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--- Libc/Libc-1725.40.4/gen/backtrace.c
+++ Libc/Libc-498/gen/backtrace.c
@@ -1,5 +1,5 @@
/*
- * Copyright (c) 2007, 2008 Apple Inc. All rights reserved.
+ * Copyright (c) 2007 Apple Inc. All rights reserved.
*
* @APPLE_LICENSE_HEADER_START@
*
@@ -21,140 +21,57 @@
* @APPLE_LICENSE_HEADER_END@
*/
-#include <TargetConditionals.h>
#include <mach/vm_types.h>
#include <sys/uio.h>
-#include <errno.h>
-#include <mach-o/dyld_priv.h>
-#include <stdint.h>
+
+#include <dlfcn.h>
#include <stdlib.h>
-#include <uuid/uuid.h>
+#include <stdio.h>
+#include <string.h>
+
+#include "stack_logging.h"
#include "execinfo.h"
-#include "libc_private.h"
-
-extern void _thread_stack_pcs(vm_address_t *buffer, unsigned max,
- unsigned *nb, unsigned skip, void *startfp);
-
-static backtrace_get_pcs_func_t backtrace_get_pcs_func = _thread_stack_pcs;
-
-void backtrace_set_pcs_func(backtrace_get_pcs_func_t func) {
- backtrace_get_pcs_func = func ? func : _thread_stack_pcs;
-}
int backtrace(void** buffer, int size) {
+ extern void _thread_stack_pcs(vm_address_t *buffer, unsigned max, unsigned *nb, unsigned skip);
unsigned int num_frames;
- backtrace_get_pcs_func((vm_address_t*)buffer, size, &num_frames, 1, NULL);
+ _thread_stack_pcs((vm_address_t*)buffer, size, &num_frames, 1);
while (num_frames >= 1 && buffer[num_frames-1] == NULL) num_frames -= 1;
return num_frames;
}
-extern unsigned int _thread_stack_async_pcs(vm_address_t *buffer, unsigned max,
- unsigned *nb, unsigned skip, void *startfp);
-
-size_t backtrace_async(void** buffer, size_t size, uint32_t *task_id_ptr) {
- unsigned int num_frames;
- uint32_t task_id = _thread_stack_async_pcs((vm_address_t*)buffer, size, &num_frames, 1, NULL);
- while (num_frames >= 1 && buffer[num_frames-1] == NULL) num_frames -= 1;
- if (task_id_ptr) *task_id_ptr = task_id;
- return num_frames;
-}
+#if __LP64__
+#define _BACKTRACE_FORMAT "%-4d%-35s 0x%016x %s + %u"
+#define _BACKTRACE_FORMAT_SIZE 82
+#else
+#define _BACKTRACE_FORMAT "%-4d%-35s 0x%08x %s + %u"
+#define _BACKTRACE_FORMAT_SIZE 65
+#endif
-int
-backtrace_from_fp(void *startfp, void **buffer, int size)
-{
- unsigned int num_frames;
- _thread_stack_pcs((vm_address_t*)buffer, size, &num_frames, 1, startfp);
- while (num_frames >= 1 && buffer[num_frames-1] == NULL) num_frames -= 1;
- return num_frames;
-}
-
-#if !TARGET_OS_DRIVERKIT
-
-#include <dlfcn.h>
-#include <stdio.h>
-#include <string.h>
-#include "stack_logging.h"
-
-#if __LP64__
-#define _BACKTRACE_FORMAT "%-4d%-35s 0x%016lx %s + %lu"
-#define _BACKTRACE_FORMAT_SIZE 83 /* %lu can take up to 20, does not include %s, includes NUL */
-#define _BACKTRACE_ADDRESS_LEN 18 /* 0x + 16 (no NUL) */
-#else
-#define _BACKTRACE_FORMAT "%-4d%-35s 0x%08lx %s + %lu"
-#define _BACKTRACE_FORMAT_SIZE 65 /* %lu can take up to 10, does not include %s, includes NUL */
-#define _BACKTRACE_ADDRESS_LEN 10 /* 0x + 8 (no NUL) */
-#endif
-#define _BACKTRACE_IMAGE_LEN 35
-#define _BACKTRACE_UUID_LEN 36
-
static int _backtrace_snprintf(char* buf, size_t size, int frame, const void* addr, const Dl_info* info) {
- char addrbuf[_BACKTRACE_ADDRESS_LEN + 1];
- char imagebuf[_BACKTRACE_IMAGE_LEN + 1];
- uuid_string_t uuidbuf;
+ char symbuf[19];
const char* image = "???";
- const char* symbol = "0x0";
- uintptr_t symbol_offset = 0;
+ const char* symbol = symbuf;
if (info->dli_fname) {
- const char *tmp = strrchr(info->dli_fname, '/');
- if (tmp == NULL) {
- strlcpy(imagebuf, info->dli_fname, sizeof(imagebuf));
- } else {
- strlcpy(imagebuf, tmp + 1, sizeof(imagebuf));
- }
- image = imagebuf;
+ image = strrchr(info->dli_fname, '/') + 1;
+ if (image == NULL) image = info->dli_fname;
+ }
+
+ if (info->dli_sname) {
+ symbol = info->dli_sname;
+ } else {
+ snprintf(symbuf, sizeof(symbuf), "0x%x", info->dli_saddr);
}
- if (info->dli_sname) {
- uuid_t uuid;
- if (strcmp(info->dli_sname, "<redacted>") == 0 &&
- _dyld_get_image_uuid(info->dli_fbase, uuid)) {
- /*
- * dyld returns <redacted> when the symbol name has been elided in
- * the shared cache. To enable symbolication later, we provide the
- * UUID and UUID-offset instead.
