#include <mach_assert.h>
#include <mach_kdp.h>
#include <kdp/kdp.h>
#include <kdp/kdp_core.h>
#include <kdp/kdp_internal.h>
#include <kdp/kdp_callout.h>
#include <kern/cpu_number.h>
#include <kern/kalloc.h>
#include <kern/spl.h>
#include <kern/thread.h>
#include <kern/assert.h>
#include <kern/sched_prim.h>
#include <kern/misc_protos.h>
#include <kern/clock.h>
#include <kern/telemetry.h>
#include <kern/ecc.h>
#include <kern/kern_cdata.h>
#include <kern/zalloc.h>
#include <vm/vm_kern.h>
#include <vm/pmap.h>
#include <stdarg.h>
#include <stdatomic.h>
#include <sys/pgo.h>
#include <console/serial_protos.h>
#if !(MACH_KDP && CONFIG_KDP_INTERACTIVE_DEBUGGING)
#include <kdp/kdp_udp.h>
#endif
#include <kern/processor.h>
#if defined(__i386__) || defined(__x86_64__)
#include <i386/cpu_threads.h>
#include <i386/pmCPU.h>
#endif
#include <IOKit/IOPlatformExpert.h>
#include <machine/pal_routines.h>
#include <sys/kdebug.h>
#include <libkern/OSKextLibPrivate.h>
#include <libkern/OSAtomic.h>
#include <libkern/kernel_mach_header.h>
#include <libkern/section_keywords.h>
#include <uuid/uuid.h>
#include <mach_debug/zone_info.h>
#include <os/log_private.h>
#if CONFIG_EMBEDDED
#include <pexpert/pexpert.h>
#include <arm/caches_internal.h>
#include <arm/misc_protos.h>
extern volatile struct xnu_hw_shmem_dbg_command_info *hwsd_info;
#endif
unsigned int halt_in_debugger = 0;
unsigned int current_debugger = 0;
unsigned int active_debugger = 0;
unsigned int panicDebugging = FALSE;
unsigned int kdebug_serial = FALSE;
unsigned int kernel_debugger_entry_count = 0;
#if defined(__arm__)
#define TRAP_DEBUGGER __asm__ volatile("trap")
#elif defined(__arm64__)
#define TRAP_DEBUGGER __asm__ volatile(".long 0xe7ffdeff")
#elif defined (__x86_64__)
#define TRAP_DEBUGGER __asm__("int3")
#else
#error No TRAP_DEBUGGER for this architecture
#endif
#if defined(__i386__) || defined(__x86_64__)
#define panic_stop() pmCPUHalt(PM_HALT_PANIC)
#else
#define panic_stop() panic_spin_forever()
#endif
#define CPUDEBUGGEROP PROCESSOR_DATA(current_processor(), debugger_state).db_current_op
#define CPUDEBUGGERMSG PROCESSOR_DATA(current_processor(), debugger_state).db_message
#define CPUPANICSTR PROCESSOR_DATA(current_processor(), debugger_state).db_panic_str
#define CPUPANICARGS PROCESSOR_DATA(current_processor(), debugger_state).db_panic_args
#define CPUPANICOPTS PROCESSOR_DATA(current_processor(), debugger_state).db_panic_options
#define CPUDEBUGGERSYNC PROCESSOR_DATA(current_processor(), debugger_state).db_proceed_on_sync_failure
#define CPUDEBUGGERCOUNT PROCESSOR_DATA(current_processor(), debugger_state).db_entry_count
#define CPUDEBUGGERRET PROCESSOR_DATA(current_processor(), debugger_state).db_op_return
#define CPUPANICCALLER PROCESSOR_DATA(current_processor(), debugger_state).db_panic_caller
#if DEVELOPMENT || DEBUG
#define DEBUGGER_DEBUGGING_NESTED_PANIC_IF_REQUESTED(requested) \
MACRO_BEGIN \
if (requested) { \
volatile int *badpointer = (int *)4; \
*badpointer = 0; \
} \
MACRO_END
#endif
debugger_op debugger_current_op = DBOP_NONE;
const char *debugger_panic_str = NULL;
va_list *debugger_panic_args = NULL;
uint64_t debugger_panic_options = 0;
const char *debugger_message = NULL;
unsigned long debugger_panic_caller = 0;
void panic_trap_to_debugger(const char *panic_format_str, va_list *panic_args, unsigned int reason, void *ctx, uint64_t panic_options_mask, unsigned long panic_caller);
static void kdp_machine_reboot_type(unsigned int type);
__attribute__((noreturn)) void panic_spin_forever(void);
extern kern_return_t do_stackshot(void);
int mach_assert = 1;
#define NESTEDDEBUGGERENTRYMAX 5
#if CONFIG_EMBEDDED
#define DEBUG_BUF_SIZE (4096)
#define KDBG_TRACE_PANIC_FILENAME "/var/log/panic.trace"
#else
#define DEBUG_BUF_SIZE ((3 * PAGE_SIZE) + offsetof(struct macos_panic_header, mph_data))
#define EXTENDED_DEBUG_BUF_SIZE 0x0013ff80
static_assert(((EXTENDED_DEBUG_BUF_SIZE % PANIC_FLUSH_BOUNDARY) == 0), "Extended debug buf size must match SMC alignment requirements");
