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