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[clang-tidy] check_clang_tidy.py: support CHECK-NOTES prefix 

Summary:
Currently, there is two configured prefixes: `CHECK-FIXES` and `CHECK-MESSAGES`
`CHECK-MESSAGES` checks that there are no test output lines with `warning:|error:`, which are not explicitly handled in lit tests.
However there does not seem to be a nice way to enforce for all the `note:` to be checked.
This was useful for me when developing D36836.

Reviewers: alexfh, klimek, aaron.ballman, hokein

Reviewed By: alexfh, aaron.ballman

Subscribers: JonasToth, JDevlieghere, xazax.hun, cfe-commits

Tags: #clang-tools-extra

Differential Revision: https://reviews.llvm.org/D36892

llvm-svn: 339437
This commit is contained in:
Roman Lebedev 2018-08-10 15:05:46 +00:00
parent a17721cf5d
commit 70fcafc096
3 changed files with 48 additions and 28 deletions
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3
clang-tools-extra/docs/clang-tidy/index.rst
View File

@ -650,7 +650,8 @@ clang-tidy tests.
An additional check enabled by ``check_clang_tidy.py`` ensures that
if `CHECK-MESSAGES:` is used in a file then every warning or error
must have an associated CHECK in that file.
must have an associated CHECK in that file. Or, you can use ``CHECK-NOTES:``
instead, if you want to **also** ensure that all the notes are checked.
To use the ``check_clang_tidy.py`` script, put a .cpp file with the
appropriate ``RUN`` line in the ``test/clang-tidy`` directory. Use

20
clang-tools-extra/test/clang-tidy/check_clang_tidy.py
View File

@ -78,6 +78,7 @@ def main():
file_check_suffix = ('-' + args.check_suffix) if args.check_suffix else ''
check_fixes_prefix = 'CHECK-FIXES' + file_check_suffix
check_messages_prefix = 'CHECK-MESSAGES' + file_check_suffix
check_notes_prefix = 'CHECK-NOTES' + file_check_suffix
# Tests should not rely on STL being available, and instead provide mock
# implementations of relevant APIs.
@ -91,9 +92,11 @@ def main():
has_check_fixes = check_fixes_prefix in input_text
has_check_messages = check_messages_prefix in input_text
has_check_notes = check_notes_prefix in input_text
if not has_check_fixes and not has_check_messages:
sys.exit('Neither %s nor %s found in the input' % (check_fixes_prefix, check_messages_prefix) )
if not has_check_fixes and not has_check_messages and not has_check_notes:
sys.exit('%s, %s or %s not found in the input' % (check_fixes_prefix,
check_messages_prefix, check_notes_prefix) )
# Remove the contents of the CHECK lines to avoid CHECKs matching on
# themselves. We need to keep the comments to preserve line numbers while
@ -156,5 +159,18 @@ def main():
print('FileCheck failed:\n' + e.output.decode())
raise
if has_check_notes:
notes_file = temp_file_name + '.notes'
write_file(notes_file, clang_tidy_output)
try:
subprocess.check_output(
['FileCheck', '-input-file=' + notes_file, input_file_name,
'-check-prefix=' + check_notes_prefix,
'-implicit-check-not={{note|warning|error}}:'],
stderr=subprocess.STDOUT)
except subprocess.CalledProcessError as e:
print('FileCheck failed:\n' + e.output.decode())
raise
if __name__ == '__main__':
main()