#define KDBG_TRACE_PANIC_FILENAME "/var/tmp/panic.trace"
#endif
#if CONFIG_EMBEDDED
char *debug_buf_base = NULL;
char *debug_buf_ptr = NULL;
unsigned int debug_buf_size = 0;
#else
char debug_buf[DEBUG_BUF_SIZE];
struct macos_panic_header *panic_info = (struct macos_panic_header *)debug_buf;
char *debug_buf_base = (debug_buf + offsetof(struct macos_panic_header, mph_data));
char *debug_buf_ptr = (debug_buf + offsetof(struct macos_panic_header, mph_data));
unsigned int debug_buf_size = (DEBUG_BUF_SIZE - offsetof(struct macos_panic_header, mph_data));
boolean_t extended_debug_log_enabled = FALSE;
#endif
atomic_int debugger_cpu = ATOMIC_VAR_INIT(DEBUGGER_NO_CPU);
boolean_t debugger_allcpus_halted = FALSE;
boolean_t debugger_safe_to_return = TRUE;
unsigned int debugger_context = 0;
static char model_name[64];
unsigned char *kernel_uuid;
static boolean_t debugger_is_panic = TRUE;
#if DEVELOPMENT || DEBUG
boolean_t debug_boot_arg_inited = FALSE;
#endif
SECURITY_READ_ONLY_LATE(unsigned int) debug_boot_arg;
char kernel_uuid_string[37];
char panic_disk_error_description[512];
size_t panic_disk_error_description_size = sizeof(panic_disk_error_description);
extern unsigned int write_trace_on_panic;
int kext_assertions_enable =
#if DEBUG || DEVELOPMENT
TRUE;
#else
FALSE;
#endif
void
panic_init(void)
{
unsigned long uuidlen = 0;
void *uuid;
uuid = getuuidfromheader(&_mh_execute_header, &uuidlen);
if ((uuid != NULL) && (uuidlen == sizeof(uuid_t))) {
kernel_uuid = uuid;
uuid_unparse_upper(*(uuid_t *)uuid, kernel_uuid_string);
}
if (!PE_parse_boot_argn("assertions", &mach_assert, sizeof(mach_assert))) {
mach_assert = 1;
}
debug_boot_arg = 0;
#if ((CONFIG_EMBEDDED && MACH_KDP) || defined(__x86_64__))
if (PE_parse_boot_argn("debug", &debug_boot_arg, sizeof (debug_boot_arg))) {
#if DEVELOPMENT || DEBUG
if (debug_boot_arg & DB_HALT) {
halt_in_debugger=1;
}
#endif
#if CONFIG_EMBEDDED
if (debug_boot_arg & DB_NMI) {
panicDebugging = TRUE;
}
#else
panicDebugging = TRUE;
#if KDEBUG_MOJO_TRACE
if (debug_boot_arg & DB_PRT_KDEBUG) {
kdebug_serial = TRUE;
}
#endif
#endif
}
#endif
#if DEVELOPMENT || DEBUG
debug_boot_arg_inited = TRUE;
#endif
#if !CONFIG_EMBEDDED
if (PE_i_can_has_debugger(NULL) && !(debug_boot_arg & DB_KERN_DUMP_ON_NMI)) {
debugger_is_panic = FALSE;
}
#endif
}
#if defined (__x86_64__)
void
extended_debug_log_init(void)
{
assert(coprocessor_paniclog_flush);
char *new_debug_buf = kalloc(EXTENDED_DEBUG_BUF_SIZE);
memset(new_debug_buf, '\0', EXTENDED_DEBUG_BUF_SIZE);
panic_info = (struct macos_panic_header *)new_debug_buf;
debug_buf_ptr = debug_buf_base = (new_debug_buf + offsetof(struct macos_panic_header, mph_data));
debug_buf_size = (EXTENDED_DEBUG_BUF_SIZE - offsetof(struct macos_panic_header, mph_data));
extended_debug_log_enabled = TRUE;
}
#endif
void
debug_log_init(void)
{
#if CONFIG_EMBEDDED
if (!gPanicBase) {
printf("debug_log_init: Error!! gPanicBase is still not initialized\n");
return;
}
debug_buf_base = (char *)gPanicBase + sizeof(struct embedded_panic_header);
debug_buf_ptr = debug_buf_base;
debug_buf_size = gPanicSize - sizeof(struct embedded_panic_header);
#else
bzero(panic_info, DEBUG_BUF_SIZE);
assert(debug_buf_base != NULL);
assert(debug_buf_ptr != NULL);
assert(debug_buf_size != 0);
#endif
}
static void
DebuggerLock()
{
int my_cpu = cpu_number();
int debugger_exp_cpu = DEBUGGER_NO_CPU;
assert(ml_get_interrupts_enabled() == FALSE);
if (debugger_cpu == my_cpu) {
return;
}
while(!atomic_compare_exchange_strong(&debugger_cpu, &debugger_exp_cpu, my_cpu)) {
debugger_exp_cpu = DEBUGGER_NO_CPU;
}
return;
}
static void
DebuggerUnlock()
{
assert(debugger_cpu == cpu_number());
debugger_cpu = DEBUGGER_NO_CPU;
OSMemoryBarrier();
return;
}
static kern_return_t
DebuggerHaltOtherCores(boolean_t proceed_on_failure)
{
#if CONFIG_EMBEDDED
return DebuggerXCallEnter(proceed_on_failure);
#else
#pragma unused(proceed_on_failure)
mp_kdp_enter(proceed_on_failure);
return KERN_SUCCESS;
