e1a7c1e76c
- New RelocInfo mode WASM_MEMORY_REFERENCE as a marker for wasm code objects that need to be relocated on a heap change - RelocInfo mode recorded for immediates that use the memory buffer as base - Tests to verify address patching works BUG= Committed: https://crrev.com/cc815b69c17da368107ed77306a5bb161170c834 Cr-Commit-Position: refs/heads/master@{#34831} Review URL: https://codereview.chromium.org/1759873002 Cr-Commit-Position: refs/heads/master@{#34836}
81 lines
2.2 KiB
C++
81 lines
2.2 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 <iostream> // NOLINT(readability/streams)
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#include "src/v8.h"
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#include "test/cctest/cctest.h"
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#include "src/arm/assembler-arm-inl.h"
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#include "src/arm/simulator-arm.h"
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#include "src/disassembler.h"
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#include "src/factory.h"
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#include "src/ostreams.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::base;
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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(WasmRelocationArm) {
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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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DummyStaticFunction(NULL);
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int32_t imm = 1234567;
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Assembler assm(isolate, buffer, sizeof buffer);
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__ mov(r0, Operand(imm, RelocInfo::WASM_MEMORY_REFERENCE));
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__ mov(pc, Operand(lr));
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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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CSignature0<int32_t> csig;
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CodeRunner<int32_t> runnable(isolate, code, &csig);
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int32_t ret_value = runnable.Call();
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CHECK_EQ(ret_value, imm);
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#ifdef DEBUG
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OFStream os(stdout);
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code->Print(os);
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::printf("f() = %d\n\n", ret_value);
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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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// Call into relocated code object
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ret_value = runnable.Call();
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CHECK_EQ((imm + offset), ret_value);
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#ifdef DEBUG
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code->Print(os);
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::printf("f() = %d\n\n", ret_value);
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#endif
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}
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#undef __
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