f4ba2a483e
Reason for revert: Blocks roll https://codereview.chromium.org/2148743003/ See https://build.chromium.org/p/tryserver.chromium.win/builders/win_chromium_x64_rel_ng/builds/244252/steps/compile%20%28with%20patch%29/logs/stdio for error message Original issue's description: > Reland Implement .eh_frame writer and disassembler. > > Original commit message: > > Also, CodeGenerator::MakeCodeEpilogue now accepts an optional pointer > to a EhFrameWriter and will attach unwinding information to the code > object when passed one. > > Reason for reverting: > > The STATIC_CONST_MEMBER_DEFINITION in eh-frame-writer-unittest.cc > causes a compiler error on V8 Win64 - clang buildbot. > > Removing that bit. > > BUG=v8:4899 > LOG=N > > Committed: https://crrev.com/b413f0ebe1a5dde016bfb94bb80bf872ebc24372 > Cr-Commit-Position: refs/heads/master@{#37707} TBR=rmcilroy@chromium.org,jarin@chromium.org,ssanfilippo@chromium.org # Skipping CQ checks because original CL landed less than 1 days ago. NOPRESUBMIT=true NOTREECHECKS=true NOTRY=true BUG=v8:4899 Review-Url: https://codereview.chromium.org/2147883003 Cr-Commit-Position: refs/heads/master@{#37717}
101 lines
3.4 KiB
C++
101 lines
3.4 KiB
C++
// Copyright 2016 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 "src/eh-frame.h"
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#include "src/objects.h"
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#include "test/cctest/cctest.h"
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using namespace v8::internal;
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TEST(EhFrameHdr) {
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CcTest::InitializeVM();
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HandleScope handle_scope(CcTest::i_isolate());
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// The content is not relevant in this test
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byte buffer[10] = {0};
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byte unwinding_info[30 + EhFrameHdr::kRecordSize] = {0};
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CodeDesc code_desc;
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code_desc.buffer = &buffer[0];
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code_desc.buffer_size = sizeof(buffer);
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code_desc.constant_pool_size = 0;
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code_desc.instr_size = sizeof(buffer);
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code_desc.reloc_size = 0;
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code_desc.origin = nullptr;
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code_desc.unwinding_info = &unwinding_info[0];
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code_desc.unwinding_info_size = sizeof(unwinding_info);
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Handle<Code> code = CcTest::i_isolate()->factory()->NewCode(
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code_desc, 0, Handle<Object>::null());
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EhFrameHdr eh_frame_hdr(*code);
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CHECK_EQ(eh_frame_hdr.lut_entries_number(), 1);
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//
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// Plugging some numbers in the DSO layout shown in eh-frame.cc:
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//
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// | ... |
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// +---------------+ <-- (E) --------
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// | | ^
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// | Instructions | 10 bytes | .text
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// | | v
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// +---------------+ <---------------
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// |///////////////|
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// |////Padding////| 6 bytes
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// |///////////////|
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// +---------------+ <---(D)---------
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// | | ^
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// | CIE | N bytes* |
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// | | |
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// +---------------+ <-- (C) | .eh_frame
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// | | |
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// | FDE | 30 - N bytes |
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// | | v
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// +---------------+ <-- (B) --------
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// | version | ^
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// +---------------+ 4 bytes |
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// | encoding | |
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// | specifiers | |
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// +---------------+ <---(A) | .eh_frame_hdr
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// | offset to | |
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// | .eh_frame | |
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// +---------------+ |
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// | ... | ...
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//
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// (*) the size of the CIE is platform dependent.
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//
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CHECK_EQ(eh_frame_hdr.offset_to_eh_frame(), -(4 + 30)); // A -> D
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CHECK_EQ(eh_frame_hdr.offset_to_procedure(), -(30 + 6 + 10)); // B -> E
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CHECK_EQ(eh_frame_hdr.offset_to_fde(),
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-(30 - EhFrameHdr::kCIESize)); // B -> C
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}
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TEST(DummyEhFrameHdr) {
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CcTest::InitializeVM();
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HandleScope handle_scope(CcTest::i_isolate());
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byte buffer[10] = {0}; // The content is not relevant in this test
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CodeDesc code_desc;
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code_desc.buffer = &buffer[0];
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code_desc.buffer_size = sizeof(buffer);
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code_desc.constant_pool_size = 0;
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code_desc.instr_size = sizeof(buffer);
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code_desc.reloc_size = 0;
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code_desc.origin = nullptr;
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code_desc.unwinding_info = nullptr;
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code_desc.unwinding_info_size = 0;
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Handle<Code> code = CcTest::i_isolate()->factory()->NewCode(
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code_desc, 0, Handle<Object>::null());
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EhFrameHdr eh_frame_hdr(*code);
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// A dummy header has an empty LUT
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CHECK_EQ(eh_frame_hdr.lut_entries_number(), 0);
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// These values should be irrelevant, but check that they have been zeroed.
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CHECK_EQ(eh_frame_hdr.offset_to_eh_frame(), 0);
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CHECK_EQ(eh_frame_hdr.offset_to_procedure(), 0);
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CHECK_EQ(eh_frame_hdr.offset_to_fde(), 0);
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}
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