зеркало из https://github.com/mozilla/gecko-dev.git
Bug 347248: Initialize Error instance properties lazily to speed up new Error(). r=brendan
This commit is contained in:
igor.bukanov%gmail.com
Родитель
fcc8d89c9e
Коммит
3ae0efd172
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@ -106,12 +106,15 @@ const char js_constructor_str[] = "constructor";
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const char js_count_str[] = "__count__";
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const char js_each_str[] = "each";
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const char js_eval_str[] = "eval";
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const char js_fileName_str[] = "fileName";
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const char js_get_str[] = "get";
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const char js_getter_str[] = "getter";
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const char js_index_str[] = "index";
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const char js_input_str[] = "input";
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const char js_iterator_str[] = "__iterator__";
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const char js_length_str[] = "length";
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const char js_lineNumber_str[] = "lineNumber";
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const char js_message_str[] = "message";
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const char js_name_str[] = "name";
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const char js_next_str[] = "next";
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const char js_noSuchMethod_str[] = "__noSuchMethod__";
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@ -120,6 +123,7 @@ const char js_parent_str[] = "__parent__";
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const char js_proto_str[] = "__proto__";
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const char js_setter_str[] = "setter";
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const char js_set_str[] = "set";
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const char js_stack_str[] = "stack";
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const char js_toSource_str[] = "toSource";
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const char js_toString_str[] = "toString";
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const char js_toLocaleString_str[] = "toLocaleString";
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@ -313,12 +317,15 @@ js_InitPinnedAtoms(JSContext *cx, JSAtomState *state)
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FROB(countAtom, js_count_str);
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FROB(eachAtom, js_each_str);
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FROB(evalAtom, js_eval_str);
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FROB(fileNameAtom, js_fileName_str);
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FROB(getAtom, js_get_str);
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FROB(getterAtom, js_getter_str);
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FROB(indexAtom, js_index_str);
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FROB(inputAtom, js_input_str);
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FROB(iteratorAtom, js_iterator_str);
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FROB(lengthAtom, js_length_str);
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FROB(lineNumberAtom, js_lineNumber_str);
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FROB(messageAtom, js_message_str);
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FROB(nameAtom, js_name_str);
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FROB(nextAtom, js_next_str);
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FROB(noSuchMethodAtom, js_noSuchMethod_str);
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@ -326,6 +333,7 @@ js_InitPinnedAtoms(JSContext *cx, JSAtomState *state)
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FROB(protoAtom, js_proto_str);
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FROB(setAtom, js_set_str);
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FROB(setterAtom, js_setter_str);
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FROB(stackAtom, js_stack_str);
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FROB(toSourceAtom, js_toSource_str);
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FROB(toStringAtom, js_toString_str);
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FROB(toLocaleStringAtom, js_toLocaleString_str);
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@ -176,12 +176,15 @@ struct JSAtomState {
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JSAtom *eachAtom;
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JSAtom *etagoAtom;
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JSAtom *evalAtom;
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JSAtom *fileNameAtom;
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JSAtom *getAtom;
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JSAtom *getterAtom;
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JSAtom *indexAtom;
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JSAtom *inputAtom;
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JSAtom *iteratorAtom;
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JSAtom *lengthAtom;
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JSAtom *lineNumberAtom;
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JSAtom *messageAtom;
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JSAtom *nameAtom;
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JSAtom *namespaceAtom;
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JSAtom *nextAtom;
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@ -193,6 +196,7 @@ struct JSAtomState {
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JSAtom *setAtom;
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JSAtom *setterAtom;
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JSAtom *spaceAtom;
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JSAtom *stackAtom;
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JSAtom *stagoAtom;
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JSAtom *starAtom;
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JSAtom *starQualifierAtom;
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@ -269,12 +273,15 @@ extern const char js_count_str[];
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extern const char js_etago_str[];
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extern const char js_each_str[];
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extern const char js_eval_str[];
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extern const char js_fileName_str[];
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extern const char js_get_str[];
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extern const char js_getter_str[];
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extern const char js_index_str[];
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extern const char js_input_str[];
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extern const char js_iterator_str[];
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extern const char js_length_str[];
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extern const char js_lineNumber_str[];
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extern const char js_message_str[];
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extern const char js_name_str[];
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extern const char js_namespace_str[];
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extern const char js_next_str[];
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@ -289,6 +296,7 @@ extern const char js_send_str[];
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extern const char js_setter_str[];
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extern const char js_set_str[];
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extern const char js_space_str[];
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extern const char js_stack_str[];
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extern const char js_stago_str[];
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extern const char js_star_str[];
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extern const char js_starQualifier_str[];
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621
js/src/jsexn.c
621
js/src/jsexn.c
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@ -60,12 +60,6 @@
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#include "jsopcode.h"
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#include "jsscript.h"
