static void handler(int sig) {
unw_context_t context;
unw_getcontext(&context);
unw_cursor_t cursor;
unw_init_local(&cursor, &context);
SkDebugf("\nSignal %d:\n", sig);
while (unw_step(&cursor) > 0) {
static const size_t kMax = 256;
char mangled[kMax], demangled[kMax];
unw_word_t offset;
unw_get_proc_name(&cursor, mangled, kMax, &offset);
int ok;
size_t len = kMax;
abi::__cxa_demangle(mangled, demangled, &len, &ok);
SkDebugf("%s (+0x%zx)\n", ok == 0 ? demangled : mangled, (size_t)offset);
}
SkDebugf("\n");
// Exit NOW. Don't notify other threads, don't call anything registered with atexit().
_Exit(sig);
}
/*
* ut_dump_backtrace -- dump stacktrace to error log using libunwind
*/
void
ut_dump_backtrace(void)
{
unw_context_t context;
unw_proc_info_t pip;
pip.unwind_info = NULL;
int ret = unw_getcontext(&context);
if (ret) {
ERR("unw_getcontext: %s [%d]", unw_strerror(ret), ret);
return;
}
unw_cursor_t cursor;
ret = unw_init_local(&cursor, &context);
if (ret) {
ERR("unw_init_local: %s [%d]", unw_strerror(ret), ret);
return;
}
ret = unw_step(&cursor);
char procname[PROCNAMELEN];
unsigned i = 0;
while (ret > 0) {
ret = unw_get_proc_info(&cursor, &pip);
if (ret) {
ERR("unw_get_proc_info: %s [%d]", unw_strerror(ret),
ret);
break;
}
unw_word_t off;
ret = unw_get_proc_name(&cursor, procname, PROCNAMELEN, &off);
if (ret && ret != -UNW_ENOMEM) {
if (ret != -UNW_EUNSPEC) {
ERR("unw_get_proc_name: %s [%d]",
unw_strerror(ret), ret);
}
strcpy(procname, "?");
}
void *ptr = (void *)(pip.start_ip + off);
Dl_info dlinfo;
const char *fname = "?";
if (dladdr(ptr, &dlinfo) && dlinfo.dli_fname &&
*dlinfo.dli_fname)
fname = dlinfo.dli_fname;
ERR("%u: %s (%s%s+0x%lx) [%p]", i++, fname, procname,
ret == -UNW_ENOMEM ? "..." : "", off, ptr);
ret = unw_step(&cursor);
if (ret < 0)
ERR("unw_step: %s [%d]", unw_strerror(ret), ret);
}
}
static void findRealErrorOnStack (ShockerScriptableControlObject* obj) {
unw_context_t uc;
unw_cursor_t cursor, prev;
unw_word_t bp;
unw_getcontext(&uc);
unw_init_local(&cursor, &uc);
char framename [1024];
int count = 0;
while (unw_step(&cursor) > 0 && count < 18) {
count++;
unw_get_proc_name (&cursor, framename, sizeof(framename), 0);
if (!*framename)
continue;
if (strstr (framename, "js_ReportErrorAgain")) {
#if (__i386__)
unw_get_reg(&prev, UNW_X86_EBP, &bp);
#elif (__amd64__)
unw_get_reg(&prev, UNW_X86_64_RBP, &bp);
#endif
bp += 12;
char ** n = (char**)bp;
obj->GetLogProvider ()->LogError (*n);
break;
}
prev = cursor;
}
}
void VSDebugLib::printStack() {
unw_cursor_t cursor;
unw_context_t uc;
unw_word_t ip, sp, off;
unw_proc_info_t pi;
char file[256], name[256];
int line;
int status;
unw_getcontext(&uc);
unw_init_local(&cursor, &uc);
while (unw_step(&cursor) > 0) {
unw_get_reg(&cursor, UNW_REG_IP, &ip);
unw_get_reg(&cursor, UNW_REG_SP, &sp);
unw_get_proc_name (&cursor, name, sizeof (name), &off);
getFileAndLine((long)ip, file, 256, &line);
if (line >= 0) {
char *realname;
realname = abi::__cxa_demangle(name, 0, 0, &status);
if (realname) {
printf("%s: %s, %d\n", realname, file, line);
free(realname);
} else {
printf("%s: %s, %d\n", name, file, line);
}
}
}
}
void backtrace() {
unw_cursor_t cursor;
unw_context_t context;
// Initialize cursor to current frame for local unwinding.
unw_getcontext(&context);
unw_init_local(&cursor, &context);
// Unwind frames one by one, going up the frame stack.
while (unw_step(&cursor) > 0) {
unw_word_t offset, pc;
unw_get_reg(&cursor, UNW_REG_IP, &pc);
if (pc == 0) {
break;
}
printf("0x%lx:", pc);
char sym[256];
if (unw_get_proc_name(&cursor, sym, sizeof(sym), &offset) == 0) {
char* nameptr = sym;
int status;
char* demangled = abi::__cxa_demangle(sym, nullptr, nullptr, &status);
if (status == 0) {
nameptr = demangled;
}
char file[256];
int line = 0;
getFileAndLine((long)pc, file, 256, &line);
printf(" (%s+0x%lx) in %s:%d\n", nameptr, offset, file, line);
free(demangled);
} else {
printf(" -- error: unable to obtain symbol name for this frame\n");
}
}
}
void dumpStack(FILE* file, unw_cursor_t cursor)
{
int nframe = 0;
char buffer[100];
unw_word_t off;
do {
const char * name = !unw_get_proc_name(&cursor, buffer, 100, &off) ? buffer : "?";
int status;
// Unmangle C++ names:
char* realname = abi::__cxa_demangle(name, 0, 0, &status);
#if defined(__x86_64__)
unw_word_t rip = 0;
unw_word_t rsp = 0;
unw_get_reg(&cursor, UNW_X86_64_RIP, &rip);
unw_get_reg(&cursor, UNW_X86_64_RSP, &rsp);
fprintf(file, " %i: %s (RIP=0x%" PRIx64 " RSP=0x%" PRIx64 ")\n",
nframe, realname ? realname : name, (std::uint64_t) rip, (std::uint64_t) rsp);
#else
fprintf(file, " %i: %s\n", nframe, realname ? realname : name);
#endif
free(realname);
++nframe;
} while(unw_step(&cursor));
}
/* TODO with some refactoring we might be able to re-use debug_symbol_name_cached()
* instead.. otoh if using libunwind I think u_debug_symbol could just be excluded
* from build?
