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android: implement fatal_error() via async_safe_fatal()

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async_safe_fatal() performs the following steps:
- logs the error message to stderr and logcat
- passes error message to debuggerd via android_set_abort_message(). debuggerd then saves the error
message in the crash report file ("tombstone")
- calls abort()
This commit is contained in:
Dmitry Muhomor 2023-09-19 18:18:01 +03:00
parent 2d302f7d85
commit 52bc3bc7e7
1 changed files with 6 additions and 3 deletions
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9
util.c
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@ -10,6 +10,7 @@
#include "util.h" #include "util.h"
#ifndef __ANDROID__
static int write_full(int fd, const char *buf, size_t length) { static int write_full(int fd, const char *buf, size_t length) {
do { do {
ssize_t bytes_written = write(fd, buf, length); ssize_t bytes_written = write(fd, buf, length);
@ -25,14 +26,16 @@ static int write_full(int fd, const char *buf, size_t length) {
return 0; return 0;
} }
#endif
COLD noreturn void fatal_error(const char *s) { COLD noreturn void fatal_error(const char *s) {
#ifdef __ANDROID__
async_safe_fatal("hardened_malloc: fatal allocator error: %s", s);
#else
const char *prefix = "fatal allocator error: "; const char *prefix = "fatal allocator error: ";
(void)(write_full(STDERR_FILENO, prefix, strlen(prefix)) != -1 && (void)(write_full(STDERR_FILENO, prefix, strlen(prefix)) != -1 &&
write_full(STDERR_FILENO, s, strlen(s)) != -1 && write_full(STDERR_FILENO, s, strlen(s)) != -1 &&
write_full(STDERR_FILENO, "\n", 1)); write_full(STDERR_FILENO, "\n", 1));
#ifdef __ANDROID__
async_safe_format_log(ANDROID_LOG_FATAL, "hardened_malloc", "fatal allocator error: %s", s);
#endif
abort(); abort();
#endif
} }