| // Copyright 2016 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 "src/eh-frame.h" |
| #include "src/objects.h" |
| #include "test/cctest/cctest.h" |
| |
| using namespace v8::internal; |
| |
| TEST(EhFrameHdr) { |
| CcTest::InitializeVM(); |
| HandleScope handle_scope(CcTest::i_isolate()); |
| |
| // The content is not relevant in this test |
| byte buffer[10] = {0}; |
| byte unwinding_info[30 + EhFrameHdr::kRecordSize] = {0}; |
| |
| CodeDesc code_desc; |
| code_desc.buffer = &buffer[0]; |
| code_desc.buffer_size = sizeof(buffer); |
| code_desc.constant_pool_size = 0; |
| code_desc.instr_size = sizeof(buffer); |
| code_desc.reloc_size = 0; |
| code_desc.origin = nullptr; |
| code_desc.unwinding_info = &unwinding_info[0]; |
| code_desc.unwinding_info_size = sizeof(unwinding_info); |
| |
| Handle<Code> code = CcTest::i_isolate()->factory()->NewCode( |
| code_desc, 0, Handle<Object>::null()); |
| |
| EhFrameHdr eh_frame_hdr(*code); |
| CHECK_EQ(eh_frame_hdr.lut_entries_number(), 1); |
| |
| // |
| // Plugging some numbers in the DSO layout shown in eh-frame.cc: |
| // |
| // | ... | |
| // +---------------+ <-- (E) -------- |
| // | | ^ |
| // | Instructions | 10 bytes | .text |
| // | | v |
| // +---------------+ <--------------- |
| // |///////////////| |
| // |////Padding////| 6 bytes |
| // |///////////////| |
| // +---------------+ <---(D)--------- |
| // | | ^ |
| // | CIE | N bytes* | |
| // | | | |
| // +---------------+ <-- (C) | .eh_frame |
| // | | | |
| // | FDE | 30 - N bytes | |
| // | | v |
| // +---------------+ <-- (B) -------- |
| // | version | ^ |
| // +---------------+ 4 bytes | |
| // | encoding | | |
| // | specifiers | | |
| // +---------------+ <---(A) | .eh_frame_hdr |
| // | offset to | | |
| // | .eh_frame | | |
| // +---------------+ | |
| // | ... | ... |
| // |
| // (*) the size of the CIE is platform dependent. |
| // |
| CHECK_EQ(eh_frame_hdr.offset_to_eh_frame(), -(4 + 30)); // A -> D |
| CHECK_EQ(eh_frame_hdr.offset_to_procedure(), -(30 + 6 + 10)); // B -> E |
| CHECK_EQ(eh_frame_hdr.offset_to_fde(), |
| -(30 - EhFrameHdr::kCIESize)); // B -> C |
| } |
| |
| TEST(DummyEhFrameHdr) { |
| CcTest::InitializeVM(); |
| HandleScope handle_scope(CcTest::i_isolate()); |
| |
| byte buffer[10] = {0}; // The content is not relevant in this test |
| |
| CodeDesc code_desc; |
| code_desc.buffer = &buffer[0]; |
| code_desc.buffer_size = sizeof(buffer); |
| code_desc.constant_pool_size = 0; |
| code_desc.instr_size = sizeof(buffer); |
| code_desc.reloc_size = 0; |
| code_desc.origin = nullptr; |
| code_desc.unwinding_info = nullptr; |
| code_desc.unwinding_info_size = 0; |
| |
| Handle<Code> code = CcTest::i_isolate()->factory()->NewCode( |
| code_desc, 0, Handle<Object>::null()); |
| |
| EhFrameHdr eh_frame_hdr(*code); |
| // A dummy header has an empty LUT |
| CHECK_EQ(eh_frame_hdr.lut_entries_number(), 0); |
| // These values should be irrelevant, but check that they have been zeroed. |
| CHECK_EQ(eh_frame_hdr.offset_to_eh_frame(), 0); |
| CHECK_EQ(eh_frame_hdr.offset_to_procedure(), 0); |
| CHECK_EQ(eh_frame_hdr.offset_to_fde(), 0); |
| } |