v8/test/cctest/test-macro-assembler-arm64.cc

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#include <stdlib.h>

#include "src/base/platform/platform.h"
#include "src/codegen/arm64/assembler-arm64-inl.h"
#include "src/codegen/macro-assembler-inl.h"
#include "src/deoptimizer/deoptimizer.h"
#include "src/execution/simulator.h"
#include "src/heap/factory.h"
#include "src/init/v8.h"
#include "src/objects/objects-inl.h"
#include "src/objects/smi.h"
#include "src/utils/ostreams.h"
#include "test/cctest/cctest.h"
#include "test/common/assembler-tester.h"

namespace v8 {
namespace internal {
namespace test_macro_assembler_arm64 {

using F0 = int();

#define __ masm.

TEST(EmbeddedObj) {
#ifdef V8_COMPRESS_POINTERS
  Isolate* isolate = CcTest::i_isolate();
  HandleScope handles(isolate);

  auto buffer = AllocateAssemblerBuffer();
  MacroAssembler masm(isolate, v8::internal::CodeObjectRequired::kYes,
                      buffer->CreateView());

  Handle<HeapObject> old_array = isolate->factory()->NewFixedArray(2000);
  Handle<HeapObject> my_array = isolate->factory()->NewFixedArray(1000);
  __ Mov(w4, Immediate(my_array, RelocInfo::COMPRESSED_EMBEDDED_OBJECT));
  __ Mov(x5, old_array);
  __ ret(x5);

  CodeDesc desc;
  masm.GetCode(isolate, &desc);
  Handle<Code> code =
      Factory::CodeBuilder(isolate, desc, CodeKind::FOR_TESTING).Build();
#ifdef DEBUG
  StdoutStream os;
  code->Print(os);
#endif

  // Collect garbage to ensure reloc info can be walked by the heap.
  CcTest::CollectAllGarbage();
  CcTest::CollectAllGarbage();
  CcTest::CollectAllGarbage();

  // Test the user-facing reloc interface.
  const int mode_mask = RelocInfo::EmbeddedObjectModeMask();
  for (RelocIterator it(*code, mode_mask); !it.done(); it.next()) {
    RelocInfo::Mode mode = it.rinfo()->rmode();
    if (RelocInfo::IsCompressedEmbeddedObject(mode)) {
      CHECK_EQ(*my_array, it.rinfo()->target_object());
    } else {
      CHECK(RelocInfo::IsFullEmbeddedObject(mode));
      CHECK_EQ(*old_array, it.rinfo()->target_object());
    }
  }
#endif  // V8_COMPRESS_POINTERS
}

TEST(DeoptExitSizeIsFixed) {
  CHECK(Deoptimizer::kSupportsFixedDeoptExitSizes);

  Isolate* isolate = CcTest::i_isolate();
  HandleScope handles(isolate);
  auto buffer = AllocateAssemblerBuffer();
  MacroAssembler masm(isolate, v8::internal::CodeObjectRequired::kYes,
                      buffer->CreateView());

  STATIC_ASSERT(static_cast<int>(kFirstDeoptimizeKind) == 0);
  for (int i = 0; i < kDeoptimizeKindCount; i++) {
    DeoptimizeKind kind = static_cast<DeoptimizeKind>(i);
    Label before_exit;
    if (kind == DeoptimizeKind::kEagerWithResume) {
      masm.bind(&before_exit);
      Builtins::Name target = Deoptimizer::GetDeoptWithResumeBuiltin(
          DeoptimizeReason::kDynamicCheckMaps);
      masm.CallForDeoptimization(target, 42, &before_exit, kind, &before_exit,
                                 &before_exit);
      CHECK_EQ(masm.SizeOfCodeGeneratedSince(&before_exit),
               Deoptimizer::kEagerWithResumeBeforeArgsSize);
    } else {
      Builtins::Name target = Deoptimizer::GetDeoptimizationEntry(kind);
      // Mirroring logic in code-generator.cc.
      if (kind == DeoptimizeKind::kLazy) {
        // CFI emits an extra instruction here.
        masm.BindExceptionHandler(&before_exit);
      } else {
        masm.bind(&before_exit);
      }
      masm.CallForDeoptimization(target, 42, &before_exit, kind, &before_exit,
                                 &before_exit);
      CHECK_EQ(masm.SizeOfCodeGeneratedSince(&before_exit),
               kind == DeoptimizeKind::kLazy
                   ? Deoptimizer::kLazyDeoptExitSize
                   : Deoptimizer::kNonLazyDeoptExitSize);
    }
  }
}

#undef __

}  // namespace test_macro_assembler_arm64
}  // namespace internal
}  // namespace v8