unittests/Support/ProgramTest.cpp

   1 //===- unittest/Support/ProgramTest.cpp -----------------------------------===//
   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/Support/CommandLine.h"
  11 #include "llvm/Support/FileSystem.h"
  12 #include "llvm/Support/Path.h"
  13 #include "llvm/Support/Program.h"
  14 #include "gtest/gtest.h"
  15
  16 #include <stdlib.h>
  17 #if defined(__APPLE__)
  18 # include <crt_externs.h>
  19 #elif !defined(_MSC_VER)
  20 // Forward declare environ in case it's not provided by stdlib.h.
  21 extern char **environ;
  22 #endif
  23
  24 // From TestMain.cpp.
  25 extern const char *TestMainArgv0;
  26
  27 namespace {
  28
  29 using namespace llvm;
  30 using namespace sys;
  31
  32 static cl::opt<std::string>
  33 ProgramTestStringArg1("program-test-string-arg1");
  34 static cl::opt<std::string>
  35 ProgramTestStringArg2("program-test-string-arg2");
  36
  37 static void CopyEnvironment(std::vector<const char *> &out) {
  38 #ifdef __APPLE__
  39   char **envp = *_NSGetEnviron();
  40 #else
  41   // environ seems to work for Windows and most other Unices.
  42   char **envp = environ;
  43 #endif
  44   while (*envp != 0) {
  45     out.push_back(*envp);
  46     ++envp;
  47   }
  48 }
  49
  50 TEST(ProgramTest, CreateProcessTrailingSlash) {
  51   if (getenv("LLVM_PROGRAM_TEST_CHILD")) {
  52     if (ProgramTestStringArg1 == "has\\\\ trailing\\" &&
  53         ProgramTestStringArg2 == "has\\\\ trailing\\") {
  54       exit(0);  // Success!  The arguments were passed and parsed.
  55     }
  56     exit(1);
  57   }
  58
  59   std::string my_exe =
  60       sys::fs::getMainExecutable(TestMainArgv0, &ProgramTestStringArg1);
  61   const char *argv[] = {
  62     my_exe.c_str(),
  63     "--gtest_filter=ProgramTest.CreateProcessTrailingSlashChild",
  64     "-program-test-string-arg1", "has\\\\ trailing\\",
  65     "-program-test-string-arg2", "has\\\\ trailing\\",
  66     0
  67   };
  68
  69   // Add LLVM_PROGRAM_TEST_CHILD to the environment of the child.
  70   std::vector<const char *> envp;
  71   CopyEnvironment(envp);
  72   envp.push_back("LLVM_PROGRAM_TEST_CHILD=1");
  73   envp.push_back(0);
  74
  75   std::string error;
  76   bool ExecutionFailed;
  77   // Redirect stdout and stdin to NUL, but let stderr through.
  78 #ifdef LLVM_ON_WIN32
  79   StringRef nul("NUL");
  80 #else
  81   StringRef nul("/dev/null");
  82 #endif
  83   const StringRef *redirects[] = { &nul, &nul, 0 };
  84   int rc = ExecuteAndWait(my_exe, argv, &envp[0], redirects,
  85                           /*secondsToWait=*/ 10, /*memoryLimit=*/ 0, &error,
  86                           &ExecutionFailed);
  87   EXPECT_FALSE(ExecutionFailed) << error;
  88   EXPECT_EQ(0, rc);
  89 }
  90
  91 } // end anonymous namespace