[llvm] r180041 - [Support] Propagate the environment into the test child process

[David Dean]

I'm seeing the following build failure on multiple bots:

/Users/buildslave/zorg/buildbot/smooshlab/slave-0.8/build.clang-x86_64-darwin10-nobootstrap-RA/llvm/unittests/Support/ProgramTest.cpp:29:17: error: use of undeclared identifier 'environ'
  char **envp = environ;
                ^


On 22 Apr 2013, at 1:23 PM, Reid Kleckner <reid at kleckner.net> wrote:

> Author: rnk
> Date: Mon Apr 22 15:23:41 2013
> New Revision: 180041
> 
> URL: http://llvm.org/viewvc/llvm-project?rev=180041&view=rev
> Log:
> [Support] Propagate the environment into the test child process
> 
> Should fix the dragonegg bootstrap builder, which reasonably needs
> LD_LIBRARY_PATH to be set.
> 
> Modified:
>    llvm/trunk/unittests/Support/ProgramTest.cpp
> 
> Modified: llvm/trunk/unittests/Support/ProgramTest.cpp
> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/unittests/Support/ProgramTest.cpp?rev=180041&r1=180040&r2=180041&view=diff
> ==============================================================================
> --- llvm/trunk/unittests/Support/ProgramTest.cpp (original)
> +++ llvm/trunk/unittests/Support/ProgramTest.cpp Mon Apr 22 15:23:41 2013
> @@ -24,6 +24,15 @@ ProgramTestStringArg1("program-test-stri
> static cl::opt<std::string>
> ProgramTestStringArg2("program-test-string-arg2");
> 
> +static void CopyEnvironment(std::vector<const char *> out) {
> +  // environ appears to be pretty portable.
> +  char **envp = environ;
> +  while (*envp != 0) {
> +    out.push_back(*envp);
> +    ++envp;
> +  }
> +}
> +
> TEST(ProgramTest, CreateProcessTrailingSlash) {
>   if (getenv("LLVM_PROGRAM_TEST_CHILD")) {
>     if (ProgramTestStringArg1 == "has\\\\ trailing\\" &&
> @@ -43,7 +52,13 @@ TEST(ProgramTest, CreateProcessTrailingS
>     "-program-test-string-arg2", "has\\\\ trailing\\",
>     0
>   };
> -  const char *envp[] = { "LLVM_PROGRAM_TEST_CHILD=1", 0 };
> +
> +  // Add LLVM_PROGRAM_TEST_CHILD to the environment of the child.
> +  std::vector<const char *> envp;
> +  CopyEnvironment(envp);
> +  envp.push_back("LLVM_PROGRAM_TEST_CHILD=1");
> +  envp.push_back(0);
> +
>   std::string error;
>   bool ExecutionFailed;
>   // Redirect stdout and stdin to NUL, but let stderr through.
> @@ -53,7 +68,7 @@ TEST(ProgramTest, CreateProcessTrailingS
>   Path nul("/dev/null");
> #endif
>   const Path *redirects[] = { &nul, &nul, 0 };
> -  int rc = Program::ExecuteAndWait(my_exe, argv, envp, redirects,
> +  int rc = Program::ExecuteAndWait(my_exe, argv, &envp[0], redirects,
>                                    /*secondsToWait=*/10, /*memoryLimit=*/0,
>                                    &error, &ExecutionFailed);
>   EXPECT_FALSE(ExecutionFailed) << error;
> 
> 
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-David