1303 lines
37 KiB
C++
1303 lines
37 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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/*
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* JS execution context.
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*/
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#include "jscntxtinlines.h"
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#include "mozilla/ArrayUtils.h"
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#include "mozilla/DebugOnly.h"
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#include "mozilla/MemoryReporting.h"
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#include "mozilla/Sprintf.h"
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#include <ctype.h>
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#include <stdarg.h>
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#include <string.h>
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#ifdef ANDROID
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# include <android/log.h>
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# include <fstream>
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# include <string>
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#endif // ANDROID
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#include "jsatom.h"
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#include "jscompartment.h"
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#include "jsexn.h"
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#include "jsfun.h"
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#include "jsgc.h"
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#include "jsiter.h"
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#include "jsobj.h"
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#include "jsopcode.h"
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#include "jsprf.h"
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#include "jspubtd.h"
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#include "jsscript.h"
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#include "jsstr.h"
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#include "jstypes.h"
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#include "gc/Marking.h"
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#include "jit/Ion.h"
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#include "js/CharacterEncoding.h"
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#include "vm/HelperThreads.h"
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#include "vm/Shape.h"
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#include "jsobjinlines.h"
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#include "jsscriptinlines.h"
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#include "vm/Stack-inl.h"
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using namespace js;
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using namespace js::gc;
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using mozilla::DebugOnly;
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using mozilla::PodArrayZero;
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using mozilla::PointerRangeSize;
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bool
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js::AutoCycleDetector::init()
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{
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AutoCycleDetector::Set& set = cx->cycleDetectorSet;
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hashsetAddPointer = set.lookupForAdd(obj);
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if (!hashsetAddPointer) {
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if (!set.add(hashsetAddPointer, obj)) {
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ReportOutOfMemory(cx);
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return false;
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}
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cyclic = false;
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hashsetGenerationAtInit = set.generation();
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}
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return true;
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}
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js::AutoCycleDetector::~AutoCycleDetector()
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{
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if (!cyclic) {
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if (hashsetGenerationAtInit == cx->cycleDetectorSet.generation())
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cx->cycleDetectorSet.remove(hashsetAddPointer);
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else
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cx->cycleDetectorSet.remove(obj);
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}
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}
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void
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js::TraceCycleDetectionSet(JSTracer* trc, AutoCycleDetector::Set& set)
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{
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for (AutoCycleDetector::Set::Enum e(set); !e.empty(); e.popFront())
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TraceRoot(trc, &e.mutableFront(), "cycle detector table entry");
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}
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bool
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JSContext::init(uint32_t maxBytes, uint32_t maxNurseryBytes)
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{
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if (!JSRuntime::init(maxBytes, maxNurseryBytes))
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return false;
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if (!caches.init())
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return false;
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return true;
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}
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JSContext*
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js::NewContext(uint32_t maxBytes, uint32_t maxNurseryBytes, JSRuntime* parentRuntime)
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{
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JSContext* cx = js_new<JSContext>(parentRuntime);
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if (!cx)
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return nullptr;
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if (!cx->init(maxBytes, maxNurseryBytes)) {
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js_delete(cx);
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return nullptr;
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}
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return cx;
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}
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void
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js::DestroyContext(JSContext* cx)
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{
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JS_AbortIfWrongThread(cx);
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if (cx->outstandingRequests != 0)
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MOZ_CRASH("Attempted to destroy a context while it is in a request.");
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cx->roots.checkNoGCRooters();
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/*
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* Dump remaining type inference results while we still have a context.
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* This printing depends on atoms still existing.
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*/
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for (CompartmentsIter c(cx, SkipAtoms); !c.done(); c.next())
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PrintTypes(cx, c, false);
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js_delete_poison(cx);
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}
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void
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RootLists::checkNoGCRooters() {
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#ifdef DEBUG
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for (auto const& stackRootPtr : stackRoots_)
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MOZ_ASSERT(stackRootPtr == nullptr);
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#endif
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}
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bool
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AutoResolving::alreadyStartedSlow() const
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{
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MOZ_ASSERT(link);
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AutoResolving* cursor = link;
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do {
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MOZ_ASSERT(this != cursor);
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if (object.get() == cursor->object && id.get() == cursor->id && kind == cursor->kind)
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return true;
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} while (!!(cursor = cursor->link));
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return false;
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}
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static void
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ReportError(JSContext* cx, JSErrorReport* reportp, JSErrorCallback callback,
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void* userRef)
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{
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/*
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* Check the error report, and set a JavaScript-catchable exception
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* if the error is defined to have an associated exception. If an
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* exception is thrown, then the JSREPORT_EXCEPTION flag will be set
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* on the error report, and exception-aware hosts should ignore it.
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*/
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MOZ_ASSERT(reportp);
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if ((!callback || callback == GetErrorMessage) &&
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reportp->errorNumber == JSMSG_UNCAUGHT_EXCEPTION)
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{
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reportp->flags |= JSREPORT_EXCEPTION;
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}
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if (JSREPORT_IS_WARNING(reportp->flags)) {
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CallWarningReporter(cx, reportp);
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return;
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}
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ErrorToException(cx, reportp, callback, userRef);
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}
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/*
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* The given JSErrorReport object have been zeroed and must not outlive
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* cx->fp() (otherwise owned fields may become invalid).
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*/
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static void
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PopulateReportBlame(JSContext* cx, JSErrorReport* report)
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{
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JSCompartment* compartment = cx->compartment();
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if (!compartment)
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return;
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/*
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* Walk stack until we find a frame that is associated with a non-builtin
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* rather than a builtin frame and which we're allowed to know about.
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*/
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NonBuiltinFrameIter iter(cx, compartment->principals());
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if (iter.done())
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return;
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report->filename = iter.filename();
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report->lineno = iter.computeLine(&report->column);
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// XXX: Make the column 1-based as in other browsers, instead of 0-based
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// which is how SpiderMonkey stores it internally. This will be
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// unnecessary once bug 1144340 is fixed.