*/
static const char *
symbol_name_cached(unw_cursor_t *cursor, unw_proc_info_t *pip)
{
void *addr = (void *)(uintptr_t)pip->start_ip;
char *name;
mtx_lock(&symbols_mutex);
if(!symbols_hash)
symbols_hash = util_hash_table_create(hash_ptr, compare_ptr);
name = util_hash_table_get(symbols_hash, addr);
if(!name)
{
char procname[256];
unw_word_t off;
int ret;
ret = unw_get_proc_name(cursor, procname, sizeof(procname), &off);
if (ret && ret != -UNW_ENOMEM) {
procname[0] = '?';
procname[1] = 0;
}
if (asprintf(&name, "%s%s", procname, ret == -UNW_ENOMEM ? "..." : "") == -1)
name = "??";
util_hash_table_set(symbols_hash, addr, (void*)name);
}
mtx_unlock(&symbols_mutex);
return name;
}
void _dump_crash_report(unsigne pid)
// shortened code from android's debuggerd
// to get a backtrace on ARM
{
unw_addr_space_t as;
struct UPT_info *ui;
unw_cursor_t cursor;
as = unw_create_addr_space(&_UPT_accessors, 0);
ui = _UPT_create(pid);
int ret = unw_init_remote(&cursor, as, ui);
if (ret < 0) {
PRINTF("WARNING: unw_init_remote() failed [pid %i]\n", pid);
_UPT_destroy(ui);
return;
}
PRINTF("DEBUG: backtrace of the remote process (pid %d) using libunwind-ptrace:\n", pid);
do {
unw_word_t ip, sp, offp;
char buf[512];
unw_get_reg(&cursor, UNW_REG_IP, &ip);
unw_get_reg(&cursor, UNW_REG_SP, &sp);
unw_get_proc_name(&cursor, buf, sizeof (buf), &offp);
PRINTF("DEBUG: ip: %10p, sp: %10p %s\n", (void*) ip, (void*) sp, buf);
} while ((ret = unw_step (&cursor)) > 0);
_UPT_destroy (ui);
}
static void
print_trace (void)
{
#ifdef HAVE_LIBUNWIND
unw_context_t uc;
unw_cursor_t cursor;
guint stack_num = 0;
if (!display_filter (DISPLAY_FLAG_BACKTRACE))
return;
unw_getcontext (&uc);
unw_init_local (&cursor, &uc);
while (unw_step (&cursor) > 0)
{
gchar name[129];
unw_word_t off;
int result;
result = unw_get_proc_name (&cursor, name, sizeof (name) - 1, &off);
if (result < 0 && result != UNW_ENOMEM)
{
g_print ("Error getting proc name\n");
break;
}
g_print ("#%d %s + [0x%08x]\n", stack_num++, name, (unsigned int)off);
}
}
int
backtrace(void **trace, int size)
{
unw_cursor_t cursor; unw_context_t uc;
unw_word_t ip;
int n = 0;
unw_getcontext(&uc);
unw_init_local(&cursor, &uc);
while (unw_step(&cursor) > 0) {
unw_get_reg(&cursor, UNW_REG_IP, &ip);
trace[n++] = (void *)ip;
{
char buf[256];
unw_get_proc_name(&cursor, buf, 256, &ip);
if (strncmp("_sigtramp", buf, sizeof("_sigtramp")) == 0) {
goto darwin_sigtramp;
}
}
}
return n;
darwin_sigtramp:
/* darwin's bundled libunwind doesn't support signal trampoline */
{
ucontext_t *uctx;
/* get _sigtramp's ucontext_t and set values to cursor
* http://www.opensource.apple.com/source/Libc/Libc-825.25/i386/sys/_sigtramp.s
* http://www.opensource.apple.com/source/libunwind/libunwind-35.1/src/unw_getcontext.s
*/
unw_get_reg(&cursor, UNW_X86_64_RBX, &ip);
uctx = (ucontext_t *)ip;
unw_set_reg(&cursor, UNW_X86_64_RAX, uctx->uc_mcontext->__ss.__rax);
unw_set_reg(&cursor, UNW_X86_64_RBX, uctx->uc_mcontext->__ss.__rbx);
unw_set_reg(&cursor, UNW_X86_64_RCX, uctx->uc_mcontext->__ss.__rcx);
unw_set_reg(&cursor, UNW_X86_64_RDX, uctx->uc_mcontext->__ss.__rdx);
unw_set_reg(&cursor, UNW_X86_64_RDI, uctx->uc_mcontext->__ss.__rdi);
unw_set_reg(&cursor, UNW_X86_64_RSI, uctx->uc_mcontext->__ss.__rsi);
unw_set_reg(&cursor, UNW_X86_64_RBP, uctx->uc_mcontext->__ss.__rbp);
unw_set_reg(&cursor, UNW_X86_64_RSP, 8+(uctx->uc_mcontext->__ss.__rsp));
unw_set_reg(&cursor, UNW_X86_64_R8, uctx->uc_mcontext->__ss.__r8);
unw_set_reg(&cursor, UNW_X86_64_R9, uctx->uc_mcontext->__ss.__r9);
unw_set_reg(&cursor, UNW_X86_64_R10, uctx->uc_mcontext->__ss.__r10);
unw_set_reg(&cursor, UNW_X86_64_R11, uctx->uc_mcontext->__ss.__r11);
unw_set_reg(&cursor, UNW_X86_64_R12, uctx->uc_mcontext->__ss.__r12);
unw_set_reg(&cursor, UNW_X86_64_R13, uctx->uc_mcontext->__ss.__r13);
unw_set_reg(&cursor, UNW_X86_64_R14, uctx->uc_mcontext->__ss.__r14);
unw_set_reg(&cursor, UNW_X86_64_R15, uctx->uc_mcontext->__ss.__r15);
ip = *(unw_word_t*)uctx->uc_mcontext->__ss.__rsp;
unw_set_reg(&cursor, UNW_REG_IP, ip);
