1//===- llvm/unittest/Support/CommandLineTest.cpp - CommandLine tests ------===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9
10#include "llvm/ADT/STLExtras.h"
11#include "llvm/Config/config.h"
12#include "llvm/Support/CommandLine.h"
13#include "gtest/gtest.h"
14#include <stdlib.h>
15#include <string>
16
17using namespace llvm;
18
19namespace {
20
21class TempEnvVar {
22 public:
23  TempEnvVar(const char *name, const char *value)
24      : name(name) {
25    const char *old_value = getenv(name);
26    EXPECT_EQ(nullptr, old_value) << old_value;
27#if HAVE_SETENV
28    setenv(name, value, true);
29#else
30#   define SKIP_ENVIRONMENT_TESTS
31#endif
32  }
33
34  ~TempEnvVar() {
35#if HAVE_SETENV
36    // Assume setenv and unsetenv come together.
37    unsetenv(name);
38#endif
39  }
40
41 private:
42  const char *const name;
43};
44
45template <typename T>
46class StackOption : public cl::opt<T> {
47  typedef cl::opt<T> Base;
48public:
49  // One option...
50  template<class M0t>
51  explicit StackOption(const M0t &M0) : Base(M0) {}
52
53  // Two options...
54  template<class M0t, class M1t>
55  StackOption(const M0t &M0, const M1t &M1) : Base(M0, M1) {}
56
57  // Three options...
58  template<class M0t, class M1t, class M2t>
59  StackOption(const M0t &M0, const M1t &M1, const M2t &M2) : Base(M0, M1, M2) {}
60
61  // Four options...
62  template<class M0t, class M1t, class M2t, class M3t>
63  StackOption(const M0t &M0, const M1t &M1, const M2t &M2, const M3t &M3)
64    : Base(M0, M1, M2, M3) {}
65
66  ~StackOption() {
67    this->removeArgument();
68  }
69};
70
71
72cl::OptionCategory TestCategory("Test Options", "Description");
73cl::opt<int> TestOption("test-option", cl::desc("old description"));
74TEST(CommandLineTest, ModifyExisitingOption) {
75  const char Description[] = "New description";
76  const char ArgString[] = "new-test-option";
77  const char ValueString[] = "Integer";
78
79  StringMap<cl::Option*> Map;
80  cl::getRegisteredOptions(Map);
81
82  ASSERT_TRUE(Map.count("test-option") == 1) <<
83    "Could not find option in map.";
84
85  cl::Option *Retrieved = Map["test-option"];
86  ASSERT_EQ(&TestOption, Retrieved) << "Retrieved wrong option.";
87
88  ASSERT_EQ(&cl::GeneralCategory,Retrieved->Category) <<
89    "Incorrect default option category.";
90
91  Retrieved->setCategory(TestCategory);
92  ASSERT_EQ(&TestCategory,Retrieved->Category) <<
93    "Failed to modify option's option category.";
94
95  Retrieved->setDescription(Description);
96  ASSERT_STREQ(Retrieved->HelpStr, Description) <<
97    "Changing option description failed.";
98
99  Retrieved->setArgStr(ArgString);
100  ASSERT_STREQ(ArgString, Retrieved->ArgStr) <<
101    "Failed to modify option's Argument string.";
102
103  Retrieved->setValueStr(ValueString);
104  ASSERT_STREQ(Retrieved->ValueStr, ValueString) <<
105    "Failed to modify option's Value string.";
106
107  Retrieved->setHiddenFlag(cl::Hidden);
108  ASSERT_EQ(cl::Hidden, TestOption.getOptionHiddenFlag()) <<
109    "Failed to modify option's hidden flag.";
110}
111#ifndef SKIP_ENVIRONMENT_TESTS
112
113const char test_env_var[] = "LLVM_TEST_COMMAND_LINE_FLAGS";
114
115cl::opt<std::string> EnvironmentTestOption("env-test-opt");
116TEST(CommandLineTest, ParseEnvironment) {
117  TempEnvVar TEV(test_env_var, "-env-test-opt=hello");
118  EXPECT_EQ("", EnvironmentTestOption);
119  cl::ParseEnvironmentOptions("CommandLineTest", test_env_var);
120  EXPECT_EQ("hello", EnvironmentTestOption);
121}
122
123// This test used to make valgrind complain
124// ("Conditional jump or move depends on uninitialised value(s)")
125//
126// Warning: Do not run any tests after this one that try to gain access to
127// registered command line options because this will likely result in a
128// SEGFAULT. This can occur because the cl::opt in the test below is declared
129// on the stack which will be destroyed after the test completes but the
130// command line system will still hold a pointer to a deallocated cl::Option.