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report->column++;
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report->isMuted = iter.mutedErrors();
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}
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/*
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* Since memory has been exhausted, avoid the normal error-handling path which
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* allocates an error object, report and callstack. If code is running, simply
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* throw the static atom "out of memory". If code is not running, call the
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* error reporter directly.
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*
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* Furthermore, callers of ReportOutOfMemory (viz., malloc) assume a GC does
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* not occur, so GC must be avoided or suppressed.
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*/
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JS_FRIEND_API(void)
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js::ReportOutOfMemory(ExclusiveContext* cxArg)
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{
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#ifdef JS_MORE_DETERMINISTIC
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/*
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* OOMs are non-deterministic, especially across different execution modes
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* (e.g. interpreter vs JIT). In more-deterministic builds, print to stderr
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* so that the fuzzers can detect this.
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*/
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fprintf(stderr, "ReportOutOfMemory called\n");
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#endif
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if (!cxArg->isJSContext())
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return cxArg->addPendingOutOfMemory();
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JSContext* cx = cxArg->asJSContext();
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cx->runtime()->hadOutOfMemory = true;
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AutoSuppressGC suppressGC(cx);
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/* Report the oom. */
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if (JS::OutOfMemoryCallback oomCallback = cx->runtime()->oomCallback)
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oomCallback(cx, cx->runtime()->oomCallbackData);
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cx->setPendingException(StringValue(cx->names().outOfMemory));
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}
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void
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js::ReportOverRecursed(JSContext* maybecx, unsigned errorNumber)
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{
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#ifdef JS_MORE_DETERMINISTIC
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/*
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* We cannot make stack depth deterministic across different
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* implementations (e.g. JIT vs. interpreter will differ in
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* their maximum stack depth).
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* However, we can detect externally when we hit the maximum
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* stack depth which is useful for external testing programs
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* like fuzzers.
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*/
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fprintf(stderr, "ReportOverRecursed called\n");
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#endif
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if (maybecx) {
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JS_ReportErrorNumberASCII(maybecx, GetErrorMessage, nullptr, errorNumber);
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maybecx->overRecursed_ = true;
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}
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}
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JS_FRIEND_API(void)
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js::ReportOverRecursed(JSContext* maybecx)
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{
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ReportOverRecursed(maybecx, JSMSG_OVER_RECURSED);
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}
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void
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js::ReportOverRecursed(ExclusiveContext* cx)
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{
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if (cx->isJSContext())
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ReportOverRecursed(cx->asJSContext());
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else
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cx->addPendingOverRecursed();
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}
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void
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js::ReportAllocationOverflow(ExclusiveContext* cxArg)
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{
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if (!cxArg)
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return;
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if (!cxArg->isJSContext())
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return;
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JSContext* cx = cxArg->asJSContext();
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AutoSuppressGC suppressGC(cx);
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JS_ReportErrorNumberASCII(cx, GetErrorMessage, nullptr, JSMSG_ALLOC_OVERFLOW);
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}
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/*
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* Given flags and the state of cx, decide whether we should report an
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* error, a warning, or just continue execution normally. Return
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* true if we should continue normally, without reporting anything;
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* otherwise, adjust *flags as appropriate and return false.
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*/
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static bool
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checkReportFlags(JSContext* cx, unsigned* flags)
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{
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if (JSREPORT_IS_STRICT(*flags)) {
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/* Warning/error only when JSOPTION_STRICT is set. */
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if (!cx->compartment()->behaviors().extraWarnings(cx))
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return true;
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}
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/* Warnings become errors when JSOPTION_WERROR is set. */
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if (JSREPORT_IS_WARNING(*flags) && cx->options().werror())
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*flags &= ~JSREPORT_WARNING;
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return false;
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}
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bool
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js::ReportErrorVA(JSContext* cx, unsigned flags, const char* format,
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ErrorArgumentsType argumentsType, va_list ap)
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{
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JSErrorReport report;
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if (checkReportFlags(cx, &flags))
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return true;
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UniqueChars message(JS_vsmprintf(format, ap));
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if (!message) {
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ReportOutOfMemory(cx);
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return false;
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}
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MOZ_ASSERT_IF(argumentsType == ArgumentsAreASCII, JS::StringIsASCII(message.get()));
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report.flags = flags;
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report.errorNumber = JSMSG_USER_DEFINED_ERROR;
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if (argumentsType == ArgumentsAreASCII || argumentsType == ArgumentsAreUTF8) {
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report.initOwnedMessage(message.release());
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} else {
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MOZ_ASSERT(argumentsType == ArgumentsAreLatin1);
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Latin1Chars latin1(message.get(), strlen(message.get()));
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UTF8CharsZ utf8(JS::CharsToNewUTF8CharsZ(cx, latin1));
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if (!utf8)
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return false;
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report.initOwnedMessage(reinterpret_cast<const char*>(utf8.get()));
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}
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PopulateReportBlame(cx, &report);
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bool warning = JSREPORT_IS_WARNING(report.flags);
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ReportError(cx, &report, nullptr, nullptr);
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return warning;
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}
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/* |callee| requires a usage string provided by JS_DefineFunctionsWithHelp. */
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void
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js::ReportUsageErrorASCII(JSContext* cx, HandleObject callee, const char* msg)
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{
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const char* usageStr = "usage";
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PropertyName* usageAtom = Atomize(cx, usageStr, strlen(usageStr))->asPropertyName();
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RootedId id(cx, NameToId(usageAtom));
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DebugOnly<Shape*> shape = static_cast<Shape*>(callee->as<JSFunction>().lookup(cx, id));
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MOZ_ASSERT(!shape->configurable());
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MOZ_ASSERT(!shape->writable());
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MOZ_ASSERT(shape->hasDefaultGetter());
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RootedValue usage(cx);
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if (!JS_GetProperty(cx, callee, "usage", &usage))
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return;
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if (!usage.isString()) {
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JS_ReportErrorASCII(cx, "%s", msg);
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} else {
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RootedString usageStr(cx, usage.toString());
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JSAutoByteString str;
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if (!str.encodeUtf8(cx, usageStr))
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return;
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JS_ReportErrorUTF8(cx, "%s. Usage: %s", msg, str.ptr());
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}
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}
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enum class PrintErrorKind {
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Error,
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Warning,
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StrictWarning,
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Note
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};
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static void
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PrintErrorLine(JSContext* cx, FILE* file, const char* prefix, JSErrorReport* report)
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{
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if (const char16_t* linebuf = report->linebuf()) {
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size_t n = report->linebufLength();
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fputs(":\n", file);
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if (prefix)
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fputs(prefix, file);
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for (size_t i = 0; i < n; i++)
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fputc(static_cast<char>(linebuf[i]), file);
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// linebuf usually ends with a newline. If not, add one here.
