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// Copyright 2016 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 "src/wasm/wasm-macro-gen.h"
#include "test/cctest/cctest.h"
#include "test/cctest/compiler/value-helper.h"
#include "test/cctest/wasm/wasm-run-utils.h"
#include "test/common/wasm/test-signatures.h"
using namespace v8::base;
using namespace v8::internal;
using namespace v8::internal::compiler;
using namespace v8::internal::wasm;
using v8::Local;
using v8::Utils;
namespace {
#define CHECK_CSTREQ(exp, found) \
do { \
const char* exp_ = (exp); \
const char* found_ = (found); \
DCHECK_NOT_NULL(exp); \
if (V8_UNLIKELY(found_ == nullptr || strcmp(exp_, found_) != 0)) { \
V8_Fatal(__FILE__, __LINE__, \
"Check failed: (%s) != (%s) ('%s' vs '%s').", #exp, #found, \
exp_, found_ ? found_ : "<null>"); \
} \
} while (0)
void PrintStackTrace(v8::Local<v8::StackTrace> stack) {
printf("Stack Trace (length %d):\n", stack->GetFrameCount());
for (int i = 0, e = stack->GetFrameCount(); i != e; ++i) {
v8::Local<v8::StackFrame> frame = stack->GetFrame(i);
v8::Local<v8::String> script = frame->GetScriptName();
v8::Local<v8::String> func = frame->GetFunctionName();
printf("[%d] (%s) %s:%d:%d\n", i,
script.IsEmpty() ? "<null>" : *v8::String::Utf8Value(script),
func.IsEmpty() ? "<null>" : *v8::String::Utf8Value(func),
frame->GetLineNumber(), frame->GetColumn());
}
}
struct ExceptionInfo {
const char* func_name;
int line_nr;
int column;
};
template <int N>
void CheckExceptionInfos(Handle<Object> exc,
const ExceptionInfo (&excInfos)[N]) {
// Check that it's indeed an Error object.
CHECK(exc->IsJSError());
// Extract stack frame from the exception.
Local<v8::Value> localExc = Utils::ToLocal(exc);
v8::Local<v8::StackTrace> stack = v8::Exception::GetStackTrace(localExc);
PrintStackTrace(stack);
CHECK(!stack.IsEmpty());
CHECK_EQ(N, stack->GetFrameCount());
for (int frameNr = 0; frameNr < N; ++frameNr) {
v8::Local<v8::StackFrame> frame = stack->GetFrame(frameNr);
v8::String::Utf8Value funName(frame->GetFunctionName());
CHECK_CSTREQ(excInfos[frameNr].func_name, *funName);
CHECK_EQ(excInfos[frameNr].line_nr, frame->GetLineNumber());
CHECK_EQ(excInfos[frameNr].column, frame->GetColumn());
}
}
} // namespace
// Call from JS to WASM to JS and throw an Error from JS.
TEST(CollectDetailedWasmStack_ExplicitThrowFromJs) {
TestSignatures sigs;
TestingModule module;
// Initialize WasmFunctionCompiler first, since it sets up the HandleScope.
WasmFunctionCompiler comp1(sigs.v_v(), &module);
uint32_t js_throwing_index = module.AddJsFunction(
sigs.v_v(),
"(function js() {\n function a() {\n throw new Error(); };\n a(); })");
// Add a nop such that we don't always get position 1.
BUILD(comp1, WASM_NOP, WASM_CALL_FUNCTION0(js_throwing_index));
uint32_t wasm_index = comp1.CompileAndAdd();
WasmFunctionCompiler comp2(sigs.v_v(), &module);
BUILD(comp2, WASM_CALL_FUNCTION0(wasm_index));
uint32_t wasm_index_2 = comp2.CompileAndAdd();
Handle<JSFunction> js_wasm_wrapper = module.WrapCode(wasm_index_2);
Handle<JSFunction> js_trampoline = Handle<JSFunction>::cast(
v8::Utils::OpenHandle(*v8::Local<v8::Function>::Cast(
CompileRun("(function callFn(fn) { fn(); })"))));
Isolate* isolate = js_wasm_wrapper->GetIsolate();
isolate->SetCaptureStackTraceForUncaughtExceptions(true, 10,
v8::StackTrace::kOverview);
Handle<Object> global(isolate->context()->global_object(), isolate);
MaybeHandle<Object> maybe_exc;
Handle<Object> args[] = {js_wasm_wrapper};
MaybeHandle<Object> returnObjMaybe =
Execution::TryCall(isolate, js_trampoline, global, 1, args, &maybe_exc);
CHECK(returnObjMaybe.is_null());
// The column is 1-based, so add 1 to the actual byte offset.
ExceptionInfo expected_exceptions[] = {
{"a", 3, 8}, // -
{"js", 4, 2}, // -
{"<WASM UNNAMED>", static_cast<int>(wasm_index), 3}, // -
{"<WASM UNNAMED>", static_cast<int>(wasm_index_2), 2}, // -
{"callFn", 1, 24} // -
};
CheckExceptionInfos(maybe_exc.ToHandleChecked(), expected_exceptions);
}
// Trigger a trap in WASM, stack should be JS -> WASM -> WASM.
TEST(CollectDetailedWasmStack_WasmError) {
TestSignatures sigs;
TestingModule module;
WasmFunctionCompiler comp1(sigs.i_v(), &module,
ArrayVector("exec_unreachable"));
// Set the execution context, such that a runtime error can be thrown.
comp1.SetModuleContext();
BUILD(comp1, WASM_UNREACHABLE);
uint32_t wasm_index = comp1.CompileAndAdd();
WasmFunctionCompiler comp2(sigs.i_v(), &module,
ArrayVector("call_exec_unreachable"));
BUILD(comp2, WASM_CALL_FUNCTION0(wasm_index));
uint32_t wasm_index_2 = comp2.CompileAndAdd();
Handle<JSFunction> js_wasm_wrapper = module.WrapCode(wasm_index_2);
Handle<JSFunction> js_trampoline = Handle<JSFunction>::cast(
v8::Utils::OpenHandle(*v8::Local<v8::Function>::Cast(
CompileRun("(function callFn(fn) { fn(); })"))));
Isolate* isolate = js_wasm_wrapper->GetIsolate();
isolate->SetCaptureStackTraceForUncaughtExceptions(true, 10,
v8::StackTrace::kOverview);
Handle<Object> global(isolate->context()->global_object(), isolate);
MaybeHandle<Object> maybe_exc;
Handle<Object> args[] = {js_wasm_wrapper};
MaybeHandle<Object> maybe_return_obj =
Execution::TryCall(isolate, js_trampoline, global, 1, args, &maybe_exc);
CHECK(maybe_return_obj.is_null());
// The column is 1-based, so add 1 to the actual byte offset.
ExceptionInfo expected_exceptions[] = {
{"<WASM UNNAMED>", static_cast<int>(wasm_index), 2}, // -
{"<WASM UNNAMED>", static_cast<int>(wasm_index_2), 2}, // -
{"callFn", 1, 24} //-
};
CheckExceptionInfos(maybe_exc.ToHandleChecked(), expected_exceptions);
}
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