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/* XXX consider adding rt->atomState.messageAtom */
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static char js_message_str[] = "message";
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static char js_filename_str[] = "fileName";
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static char js_lineno_str[] = "lineNumber";
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static char js_stack_str[] = "stack";
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/* Forward declarations for js_ErrorClass's initializer. */
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static JSBool
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Exception(JSContext *cx, JSObject *obj, uintN argc, jsval *argv, jsval *rval);
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@ -73,22 +67,49 @@ Exception(JSContext *cx, JSObject *obj, uintN argc, jsval *argv, jsval *rval);
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static void
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exn_finalize(JSContext *cx, JSObject *obj);
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static uint32
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exn_mark(JSContext *cx, JSObject *obj, void *arg);
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static void
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exn_finalize(JSContext *cx, JSObject *obj);
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static JSBool
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exn_enumerate(JSContext *cx, JSObject *obj);
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static JSBool
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exn_resolve(JSContext *cx, JSObject *obj, jsval id, uintN flags,
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JSObject **objp);
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JSClass js_ErrorClass = {
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js_Error_str,
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JSCLASS_HAS_PRIVATE | JSCLASS_HAS_CACHED_PROTO(JSProto_Error),
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JSCLASS_HAS_PRIVATE | JSCLASS_NEW_RESOLVE |
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JSCLASS_HAS_CACHED_PROTO(JSProto_Error),
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JS_PropertyStub, JS_PropertyStub, JS_PropertyStub, JS_PropertyStub,
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JS_EnumerateStub, JS_ResolveStub, JS_ConvertStub, exn_finalize,
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exn_enumerate, (JSResolveOp)exn_resolve, JS_ConvertStub, exn_finalize,
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NULL, NULL, NULL, Exception,
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NULL, NULL, NULL, 0
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NULL, NULL, exn_mark, NULL
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};
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/*
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* A copy of the JSErrorReport originally generated.
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*/
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typedef struct JSStackTraceElem {
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JSString *funName;
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size_t argc;
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const char *filename;
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uintN ulineno;
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} JSStackTraceElem;
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typedef struct JSExnPrivate {
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JSErrorReport *errorReport;
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/* A copy of the JSErrorReport originally generated. */
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JSErrorReport *errorReport;
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JSString *message;
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JSString *filename;
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uintN lineno;
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size_t stackDepth;
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JSStackTraceElem stackElems[1];
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} JSExnPrivate;
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static JSString *
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StackTraceToString(JSContext *cx, JSExnPrivate *priv);
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static JSErrorReport *
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CopyErrorReport(JSContext *cx, JSErrorReport *report)
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{
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@ -207,64 +228,298 @@ CopyErrorReport(JSContext *cx, JSErrorReport *report)
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return copy;
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}
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/*
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* Copy everything interesting about an error into allocated memory.
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*/
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static JSExnPrivate *
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exn_newPrivate(JSContext *cx, JSErrorReport *report)
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static jsval *
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GetStackTraceValueBuffer(JSExnPrivate *priv)
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{
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JSExnPrivate *newPrivate;
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/*
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* We use extra memory after JSExnPrivateInfo.stackElems to store jsvals
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* that helps to produce more informative stack traces. The following
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* assert allows us to assume that no gap after stackElems is necessary to
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* align the buffer properly.
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*/
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JS_STATIC_ASSERT(sizeof(JSStackTraceElem) % sizeof(jsval) == 0);
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newPrivate = (JSExnPrivate *)JS_malloc(cx, sizeof (JSExnPrivate));
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if (!newPrivate)
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return NULL;
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newPrivate->errorReport = CopyErrorReport(cx, report);
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if (!newPrivate->errorReport) {
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JS_free(cx, newPrivate);
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return NULL;
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return (jsval *)(priv->stackElems + priv->stackDepth);
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}
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static JSBool
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InitExnPrivate(JSContext *cx, JSObject *exnObject, JSString *message,
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JSString *filename, uintN lineno, JSErrorReport *report)
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{
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JSCheckAccessOp checkAccess;
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JSErrorReporter older;
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JSExceptionState *state;
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jsval callerid, v;
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JSStackFrame *fp, *fpstop;
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size_t stackDepth, valueCount, size;
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JSBool overflow;
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JSExnPrivate *priv;
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JSStackTraceElem *elem;
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jsval *values;
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JS_ASSERT(OBJ_GET_CLASS(cx, exnObject) == &js_ErrorClass);
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/*
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* Prepare stack trace data.
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*
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* Set aside any error reporter for cx and save its exception state
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* so we can suppress any checkAccess failures. Such failures should stop
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* the backtrace procedure, not result in a failure of this constructor.
