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/*
* Copyright (C) 2022 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "JITDebugReader.h"
#include "JITDebugReader_impl.h"
#include <sys/mman.h>
#include <android-base/file.h>
#include <android-base/scopeguard.h>
#include <android-base/strings.h>
#include <android-base/test_utils.h>
#include <android-base/unique_fd.h>
#include "get_test_data.h"
#include "utils.h"
#include <gtest/gtest.h>
using namespace simpleperf;
using namespace simpleperf::JITDebugReader_impl;
// @CddTest = 6.1/C-0-2
TEST(TempSymFile, smoke) {
TemporaryFile tmpfile;
std::unique_ptr<TempSymFile> symfile = TempSymFile::Create(tmpfile.path, false);
ASSERT_TRUE(symfile);
// If we write entries starting from offset 0, libunwindstack will treat the whole file as an elf
// file in its elf cache. So make sure we don't start from offset 0.
uint64_t offset = symfile->GetOffset();
ASSERT_NE(offset, 0u);
// Write data and read it back.
const std::string test_data = "test_data";
ASSERT_TRUE(symfile->WriteEntry(test_data.c_str(), test_data.size()));
ASSERT_TRUE(symfile->Flush());
char buf[16];
ASSERT_TRUE(android::base::ReadFullyAtOffset(tmpfile.fd, buf, test_data.size(), offset));
ASSERT_EQ(strncmp(test_data.c_str(), buf, test_data.size()), 0);
}
// @CddTest = 6.1/C-0-2
TEST(JITDebugReader, read_dex_file_in_memory) {
// 1. Create dex file in memory. Use mmap instead of malloc, to avoid the pointer from
// being modified by memory tag (or pointer authentication?) on ARM64.
std::string dex_file = GetTestData("base.vdex");
uint64_t file_size = GetFileSize(dex_file);
const uint64_t dex_file_offset = 0x28;
ASSERT_GT(file_size, dex_file_offset);
uint64_t symfile_size = file_size - dex_file_offset;
void* symfile_addr =
mmap(nullptr, symfile_size, PROT_READ | PROT_WRITE, MAP_ANONYMOUS | MAP_PRIVATE, -1, 0);
ASSERT_NE(symfile_addr, nullptr);
android::base::ScopeGuard g([&]() { munmap(symfile_addr, symfile_size); });
android::base::unique_fd fd(open(dex_file.c_str(), O_RDONLY | O_CLOEXEC));
ASSERT_TRUE(fd.ok());
ASSERT_TRUE(android::base::ReadFullyAtOffset(fd, symfile_addr, symfile_size, dex_file_offset));
// 2. Create CodeEntry pointing to the dex file in memory.
Process process;
process.pid = getpid();
process.initialized = true;
std::vector<CodeEntry> code_entries(1);
code_entries[0].addr = reinterpret_cast<uintptr_t>(&code_entries[0]);
code_entries[0].symfile_addr = reinterpret_cast<uintptr_t>(symfile_addr);
code_entries[0].symfile_size = symfile_size;
code_entries[0].timestamp = 0;
// 3. Test reading symbols from dex file in memory.
JITDebugReader reader("", JITDebugReader::SymFileOption::kDropSymFiles,
JITDebugReader::SyncOption::kNoSync);
std::vector<JITDebugInfo> debug_info;
reader.ReadDexFileDebugInfo(process, code_entries, &debug_info);
ASSERT_EQ(debug_info.size(), 1);
const JITDebugInfo& info = debug_info[0];
ASSERT_TRUE(info.dex_file_map);
ASSERT_EQ(info.dex_file_map->start_addr, reinterpret_cast<uintptr_t>(symfile_addr));
ASSERT_EQ(info.dex_file_map->len, symfile_size);
ASSERT_TRUE(android::base::StartsWith(info.dex_file_map->name, kDexFileInMemoryPrefix));
ASSERT_EQ(info.symbols.size(), 12435);
// 4. Test if the symbols are sorted.
uint64_t prev_addr = 0;
for (const auto& symbol : info.symbols) {
ASSERT_LE(prev_addr, symbol.addr);
prev_addr = symbol.addr;
}
}
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