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      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
     92