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// 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 <cstdint>
#include "src/assembler-inl.h"
#include "src/objects-inl.h"
#include "src/wasm/wasm-objects.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/wasm-macro-gen.h"
namespace v8 {
namespace internal {
namespace wasm {
/**
* We test the interface from C to compiled wasm code by generating a wasm
* function, creating a corresponding signature, compiling the c wasm entry for
* that signature, and then calling that entry using different test values.
* The result is compared against the expected result, computed from a lambda
* passed to the CWasmEntryArgTester.
*/
namespace {
template <typename ReturnType, typename... Args>
class CWasmEntryArgTester {
public:
CWasmEntryArgTester(std::initializer_list<uint8_t> wasm_function_bytes,
std::function<ReturnType(Args...)> expected_fn)
: runner_(ExecutionTier::kOptimized),
isolate_(runner_.main_isolate()),
expected_fn_(expected_fn),
sig_(runner_.template CreateSig<ReturnType, Args...>()) {
std::vector<uint8_t> code{wasm_function_bytes};
runner_.Build(code.data(), code.data() + code.size());
wasm_code_ = runner_.builder().GetFunctionCode(0);
Handle<WasmInstanceObject> instance(runner_.builder().instance_object());
Handle<WasmDebugInfo> debug_info =
WasmInstanceObject::GetOrCreateDebugInfo(instance);
c_wasm_entry_fn_ = WasmDebugInfo::GetCWasmEntry(debug_info, sig_);
}
template <typename... Rest>
void WriteToBuffer(Address buf, Rest... rest) {
static_assert(sizeof...(rest) == 0, "this is the base case");
}
template <typename First, typename... Rest>
void WriteToBuffer(Address buf, First first, Rest... rest) {
WriteUnalignedValue(buf, first);
WriteToBuffer(buf + sizeof(first), rest...);
}
void CheckCall(Args... args) {
std::vector<uint8_t> arg_buffer(sizeof...(args) * 8);
WriteToBuffer(reinterpret_cast<Address>(arg_buffer.data()), args...);
Handle<Object> receiver = isolate_->factory()->undefined_value();
Handle<Object> buffer_obj(reinterpret_cast<Object*>(arg_buffer.data()),
isolate_);
CHECK(!buffer_obj->IsHeapObject());
Handle<Object> code_entry_obj(
reinterpret_cast<Object*>(wasm_code_->instruction_start()), isolate_);
CHECK(!code_entry_obj->IsHeapObject());
Handle<Object> call_args[]{code_entry_obj,
runner_.builder().instance_object(), buffer_obj};
static_assert(
arraysize(call_args) == compiler::CWasmEntryParameters::kNumParameters,
"adapt this test");
wasm_code_->native_module()->SetExecutable(true);
MaybeHandle<Object> return_obj = Execution::Call(
isolate_, c_wasm_entry_fn_, receiver, arraysize(call_args), call_args);
CHECK(!return_obj.is_null());
CHECK(return_obj.ToHandleChecked()->IsSmi());
CHECK_EQ(0, Smi::ToInt(*return_obj.ToHandleChecked()));
// Check the result.
ReturnType result = ReadUnalignedValue<ReturnType>(
reinterpret_cast<Address>(arg_buffer.data()));
ReturnType expected = expected_fn_(args...);
if (std::is_floating_point<ReturnType>::value) {
CHECK_DOUBLE_EQ(expected, result);
} else {
CHECK_EQ(expected, result);
}
}
private:
WasmRunner<ReturnType, Args...> runner_;
Isolate* isolate_;
std::function<ReturnType(Args...)> expected_fn_;
FunctionSig* sig_;
Handle<JSFunction> c_wasm_entry_fn_;
WasmCode* wasm_code_;
};
} // namespace
// Pass int32_t, return int32_t.
TEST(TestCWasmEntryArgPassing_int32) {
CWasmEntryArgTester<int32_t, int32_t> tester(
{// Return 2*<0> + 1.
