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/PathV1.h"
  14 #include "llvm/Support/Program.h"
  15 #include "gtest/gtest.h"
  16
  17 #include <stdlib.h>
  18 #if defined(__APPLE__)
  19 # include <crt_externs.h>
  20 #elif !defined(_MSC_VER)
  21 // Forward declare environ in case it's not provided by stdlib.h.
  22 extern char **environ;
  23 #endif
  24
  25 // From TestMain.cpp.
  26 extern const char *TestMainArgv0;
  27
  28 namespace {
  29
  30 using namespace llvm;
  31 using namespace sys;
  32
  33 static cl::opt<std::string>
  34 ProgramTestStringArg1("program-test-string-arg1");
  35 static cl::opt<std::string>
  36 ProgramTestStringArg2("program-test-string-arg2");
  37
  38 static void CopyEnvironment(std::vector<const char *> &out) {
  39 #ifdef __APPLE__
  40   char **envp = *_NSGetEnviron();
  41 #else
  42   // environ seems to work for Windows and most other Unices.
  43   char **envp = environ;
  44 #endif
  45   while (*envp != 0) {
  46     out.push_back(*envp);
  47     ++envp;
  48   }
  49 }
  50
  51 TEST(ProgramTest, CreateProcessTrailingSlash) {
  52   if (getenv("LLVM_PROGRAM_TEST_CHILD")) {
  53     if (ProgramTestStringArg1 == "has\\\\ trailing\\" &&
  54         ProgramTestStringArg2 == "has\\\\ trailing\\") {
  55       exit(0);  // Success!  The arguments were passed and parsed.
  56     }
  57     exit(1);
  58   }
  59
  60   std::string my_exe =
  61       sys::fs::getMainExecutable(TestMainArgv0, &ProgramTestStringArg1);
  62   const char *argv[] = {
  63     my_exe.c_str(),
  64     "--gtest_filter=ProgramTest.CreateProcessTrailingSlashChild",
  65     "-program-test-string-arg1", "has\\\\ trailing\\",
  66     "-program-test-string-arg2", "has\\\\ trailing\\",
  67     0
  68   };
  69
  70   // Add LLVM_PROGRAM_TEST_CHILD to the environment of the child.
  71   std::vector<const char *> envp;
  72   CopyEnvironment(envp);
  73   envp.push_back("LLVM_PROGRAM_TEST_CHILD=1");
  74   envp.push_back(0);
  75
  76   std::string error;
  77   bool ExecutionFailed;
  78   // Redirect stdout and stdin to NUL, but let stderr through.
  79 #ifdef LLVM_ON_WIN32
  80   StringRef nul("NUL");
  81 #else
  82   StringRef nul("/dev/null");
  83 #endif
  84   const StringRef *redirects[] = { &nul, &nul, 0 };
  85   int rc = ExecuteAndWait(my_exe, argv, &envp[0], redirects,
  86                           /*secondsToWait=*/ 10, /*memoryLimit=*/ 0, &error,
  87                           &ExecutionFailed);
  88   EXPECT_FALSE(ExecutionFailed) << error;
  89   EXPECT_EQ(0, rc);
  90 }
  91
  92 } // end anonymous namespace