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*/
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checkAccess = cx->runtime->checkObjectAccess;
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older = JS_SetErrorReporter(cx, NULL);
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state = JS_SaveExceptionState(cx);
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callerid = ATOM_KEY(cx->runtime->atomState.callerAtom);
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stackDepth = 0;
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valueCount = 0;
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for (fp = cx->fp; fp; fp = fp->down) {
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if (fp->fun && fp->argv) {
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if (checkAccess) {
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v = fp->argv[-2];
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if (!JSVAL_IS_PRIMITIVE(v) &&
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!checkAccess(cx, JSVAL_TO_OBJECT(v), callerid,
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JSACC_READ, &v /* ignored */)) {
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break;
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}
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}
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valueCount += fp->argc;
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}
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++stackDepth;
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}
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return newPrivate;
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JS_RestoreExceptionState(cx, state);
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JS_SetErrorReporter(cx, older);
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fpstop = fp;
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size = offsetof(JSExnPrivate, stackElems);
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overflow = (stackDepth > ((size_t)-1 - size) / sizeof(JSStackTraceElem));
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size += stackDepth * sizeof(JSStackTraceElem);
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overflow |= (valueCount > ((size_t)-1 - size) / sizeof(jsval));
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size += valueCount * sizeof(jsval);
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if (overflow) {
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JS_ReportOutOfMemory(cx);
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return JS_FALSE;
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}
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priv = (JSExnPrivate *)JS_malloc(cx, size);
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if (!priv)
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return JS_FALSE;
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/*
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* We initialize errorReport with a copy of report after setting the
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* private slot, to prevent GC accessing a junk value we clear the field
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* here.
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*/
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priv->errorReport = NULL;
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priv->message = message;
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priv->filename = filename;
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priv->lineno = lineno;
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priv->stackDepth = stackDepth;
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values = GetStackTraceValueBuffer(priv);
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elem = priv->stackElems;
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for (fp = cx->fp; fp != fpstop; fp = fp->down) {
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if (!fp->fun) {
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elem->funName = NULL;
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elem->argc = 0;
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} else {
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elem->funName = fp->fun->atom
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? ATOM_TO_STRING(fp->fun->atom)
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: cx->runtime->emptyString;
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elem->argc = fp->argc;
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memcpy(values, fp->argv, fp->argc * sizeof(jsval));
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values += fp->argc;
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}
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elem->ulineno = 0;
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elem->filename = NULL;
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if (fp->script) {
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elem->filename = fp->script->filename;
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if (fp->pc)
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elem->ulineno = js_PCToLineNumber(cx, fp->script, fp->pc);
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}
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++elem;
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}
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JS_ASSERT(priv->stackElems + stackDepth == elem);
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JS_ASSERT(GetStackTraceValueBuffer(priv) + valueCount == values);
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OBJ_SET_SLOT(cx, exnObject, JSSLOT_PRIVATE, PRIVATE_TO_JSVAL(priv));
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if (report) {
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/*
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* Construct a new copy of the error report struct. We can't use the
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* error report struct that was passed in, because it's allocated on
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* the stack, and also because it may point to transient data in the
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* JSTokenStream.
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*/
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priv->errorReport = CopyErrorReport(cx, report);
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if (!priv->errorReport) {
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/* The finalizer realeases priv since it is in the private slot. */
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return JS_FALSE;
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}
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}
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return JS_TRUE;
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}
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static JSExnPrivate *
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GetExnPrivate(JSContext *cx, JSObject *obj)
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{
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jsval privateValue;
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JSExnPrivate *priv;