#endif
}
static void
DebuggerResumeOtherCores()
{
#if CONFIG_EMBEDDED
DebuggerXCallReturn();
#else
mp_kdp_exit();
#endif
}
static void
DebuggerSaveState(debugger_op db_op, const char *db_message, const char *db_panic_str,
va_list *db_panic_args, uint64_t db_panic_options,
boolean_t db_proceed_on_sync_failure, unsigned long db_panic_caller)
{
CPUDEBUGGEROP = db_op;
if (CPUDEBUGGERCOUNT == 1 || CPUPANICSTR == NULL) {
CPUDEBUGGERMSG = db_message;
CPUPANICSTR = db_panic_str;
CPUPANICARGS = db_panic_args;
CPUPANICCALLER = db_panic_caller;
} else if (CPUDEBUGGERCOUNT > 1 && db_panic_str != NULL) {
kprintf("Nested panic detected:");
if (db_panic_str != NULL)
_doprnt(db_panic_str, db_panic_args, PE_kputc, 0);
}
CPUDEBUGGERSYNC = db_proceed_on_sync_failure;
CPUDEBUGGERRET = KERN_SUCCESS;
CPUPANICOPTS = db_panic_options;
return;
}
kern_return_t
DebuggerTrapWithState(debugger_op db_op, const char *db_message, const char *db_panic_str,
va_list *db_panic_args, uint64_t db_panic_options,
boolean_t db_proceed_on_sync_failure, unsigned long db_panic_caller)
{
kern_return_t ret;
assert(ml_get_interrupts_enabled() == FALSE);
DebuggerSaveState(db_op, db_message, db_panic_str,
db_panic_args, db_panic_options, db_proceed_on_sync_failure,
db_panic_caller);
TRAP_DEBUGGER;
ret = CPUDEBUGGERRET;
DebuggerSaveState(DBOP_NONE, NULL, NULL, NULL, 0, FALSE, 0);
return ret;
}
void __attribute__((noinline))
Assert(
const char *file,
int line,
const char *expression
)
{
if (!mach_assert) {
kprintf("%s:%d non-fatal Assertion: %s", file, line, expression);
return;
}
panic_plain("%s:%d Assertion failed: %s", file, line, expression);
}
void
Debugger(const char *message)
{
DebuggerWithContext(0, NULL, message, DEBUGGER_OPTION_NONE);
}
void
DebuggerWithContext(unsigned int reason, void *ctx, const char *message,
uint64_t debugger_options_mask)
{
spl_t previous_interrupts_state;
boolean_t old_doprnt_hide_pointers = doprnt_hide_pointers;
previous_interrupts_state = ml_set_interrupts_enabled(FALSE);
disable_preemption();
CPUDEBUGGERCOUNT++;
if (CPUDEBUGGERCOUNT > NESTEDDEBUGGERENTRYMAX) {
static boolean_t in_panic_kprintf = FALSE;
PEHaltRestart(kPEPanicBegin);
if (!in_panic_kprintf) {
in_panic_kprintf = TRUE;
kprintf("Detected nested debugger entry count exceeding %d\n",
NESTEDDEBUGGERENTRYMAX);
in_panic_kprintf = FALSE;
}
if (!panicDebugging) {
kdp_machine_reboot_type(kPEPanicRestartCPU);
}
panic_spin_forever();
}
#if DEVELOPMENT || DEBUG
DEBUGGER_DEBUGGING_NESTED_PANIC_IF_REQUESTED((debugger_options_mask & DEBUGGER_OPTION_RECURPANIC_ENTRY));
#endif
doprnt_hide_pointers = FALSE;
if (ctx != NULL) {
DebuggerSaveState(DBOP_DEBUGGER, message,
NULL, NULL, debugger_options_mask, TRUE, 0);
handle_debugger_trap(reason, 0, 0, ctx);
DebuggerSaveState(DBOP_NONE, NULL, NULL,
NULL, 0, FALSE, 0);
} else {
DebuggerTrapWithState(DBOP_DEBUGGER, message,
NULL, NULL, debugger_options_mask, TRUE, 0);
}
CPUDEBUGGERCOUNT--;
doprnt_hide_pointers = old_doprnt_hide_pointers;
enable_preemption();
ml_set_interrupts_enabled(previous_interrupts_state);
}
static struct kdp_callout {
struct kdp_callout * callout_next;
kdp_callout_fn_t callout_fn;
boolean_t callout_in_progress;
void * callout_arg;
} * kdp_callout_list = NULL;
void
kdp_register_callout(kdp_callout_fn_t fn, void * arg)
{
struct kdp_callout * kcp;
struct kdp_callout * list_head;
kcp = kalloc(sizeof(*kcp));
if (kcp == NULL)
panic("kdp_register_callout() kalloc failed");
kcp->callout_fn = fn;
kcp->callout_arg = arg;
kcp->callout_in_progress = FALSE;
do {
list_head = kdp_callout_list;
kcp->callout_next = list_head;
} while (!OSCompareAndSwapPtr(list_head, kcp, &kdp_callout_list));
}
static void
kdp_callouts(kdp_event_t event)
{
struct kdp_callout *kcp = kdp_callout_list;
while (kcp) {
if (!kcp->callout_in_progress) {
kcp->callout_in_progress = TRUE;
kcp->callout_fn(kcp->callout_arg, event);
kcp->callout_in_progress = FALSE;
}
kcp = kcp->callout_next;
}
}
#undef panic
void
panic(const char *str, ...)
