Don't copy strerror(3) or strsignal(3) strings if we can share.
Change-Id: Ic405269f63b945c6fb347e7c4346cd6f104aff35
diff --git a/libc/bionic/strerror.cpp b/libc/bionic/strerror.cpp
index 036ec8d..455dc52 100644
--- a/libc/bionic/strerror.cpp
+++ b/libc/bionic/strerror.cpp
@@ -29,9 +29,17 @@
#include <string.h>
#include "ThreadLocalBuffer.h"
+extern "C" const char* __strerror_lookup(int);
+
GLOBAL_INIT_THREAD_LOCAL_BUFFER(strerror);
char* strerror(int error_number) {
+ // Just return the original constant in the easy cases.
+ char* result = const_cast<char*>(__strerror_lookup(error_number));
+ if (result != NULL) {
+ return result;
+ }
+
LOCAL_INIT_THREAD_LOCAL_BUFFER(char*, strerror, NL_TEXTMAX);
strerror_r(error_number, strerror_buffer, strerror_buffer_size);
return strerror_buffer;