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30 // Author: Satoru Takabayashi
32 // Unit tests for functions in demangle.c.
34 #include "utilities.h"
39 #include "glog/logging.h"
41 #include "googletest.h"
44 GLOG_DEFINE_bool(demangle_filter, false,
45 "Run demangle_unittest in filter mode");
48 using namespace GOOGLE_NAMESPACE;
50 // A wrapper function for Demangle() to make the unit test simple.
51 static const char *DemangleIt(const char * const mangled) {
52 static char demangled[4096];
53 if (Demangle(mangled, demangled, sizeof(demangled))) {
60 // Test corner cases of bounary conditions.
61 TEST(Demangle, CornerCases) {
63 EXPECT_TRUE(Demangle("_Z6foobarv", tmp, sizeof(tmp)));
64 // sizeof("foobar()") == 9
65 EXPECT_STREQ("foobar()", tmp);
66 EXPECT_TRUE(Demangle("_Z6foobarv", tmp, 9));
67 EXPECT_STREQ("foobar()", tmp);
68 EXPECT_FALSE(Demangle("_Z6foobarv", tmp, 8)); // Not enough.
69 EXPECT_FALSE(Demangle("_Z6foobarv", tmp, 1));
70 EXPECT_FALSE(Demangle("_Z6foobarv", tmp, 0));
71 EXPECT_FALSE(Demangle("_Z6foobarv", NULL, 0)); // Should not cause SEGV.
74 // Test handling of functions suffixed with .clone.N, which is used by GCC
75 // 4.5.x, and .constprop.N and .isra.N, which are used by GCC 4.6.x. These
76 // suffixes are used to indicate functions which have been cloned during
77 // optimization. We ignore these suffixes.
78 TEST(Demangle, Clones) {
80 EXPECT_TRUE(Demangle("_ZL3Foov", tmp, sizeof(tmp)));
81 EXPECT_STREQ("Foo()", tmp);
82 EXPECT_TRUE(Demangle("_ZL3Foov.clone.3", tmp, sizeof(tmp)));
83 EXPECT_STREQ("Foo()", tmp);
84 EXPECT_TRUE(Demangle("_ZL3Foov.constprop.80", tmp, sizeof(tmp)));
85 EXPECT_STREQ("Foo()", tmp);
86 EXPECT_TRUE(Demangle("_ZL3Foov.isra.18", tmp, sizeof(tmp)));
87 EXPECT_STREQ("Foo()", tmp);
88 EXPECT_TRUE(Demangle("_ZL3Foov.isra.2.constprop.18", tmp, sizeof(tmp)));
89 EXPECT_STREQ("Foo()", tmp);
90 // Invalid (truncated), should not demangle.
91 EXPECT_FALSE(Demangle("_ZL3Foov.clo", tmp, sizeof(tmp)));
92 // Invalid (.clone. not followed by number), should not demangle.
93 EXPECT_FALSE(Demangle("_ZL3Foov.clone.", tmp, sizeof(tmp)));
94 // Invalid (.clone. followed by non-number), should not demangle.
95 EXPECT_FALSE(Demangle("_ZL3Foov.clone.foo", tmp, sizeof(tmp)));
96 // Invalid (.constprop. not followed by number), should not demangle.
97 EXPECT_FALSE(Demangle("_ZL3Foov.isra.2.constprop.", tmp, sizeof(tmp)));
100 TEST(Demangle, FromFile) {
101 string test_file = FLAGS_test_srcdir + "/src/demangle_unittest.txt";
102 ifstream f(test_file.c_str()); // The file should exist.
103 EXPECT_FALSE(f.fail());
106 while (getline(f, line)) {
107 // Lines start with '#' are considered as comments.
108 if (line.empty() || line[0] == '#') {
111 // Each line should contain a mangled name and a demangled name
112 // separated by '\t'. Example: "_Z3foo\tfoo"
113 string::size_type tab_pos = line.find('\t');
114 EXPECT_NE(string::npos, tab_pos);
115 string mangled = line.substr(0, tab_pos);
116 string demangled = line.substr(tab_pos + 1);
117 EXPECT_EQ(demangled, DemangleIt(mangled.c_str()));
121 int main(int argc, char **argv) {
122 #ifdef HAVE_LIB_GFLAGS
123 ParseCommandLineFlags(&argc, &argv, true);
125 InitGoogleTest(&argc, argv);
127 FLAGS_logtostderr = true;
128 InitGoogleLogging(argv[0]);
129 if (FLAGS_demangle_filter) {
130 // Read from cin and write to cout.
132 while (getline(cin, line, '\n')) {
133 cout << DemangleIt(line.c_str()) << endl;
136 } else if (argc > 1) {
137 cout << DemangleIt(argv[1]) << endl;
140 return RUN_ALL_TESTS();