trace[n++] = (void *)uctx->uc_mcontext->__ss.__rip;
trace[n++] = (void *)ip;
}
while (unw_step(&cursor) > 0) {
unw_get_reg(&cursor, UNW_REG_IP, &ip);
trace[n++] = (void *)ip;
}
return n;
}
void
jffi_longjmp (jmp_buf env, int val)
{
extern int _jffi_longjmp_cont;
unw_context_t uc;
unw_cursor_t c;
unw_word_t sp, ip, bp = 0;
uintptr_t *wp = (uintptr_t *) env;
int i, setjmp_frame;
if (unw_getcontext (&uc) < 0 || unw_init_local (&c, &uc) < 0) {
debug("failed to get context");
abort ();
}
#ifdef __x86_86__
# define UNW_REG_BP UNW_X86_64_RBP
#else
# define UNW_REG_BP UNW_X86_EBP
#endif
setjmp_frame = 0;
do {
char name[256];
unw_proc_info_t pi;
unw_word_t off;
if (unw_get_reg (&c, UNW_REG_BP, &bp) < 0) {
abort();
}
if (unw_get_reg (&c, UNW_REG_SP, &sp) < 0) {
abort();
}
if (unw_get_reg (&c, UNW_REG_IP, &ip) < 0) {
abort();
}
unw_get_proc_name(&c, name, sizeof(name), &off);
unw_get_proc_info(&c, &pi);
// debug("frame %s ip=%llx sp=%llx bp=%llx wp[RP]=%p wp[SP]=%p, pi.start_ip=%llx, pi.end_ip=%llx",
// name, (long long) ip, (long long) sp, (long long) bp, (void *) wp[JB_RP], (void *) wp[JB_SP],
// pi.start_ip, pi.end_ip);
if (wp[JB_SP] > sp || wp[JB_RP] < pi.start_ip || wp[JB_RP] > pi.end_ip) continue;
/* found the right frame: */
// debug("found frame to jump back to");
assert (UNW_NUM_EH_REGS >= 2);
if (unw_set_reg (&c, UNW_REG_EH + 0, wp[JB_RP]) < 0
|| unw_set_reg (&c, UNW_REG_EH + 1, val) < 0
|| unw_set_reg (&c, UNW_REG_IP, (unw_word_t) (uintptr_t) &_jffi_longjmp_cont))
abort ();
unw_resume (&c);
// should not reach here
abort ();
} while (unw_step (&c) > 0);
// debug("failed to find correct frame to jmp to");
}
void log_stack_trace(const char *msg)
{
#ifdef USE_UNWIND
unw_context_t ctx;
unw_cursor_t cur;
unw_word_t ip, off;
unsigned level;
char sym[512], *dsym;
int status;
const char *log = stack_trace_log.empty() ? NULL : stack_trace_log.c_str();
#endif
if (msg)
ST_LOG(msg);
ST_LOG("Unwound call stack:");
#ifdef USE_UNWIND
if (unw_getcontext(&ctx) < 0) {
ST_LOG("Failed to create unwind context");
return;
}
if (unw_init_local(&cur, &ctx) < 0) {
ST_LOG("Failed to find the first unwind frame");
return;
}
for (level = 1; level < 999; ++level) { // 999 for safety
int ret = unw_step(&cur);
if (ret < 0) {
ST_LOG("Failed to find the next frame");
return;
}
if (ret == 0)
break;
if (unw_get_reg(&cur, UNW_REG_IP, &ip) < 0) {
ST_LOG(" " << std::setw(4) << level);
continue;
}
if (unw_get_proc_name(&cur, sym, sizeof(sym), &off) < 0) {
ST_LOG(" " << std::setw(4) << level << std::setbase(16) << std::setw(20) << "0x" << ip);
continue;
}
dsym = abi::__cxa_demangle(sym, NULL, NULL, &status);
ST_LOG(" " << std::setw(4) << level << std::setbase(16) << std::setw(20) << "0x" << ip << " " << (!status && dsym ? dsym : sym) << " + " << "0x" << off);
free(dsym);
}
#else
std::stringstream ss;
ss << el::base::debug::StackTrace();
std::vector<std::string> lines;
std::string s = ss.str();
boost::split(lines, s, boost::is_any_of("\n"));
for (const auto &line: lines)
ST_LOG(line);
#endif
}
void
AS_UTL_catchCrash(int sig_num, siginfo_t *info, void *ctx) {
WRITE_STRING("\nFailed with '");
WRITE_STRING(strsignal(sig_num));
WRITE_STRING("'\n");
WRITE_STRING("\nBacktrace (mangled):\n\n");
unw_cursor_t cursor;
unw_context_t uc;
unw_word_t ip, sp;
int depth = 0;
unw_getcontext(&uc); // Get state
unw_init_local(&cursor, &uc); // Initialize state cursor
while (unw_step(&cursor) > 0) {
unw_get_reg(&cursor, UNW_REG_IP, &ip);
unw_get_reg(&cursor, UNW_REG_SP, &sp);
unw_word_t off;
char name[256];
if (unw_get_proc_name (&cursor, name, sizeof (name), &off) == 0) {
if (off)
fprintf(stderr, "%02d <%s + 0x%lx> ip=%lx sp=%lx\n", depth, name, (long)off, ip, sp);
else
fprintf(stderr, "%02d <%s> ip=%lx sp=%lx\n", depth, name, ip, sp);
} else {
fprintf(stderr, "%02d <?> ip=%lx sp=%lx\n", depth, ip, sp);
}
depth++;
}
//WRITE_STRING("\nBacktrace (demangled):\n\n");
//WRITE_STRING("\nGDB:\n\n");
//AS_UTL_envokeGDB();
// Pass the signal through, only so a core file can get generated.
