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Your Name 2025-06-04 08:02:35 +12:00
parent a3ba48adec
commit 48d139997b
1 changed files with 96 additions and 62 deletions
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142
ipdemo/src/assert.hpp
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@ -14,6 +14,17 @@
#include <cstring>
#include <unistd.h>
// ANSI color codes
namespace colors {
constexpr const char* reset = "\033[0m";
constexpr const char* red = "\033[31m";
constexpr const char* green = "\033[32m";
constexpr const char* yellow = "\033[33m";
constexpr const char* blue = "\033[34m";
constexpr const char* magenta = "\033[35m";
constexpr const char* cyan = "\033[36m";
}
// Simple RAII wrapper for file descriptor
class FileDescriptor {
int fd_ = -1;
@ -25,36 +36,66 @@ public:
FileDescriptor& operator=(const FileDescriptor&) = delete;
};
std::string get_addr2line_info(const char* executable, void* addr) {
struct SourceInfo {
std::string function;
std::string file;
int line = 0;
};
SourceInfo get_source_info(const char* executable, void* addr) {
char cmd[512];
snprintf(cmd, sizeof(cmd), "addr2line -f -p -e %s %p 2>/dev/null", executable, addr);
snprintf(cmd, sizeof(cmd), "addr2line -f -e %s %p 2>/dev/null", executable, addr);
FILE* pipe = popen(cmd, "r");
if (!pipe) return "";
if (!pipe) return {};
char buffer[1024];
std::string result;
while (fgets(buffer, sizeof(buffer), pipe) != nullptr) {
result += buffer;
SourceInfo info;
char func_buf[1024] = {0};
char file_buf[1024] = {0};
int line = 0;
// Read function name
if (fgets(func_buf, sizeof(func_buf), pipe)) {
// Remove trailing newline
size_t len = strlen(func_buf);
if (len > 0 && func_buf[len-1] == '\n') {
func_buf[len-1] = '\0';
}
info.function = func_buf;
// Demangle the function name
int status = 0;
char* demangled = abi::__cxa_demangle(func_buf, nullptr, nullptr, &status);
if (demangled) {
info.function = demangled;
free(demangled);
}
}
// Read file and line number
if (fgets(file_buf, sizeof(file_buf), pipe)) {
char* colon = strchr(file_buf, ':');
if (colon) {
*colon = '\0';
info.line = atoi(colon + 1);
// Extract just the filename
const char* slash = strrchr(file_buf, '/');
info.file = (slash ? slash + 1 : file_buf);
}
}
pclose(pipe);
// Remove trailing newline if present
if (!result.empty() && result.back() == '\n') {
result.pop_back();
}
return result;
return info;
}
void print_stacktrace() {
unw_cursor_t cursor;
unw_context_t context;
unw_word_t offset, pc;
char sym[256];
char *name = sym;
int status;
int frame_num = 0;
unw_word_t pc;
char exe_path[1024] = {0};
bool found_main = false;
std::vector<SourceInfo> frames;
// Get the path to the current executable
ssize_t count = readlink("/proc/self/exe", exe_path, sizeof(exe_path) - 1);
@ -68,56 +109,49 @@ void print_stacktrace() {
unw_getcontext(&context);
unw_init_local(&cursor, &context);
std::cerr << "Stack trace (most recent call first):\n";
// Walk up the stack
// First pass: collect frames until we find main
while (unw_step(&cursor) > 0) {
unw_get_reg(&cursor, UNW_REG_IP, &pc);
if (pc == 0) {
if (unw_get_reg(&cursor, UNW_REG_IP, &pc) != 0 || pc == 0) {
break;
}
std::cerr << "#" << frame_num++ << " ";
SourceInfo info = get_source_info(exe_path, reinterpret_cast<void*>(pc));
// Get symbol name
if (unw_get_proc_name(&cursor, sym, sizeof(sym), &offset) == 0) {
// Demangle the C++ name
int status = 0;
size_t length = sizeof(sym);
name = abi::__cxa_demangle(sym, nullptr, &length, &status);
// Get line info using addr2line
std::string line_info = get_addr2line_info(exe_path, (void*)pc);
Dl_info info;
if (dladdr(reinterpret_cast<void*>(pc), &info) && info.dli_fname) {
const char* base = strrchr(info.dli_fname, '/');
std::cerr << (base ? base + 1 : info.dli_fname) << ": ";
// Stop collecting after main()
if (!info.function.empty() &&
(info.function.find("main") != std::string::npos ||
info.function.find("__libc_start_main") != std::string::npos)) {
found_main = true;
frames.push_back(info);
break;
}
if (name) {
std::cerr << name;
free(name);
frames.push_back(info);
}
// Print the collected frames in reverse order (most recent last)
std::cerr << colors::yellow << "Stack trace (most recent call last):" << colors::reset << "\n";
for (size_t i = frames.size(); i-- > 0; ) {
const auto& frame = frames[i];
std::cerr << " "; // Indent each line
if (frame.function.empty()) {
std::cerr << colors::red << "[unknown function]" << colors::reset;
} else {
std::cerr << sym;
std::cerr << colors::green << frame.function << colors::reset;
}
std::cerr << " + 0x" << std::hex << offset;
if (!line_info.empty()) {
std::cerr << " at " << line_info;
if (!frame.file.empty() && frame.line > 0) {
std::cerr << " at " << colors::blue << frame.file << colors::reset
<< ":" << colors::magenta << frame.line << colors::reset;
}
std::cerr << " [0x" << std::hex << pc << "]\n";
} else {
std::cerr << "[unknown] [0x" << std::hex << pc << "]";
// Try to get at least some info with addr2line even for unknown symbols
std::string line_info = get_addr2line_info(exe_path, (void*)pc);
if (!line_info.empty()) {
std::cerr << " at " << line_info;
}
std::cerr << "\n";
}
if (!found_main) {
std::cerr << " " << colors::yellow << "[truncated - main() not found]" << colors::reset << "\n";
}
}