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if (n == 0 || linebuf[n-1] != '\n')
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fputc('\n', file);
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if (prefix)
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fputs(prefix, file);
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n = report->tokenOffset();
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for (size_t i = 0, j = 0; i < n; i++) {
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if (linebuf[i] == '\t') {
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for (size_t k = (j + 8) & ~7; j < k; j++)
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fputc('.', file);
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continue;
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}
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fputc('.', file);
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j++;
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}
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fputc('^', file);
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}
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}
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static void
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PrintErrorLine(JSContext* cx, FILE* file, const char* prefix, JSErrorNotes::Note* note)
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{
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}
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template <typename T>
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static bool
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PrintSingleError(JSContext* cx, FILE* file, JS::ConstUTF8CharsZ toStringResult,
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T* report, PrintErrorKind kind)
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{
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UniquePtr<char> prefix;
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if (report->filename)
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prefix.reset(JS_smprintf("%s:", report->filename));
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if (report->lineno) {
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UniquePtr<char> tmp(JS_smprintf("%s%u:%u ", prefix ? prefix.get() : "", report->lineno,
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report->column));
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prefix = Move(tmp);
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}
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if (kind != PrintErrorKind::Error) {
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const char* kindPrefix = nullptr;
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switch (kind) {
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case PrintErrorKind::Error:
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break;
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case PrintErrorKind::Warning:
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kindPrefix = "warning";
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break;
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case PrintErrorKind::StrictWarning:
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kindPrefix = "strict warning";
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break;
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case PrintErrorKind::Note:
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kindPrefix = "note";
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break;
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}
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UniquePtr<char> tmp(JS_smprintf("%s%s: ", prefix ? prefix.get() : "", kindPrefix));
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prefix = Move(tmp);
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}
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const char* message = toStringResult ? toStringResult.c_str() : report->message().c_str();
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/* embedded newlines -- argh! */
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const char* ctmp;
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while ((ctmp = strchr(message, '\n')) != 0) {
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ctmp++;
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if (prefix)
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fputs(prefix.get(), file);
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fwrite(message, 1, ctmp - message, file);
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message = ctmp;
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}
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/* If there were no filename or lineno, the prefix might be empty */
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if (prefix)
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fputs(prefix.get(), file);
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fputs(message, file);
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PrintErrorLine(cx, file, prefix.get(), report);
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fputc('\n', file);
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fflush(file);
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return true;
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}
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bool
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js::PrintError(JSContext* cx, FILE* file, JS::ConstUTF8CharsZ toStringResult,
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JSErrorReport* report, bool reportWarnings)
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{
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MOZ_ASSERT(report);
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/* Conditionally ignore reported warnings. */
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if (JSREPORT_IS_WARNING(report->flags) && !reportWarnings)
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return false;
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PrintErrorKind kind = PrintErrorKind::Error;
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if (JSREPORT_IS_WARNING(report->flags)) {
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if (JSREPORT_IS_STRICT(report->flags))
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kind = PrintErrorKind::StrictWarning;
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else
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kind = PrintErrorKind::Warning;
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}
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PrintSingleError(cx, file, toStringResult, report, kind);
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if (report->notes) {
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for (auto&& note : *report->notes)
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PrintSingleError(cx, file, JS::ConstUTF8CharsZ(), note.get(), PrintErrorKind::Note);
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}
