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