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JS_ASSERT(OBJ_GET_CLASS(cx, obj) == &js_ErrorClass);
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privateValue = OBJ_GET_SLOT(cx, obj, JSSLOT_PRIVATE);
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if (JSVAL_IS_VOID(privateValue))
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return NULL;
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priv = (JSExnPrivate *)JSVAL_TO_PRIVATE(privateValue);
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JS_ASSERT(priv);
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return priv;
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}
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static uint32
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exn_mark(JSContext *cx, JSObject *obj, void *arg)
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{
|
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JSExnPrivate *priv;
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JSStackTraceElem *elem;
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size_t vcount, i;
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jsval *vp, v;
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|
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priv = GetExnPrivate(cx, obj);
|
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if (priv) {
|
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GC_MARK(cx, priv->message, "exception message");
|
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GC_MARK(cx, priv->filename, "exception filename");
|
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elem = priv->stackElems;
|
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for (vcount = i = 0; i != priv->stackDepth; ++i, ++elem) {
|
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if (elem->funName)
|
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GC_MARK(cx, elem->funName, "stack trace function name");
|
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if (elem->filename)
|
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js_MarkScriptFilename(elem->filename);
|
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vcount += elem->argc;
|
||||
}
|
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vp = GetStackTraceValueBuffer(priv);
|
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for (i = 0; i != vcount; ++i, ++vp) {
|
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v = *vp;
|
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if (JSVAL_IS_GCTHING(v))
|
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GC_MARK(cx, JSVAL_TO_GCTHING(v), "stack trace argument");
|
||||
}
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
static void
|
||||
exn_finalize(JSContext *cx, JSObject *obj)
|
||||
{
|
||||
JSExnPrivate *privateData;
|
||||
jsval privateValue;
|
||||
JSExnPrivate *priv;
|
||||
|
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privateValue = OBJ_GET_SLOT(cx, obj, JSSLOT_PRIVATE);
|
||||
priv = GetExnPrivate(cx, obj);
|
||||
if (priv) {
|
||||
if (priv->errorReport)
|
||||
JS_free(cx, priv->errorReport);
|
||||
JS_free(cx, priv);
|
||||
}
|
||||
}
|
||||
|
||||
if (!JSVAL_IS_VOID(privateValue)) {
|
||||
privateData = (JSExnPrivate*) JSVAL_TO_PRIVATE(privateValue);
|
||||
if (privateData) {
|
||||
if (privateData->errorReport)
|
||||
JS_free(cx, privateData->errorReport);
|
||||
JS_free(cx, privateData);
|
||||
static JSBool
|
||||
exn_enumerate(JSContext *cx, JSObject *obj)
|
||||
{
|
||||
JSAtomState *atomState;
|
||||
uintN i;
|
||||
JSAtom *atom;
|
||||
JSObject *pobj;
|
||||
JSProperty *prop;
|
||||
|
||||
JS_STATIC_ASSERT(sizeof(JSAtomState) <= (size_t)(uint16)-1);
|
||||
static const uint16 offsets[] = {
|
||||
(uint16)offsetof(JSAtomState, messageAtom),
|
||||
(uint16)offsetof(JSAtomState, fileNameAtom),
|
||||
(uint16)offsetof(JSAtomState, lineNumberAtom),
|
||||
(uint16)offsetof(JSAtomState, stackAtom),
|
||||
};
|
||||
|
||||
atomState = &cx->runtime->atomState;
|
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for (i = 0; i != JS_ARRAY_LENGTH(offsets); ++i) {
|
||||
atom = *(JSAtom **)((uint8 *)atomState + offsets[i]);
|
||||
if (!js_LookupProperty(cx, obj, ATOM_TO_JSID(atom), &pobj, &prop))
|
||||
return JS_FALSE;
|
||||
if (prop)
|
||||
OBJ_DROP_PROPERTY(cx, pobj, prop);
|
||||
}
|
||||
return JS_TRUE;
|
||||
}
|
||||
|
||||
static JSBool
|
||||
exn_resolve(JSContext *cx, JSObject *obj, jsval id, uintN flags,
|
||||
JSObject **objp)
|
||||
{
|
||||
JSExnPrivate *priv;
|
||||
JSString *str;
|
||||
JSAtom *atom;
|
||||
JSString *stack;
|
||||
const char *prop;
|
||||
jsval v;
|
||||
|
||||
*objp = NULL;
|
||||
priv = GetExnPrivate(cx, obj);
|
||||
if (priv && JSVAL_IS_STRING(id)) {
|
||||
str = JSVAL_TO_STRING(id);
|
||||
|
||||
atom = cx->runtime->atomState.messageAtom;
|
||||
if (str == ATOM_TO_STRING(atom)) {
|
||||
prop = js_message_str;
|
||||
v = STRING_TO_JSVAL(priv->message);
|
||||
goto define;
|
||||
}
|
||||
|
||||
atom = cx->runtime->atomState.fileNameAtom;
|
||||
if (str == ATOM_TO_STRING(atom)) {
|
||||
prop = js_fileName_str;
|
||||
v = STRING_TO_JSVAL(priv->filename);
|
||||
goto define;
|
||||
}
|
||||
|
||||
atom = cx->runtime->atomState.lineNumberAtom;
|
||||
if (str == ATOM_TO_STRING(atom)) {
|
||||
prop = js_lineNumber_str;
|
||||
v = INT_TO_JSVAL(priv->lineno);
|
||||
goto define;
|
||||
}
|
||||
|
||||
atom = cx->runtime->atomState.stackAtom;
|
||||
if (str == ATOM_TO_STRING(atom)) {
|
||||
stack = StackTraceToString(cx, priv);
|
||||
if (!stack)
|
||||
return JS_FALSE;
|
||||
|
||||
/* Allow to GC all things that were used to build stack trace. */
|
||||
priv->stackDepth = 0;
|
||||
prop = js_stack_str;
|
||||
v = STRING_TO_JSVAL(stack);
|
||||
goto define;
|
||||
}
|
||||
}
|
||||
return JS_TRUE;
|
||||
|
||||
define:
|
||||
if (!JS_DefineProperty(cx, obj, prop, v, NULL, NULL, JSPROP_ENUMERATE))
|
||||
return JS_FALSE;
|
||||
*objp = obj;
|
||||
return JS_TRUE;
|
||||
}
|
||||
|
||||
JSErrorReport *
|
||||
js_ErrorFromException(JSContext *cx, jsval exn)
|
||||
{
|
||||
JSObject *obj;
|
||||
JSExnPrivate *privateData;
|
||||
jsval privateValue;
|
||||
JSExnPrivate *priv;
|
||||
|
||||
if (JSVAL_IS_PRIMITIVE(exn))
|
||||
return NULL;
|
||||
obj = JSVAL_TO_OBJECT(exn);
|
||||
if (OBJ_GET_CLASS(cx, obj) != &js_ErrorClass)
|
||||
return NULL;
|
||||
privateValue = OBJ_GET_SLOT(cx, obj, JSSLOT_PRIVATE);
|
||||
if (JSVAL_IS_VOID(privateValue))
|
||||
priv = GetExnPrivate(cx, obj);
|
||||
if (!priv)
|
||||
return NULL;
|
||||
privateData = (JSExnPrivate*) JSVAL_TO_PRIVATE(privateValue);
|
||||
if (!privateData)
|
||||
return NULL;
|
||||
|
||||
JS_ASSERT(privateData->errorReport);
|
||||
return privateData->errorReport;
|
||||
return priv->errorReport;
|
||||
}
|
||||
|
||||
struct JSExnSpec {
|
||||
|
|
@ -310,65 +565,55 @@ static struct JSExnSpec exceptions[] = {
|
|||
{0, NULL, JSProto_Null, NULL}
|
||||
};
|
||||
|
||||
static JSBool
|
||||
InitExceptionObject(JSContext *cx, JSObject *obj, JSString *message,
|
||||
JSString *filename, uintN lineno)
|
||||
static JSString *
|
||||
ValueToShortSource(JSContext *cx, jsval v)
|
||||
{
|
||||
JSString *str;
|
||||
|
||||
/* Avoid toSource bloat and fallibility for object types. */
|
||||
if (JSVAL_IS_PRIMITIVE(v)) {
|
||||
str = js_ValueToSource(cx, v);
|
||||
} else if (VALUE_IS_FUNCTION(cx, v)) {
|
||||
/*
|
||||
* XXX Avoid function decompilation bloat for now.