- */
- uuid_unparse(uuid, uuidbuf);
- symbol = uuidbuf;
- symbol_offset = (uintptr_t)addr - (uintptr_t)info->dli_fbase;
- } else {
- symbol = info->dli_sname;
- symbol_offset = (uintptr_t)addr - (uintptr_t)info->dli_saddr;
- }
- } else if (info->dli_fname) {
- symbol = image;
- symbol_offset = (uintptr_t)addr - (uintptr_t)info->dli_fbase;
- } else if (0 < snprintf(addrbuf, sizeof(addrbuf), "0x%lx",
- (uintptr_t)info->dli_saddr)) {
- symbol = addrbuf;
- symbol_offset = (uintptr_t)addr - (uintptr_t)info->dli_saddr;
- } else {
- symbol_offset = (uintptr_t)addr;
- }
-
- return snprintf(buf, size, _BACKTRACE_FORMAT, frame, image,
- (uintptr_t)addr, symbol, symbol_offset);
-}
-
-static size_t symbol_length(Dl_info *info)
-{
- if (info->dli_sname) {
- if (strcmp(info->dli_sname, "<redacted>") == 0) {
- return _BACKTRACE_UUID_LEN;
- } else {
- return strlen(info->dli_sname);
- }
- } else if (info->dli_fname) {
- const char *tmp = strrchr(info->dli_fname, '/');
- if (tmp == NULL) {
- return strlen(info->dli_fname);
- } else {
- return strlen(tmp + 1);
- }
- } else {
- return _BACKTRACE_ADDRESS_LEN;
- }
+ return snprintf(buf, size,
+ _BACKTRACE_FORMAT,
+ frame,
+ image,
+ addr,
+ symbol,
+ addr - info->dli_saddr) + 1;
}
char** backtrace_symbols(void* const* buffer, int size) {
@@ -162,53 +79,44 @@
size_t total_bytes;
char** result;
char** ptrs;
- intptr_t strs, end;
+ intptr_t strs;
Dl_info* info = calloc(size, sizeof (Dl_info));
-
+
if (info == NULL) return NULL;
-
+
// Compute the total size for the block that is returned.
// The block will contain size number of pointers to the
// symbol descriptions.
total_bytes = sizeof(char*) * size;
-
+
// Plus each symbol description
for (i = 0 ; i < size; ++i) {
dladdr(buffer[i], &info[i]);
- total_bytes += _BACKTRACE_FORMAT_SIZE;
- total_bytes += symbol_length(&info[i]);
+ total_bytes += _BACKTRACE_FORMAT_SIZE + 1;
+ if (info[i].dli_sname) total_bytes += strlen(info[i].dli_sname);
}
-
+
result = (char**)malloc(total_bytes);
if (result == NULL) {
- goto error;
+ free(info);
+ return NULL;
}
- end = (intptr_t)result + total_bytes;
-
+
// Fill in the array of pointers and append the strings for
// each symbol description.
-
+
ptrs = result;
strs = ((intptr_t)result) + sizeof(char*) * size;
-
+
for (i = 0; i < size; ++i) {
- int chk = _backtrace_snprintf((char*)strs, end - (intptr_t)strs, i, buffer[i], &info[i]);
- if (chk < 0) {
- goto error;
- }
-
ptrs[i] = (char*)strs;
- strs += chk + 1; // Step over the '\0'
+ strs += _backtrace_snprintf((char*)strs, total_bytes, i, buffer[i], &info[i]);
}
-
+
free(info);
+
return result;
-
-error:
- free(info);
- free(result);
- return NULL;
}
void backtrace_symbols_fd(void* const* buffer, int size, int fd) {
@@ -227,21 +135,7 @@
dladdr(buffer[i], &info);
iov[0].iov_len = _backtrace_snprintf(buf, sizeof(buf), i, buffer[i], &info);
-
+
writev(fd, iov, 2);
}
}
-
-#endif // !TARGET_OS_DRIVERKIT
-
-void
-backtrace_image_offsets(void* const* buffer, struct image_offset *imgoffs, int size)
-{
- struct dyld_image_uuid_offset infos[size];
- _dyld_images_for_addresses(size, (const void **)buffer, infos);
-
- for (int i = 0; i < size; i++) {
- uuid_copy(imgoffs[i].uuid, infos[i].uuid);
- imgoffs[i].offset = infos[i].offsetInImage;
- };
-}