struct sigaction sa;
sa.sa_handler = SIG_DFL;
sigemptyset (&sa.sa_mask);
sa.sa_flags = 0;
sigaction(sig_num, &sa, NULL);
raise(sig_num);
}
void
fill_in_backtrace(FaultData* fdp)
{
unw_context_t uc;
unw_cursor_t c;
int i, boff;
memset(&uc, 0, sizeof(uc));
memset(&c, 0, sizeof(c));
if (unw_getcontext(&uc) < 0) {
abort();
}
if (unw_init_local(&c, &uc) < 0) {
abort();
}
// Skip the signal handler, and the signal trampoline
for (i = 0; i < SKIP_FRAME_COUNT; i++) {
if (unw_step(&c) <= 0) {
break;
}
}
memset(fdp->frame, 0, sizeof(fdp->frame));
fdp->frame_count = 0;
boff = 0;
do {
char fn[256];
unw_word_t off, ip;
Dl_info dli;
unw_proc_info_t pi;
unw_get_reg (&c, UNW_REG_IP, &ip);
fdp->frame[fdp->frame_count].addr = (uintptr_t) ip;
fdp->frame[fdp->frame_count].procname = (uintptr_t) &fdp->backtrace_buf[boff];
unw_get_proc_name(&c, (char *) fdp->frame[fdp->frame_count].procname, sizeof(fdp->backtrace_buf) - boff, &off);
unw_get_proc_info(&c, &pi);
boff += strlen((char *) fdp->frame[fdp->frame_count].procname) + 1;
fdp->frame[fdp->frame_count].libname = (uintptr_t) &fdp->backtrace_buf[boff];
dladdr((void *)(uintptr_t) ip, &dli);
strcpy((char *) (uintptr_t) fdp->frame[fdp->frame_count].libname, dli.dli_fname);
boff += strlen((char *) fdp->frame[fdp->frame_count].libname) + 1;
fdp->frame_count++;
} while (unw_step(&c) > 0);
}
int bt_backtrace(struct bt_data *btd, void** frames, char **buffer, int size, int resolve_name)
{
unw_cursor_t c;
unw_word_t ip, off;
int n = 0, ret;
char buf[512] = "in ";
if (size == 0)
return 0;
if ((ret = unw_init_remote(&c, btd->as, btd->ui)) < 0) {
printf("unw_init_remote() failed.\n");
//debug(1, "bt_backtrace(): unw_init_remote() failed, ret=%d", ret);
return -1;
}
do {
if ((ret = unw_get_reg(&c, UNW_REG_IP, &ip)) < 0) {
//debug(1, "bt_backtrace(): unw_get_reg() failed, ret=%d", ret);
return -1;
}
frames[n] = (void*)ip;
if (resolve_name) {
char* ptr = buf;
ret = unw_get_proc_name(&c, buf + 3, sizeof(buf) - 3, &off);
if (ret < 0) {
ptr = buf + 3;
strcpy(ptr, "<undefined>");
}
else if (off) {
size_t len = strlen(buf);
/* Reserve the last 64 bytes for the offset */
if (len >= sizeof(buf) - 64)
len = sizeof(buf) - 64;
sprintf(buf + len, "+0x%lx", (unsigned long)off);
}
buffer[n] = strdup(ptr);
}
n++;
if ((ret = unw_step(&c)) < 0) {
//debug(1, "bt_backtrace(): unw_step() failed, ret=%d", ret);
return -1;
}
} while (ret > 0 && n < size);
return n;
}
G_GNUC_UNUSED static void
print_ctx (MonoContext *ctx)
{
char name[256];
unw_word_t off, ip, sp;
unw_proc_info_t pi;
int res;
unw_get_proc_name (&ctx->cursor, name, 256, &off);
unw_get_proc_info(&ctx->cursor, &pi);
res = unw_get_reg (&ctx->cursor, UNW_IA64_IP, &ip);
g_assert (res == 0);
res = unw_get_reg (&ctx->cursor, UNW_IA64_SP, &sp);
g_assert (res == 0);
printf ("%s:%lx [%lx-%lx] SP: %lx\n", name, ip - pi.start_ip, pi.start_ip, pi.end_ip, sp);
}
void zmq::print_backtrace (void)
{
static zmq::mutex_t mtx;
mtx.lock ();
Dl_info dl_info;
unw_cursor_t cursor;
unw_context_t ctx;
unsigned frame_n = 0;
unw_getcontext (&ctx);
unw_init_local (&cursor, &ctx);
while (unw_step (&cursor) > 0) {
unw_word_t offset;
unw_proc_info_t p_info;
const char *file_name;
char *demangled_name;
char func_name[256] = "";
void *addr;
int rc;
if (unw_get_proc_info (&cursor, &p_info))
break;
addr = (void *)(p_info.start_ip + offset);
if (dladdr (addr, &dl_info) && dl_info.dli_fname)
file_name = dl_info.dli_fname;
else
file_name = "?";
rc = unw_get_proc_name (&cursor, func_name, 256, &offset);
if (rc == -UNW_ENOINFO)
strcpy(func_name, "?");
demangled_name = abi::__cxa_demangle (func_name, NULL, NULL, &rc);
printf ("#%u %p in %s (%s+0x%lx)\n", frame_n++, addr, file_name,