|
||||
*/
|
||||
str = JS_GetFunctionId(JS_ValueToFunction(cx, v));
|
||||
if (!str && !(str = js_ValueToSource(cx, v))) {
|
||||
/*
|
||||
* Continue to soldier on if the function couldn't be
|
||||
* converted into a string.
|
||||
*/
|
||||
JS_ClearPendingException(cx);
|
||||
str = JS_NewStringCopyZ(cx, "[unknown function]");
|
||||
}
|
||||
} else {
|
||||
/*
|
||||
* XXX Avoid toString on objects, it takes too long and uses too much
|
||||
* memory, for too many classes (see Mozilla bug 166743).
|
||||
*/
|
||||
char buf[100];
|
||||
JS_snprintf(buf, sizeof buf, "[object %s]",
|
||||
OBJ_GET_CLASS(cx, JSVAL_TO_OBJECT(v))->name);
|
||||
str = JS_NewStringCopyZ(cx, buf);
|
||||
}
|
||||
return str;
|
||||
}
|
||||
|
||||
static JSString *
|
||||
StackTraceToString(JSContext *cx, JSExnPrivate *priv)
|
||||
{
|
||||
JSCheckAccessOp checkAccess;
|
||||
JSErrorReporter older;
|
||||
JSExceptionState *state;
|
||||
jschar *stackbuf;
|
||||
size_t stacklen, stackmax;
|
||||
JSStackFrame *fp;
|
||||
jsval callerid, v;
|
||||
JSBool ok;
|
||||
JSString *argsrc, *stack;
|
||||
uintN i, ulineno;
|
||||
JSStackTraceElem *elem, *endElem;
|
||||
jsval *values;
|
||||
size_t i;
|
||||
JSString *str;
|
||||
const char *cp;
|
||||
char ulnbuf[11];
|
||||
|
||||
if (!JS_DefineProperty(cx, obj, js_message_str, STRING_TO_JSVAL(message),
|
||||
NULL, NULL, JSPROP_ENUMERATE)) {
|
||||
return JS_FALSE;
|
||||
}
|
||||
|
||||
if (!JS_DefineProperty(cx, obj, js_filename_str,
|
||||
STRING_TO_JSVAL(filename),
|
||||
NULL, NULL, JSPROP_ENUMERATE)) {
|
||||
return JS_FALSE;
|
||||
}
|
||||
|
||||
if (!JS_DefineProperty(cx, obj, js_lineno_str,
|
||||
INT_TO_JSVAL(lineno),
|
||||
NULL, NULL, JSPROP_ENUMERATE)) {
|
||||
return JS_FALSE;
|
||||
}
|
||||
|
||||
/*
|
||||
* Set the 'stack' property.
|
||||
*
|
||||
* First, set aside any error reporter for cx and save its exception state
|
||||
* so we can suppress any checkAccess failures. Such failures should stop
|
||||
* the backtrace procedure, not result in a failure of this constructor.
|
||||
*/
|
||||
checkAccess = cx->runtime->checkObjectAccess;
|
||||
older = JS_SetErrorReporter(cx, NULL);
|
||||
state = JS_SaveExceptionState(cx);
|
||||
|
||||
callerid = ATOM_KEY(cx->runtime->atomState.callerAtom);
|
||||
|
||||
/*
|
||||
* Prepare to allocate a jschar buffer at stackbuf, where stacklen indexes
|
||||
* the next free jschar slot, and with room for at most stackmax non-null
|
||||
* jschars. If stackbuf is non-null, it always contains an extra slot for
|
||||
* the null terminator we'll store at the end, as a backstop.
|
||||
*
|
||||
* All early returns must goto done after this point, till the after-loop
|
||||
* cleanup code has run!
