forked from mirrors/gecko-dev
843f943758
# ignore-this-changeset Differential Revision: https://phabricator.services.mozilla.com/D85678
138 lines
4.3 KiB
C++
138 lines
4.3 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*-
|
|
* vim: set ts=8 sts=2 et sw=2 tw=80:
|
|
* This Source Code Form is subject to the terms of the Mozilla Public
|
|
* License, v. 2.0. If a copy of the MPL was not distributed with this
|
|
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
|
|
|
|
#include "shell/jsrtfuzzing/jsrtfuzzing.h"
|
|
|
|
#include "mozilla/ArrayUtils.h" // mozilla::ArrayLength
|
|
#include "mozilla/Assertions.h" // MOZ_CRASH
|
|
#include "mozilla/Utf8.h" // mozilla::Utf8Unit
|
|
|
|
#include <stdio.h> // fflush, fprintf, fputs
|
|
|
|
#include "FuzzerDefs.h"
|
|
#include "FuzzingInterface.h"
|
|
#include "jsapi.h" // JS_ClearPendingException, JS_IsExceptionPending, JS_SetProperty
|
|
|
|
#include "js/CompilationAndEvaluation.h" // JS::Evaluate
|
|
#include "js/CompileOptions.h" // JS::CompileOptions
|
|
#include "js/ErrorReport.h" // JS::PrintError
|
|
#include "js/Exception.h" // JS::StealPendingExceptionStack
|
|
#include "js/experimental/TypedData.h" // JS_GetUint8ClampedArrayData, JS_NewUint8ClampedArray
|
|
#include "js/RootingAPI.h" // JS::Rooted
|
|
#include "js/SourceText.h" // JS::Source{Ownership,Text}
|
|
#include "js/Value.h" // JS::Value
|
|
#include "shell/jsshell.h" // js::shell::{reportWarnings,PrintStackTrace,sArg{c,v}}
|
|
#include "vm/Interpreter.h"
|
|
#include "vm/TypedArrayObject.h"
|
|
|
|
#include "vm/ArrayBufferObject-inl.h"
|
|
#include "vm/JSContext-inl.h"
|
|
|
|
static JSContext* gCx = nullptr;
|
|
static std::string gFuzzModuleName;
|
|
|
|
static void CrashOnPendingException() {
|
|
if (JS_IsExceptionPending(gCx)) {
|
|
JS::ExceptionStack exnStack(gCx);
|
|
(void)JS::StealPendingExceptionStack(gCx, &exnStack);
|
|
|
|
JS::ErrorReportBuilder report(gCx);
|
|
if (!report.init(gCx, exnStack, JS::ErrorReportBuilder::WithSideEffects)) {
|
|
fprintf(stderr, "out of memory initializing JS::ErrorReportBuilder\n");
|
|
fflush(stderr);
|
|
} else {
|
|
JS::PrintError(gCx, stderr, report, js::shell::reportWarnings);
|
|
if (!js::shell::PrintStackTrace(gCx, exnStack.stack())) {
|
|
fputs("(Unable to print stack trace)\n", stderr);
|
|
}
|
|
}
|
|
|
|
MOZ_CRASH("Unhandled exception from JS runtime!");
|
|
}
|
|
}
|
|
|
|
int js::shell::FuzzJSRuntimeStart(JSContext* cx, int* argc, char*** argv) {
|
|
gCx = cx;
|
|
gFuzzModuleName = getenv("FUZZER");
|
|
|
|
int ret = FuzzJSRuntimeInit(argc, argv);
|
|
if (ret) {
|
|
fprintf(stderr, "Fuzzing Interface: Error: Initialize callback failed\n");
|
|
return ret;
|
|
}
|
|
|
|
#ifdef LIBFUZZER
|
|
fuzzer::FuzzerDriver(&shell::sArgc, &shell::sArgv, FuzzJSRuntimeFuzz);
|
|
#elif __AFL_COMPILER
|
|
MOZ_CRASH("AFL is unsupported for JS runtime fuzzing integration");
|
|
#endif
|
|
return 0;
|
|
}
|
|
|
|
int js::shell::FuzzJSRuntimeInit(int* argc, char*** argv) {
|
|
JS::Rooted<JS::Value> v(gCx);
|
|
JS::CompileOptions opts(gCx);
|
|
|
|
// Load the fuzzing module specified in the FUZZER environment variable
|
|
JS::EvaluateUtf8Path(gCx, opts, gFuzzModuleName.c_str(), &v);
|
|
|
|
// Any errors while loading the fuzzing module should be fatal
|
|
CrashOnPendingException();
|
|
|
|
return 0;
|
|
}
|
|
|
|
int js::shell::FuzzJSRuntimeFuzz(const uint8_t* buf, size_t size) {
|
|
if (!size) {
|
|
return 0;
|
|
}
|
|
|
|
JS::Rooted<JSObject*> arr(gCx, JS_NewUint8ClampedArray(gCx, size));
|
|
if (!arr) {
|
|
MOZ_CRASH("OOM");
|
|
}
|
|
|
|
do {
|
|
JS::AutoCheckCannotGC nogc;
|
|
bool isShared;
|
|
uint8_t* data = JS_GetUint8ClampedArrayData(arr, &isShared, nogc);
|
|
MOZ_RELEASE_ASSERT(!isShared);
|
|
memcpy(data, buf, size);
|
|
} while (false);
|
|
|
|
JS::RootedValue arrVal(gCx, JS::ObjectValue(*arr));
|
|
if (!JS_SetProperty(gCx, gCx->global(), "fuzzBuf", arrVal)) {
|
|
MOZ_CRASH("JS_SetProperty failed");
|
|
}
|
|
|
|
JS::Rooted<JS::Value> v(gCx);
|
|
JS::CompileOptions opts(gCx);
|
|
|
|
static const char data[] = "JSFuzzIterate();";
|
|
|
|
JS::SourceText<mozilla::Utf8Unit> srcBuf;
|
|
if (!srcBuf.init(gCx, data, mozilla::ArrayLength(data) - 1,
|
|
JS::SourceOwnership::Borrowed)) {
|
|
return 1;
|
|
}
|
|
|
|
if (!JS::Evaluate(gCx, opts.setFileAndLine(__FILE__, __LINE__), srcBuf, &v) &&
|
|
!JS_IsExceptionPending(gCx)) {
|
|
// A return value of `false` without a pending exception indicates
|
|
// a timeout as triggered by the `timeout` shell function.
|
|
return 1;
|
|
}
|
|
|
|
// The fuzzing module is required to handle any exceptions
|
|
CrashOnPendingException();
|
|
|
|
int32_t ret = 0;
|
|
if (!ToInt32(gCx, v, &ret)) {
|
|
MOZ_CRASH("Must return an int32 compatible return value!");
|
|
}
|
|
|
|
return ret;
|
|
}
|