rc ? func_name : demangled_name, (unsigned long) offset);
free (demangled_name);
}
puts ("");
fflush (stdout);
mtx.unlock ();
}
void do_backtrace() {
unw_cursor_t cursor;
unw_context_t context;
int ret;
ret = unw_getcontext(&context);
if(ret != 0) { printf("[do_backtrace] unw_getcontext returned %d.\n", ret); }
ret = unw_init_local(&cursor, &context);
if(ret != 0) { printf("[do_backtrace] unw_init_local returned %d.\n", ret); }
do {
unw_word_t offset, pc;
char fname[64];
unw_get_reg(&cursor, UNW_REG_IP, &pc);
fname[0]='\0';
(void) unw_get_proc_name(&cursor, fname, sizeof(fname), &offset);
printf("%p : (%s+0x%x) [%p]\n", (void*)pc, fname, (unsigned int)offset, (void*)pc);
}
while(unw_step(&cursor) > 0);
}
void backtrace() {
unw_cursor_t cursor;
unw_context_t context;
unw_getcontext( & context);
unw_init_local( & cursor, & context);
while ( 0 < unw_step( & cursor) ) {
unw_word_t offset, pc;
unw_get_reg( & cursor, UNW_REG_IP, & pc);
if ( 0 == pc) {
break;
}
std::cout << "0x" << pc << ":";
char sym[256];
if ( 0 == unw_get_proc_name( & cursor, sym, sizeof( sym), & offset) ) {
std::cout << " (" << sym << "+0x" << offset << ")" << std::endl;
} else {
std::cout << " -- error: unable to obtain symbol name for this frame" << std::endl;
}
}
}
int bar(const char** list)
{
char functionName[64];
unw_cursor_t cursor;
unw_context_t uc;
unw_word_t offset;
int index = 0;
unw_getcontext(&uc);
unw_init_local(&cursor, &uc);
do {
unw_get_proc_name(&cursor, functionName, 64, &offset);
//fprintf(stderr, "in function: %s\n", functionName);
if ( (list[index] != NULL) && (strcmp(functionName, list[index]) != 0) ) {
//fprintf(stderr, "unexpected function: %s\n", functionName);
exit(1);
}
++index;
} while (unw_step(&cursor) > 0);
return 0;
}
static void
print_trace (void)
{
unw_context_t uc;
unw_cursor_t cursor;
guint stack_num = 0;
unw_getcontext (&uc);
unw_init_local (&cursor, &uc);
while (unw_step (&cursor) > 0 && stack_num < 32)
{
gchar name[256];
unw_word_t off;
if (unw_get_proc_name (&cursor, name, 255, &off) < 0)
strcpy (name, "<no name>");
g_print ("#%d [%s+0x%x]\n", stack_num++, name, (unsigned int)off);
}
}
tt_result_t tt_backtrace_ntv(IN tt_buf_t *buf,
IN OPT const tt_char_t *prefix,
IN OPT const tt_char_t *suffix)
{
tt_u32_t plen, slen, i;
unw_context_t ctx;
unw_cursor_t cur;
if (prefix == NULL) {
prefix = "";
}
plen = (tt_u32_t)tt_strlen(prefix);
if (suffix == NULL) {
suffix = "";
}
slen = (tt_u32_t)tt_strlen(suffix);
if ((unw_getcontext(&ctx) != 0) || (unw_init_local(&cur, &ctx) != 0)) {
return TT_FAIL;
}
i = 0;
while (unw_step(&cur) > 0) {
unw_word_t ip, off;
char name[128] = {0};
if ((unw_get_reg(&cur, UNW_REG_IP, &ip) != 0) ||
(unw_get_proc_name(&cur, name, sizeof(name) - 1, &off)) != 0) {
break;
}
TT_DO_G(done, tt_buf_put(buf, (tt_u8_t *)prefix, plen));
TT_DO_G(done,
tt_buf_putf(buf, "#%d <%p> in %s(+0x%x)", i++, ip, name, off));
TT_DO_G(done, tt_buf_put(buf, (tt_u8_t *)suffix, slen));
}
done:
return TT_SUCCESS;
}
void show_backtrace(void) {
char name[256];
unw_cursor_t cursor; unw_context_t uc;
unw_word_t ip, sp, offp;
unw_getcontext(&uc);
unw_init_local(&cursor, &uc);
while (unw_step(&cursor) > 0)
{
char file[256];
int line = 0;
name[0] = '\0';
unw_get_proc_name(&cursor, name, 256, &offp);
unw_get_reg(&cursor, UNW_REG_IP, &ip);
unw_get_reg(&cursor, UNW_REG_SP, &sp);
//printf ("%s ip = %lx, sp = %lx\n", name, (long) ip, (long) sp);
getFileAndLine((long)ip, file, 256, &line);
printf("%s in file %s line %d\n", name, file, line);
}
}
static void print_backtrace(FILE *f)
{
unw_cursor_t cursor;
unw_context_t ctx;
unw_word_t ip;
unw_getcontext(&ctx);
unw_init_local(&cursor, &ctx);
fprintf(f, " called by:\n");
while (unw_step(&cursor) > 0)
{
Dl_info info;
