Created
February 10, 2024 20:20
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extern(C) void main() | |
{ | |
rt_register_crash_handler(); | |
crash_me(); | |
} | |
void crash_me() | |
{ | |
int* a; | |
*a = 42; | |
} | |
import core.stdc.stdlib: free, exit; | |
import core.stdc.string: strlen, memcpy; | |
import core.stdc.stdio: fprintf, stderr, sprintf, fgets, fclose, FILE; | |
import core.sys.posix.unistd: readlink; | |
import core.sys.posix.signal: SIGUSR1; | |
import core.sys.posix.stdio: popen, pclose; | |
import core.sys.linux.execinfo: backtrace, backtrace_symbols; | |
import core.sys.linux.dlfcn: dladdr1, Dl_info, RTLD_DL_LINKMAP; | |
import core.sys.linux.link: link_map; | |
extern(C) export void rt_register_crash_handler() | |
{ | |
signal(SIGSEGV, &handler); | |
//signal(SIGUSR1, &handler); | |
} | |
extern (C): | |
private: | |
void handler(int sig) | |
{ | |
enum MAX_DEPTH = 32; | |
string signal_string; | |
switch (sig) | |
{ | |
case SIGSEGV: | |
signal_string = "SIGSEGV"; | |
break; | |
case SIGFPE: | |
signal_string = "SIGFPE"; | |
break; | |
case SIGILL: | |
signal_string = "SIGILL"; | |
break; | |
case SIGABRT: | |
signal_string = "SIGABRT"; | |
break; | |
default: | |
signal_string = "unknown"; | |
break; | |
} | |
fprintf(stderr, "-------------------------------------------------------------------+\r\n"); | |
fprintf(stderr, "Received signal '%s' (%d)\r\n", signal_string.ptr, sig); | |
fprintf(stderr, "-------------------------------------------------------------------+\r\n"); | |
void*[MAX_DEPTH] trace; | |
int stack_depth = backtrace(&trace[0], MAX_DEPTH); | |
char** strings = backtrace_symbols(&trace[0], stack_depth); | |
enum BUF_SIZE = 1024; | |
char[BUF_SIZE] syscom = 0; | |
char[BUF_SIZE] my_exe = 0; | |
char[BUF_SIZE] output = 0; | |
readlink("/proc/self/exe", &my_exe[0], BUF_SIZE); | |
fprintf(stderr, "executable: %s\n", &my_exe[0]); | |
fprintf(stderr, "backtrace: %i\n", stack_depth); | |
for (auto i = stack_depth-1; i >= 2; --i) | |
{ | |
auto line = strings[i]; | |
auto len = strlen(line); | |
bool insideParenthesis; | |
int startParenthesis; | |
int endParenthesis; | |
for (int j = 0; j < len; j++) | |
{ | |
// () | |
if (!insideParenthesis && line[j] == '(') | |
{ | |
insideParenthesis = true; | |
startParenthesis = j + 1; | |
} | |
else if (insideParenthesis && line[j] == ')') | |
{ | |
insideParenthesis = false; | |
endParenthesis = j; | |
} | |
} | |
size_t addr; | |
auto lmap = convert_to_vma(cast(size_t) trace[i], &addr); | |
FILE* fp; | |
sprintf(&syscom[0], "addr2line -e %s %p | ddemangle", | |
lmap.l_name[0] != 0 ? lmap.l_name : &my_exe[0], | |
cast(void*) addr); | |
fp = popen(&syscom[0], "r"); | |
fgets(&output[0], output.length, fp); | |
fclose(fp); | |
//fprintf(stderr, " syscom: %s %s::%s\n", &syscom[0], &my_exe[0], lmap.l_name); | |
auto getLen = strlen(output.ptr); | |
char[256] func = 0; | |
memcpy(func.ptr, &line[startParenthesis], (endParenthesis - startParenthesis)); | |
sprintf(&syscom[0], "echo '%s' | ddemangle", func.ptr); | |
fp = popen(&syscom[0], "r"); | |
output[getLen - 1] = ' '; // strip new line | |
fgets(&output[getLen], cast(int)(output.length - getLen), fp); | |
fclose(fp); | |
fprintf(stderr, " %s", output.ptr); | |
} | |
exit(-1); | |
} | |
// https://stackoverflow.com/questions/56046062/linux-addr2line-command-returns-0/63856113#63856113 | |
link_map* convert_to_vma(size_t addr, size_t* converted) | |
{ | |
//import rt.dbg; | |
Dl_info info; | |
link_map* link_map; | |
dladdr1(cast(void*) addr, &info, cast(void**)&link_map, RTLD_DL_LINKMAP); | |
//LINFO("{}", link_map.l_name); | |
*converted = addr - link_map.l_addr; | |
return link_map; | |
//return addr - link_map.l_addr; | |
//return addr - cast(size_t) info.dli_saddr; | |
} | |
// this should be volatile | |
/// | |
alias sig_atomic_t = int; | |
alias sigfn_t = void function(int); | |
/// | |
enum SIG_ERR = cast(sigfn_t) -1; | |
/// | |
enum SIG_DFL = cast(sigfn_t) 0; | |
/// | |
enum SIG_IGN = cast(sigfn_t) 1; | |
// standard C signals | |
/// | |
enum SIGABRT = 6; // Abnormal termination | |
/// | |
enum SIGFPE = 8; // Floating-point error | |
/// | |
enum SIGILL = 4; // Illegal hardware instruction | |
/// | |
enum SIGINT = 2; // Terminal interrupt character | |
/// | |
enum SIGSEGV = 11; // Invalid memory reference | |
/// | |
enum SIGTERM = 15; // Termination | |
/// | |
sigfn_t signal(int sig, sigfn_t func); | |
/// | |
int raise(int sig); |
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