7b29fe434d
In order to clarify the difference between, e.g., InstructionStart and instruction_start, rename as follows: Code::instruction_start -> raw_instruction_start Code::instruction_end -> raw_instruction_end Code::instruction_size -> raw_instruction_size The difference between the camel-case and raw_* function families is in how they handle off-heap-trampoline Code objects. For example, when called on an off-heap-trampoline: raw_instruction_start returns the trampoline's entry point, while InstructionStart returns the off-heap code's entry point (located in the .text section of the binary). Some callsites were updated to call the camel-case function family as appropriate. Bug: v8:6666 Change-Id: I4a572f47c2d161a853599d7c17879e263b0d1a87 Reviewed-on: https://chromium-review.googlesource.com/997532 Commit-Queue: Jakob Gruber <jgruber@chromium.org> Reviewed-by: Michael Starzinger <mstarzinger@chromium.org> Cr-Commit-Position: refs/heads/master@{#52387}
87 lines
2.4 KiB
C++
87 lines
2.4 KiB
C++
// Copyright 2015 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 <stdlib.h>
|
|
|
|
#include "src/v8.h"
|
|
|
|
#include "src/debug/debug.h"
|
|
#include "src/disasm.h"
|
|
#include "src/disassembler.h"
|
|
#include "src/ic/ic.h"
|
|
#include "src/macro-assembler.h"
|
|
#include "src/objects-inl.h"
|
|
#include "src/ostreams.h"
|
|
#include "test/cctest/cctest.h"
|
|
#include "test/cctest/compiler/c-signature.h"
|
|
#include "test/cctest/compiler/call-tester.h"
|
|
|
|
namespace v8 {
|
|
namespace internal {
|
|
namespace compiler {
|
|
|
|
#define __ assm.
|
|
|
|
static int32_t DummyStaticFunction(Object* result) { return 1; }
|
|
|
|
TEST(WasmRelocationX64ContextReference) {
|
|
Isolate* isolate = CcTest::i_isolate();
|
|
HandleScope scope(isolate);
|
|
v8::internal::byte buffer[4096];
|
|
Assembler assm(isolate, buffer, sizeof buffer);
|
|
DummyStaticFunction(nullptr);
|
|
int64_t imm = 1234567;
|
|
|
|
__ movq(rax, imm, RelocInfo::WASM_CONTEXT_REFERENCE);
|
|
__ nop();
|
|
__ ret(0);
|
|
|
|
CodeDesc desc;
|
|
assm.GetCode(isolate, &desc);
|
|
Handle<Code> code =
|
|
isolate->factory()->NewCode(desc, Code::STUB, Handle<Code>());
|
|
USE(code);
|
|
|
|
CSignatureOf<int64_t> csig;
|
|
CodeRunner<int64_t> runnable(isolate, code, &csig);
|
|
int64_t ret_value = runnable.Call();
|
|
CHECK_EQ(ret_value, imm);
|
|
|
|
#ifdef OBJECT_PRINT
|
|
OFStream os(stdout);
|
|
code->Print(os);
|
|
byte* begin = code->raw_instruction_start();
|
|
byte* end = begin + code->raw_instruction_size();
|
|
disasm::Disassembler::Disassemble(stdout, begin, end);
|
|
#endif
|
|
int offset = 1234;
|
|
|
|
// Relocating references by offset
|
|
int mode_mask = (1 << RelocInfo::WASM_CONTEXT_REFERENCE);
|
|
for (RelocIterator it(*code, mode_mask); !it.done(); it.next()) {
|
|
// TODO(6792): No longer needed once WebAssembly code is off heap.
|
|
CodeSpaceMemoryModificationScope modification_scope(isolate->heap());
|
|
DCHECK(RelocInfo::IsWasmContextReference(it.rinfo()->rmode()));
|
|
it.rinfo()->set_wasm_context_reference(
|
|
it.rinfo()->wasm_context_reference() + offset, SKIP_ICACHE_FLUSH);
|
|
}
|
|
|
|
// Check if immediate is updated correctly
|
|
ret_value = runnable.Call();
|
|
CHECK_EQ(ret_value, imm + offset);
|
|
|
|
#ifdef OBJECT_PRINT
|
|
code->Print(os);
|
|
begin = code->raw_instruction_start();
|
|
end = begin + code->raw_instruction_size();
|
|
disasm::Disassembler::Disassemble(stdout, begin, end);
|
|
#endif
|
|
}
|
|
|
|
#undef __
|
|
|
|
} // namespace compiler
|
|
} // namespace internal
|
|
} // namespace v8
|