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Unified Diff: base/android/library_loader/library_prefetcher_unittest.cc

Issue 1001343002: Prefetch the native library from native code by parsing /proc/pid/maps. (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: Typo. Created 5 years, 9 months ago
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Index: base/android/library_loader/library_prefetcher_unittest.cc
diff --git a/base/android/library_loader/library_prefetcher_unittest.cc b/base/android/library_loader/library_prefetcher_unittest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..f7c477b027f0e6363e6c5990795fc2037e6ae8d5
--- /dev/null
+++ b/base/android/library_loader/library_prefetcher_unittest.cc
@@ -0,0 +1,180 @@
+// Copyright 2015 The Chromium 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 "base/android/library_loader/library_prefetcher.h"
+
+#include <string>
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace base {
+namespace android {
+
+class ProcMapsIteratorTest : public NativeLibraryPrefetcher {
+ class FakeFileLineIterator
+ : public NativeLibraryPrefetcher::FileLineIterator {
+ public:
+ FakeFileLineIterator(const char* lines[]) : lines_(lines), index_(0) {}
+
+ virtual bool NextLine(std::string* line) override {
+ const char* line_str = lines_[index_++];
+ if (!line_str)
+ return false;
+ *line = std::string(line_str);
+ return true;
+ }
+
+ private:
+ const char* const* lines_;
+ size_t index_;
+ };
+
+ FRIEND_TEST_ALL_PREFIXES(ProcMapsIteratorTest, TestParseLine32Bits);
+ FRIEND_TEST_ALL_PREFIXES(ProcMapsIteratorTest, TestParseLine64Bits);
+ FRIEND_TEST_ALL_PREFIXES(ProcMapsIteratorTest, TestParseLineNoFile);
+ FRIEND_TEST_ALL_PREFIXES(ProcMapsIteratorTest, TestFindRangeNoRange);
+ FRIEND_TEST_ALL_PREFIXES(ProcMapsIteratorTest,
+ TestFindRangeSkipUnreadableRange);
+ FRIEND_TEST_ALL_PREFIXES(ProcMapsIteratorTest, TestFindRangeSkipSharedRange);
+ FRIEND_TEST_ALL_PREFIXES(ProcMapsIteratorTest,
+ TestFindRangeFindLibChromeRange);
+ FRIEND_TEST_ALL_PREFIXES(ProcMapsIteratorTest,
+ TestFindRangeFindBaseApkRanges);
+};
+
+TEST(ProcMapsIteratorTest, TestParseLine32Bits) {
+ const char* lines[] = {
+ "b6e62000-b6e64000 r-xp 00000000 b3:15 1204 /lib/libstdc++.so\n",
+ nullptr};
+ ProcMapsIteratorTest::FakeFileLineIterator file_line_iterator(lines);
+ NativeLibraryPrefetcher::ProcMapsIterator maps_iterator(&file_line_iterator);
+ NativeLibraryPrefetcher::ProcMapsIterator::Mapping mapping;
+ ASSERT_TRUE(maps_iterator.Next(&mapping));
+ EXPECT_EQ(mapping.start, 0xb6e62000ULL);
+ EXPECT_EQ(mapping.end, 0xb6e64000ULL);
+ EXPECT_EQ(mapping.flags, "r-xp");
+ EXPECT_EQ(mapping.offset, 0ULL);
+ EXPECT_EQ(mapping.device, "b3:15");
+ EXPECT_EQ(mapping.inode, 1204LL);
+ EXPECT_EQ(mapping.filename, "/lib/libstdc++.so");
+ ASSERT_FALSE(maps_iterator.Next(&mapping));
+}
+
+TEST(ProcMapsIteratorTest, TestParseLine64Bits) {
+ const char* lines[] = {
+ "800000b6e62000-800000b6e64000 r-xp 00000000 b3:15 1204 libstdc++.so\n",
+ nullptr};
+ ProcMapsIteratorTest::FakeFileLineIterator file_line_iterator(lines);
+ NativeLibraryPrefetcher::ProcMapsIterator maps_iterator(&file_line_iterator);
+ NativeLibraryPrefetcher::ProcMapsIterator::Mapping mapping;
+ ASSERT_TRUE(maps_iterator.Next(&mapping));
+ EXPECT_EQ(mapping.start, 0x800000b6e62000ULL);
+ EXPECT_EQ(mapping.end, 0x800000b6e64000ULL);
+ EXPECT_EQ(mapping.flags, "r-xp");
+ EXPECT_EQ(mapping.offset, 0ULL);
+ EXPECT_EQ(mapping.device, "b3:15");
+ EXPECT_EQ(mapping.inode, 1204LL);
+ EXPECT_EQ(mapping.filename, "libstdc++.so");
+ ASSERT_FALSE(maps_iterator.Next(&mapping));
+}
+
+TEST(ProcMapsIteratorTest, TestParseLineNoFile) {
+ const char* lines[] = {"b6e62000-b6e64000 r-xp 00000000 b3:15 1204 \n",
+ nullptr};
+ ProcMapsIteratorTest::FakeFileLineIterator file_line_iterator(lines);
+ NativeLibraryPrefetcher::ProcMapsIterator maps_iterator(&file_line_iterator);
+ NativeLibraryPrefetcher::ProcMapsIterator::Mapping mapping;
+ ASSERT_TRUE(maps_iterator.Next(&mapping));
+ EXPECT_EQ(mapping.start, 0xb6e62000ULL);