{
va_list panic_str_args;
va_start(panic_str_args, str);
panic_trap_to_debugger(str, &panic_str_args, 0, NULL, 0, (unsigned long)(char *)__builtin_return_address(0));
va_end(panic_str_args);
}
void
panic_with_options(unsigned int reason, void *ctx, uint64_t debugger_options_mask, const char *str, ...)
{
va_list panic_str_args;
va_start(panic_str_args, str);
panic_trap_to_debugger(str, &panic_str_args, reason, ctx, debugger_options_mask, (unsigned long)(char *)__builtin_return_address(0));
va_end(panic_str_args);
}
void
panic_context(unsigned int reason, void *ctx, const char *str, ...)
{
va_list panic_str_args;
va_start(panic_str_args, str);
panic_trap_to_debugger(str, &panic_str_args, reason, ctx, 0, (unsigned long)(char *)__builtin_return_address(0));
va_end(panic_str_args);
}
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wmissing-noreturn"
void
panic_trap_to_debugger(const char *panic_format_str, va_list *panic_args, unsigned int reason, void
*ctx, uint64_t panic_options_mask, unsigned long panic_caller)
{
#pragma clang diagnostic pop
if (ml_wants_panic_trap_to_debugger()) {
ml_panic_trap_to_debugger(panic_format_str, panic_args, reason, ctx, panic_options_mask, panic_caller);
return;
}
CPUDEBUGGERCOUNT++;
if (CPUDEBUGGERCOUNT > NESTEDDEBUGGERENTRYMAX) {
static boolean_t in_panic_kprintf = FALSE;
PEHaltRestart(kPEPanicBegin);
if (!in_panic_kprintf) {
in_panic_kprintf = TRUE;
kprintf("Detected nested debugger entry count exceeding %d\n",
NESTEDDEBUGGERENTRYMAX);
in_panic_kprintf = FALSE;
}
if (!panicDebugging) {
kdp_machine_reboot_type(kPEPanicRestartCPU);
}
panic_spin_forever();
}
#if DEVELOPMENT || DEBUG
DEBUGGER_DEBUGGING_NESTED_PANIC_IF_REQUESTED((panic_options_mask & DEBUGGER_OPTION_RECURPANIC_ENTRY));
#endif
#if CONFIG_EMBEDDED
if (PE_arm_debug_panic_hook)
PE_arm_debug_panic_hook(panic_format_str);
#endif
#if defined (__x86_64__)
plctrace_disable();
#endif
if (write_trace_on_panic && kdebug_enable) {
if (get_preemption_level() == 0 && !ml_at_interrupt_context()) {
ml_set_interrupts_enabled(TRUE);
KDBG(TRACE_PANIC);
kdbg_dump_trace_to_file(KDBG_TRACE_PANIC_FILENAME);
}
}
ml_set_interrupts_enabled(FALSE);
disable_preemption();
#if defined (__x86_64__)
pmSafeMode(x86_lcpu(), PM_SAFE_FL_SAFE);
#endif
doprnt_hide_pointers = FALSE;
if (ctx != NULL) {
DebuggerSaveState(DBOP_PANIC, "panic",
panic_format_str, panic_args,
panic_options_mask, TRUE, panic_caller);
handle_debugger_trap(reason, 0, 0, ctx);
}
#if defined(__arm64__)
__asm__ volatile("HINT 0x45");
#endif
DebuggerTrapWithState(DBOP_PANIC, "panic", panic_format_str,
panic_args, panic_options_mask, TRUE, panic_caller);
panic_stop();
}
__attribute__((noreturn))
void
panic_spin_forever()
{
paniclog_append_noflush("\nPlease go to https://panic.apple.com to report this panic\n");
for (;;) { }
}
static void
kdp_machine_reboot_type(unsigned int type)
{
printf("Attempting system restart...");
PEHaltRestart(type);
halt_all_cpus(TRUE);
}
void
kdp_machine_reboot(void)
{
kdp_machine_reboot_type(kPEPanicRestartCPU);
}
static void
debugger_collect_diagnostics(unsigned int exception, unsigned int code, unsigned int subcode, void *state)
{
#if DEVELOPMENT || DEBUG
DEBUGGER_DEBUGGING_NESTED_PANIC_IF_REQUESTED((debugger_panic_options & DEBUGGER_OPTION_RECURPANIC_PRELOG));
#endif
#if defined(__x86_64__)
kprintf("Debugger called: <%s>\n", debugger_message ? debugger_message : "");
#endif
