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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/api/api-inl.h"
#include "src/codegen/assembler-inl.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"
#include "test/common/wasm/wasm-macro-gen.h"
namespace v8 {
namespace internal {
namespace wasm {
namespace test_wasm_stack {
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)) { \
FATAL("Check failed: (%s) != (%s) ('%s' vs '%s').", #exp, #found, exp_, \
found_ ? found_ : "<null>"); \
} \
} while (false)
void PrintStackTrace(v8::Isolate* isolate, 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(isolate, 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(isolate, script),
func.IsEmpty() ? "<null>" : *v8::String::Utf8Value(isolate, func),
frame->GetLineNumber(), frame->GetColumn());
}
}
struct ExceptionInfo {
const char* func_name;
int line_nr; // 1-based
int column; // 1-based
};
template <int N>
void CheckExceptionInfos(v8::internal::Isolate* i_isolate, Handle<Object> exc,
const ExceptionInfo (&excInfos)[N]) {
// Check that it's indeed an Error object.
CHECK(exc->IsJSError());
v8::Isolate* v8_isolate = reinterpret_cast<v8::Isolate*>(i_isolate);
// Extract stack frame from the exception.
Local<v8::Value> localExc = Utils::ToLocal(exc);
v8::Local<v8::StackTrace> stack = v8::Exception::GetStackTrace(localExc);
PrintStackTrace(v8_isolate, stack);
CHECK(!stack.IsEmpty());
CHECK_EQ(N, stack->GetFrameCount());
for (int frameNr = 0; frameNr < N; ++frameNr) {
v8::Local<v8::StackFrame> frame = stack->GetFrame(v8_isolate, frameNr);
v8::String::Utf8Value funName(v8_isolate, frame->GetFunctionName());
CHECK_CSTREQ(excInfos[frameNr].func_name, *funName);
// Line and column are 1-based in v8::StackFrame, just as in ExceptionInfo.
CHECK_EQ(excInfos[frameNr].line_nr, frame->GetLineNumber());
CHECK_EQ(excInfos[frameNr].column, frame->GetColumn());
}
CheckComputeLocation(i_isolate, exc, excInfos[0]);
}
void CheckComputeLocation(v8::internal::Isolate* i_isolate, Handle<Object> exc,
const ExceptionInfo& topLocation) {
MessageLocation loc;
CHECK(i_isolate->ComputeLocationFromStackTrace(&loc, exc));
printf("loc start: %d, end: %d\n", loc.start_pos(), loc.end_pos());
Handle<JSMessageObject> message = i_isolate->CreateMessage(exc, nullptr);
printf("msg start: %d, end: %d, line: %d, col: %d\n",
message->GetStartPosition(), message->GetEndPosition(),
message->GetLineNumber(), message->GetColumnNumber());
CHECK_EQ(loc.start_pos(), message->GetStartPosition());
CHECK_EQ(loc.end_pos(), message->GetEndPosition());
// In the message, the line is 1-based, but the column is 0-based.
CHECK_EQ(topLocation.line_nr, message->GetLineNumber());
CHECK_LE(1, topLocation.column);
// TODO(szuend): Remove or re-enable the following check once it is decided
// whether Script::PositionInfo.column should be the offset
// relative to the module or relative to the function.
// CHECK_EQ(topLocation.column - 1, message->GetColumnNumber());
}
#undef CHECK_CSTREQ
} // namespace
// Call from JS to wasm to JS and throw an Error from JS.
WASM_EXEC_TEST(CollectDetailedWasmStack_ExplicitThrowFromJs) {
TestSignatures sigs;
HandleScope scope(CcTest::InitIsolateOnce());
const char* source =
"(function js() {\n function a() {\n throw new Error(); };\n a(); })";
Handle<JSFunction> js_function =
Handle<JSFunction>::cast(v8::Utils::OpenHandle(
*v8::Local<v8::Function>::Cast(CompileRun(source))));
ManuallyImportedJSFunction import = {sigs.v_v(), js_function};
uint32_t js_throwing_index = 0;
WasmRunner<void> r(execution_tier, &import);
// Add a nop such that we don't always get position 1.
BUILD(r, WASM_NOP, WASM_CALL_FUNCTION0(js_throwing_index));
uint32_t wasm_index_1 = r.function()->func_index;
WasmFunctionCompiler& f2 = r.NewFunction<void>("call_main");
BUILD(f2, WASM_CALL_FUNCTION0(wasm_index_1));
uint32_t wasm_index_2 = f2.function_index();
Handle<JSFunction> js_wasm_wrapper = r.builder().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,
Execution::MessageHandling::kReport, &maybe_exc);
CHECK(returnObjMaybe.is_null());
ExceptionInfo expected_exceptions[] = {
{"a", 3, 8}, // -
{"js", 4, 2}, // -
{"main", 1, 8}, // -
{"call_main", 1, 21}, // -
{"callFn", 1, 24} // -
};
CheckExceptionInfos(isolate, maybe_exc.ToHandleChecked(),
expected_exceptions);
}
// Trigger a trap in wasm, stack should be JS -> wasm -> wasm.
WASM_EXEC_TEST(CollectDetailedWasmStack_WasmError) {
for (int pos_shift = 0; pos_shift < 3; ++pos_shift) {
// Test a position with 1, 2 or 3 bytes needed to represent it.
int unreachable_pos = 1 << (8 * pos_shift);
TestSignatures sigs;
// Create a WasmRunner with stack checks and traps enabled.
WasmRunner<int> r(execution_tier, nullptr, "main",
kRuntimeExceptionSupport);
std::vector<byte> code(unreachable_pos + 1, kExprNop);
code[unreachable_pos] = kExprUnreachable;
r.Build(code.data(), code.data() + code.size());
uint32_t wasm_index_1 = r.function()->func_index;
WasmFunctionCompiler& f2 = r.NewFunction<int>("call_main");
BUILD(f2, WASM_CALL_FUNCTION0(0));
uint32_t wasm_index_2 = f2.function_index();
Handle<JSFunction> js_wasm_wrapper = r.builder().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,
Execution::MessageHandling::kReport, &maybe_exc);
CHECK(maybe_return_obj.is_null());
Handle<Object> exception = maybe_exc.ToHandleChecked();
static constexpr int kMainLocalsLength = 1;
const int main_offset =
r.builder().GetFunctionAt(wasm_index_1)->code.offset();
const int call_main_offset =
r.builder().GetFunctionAt(wasm_index_2)->code.offset();
// Column is 1-based, so add 1 for the expected wasm output. Line number
// is always 1.
const int expected_main_pos =
unreachable_pos + main_offset + kMainLocalsLength + 1;
const int expected_call_main_pos = call_main_offset + kMainLocalsLength + 1;
ExceptionInfo expected_exceptions[] = {
{"main", 1, expected_main_pos}, // -
{"call_main", 1, expected_call_main_pos}, // -
{"callFn", 1, 24} //-
};
CheckExceptionInfos(isolate, exception, expected_exceptions);
}
}
} // namespace test_wasm_stack
} // namespace wasm
} // namespace internal
} // namespace v8
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