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[FileCheck] Provide an option for FileCheck to dump original input to stderr on failure

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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
This commit is contained in:
George Karpenkov 2018-07-20 20:21:57 +00:00
parent 64ad8450c2
commit 56b2870853
4 changed files with 35 additions and 2 deletions
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4
docs/CommandGuide/FileCheck.rst
View File

@ -77,6 +77,10 @@ OPTIONS
-verify``. With this option FileCheck will verify that input does not contain
warnings not covered by any ``CHECK:`` patterns.
.. option:: --dump-input-on-failure
When the check fails, dump all of the original input.
.. option:: --enable-var-scope
Enables scope for regex variables.

17
test/FileCheck/verbose_mode.txt Normal file
View File

@ -0,0 +1,17 @@
; RUN: not FileCheck -input-file %s %s --check-prefix=CHECK1 --match-full-lines --dump-input-on-failure 2>&1 | FileCheck %s --check-prefix=CHECKERROR --match-full-lines
; RUN: env FILECHECK_DUMP_INPUT_ON_FAILURE=1 not FileCheck -input-file %s %s --check-prefix=CHECK1 --match-full-lines 2>&1 | FileCheck %s --check-prefix=CHECKERROR --match-full-lines
; RUN: env FILECHECK_DUMP_INPUT_ON_FAILURE=1 not FileCheck -input-file %s %s --check-prefix=CHECK1 --match-full-lines --dump-input-on-failure=0 2>&1 | FileCheck %s --check-prefix=CHECKERRORNOVERBOSE --match-full-lines
hello
world
; CHECK1: ciao
; CHECK1-NEXT: world
; CHECKERROR: Full input was:
; CHECKERROR-NEXT: <<<<<<
; CHECKERROR: hello
; CHECKERROR: world
; CHECKERROR: >>>>>>
; CHECKERRORNOVERBOSE-NOT: <<<<<<

13
utils/FileCheck/FileCheck.cpp
View File

@ -97,6 +97,13 @@ static cl::opt<bool> 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<bool> 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<std::string>::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;
}

3
utils/lit/lit/TestingConfig.py
View File

@ -25,7 +25,8 @@ class TestingConfig:
'CLANG', 'LD_PRELOAD', 'ASAN_OPTIONS', 'UBSAN_OPTIONS',
'LSAN_OPTIONS', 'ADB', 'ANDROID_SERIAL',
'SANITIZER_IGNORE_CVE_2016_2143', 'TMPDIR', 'TMP', 'TEMP',
'TEMPDIR', 'AVRLIT_BOARD', 'AVRLIT_PORT']
'TEMPDIR', 'AVRLIT_BOARD', 'AVRLIT_PORT',
'FILECHECK_DUMP_INPUT_ON_FAILURE']
for var in pass_vars:
val = os.environ.get(var, '')
# Check for empty string as some variables such as LD_PRELOAD cannot be empty