if (debugger_current_op == DBOP_DEBUGGER && halt_in_debugger) {
kdp_raise_exception(exception, code, subcode, state);
if (debugger_safe_to_return && !debugger_is_panic) {
return;
}
}
if ((debugger_current_op == DBOP_PANIC) ||
((debugger_current_op == DBOP_DEBUGGER) && debugger_is_panic)) {
PEHaltRestart(kPEPanicBegin);
static boolean_t began_writing_paniclog = FALSE;
if (!began_writing_paniclog) {
PE_init_panicheader();
began_writing_paniclog = TRUE;
} else {
PE_update_panicheader_nestedpanic();
}
}
if (debugger_current_op == DBOP_PANIC) {
paniclog_append_noflush("panic(cpu %d caller 0x%lx): ", (unsigned) cpu_number(), debugger_panic_caller);
if (debugger_panic_str) {
_doprnt(debugger_panic_str, debugger_panic_args, consdebug_putc, 0);
}
paniclog_append_noflush("\n");
}
#if defined(__x86_64__)
else if (((debugger_current_op == DBOP_DEBUGGER) && debugger_is_panic)) {
paniclog_append_noflush("Debugger called: <%s>\n", debugger_message ? debugger_message : "");
}
if (debugger_current_op == DBOP_PANIC || ((debugger_current_op == DBOP_DEBUGGER) && debugger_is_panic))
#endif
{
kdp_callouts(KDP_EVENT_PANICLOG);
SavePanicInfo(debugger_message, debugger_panic_options);
#if DEVELOPMENT || DEBUG
DEBUGGER_DEBUGGING_NESTED_PANIC_IF_REQUESTED((debugger_panic_options & DEBUGGER_OPTION_RECURPANIC_POSTLOG));
#endif
if (debugger_panic_options & DEBUGGER_OPTION_PANICLOGANDREBOOT)
PEHaltRestart(kPEPanicRestartCPU);
}
#if CONFIG_KDP_INTERACTIVE_DEBUGGING
if ((debugger_panic_options & DEBUGGER_OPTION_SKIP_LOCAL_COREDUMP) &&
(debug_boot_arg & DB_REBOOT_POST_CORE)) {
kdp_machine_reboot_type(kPEPanicRestartCPU);
}
if (kdp_has_polled_corefile() && !(debug_boot_arg & DB_DISABLE_LOCAL_CORE)) {
int ret = -1;
#if defined (__x86_64__)
if (debugger_current_op != DBOP_DEBUGGER || (debug_boot_arg & DB_KERN_DUMP_ON_NMI))
#endif
{
debugger_safe_to_return = FALSE;
begin_panic_transfer();
ret = kern_dump(KERN_DUMP_DISK);
abort_panic_transfer();
#if DEVELOPMENT || DEBUG
DEBUGGER_DEBUGGING_NESTED_PANIC_IF_REQUESTED((debugger_panic_options & DEBUGGER_OPTION_RECURPANIC_POSTCORE));
#endif
}
if (ret == 0 && (debug_boot_arg & DB_REBOOT_POST_CORE)) {
kdp_machine_reboot_type(kPEPanicRestartCPU);
}
}
if (debug_boot_arg & DB_REBOOT_ALWAYS) {
kdp_machine_reboot_type(kPEPanicRestartCPU);
}
if (current_debugger != NO_CUR_DB) {
kdp_raise_exception(exception, code, subcode, state);
if (debugger_current_op == DBOP_DEBUGGER &&
debugger_safe_to_return &&
kernel_debugger_entry_count == 1 &&
!debugger_is_panic) {
return;
}
}
#if CONFIG_EMBEDDED
if (panicDebugging) {
panic_spin_shmcon();
}
#endif
#endif
if (!panicDebugging) {
kdp_machine_reboot_type(kPEPanicRestartCPU);
}
panic_spin_forever();
}
#if INTERRUPT_MASKED_DEBUG
uint64_t debugger_trap_timestamps[9];
# define DEBUGGER_TRAP_TIMESTAMP(i) debugger_trap_timestamps[i] = mach_absolute_time();
#else
# define DEBUGGER_TRAP_TIMESTAMP(i)
#endif
void
handle_debugger_trap(unsigned int exception, unsigned int code, unsigned int subcode, void *state)
{
unsigned int initial_not_in_kdp = not_in_kdp;
kern_return_t ret;
debugger_op db_prev_op = debugger_current_op;
DEBUGGER_TRAP_TIMESTAMP(0);
DebuggerLock();
ret = DebuggerHaltOtherCores(CPUDEBUGGERSYNC);
DEBUGGER_TRAP_TIMESTAMP(1);
#if INTERRUPT_MASKED_DEBUG
if (serialmode & SERIALMODE_OUTPUT) {
ml_spin_debug_reset(current_thread());
}
#endif
if (ret != KERN_SUCCESS) {
CPUDEBUGGERRET = ret;
DebuggerUnlock();
