michael@0: /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
michael@0: /* vim: set ts=8 sts=4 et sw=4 tw=99: */
michael@0: /* This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #include "xpcprivate.h"
michael@0: #include "jsprf.h"
michael@0: #include "js/OldDebugAPI.h"
michael@0: 
michael@0: #ifdef XP_WIN
michael@0: #include <windows.h>
michael@0: #endif
michael@0: 
michael@0: static void DebugDump(const char* fmt, ...)
michael@0: {
michael@0:   char buffer[2048];
michael@0:   va_list ap;
michael@0:   va_start(ap, fmt);
michael@0: #ifdef XPWIN
michael@0:   _vsnprintf(buffer, sizeof(buffer), fmt, ap);
michael@0: #else
michael@0:   vsnprintf(buffer, sizeof(buffer), fmt, ap);
michael@0: #endif
michael@0:   buffer[sizeof(buffer)-1] = '\0';
michael@0:   va_end(ap);
michael@0: #ifdef XP_WIN
michael@0:   if (IsDebuggerPresent()) {
michael@0:     OutputDebugStringA(buffer);
michael@0:   }
michael@0: #endif
michael@0:   printf("%s", buffer);
michael@0: }
michael@0: 
michael@0: bool
michael@0: xpc_DumpJSStack(JSContext* cx, bool showArgs, bool showLocals, bool showThisProps)
michael@0: {
michael@0:     if (char* buf = xpc_PrintJSStack(cx, showArgs, showLocals, showThisProps)) {
michael@0:         DebugDump("%s\n", buf);
michael@0:         JS_smprintf_free(buf);
michael@0:     }
michael@0:     return true;
michael@0: }
michael@0: 
michael@0: char*
michael@0: xpc_PrintJSStack(JSContext* cx, bool showArgs, bool showLocals,
michael@0:                  bool showThisProps)
michael@0: {
michael@0:     JS::AutoSaveExceptionState state(cx);
michael@0: 
michael@0:     char *buf = JS::FormatStackDump(cx, nullptr, showArgs, showLocals, showThisProps);
michael@0:     if (!buf)
michael@0:         DebugDump("%s", "Failed to format JavaScript stack for dump\n");
michael@0: 
michael@0:     state.restore();
michael@0:     return buf;
michael@0: }
michael@0: 
michael@0: /***************************************************************************/
michael@0: 
michael@0: static void
michael@0: xpcDumpEvalErrorReporter(JSContext *cx, const char *message,
michael@0:                          JSErrorReport *report)
michael@0: {
michael@0:     DebugDump("Error: %s\n", message);
michael@0: }
michael@0: 
michael@0: bool
michael@0: xpc_DumpEvalInJSStackFrame(JSContext* cx, uint32_t frameno, const char* text)
michael@0: {
michael@0:     if (!cx || !text) {
michael@0:         DebugDump("%s", "invalid params passed to xpc_DumpEvalInJSStackFrame!\n");
michael@0:         return false;
michael@0:     }
michael@0: 
michael@0:     DebugDump("js[%d]> %s\n", frameno, text);
michael@0: 
michael@0:     uint32_t num = 0;
michael@0: 
michael@0:     JSAbstractFramePtr frame = JSNullFramePtr();
michael@0: 
michael@0:     JSBrokenFrameIterator iter(cx);
michael@0:     while (!iter.done()) {
michael@0:         if (num == frameno) {
michael@0:             frame = iter.abstractFramePtr();
michael@0:             break;
michael@0:         }
michael@0:         ++iter;
michael@0:         num++;
michael@0:     }
michael@0: 
michael@0:     if (!frame) {
michael@0:         DebugDump("%s", "invalid frame number!\n");
michael@0:         return false;
michael@0:     }
michael@0: 
michael@0:     JS::AutoSaveExceptionState exceptionState(cx);
michael@0:     JSErrorReporter older = JS_SetErrorReporter(cx, xpcDumpEvalErrorReporter);
michael@0: 
michael@0:     JS::RootedValue rval(cx);
michael@0:     JSString* str;
michael@0:     JSAutoByteString bytes;
michael@0:     if (frame.evaluateInStackFrame(cx, text, strlen(text), "eval", 1, &rval) &&
michael@0:         nullptr != (str = ToString(cx, rval)) &&
michael@0:         bytes.encodeLatin1(cx, str)) {
michael@0:         DebugDump("%s\n", bytes.ptr());
michael@0:     } else {
michael@0:         DebugDump("%s", "eval failed!\n");
michael@0:     }
michael@0: 
michael@0:     JS_SetErrorReporter(cx, older);
michael@0:     exceptionState.restore();
michael@0:     return true;
michael@0: }
michael@0: 
michael@0: /***************************************************************************/
michael@0: 
michael@0: JSTrapStatus
michael@0: xpc_DebuggerKeywordHandler(JSContext *cx, JSScript *script, jsbytecode *pc,
michael@0:                            jsval *rval, void *closure)
michael@0: {
michael@0:     static const char line[] =
michael@0:     "------------------------------------------------------------------------\n";
michael@0:     DebugDump("%s", line);
michael@0:     DebugDump("%s", "Hit JavaScript \"debugger\" keyword. JS call stack...\n");
michael@0:     xpc_DumpJSStack(cx, true, true, false);
michael@0:     DebugDump("%s", line);
michael@0:     return JSTRAP_CONTINUE;
michael@0: }
michael@0: 
michael@0: bool xpc_InstallJSDebuggerKeywordHandler(JSRuntime* rt)
michael@0: {
michael@0:     return JS_SetDebuggerHandler(rt, xpc_DebuggerKeywordHandler, nullptr);
michael@0: }