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return true;
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}
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class MOZ_RAII AutoMessageArgs
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{
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size_t totalLength_;
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/* only {0} thru {9} supported */
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mozilla::Array<const char*, JS::MaxNumErrorArguments> args_;
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mozilla::Array<size_t, JS::MaxNumErrorArguments> lengths_;
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uint16_t count_;
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bool allocatedElements_ : 1;
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public:
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AutoMessageArgs()
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: totalLength_(0), count_(0), allocatedElements_(false)
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{
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PodArrayZero(args_);
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}
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|
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~AutoMessageArgs()
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{
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/* free the arguments only if we allocated them */
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if (allocatedElements_) {
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uint16_t i = 0;
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while (i < count_) {
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if (args_[i])
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js_free((void*)args_[i]);
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i++;
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}
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}
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}
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const char* args(size_t i) const {
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MOZ_ASSERT(i < count_);
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return args_[i];
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}
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|
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size_t totalLength() const {
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return totalLength_;
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}
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|
|
size_t lengths(size_t i) const {
|
|
MOZ_ASSERT(i < count_);
|
|
return lengths_[i];
|
|
}
|
|
|
|
uint16_t count() const {
|
|
return count_;
|
|
}
|
|
|
|
/* Gather the arguments into an array, and accumulate their sizes. */
|
|
bool init(ExclusiveContext* cx, const char16_t** argsArg, uint16_t countArg,
|
|
ErrorArgumentsType typeArg, va_list ap) {
|
|
MOZ_ASSERT(countArg > 0);
|
|
|
|
count_ = countArg;
|
|
|
|
for (uint16_t i = 0; i < count_; i++) {
|
|
switch (typeArg) {
|
|
case ArgumentsAreASCII:
|
|
case ArgumentsAreUTF8: {
|
|
MOZ_ASSERT(!argsArg);
|
|
args_[i] = va_arg(ap, char*);
|
|
MOZ_ASSERT_IF(typeArg == ArgumentsAreASCII, JS::StringIsASCII(args_[i]));
|
|
lengths_[i] = strlen(args_[i]);
|
|
break;
|
|
}
|
|
case ArgumentsAreLatin1: {
|
|
MOZ_ASSERT(!argsArg);
|
|
const Latin1Char* latin1 = va_arg(ap, Latin1Char*);
|
|
size_t len = strlen(reinterpret_cast<const char*>(latin1));
|
|
mozilla::Range<const Latin1Char> range(latin1, len);
|
|
char* utf8 = JS::CharsToNewUTF8CharsZ(cx, range).c_str();
|
|
if (!utf8)
|
|
return false;
|
|
|
|
args_[i] = utf8;
|
|
lengths_[i] = strlen(utf8);
|
|
allocatedElements_ = true;
|
|
break;
|
|
}
|
|
case ArgumentsAreUnicode: {
|
|
const char16_t* uc = argsArg ? argsArg[i] : va_arg(ap, char16_t*);
|
|
size_t len = js_strlen(uc);
|
|
mozilla::Range<const char16_t> range(uc, len);
|
|
char* utf8 = JS::CharsToNewUTF8CharsZ(cx, range).c_str();
|
|
if (!utf8)
|
|
return false;
|
|
|
|
args_[i] = utf8;
|
|
lengths_[i] = strlen(utf8);
|
|
allocatedElements_ = true;
|
|
break;
|
|
}
|
|
}
|
|
totalLength_ += lengths_[i];
|
|
}
|
|
return true;
|
|
}
|
|
};
|
|
|
|
static void
|
|
SetExnType(JSErrorReport* reportp, int16_t exnType)
|
|
{
|
|
reportp->exnType = exnType;
|
|
}
|
|
|
|
static void
|
|
SetExnType(JSErrorNotes::Note* notep, int16_t exnType)
|
|
{
|
|
// Do nothing for JSErrorNotes::Note.
|
|
}
|
|
|
|
/*
|
|
* The arguments from ap need to be packaged up into an array and stored
|
|
* into the report struct.
|
|
*
|
|
* The format string addressed by the error number may contain operands
|
|
* identified by the format {N}, where N is a decimal digit. Each of these
|
|
* is to be replaced by the Nth argument from the va_list. The complete
|
|
* message is placed into reportp->message_.
|
|
*
|
|
* Returns true if the expansion succeeds (can fail if out of memory).
|
|
*/
|
|
template <typename T>
|
|
bool
|
|
ExpandErrorArgumentsHelper(ExclusiveContext* cx, JSErrorCallback callback,
|
|
void* userRef, const unsigned errorNumber,
|
|
const char16_t** messageArgs,
|
|
ErrorArgumentsType argumentsType,
|
|
T* reportp, va_list ap)
|
|
{
|
|
const JSErrorFormatString* efs;
|
|
|
|
if (!callback)
|
|
callback = GetErrorMessage;
|
|
|
|
{
|
|
AutoSuppressGC suppressGC(cx);
|
|
efs = callback(userRef, errorNumber);
|
|
}
|
|
|
|
if (efs) {
|
|
SetExnType(reportp, efs->exnType);
|
|
|
|
MOZ_ASSERT_IF(argumentsType == ArgumentsAreASCII, JS::StringIsASCII(efs->format));
|
|
|
|
uint16_t argCount = efs->argCount;
|
|
MOZ_RELEASE_ASSERT(argCount <= JS::MaxNumErrorArguments);
|
|
if (argCount > 0) {
|
|
/*
|
|
* Parse the error format, substituting the argument X
|
|
* for {X} in the format.
|
|
*/
|
|
if (efs->format) {
|
|
const char* fmt;
|
|
char* out;
|
|
#ifdef DEBUG
|
|
int expandedArgs = 0;
|
|
#endif
|
|
size_t expandedLength;
|
|
size_t len = strlen(efs->format);
|
|
|
|
AutoMessageArgs args;
|
|
if (!args.init(cx, messageArgs, argCount, argumentsType, ap))
|
|
return false;
|
|
|
|
expandedLength = len
|
|
- (3 * args.count()) /* exclude the {n} */
|
|
+ args.totalLength();
|
|
|
|
/*
|
|
* Note - the above calculation assumes that each argument
|
|
* is used once and only once in the expansion !!!
|
|
*/
|
|
char* utf8 = out = cx->pod_malloc<char>(expandedLength + 1);
|
|
if (!out)
|
|
return false;
|
|
|
|
fmt = efs->format;
|
|
while (*fmt) {
|
|
if (*fmt == '{') {
|
|
if (isdigit(fmt[1])) {
|
|
int d = JS7_UNDEC(fmt[1]);
|
|
MOZ_RELEASE_ASSERT(d < args.count());
|
|
strncpy(out, args.args(d), args.lengths(d));
|
|
out += args.lengths(d);
|
|
fmt += 3;
|
|
#ifdef DEBUG
|
|
expandedArgs++;
|
|
#endif
|
|
continue;
|
|
}
|
|
}
|
|
*out++ = *fmt++;
|
|
}
|
|
MOZ_ASSERT(expandedArgs == args.count());
|
|
*out = 0;
|
|
|
|
reportp->initOwnedMessage(utf8);
|
|
}
|
|
} else {
|
|
/* Non-null messageArgs should have at least one non-null arg. */
|
|
MOZ_ASSERT(!messageArgs);
|
|
/*
|
|
* Zero arguments: the format string (if it exists) is the
|
|
* entire message.
