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add POSIX stacktrace crash handler and fix build script path

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This commit is contained in:
Krzosa Karol
2026-03-16 08:53:37 +01:00
parent ff31ca6d09
commit 7012a41365
2 changed files with 211 additions and 250 deletions
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2
build.sh
View File

@@ -4,6 +4,6 @@ if [ ! -d build ]; then
mkdir build
fi
cd build
clang ../src/testing/testing_main.c -o testing_main -I../src -g -Wall -Wextra -Werror -fdiagnostics-absolute-paths -Wno-single-bit-bitfield-constant-conversion -Wno-unsequenced -Wno-missing-field-initializers -Wno-missing-braces -ldl -lm -lbacktrace
clang $(realpath ../src/testing/testing_main.c) -o testing_main -I../src -g -Wall -Wextra -Werror -fdiagnostics-absolute-paths -Wno-single-bit-bitfield-constant-conversion -Wno-unsequenced -Wno-missing-field-initializers -Wno-missing-braces -ldl -lm -lbacktrace
./testing_main
cd ..

459
src/core/core_platform.c
View File

@@ -94,198 +94,6 @@ fn void os_core_init(void) {
#include <stdlib.h>
#include <signal.h>
typedef struct b_stacktrace_tag* b_stacktrace_handle;
/*
Returns a stack-trace handle from the point of view of the caller which
can be expanded to a string via b_stacktrace_to_string.
The handle is allocated with `malloc` and needs to be freed with `free`
*/
fn b_stacktrace_handle b_stacktrace_get();
/*
Converts a stack-trace handle to a human-readable string.
The string is allocated with `malloc` and needs to be freed with `free`
*/
fn char* b_stacktrace_to_string(b_stacktrace_handle stacktrace);
/*
Returns a human-readable stack-trace string from the point of view of the
caller.
The string is allocated with `malloc` and needs to be freed with `free`
*/
fn char* b_stacktrace_get_string(void);
/* version */
typedef struct print_buf {
char* buf;
int pos;
int size;
} print_buf;
static print_buf buf_init(void) {
print_buf ret = {
(char*) malloc(1024),
0,
1024
};
return ret;
}
static void buf_printf(print_buf* b, const char* fmt, ...) {
va_list args;
va_start(args, fmt);
const int len = stbsp_vsnprintf(NULL, 0, fmt, args) + 1;
va_end(args);
const int new_end = b->pos + len;
if (new_end > b->size) {
while (new_end > b->size) b->size *= 2;
b->buf = (char*)realloc(b->buf, b->size);
}
va_start(args, fmt);
b->pos += stbsp_vsnprintf(b->buf + b->pos, len, fmt, args);
va_end(args);
}
char* b_stacktrace_get_string(void) {
b_stacktrace_handle h = b_stacktrace_get();
char* ret = b_stacktrace_to_string(h);
free(h);
return ret;
}
#define B_STACKTRACE_MAX_DEPTH 1024
#define B_STACKTRACE_ERROR_FLAG ((DWORD64)1 << 63)
typedef struct b_stacktrace_entry {
DWORD64 AddrPC_Offset;
DWORD64 AddrReturn_Offset;
} b_stacktrace_entry;
static int SymInitialize_called = 0;
b_stacktrace_handle b_stacktrace_get(void) {
HANDLE process = GetCurrentProcess();
HANDLE thread = GetCurrentThread();
CONTEXT context;
STACKFRAME64 frame; /* in/out stackframe */
DWORD imageType;
b_stacktrace_entry* ret = (b_stacktrace_entry*)malloc(B_STACKTRACE_MAX_DEPTH * sizeof(b_stacktrace_entry));
int i = 0;
if (!SymInitialize_called) {
SymInitialize(process, NULL, TRUE);
SymInitialize_called = 1;
}
RtlCaptureContext(&context);
memset(&frame, 0, sizeof(frame));
#ifdef _M_IX86
imageType = IMAGE_FILE_MACHINE_I386;
frame.AddrPC.Offset = context.Eip;
frame.AddrPC.Mode = AddrModeFlat;
frame.AddrFrame.Offset = context.Ebp;
frame.AddrFrame.Mode = AddrModeFlat;
frame.AddrStack.Offset = context.Esp;
frame.AddrStack.Mode = AddrModeFlat;
#elif _M_X64
imageType = IMAGE_FILE_MACHINE_AMD64;
frame.AddrPC.Offset = context.Rip;
frame.AddrPC.Mode = AddrModeFlat;
frame.AddrFrame.Offset = context.Rsp;
frame.AddrFrame.Mode = AddrModeFlat;
frame.AddrStack.Offset = context.Rsp;
frame.AddrStack.Mode = AddrModeFlat;
#elif _M_IA64
imageType = IMAGE_FILE_MACHINE_IA64;
frame.AddrPC.Offset = context.StIIP;
frame.AddrPC.Mode = AddrModeFlat;
frame.AddrFrame.Offset = context.IntSp;
frame.AddrFrame.Mode = AddrModeFlat;
frame.AddrBStore.Offset = context.RsBSP;
frame.AddrBStore.Mode = AddrModeFlat;
frame.AddrStack.Offset = context.IntSp;
frame.AddrStack.Mode = AddrModeFlat;
#else
#error "Platform not supported!"
