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-rw-r--r--base/debug/proc_maps_linux_unittest.cc328
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diff --git a/base/debug/proc_maps_linux_unittest.cc b/base/debug/proc_maps_linux_unittest.cc
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+++ b/base/debug/proc_maps_linux_unittest.cc
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+// Copyright (c) 2013 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 <stddef.h>
+#include <stdint.h>
+
+#include "base/debug/proc_maps_linux.h"
+#include "base/files/file_path.h"
+#include "base/macros.h"
+#include "base/path_service.h"
+#include "base/strings/stringprintf.h"
+#include "base/threading/platform_thread.h"
+#include "build/build_config.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace base {
+namespace debug {
+
+TEST(ProcMapsTest, Empty) {
+ std::vector<MappedMemoryRegion> regions;
+ EXPECT_TRUE(ParseProcMaps("", &regions));
+ EXPECT_EQ(0u, regions.size());
+}
+
+TEST(ProcMapsTest, NoSpaces) {
+ static const char kNoSpaces[] =
+ "00400000-0040b000 r-xp 00002200 fc:00 794418 /bin/cat\n";
+
+ std::vector<MappedMemoryRegion> regions;
+ ASSERT_TRUE(ParseProcMaps(kNoSpaces, &regions));
+ ASSERT_EQ(1u, regions.size());
+
+ EXPECT_EQ(0x00400000u, regions[0].start);
+ EXPECT_EQ(0x0040b000u, regions[0].end);
+ EXPECT_EQ(0x00002200u, regions[0].offset);
+ EXPECT_EQ("/bin/cat", regions[0].path);
+}
+
+TEST(ProcMapsTest, Spaces) {
+ static const char kSpaces[] =
+ "00400000-0040b000 r-xp 00002200 fc:00 794418 /bin/space cat\n";
+
+ std::vector<MappedMemoryRegion> regions;
+ ASSERT_TRUE(ParseProcMaps(kSpaces, &regions));
+ ASSERT_EQ(1u, regions.size());
+
+ EXPECT_EQ(0x00400000u, regions[0].start);
+ EXPECT_EQ(0x0040b000u, regions[0].end);
+ EXPECT_EQ(0x00002200u, regions[0].offset);
+ EXPECT_EQ("/bin/space cat", regions[0].path);
+}
+
+TEST(ProcMapsTest, NoNewline) {
+ static const char kNoSpaces[] =
+ "00400000-0040b000 r-xp 00002200 fc:00 794418 /bin/cat";
+
+ std::vector<MappedMemoryRegion> regions;
+ ASSERT_FALSE(ParseProcMaps(kNoSpaces, &regions));
+}
+
+TEST(ProcMapsTest, NoPath) {
+ static const char kNoPath[] =
+ "00400000-0040b000 rw-p 00000000 00:00 0 \n";
+
+ std::vector<MappedMemoryRegion> regions;
+ ASSERT_TRUE(ParseProcMaps(kNoPath, &regions));
+ ASSERT_EQ(1u, regions.size());
+
+ EXPECT_EQ(0x00400000u, regions[0].start);
+ EXPECT_EQ(0x0040b000u, regions[0].end);
+ EXPECT_EQ(0x00000000u, regions[0].offset);
+ EXPECT_EQ("", regions[0].path);
+}
+
+TEST(ProcMapsTest, Heap) {
+ static const char kHeap[] =
+ "022ac000-022cd000 rw-p 00000000 00:00 0 [heap]\n";
+
+ std::vector<MappedMemoryRegion> regions;
+ ASSERT_TRUE(ParseProcMaps(kHeap, &regions));
+ ASSERT_EQ(1u, regions.size());
+
+ EXPECT_EQ(0x022ac000u, regions[0].start);
+ EXPECT_EQ(0x022cd000u, regions[0].end);
+ EXPECT_EQ(0x00000000u, regions[0].offset);
+ EXPECT_EQ("[heap]", regions[0].path);
+}
+
+#if defined(ARCH_CPU_32_BITS)
+TEST(ProcMapsTest, Stack32) {
+ static const char kStack[] =
+ "beb04000-beb25000 rw-p 00000000 00:00 0 [stack]\n";
+
+ std::vector<MappedMemoryRegion> regions;
+ ASSERT_TRUE(ParseProcMaps(kStack, &regions));
+ ASSERT_EQ(1u, regions.size());
+
+ EXPECT_EQ(0xbeb04000u, regions[0].start);
+ EXPECT_EQ(0xbeb25000u, regions[0].end);
+ EXPECT_EQ(0x00000000u, regions[0].offset);
+ EXPECT_EQ("[stack]", regions[0].path);