|
|
*/
|
|
if (efs->format)
|
|
reportp->initBorrowedMessage(efs->format);
|
|
}
|
|
}
|
|
if (!reportp->message()) {
|
|
/* where's the right place for this ??? */
|
|
const char* defaultErrorMessage
|
|
= "No error message available for error number %d";
|
|
size_t nbytes = strlen(defaultErrorMessage) + 16;
|
|
char* message = cx->pod_malloc<char>(nbytes);
|
|
if (!message)
|
|
return false;
|
|
snprintf(message, nbytes, defaultErrorMessage, errorNumber);
|
|
reportp->initOwnedMessage(message);
|
|
}
|
|
return true;
|
|
}
|
|
|
|
bool
|
|
js::ExpandErrorArgumentsVA(ExclusiveContext* cx, JSErrorCallback callback,
|
|
void* userRef, const unsigned errorNumber,
|
|
const char16_t** messageArgs,
|
|
ErrorArgumentsType argumentsType,
|
|
JSErrorReport* reportp, va_list ap)
|
|
{
|
|
return ExpandErrorArgumentsHelper(cx, callback, userRef, errorNumber,
|
|
messageArgs, argumentsType, reportp, ap);
|
|
}
|
|
|
|
bool
|
|
js::ExpandErrorArgumentsVA(ExclusiveContext* cx, JSErrorCallback callback,
|
|
void* userRef, const unsigned errorNumber,
|
|
const char16_t** messageArgs,
|
|
ErrorArgumentsType argumentsType,
|
|
JSErrorNotes::Note* notep, va_list ap)
|
|
{
|
|
return ExpandErrorArgumentsHelper(cx, callback, userRef, errorNumber,
|
|
messageArgs, argumentsType, notep, ap);
|
|
}
|
|
|
|
bool
|
|
js::ReportErrorNumberVA(JSContext* cx, unsigned flags, JSErrorCallback callback,
|
|
void* userRef, const unsigned errorNumber,
|
|
ErrorArgumentsType argumentsType, va_list ap)
|
|
{
|
|
JSErrorReport report;
|
|
bool warning;
|
|
|
|
if (checkReportFlags(cx, &flags))
|
|
return true;
|
|
warning = JSREPORT_IS_WARNING(flags);
|
|
|
|
report.flags = flags;
|
|
report.errorNumber = errorNumber;
|
|
PopulateReportBlame(cx, &report);
|
|
|
|
if (!ExpandErrorArgumentsVA(cx, callback, userRef, errorNumber,
|
|
nullptr, argumentsType, &report, ap)) {
|
|
return false;
|
|
}
|
|
|
|
ReportError(cx, &report, callback, userRef);
|
|
|
|
return warning;
|
|
}
|
|
|
|
static bool
|
|
ExpandErrorArguments(ExclusiveContext* cx, JSErrorCallback callback,
|
|
void* userRef, const unsigned errorNumber,
|
|
const char16_t** messageArgs,
|
|
ErrorArgumentsType argumentsType,
|
|
JSErrorReport* reportp, ...)
|
|
{
|
|
va_list ap;
|
|
va_start(ap, reportp);
|
|
bool expanded = js::ExpandErrorArgumentsVA(cx, callback, userRef, errorNumber,
|
|
messageArgs, argumentsType, reportp, ap);
|
|
va_end(ap);
|
|
return expanded;
|
|
}
|
|
|
|
bool
|
|
js::ReportErrorNumberUCArray(JSContext* cx, unsigned flags, JSErrorCallback callback,
|
|
void* userRef, const unsigned errorNumber,
|
|
const char16_t** args)
|
|
{
|
|
if (checkReportFlags(cx, &flags))
|
|
return true;
|
|
bool warning = JSREPORT_IS_WARNING(flags);
|
|
|
|
JSErrorReport report;
|
|
report.flags = flags;
|
|
report.errorNumber = errorNumber;
|
|
PopulateReportBlame(cx, &report);
|
|
|
|
if (!ExpandErrorArguments(cx, callback, userRef, errorNumber,
|
|
args, ArgumentsAreUnicode, &report))
|
|
{
|
|
return false;
|
|
}
|
|
|
|
ReportError(cx, &report, callback, userRef);
|
|
|
|
return warning;
|
|
}
|
|
|
|
void
|
|
js::CallWarningReporter(JSContext* cx, JSErrorReport* reportp)
|
|
{
|
|
MOZ_ASSERT(reportp);
|
|
MOZ_ASSERT(JSREPORT_IS_WARNING(reportp->flags));
|
|
|
|
if (JS::WarningReporter warningReporter = cx->runtime()->warningReporter)
|
|
warningReporter(cx, reportp);
|
|
}
|
|
|
|
bool
|
|
js::ReportIsNotDefined(JSContext* cx, HandleId id)
|
|
{
|
|
JSAutoByteString printable;
|
|
if (ValueToPrintable(cx, IdToValue(id), &printable)) {
|
|
JS_ReportErrorNumberLatin1(cx, GetErrorMessage, nullptr, JSMSG_NOT_DEFINED,
|
|
printable.ptr());
|
|
}
|
|
return false;
|
|
}
|
|
|
|
bool
|
|
js::ReportIsNotDefined(JSContext* cx, HandlePropertyName name)
|
|
{
|
|
RootedId id(cx, NameToId(name));
|
|
return ReportIsNotDefined(cx, id);
|
|
}
|
|
|
|
bool
|
|
js::ReportIsNullOrUndefined(JSContext* cx, int spindex, HandleValue v,
|
|
HandleString fallback)
|
|
{
|
|
bool ok;
|
|
|
|
UniqueChars bytes = DecompileValueGenerator(cx, spindex, v, fallback);
|
|
if (!bytes)
|
|
return false;
|
|
|
|
if (strcmp(bytes.get(), js_undefined_str) == 0 ||
|
|
strcmp(bytes.get(), js_null_str) == 0) {
|
|