#endif
while (1) {
b_stacktrace_entry* cur = ret + i++;
if (i == B_STACKTRACE_MAX_DEPTH) {
cur->AddrPC_Offset = 0;
cur->AddrReturn_Offset = 0;
break;
}
if (!StackWalk64(imageType, process, thread, &frame, &context, NULL, SymFunctionTableAccess64, SymGetModuleBase64, NULL)) {
cur->AddrPC_Offset = frame.AddrPC.Offset;
cur->AddrReturn_Offset = B_STACKTRACE_ERROR_FLAG; /* mark error */
cur->AddrReturn_Offset |= GetLastError();
break;
}
cur->AddrPC_Offset = frame.AddrPC.Offset;
cur->AddrReturn_Offset = frame.AddrReturn.Offset;
if (frame.AddrReturn.Offset == 0) {
break;
}
}
return (b_stacktrace_handle)(ret);
}
char* b_stacktrace_to_string(b_stacktrace_handle h) {
const b_stacktrace_entry* entries = (b_stacktrace_entry*)h;
int i = 0;
HANDLE process = GetCurrentProcess();
print_buf out = buf_init();
IMAGEHLP_SYMBOL64* symbol = (IMAGEHLP_SYMBOL64*)malloc(sizeof(IMAGEHLP_SYMBOL64) + 1024);
symbol->SizeOfStruct = sizeof(IMAGEHLP_SYMBOL64);
symbol->MaxNameLength = 1024;
while (1) {
IMAGEHLP_LINE64 lineData;
DWORD lineOffset = 0;
DWORD64 symOffset = 0;
const b_stacktrace_entry* cur = entries + i++;
if (cur->AddrReturn_Offset & B_STACKTRACE_ERROR_FLAG) {
DWORD error = cur->AddrReturn_Offset & 0xFFFFFFFF;
buf_printf(&out, "StackWalk64 error: %d @ %p\n", error, cur->AddrPC_Offset);
break;
}
if (cur->AddrPC_Offset == cur->AddrReturn_Offset) {
buf_printf(&out, "Stack overflow @ %p\n", cur->AddrPC_Offset);
break;
}
SymGetLineFromAddr64(process, cur->AddrPC_Offset, &lineOffset, &lineData);
buf_printf(&out, "%s(%d): ", lineData.FileName, lineData.LineNumber);
if (SymGetSymFromAddr64(process, cur->AddrPC_Offset, &symOffset, symbol)) {
buf_printf(&out, "%s\n", symbol->Name);
}
else {
buf_printf(&out, " Unkown symbol @ %p\n", cur->AddrPC_Offset);
}
if (cur->AddrReturn_Offset == 0) {
break;
}
}
free(symbol);
return out.buf;
}
fn void *os_vmem_reserve(usize size) {
void *result = VirtualAlloc(0, size, MEM_RESERVE, PAGE_READWRITE);
return result;
@@ -349,6 +157,9 @@ fn void os_core_init(void) {
tcx->perm = perm;
}
#elif PLATFORM_POSIX
#if defined(__linux__) && !defined(_GNU_SOURCE)
#define _GNU_SOURCE
#endif
#include <math.h>
#include <string.h>
#include <stdio.h>
@@ -357,13 +168,215 @@ fn void os_core_init(void) {
#include <sys/mman.h>
#include <signal.h>
#include <ucontext.h>
#include <execinfo.h>
#include <unistd.h>
#include <dlfcn.h>
#if !PLATFORM_EMSCRIPTEN
#include <execinfo.h>
#include <backtrace.h>
typedef struct b_stacktrace_tag* b_stacktrace_handle;
b_stacktrace_handle b_stacktrace_get();
int b_stacktrace_depth(b_stacktrace_handle stacktrace);
char* b_stacktrace_to_string(b_stacktrace_handle stacktrace);
char* malloc_backtrace(void);
typedef struct print_buf {
char* buf;
int pos;
int size;
} print_buf;
static print_buf buf_init(void) {
print_buf ret = {
(char*) malloc(1024),
0,
1024
};
return ret;
}
static void buf_printf(print_buf* b, const char* fmt, ...) {
va_list args;
va_start(args, fmt);
const int len = vsnprintf(NULL, 0, fmt, args) + 1;
