/// Attach the debugger if this is enabled in the config
static void may_attach_debugger()
{
if (get_config_entry("hpx.attach-debugger", "") == "test-failure")
{
attach_debugger();
}
}
intptr_t ExcDlgProc(Dialog* Dlg,intptr_t Msg,intptr_t Param1,void* Param2)
{
switch (Msg)
{
case DN_CTLCOLORDLGITEM:
{
FarDialogItem di;
Dlg->SendMessage(DM_GETDLGITEMSHORT,Param1,&di);
if (di.Type==DI_EDIT)
{
auto Color = colors::PaletteColorToFarColor(COL_WARNDIALOGTEXT);
auto Colors = static_cast<FarDialogItemColors*>(Param2);
Colors->Colors[0] = Color;
Colors->Colors[2] = Color;
}
}
break;
case DN_CONTROLINPUT:
{
const INPUT_RECORD* record=(const INPUT_RECORD *)Param2;
if (record->EventType==KEY_EVENT)
{
int key = InputRecordToKey(record);
if (Param1==10 && (key==KEY_LEFT || key == KEY_NUMPAD4 || key==KEY_SHIFTTAB))
{
Dlg->SendMessage(DM_SETFOCUS,12,0);
return TRUE;
}
else if (Param1==12 && (key==KEY_RIGHT || key == KEY_NUMPAD6 || key==KEY_TAB))
{
Dlg->SendMessage(DM_SETFOCUS,10,0);
return TRUE;
}
}
}
break;
case DN_CLOSE:
{
if (Param1 == 11) // debug
{
// It's better to attach debugger ASAP, closing the dialog causes too much work in window manager
attach_debugger();
return FALSE;
}
}
break;
default:
break;
}
return Dlg->DefProc(Msg,Param1,Param2);
}
int tracer(int (*init_proc)(void *), void *sp)
{
void *task = NULL;
unsigned long eip = 0;
int status, pid = 0, sig = 0, cont_type, tracing = 0, op = 0;
int last_index, proc_id = 0, n, err, old_tracing = 0, strace = 0;
capture_signal_stack();
signal(SIGPIPE, SIG_IGN);
setup_tracer_winch();
tracing_pid = os_getpid();
printf("tracing thread pid = %d\n", tracing_pid);
pid = clone(signal_tramp, sp, CLONE_FILES | SIGCHLD, init_proc);
CATCH_EINTR(n = waitpid(pid, &status, WUNTRACED));
if(n < 0){
printf("waitpid on idle thread failed, errno = %d\n", errno);
exit(1);
}
if((ptrace(PTRACE_CONT, pid, 0, 0) < 0)){
printf("Failed to continue idle thread, errno = %d\n", errno);
exit(1);
}
signal(SIGSEGV, (sighandler_t) tracer_segv);
signal(SIGUSR1, signal_usr1);
if(debug_trace){
printf("Tracing thread pausing to be attached\n");
stop();
}
if(debug){
if(gdb_pid != -1)
debugger_pid = attach_debugger(pid, gdb_pid, 1);
else debugger_pid = init_ptrace_proxy(pid, 1, debug_stop);
if(debug_parent){
debugger_parent = os_process_parent(debugger_pid);
init_parent_proxy(debugger_parent);
err = attach(debugger_parent);
if(err){
printf("Failed to attach debugger parent %d, "
"errno = %d\n", debugger_parent, -err);
debugger_parent = -1;
}
else {
if(ptrace(PTRACE_SYSCALL, debugger_parent,
0, 0) < 0){
printf("Failed to continue debugger "
"parent, errno = %d\n", errno);
debugger_parent = -1;
}
}
}
}
set_cmdline("(tracing thread)");
while(1){
CATCH_EINTR(pid = waitpid(-1, &status, WUNTRACED));
if(pid <= 0){
if(errno != ECHILD){
printf("wait failed - errno = %d\n", errno);
}
continue;
}
if(pid == debugger_pid){
int cont = 0;
if(WIFEXITED(status) || WIFSIGNALED(status))
debugger_pid = -1;
