80 lines
2.7 KiB
C++
80 lines
2.7 KiB
C++
//===-- ObjectFileMachOTest.cpp -------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "lldb/Host/HostInfo.h"
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#include "Plugins/ObjectFile/Mach-O/ObjectFileMachO.h"
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#include "TestingSupport/SubsystemRAII.h"
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#include "TestingSupport/TestUtilities.h"
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#include "lldb/Core/Module.h"
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#include "lldb/Host/FileSystem.h"
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#include "lldb/lldb-defines.h"
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#include "gtest/gtest.h"
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#ifdef __APPLE__
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#include <dlfcn.h>
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#endif
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using namespace lldb_private;
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using namespace llvm;
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namespace {
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class ObjectFileMachOTest : public ::testing::Test {
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SubsystemRAII<FileSystem, HostInfo, ObjectFileMachO> subsystems;
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};
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} // namespace
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#if defined(__APPLE__)
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TEST_F(ObjectFileMachOTest, ModuleFromSharedCacheInfo) {
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SharedCacheImageInfo image_info =
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HostInfo::GetSharedCacheImageInfo("/usr/lib/libobjc.A.dylib");
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EXPECT_TRUE(image_info.uuid);
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EXPECT_TRUE(image_info.data_sp);
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ModuleSpec spec(FileSpec(), UUID(), image_info.data_sp);
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lldb::ModuleSP module = std::make_shared<Module>(spec);
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ObjectFile *OF = module->GetObjectFile();
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ASSERT_TRUE(llvm::isa<ObjectFileMachO>(OF));
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EXPECT_TRUE(
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OF->GetArchitecture().IsCompatibleMatch(HostInfo::GetArchitecture()));
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Symtab *symtab = OF->GetSymtab();
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ASSERT_NE(symtab, nullptr);
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void *libobjc = dlopen("/usr/lib/libobjc.A.dylib", RTLD_LAZY);
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ASSERT_NE(libobjc, nullptr);
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// This function checks that if we read something from the
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// ObjectFile we get through the shared cache in-mmeory
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// buffer, it matches what we get by reading directly the
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// memory of the symbol.
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auto check_symbol = [&](const char *sym_name) {
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std::vector<uint32_t> symbol_indices;
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symtab->FindAllSymbolsWithNameAndType(ConstString(sym_name),
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lldb::eSymbolTypeAny, symbol_indices);
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EXPECT_EQ(symbol_indices.size(), 1u);
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Symbol *sym = symtab->SymbolAtIndex(symbol_indices[0]);
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ASSERT_NE(sym, nullptr);
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Address base = sym->GetAddress();
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size_t size = sym->GetByteSize();
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ASSERT_NE(size, 0u);
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uint8_t buffer[size];
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EXPECT_EQ(OF->ReadSectionData(base.GetSection().get(), base.GetOffset(),
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buffer, size),
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size);
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void *sym_addr = dlsym(libobjc, sym_name);
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ASSERT_NE(sym_addr, nullptr);
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EXPECT_EQ(memcmp(buffer, sym_addr, size), 0);
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};
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// Read a symbol from the __TEXT segment...
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check_symbol("objc_msgSend");
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// ... and one from the __DATA segment
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check_symbol("OBJC_CLASS_$_NSObject");
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}
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#endif
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