ok = JS_ReportErrorFlagsAndNumberLatin1(cx, JSREPORT_ERROR,
|
|
GetErrorMessage, nullptr,
|
|
JSMSG_NO_PROPERTIES,
|
|
bytes.get());
|
|
} else if (v.isUndefined()) {
|
|
ok = JS_ReportErrorFlagsAndNumberLatin1(cx, JSREPORT_ERROR,
|
|
GetErrorMessage, nullptr,
|
|
JSMSG_UNEXPECTED_TYPE,
|
|
bytes.get(), js_undefined_str);
|
|
} else {
|
|
MOZ_ASSERT(v.isNull());
|
|
ok = JS_ReportErrorFlagsAndNumberLatin1(cx, JSREPORT_ERROR,
|
|
GetErrorMessage, nullptr,
|
|
JSMSG_UNEXPECTED_TYPE,
|
|
bytes.get(), js_null_str);
|
|
}
|
|
|
|
return ok;
|
|
}
|
|
|
|
void
|
|
js::ReportMissingArg(JSContext* cx, HandleValue v, unsigned arg)
|
|
{
|
|
char argbuf[11];
|
|
UniqueChars bytes;
|
|
|
|
SprintfLiteral(argbuf, "%u", arg);
|
|
if (IsFunctionObject(v)) {
|
|
RootedAtom name(cx, v.toObject().as<JSFunction>().explicitName());
|
|
bytes = DecompileValueGenerator(cx, JSDVG_SEARCH_STACK, v, name);
|
|
if (!bytes)
|
|
return;
|
|
}
|
|
JS_ReportErrorNumberLatin1(cx, GetErrorMessage, nullptr,
|
|
JSMSG_MISSING_FUN_ARG,
|
|
argbuf, bytes ? bytes.get() : "");
|
|
}
|
|
|
|
bool
|
|
js::ReportValueErrorFlags(JSContext* cx, unsigned flags, const unsigned errorNumber,
|
|
int spindex, HandleValue v, HandleString fallback,
|
|
const char* arg1, const char* arg2)
|
|
{
|
|
UniqueChars bytes;
|
|
bool ok;
|
|
|
|
MOZ_ASSERT(js_ErrorFormatString[errorNumber].argCount >= 1);
|
|
MOZ_ASSERT(js_ErrorFormatString[errorNumber].argCount <= 3);
|
|
bytes = DecompileValueGenerator(cx, spindex, v, fallback);
|
|
if (!bytes)
|
|
return false;
|
|
|
|
ok = JS_ReportErrorFlagsAndNumberLatin1(cx, flags, GetErrorMessage, nullptr, errorNumber,
|
|
bytes.get(), arg1, arg2);
|
|
return ok;
|
|
}
|
|
|
|
JSObject*
|
|
js::CreateErrorNotesArray(JSContext* cx, JSErrorReport* report)
|
|
{
|
|
RootedArrayObject notesArray(cx, NewDenseEmptyArray(cx));
|
|
if (!notesArray)
|
|
return nullptr;
|
|
|
|
if (!report->notes)
|
|
return notesArray;
|
|
|
|
for (auto&& note : *report->notes) {
|
|
RootedPlainObject noteObj(cx, NewBuiltinClassInstance<PlainObject>(cx));
|
|
if (!noteObj)
|
|
return nullptr;
|
|
|
|
RootedString messageStr(cx, note->newMessageString(cx));
|
|
if (!messageStr)
|
|
return nullptr;
|
|
RootedValue messageVal(cx, StringValue(messageStr));
|
|
if (!DefineProperty(cx, noteObj, cx->names().message, messageVal))
|
|
return nullptr;
|
|
|
|
RootedValue filenameVal(cx);
|
|
if (note->filename) {
|
|
RootedString filenameStr(cx, NewStringCopyZ<CanGC>(cx, note->filename));
|
|
if (!filenameStr)
|
|
return nullptr;
|
|
filenameVal = StringValue(filenameStr);
|
|
}
|
|
if (!DefineProperty(cx, noteObj, cx->names().fileName, filenameVal))
|
|
return nullptr;
|
|
|
|
RootedValue linenoVal(cx, Int32Value(note->lineno));
|
|
if (!DefineProperty(cx, noteObj, cx->names().lineNumber, linenoVal))
|
|
return nullptr;
|
|
RootedValue columnVal(cx, Int32Value(note->column));
|
|
if (!DefineProperty(cx, noteObj, cx->names().columnNumber, columnVal))
|
|
return nullptr;
|
|
|
|
if (!NewbornArrayPush(cx, notesArray, ObjectValue(*noteObj)))
|
|
return nullptr;
|
|
}
|
|
|
|
return notesArray;
|
|
}
|
|
|
|
const JSErrorFormatString js_ErrorFormatString[JSErr_Limit] = {
|
|
#define MSG_DEF(name, count, exception, format) \
|
|
{ #name, format, count, exception } ,
|
|
#include "js.msg"
|
|
#undef MSG_DEF
|
|
};
|
|
|
|
JS_FRIEND_API(const JSErrorFormatString*)
|
|
js::GetErrorMessage(void* userRef, const unsigned errorNumber)
|
|
{
|
|
if (errorNumber > 0 && errorNumber < JSErr_Limit)
|
|
return &js_ErrorFormatString[errorNumber];
|
|
return nullptr;
|
|
}
|
|
|
|
ExclusiveContext::ExclusiveContext(JSRuntime* rt, PerThreadData* pt, ContextKind kind,
|
|
const JS::ContextOptions& options)
|
|
: ContextFriendFields(kind == Context_JS),
|
|
runtime_(rt),
|
|
helperThread_(nullptr),
|
|
contextKind_(kind),
|
|
options_(options),
|
|
perThreadData(pt),
|
|
arenas_(nullptr),
|
|
enterCompartmentDepth_(0)
|
|
{
|
|
}
|
|
|
|
void
|
|
ExclusiveContext::recoverFromOutOfMemory()
|
|
{
|
|
if (JSContext* maybecx = maybeJSContext()) {
|
|
if (maybecx->isExceptionPending()) {
|
|
MOZ_ASSERT(maybecx->isThrowingOutOfMemory());
|
|
maybecx->clearPendingException();
|
|
}
|
|
return;
|
|
}
|
|
// Keep in sync with addPendingOutOfMemory.