+}
+#elif defined(ARCH_CPU_64_BITS)
+TEST(ProcMapsTest, Stack64) {
+ static const char kStack[] =
+ "7fff69c5b000-7fff69c7d000 rw-p 00000000 00:00 0 [stack]\n";
+
+ std::vector<MappedMemoryRegion> regions;
+ ASSERT_TRUE(ParseProcMaps(kStack, &regions));
+ ASSERT_EQ(1u, regions.size());
+
+ EXPECT_EQ(0x7fff69c5b000u, regions[0].start);
+ EXPECT_EQ(0x7fff69c7d000u, regions[0].end);
+ EXPECT_EQ(0x00000000u, regions[0].offset);
+ EXPECT_EQ("[stack]", regions[0].path);
+}
+#endif
+
+TEST(ProcMapsTest, Multiple) {
+ static const char kMultiple[] =
+ "00400000-0040b000 r-xp 00000000 fc:00 794418 /bin/cat\n"
+ "0060a000-0060b000 r--p 0000a000 fc:00 794418 /bin/cat\n"
+ "0060b000-0060c000 rw-p 0000b000 fc:00 794418 /bin/cat\n";
+
+ std::vector<MappedMemoryRegion> regions;
+ ASSERT_TRUE(ParseProcMaps(kMultiple, &regions));
+ ASSERT_EQ(3u, regions.size());
+
+ EXPECT_EQ(0x00400000u, regions[0].start);
+ EXPECT_EQ(0x0040b000u, regions[0].end);
+ EXPECT_EQ(0x00000000u, regions[0].offset);
+ EXPECT_EQ("/bin/cat", regions[0].path);
+
+ EXPECT_EQ(0x0060a000u, regions[1].start);
+ EXPECT_EQ(0x0060b000u, regions[1].end);
+ EXPECT_EQ(0x0000a000u, regions[1].offset);
+ EXPECT_EQ("/bin/cat", regions[1].path);
+
+ EXPECT_EQ(0x0060b000u, regions[2].start);
+ EXPECT_EQ(0x0060c000u, regions[2].end);
+ EXPECT_EQ(0x0000b000u, regions[2].offset);
+ EXPECT_EQ("/bin/cat", regions[2].path);
+}
+
+TEST(ProcMapsTest, Permissions) {
+ static struct {
+ const char* input;
+ uint8_t permissions;
+ } kTestCases[] = {
+ {"00400000-0040b000 ---s 00000000 fc:00 794418 /bin/cat\n", 0},
+ {"00400000-0040b000 ---S 00000000 fc:00 794418 /bin/cat\n", 0},
+ {"00400000-0040b000 r--s 00000000 fc:00 794418 /bin/cat\n",
+ MappedMemoryRegion::READ},
+ {"00400000-0040b000 -w-s 00000000 fc:00 794418 /bin/cat\n",
+ MappedMemoryRegion::WRITE},
+ {"00400000-0040b000 --xs 00000000 fc:00 794418 /bin/cat\n",
+ MappedMemoryRegion::EXECUTE},
+ {"00400000-0040b000 rwxs 00000000 fc:00 794418 /bin/cat\n",
+ MappedMemoryRegion::READ | MappedMemoryRegion::WRITE |
+ MappedMemoryRegion::EXECUTE},
+ {"00400000-0040b000 ---p 00000000 fc:00 794418 /bin/cat\n",
+ MappedMemoryRegion::PRIVATE},
+ {"00400000-0040b000 r--p 00000000 fc:00 794418 /bin/cat\n",
+ MappedMemoryRegion::READ | MappedMemoryRegion::PRIVATE},
+ {"00400000-0040b000 -w-p 00000000 fc:00 794418 /bin/cat\n",
+ MappedMemoryRegion::WRITE | MappedMemoryRegion::PRIVATE},
+ {"00400000-0040b000 --xp 00000000 fc:00 794418 /bin/cat\n",
+ MappedMemoryRegion::EXECUTE | MappedMemoryRegion::PRIVATE},
+ {"00400000-0040b000 rwxp 00000000 fc:00 794418 /bin/cat\n",
+ MappedMemoryRegion::READ | MappedMemoryRegion::WRITE |
+ MappedMemoryRegion::EXECUTE | MappedMemoryRegion::PRIVATE},
+ };
+
+ for (size_t i = 0; i < arraysize(kTestCases); ++i) {
+ SCOPED_TRACE(
+ base::StringPrintf("kTestCases[%zu] = %s", i, kTestCases[i].input));
+
+ std::vector<MappedMemoryRegion> regions;
+ EXPECT_TRUE(ParseProcMaps(kTestCases[i].input, &regions));
+ EXPECT_EQ(1u, regions.size());
+ if (regions.empty())
+ continue;
+ EXPECT_EQ(kTestCases[i].permissions, regions[0].permissions);
+ }
+}
+
+#if defined(ADDRESS_SANITIZER)
+// AddressSanitizer may move local variables to a dedicated "fake stack" which
+// is outside the stack region listed in /proc/self/maps. We disable ASan
+// instrumentation for this function to force the variable to be local.