return;
}
kernel_debugger_entry_count = CPUDEBUGGERCOUNT;
if (CPUDEBUGGEROP == DBOP_NONE) {
debugger_current_op = DBOP_BREAKPOINT;
} else {
if (debugger_current_op == DBOP_PANIC ||
debugger_current_op == DBOP_DEBUGGER) {
debugger_safe_to_return = FALSE;
}
debugger_current_op = CPUDEBUGGEROP;
if (debugger_panic_str == NULL) {
debugger_panic_str = CPUPANICSTR;
debugger_panic_args = CPUPANICARGS;
debugger_message = CPUDEBUGGERMSG;
debugger_panic_caller = CPUPANICCALLER;
}
debugger_panic_options = CPUPANICOPTS;
}
CPUDEBUGGEROP = DBOP_NONE;
DEBUGGER_TRAP_TIMESTAMP(2);
kdp_callouts(KDP_EVENT_ENTER);
not_in_kdp = 0;
DEBUGGER_TRAP_TIMESTAMP(3);
if (debugger_current_op == DBOP_BREAKPOINT) {
kdp_raise_exception(exception, code, subcode, state);
} else if (debugger_current_op == DBOP_STACKSHOT) {
CPUDEBUGGERRET = do_stackshot();
#if PGO
} else if (debugger_current_op == DBOP_RESET_PGO_COUNTERS) {
CPUDEBUGGERRET = do_pgo_reset_counters();
#endif
} else {
debugger_collect_diagnostics(exception, code, subcode, state);
}
DEBUGGER_TRAP_TIMESTAMP(4);
not_in_kdp = initial_not_in_kdp;
kdp_callouts(KDP_EVENT_EXIT);
DEBUGGER_TRAP_TIMESTAMP(5);
if (debugger_current_op != DBOP_BREAKPOINT) {
debugger_panic_str = NULL;
debugger_panic_args = NULL;
debugger_panic_options = 0;
debugger_message = NULL;
}
debugger_current_op = db_prev_op;
DEBUGGER_TRAP_TIMESTAMP(6);
DebuggerResumeOtherCores();
DEBUGGER_TRAP_TIMESTAMP(7);
DebuggerUnlock();
DEBUGGER_TRAP_TIMESTAMP(8);
return;
}
__attribute__((noinline,not_tail_called))
void log(__unused int level, char *fmt, ...)
{
void *caller = __builtin_return_address(0);
va_list listp;
va_list listp2;
#ifdef lint
level++;
#endif
#ifdef MACH_BSD
va_start(listp, fmt);
va_copy(listp2, listp);
disable_preemption();
_doprnt(fmt, &listp, cons_putc_locked, 0);
enable_preemption();
va_end(listp);
os_log_with_args(OS_LOG_DEFAULT, OS_LOG_TYPE_DEFAULT, fmt, listp2, caller);
va_end(listp2);
#endif
}
boolean_t
oslog_is_safe(void) {
return (kernel_debugger_entry_count == 0 &&
not_in_kdp == 1 &&
get_preemption_level() == 0 &&
ml_get_interrupts_enabled() == TRUE);
}
boolean_t
debug_mode_active(void)
{
return ((0 != kernel_debugger_entry_count != 0) || (0 == not_in_kdp));
}
void
debug_putc(char c)
{
if ((debug_buf_size != 0) &&
((debug_buf_ptr - debug_buf_base) < (int)debug_buf_size)) {
*debug_buf_ptr=c;
debug_buf_ptr++;
}
}
#if defined (__x86_64__)
struct pasc {
unsigned a: 7;
unsigned b: 7;
unsigned c: 7;
unsigned d: 7;
unsigned e: 7;
unsigned f: 7;
unsigned g: 7;
unsigned h: 7;
} __attribute__((packed));
typedef struct pasc pasc_t;
int
packA(char *inbuf, uint32_t length, uint32_t buflen)
{
unsigned int i, j = 0;
pasc_t pack;
length = MIN(((length + 7) & ~7), buflen);
for (i = 0; i < length; i+=8)
{
pack.a = inbuf[i];
pack.b = inbuf[i+1];
pack.c = inbuf[i+2];
pack.d = inbuf[i+3];
pack.e = inbuf[i+4];
pack.f = inbuf[i+5];
pack.g = inbuf[i+6];
pack.h = inbuf[i+7];
bcopy ((char *) &pack, inbuf + j, 7);
j += 7;
}
return j;
}
void
unpackA(char *inbuf, uint32_t length)
{
pasc_t packs;
unsigned i = 0;
length = (length * 8)/7;
while (i < length) {
packs = *(pasc_t *)&inbuf[i];
bcopy(&inbuf[i+7], &inbuf[i+8], MAX(0, (int) (length - i - 8)));
inbuf[i++] = packs.a;
inbuf[i++] = packs.b;
inbuf[i++] = packs.c;
inbuf[i++] = packs.d;
inbuf[i++] = packs.e;
inbuf[i++] = packs.f;
inbuf[i++] = packs.g;
inbuf[i++] = packs.h;
}
}
#endif