|
||||
*/
|
||||
/* After this point, failing control flow must goto bad. */
|
||||
stackbuf = NULL;
|
||||
stacklen = stackmax = 0;
|
||||
ok = JS_TRUE;
|
||||
|
||||
/* Limit the stackbuf length to a reasonable value to avoid overflow checks. */
|
||||
#define STACK_LENGTH_LIMIT JS_BIT(20)
|
||||
|
|
@ -381,10 +626,8 @@ InitExceptionObject(JSContext *cx, JSObject *obj, JSString *message,
|
|||
goto done; \
|
||||
stackmax = stackmax ? 2 * stackmax : 64; \
|
||||
ptr_ = JS_realloc(cx, stackbuf, (stackmax+1) * sizeof(jschar)); \
|
||||
if (!ptr_) { \
|
||||
ok = JS_FALSE; \
|
||||
goto done; \
|
||||
} \
|
||||
if (!ptr_) \
|
||||
goto bad; \
|
||||
stackbuf = ptr_; \
|
||||
} \
|
||||
stackbuf[stacklen++] = (c); \
|
||||
|
|
@ -402,132 +645,70 @@ InitExceptionObject(JSContext *cx, JSObject *obj, JSString *message,
|
|||
} \
|
||||
stackmax = JS_BIT(JS_CeilingLog2(stacklen + length_)); \
|
||||
ptr_ = JS_realloc(cx, stackbuf, (stackmax+1) * sizeof(jschar)); \
|
||||
if (!ptr_) { \
|
||||
ok = JS_FALSE; \
|
||||
goto done; \
|
||||
} \
|
||||
if (!ptr_) \
|
||||
goto bad; \
|
||||
stackbuf = ptr_; \
|
||||
} \
|
||||
js_strncpy(stackbuf + stacklen, JSSTRING_CHARS(str_), length_); \
|
||||
stacklen += length_; \
|
||||
JS_END_MACRO
|
||||
|
||||
for (fp = cx->fp; fp; fp = fp->down) {
|
||||
if (checkAccess) {
|
||||
v = (fp->fun && fp->argv) ? fp->argv[-2] : JSVAL_NULL;
|
||||
if (!JSVAL_IS_PRIMITIVE(v)) {
|
||||
ok = checkAccess(cx, JSVAL_TO_OBJECT(fp->argv[-2]), callerid,
|
||||
JSACC_READ, &v /* ignored */);
|
||||
if (!ok) {
|
||||
ok = JS_TRUE;
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
if (fp->fun) {
|
||||
if (fp->fun->atom)
|
||||
APPEND_STRING_TO_STACK(ATOM_TO_STRING(fp->fun->atom));
|
||||
|
||||
values = GetStackTraceValueBuffer(priv);
|
||||
elem = priv->stackElems;
|
||||
for (endElem = elem + priv->stackDepth; elem != endElem; elem++) {
|
||||
if (elem->funName) {
|
||||
APPEND_STRING_TO_STACK(elem->funName);
|
||||
APPEND_CHAR_TO_STACK('(');
|
||||
for (i = 0; i < fp->argc; i++) {
|
||||
/* Avoid toSource bloat and fallibility for object types. */
|
||||
v = fp->argv[i];
|
||||
if (JSVAL_IS_PRIMITIVE(v)) {
|
||||
argsrc = js_ValueToSource(cx, v);
|
||||
} else if (VALUE_IS_FUNCTION(cx, v)) {
|
||||
/* XXX Avoid function decompilation bloat for now. */
|
||||
argsrc = JS_GetFunctionId(JS_ValueToFunction(cx, v));
|
||||
if (!argsrc && !(argsrc = js_ValueToSource(cx, v))) {
|
||||
/*
|
||||
* Continue to soldier on if the function couldn't be
|
||||
* converted into a string.