+__attribute__((no_sanitize_address))
+#endif
+void CheckProcMapsRegions(const std::vector<MappedMemoryRegion> &regions) {
+ // We should be able to find both the current executable as well as the stack
+ // mapped into memory. Use the address of |exe_path| as a way of finding the
+ // stack.
+ FilePath exe_path;
+ EXPECT_TRUE(PathService::Get(FILE_EXE, &exe_path));
+ uintptr_t address = reinterpret_cast<uintptr_t>(&exe_path);
+ bool found_exe = false;
+ bool found_stack = false;
+ bool found_address = false;
+
+ for (size_t i = 0; i < regions.size(); ++i) {
+ if (regions[i].path == exe_path.value()) {
+ // It's OK to find the executable mapped multiple times as there'll be
+ // multiple sections (e.g., text, data).
+ found_exe = true;
+ }
+
+ if (regions[i].path == "[stack]") {
+// On Android the test is run on a background thread, since [stack] is for
+// the main thread, we cannot test this.
+#if !defined(OS_ANDROID)
+ EXPECT_GE(address, regions[i].start);
+ EXPECT_LT(address, regions[i].end);
+#endif
+ EXPECT_TRUE(regions[i].permissions & MappedMemoryRegion::READ);
+ EXPECT_TRUE(regions[i].permissions & MappedMemoryRegion::WRITE);
+ EXPECT_FALSE(regions[i].permissions & MappedMemoryRegion::EXECUTE);
+ EXPECT_TRUE(regions[i].permissions & MappedMemoryRegion::PRIVATE);
+ EXPECT_FALSE(found_stack) << "Found duplicate stacks";
+ found_stack = true;
+ }
+
+ if (address >= regions[i].start && address < regions[i].end) {
+ EXPECT_FALSE(found_address) << "Found same address in multiple regions";
+ found_address = true;
+ }
+ }
+
+ EXPECT_TRUE(found_exe);
+ EXPECT_TRUE(found_stack);
+ EXPECT_TRUE(found_address);
+}
+
+TEST(ProcMapsTest, ReadProcMaps) {
+ std::string proc_maps;
+ ASSERT_TRUE(ReadProcMaps(&proc_maps));
+
+ std::vector<MappedMemoryRegion> regions;
+ ASSERT_TRUE(ParseProcMaps(proc_maps, &regions));
+ ASSERT_FALSE(regions.empty());
+
+ CheckProcMapsRegions(regions);
+}
+
+TEST(ProcMapsTest, ReadProcMapsNonEmptyString) {
+ std::string old_string("I forgot to clear the string");
+ std::string proc_maps(old_string);
+ ASSERT_TRUE(ReadProcMaps(&proc_maps));
+ EXPECT_EQ(std::string::npos, proc_maps.find(old_string));
+}
+
+TEST(ProcMapsTest, MissingFields) {
+ static const char* const kTestCases[] = {
+ "00400000\n", // Missing end + beyond.
+ "00400000-0040b000\n", // Missing perms + beyond.
+ "00400000-0040b000 r-xp\n", // Missing offset + beyond.
