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platform_system_core/libunwindstack/tests/MapsTest.cpp
Christopher Ferris d226a51409 Make the library usable as a library. 
- Add namespace unwindstack everywhere so that it's easier for other
  code to use the library.
- Move some of the header files into include/unwindstack so that they
  can be exposed.
- Modify the headers so that only a limited number need to be exposed.
- Update the tools to use the new headers.
- Add a GetLoadBias() call on the Elf object. This prevents the need
  to get the interface object out of the Elf object.
- Move the GetRelPc() call out of the Reg class, to the Elf class. It's
  not always the case that a Reg object will be around when you want to
  get a relative pc. The tests for this moved to ElfTest.cpp.

Bug: 23762183

Test: Unit tests pass.
Change-Id: Iac609dac1dd90ed83d1a1e24ff2579c96c023bc3
2017-07-14 12:20:23 -07:00

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/*
* Copyright (C) 2016 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 <sys/mman.h>
#include <android-base/file.h>
#include <android-base/test_utils.h>
#include <gtest/gtest.h>
#include <unwindstack/Maps.h>
namespace unwindstack {
TEST(MapsTest, parse_permissions) {
BufferMaps maps(
"1000-2000 ---- 00000000 00:00 0\n"
"2000-3000 r--- 00000000 00:00 0\n"
"3000-4000 -w-- 00000000 00:00 0\n"
"4000-5000 --x- 00000000 00:00 0\n"
"5000-6000 rwx- 00000000 00:00 0\n");
ASSERT_TRUE(maps.Parse());
ASSERT_EQ(5U, maps.Total());
auto it = maps.begin();
ASSERT_EQ(PROT_NONE, it->flags);
ASSERT_EQ(0x1000U, it->start);
ASSERT_EQ(0x2000U, it->end);
ASSERT_EQ(0U, it->offset);
ASSERT_EQ("", it->name);
++it;
ASSERT_EQ(PROT_READ, it->flags);
ASSERT_EQ(0x2000U, it->start);
ASSERT_EQ(0x3000U, it->end);
ASSERT_EQ(0U, it->offset);
ASSERT_EQ("", it->name);
++it;
ASSERT_EQ(PROT_WRITE, it->flags);
ASSERT_EQ(0x3000U, it->start);
ASSERT_EQ(0x4000U, it->end);
ASSERT_EQ(0U, it->offset);
ASSERT_EQ("", it->name);
++it;
ASSERT_EQ(PROT_EXEC, it->flags);
ASSERT_EQ(0x4000U, it->start);
ASSERT_EQ(0x5000U, it->end);
ASSERT_EQ(0U, it->offset);
ASSERT_EQ("", it->name);
++it;
ASSERT_EQ(PROT_READ | PROT_WRITE | PROT_EXEC, it->flags);
ASSERT_EQ(0x5000U, it->start);
ASSERT_EQ(0x6000U, it->end);
ASSERT_EQ(0U, it->offset);
ASSERT_EQ("", it->name);
++it;
ASSERT_EQ(it, maps.end());
}
TEST(MapsTest, parse_name) {
BufferMaps maps(
"720b29b000-720b29e000 rw-p 00000000 00:00 0\n"
"720b29e000-720b29f000 rw-p 00000000 00:00 0 /system/lib/fake.so\n"
"720b29f000-720b2a0000 rw-p 00000000 00:00 0");
ASSERT_TRUE(maps.Parse());
ASSERT_EQ(3U, maps.Total());
auto it = maps.begin();
ASSERT_EQ("", it->name);
ASSERT_EQ(0x720b29b000U, it->start);
ASSERT_EQ(0x720b29e000U, it->end);
ASSERT_EQ(0U, it->offset);
ASSERT_EQ(PROT_READ | PROT_WRITE, it->flags);
++it;
ASSERT_EQ("/system/lib/fake.so", it->name);
ASSERT_EQ(0x720b29e000U, it->start);
ASSERT_EQ(0x720b29f000U, it->end);
ASSERT_EQ(0U, it->offset);
ASSERT_EQ(PROT_READ | PROT_WRITE, it->flags);
++it;
ASSERT_EQ("", it->name);
ASSERT_EQ(0x720b29f000U, it->start);
ASSERT_EQ(0x720b2a0000U, it->end);
ASSERT_EQ(0U, it->offset);
ASSERT_EQ(PROT_READ | PROT_WRITE, it->flags);
++it;
ASSERT_EQ(it, maps.end());
}
TEST(MapsTest, parse_offset) {
BufferMaps maps(
"a000-e000 rw-p 00000000 00:00 0 /system/lib/fake.so\n"
"e000-f000 rw-p 00a12345 00:00 0 /system/lib/fake.so\n");
ASSERT_TRUE(maps.Parse());
ASSERT_EQ(2U, maps.Total());
auto it = maps.begin();
ASSERT_EQ(0U, it->offset);
ASSERT_EQ(0xa000U, it->start);
ASSERT_EQ(0xe000U, it->end);
ASSERT_EQ(PROT_READ | PROT_WRITE, it->flags);
ASSERT_EQ("/system/lib/fake.so", it->name);
++it;
ASSERT_EQ(0xa12345U, it->offset);
ASSERT_EQ(0xe000U, it->start);
ASSERT_EQ(0xf000U, it->end);
ASSERT_EQ(PROT_READ | PROT_WRITE, it->flags);
