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https://github.com/GrapheneOS/hardened_malloc.git
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android: implement fatal_error() via async_safe_fatal()
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()
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util.c
9
util.c
@ -10,6 +10,7 @@
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#include "util.h"
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#ifndef __ANDROID__
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static int write_full(int fd, const char *buf, size_t length) {
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do {
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ssize_t bytes_written = write(fd, buf, length);
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@ -25,14 +26,16 @@ static int write_full(int fd, const char *buf, size_t length) {
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return 0;
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}
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#endif
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COLD noreturn void fatal_error(const char *s) {
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#ifdef __ANDROID__
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async_safe_fatal("hardened_malloc: fatal allocator error: %s", s);
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#else
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const char *prefix = "fatal allocator error: ";
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(void)(write_full(STDERR_FILENO, prefix, strlen(prefix)) != -1 &&
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write_full(STDERR_FILENO, s, strlen(s)) != -1 &&
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write_full(STDERR_FILENO, "\n", 1));
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#ifdef __ANDROID__
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async_safe_format_log(ANDROID_LOG_FATAL, "hardened_malloc", "fatal allocator error: %s", s);
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#endif
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abort();
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#endif
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}
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