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 #ifdef __APPLE__
  17 # include <crt_externs.h>
  18 #else
  19 // Forward declare environ in case it's not provided by stdlib.h.
  20 extern char **environ;
  21 #endif
  22
  23 namespace {
  24
  25 using namespace llvm;
  26 using namespace sys;
  27
  28 static cl::opt<std::string>
  29 ProgramTestStringArg1("program-test-string-arg1");
  30 static cl::opt<std::string>
  31 ProgramTestStringArg2("program-test-string-arg2");
  32
  33 static void CopyEnvironment(std::vector<const char *> &out) {
  34 #ifdef __APPLE__
  35   // _NSGetEnviron() only works from the main exe on Mac.  Fortunately the test
  36   // should be in the executable.
  37   char **envp = *_NSGetEnviron();
  38 #else
  39   // environ seems to work for Windows and most other Unices.
  40   char **envp = environ;
  41 #endif
  42   while (*envp != 0) {
  43     out.push_back(*envp);
  44     ++envp;
  45   }
  46 }
  47
  48 TEST(ProgramTest, CreateProcessTrailingSlash) {
  49   if (getenv("LLVM_PROGRAM_TEST_CHILD")) {
  50     if (ProgramTestStringArg1 == "has\\\\ trailing\\" &&
  51         ProgramTestStringArg2 == "has\\\\ trailing\\") {
  52       exit(0);  // Success!  The arguments were passed and parsed.
  53     }
  54     exit(1);
  55   }
  56
  57   // FIXME: Hardcoding argv0 here since I don't know a good cross-platform way
  58   // to get it.  Maybe ParseCommandLineOptions() should save it?
  59   Path my_exe = Path::GetMainExecutable("SupportTests", &ProgramTestStringArg1);
  60   const char *argv[] = {
  61     my_exe.c_str(),
  62     "--gtest_filter=ProgramTest.CreateProcessTrailingSlashChild",
  63     "-program-test-string-arg1", "has\\\\ trailing\\",
  64     "-program-test-string-arg2", "has\\\\ trailing\\",
  65     0
  66   };
  67
  68   // Add LLVM_PROGRAM_TEST_CHILD to the environment of the child.
  69   std::vector<const char *> envp;
  70   CopyEnvironment(envp);
  71   envp.push_back("LLVM_PROGRAM_TEST_CHILD=1");
  72   envp.push_back(0);
  73
  74   std::string error;
  75   bool ExecutionFailed;
  76   // Redirect stdout and stdin to NUL, but let stderr through.
  77 #ifdef LLVM_ON_WIN32
  78   Path nul("NUL");
  79 #else
  80   Path nul("/dev/null");
  81 #endif
  82   const Path *redirects[] = { &nul, &nul, 0 };
  83   int rc = Program::ExecuteAndWait(my_exe, argv, &envp[0], redirects,
  84                                    /*secondsToWait=*/10, /*memoryLimit=*/0,
  85                                    &error, &ExecutionFailed);
  86   EXPECT_FALSE(ExecutionFailed) << error;
  87   EXPECT_EQ(0, rc);
  88 }
  89
  90 } // end anonymous namespace