Add basic Darwin support to libcorkscrew.
This might not seem like much, but it's already better than Mac OS'
backtrace(3).
(cherry picked from commit 2a46f6293f19b9d6100187fbd53088088e671b88)
Change-Id: I197b06c4c19f728ad6f194b2f473bd9dcd99b8a6
diff --git a/libcorkscrew/ptrace.c b/libcorkscrew/ptrace.c
index 776ef69..be58f7f 100644
--- a/libcorkscrew/ptrace.c
+++ b/libcorkscrew/ptrace.c
@@ -46,21 +46,25 @@
}
bool try_get_word(const memory_t* memory, uintptr_t ptr, uint32_t* out_value) {
- ALOGV("try_get_word: reading word at 0x%08x", ptr);
+ ALOGV("try_get_word: reading word at %p", (void*) ptr);
if (ptr & 3) {
- ALOGV("try_get_word: invalid pointer 0x%08x", ptr);
+ ALOGV("try_get_word: invalid pointer %p", (void*) ptr);
*out_value = 0xffffffffL;
return false;
}
if (memory->tid < 0) {
if (!is_readable_map(memory->map_info_list, ptr)) {
- ALOGV("try_get_word: pointer 0x%08x not in a readable map", ptr);
+ ALOGV("try_get_word: pointer %p not in a readable map", (void*) ptr);
*out_value = 0xffffffffL;
return false;
}
*out_value = *(uint32_t*)ptr;
return true;
} else {
+#if defined(__APPLE__)
+ ALOGV("no ptrace on Mac OS");
+ return false;
+#else
// ptrace() returns -1 and sets errno when the operation fails.
// To disambiguate -1 from a valid result, we clear errno beforehand.
errno = 0;
@@ -71,6 +75,7 @@
return false;
}
return true;
+#endif
}
}