extern void *proc_name_address(void *p);
static void
panic_display_process_name(void) {
char proc_name[17] = "Unknown";
task_t ctask = 0;
void *cbsd_info = 0;
if (ml_nofault_copy((vm_offset_t)¤t_thread()->task, (vm_offset_t) &ctask, sizeof(task_t)) == sizeof(task_t))
if(ml_nofault_copy((vm_offset_t)&ctask->bsd_info, (vm_offset_t)&cbsd_info, sizeof(cbsd_info)) == sizeof(cbsd_info))
if (cbsd_info && (ml_nofault_copy((vm_offset_t) proc_name_address(cbsd_info), (vm_offset_t) &proc_name, sizeof(proc_name)) > 0))
proc_name[sizeof(proc_name) - 1] = '\0';
paniclog_append_noflush("\nBSD process name corresponding to current thread: %s\n", proc_name);
}
unsigned
panic_active(void) {
return ((debugger_panic_str != (char *) 0));
}
void
populate_model_name(char *model_string) {
strlcpy(model_name, model_string, sizeof(model_name));
}
void
panic_display_model_name(void) {
char tmp_model_name[sizeof(model_name)];
if (ml_nofault_copy((vm_offset_t) &model_name, (vm_offset_t) &tmp_model_name, sizeof(model_name)) != sizeof(model_name))
return;
tmp_model_name[sizeof(tmp_model_name) - 1] = '\0';
if (tmp_model_name[0] != 0)
paniclog_append_noflush("System model name: %s\n", tmp_model_name);
}
void
panic_display_kernel_uuid(void) {
char tmp_kernel_uuid[sizeof(kernel_uuid_string)];
if (ml_nofault_copy((vm_offset_t) &kernel_uuid_string, (vm_offset_t) &tmp_kernel_uuid, sizeof(kernel_uuid_string)) != sizeof(kernel_uuid_string))
return;
if (tmp_kernel_uuid[0] != '\0')
paniclog_append_noflush("Kernel UUID: %s\n", tmp_kernel_uuid);
}
void
panic_display_kernel_aslr(void) {
if (vm_kernel_slide) {
paniclog_append_noflush("Kernel slide: 0x%016lx\n", (unsigned long) vm_kernel_slide);
paniclog_append_noflush("Kernel text base: %p\n", (void *) vm_kernel_stext);
}
}
void
panic_display_hibb(void) {
#if defined(__i386__) || defined (__x86_64__)
paniclog_append_noflush("__HIB text base: %p\n", (void *) vm_hib_base);
#endif
}
static void
panic_display_uptime(void) {
uint64_t uptime;
absolutetime_to_nanoseconds(mach_absolute_time(), &uptime);
paniclog_append_noflush("\nSystem uptime in nanoseconds: %llu\n", uptime);
}
static void
panic_display_disk_errors(void) {
if (panic_disk_error_description[0]) {
panic_disk_error_description[sizeof(panic_disk_error_description) - 1] = '\0';
paniclog_append_noflush("Root disk errors: \"%s\"\n", panic_disk_error_description);
}
};
extern const char version[];
extern char osversion[];
static volatile uint32_t config_displayed = 0;
__private_extern__ void
panic_display_system_configuration(boolean_t launchd_exit) {
if (!launchd_exit) panic_display_process_name();
if (OSCompareAndSwap(0, 1, &config_displayed)) {
char buf[256];
if (!launchd_exit && strlcpy(buf, PE_boot_args(), sizeof(buf)))
paniclog_append_noflush("Boot args: %s\n", buf);
paniclog_append_noflush("\nMac OS version:\n%s\n",
(osversion[0] != 0) ? osversion : "Not yet set");
paniclog_append_noflush("\nKernel version:\n%s\n",version);
panic_display_kernel_uuid();
if (!launchd_exit) {
panic_display_kernel_aslr();
panic_display_hibb();
panic_display_pal_info();
}
panic_display_model_name();
panic_display_disk_errors();
if (!launchd_exit) {
panic_display_uptime();
panic_display_zprint();
#if CONFIG_ZLEAKS
panic_display_ztrace();
#endif
kext_dump_panic_lists(&paniclog_append_noflush);
}
}
}
extern unsigned int stack_total;
extern unsigned long long stack_allocs;
#if defined (__x86_64__)
