The Tor Browser / file comparison
comparison: js/xpconnect/src/XPCDebug.cpp
js/xpconnect/src/XPCDebug.cpp
- branch
- TOR_BUG_3246
- changeset 7
- 129ffea94266
equal
deleted
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replaced
| -1:000000000000 | 0:10dc2a7fdf94 |
|---|---|
| 1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ | |
| 2 /* vim: set ts=8 sts=4 et sw=4 tw=99: */ | |
| 3 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 4 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 6 | |
| 7 #include "xpcprivate.h" | |
| 8 #include "jsprf.h" | |
| 9 #include "js/OldDebugAPI.h" | |
| 10 | |
| 11 #ifdef XP_WIN | |
| 12 #include <windows.h> | |
| 13 #endif | |
| 14 | |
| 15 static void DebugDump(const char* fmt, ...) | |
| 16 { | |
| 17 char buffer[2048]; | |
| 18 va_list ap; | |
| 19 va_start(ap, fmt); | |
| 20 #ifdef XPWIN | |
| 21 _vsnprintf(buffer, sizeof(buffer), fmt, ap); | |
| 22 #else | |
| 23 vsnprintf(buffer, sizeof(buffer), fmt, ap); | |
| 24 #endif | |
| 25 buffer[sizeof(buffer)-1] = '\0'; | |
| 26 va_end(ap); | |
| 27 #ifdef XP_WIN | |
| 28 if (IsDebuggerPresent()) { | |
| 29 OutputDebugStringA(buffer); | |
| 30 } | |
| 31 #endif | |
| 32 printf("%s", buffer); | |
| 33 } | |
| 34 | |
| 35 bool | |
| 36 xpc_DumpJSStack(JSContext* cx, bool showArgs, bool showLocals, bool showThisProps) | |
| 37 { | |
| 38 if (char* buf = xpc_PrintJSStack(cx, showArgs, showLocals, showThisProps)) { | |
| 39 DebugDump("%s\n", buf); | |
| 40 JS_smprintf_free(buf); | |
| 41 } | |
| 42 return true; | |
| 43 } | |
| 44 | |
| 45 char* | |
| 46 xpc_PrintJSStack(JSContext* cx, bool showArgs, bool showLocals, | |
| 47 bool showThisProps) | |
| 48 { | |
| 49 JS::AutoSaveExceptionState state(cx); | |
| 50 | |
| 51 char *buf = JS::FormatStackDump(cx, nullptr, showArgs, showLocals, showThisProps); | |
| 52 if (!buf) | |
| 53 DebugDump("%s", "Failed to format JavaScript stack for dump\n"); | |
| 54 | |
| 55 state.restore(); | |
| 56 return buf; | |
| 57 } | |
| 58 | |
| 59 /***************************************************************************/ | |
| 60 | |
| 61 static void | |
| 62 xpcDumpEvalErrorReporter(JSContext *cx, const char *message, | |
| 63 JSErrorReport *report) | |
| 64 { | |
| 65 DebugDump("Error: %s\n", message); | |
| 66 } | |
| 67 | |
| 68 bool | |
| 69 xpc_DumpEvalInJSStackFrame(JSContext* cx, uint32_t frameno, const char* text) | |
| 70 { | |
| 71 if (!cx || !text) { | |
| 72 DebugDump("%s", "invalid params passed to xpc_DumpEvalInJSStackFrame!\n"); | |
| 73 return false; | |
| 74 } | |
| 75 | |
| 76 DebugDump("js[%d]> %s\n", frameno, text); | |
| 77 | |
| 78 uint32_t num = 0; | |
| 79 | |
| 80 JSAbstractFramePtr frame = JSNullFramePtr(); | |
| 81 | |
| 82 JSBrokenFrameIterator iter(cx); | |
| 83 while (!iter.done()) { | |
| 84 if (num == frameno) { | |
| 85 frame = iter.abstractFramePtr(); | |
| 86 break; | |
| 87 } | |
| 88 ++iter; | |
| 89 num++; | |
| 90 } | |
| 91 | |
| 92 if (!frame) { | |
| 93 DebugDump("%s", "invalid frame number!\n"); | |
| 94 return false; | |
| 95 } | |
| 96 | |
| 97 JS::AutoSaveExceptionState exceptionState(cx); | |
| 98 JSErrorReporter older = JS_SetErrorReporter(cx, xpcDumpEvalErrorReporter); | |
| 99 | |
| 100 JS::RootedValue rval(cx); | |
| 101 JSString* str; | |
| 102 JSAutoByteString bytes; | |
| 103 if (frame.evaluateInStackFrame(cx, text, strlen(text), "eval", 1, &rval) && | |
| 104 nullptr != (str = ToString(cx, rval)) && | |
| 105 bytes.encodeLatin1(cx, str)) { | |
| 106 DebugDump("%s\n", bytes.ptr()); | |
| 107 } else { | |
| 108 DebugDump("%s", "eval failed!\n"); | |
| 109 } | |
| 110 | |
| 111 JS_SetErrorReporter(cx, older); | |
| 112 exceptionState.restore(); | |
| 113 return true; | |
| 114 } | |
| 115 | |
| 116 /***************************************************************************/ | |
| 117 | |
| 118 JSTrapStatus | |
| 119 xpc_DebuggerKeywordHandler(JSContext *cx, JSScript *script, jsbytecode *pc, | |
| 120 jsval *rval, void *closure) | |
| 121 { | |
| 122 static const char line[] = | |
| 123 "------------------------------------------------------------------------\n"; | |
| 124 DebugDump("%s", line); | |
| 125 DebugDump("%s", "Hit JavaScript \"debugger\" keyword. JS call stack...\n"); | |
| 126 xpc_DumpJSStack(cx, true, true, false); | |
| 127 DebugDump("%s", line); | |
| 128 return JSTRAP_CONTINUE; | |
| 129 } | |
| 130 | |
| 131 bool xpc_InstallJSDebuggerKeywordHandler(JSRuntime* rt) | |
| 132 { | |
| 133 return JS_SetDebuggerHandler(rt, xpc_DebuggerKeywordHandler, nullptr); | |
| 134 } |