va_end(args);
const int new_end = b->pos + len;
if (new_end > b->size) {
while (new_end > b->size) b->size *= 2;
b->buf = (char*)realloc(b->buf, b->size);
}
va_start(args, fmt);
b->pos += vsnprintf(b->buf + b->pos, len, fmt, args);
va_end(args);
}
char* malloc_backtrace(void) {
b_stacktrace_handle h = b_stacktrace_get();
char* ret = b_stacktrace_to_string(h);
free(h);
return ret;
}
#define B_STACKTRACE_MAX_DEPTH 1024
typedef struct b_stacktrace {
void* trace[B_STACKTRACE_MAX_DEPTH];
int trace_size;
} b_stacktrace;
b_stacktrace_handle b_stacktrace_get(void) {
b_stacktrace* ret = (b_stacktrace*)malloc(sizeof(b_stacktrace));
ret->trace_size = backtrace(ret->trace, B_STACKTRACE_MAX_DEPTH);
return (b_stacktrace_handle)(ret);
}
int b_stacktrace_depth(b_stacktrace_handle h) {
const b_stacktrace* stacktrace = (b_stacktrace*)h;
return stacktrace->trace_size;
}
char* b_stacktrace_to_string(b_stacktrace_handle h) {
const b_stacktrace* stacktrace = (b_stacktrace*)h;
char** messages = backtrace_symbols(stacktrace->trace, stacktrace->trace_size);
print_buf out = buf_init();
int i;
int skip_count = 5;
for (i = 0; i < stacktrace->trace_size; ++i) {
void* tracei = stacktrace->trace[i];
char* msg = messages[i];
if (i < skip_count) {
continue;
}
/* calculate load offset */
Dl_info info;
dladdr(tracei, &info);
if (info.dli_fbase == (void*)0x400000) {
/* address from executable, so don't offset */
info.dli_fbase = NULL;
}
while (*msg && *msg != '(') ++msg;
*msg = 0;
{
char cmd[1024];
char line[2048];
FILE* fp;
snprintf(cmd, 1024, "addr2line -e %s -f -C -p %p 2>/dev/null", messages[i], (void*)((char*)tracei - (char*)info.dli_fbase));
fp = popen(cmd, "r");
if (!fp) {
buf_printf(&out, "Failed to generate trace further...\n");
break;
}
while (fgets(line, sizeof(line), fp)) {
buf_printf(&out, " ");
if (strstr(line, "?? ")) {
/* just output address if nothing can be found */
buf_printf(&out, "%p\n", tracei);
}
else {
int len = strlen(line);
char *at = strstr(line, " at ");
if (at) {
char *function = line;
int function_len = at - line;
char *file = at + 4;
int file_len = strlen(file) - 1;
buf_printf(&out, " %.*s %.*s (%s)\n", file_len, file, function_len, function, messages[i]);
} else {
buf_printf(&out, " %.*s (%s)\n", len - 1, line, messages[i]);
}
}
}
pclose(fp);
}
}
free(messages);
return out.buf;
}
void print_backtrace(void) {
char *backtrace = malloc_backtrace();
puts(backtrace);
free(backtrace);
}
const char *signal_to_string(int signal) {
switch (signal) {
case SIGINT: return "SIGINT";
case SIGILL: return "SIGILL";
case SIGABRT: return "SIGABRT";
case SIGFPE: return "SIGFPE";
case SIGSEGV: return "SIGSEGV";
case SIGTERM: return "SIGTERM";
case SIGHUP: return "SIGALRM";
case SIGQUIT: return "SIGQUIT";
case SIGTRAP: return "SIGTRAP";
case SIGKILL: return "SIGKILL";
case SIGPIPE: return "SIGPIPE";
case SIGALRM: return "SIGHUP";
case SIGPOLL: return "SIGPOLL";
default: return "";
}
}
