From 346dfbe2bce57f7d0bb27d24fe3fdd7ae1f50701 Mon Sep 17 00:00:00 2001 From: George Karpenkov Date: Fri, 20 Jul 2018 20:21:57 +0000 Subject: [FileCheck] Provide an option for FileCheck to dump original input to stderr on failure The option can be either set using environment variable (e.g. env FILECHECK_DUMP_INPUT_ON_FAILURE=1 ninja check-fuzzer) or with a FileCheck flag. This can be extremely useful for debugging, cf. https://groups.google.com/forum/#!topic/llvm-dev/kLrzg8OM_h8 for discussion. Differential Revision: https://reviews.llvm.org/D49328 llvm-svn: 337609 --- llvm/utils/FileCheck/FileCheck.cpp | 13 ++++++++++++- 1 file changed, 12 insertions(+), 1 deletion(-) (limited to 'llvm/utils/FileCheck/FileCheck.cpp') diff --git a/llvm/utils/FileCheck/FileCheck.cpp b/llvm/utils/FileCheck/FileCheck.cpp index 60b71200dd54..b9cd99e8ffd5 100644 --- a/llvm/utils/FileCheck/FileCheck.cpp +++ b/llvm/utils/FileCheck/FileCheck.cpp @@ -97,6 +97,13 @@ static cl::opt VerboseVerbose( "vv", cl::init(false), cl::desc("Print information helpful in diagnosing internal FileCheck\n" "issues. Implies -v.\n")); +static const char * DumpInputEnv = "FILECHECK_DUMP_INPUT_ON_FAILURE"; + +static cl::opt DumpInputOnFailure( + "dump-input-on-failure", cl::init(std::getenv(DumpInputEnv)), + cl::desc("Dump original input to stderr before failing.\n" + "The value can be also controlled using\n" + "FILECHECK_DUMP_INPUT_ON_FAILURE environment variable.\n")); typedef cl::list::const_iterator prefix_iterator; @@ -1605,5 +1612,9 @@ int main(int argc, char **argv) { InputFileText, InputFile.getBufferIdentifier()), SMLoc()); - return CheckInput(SM, InputFileText, CheckStrings) ? EXIT_SUCCESS : 1; + int ExitCode = CheckInput(SM, InputFileText, CheckStrings) ? EXIT_SUCCESS : 1; + if (ExitCode == 1 && DumpInputOnFailure) + errs() << "Full input was:\n<<<<<<\n" << InputFileText << "\n>>>>>>\n"; + + return ExitCode; } -- cgit v1.2.3