131TEST(CommandLineTest, ParseEnvironmentToLocalVar) {
132  // Put cl::opt on stack to check for proper initialization of fields.
133  StackOption<std::string> EnvironmentTestOptionLocal("env-test-opt-local");
134  TempEnvVar TEV(test_env_var, "-env-test-opt-local=hello-local");
135  EXPECT_EQ("", EnvironmentTestOptionLocal);
136  cl::ParseEnvironmentOptions("CommandLineTest", test_env_var);
137  EXPECT_EQ("hello-local", EnvironmentTestOptionLocal);
138}
139
140#endif  // SKIP_ENVIRONMENT_TESTS
141
142TEST(CommandLineTest, UseOptionCategory) {
143  StackOption<int> TestOption2("test-option", cl::cat(TestCategory));
144
145  ASSERT_EQ(&TestCategory,TestOption2.Category) << "Failed to assign Option "
146                                                  "Category.";
147}
148
149class StrDupSaver : public cl::StringSaver {
150  const char *SaveString(const char *Str) override {
151    return strdup(Str);
152  }
153};
154
155typedef void ParserFunction(StringRef Source, llvm::cl::StringSaver &Saver,
156                            SmallVectorImpl<const char *> &NewArgv);
157
158
159void testCommandLineTokenizer(ParserFunction *parse, const char *Input,
160                              const char *const Output[], size_t OutputSize) {
161  SmallVector<const char *, 0> Actual;
162  StrDupSaver Saver;
163  parse(Input, Saver, Actual);
164  EXPECT_EQ(OutputSize, Actual.size());
165  for (unsigned I = 0, E = Actual.size(); I != E; ++I) {
166    if (I < OutputSize)
167      EXPECT_STREQ(Output[I], Actual[I]);
168    free(const_cast<char *>(Actual[I]));
169  }
170}
171
172TEST(CommandLineTest, TokenizeGNUCommandLine) {
173  const char *Input = "foo\\ bar \"foo bar\" \'foo bar\' 'foo\\\\bar' "
174                      "foo\"bar\"baz C:\\src\\foo.cpp \"C:\\src\\foo.cpp\"";
175  const char *const Output[] = { "foo bar", "foo bar", "foo bar", "foo\\bar",
176                                 "foobarbaz", "C:\\src\\foo.cpp",
177                                 "C:\\src\\foo.cpp" };
178  testCommandLineTokenizer(cl::TokenizeGNUCommandLine, Input, Output,
179                           array_lengthof(Output));
180}
181
182TEST(CommandLineTest, TokenizeWindowsCommandLine) {
183  const char *Input = "a\\b c\\\\d e\\\\\"f g\" h\\\"i j\\\\\\\"k \"lmn\" o pqr "
184                      "\"st \\\"u\" \\v";
185  const char *const Output[] = { "a\\b", "c\\\\d", "e\\f g", "h\"i", "j\\\"k",
186                                 "lmn", "o", "pqr", "st \"u", "\\v" };
187  testCommandLineTokenizer(cl::TokenizeWindowsCommandLine, Input, Output,
188                           array_lengthof(Output));
189}
190
191TEST(CommandLineTest, AliasesWithArguments) {
192  static const size_t ARGC = 3;
193  const char *const Inputs[][ARGC] = {
194    { "-tool", "-actual=x", "-extra" },
195    { "-tool", "-actual", "x" },
196    { "-tool", "-alias=x", "-extra" },
197    { "-tool", "-alias", "x" }
198  };
199
200  for (size_t i = 0, e = array_lengthof(Inputs); i < e; ++i) {
201    StackOption<std::string> Actual("actual");
202    StackOption<bool> Extra("extra");
203    StackOption<std::string> Input(cl::Positional);
204
205    cl::alias Alias("alias", llvm::cl::aliasopt(Actual));
206
207    cl::ParseCommandLineOptions(ARGC, Inputs[i]);
208    EXPECT_EQ("x", Actual);
209    EXPECT_EQ(0, Input.getNumOccurrences());
210
211    Alias.removeArgument();
212  }
213}
214
215}  // anonymous namespace
216