52148c41c9
Add relocatable pointers for wasm memory references that need to be updated when wasm GrowMemory is used. Code generator changes to accept relocatable constants as immediates. R=titzer@chromium.org, yangguo@chromium.org, bradnelson@chromium.org Committed: https://crrev.com/eb5fe0df64ec0add423b2a1f6fb62d5a33dce2a5 Cr-Commit-Position: refs/heads/master@{#35182} Committed: https://crrev.com/297932a302ce0b73c3618ef9e4eba9d9d241f2b3 Cr-Commit-Position: refs/heads/master@{#35400} Review URL: https://codereview.chromium.org/1759383003 Cr-Commit-Position: refs/heads/master@{#35407}
85 lines
2.4 KiB
C++
85 lines
2.4 KiB
C++
// Copyright 2015 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include <stdlib.h>
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#include "src/v8.h"
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#include "src/debug/debug.h"
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#include "src/disasm.h"
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#include "src/disassembler.h"
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#include "src/ic/ic.h"
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#include "src/macro-assembler.h"
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#include "test/cctest/cctest.h"
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#include "test/cctest/compiler/c-signature.h"
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#include "test/cctest/compiler/call-tester.h"
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using namespace v8::internal;
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using namespace v8::internal::compiler;
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#define __ assm.
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static int32_t DummyStaticFunction(Object* result) { return 1; }
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TEST(WasmRelocationX64movq64) {
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CcTest::InitializeVM();
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Isolate* isolate = CcTest::i_isolate();
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HandleScope scope(isolate);
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v8::internal::byte buffer[4096];
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Assembler assm(isolate, buffer, sizeof buffer);
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DummyStaticFunction(NULL);
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int64_t imm = 1234567;
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__ movq(rax, imm, RelocInfo::WASM_MEMORY_REFERENCE);
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__ nop();
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__ ret(0);
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CodeDesc desc;
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assm.GetCode(&desc);
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Handle<Code> code = isolate->factory()->NewCode(
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desc, Code::ComputeFlags(Code::STUB), Handle<Code>());
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USE(code);
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CSignature0<int64_t> csig;
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CodeRunner<int64_t> runnable(isolate, code, &csig);
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int64_t ret_value = runnable.Call();
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CHECK_EQ(ret_value, imm);
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#ifdef OBJECT_PRINT
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OFStream os(stdout);
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code->Print(os);
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byte* begin = code->instruction_start();
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byte* end = begin + code->instruction_size();
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disasm::Disassembler::Disassemble(stdout, begin, end);
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#endif
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size_t offset = 1234;
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// Relocating references by offset
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int mode_mask = (1 << RelocInfo::WASM_MEMORY_REFERENCE);
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for (RelocIterator it(*code, mode_mask); !it.done(); it.next()) {
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RelocInfo::Mode mode = it.rinfo()->rmode();
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if (RelocInfo::IsWasmMemoryReference(mode)) {
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// Dummy values of size used here as the objective of the test is to
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// verify that the immediate is patched correctly
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it.rinfo()->update_wasm_memory_reference(
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it.rinfo()->wasm_memory_reference(),
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it.rinfo()->wasm_memory_reference() + offset, 1, 2,
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SKIP_ICACHE_FLUSH);
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}
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}
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// Check if immediate is updated correctly
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ret_value = runnable.Call();
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CHECK_EQ(ret_value, imm + offset);
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#ifdef OBJECT_PRINT
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code->Print(os);
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begin = code->instruction_start();
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end = begin + code->instruction_size();
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disasm::Disassembler::Disassemble(stdout, begin, end);
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#endif
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}
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#undef __
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