|
|
if (ParseTask* task = helperThread()->parseTask())
|
|
task->outOfMemory = false;
|
|
}
|
|
|
|
JSContext::JSContext(JSRuntime* parentRuntime)
|
|
: ExclusiveContext(this, &this->JSRuntime::mainThread, Context_JS, JS::ContextOptions()),
|
|
JSRuntime(parentRuntime),
|
|
throwing(false),
|
|
unwrappedException_(this),
|
|
overRecursed_(false),
|
|
propagatingForcedReturn_(false),
|
|
liveVolatileJitFrameIterators_(nullptr),
|
|
reportGranularity(JS_DEFAULT_JITREPORT_GRANULARITY),
|
|
resolvingList(nullptr),
|
|
generatingError(false),
|
|
data(nullptr),
|
|
outstandingRequests(0),
|
|
jitIsBroken(false),
|
|
asyncStackForNewActivations(this),
|
|
asyncCauseForNewActivations(nullptr),
|
|
asyncCallIsExplicit(false)
|
|
{
|
|
MOZ_ASSERT(static_cast<ContextFriendFields*>(this) ==
|
|
ContextFriendFields::get(this));
|
|
}
|
|
|
|
JSContext::~JSContext()
|
|
{
|
|
destroyRuntime();
|
|
|
|
/* Free the stuff hanging off of cx. */
|
|
MOZ_ASSERT(!resolvingList);
|
|
}
|
|
|
|
bool
|
|
JSContext::getPendingException(MutableHandleValue rval)
|
|
{
|
|
MOZ_ASSERT(throwing);
|
|
rval.set(unwrappedException_);
|
|
if (IsAtomsCompartment(compartment()))
|
|
return true;
|
|
bool wasOverRecursed = overRecursed_;
|
|
clearPendingException();
|
|
if (!compartment()->wrap(this, rval))
|
|
return false;
|
|
assertSameCompartment(this, rval);
|
|
setPendingException(rval);
|
|
overRecursed_ = wasOverRecursed;
|
|
return true;
|
|
}
|
|
|
|
bool
|
|
JSContext::isThrowingOutOfMemory()
|
|
{
|
|
return throwing && unwrappedException_ == StringValue(names().outOfMemory);
|
|
}
|
|
|
|
bool
|
|
JSContext::isClosingGenerator()
|
|
{
|
|
return throwing && unwrappedException_.isMagic(JS_GENERATOR_CLOSING);
|
|
}
|
|
|
|
bool
|
|
JSContext::isThrowingDebuggeeWouldRun()
|
|
{
|
|
return throwing &&
|
|
unwrappedException_.isObject() &&
|
|
unwrappedException_.toObject().is<ErrorObject>() &&
|
|
unwrappedException_.toObject().as<ErrorObject>().type() == JSEXN_DEBUGGEEWOULDRUN;
|
|
}
|
|
|
|
bool
|
|
JSContext::currentlyRunning() const
|
|
{
|
|
return !!activation();
|
|
}
|
|
|
|
static bool
|
|
ComputeIsJITBroken()
|
|
{
|
|
#if !defined(ANDROID)
|
|
return false;
|
|
#else // ANDROID
|
|
if (getenv("JS_IGNORE_JIT_BROKENNESS")) {
|
|
return false;
|
|
}
|
|
|
|
std::string line;
|
|
|
|
// Check for the known-bad kernel version (2.6.29).
|
|
std::ifstream osrelease("/proc/sys/kernel/osrelease");
|
|
std::getline(osrelease, line);
|
|
__android_log_print(ANDROID_LOG_INFO, "Gecko", "Detected osrelease `%s'",
|
|
line.c_str());
|
|
|
|
if (line.npos == line.find("2.6.29")) {
|
|
// We're using something other than 2.6.29, so the JITs should work.
|
|
__android_log_print(ANDROID_LOG_INFO, "Gecko", "JITs are not broken");
|
|
return false;
|
|
}
|
|
|
|
// We're using 2.6.29, and this causes trouble with the JITs on i9000.
|
|
line = "";
|
|
bool broken = false;
|
|
std::ifstream cpuinfo("/proc/cpuinfo");
|
|
do {
|
|
if (0 == line.find("Hardware")) {
|
|
static const char* const blacklist[] = {
|
|
"SCH-I400", // Samsung Continuum
|
|
"SGH-T959", // Samsung i9000, Vibrant device
|
|
"SGH-I897", // Samsung i9000, Captivate device
|
|
"SCH-I500", // Samsung i9000, Fascinate device
|
|
"SPH-D700", // Samsung i9000, Epic device
|
|
"GT-I9000", // Samsung i9000, UK/Europe device
|
|
nullptr
|
|
};
|
|
for (const char* const* hw = &blacklist[0]; *hw; ++hw) {
|
|
if (line.npos != line.find(*hw)) {
|
|
__android_log_print(ANDROID_LOG_INFO, "Gecko",
|
|
"Blacklisted device `%s'", *hw);
|
|
broken = true;
|
|
break;
|
|
}
|
|
}
|
|
break;
|
|
}
|
|
std::getline(cpuinfo, line);
|
|
} while(!cpuinfo.fail() && !cpuinfo.eof());
|
|
|
|
__android_log_print(ANDROID_LOG_INFO, "Gecko", "JITs are %sbroken",
|
|
broken ? "" : "not ");
|
|
|
|
return broken;
|
|
#endif // ifndef ANDROID
|
|
}
|
|
|
|
static bool
|
|
IsJITBrokenHere()
|
|
{
|
|
static bool computedIsBroken = false;
|
|
static bool isBroken = false;
|
|
if (!computedIsBroken) {
|
|
isBroken = ComputeIsJITBroken();
|
|
computedIsBroken = true;
|
|
}
|
|
return isBroken;
|
|
}
|
|
|
|
void
|
|
JSContext::updateJITEnabled()
|
|
{
|
|
jitIsBroken = IsJITBrokenHere();
|
|
}
|
|
|
|
size_t
|
|
JSContext::sizeOfExcludingThis(mozilla::MallocSizeOf mallocSizeOf) const
|
|
{
|
|
/*
|
|
* There are other JSContext members that could be measured; the following
|
|
* ones have been found by DMD to be worth measuring. More stuff may be
|
|
* added later.
