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29
30// linux_core_dumper_unittest.cc:
31// Unit tests for google_breakpad::LinuxCoreDumoer.
32
33#include <string>
34
35#include "breakpad_googletest_includes.h"
36#include "client/linux/minidump_writer/linux_core_dumper.h"
37#include "common/linux/tests/crash_generator.h"
38#include "common/using_std_string.h"
39
40using namespace google_breakpad;
41
42TEST(LinuxCoreDumperTest, BuildProcPath) {
43  const pid_t pid = getpid();
44  const char procfs_path[] = "/procfs_copy";
45  LinuxCoreDumper dumper(getpid(), "core_file", procfs_path);
46
47  char maps_path[NAME_MAX] = "";
48  char maps_path_expected[NAME_MAX];
49  snprintf(maps_path_expected, sizeof(maps_path_expected),
50           "%s/maps", procfs_path);
51  EXPECT_TRUE(dumper.BuildProcPath(maps_path, pid, "maps"));
52  EXPECT_STREQ(maps_path_expected, maps_path);
53
54  EXPECT_FALSE(dumper.BuildProcPath(NULL, pid, "maps"));
55  EXPECT_FALSE(dumper.BuildProcPath(maps_path, pid, ""));
56  EXPECT_FALSE(dumper.BuildProcPath(maps_path, pid, NULL));
57
58  char long_node[NAME_MAX];
59  size_t long_node_len = NAME_MAX - strlen(procfs_path) - 1;
60  memset(long_node, 'a', long_node_len);
61  long_node[long_node_len] = '\0';
62  EXPECT_FALSE(dumper.BuildProcPath(maps_path, pid, long_node));
63}
64
65TEST(LinuxCoreDumperTest, VerifyDumpWithMultipleThreads) {
66  CrashGenerator crash_generator;
67  if (!crash_generator.HasDefaultCorePattern()) {
68    fprintf(stderr, "LinuxCoreDumperTest.VerifyDumpWithMultipleThreads test "
69            "is skipped due to non-default core pattern\n");
70    return;
71  }
72
73  const unsigned kNumOfThreads = 3;
74  const unsigned kCrashThread = 1;
75  const int kCrashSignal = SIGABRT;
76  pid_t child_pid;
77  ASSERT_TRUE(crash_generator.CreateChildCrash(kNumOfThreads, kCrashThread,
78                                               kCrashSignal, &child_pid));
79
80  const string core_file = crash_generator.GetCoreFilePath();
81  const string procfs_path = crash_generator.GetDirectoryOfProcFilesCopy();
82
83#if defined(__ANDROID__)
84  struct stat st;
85  if (stat(core_file.c_str(), &st) != 0) {
86    fprintf(stderr, "LinuxCoreDumperTest.VerifyDumpWithMultipleThreads test is "
87            "skipped due to no core file being generated");
88    return;
89  }
90#endif
91
92  LinuxCoreDumper dumper(child_pid, core_file.c_str(), procfs_path.c_str());
93
94  EXPECT_TRUE(dumper.Init());
95
96  EXPECT_TRUE(dumper.IsPostMortem());
97
98  // These are no-ops and should always return true.
99  EXPECT_TRUE(dumper.ThreadsSuspend());
100  EXPECT_TRUE(dumper.ThreadsResume());
101
102  // LinuxCoreDumper cannot determine the crash address and thus it always
103  // sets the crash address to 0.
104  EXPECT_EQ(0U, dumper.crash_address());
105  EXPECT_EQ(kCrashSignal, dumper.crash_signal());
106  EXPECT_EQ(crash_generator.GetThreadId(kCrashThread),
107            dumper.crash_thread());
108
109  EXPECT_EQ(kNumOfThreads, dumper.threads().size());
110  for (unsigned i = 0; i < kNumOfThreads; ++i) {
111    ThreadInfo info;
112    EXPECT_TRUE(dumper.GetThreadInfoByIndex(i, &info));
113    const void* stack;
114    size_t stack_len;
115    EXPECT_TRUE(dumper.GetStackInfo(&stack, &stack_len, info.stack_pointer));
116    EXPECT_EQ(getpid(), info.ppid);
117  }
118}
119