unw_get_reg(&cursor, UNW_REG_IP, &ip);
if (ip == 0)
break;
dladdr(reinterpret_cast<void *>(ip), &info);
if (info.dli_sname)
{
fprintf(f, " 0x%zx %s+0x%zx (%s)\n", static_cast<uintptr_t>(ip), info.dli_sname,
static_cast<uintptr_t>(ip) - reinterpret_cast<uintptr_t>(info.dli_saddr),
info.dli_fname);
continue;
}
// If dladdr() failed, try libunwind
unw_word_t offsetInFn;
char fnName[MAX_SYMBOL_LENGTH];
if (!unw_get_proc_name(&cursor, fnName, MAX_SYMBOL_LENGTH, &offsetInFn))
{
fprintf(f, " 0x%zx %s+0x%zx (%s)\n", static_cast<uintptr_t>(ip), fnName, offsetInFn,
info.dli_fname);
continue;
}
else
fprintf(f, " 0x%zx\n", static_cast<uintptr_t>(ip));
}
}
static void handler(int sig)
{
unw_cursor_t cursor;
unw_context_t uc;
unw_word_t offp;
char buf[128];
int i = 0;
fprintf(stderr, "Stack trace:\n");
unw_getcontext(&uc);
unw_init_local(&cursor, &uc);
while (unw_step(&cursor) > 0) {
int ret = unw_get_proc_name(&cursor, buf, sizeof buf/sizeof buf[0], &offp);
if (ret == 0) {
printf("%d\t%s + %ld\n", i, buf, offp);
} else {
printf("%d\t???\n", i);
}
i++;
}
exit(EXIT_FAILURE);
}
int
main(int argc , char **argv)
{
unw_addr_space_t as;
unw_cursor_t cursor;
struct UCD_info *ui;
unw_word_t ip, sp, off;
char buf[512], name[256];
int line;
int depth = 0;
int ret;
bool pybt_done = false;
#define TEST_NAME_LEN 256
install_signal_handler();
if (argc != 3) {
fprintf(stderr, "Usage: %s <binary> <corefile>", argv[0]);
exit(1);
}
as = unw_create_addr_space(&_UCD_accessors, 0);
if (!as) {
fprintf(stderr, "unw_create_addr_space() failed");
exit(1);
}
ui = _UCD_create(argv[2]);
if (!ui) {
fprintf(stderr,"_UCD_create('%s') failed", argv[1]);
exit(1);
}
ret = unw_init_remote(&cursor, as, ui);
if (ret < 0) {
fprintf(stderr,"unw_init_remote() failed: ret=%d\n", ret);
exit(1);
}
read_elfnotes(argv[2], ui);
while (unw_step(&cursor) > 0) {
// Avoid going too deep
if (depth++ > MAX_STACK_DEPTH) {
exit(1);
}
unw_get_reg(&cursor, UNW_REG_IP, &ip);
unw_get_reg(&cursor, UNW_REG_SP, &sp);
if (unw_get_proc_name(&cursor, name, sizeof (name), &off) == 0) {
if (off) {
snprintf(buf, sizeof (buf), "<%s+0x%lx>", name, (long) off);
} else {
snprintf(buf, sizeof (buf), "<%s>", name);
}
}
/* Check for Python backtrace */
if (!strncmp(name,"PyEval_EvalFrameEx", 18) && !pybt_done) {
pybacktrace(cursor);
pybt_done = true;
}
rw_get_file_and_line((long)ip, name, argv[1], 256, &line);
printf("%016lx %s <%s:%d> (sp=%016lx)\n",
(long) ip, buf, basename(name), line, (long) sp);
}
_UCD_destroy(ui);
unw_destroy_addr_space(as);
return 0;
}
static void chpl_stack_unwind(void){
// This is just a prototype using libunwind
unw_cursor_t cursor;
unw_context_t uc;
unw_word_t wordValue;
char buffer[128];
unsigned int line;
#ifdef __linux__
unw_proc_info_t info;
// Get the exec path and name for the precise line printing
char process_name[128];
line = readlink("/proc/self/exe", process_name, sizeof(process_name));
// It unlikely to happen but this means that the process name is too big
// for our buffer. In this case, we truncate the name
if(line == sizeof(process_name))
line = sizeof(process_name)-1;
process_name[line] = '\0';
#endif
// Check if we need to print the stack trace (default = yes)
if(! chpl_get_rt_env_bool("UNWIND", true)) {
return;
}
line = 0;
unw_getcontext(&uc);
unw_init_local(&cursor, &uc);
if(chpl_sizeSymTable > 0)
fprintf(stderr,"Stacktrace\n\n");
// This loop does the effective stack unwind, see libunwind documentation
while (unw_step(&cursor) > 0) {
unw_get_proc_name(&cursor, buffer, sizeof(buffer), &wordValue);
// Since this stack trace is printed out a program exit, we do not believe
// it is performance sensitive. Additionally, this initial implementation
// favors simplicity over performance.