extern unsigned int inuse_ptepages_count;
extern long long alloc_ptepages_count;
#endif
extern boolean_t panic_include_zprint;
extern mach_memory_info_t *panic_kext_memory_info;
extern vm_size_t panic_kext_memory_size;
__private_extern__ void
panic_display_zprint()
{
if(panic_include_zprint == TRUE) {
unsigned int i;
struct zone zone_copy;
paniclog_append_noflush("%-20s %10s %10s\n", "Zone Name", "Cur Size", "Free Size");
for (i = 0; i < num_zones; i++) {
if(ml_nofault_copy((vm_offset_t)(&zone_array[i]), (vm_offset_t)&zone_copy, sizeof(struct zone)) == sizeof(struct zone)) {
if(zone_copy.cur_size > (1024*1024)) {
paniclog_append_noflush("%-20s %10lu %10lu\n",zone_copy.zone_name, (uintptr_t)zone_copy.cur_size,(uintptr_t)(zone_copy.countfree * zone_copy.elem_size));
}
}
}
paniclog_append_noflush("%-20s %10lu\n", "Kernel Stacks", (uintptr_t)(kernel_stack_size * stack_total));
#if defined (__x86_64__)
paniclog_append_noflush("%-20s %10lu\n", "PageTables",(uintptr_t)(PAGE_SIZE * inuse_ptepages_count));
#endif
paniclog_append_noflush("%-20s %10lu\n", "Kalloc.Large", (uintptr_t)kalloc_large_total);
if (panic_kext_memory_info) {
mach_memory_info_t *mem_info = panic_kext_memory_info;
paniclog_append_noflush("\n%-5s %10s\n", "Kmod", "Size");
for (i = 0; i < (panic_kext_memory_size / sizeof(mach_zone_info_t)); i++) {
if (((mem_info[i].flags & VM_KERN_SITE_TYPE) == VM_KERN_SITE_KMOD) && (mem_info[i].size > (1024 * 1024))) {
paniclog_append_noflush("%-5lld %10lld\n", mem_info[i].site, mem_info[i].size);
}
}
}
}
}
#if CONFIG_ECC_LOGGING
__private_extern__ void
panic_display_ecc_errors()
{
uint32_t count = ecc_log_get_correction_count();
if (count > 0) {
paniclog_append_noflush("ECC Corrections:%u\n", count);
}
}
#endif
#if CONFIG_ZLEAKS
extern boolean_t panic_include_ztrace;
extern struct ztrace* top_ztrace;
void panic_print_symbol_name(vm_address_t search);
__private_extern__ void
panic_display_ztrace(void)
{
if(panic_include_ztrace == TRUE) {
unsigned int i = 0;
boolean_t keepsyms = FALSE;
PE_parse_boot_argn("keepsyms", &keepsyms, sizeof (keepsyms));
struct ztrace top_ztrace_copy;
if(ml_nofault_copy((vm_offset_t)top_ztrace, (vm_offset_t)&top_ztrace_copy, sizeof(struct ztrace)) == sizeof(struct ztrace)) {
paniclog_append_noflush("\nBacktrace suspected of leaking: (outstanding bytes: %lu)\n", (uintptr_t)top_ztrace_copy.zt_size);
for (i = 0; (i < top_ztrace_copy.zt_depth && i < MAX_ZTRACE_DEPTH) ; i++) {
paniclog_append_noflush("%p ", top_ztrace_copy.zt_stack[i]);
if (keepsyms) {
panic_print_symbol_name((vm_address_t)top_ztrace_copy.zt_stack[i]);
}
paniclog_append_noflush("\n");
}
kmod_panic_dump((vm_offset_t *)&top_ztrace_copy.zt_stack[0], top_ztrace_copy.zt_depth);
}
else {
paniclog_append_noflush("\nCan't access top_ztrace...\n");
}
paniclog_append_noflush("\n");
}
}
#endif
#if !CONFIG_TELEMETRY
int
telemetry_gather(user_addr_t buffer __unused, uint32_t *length __unused, boolean_t mark __unused)
{
return KERN_NOT_SUPPORTED;
}
#endif
#include <machine/machine_cpu.h>
uint32_t kern_feature_overrides = 0;
boolean_t kern_feature_override(uint32_t fmask) {
if (kern_feature_overrides == 0) {
uint32_t fdisables = 0;
if (PE_parse_boot_argn("validation_disables", &fdisables, sizeof(fdisables))) {
fdisables |= KF_INITIALIZED;
kern_feature_overrides = fdisables;
} else {
kern_feature_overrides |= KF_INITIALIZED;
}
}
return ((kern_feature_overrides & fmask) == fmask);
}