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AK: Enable backtrace() on Android API level 33 and higher

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``<execinfo.h>`` was added to bionic in Android 13 (API 33)
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Andrew Kaster 2023-09-14 13:38:06 -06:00 committed by Andrew Kaster
parent 3c39579510
commit 10d7ec2027
Notes: sideshowbarker 2024-07-17 04:10:16 +09:00 
Author: https://github.com/ADKaster
Commit: https://github.com/SerenityOS/serenity/commit/10d7ec2027
Pull-request: https://github.com/SerenityOS/serenity/pull/21065
Reviewed-by: https://github.com/bugaevc
1 changed files with 30 additions and 6 deletions
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36
AK/Assertions.cpp
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@ -7,17 +7,32 @@
#include <AK/Assertions.h>
#include <AK/Format.h>
#include <AK/Platform.h>
#include <AK/StringBuilder.h>
#include <AK/StringView.h>
#if (defined(AK_OS_LINUX) && !defined(AK_OS_ANDROID)) || defined(AK_LIBC_GLIBC) || defined(AK_OS_BSD_GENERIC) || defined(AK_OS_SOLARIS)
# define EXECINFO_BACKTRACE
#endif
#if defined(AK_OS_ANDROID) && (__ANDROID_API__ >= 33)
# include <android/log.h>
# define EXECINFO_BACKTRACE
# define PRINT_ERROR(s) __android_log_write(ANDROID_LOG_WARN, "AK", (s))
#else
# define PRINT_ERROR(s) (void)fputs((s), stderr)
#endif
#if defined(EXECINFO_BACKTRACE)
# include <cxxabi.h>
# include <execinfo.h>
#endif
#if defined(AK_OS_SERENITY)
# define ERRORLN dbgln
#else
# define ERRORLN warnln
#endif
#if !defined(KERNEL)
# if defined(EXECINFO_BACKTRACE)
@ -32,11 +47,13 @@ ALWAYS_INLINE void dump_backtrace()
for (auto i = 0; i < num_frames; ++i) {
// If there is a C++ symbol name in the line of the backtrace, demangle it
StringView sym(syms[i], strlen(syms[i]));
StringBuilder error_builder;
if (auto idx = sym.find("_Z"sv); idx.has_value()) {
// Play C games with the original string so we can print before and after the mangled symbol with a C API
// We don't want to call dbgln() here on substring StringView because we might VERIFY() within AK::Format
syms[i][idx.value() - 1] = '\0';
(void)fprintf(stderr, "%s ", syms[i]);
error_builder.append(syms[i], strlen(syms[i]));
error_builder.append(' ');
auto sym_substring = sym.substring_view(idx.value());
auto end_of_sym = sym_substring.find_any_of("+ "sv).value_or(sym_substring.length() - 1);
@ -47,14 +64,21 @@ ALWAYS_INLINE void dump_backtrace()
auto* raw_str = &syms[i][idx.value()];
buf = abi::__cxa_demangle(raw_str, buf, &buf_size, nullptr);
(void)fputs(buf ? buf : raw_str, stderr);
auto* buf_to_print = buf ? buf : raw_str;
error_builder.append(buf_to_print, strlen(buf_to_print));
free(buf);
(void)fprintf(stderr, " %s", &syms[i][idx.value() + end_of_sym + 1]);
error_builder.append(' ');
auto* end_of_line = &syms[i][idx.value() + end_of_sym + 1];
error_builder.append(end_of_line, strlen(end_of_line));
} else {
(void)fputs(sym.characters_without_null_termination(), stderr);
error_builder.append(sym);
}
(void)fputs("\n", stderr);
# if !defined(AK_OS_ANDROID)
error_builder.append('\n');
# endif
error_builder.append('\0');
PRINT_ERROR(error_builder.string_view().characters_without_null_termination());
}
free(syms);
}
@ -65,7 +89,7 @@ extern "C" {
void ak_verification_failed(char const* message)
{
dbgln("VERIFICATION FAILED: {}", message);
ERRORLN("VERIFICATION FAILED: {}", message);
# if defined(EXECINFO_BACKTRACE)
dump_backtrace();
# endif