+ "00400000-0040b000 r-xp 00000000\n", // Missing device + beyond.
+ "00400000-0040b000 r-xp 00000000 fc:00\n", // Missing inode + beyond.
+ "00400000-0040b000 00000000 fc:00 794418 /bin/cat\n", // Missing perms.
+ "00400000-0040b000 r-xp fc:00 794418 /bin/cat\n", // Missing offset.
+ "00400000-0040b000 r-xp 00000000 fc:00 /bin/cat\n", // Missing inode.
+ "00400000 r-xp 00000000 fc:00 794418 /bin/cat\n", // Missing end.
+ "-0040b000 r-xp 00000000 fc:00 794418 /bin/cat\n", // Missing start.
+ "00400000-0040b000 r-xp 00000000 794418 /bin/cat\n", // Missing device.
+ };
+
+ for (size_t i = 0; i < arraysize(kTestCases); ++i) {
+ SCOPED_TRACE(base::StringPrintf("kTestCases[%zu] = %s", i, kTestCases[i]));
+ std::vector<MappedMemoryRegion> regions;
+ EXPECT_FALSE(ParseProcMaps(kTestCases[i], &regions));
+ }
+}
+
+TEST(ProcMapsTest, InvalidInput) {
+ static const char* const kTestCases[] = {
+ "thisisal-0040b000 rwxp 00000000 fc:00 794418 /bin/cat\n",
+ "0040000d-linvalid rwxp 00000000 fc:00 794418 /bin/cat\n",
+ "00400000-0040b000 inpu 00000000 fc:00 794418 /bin/cat\n",
+ "00400000-0040b000 rwxp tforproc fc:00 794418 /bin/cat\n",
+ "00400000-0040b000 rwxp 00000000 ma:ps 794418 /bin/cat\n",
+ "00400000-0040b000 rwxp 00000000 fc:00 parse! /bin/cat\n",
+ };
+
+ for (size_t i = 0; i < arraysize(kTestCases); ++i) {
+ SCOPED_TRACE(base::StringPrintf("kTestCases[%zu] = %s", i, kTestCases[i]));
+ std::vector<MappedMemoryRegion> regions;
+ EXPECT_FALSE(ParseProcMaps(kTestCases[i], &regions));
+ }
+}
+
+TEST(ProcMapsTest, ParseProcMapsEmptyString) {
+ std::vector<MappedMemoryRegion> regions;
+ EXPECT_TRUE(ParseProcMaps("", &regions));
+ EXPECT_EQ(0ULL, regions.size());
+}
+
+// Testing a couple of remotely possible weird things in the input:
+// - Line ending with \r\n or \n\r.
+// - File name contains quotes.
+// - File name has whitespaces.
+TEST(ProcMapsTest, ParseProcMapsWeirdCorrectInput) {
+ std::vector<MappedMemoryRegion> regions;
+ const std::string kContents =
+ "00400000-0040b000 r-xp 00000000 fc:00 2106562 "
+ " /bin/cat\r\n"
+ "7f53b7dad000-7f53b7f62000 r-xp 00000000 fc:00 263011 "
+ " /lib/x86_64-linux-gnu/libc-2.15.so\n\r"
+ "7f53b816d000-7f53b818f000 r-xp 00000000 fc:00 264284 "
+ " /lib/x86_64-linux-gnu/ld-2.15.so\n"
+ "7fff9c7ff000-7fff9c800000 r-xp 00000000 00:00 0 "
+ " \"vd so\"\n"
+ "ffffffffff600000-ffffffffff601000 r-xp 00000000 00:00 0 "
+ " [vsys call]\n";
+ EXPECT_TRUE(ParseProcMaps(kContents, &regions));
+ EXPECT_EQ(5ULL, regions.size());
+ EXPECT_EQ("/bin/cat", regions[0].path);
+ EXPECT_EQ("/lib/x86_64-linux-gnu/libc-2.15.so", regions[1].path);
+ EXPECT_EQ("/lib/x86_64-linux-gnu/ld-2.15.so", regions[2].path);
+ EXPECT_EQ("\"vd so\"", regions[3].path);
+ EXPECT_EQ("[vsys call]", regions[4].path);
+}
+
+} // namespace debug
+} // namespace base
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