/* XXX Figure out how to deal with gdb and SMP */
else cont = debugger_signal(status, cpu_tasks[0].pid);
if(cont == PTRACE_SYSCALL) strace = 1;
continue;
}
else if(pid == debugger_parent){
debugger_parent_signal(status, pid);
continue;
}
nsignals++;
if(WIFEXITED(status)) ;
#ifdef notdef
{
printf("Child %d exited with status %d\n", pid,
WEXITSTATUS(status));
}
#endif
else if(WIFSIGNALED(status)){
sig = WTERMSIG(status);
if(sig != 9){
printf("Child %d exited with signal %d\n", pid,
sig);
}
}
else if(WIFSTOPPED(status)){
proc_id = pid_to_processor_id(pid);
sig = WSTOPSIG(status);
if(signal_index[proc_id] == 1024){
signal_index[proc_id] = 0;
last_index = 1023;
}
else last_index = signal_index[proc_id] - 1;
if(((sig == SIGPROF) || (sig == SIGVTALRM) ||
(sig == SIGALRM)) &&
(signal_record[proc_id][last_index].signal == sig)&&
(signal_record[proc_id][last_index].pid == pid))
signal_index[proc_id] = last_index;
signal_record[proc_id][signal_index[proc_id]].pid = pid;
gettimeofday(&signal_record[proc_id][signal_index[proc_id]].time, NULL);
eip = ptrace(PTRACE_PEEKUSER, pid, PT_IP_OFFSET, 0);
signal_record[proc_id][signal_index[proc_id]].addr = eip;
signal_record[proc_id][signal_index[proc_id]++].signal = sig;
if(proc_id == -1){
sleeping_process_signal(pid, sig);
continue;
}
task = cpu_tasks[proc_id].task;
tracing = is_tracing(task);
old_tracing = tracing;
switch(sig){
case SIGUSR1:
sig = 0;
op = do_proc_op(task, proc_id);
switch(op){
case OP_TRACE_ON:
arch_leave_kernel(task, pid);
tracing = 1;
break;
case OP_REBOOT:
case OP_HALT:
unmap_physmem();
kmalloc_ok = 0;
ptrace(PTRACE_KILL, pid, 0, 0);
return(op == OP_REBOOT);
case OP_NONE:
printf("Detaching pid %d\n", pid);
detach(pid, SIGSTOP);
continue;
default:
break;
}
/* OP_EXEC switches host processes on us,
* we want to continue the new one.
*/
pid = cpu_tasks[proc_id].pid;
break;
case SIGTRAP:
if(!tracing && (debugger_pid != -1)){
child_signal(pid, status);
continue;
}
tracing = 0;
if(do_syscall(task, pid))
sig = SIGUSR2;
else clear_singlestep(task);
break;
case SIGPROF:
if(tracing) sig = 0;
break;
case SIGCHLD:
case SIGHUP:
sig = 0;
break;
case SIGSEGV:
case SIGIO:
case SIGALRM:
case SIGVTALRM:
case SIGFPE:
case SIGBUS:
case SIGILL:
case SIGWINCH:
default:
tracing = 0;
break;
}
set_tracing(task, tracing);
if(!tracing && old_tracing)
arch_enter_kernel(task, pid);
if(!tracing && (debugger_pid != -1) && (sig != 0) &&
(sig != SIGALRM) && (sig != SIGVTALRM) &&
(sig != SIGSEGV) && (sig != SIGTRAP) &&
(sig != SIGUSR2) && (sig != SIGIO) &&
(sig != SIGFPE)){
child_signal(pid, status);
continue;
}
if(tracing){
if(singlestepping_tt(task))
cont_type = PTRACE_SINGLESTEP;
else cont_type = PTRACE_SYSCALL;
}
else cont_type = PTRACE_CONT;
if((cont_type == PTRACE_CONT) &&
(debugger_pid != -1) && strace)
cont_type = PTRACE_SYSCALL;
if(ptrace(cont_type, pid, 0, sig) != 0){
tracer_panic("ptrace failed to continue "
"process - errno = %d\n",
errno);
}
}
}