ASSERT_EQ("/system/lib/fake.so", it->name);
++it;
ASSERT_EQ(maps.end(), it);
}
TEST(MapsTest, device) {
BufferMaps maps(
"a000-e000 rw-p 00000000 00:00 0 /dev/\n"
"f000-f100 rw-p 00000000 00:00 0 /dev/does_not_exist\n"
"f100-f200 rw-p 00000000 00:00 0 /dev/ashmem/does_not_exist\n"
"f200-f300 rw-p 00000000 00:00 0 /devsomething/does_not_exist\n");
ASSERT_TRUE(maps.Parse());
ASSERT_EQ(4U, maps.Total());
auto it = maps.begin();
ASSERT_TRUE(it->flags & 0x8000);
ASSERT_EQ("/dev/", it->name);
++it;
ASSERT_TRUE(it->flags & 0x8000);
ASSERT_EQ("/dev/does_not_exist", it->name);
++it;
ASSERT_FALSE(it->flags & 0x8000);
ASSERT_EQ("/dev/ashmem/does_not_exist", it->name);
++it;
ASSERT_FALSE(it->flags & 0x8000);
ASSERT_EQ("/devsomething/does_not_exist", it->name);
}
TEST(MapsTest, file_smoke) {
TemporaryFile tf;
ASSERT_TRUE(tf.fd != -1);
ASSERT_TRUE(
android::base::WriteStringToFile("720b29b000-720b29e000 r-xp a0000000 00:00 0 /fake.so\n"
"720b2b0000-720b2e0000 r-xp b0000000 00:00 0 /fake2.so\n"
"720b2e0000-720b2f0000 r-xp c0000000 00:00 0 /fake3.so\n",
tf.path, 0660, getuid(), getgid()));
FileMaps maps(tf.path);
ASSERT_TRUE(maps.Parse());
ASSERT_EQ(3U, maps.Total());
auto it = maps.begin();
ASSERT_EQ(0x720b29b000U, it->start);
ASSERT_EQ(0x720b29e000U, it->end);
ASSERT_EQ(0xa0000000U, it->offset);
ASSERT_EQ(PROT_READ | PROT_EXEC, it->flags);
ASSERT_EQ("/fake.so", it->name);
++it;
ASSERT_EQ(0x720b2b0000U, it->start);
ASSERT_EQ(0x720b2e0000U, it->end);
ASSERT_EQ(0xb0000000U, it->offset);
ASSERT_EQ(PROT_READ | PROT_EXEC, it->flags);
ASSERT_EQ("/fake2.so", it->name);
++it;
ASSERT_EQ(0x720b2e0000U, it->start);
ASSERT_EQ(0x720b2f0000U, it->end);
ASSERT_EQ(0xc0000000U, it->offset);
ASSERT_EQ(PROT_READ | PROT_EXEC, it->flags);
ASSERT_EQ("/fake3.so", it->name);
++it;
ASSERT_EQ(it, maps.end());
}
TEST(MapsTest, find) {
BufferMaps maps(
"1000-2000 r--p 00000010 00:00 0 /system/lib/fake1.so\n"
"3000-4000 -w-p 00000020 00:00 0 /system/lib/fake2.so\n"
"6000-8000 --xp 00000030 00:00 0 /system/lib/fake3.so\n"
"a000-b000 rw-p 00000040 00:00 0 /system/lib/fake4.so\n"
"e000-f000 rwxp 00000050 00:00 0 /system/lib/fake5.so\n");
ASSERT_TRUE(maps.Parse());
ASSERT_EQ(5U, maps.Total());
ASSERT_TRUE(maps.Find(0x500) == nullptr);
ASSERT_TRUE(maps.Find(0x2000) == nullptr);
ASSERT_TRUE(maps.Find(0x5010) == nullptr);
ASSERT_TRUE(maps.Find(0x9a00) == nullptr);
ASSERT_TRUE(maps.Find(0xf000) == nullptr);
ASSERT_TRUE(maps.Find(0xf010) == nullptr);
MapInfo* info = maps.Find(0x1000);
ASSERT_TRUE(info != nullptr);
ASSERT_EQ(0x1000U, info->start);
ASSERT_EQ(0x2000U, info->end);
ASSERT_EQ(0x10U, info->offset);
ASSERT_EQ(PROT_READ, info->flags);
ASSERT_EQ("/system/lib/fake1.so", info->name);
info = maps.Find(0x3020);
ASSERT_TRUE(info != nullptr);
ASSERT_EQ(0x3000U, info->start);
ASSERT_EQ(0x4000U, info->end);
ASSERT_EQ(0x20U, info->offset);
ASSERT_EQ(PROT_WRITE, info->flags);
ASSERT_EQ("/system/lib/fake2.so", info->name);
info = maps.Find(0x6020);
ASSERT_TRUE(info != nullptr);
ASSERT_EQ(0x6000U, info->start);
ASSERT_EQ(0x8000U, info->end);
ASSERT_EQ(0x30U, info->offset);
ASSERT_EQ(PROT_EXEC, info->flags);
ASSERT_EQ("/system/lib/fake3.so", info->name);
info = maps.Find(0xafff);
ASSERT_TRUE(info != nullptr);
ASSERT_EQ(0xa000U, info->start);
ASSERT_EQ(0xb000U, info->end);
ASSERT_EQ(0x40U, info->offset);
ASSERT_EQ(PROT_READ | PROT_WRITE, info->flags);
ASSERT_EQ("/system/lib/fake4.so", info->name);
info = maps.Find(0xe500);
ASSERT_TRUE(info != nullptr);
ASSERT_EQ(0xe000U, info->start);
ASSERT_EQ(0xf000U, info->end);
ASSERT_EQ(0x50U, info->offset);
ASSERT_EQ(PROT_READ | PROT_WRITE | PROT_EXEC, info->flags);
ASSERT_EQ("/system/lib/fake5.so", info->name);
}
} // namespace unwindstack
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