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gdbstub: Catch and report more vmstop reasons 

When the VM goes into stop state while there is a gdb frontend attached,
it makes sense to inform gdb about this fact and at least a bit about
the stop reason. Basically, all stops are interesting except for the
temporary VMSTOP_SAVE/LOADVM.

The patch maps the relevant VMSTOP reasons on unique and more or less
associatable signals that gdb understands.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
This commit is contained in:
Jan Kiszka 2011-03-22 11:02:09 +01:00 committed by Aurelien Jarno
parent 2917dce477
commit 425189a8ff
1 changed files with 39 additions and 10 deletions
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49
gdbstub.c
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@ -45,7 +45,12 @@
enum {
GDB_SIGNAL_0 = 0,
GDB_SIGNAL_INT = 2,
GDB_SIGNAL_QUIT = 3,
GDB_SIGNAL_TRAP = 5,
GDB_SIGNAL_ABRT = 6,
GDB_SIGNAL_ALRM = 14,
GDB_SIGNAL_IO = 23,
GDB_SIGNAL_XCPU = 24,
GDB_SIGNAL_UNKNOWN = 143
};
@ -2270,14 +2275,11 @@ static void gdb_vm_state_change(void *opaque, int running, int reason)
const char *type;
int ret;
if (running || (reason != VMSTOP_DEBUG && reason != VMSTOP_USER) ||
s->state == RS_INACTIVE || s->state == RS_SYSCALL) {
if (running || s->state == RS_INACTIVE || s->state == RS_SYSCALL) {
return;
}
/* disable single step if it was enable */
cpu_single_step(env, 0);
if (reason == VMSTOP_DEBUG) {
switch (reason) {
case VMSTOP_DEBUG:
if (env->watchpoint_hit) {
switch (env->watchpoint_hit->flags & BP_MEM_ACCESS) {
case BP_MEM_READ:
@ -2294,17 +2296,44 @@ static void gdb_vm_state_change(void *opaque, int running, int reason)
"T%02xthread:%02x;%swatch:" TARGET_FMT_lx ";",
GDB_SIGNAL_TRAP, gdb_id(env), type,
env->watchpoint_hit->vaddr);
put_packet(s, buf);
env->watchpoint_hit = NULL;
return;
goto send_packet;
}
tb_flush(env);
tb_flush(env);
ret = GDB_SIGNAL_TRAP;
} else {
break;
case VMSTOP_USER:
ret = GDB_SIGNAL_INT;
break;
case VMSTOP_SHUTDOWN:
ret = GDB_SIGNAL_QUIT;
break;
case VMSTOP_DISKFULL:
ret = GDB_SIGNAL_IO;
break;
case VMSTOP_WATCHDOG:
ret = GDB_SIGNAL_ALRM;
break;
case VMSTOP_PANIC:
ret = GDB_SIGNAL_ABRT;
break;
case VMSTOP_SAVEVM:
case VMSTOP_LOADVM:
return;
case VMSTOP_MIGRATE:
ret = GDB_SIGNAL_XCPU;
break;
default:
ret = GDB_SIGNAL_UNKNOWN;
break;
}
snprintf(buf, sizeof(buf), "T%02xthread:%02x;", ret, gdb_id(env));
send_packet:
put_packet(s, buf);
/* disable single step if it was enabled */
cpu_single_step(env, 0);
}
#endif