void breakpoint_destroy(struct breakpoint *b) {
if (b != NULL) {
breakpoint_clear(b);
if (b->where != NULL)
free(b->where);
free(b);
}
}
/*
* This just lets you punch in one-liners and Lua will run them as individual
* chunks, but you can completely access all Lua state, including calling C
* functions and altering tables. At this time, it's more of a "console"
* than a debugger. You can do "p MojoLua_debugger()" from gdb to launch this
* from a breakpoint in native code, or call MojoSetup.debugger() to launch
* it from Lua code (with stacktrace intact, too: type 'bt' to see it).
*/
static int
luahook_debugger(lua_State *L)
{
virgo_t* v = virgo__lua_context(L);
#if DISABLE_LUA_PARSER
logError(v, "Lua debugger is disabled in this build (no parser).");
#else
int origtop;
const virgo_log_level_e origloglevel = virgo_log_level_get(v);
lua_pushcfunction(L, luahook_stackwalk);
origtop = lua_gettop(L);
printf("Quick and dirty Lua debugger. Type 'exit' to quit.\n");
while (1)
{
char *buf = (char *) scratchbuf;
int len = 0;
printf("> ");
fflush(stdout);
if (fgets(buf, sizeof (scratchbuf), stdin) == NULL)
{
printf("\n\n fgets() on stdin failed: ");
break;
}
len = (int) (strlen(buf) - 1);
while ( (len >= 0) && ((buf[len] == '\n') || (buf[len] == '\r')) )
buf[len--] = '\0';
if (strcmp(buf, "q") == 0)
break;
else if (strcmp(buf, "quit") == 0)
break;
else if (strcmp(buf, "exit") == 0)
break;
else if (strncmp(buf, "break ", 6) == 0) {
int lineno = 0;
char *p = strrchr(buf, ':');
if (p != NULL) {
lineno = atoi(p+1);
*p = '\0';
}
breakpoint_add(buf+6, lineno);
printf("Adding breakpoing to %s at line %d\n", buf+6, lineno);
lua_sethook(L, debugger_breakpoint, LUA_MASKLINE, 0);
continue;
}
else if (strncmp(buf, "clear ", 6) == 0) {
int lineno = 0;
char *p = strrchr(buf, ':');
if (p != NULL) {
lineno = atoi(p+1);
*p = '\0';
}
breakpoint_clear(buf+6, lineno);
printf("Clearing breakpoing to %s at line %d\n", buf+6, lineno);
lua_sethook(L, debugger_breakpoint, 0, 0);
continue;
}
else if (strcmp(buf, "clearall") == 0) {
breakpoint_clearall();
lua_sethook(L, debugger_breakpoint, 0, 0);
printf("All breakpoints cleared\n");
continue;
}
else if (strcmp(buf, "trace") == 0) {
if (debugger_trace_enabled == 0) {
lua_sethook(L, debugger_trace, LUA_MASKLINE, 0);
debugger_trace_enabled = 1;
printf("Tracing enabled!\n");
}
else {
lua_sethook(L, debugger_trace, 0, 0);
debugger_trace_enabled = 0;
printf("Tracing disabled!\n");
}
continue;
}
else if (strcmp(buf, "bt") == 0)
{
/*MojoLog_logLevel = MOJOSETUP_LOG_EVERYTHING;*/
virgo_log_level_set(v, VIRGO_LOG_EVERYTHING);
strcpy(buf, "virgo_stackwalk()");
}
if ( (luaL_loadstring(L, buf) != 0) ||
(lua_pcall(L, 0, LUA_MULTRET, -2) != 0) )
{
printf("%s\n", lua_tostring(L, -1));
lua_pop(L, 1);
}
else
{
printf("Returned %d values.\n", lua_gettop(L) - origtop);
while (lua_gettop(L) != origtop)
{
/*!!! FIXME: dump details of values to stdout here.*/
lua_pop(L, 1);
}
printf("\n");
}
/*MojoLog_logLevel = origloglevel;*/
virgo_log_level_set(v, origloglevel);
}
lua_pop(L, 1);
printf("exiting debugger...\n");
/*#endif*/
return 0;
}