+ EXPECT_EQ(mapping.end, 0xb6e64000ULL);
+ EXPECT_EQ(mapping.flags, "r-xp");
+ EXPECT_EQ(mapping.offset, 0ULL);
+ EXPECT_EQ(mapping.device, "b3:15");
+ EXPECT_EQ(mapping.inode, 1204LL);
+ EXPECT_EQ(mapping.filename, "");
+ ASSERT_FALSE(maps_iterator.Next(&mapping));
+}
+
+TEST(ProcMapsIteratorTest, TestFindRangeNoRange) {
+ const char* lines[] = {
+ "800000b6e62000-800000b6e64000 r-xp 00000000 b3:15 1204 \n",
+ "800000b6e62000-800000b6e64000 r-xp 00000000 b3:15 1204 foo\n",
+ "800000b6e62000-800000b6e64000 r-xp 00000000 b3:15 1204 foobar.apk\n",
+ "800000b6e62000-800000b6e64000 r-xp 00000000 b3:15 1204 libchromium.so\n",
+ nullptr};
+ ProcMapsIteratorTest::FakeFileLineIterator file_line_iterator(lines);
+ NativeLibraryPrefetcher::ProcMapsIterator maps_iterator(&file_line_iterator);
+ std::vector<std::pair<uint64_t, uint64_t>> ranges =
+ NativeLibraryPrefetcher::ProcMapsIterator::FindRanges(
+ &file_line_iterator);
+ EXPECT_EQ(ranges.size(), 0ULL);
+}
+
+TEST(ProcMapsIteratorTest, TestFindRangeSkipUnreadableRange) {
+ const char* lines[] = {
+ "800000b6e62000-800000b6e64000 r-xp 00000000 b3:15 1204 \n",
+ "800000b6e62000-800000b6e64000 r-xp 00000000 b3:15 1204 foo\n",
+ "800000b6e62000-800000b6e64000 --xp 00000000 b3:15 1204 base.apk\n",
+ "800000b6e62000-800000b6e64000 r-xp 00000000 b3:15 1204 libchromium.so\n",
+ nullptr};
+ ProcMapsIteratorTest::FakeFileLineIterator file_line_iterator(lines);
+ NativeLibraryPrefetcher::ProcMapsIterator maps_iterator(&file_line_iterator);
+ std::vector<std::pair<uint64_t, uint64_t>> ranges =
+ NativeLibraryPrefetcher::ProcMapsIterator::FindRanges(
+ &file_line_iterator);
+ EXPECT_EQ(ranges.size(), 0ULL);
+}
+
+TEST(ProcMapsIteratorTest, TestFindRangeSkipSharedRange) {
+ const char* lines[] = {
+ "800000b6e62000-800000b6e64000 r-xp 00000000 b3:15 1204 \n",
+ "800000b6e62000-800000b6e64000 r-xp 00000000 b3:15 1204 foo\n",
+ "800000b6e62000-800000b6e64000 r-xs 00000000 b3:15 1204 base.apk\n",
+ "800000b6e62000-800000b6e64000 r-xp 00000000 b3:15 1204 libchromium.so\n",
+ nullptr};
+ ProcMapsIteratorTest::FakeFileLineIterator file_line_iterator(lines);
+ NativeLibraryPrefetcher::ProcMapsIterator maps_iterator(&file_line_iterator);
+ std::vector<std::pair<uint64_t, uint64_t>> ranges =
+ NativeLibraryPrefetcher::ProcMapsIterator::FindRanges(
+ &file_line_iterator);
+ EXPECT_EQ(ranges.size(), 0ULL);
+}
+
+TEST(ProcMapsIteratorTest, TestFindRangeFindLibChromeRange) {
+ const char* lines[] = {
+ "800000b6e62000-800000b6e64000 r-xp 00000000 b3:15 1204 \n",
+ "800000b6e62000-800000b6e64000 r-xp 00000000 b3:15 1204 foo\n",
+ "800000b6e62000-800000b6e64000 --xp 00000000 b3:15 1204 base-ish.apk\n",
+ "42-43 r-xp 00000000 b3:15 42 libchrome.so\n",
+ nullptr};
+ ProcMapsIteratorTest::FakeFileLineIterator file_line_iterator(lines);
+ NativeLibraryPrefetcher::ProcMapsIterator maps_iterator(&file_line_iterator);
+ std::vector<std::pair<uint64_t, uint64_t>> ranges =
+ NativeLibraryPrefetcher::ProcMapsIterator::FindRanges(
+ &file_line_iterator);
+ EXPECT_EQ(ranges.size(), 1ULL);
+ EXPECT_EQ(ranges[0].first, 0x42ULL);
+ EXPECT_EQ(ranges[0].second, 0x43ULL);
+}
+
+TEST(ProcMapsIteratorTest, TestFindRangeFindBaseApkRanges) {
+ const char* lines[] = {
+ "800000b6e62000-800000b6e64000 r-xp 00000000 b3:15 1204 \n",
+ "800000b6e62000-800000b6e64000 r-xp 00000000 b3:15 1204 foo\n",
+ "42-43 rw-p 00000000 b3:15 1204 base.apk\n",
+ "64-1000 r-xp 00000000 b3:15 42 base.apk\n",
+ nullptr};
+ ProcMapsIteratorTest::FakeFileLineIterator file_line_iterator(lines);
+ NativeLibraryPrefetcher::ProcMapsIterator maps_iterator(&file_line_iterator);
+ std::vector<std::pair<uint64_t, uint64_t>> ranges =
+ NativeLibraryPrefetcher::ProcMapsIterator::FindRanges(
+ &file_line_iterator);
+ EXPECT_EQ(ranges.size(), 2ULL);
+ EXPECT_EQ(ranges[0].first, 0x42ULL);
+ EXPECT_EQ(ranges[0].second, 0x43ULL);
+ EXPECT_EQ(ranges[1].first, 0x64ULL);
+ EXPECT_EQ(ranges[1].second, 0x1000ULL);
+}
+
+} // namespace android
+} // namespace base

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