void backtrace_handle_signal(int signal, siginfo_t* info, void* context) {
(void)context; // unused
printf("Stack trace (%s/%d):", signal_to_string(signal), signal);
if (signal == SIGSEGV) {
printf(" at addr: %p", info->si_addr);
}
puts("");
print_backtrace();
exit(1);
}
void os__setup_backtrace() {
struct sigaction sa;
sa.sa_sigaction = backtrace_handle_signal;
sigemptyset(&sa.sa_mask);
sa.sa_flags = SA_RESTART | SA_SIGINFO;
sigaction(SIGSEGV, &sa, NULL);
sigaction(SIGABRT, &sa, NULL);
sigaction(SIGFPE, &sa, NULL);
sigaction(SIGBUS, &sa, NULL);
sigaction(SIGILL, &sa, NULL);
sigaction(SIGTRAP, &sa, NULL);
#ifdef SIGSYS
sigaction(SIGSYS, &sa, NULL);
#endif
#ifdef SIGXCPU
sigaction(SIGXCPU, &sa, NULL);
#endif
#ifdef SIGXFSZ
sigaction(SIGXFSZ, &sa, NULL);
#endif
#ifdef SIGPIPE
sigaction(SIGPIPE, &sa, NULL);
#endif
#ifdef SIGTERM
sigaction(SIGTERM, &sa, NULL);
#endif
#ifdef SIGINT
sigaction(SIGINT, &sa, NULL);
#endif
#ifdef SIGQUIT
sigaction(SIGQUIT, &sa, NULL);
#endif
}
#endif
fn void *os_vmem_reserve(usize size) {
void *result = mmap(0, size, PROT_NONE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
return result == MAP_FAILED ? NULL : result;
@@ -399,68 +412,16 @@ fn f64 os_parse_float(char *str) {
return strtod(str, NULL);
}
gb struct backtrace_state *backtrace_state = NULL;
fn void os_core_backtrace_error_callback(void *data, const char *msg, int errnum) {
unused(data);
errorf("libbacktrace error: %s (errnum: %d)\n", msg, errnum);
}
fn int os_core_backtrace_print_callback(void *data, uintptr_t pc, const char *filename, int lineno, const char *function) {
unused(data);
unused(pc);
b32 printed = false;
if (filename != NULL) {
char buffer[512];
char *f = realpath(filename, buffer);
printf("%s:%d:1: ", f, lineno);
printed = true;
}
if (function != NULL) {
printf("%s", function);
printed = true;
}
if (printed) {
printf("\n");
}
return 0;
}
#if !PLATFORM_EMSCRIPTEN
fn void os_unix_crash_handler(int signal, siginfo_t* info, void* context) {
unused(context);
unused(signal);
unused(info);
backtrace_full(backtrace_state, 2, os_core_backtrace_print_callback, os_core_backtrace_error_callback, NULL);
exit(1);
}
fn void os_unix_register_crash_handler() {
backtrace_state = backtrace_create_state(NULL, 1, os_core_backtrace_error_callback, NULL);
struct sigaction sa;
sa.sa_sigaction = os_unix_crash_handler;
sigemptyset(&sa.sa_mask);
sa.sa_flags = SA_RESTART | SA_SIGINFO;
sigaction(SIGSEGV, &sa, NULL);
sigaction(SIGABRT, &sa, NULL);
sigaction(SIGBUS, &sa, NULL);
sigaction(SIGILL, &sa, NULL);
sigaction(SIGFPE, &sa, NULL);
}
#endif
fn void os_core_small_init(ma_arena_t *arena) {
#if !PLATFORM_EMSCRIPTEN
os__setup_backtrace();
#endif
tcx = ma_push_type(arena, thread_ctx_t);
tcx->log.break_on_error = true;
tcx->log.break_on_fatal = true;
tcx->log.break_on_warning = true;
tcx->log.print_file_and_line = true;
tcx->log.log_proc = default_log_proc;
#if !PLATFORM_EMSCRIPTEN
os_unix_register_crash_handler();
#endif
}
fn void os_core_init(void) {