|
||||
*/
|
||||
JS_ClearPendingException(cx);
|
||||
argsrc = JS_NewStringCopyZ(cx, "[unknown function]");
|
||||
if (!argsrc) {
|
||||
ok = JS_FALSE;
|
||||
break;
|
||||
}
|
||||
}
|
||||
} else {
|
||||
/* XXX Avoid toString on objects, it takes too long and
|
||||
uses too much memory, for too many classes (see
|
||||
Mozilla bug 166743). */
|
||||
char buf[100];
|
||||
JS_snprintf(buf, sizeof buf, "[object %s]",
|
||||
OBJ_GET_CLASS(cx, JSVAL_TO_OBJECT(v))->name);
|
||||
argsrc = JS_NewStringCopyZ(cx, buf);
|
||||
}
|
||||
if (!argsrc) {
|
||||
ok = JS_FALSE;
|
||||
goto done;
|
||||
}
|
||||
for (i = 0; i != elem->argc; i++, values++) {
|
||||
if (i > 0)
|
||||
APPEND_CHAR_TO_STACK(',');
|
||||
APPEND_STRING_TO_STACK(argsrc);
|
||||
str = ValueToShortSource(cx, *values);
|
||||
if (!str)
|
||||
goto bad;
|
||||
APPEND_STRING_TO_STACK(str);
|
||||
}
|
||||
APPEND_CHAR_TO_STACK(')');
|
||||
}
|
||||
|
||||
APPEND_CHAR_TO_STACK('@');
|
||||
if (fp->script && fp->script->filename) {
|
||||
for (cp = fp->script->filename; *cp; cp++)
|
||||
if (elem->filename) {
|
||||
for (cp = elem->filename; *cp; cp++)
|
||||
APPEND_CHAR_TO_STACK(*cp);
|
||||
}
|
||||
APPEND_CHAR_TO_STACK(':');
|
||||
if (fp->script && fp->pc) {
|
||||
ulineno = js_PCToLineNumber(cx, fp->script, fp->pc);
|
||||
JS_snprintf(ulnbuf, sizeof ulnbuf, "%u", ulineno);
|
||||
for (cp = ulnbuf; *cp; cp++)
|
||||
APPEND_CHAR_TO_STACK(*cp);
|
||||
} else {
|
||||
APPEND_CHAR_TO_STACK('0');
|
||||
}
|
||||
JS_snprintf(ulnbuf, sizeof ulnbuf, "%u", elem->ulineno);
|
||||
for (cp = ulnbuf; *cp; cp++)
|
||||
APPEND_CHAR_TO_STACK(*cp);
|
||||
APPEND_CHAR_TO_STACK('\n');
|
||||
}
|
||||
|
||||
#undef APPEND_CHAR_TO_STACK
|
||||
#undef APPEND_STRING_TO_STACK
|
||||
#undef STACK_LENGTH_LIMIT
|
||||
|
||||
done:
|
||||
if (ok)
|
||||
JS_RestoreExceptionState(cx, state);
|
||||
else
|
||||
JS_DropExceptionState(cx, state);
|
||||
JS_SetErrorReporter(cx, older);
|
||||
done:
|
||||
if (stacklen == 0) {
|
||||
JS_ASSERT(!stackbuf);
|
||||
return cx->runtime->emptyString;
|
||||
}
|
||||
if (stacklen < stackmax) {
|
||||
/*
|
||||
* Realloc can fail when shrinking on some FreeBSD versions, so
|
||||
* don't use JS_realloc here; simply let the oversized allocation
|
||||
* be owned by the string in that rare case.
|
||||
*/
|
||||
void *shrunk = JS_realloc(cx, stackbuf, (stacklen+1) * sizeof(jschar));
|
||||
if (shrunk)
|
||||
stackbuf = shrunk;
|
||||
}
|
||||
|
||||
if (!ok) {
|
||||
stackbuf[stacklen] = 0;
|
||||
str = js_NewString(cx, stackbuf, stacklen, 0);
|
||||
if (str)
|
||||
return str;
|
||||
|
||||
bad:
|
||||
if (stackbuf)
|
||||
JS_free(cx, stackbuf);
|
||||
return JS_FALSE;
|
||||
}
|
||||
|
||||
if (!stackbuf) {
|
||||
stack = cx->runtime->emptyString;
|
||||
} else {
|
||||
/* NB: if stackbuf was allocated, it has room for the terminator. */
|
||||
JS_ASSERT(stacklen <= stackmax);
|
||||
if (stacklen < stackmax) {
|
||||
/*
|
||||
* Realloc can fail when shrinking on some FreeBSD versions, so
|
||||
* don't use JS_realloc here; simply let the oversized allocation
|
||||
* be owned by the string in that rare case.
