* @APPLE_LICENSE_HEADER_END@
*/
+#include <TargetConditionals.h>
#include <mach/vm_types.h>
#include <sys/uio.h>
-
-#include <dlfcn.h>
#include <errno.h>
#include <mach-o/dyld_priv.h>
#include <stdint.h>
#include <stdlib.h>
-#include <stdio.h>
-#include <string.h>
#include <uuid/uuid.h>
-
-#include "stack_logging.h"
#include "execinfo.h"
extern void _thread_stack_pcs(vm_address_t *buffer, unsigned max,
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_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 symbuf[_BACKTRACE_ADDRESS_LEN + 1];
+ char addrbuf[_BACKTRACE_ADDRESS_LEN + 1];
+ char imagebuf[_BACKTRACE_IMAGE_LEN + 1];
+ uuid_string_t uuidbuf;
const char* image = "???";
const char* symbol = "0x0";
uintptr_t symbol_offset = 0;
if (info->dli_fname) {
const char *tmp = strrchr(info->dli_fname, '/');
- if(tmp == NULL)
- image = info->dli_fname;
- else
- image = tmp + 1;
+ if (tmp == NULL) {
+ strlcpy(imagebuf, info->dli_fname, sizeof(imagebuf));
+ } else {
+ strlcpy(imagebuf, tmp + 1, sizeof(imagebuf));
+ }
+ image = imagebuf;
}
-
+
if (info->dli_sname) {
- symbol = info->dli_sname;
- symbol_offset = (uintptr_t)addr - (uintptr_t)info->dli_saddr;
- } else if(info->dli_fname) {
+ 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(symbuf, sizeof(symbuf), "0x%lx", (uintptr_t)info->dli_saddr)) {
- symbol = symbuf;
+ } 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);
+ 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;
+ }
}
char** backtrace_symbols(void* const* buffer, int size) {
char** ptrs;
intptr_t strs, end;
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;
- if (info[i].dli_sname) {
- total_bytes += strlen(info[i].dli_sname);
- } else if(info[i].dli_fname) {
- const char *tmp = strrchr(info[i].dli_fname, '/');
- if(tmp == NULL)
- total_bytes += strlen(info[i].dli_fname);
- else
- total_bytes += strlen(tmp + 1);
- } else {
- total_bytes += _BACKTRACE_ADDRESS_LEN;
- }
+ total_bytes += symbol_length(&info[i]);
}
-
+
result = (char**)malloc(total_bytes);
if (result == NULL) {
- free(info);
- return NULL;
+ goto error;
}
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) {
- free(info);
- return NULL;
+ if (chk < 0) {
+ goto error;
}
ptrs[i] = (char*)strs;
strs += chk + 1; // Step over the '\0'
}
-
+
free(info);
-
return result;
+
+error:
+ free(info);
+ free(result);
+ return NULL;
}
void backtrace_symbols_fd(void* const* buffer, int size, int fd) {
}
}
+#endif // !TARGET_OS_DRIVERKIT
+
void
backtrace_image_offsets(void* const* buffer, struct image_offset *imgoffs, int size)
{
projects / apple / libc.git / blobdiff