|
|
*/
|
|
return cycleDetectorSet.sizeOfExcludingThis(mallocSizeOf);
|
|
}
|
|
|
|
void
|
|
JSContext::mark(JSTracer* trc)
|
|
{
|
|
if (cycleDetectorSet.initialized())
|
|
TraceCycleDetectionSet(trc, cycleDetectorSet);
|
|
|
|
if (compartment_)
|
|
compartment_->mark();
|
|
}
|
|
|
|
void*
|
|
ExclusiveContext::stackLimitAddressForJitCode(StackKind kind)
|
|
{
|
|
#ifdef JS_SIMULATOR
|
|
return runtime_->addressOfSimulatorStackLimit();
|
|
#else
|
|
return stackLimitAddress(kind);
|
|
#endif
|
|
}
|
|
|
|
uintptr_t
|
|
ExclusiveContext::stackLimitForJitCode(StackKind kind)
|
|
{
|
|
#ifdef JS_SIMULATOR
|
|
return runtime_->simulator()->stackLimit();
|
|
#else
|
|
return stackLimit(kind);
|
|
#endif
|
|
}
|
|
|
|
void
|
|
JSContext::resetJitStackLimit()
|
|
{
|
|
// Note that, for now, we use the untrusted limit for ion. This is fine,
|
|
// because it's the most conservative limit, and if we hit it, we'll bail
|
|
// out of ion into the interpreter, which will do a proper recursion check.
|
|
#ifdef JS_SIMULATOR
|
|
jitStackLimit_ = jit::Simulator::StackLimit();
|
|
#else
|
|
jitStackLimit_ = nativeStackLimit[StackForUntrustedScript];
|
|
#endif
|
|
jitStackLimitNoInterrupt_ = jitStackLimit_;
|
|
}
|
|
|
|
void
|
|
JSContext::initJitStackLimit()
|
|
{
|
|
resetJitStackLimit();
|
|
}
|
|
|
|
JSVersion
|
|
JSContext::findVersion() const
|
|
{
|
|
if (JSScript* script = currentScript(nullptr, ALLOW_CROSS_COMPARTMENT))
|
|
return script->getVersion();
|
|
|
|
if (compartment() && compartment()->behaviors().version() != JSVERSION_UNKNOWN)
|
|
return compartment()->behaviors().version();
|
|
|
|
return defaultVersion();
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
|
|
JS::AutoCheckRequestDepth::AutoCheckRequestDepth(JSContext* cx)
|
|
: cx(cx)
|
|
{
|
|
MOZ_ASSERT(cx->runtime()->requestDepth || cx->runtime()->isHeapBusy());
|
|
MOZ_ASSERT(CurrentThreadCanAccessRuntime(cx->runtime()));
|
|
cx->runtime()->checkRequestDepth++;
|
|
}
|
|
|
|
JS::AutoCheckRequestDepth::AutoCheckRequestDepth(ContextFriendFields* cxArg)
|
|
: cx(static_cast<ExclusiveContext*>(cxArg)->maybeJSContext())
|
|
{
|
|
if (cx) {
|
|
MOZ_ASSERT(cx->runtime()->requestDepth || cx->runtime()->isHeapBusy());
|
|
MOZ_ASSERT(CurrentThreadCanAccessRuntime(cx->runtime()));
|
|
cx->runtime()->checkRequestDepth++;
|
|
}
|
|
}
|
|
|
|
JS::AutoCheckRequestDepth::~AutoCheckRequestDepth()
|
|
{
|
|
if (cx) {
|
|
MOZ_ASSERT(cx->runtime()->checkRequestDepth != 0);
|
|
cx->runtime()->checkRequestDepth--;
|
|
}
|
|
}
|
|
|
|
#endif
|
|
|
|
#ifdef JS_CRASH_DIAGNOSTICS
|
|
void
|
|
CompartmentChecker::check(InterpreterFrame* fp)
|
|
{
|
|
if (fp)
|
|
check(fp->environmentChain());
|
|
}
|
|
|
|
void
|
|
CompartmentChecker::check(AbstractFramePtr frame)
|
|
{
|
|
if (frame)
|
|
check(frame.environmentChain());
|
|
}
|
|
#endif
|
|
|
|
void
|
|
AutoEnterOOMUnsafeRegion::crash(const char* reason)
|
|
{
|
|
char msgbuf[1024];
|
|
SprintfLiteral(msgbuf, "[unhandlable oom] %s", reason);
|
|
MOZ_ReportAssertionFailure(msgbuf, __FILE__, __LINE__);
|
|
MOZ_CRASH();
|
|
}
|
|
|
|
AutoEnterOOMUnsafeRegion::AnnotateOOMAllocationSizeCallback
|
|
AutoEnterOOMUnsafeRegion::annotateOOMSizeCallback = nullptr;
|
|
|
|
void
|
|
AutoEnterOOMUnsafeRegion::crash(size_t size, const char* reason)
|
|
{
|
|
{
|
|
JS::AutoSuppressGCAnalysis suppress;
|
|
if (annotateOOMSizeCallback)
|
|
annotateOOMSizeCallback(size);
|
|
}
|
|
crash(reason);
|
|
}
|