//
// If it becomes necessary to improve performance, this code could use be
// faster using one of these two strategies:
// 1) Use a hashtable or map to find entries in chpl_funSymTable, or
// 2) Emit chpl_funSymTable in sorted order and use binary search on it
for(int t = 0; t < chpl_sizeSymTable; t+=2 ){
if (!strcmp(chpl_funSymTable[t], buffer)){
#ifdef __linux__
// Maybe we can get a more precise line number
unw_get_proc_info(&cursor, &info);
line = chpl_unwind_getLineNum(process_name,
(void *)(info.start_ip + wordValue));
// We wasn't able to obtain the line number, let's use the procedure
// line number
if(line == 0)
line = chpl_filenumSymTable[t+1];
#else
line = chpl_filenumSymTable[t+1];
#endif
fprintf(stderr,"%s() at %s:%d\n",
chpl_funSymTable[t+1],
chpl_lookupFilename(chpl_filenumSymTable[t]),
line);
break;
}
}
}
}
int
main(int argc UNUSED, char **argv)
{
unw_addr_space_t as;
struct UCD_info *ui;
unw_cursor_t c;
int ret;
#define TEST_FRAMES 4
#define TEST_NAME_LEN 32
int testcase = 0;
int test_cur = 0;
long test_start_ips[TEST_FRAMES];
char test_names[TEST_FRAMES][TEST_NAME_LEN];
install_sigsegv_handler();
const char *progname = strrchr(argv[0], '/');
if (progname)
progname++;
else
progname = argv[0];
if (!argv[1])
error_msg_and_die("Usage: %s COREDUMP [VADDR:BINARY_FILE]...", progname);
msg_prefix = progname;
as = unw_create_addr_space(&_UCD_accessors, 0);
if (!as)
error_msg_and_die("unw_create_addr_space() failed");
ui = _UCD_create(argv[1]);
if (!ui)
error_msg_and_die("_UCD_create('%s') failed", argv[1]);
ret = unw_init_remote(&c, as, ui);
if (ret < 0)
error_msg_and_die("unw_init_remote() failed: ret=%d\n", ret);
argv += 2;
/* Enable checks for the crasher test program? */
if (*argv && !strcmp(*argv, "-testcase"))
{
testcase = 1;
logmode = LOGMODE_NONE;
argv++;
}
while (*argv)
{
char *colon;
unsigned long vaddr = strtoul(*argv, &colon, 16);
if (*colon != ':')
error_msg_and_die("Bad format: '%s'", *argv);
if (_UCD_add_backing_file_at_vaddr(ui, vaddr, colon + 1) < 0)
error_msg_and_die("Can't add backing file '%s'", colon + 1);
argv++;
}
for (;;)
{
unw_word_t ip;
ret = unw_get_reg(&c, UNW_REG_IP, &ip);
if (ret < 0)
error_msg_and_die("unw_get_reg(UNW_REG_IP) failed: ret=%d\n", ret);
unw_proc_info_t pi;
ret = unw_get_proc_info(&c, &pi);
if (ret < 0)
error_msg_and_die("unw_get_proc_info(ip=0x%lx) failed: ret=%d\n", (long) ip, ret);
if (!testcase)
printf("\tip=0x%08lx proc=%08lx-%08lx handler=0x%08lx lsda=0x%08lx\n",
(long) ip,
(long) pi.start_ip, (long) pi.end_ip,
(long) pi.handler, (long) pi.lsda);
if (testcase && test_cur < TEST_FRAMES)
{
unw_word_t off;
test_start_ips[test_cur] = (long) pi.start_ip;
if (unw_get_proc_name(&c, test_names[test_cur], sizeof(test_names[0]), &off) != 0)
{
test_names[test_cur][0] = '\0';
}
test_cur++;
}
log("step");
ret = unw_step(&c);
log("step done:%d", ret);
if (ret < 0)
error_msg_and_die("FAILURE: unw_step() returned %d", ret);
if (ret == 0)
break;
}
log("stepping ended");
/* Check that the second and third frames are equal, but distinct of the
* others */
if (testcase &&
(test_cur != 4
|| test_start_ips[1] != test_start_ips[2]
|| test_start_ips[0] == test_start_ips[1]
|| test_start_ips[2] == test_start_ips[3]
)
)
{
fprintf(stderr, "FAILURE: start IPs incorrect\n");
return -1;
}
if (testcase &&
( strcmp(test_names[0], "a")
|| strcmp(test_names[1], "b")
|| strcmp(test_names[2], "b")
|| strcmp(test_names[3], "main")
)
)
{
fprintf(stderr, "FAILURE: procedure names are missing/incorrect\n");
return -1;
}
_UCD_destroy(ui);
unw_destroy_addr_space(as);
return 0;
}
static struct frame* unwind_thread(Dwfl *dwfl, unw_addr_space_t as,
struct UCD_info *ui, int thread_no,
struct expr_context *ctx)
{
info("thread %d:", thread_no);
int i, ret;
unw_cursor_t c, c_cfa;
_UCD_select_thread(ui, thread_no);
ret = unw_init_remote(&c, as, ui);
fail_if(ret < 0, "unw_init_remote");
ret = unw_init_remote(&c_cfa, as, ui);
fail_if(ret < 0, "unw_init_remote");
struct frame *head = NULL, *tail = NULL;
/* infinite loop insurance */
int count = 1000;
while (--count > 0)
{
unw_word_t ip;
ret = unw_get_reg(&c, UNW_REG_IP, &ip);
fail_if(ret < 0, "unw_get_reg");
if (ip == 0)
break;
unw_word_t off;
char funcname[10*1024];
funcname[0] = '\0';
ret = unw_get_proc_name(&c, funcname, sizeof(funcname)-1, &off);
if (ret < 0)
{
warn("unw_get_proc_name failed for IP %lx", (unsigned long)ip);
}
info("\t%llx %s", (unsigned long long)ip, funcname);
/* According to spec[1], CFA is RSP of the previous frame. However,
* libunwind returns CFA = RSP of the current frame. So we need to keep
* track of the previous (i.e. next to be unwound) frame.