WASM_I32_ADD(WASM_I32_MUL(WASM_I32V_1(2), WASM_GET_LOCAL(0)), WASM_ONE)},
[](int32_t a) { return 2 * a + 1; });
FOR_INT32_INPUTS(v) { tester.CheckCall(*v); }
}
// Pass int64_t, return double.
TEST(TestCWasmEntryArgPassing_double_int64) {
CWasmEntryArgTester<double, int64_t> tester(
{// Return (double)<0>.
WASM_F64_SCONVERT_I64(WASM_GET_LOCAL(0))},
[](int64_t a) { return static_cast<double>(a); });
FOR_INT64_INPUTS(v) { tester.CheckCall(*v); }
}
// Pass double, return int64_t.
TEST(TestCWasmEntryArgPassing_int64_double) {
CWasmEntryArgTester<int64_t, double> tester(
{// Return (int64_t)<0>.
WASM_I64_SCONVERT_F64(WASM_GET_LOCAL(0))},
[](double d) { return static_cast<int64_t>(d); });
FOR_INT64_INPUTS(i) { tester.CheckCall(*i); }
}
// Pass float, return double.
TEST(TestCWasmEntryArgPassing_float_double) {
CWasmEntryArgTester<double, float> tester(
{// Return 2*(double)<0> + 1.
WASM_F64_ADD(
WASM_F64_MUL(WASM_F64(2), WASM_F64_CONVERT_F32(WASM_GET_LOCAL(0))),
WASM_F64(1))},
[](float f) { return 2. * static_cast<double>(f) + 1.; });
FOR_FLOAT32_INPUTS(f) { tester.CheckCall(*f); }
}
// Pass two doubles, return double.
TEST(TestCWasmEntryArgPassing_double_double) {
CWasmEntryArgTester<double, double, double> tester(
{// Return <0> + <1>.
WASM_F64_ADD(WASM_GET_LOCAL(0), WASM_GET_LOCAL(1))},
[](double a, double b) { return a + b; });
FOR_FLOAT64_INPUTS(d1) {
FOR_FLOAT64_INPUTS(d2) { tester.CheckCall(*d1, *d2); }
}
}
// Pass int32_t, int64_t, float and double, return double.
TEST(TestCWasmEntryArgPassing_AllTypes) {
CWasmEntryArgTester<double, int32_t, int64_t, float, double> tester(
{
// Convert all arguments to double, add them and return the sum.
WASM_F64_ADD( // <0+1+2> + <3>
WASM_F64_ADD( // <0+1> + <2>
WASM_F64_ADD( // <0> + <1>
WASM_F64_SCONVERT_I32(
WASM_GET_LOCAL(0)), // <0> to double
WASM_F64_SCONVERT_I64(
WASM_GET_LOCAL(1))), // <1> to double
WASM_F64_CONVERT_F32(WASM_GET_LOCAL(2))), // <2> to double
WASM_GET_LOCAL(3)) // <3>
},
[](int32_t a, int64_t b, float c, double d) {
return 0. + a + b + c + d;
});
Vector<const int32_t> test_values_i32 = compiler::ValueHelper::int32_vector();
Vector<const int64_t> test_values_i64 = compiler::ValueHelper::int64_vector();
Vector<const float> test_values_f32 = compiler::ValueHelper::float32_vector();
Vector<const double> test_values_f64 =
compiler::ValueHelper::float64_vector();
size_t max_len =
std::max(std::max(test_values_i32.size(), test_values_i64.size()),
std::max(test_values_f32.size(), test_values_f64.size()));
for (size_t i = 0; i < max_len; ++i) {
int32_t i32 = test_values_i32[i % test_values_i32.size()];
int64_t i64 = test_values_i64[i % test_values_i64.size()];
float f32 = test_values_f32[i % test_values_f32.size()];
double f64 = test_values_f64[i % test_values_f64.size()];
tester.CheckCall(i32, i64, f32, f64);
}
}
} // namespace wasm
} // namespace internal
} // namespace v8
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