t arg4, + uintptr_t threadid + ) +{ + char kprintf_line[192]; + char event[40]; + uint64_t us = timestamp / NSEC_PER_USEC; + uint64_t us_tenth = (timestamp % NSEC_PER_USEC) / 100; + uint64_t delta = timestamp - kd_last_timstamp; + uint64_t delta_us = delta / NSEC_PER_USEC; + uint64_t delta_us_tenth = (delta % NSEC_PER_USEC) / 100; + uint32_t event_id = debugid & DBG_FUNC_MASK; + const char *command; + const char *bra; + const char *ket; + kd_event_t *ep; + + /* event time and delta from last */ + snprintf(kprintf_line, sizeof(kprintf_line), + "%11llu.%1llu %8llu.%1llu ", + us, us_tenth, delta_us, delta_us_tenth); + + + /* event (id or name) - start prefixed by "[", end postfixed by "]" */ + bra = (debugid & DBG_FUNC_START) ? "[" : " "; + ket = (debugid & DBG_FUNC_END) ? "]" : " "; + ep = event_lookup_cache(cpunum, event_id); + if (ep) { + if (strlen(ep->name) < sizeof(event) - 3) + snprintf(event, sizeof(event), "%s%s%s", + bra, ep->name, ket); + else + snprintf(event, sizeof(event), "%s%x(name too long)%s", + bra, event_id, ket); + } else { + snprintf(event, sizeof(event), "%s%x%s", + bra, event_id, ket); + } + snprintf(kprintf_line + strlen(kprintf_line), + sizeof(kprintf_line) - strlen(kprintf_line), + "%-40s ", event); + + /* arg1 .. arg4 with special cases for strings */ + switch (event_id) { + case VFS_LOOKUP: + case VFS_LOOKUP_DONE: + if (debugid & DBG_FUNC_START) { + /* arg1 hex then arg2..arg4 chars */ + snprintf(kprintf_line + strlen(kprintf_line), + sizeof(kprintf_line) - strlen(kprintf_line), + "%-16lx %-8s%-8s%-8s ", + arg1, (char*)&arg2, (char*)&arg3, (char*)&arg4); + break; + } + /* else fall through for arg1..arg4 chars */ + case TRACE_STRING_EXEC: + case TRACE_STRING_NEWTHREAD: + case TRACE_INFO_STRING: + snprintf(kprintf_line + strlen(kprintf_line), + sizeof(kprintf_line) - strlen(kprintf_line), + "%-8s%-8s%-8s%-8s ", + (char*)&arg1, (char*)&arg2, (char*)&arg3, (char*)&arg4); + break; + default: + snprintf(kprintf_line + strlen(kprintf_line), + sizeof(kprintf_line) - strlen(kprintf_line), + "%-16lx %-16lx %-16lx %-16lx", + arg1, arg2, arg3, arg4); + } + + /* threadid, cpu and command name */ + if (threadid == (uintptr_t)thread_tid(current_thread()) && + current_proc() && + current_proc()->p_comm) + command = current_proc()->p_comm; + else + command = "-"; + snprintf(kprintf_line + strlen(kprintf_line), + sizeof(kprintf_line) - strlen(kprintf_line), + " %-16lx %-2d %s\n", + threadid, cpunum, command); + + kprintf("%s", kprintf_line); + kd_last_timstamp = timestamp; +} +#endif