*
* [1] System V Application Binary Interface AMD64 Architecture
* Processor Supplement
* http://www.x86-64.org/documentation/abi.pdf
*/
ctx->cfa = 0;
ret = unw_step(&c_cfa);
if (ret > 0)
{
unw_word_t cfa;
ret = unw_get_reg(&c_cfa, UNW_X86_64_CFA, &cfa);
if (ret == 0)
{
ctx->cfa = (Dwarf_Addr)cfa;
}
}
/* find compilation unit owning the IP */
Dwarf_Die *cu = dwfl_addrdie(dwfl, (Dwarf_Addr)ip, &(ctx->bias));
if (!cu)
{
warn("\t\tcannot find CU for ip %lx", (unsigned long)ip);
goto synth_frame;
}
if (!supported_language(cu))
{
warn("\t\tunsupported CU language");
goto synth_frame;
}
/* needed by child_variables */
Dwarf_Files *files;
ret = dwarf_getsrcfiles(cu, &files, NULL);
fail_if(ret == -1, "dwarf_getsrcfiles");
/* dwarf expression evaluation needs register values */
ctx->curs = &c;
ctx->ip = (Dwarf_Addr)ip; /* TODO: subtract 1 as this is return address? */
/* TODO: we have CU - fall back to CU name if subprogram not found */
/* Following code deals with inlined functions, which do not have their
* own stack frame. It is somewhat ugly due to two constraints:
* - we want to produce at least one frame even if analyze_scopes
* fails
* - we may want to further process the frame that is returned the
* last, i.e. the one that belongs to the non-inlined function
*/
Dwarf_Die *scopes;
int nscopes = dwarf_getscopes(cu, (Dwarf_Addr)ip, &scopes);
struct frame *frame = analyze_scopes(&scopes, &nscopes, ctx, files, false);
if (frame == NULL)
{
goto synth_frame;
}
struct frame *last_frame;
while (frame)
{
list_append(head, tail, frame);
last_frame = frame;
frame = analyze_scopes(&scopes, &nscopes, ctx, files, true);
}
frame = last_frame;
/* frame->ip = (uint64_t)ip; */
goto next;
synth_frame:
/* synthesize frame even though we have no other information except
* that it's there */
frame = xalloc(sizeof(*frame));
list_append(head, tail, frame);
/* frame->ip = (uint64_t)ip; */
next:
ret = unw_step(&c);
fail_if(ret < 0, "unw_step");
if (ret == 0)
break;
}
return head;
}
static void print_stack_trace(pid_t pid, int * count)
{
void * pinfo = NULL;
unw_addr_space_t aspace = NULL;
unw_cursor_t cursor;
unw_word_t ip, sp;
char nbuf[256];
unw_word_t off;
int ret;
if (ptrace(PTRACE_ATTACH, pid, NULL, NULL) < 0) {
fprintf(stderr,
"Failed to attach to process %llu: %s\n",
(unsigned long long)pid, strerror(errno));
return;
}
/* Wait until the attach is complete. */
waitpid(pid, NULL, 0);
if (((pinfo = _UPT_create(pid)) == NULL) ||
((aspace = unw_create_addr_space(&_UPT_accessors, 0)) == NULL)) {
/* Probably out of memory. */
fprintf(stderr,
"Unable to initialize stack unwind for process %llu\n",
(unsigned long long)pid);
goto cleanup;
}
if ((ret = unw_init_remote(&cursor, aspace, pinfo))) {
fprintf(stderr,
"Unable to unwind stack for process %llu: %s\n",
(unsigned long long)pid, unw_strerror(ret));
goto cleanup;
}
if (*count > 0) {
printf("\n");
}
if (procname(pid, nbuf, sizeof(nbuf))) {
printf("Stack trace for process %llu (%s):\n",
(unsigned long long)pid, nbuf);
} else {
printf("Stack trace for process %llu:\n",
(unsigned long long)pid);
}
while (unw_step(&cursor) > 0) {
ip = sp = off = 0;
unw_get_reg(&cursor, UNW_REG_IP, &ip);
unw_get_reg(&cursor, UNW_REG_SP, &sp);
ret = unw_get_proc_name(&cursor, nbuf, sizeof(nbuf), &off);
if (ret != 0 && ret != -UNW_ENOMEM) {
snprintf(nbuf, sizeof(nbuf), "<unknown symbol>");
}
printf(" %s + %#llx [ip=%#llx] [sp=%#llx]\n",
nbuf, (long long)off, (long long)ip,
(long long)sp);
}
(*count)++;
cleanup:
if (aspace) {
unw_destroy_addr_space(aspace);
}
if (pinfo) {
_UPT_destroy(pinfo);
}
ptrace(PTRACE_DETACH, pid, NULL, NULL);
}