1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
|
// Copyright 2017 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <limits.h>
#include <stddef.h>
#include <stdint.h>
#include "include/v8.h"
#include "src/api.h"
#include "src/factory.h"
#include "src/isolate-inl.h"
#include "src/isolate.h"
#include "src/objects-inl.h"
#include "src/objects.h"
#include "src/wasm/wasm-engine.h"
#include "src/wasm/wasm-module.h"
#include "test/common/wasm/flag-utils.h"
#include "test/common/wasm/wasm-module-runner.h"
#include "test/fuzzer/fuzzer-support.h"
#include "test/fuzzer/wasm-fuzzer-common.h"
namespace v8 {
namespace internal {
class WasmModuleObject;
namespace wasm {
namespace fuzzer {
#define ASSIGN(type, var, expr) \
v8::Local<type> var; \
do { \
if (!expr.ToLocal(&var)) { \
DCHECK(i_isolate->has_scheduled_exception()); \
return 0; \
} else { \
DCHECK(!i_isolate->has_scheduled_exception()); \
} \
} while (false)
namespace {
// We need this helper function because we cannot use
// Handle<WasmModuleObject>::cast here. To use this function we would have to
// mark it with V8_EXPORT_PRIVATE, which is quite ugly in this case.
Handle<WasmModuleObject> ToWasmModuleObjectUnchecked(Handle<Object> that) {
return handle(reinterpret_cast<WasmModuleObject*>(*that));
}
}
void InstantiateCallback(const FunctionCallbackInfo<Value>& args) {
DCHECK_GE(args.Length(), 1);
v8::Isolate* isolate = args.GetIsolate();
MicrotasksScope does_not_run_microtasks(
isolate, v8::MicrotasksScope::kDoNotRunMicrotasks);
v8::HandleScope scope(isolate);
Local<v8::Value> module = args[0];
i::Isolate* i_isolate = reinterpret_cast<i::Isolate*>(isolate);
Handle<WasmModuleObject> module_obj =
ToWasmModuleObjectUnchecked(Utils::OpenHandle(v8::Object::Cast(*module)));
InterpretAndExecuteModule(i_isolate, module_obj);
}
extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
FlagScope<bool> turn_on_async_compile(
&v8::internal::FLAG_wasm_async_compilation, true);
FlagScope<uint32_t> max_mem_flag_scope(&v8::internal::FLAG_wasm_max_mem_pages,
32);
FlagScope<uint32_t> max_table_size_scope(
&v8::internal::FLAG_wasm_max_table_size, 100);
v8_fuzzer::FuzzerSupport* support = v8_fuzzer::FuzzerSupport::Get();
v8::Isolate* isolate = support->GetIsolate();
i::Isolate* i_isolate = reinterpret_cast<v8::internal::Isolate*>(isolate);
// Clear any pending exceptions from a prior run.
if (i_isolate->has_pending_exception()) {
i_isolate->clear_pending_exception();
}
v8::Isolate::Scope isolate_scope(isolate);
v8::HandleScope handle_scope(isolate);
i::HandleScope internal_scope(i_isolate);
v8::Context::Scope context_scope(support->GetContext());
TryCatch try_catch(isolate);
testing::SetupIsolateForWasmModule(i_isolate);
// Get the promise for async compilation.
ASSIGN(Promise::Resolver, resolver,
Promise::Resolver::New(support->GetContext()));
Local<Promise> promise = resolver->GetPromise();
i_isolate->wasm_engine()->AsyncCompile(i_isolate, Utils::OpenHandle(*promise),
ModuleWireBytes(data, data + size),
false);
ASSIGN(Function, instantiate_impl,
Function::New(support->GetContext(), &InstantiateCallback,
Undefined(isolate)));
ASSIGN(Promise, result,
promise->Then(support->GetContext(), instantiate_impl));
// Wait for the promise to resolve.
while (result->State() == Promise::kPending) {
support->PumpMessageLoop(platform::MessageLoopBehavior::kWaitForWork);
isolate->RunMicrotasks();
}
return 0;
}
#undef ASSIGN
} // namespace fuzzer
} // namespace wasm
} // namespace internal
} // namespace v8
|