|
||||
*/
|
||||
void *shrunk = realloc(stackbuf, (stacklen+1) * sizeof(jschar));
|
||||
if (shrunk)
|
||||
stackbuf = shrunk;
|
||||
}
|
||||
stackbuf[stacklen] = 0;
|
||||
stack = js_NewString(cx, stackbuf, stacklen, 0);
|
||||
if (!stack) {
|
||||
JS_free(cx, stackbuf);
|
||||
return JS_FALSE;
|
||||
}
|
||||
}
|
||||
return JS_DefineProperty(cx, obj, js_stack_str,
|
||||
STRING_TO_JSVAL(stack),
|
||||
NULL, NULL, JSPROP_ENUMERATE);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
/* XXXbe Consolidate the ugly truth that we don't treat filename as UTF-8
|
||||
|
|
@ -630,9 +811,10 @@ Exception(JSContext *cx, JSObject *obj, uintN argc, jsval *argv, jsval *rval)
|
|||
lineno = (fp && fp->pc) ? js_PCToLineNumber(cx, fp->script, fp->pc) : 0;
|
||||
}
|
||||
|
||||
ok = InitExceptionObject(cx, obj, message, filename, lineno);
|
||||
ok = (OBJ_GET_CLASS(cx, obj) != &js_ErrorClass) ||
|
||||
InitExnPrivate(cx, obj, message, filename, lineno, NULL);
|
||||
|
||||
out:
|
||||
out:
|
||||
cx->creatingException = JS_FALSE;
|
||||
return ok;
|
||||
}
|
||||
|
|
@ -726,13 +908,13 @@ exn_toSource(JSContext *cx, JSObject *obj, uintN argc, jsval *argv, jsval *rval)
|
|||
}
|
||||
vp[0] = STRING_TO_JSVAL(message);
|
||||
|
||||
if (!JS_GetProperty(cx, obj, js_filename_str, &vp[1]) ||
|
||||
if (!JS_GetProperty(cx, obj, js_fileName_str, &vp[1]) ||
|
||||
!(filename = js_ValueToSource(cx, vp[1]))) {
|
||||
return JS_FALSE;
|
||||
}
|
||||
vp[1] = STRING_TO_JSVAL(filename);
|
||||
|
||||
if (!JS_GetProperty(cx, obj, js_lineno_str, &vp[2]) ||
|
||||
if (!JS_GetProperty(cx, obj, js_lineNumber_str, &vp[2]) ||
|
||||
!js_ValueToECMAUint32 (cx, vp[2], &lineno)) {
|
||||
return JS_FALSE;
|
||||
}
|
||||
|
|
@ -918,12 +1100,12 @@ js_InitExceptionClasses(JSContext *cx, JSObject *obj)
|
|||
NULL, NULL, JSPROP_ENUMERATE)) {
|
||||
return NULL;
|
||||
}
|
||||
if (!JS_DefineProperty(cx, protos[0], js_filename_str,
|
||||
if (!JS_DefineProperty(cx, protos[0], js_fileName_str,
|
||||
STRING_TO_JSVAL(cx->runtime->emptyString),
|
||||
NULL, NULL, JSPROP_ENUMERATE)) {
|
||||
return NULL;
|
||||
}
|
||||
if (!JS_DefineProperty(cx, protos[0], js_lineno_str,
|
||||
if (!JS_DefineProperty(cx, protos[0], js_lineNumber_str,
|
||||
INT_TO_JSVAL(0),
|
||||
NULL, NULL, JSPROP_ENUMERATE)) {
|
||||
return NULL;
|
||||
|
|
@ -972,7 +1154,6 @@ js_ErrorToException(JSContext *cx, const char *message, JSErrorReport *reportp)
|
|||
JSObject *errProto, *errObject;
|
||||
JSString *messageStr, *filenameStr;
|
||||
uintN lineno;
|
||||
JSExnPrivate *privateData;
|
||||
const JSErrorFormatString *errorString;
|
||||
|
||||
/*
|
||||
|
|
@ -1057,23 +1238,11 @@ js_ErrorToException(JSContext *cx, const char *message, JSErrorReport *reportp)
|
|||
}
|
||||
lineno = reportp->lineno;
|
||||
|
||||
ok = InitExceptionObject(cx, errObject, messageStr, filenameStr, lineno);
|
||||
ok = InitExnPrivate(cx, errObject, messageStr, filenameStr, lineno,
|
||||
reportp);
|
||||
if (!ok)
|
||||
goto out;
|
||||
|
||||
/*
|
||||
* Construct a new copy of the error report struct, and store it in the
|
||||
* exception object's private data. We can't use the error report struct
|
||||
* that was passed in, because it's stack-allocated, and also because it
|
||||
* may point to transient data in the JSTokenStream.
|
||||
*/
|
||||
privateData = exn_newPrivate(cx, reportp);
|
||||
if (!privateData) {
|
||||
ok = JS_FALSE;
|
||||
goto out;
|
||||
}
|
||||
OBJ_SET_SLOT(cx, errObject, JSSLOT_PRIVATE, PRIVATE_TO_JSVAL(privateData));
|
||||
|
||||
/* Flag the error report passed in to indicate an exception was raised. */
|
||||
reportp->flags |= JSREPORT_EXCEPTION;
|
||||
|
||||
|
|
@ -1147,7 +1316,7 @@ js_ReportUncaughtException(JSContext *cx)
|
|||
if (JSVAL_IS_STRING(vp[2]))
|
||||
bytes = JS_GetStringBytes(JSVAL_TO_STRING(vp[2]));
|
||||
|
||||
ok = JS_GetProperty(cx, exnObject, js_filename_str, &vp[3]);
|
||||
ok = JS_GetProperty(cx, exnObject, js_fileName_str, &vp[3]);
|
||||
if (!ok)
|
||||
goto out;
|
||||
str = js_ValueToString(cx, vp[3]);
|
||||
|
|
@ -1157,7 +1326,7 @@ js_ReportUncaughtException(JSContext *cx)
|
|||
}
|
||||
filename = StringToFilename(cx, str);
|
||||
|
||||
ok = JS_GetProperty(cx, exnObject, js_lineno_str, &vp[4]);
|
||||
ok = JS_GetProperty(cx, exnObject, js_lineNumber_str, &vp[4]);
|
||||
if (!ok)
|
||||
goto out;
|
||||
ok = js_ValueToECMAUint32 (cx, vp[4], &lineno);
|
||||
|
|
|
|||
Загрузка…
Ссылка в новой задаче