53
clang-tools-extra/test/clang-tidy/hicpp-exception-baseclass.cpp
View File

@ -20,28 +20,28 @@ class really_creative : public non_derived_exception, private std::exception {};
void problematic() {
try {
throw int(42);
// CHECK-MESSAGES: [[@LINE-1]]:11: warning: throwing an exception whose type 'int' is not derived from 'std::exception'
// CHECK-NOTES: [[@LINE-1]]:11: warning: throwing an exception whose type 'int' is not derived from 'std::exception'
} catch (int e) {
}
throw int(42);
// CHECK-MESSAGES: [[@LINE-1]]:9: warning: throwing an exception whose type 'int' is not derived from 'std::exception'
// CHECK-NOTES: [[@LINE-1]]:9: warning: throwing an exception whose type 'int' is not derived from 'std::exception'
try {
throw 12;
// CHECK-MESSAGES: [[@LINE-1]]:11: warning: throwing an exception whose type 'int' is not derived from 'std::exception'
// CHECK-NOTES: [[@LINE-1]]:11: warning: throwing an exception whose type 'int' is not derived from 'std::exception'
} catch (...) {
throw; // Ok, even if the type is not known, conforming code can never rethrow a non-std::exception object.
}
try {
throw non_derived_exception();
// CHECK-MESSAGES: [[@LINE-1]]:11: warning: throwing an exception whose type 'non_derived_exception' is not derived from 'std::exception'
// CHECK-MESSAGES: 9:1: note: type defined here
// CHECK-NOTES: [[@LINE-1]]:11: warning: throwing an exception whose type 'non_derived_exception' is not derived from 'std::exception'
// CHECK-NOTES: 9:1: note: type defined here
} catch (non_derived_exception &e) {
}
throw non_derived_exception();
// CHECK-MESSAGES: [[@LINE-1]]:9: warning: throwing an exception whose type 'non_derived_exception' is not derived from 'std::exception'
// CHECK-MESSAGES: 9:1: note: type defined here
// CHECK-NOTES: [[@LINE-1]]:9: warning: throwing an exception whose type 'non_derived_exception' is not derived from 'std::exception'
// CHECK-NOTES: 9:1: note: type defined here
// FIXME: More complicated kinds of inheritance should be checked later, but there is
// currently no way use ASTMatchers for this kind of task.
@ -100,15 +100,15 @@ void allowed_throws() {
// Templated function that throws exception based on template type
template <typename T>
void ThrowException() { throw T(); }
// CHECK-MESSAGES: [[@LINE-1]]:31: warning: throwing an exception whose type 'bad_generic_exception<int>' is not derived from 'std::exception'
// CHECK-MESSAGES: 120:1: note: type defined here
// CHECK-MESSAGES: [[@LINE-3]]:31: warning: throwing an exception whose type 'bad_generic_exception<std::exception>' is not derived from 'std::exception'
// CHECK-MESSAGES: 120:1: note: type defined here
// CHECK-MESSAGES: [[@LINE-5]]:31: warning: throwing an exception whose type 'exotic_exception<non_derived_exception>' is not derived from 'std::exception'
// CHECK-MESSAGES: 123:1: note: type defined here
// CHECK-MESSAGES: [[@LINE-7]]:31: warning: throwing an exception whose type 'int' is not derived from 'std::exception'
// CHECK-MESSAGES: [[@LINE-8]]:31: warning: throwing an exception whose type 'non_derived_exception' is not derived from 'std::exception'
// CHECK-MESSAGES: 9:1: note: type defined here
// CHECK-NOTES: [[@LINE-1]]:31: warning: throwing an exception whose type 'bad_generic_exception<int>' is not derived from 'std::exception'
// CHECK-NOTES: 120:1: note: type defined here
// CHECK-NOTES: [[@LINE-3]]:31: warning: throwing an exception whose type 'bad_generic_exception<std::exception>' is not derived from 'std::exception'
// CHECK-NOTES: 120:1: note: type defined here
// CHECK-NOTES: [[@LINE-5]]:31: warning: throwing an exception whose type 'exotic_exception<non_derived_exception>' is not derived from 'std::exception'
// CHECK-NOTES: 123:1: note: type defined here
// CHECK-NOTES: [[@LINE-7]]:31: warning: throwing an exception whose type 'int' is not derived from 'std::exception'
// CHECK-NOTES: [[@LINE-8]]:31: warning: throwing an exception whose type 'non_derived_exception' is not derived from 'std::exception'
// CHECK-NOTES: 9:1: note: type defined here
#define THROW_EXCEPTION(CLASS) ThrowException<CLASS>()
#define THROW_BAD_EXCEPTION throw int(42);
#define THROW_GOOD_EXCEPTION throw std::exception();
@ -134,8 +134,8 @@ void generic_exceptions() {
THROW_EXCEPTION(deep_hierarchy); // Ok
THROW_BAD_EXCEPTION;
// CHECK-MESSAGES: [[@LINE-1]]:3: warning: throwing an exception whose type 'int' is not derived from 'std::exception'
// CHECK-MESSAGES: [[@LINE-25]]:35: note: expanded from macro 'THROW_BAD_EXCEPTION'
// CHECK-NOTES: [[@LINE-1]]:3: warning: throwing an exception whose type 'int' is not derived from 'std::exception'
// CHECK-NOTES: [[@LINE-25]]:35: note: expanded from macro 'THROW_BAD_EXCEPTION'
THROW_GOOD_EXCEPTION;
THROW_DERIVED_EXCEPTION;
@ -143,16 +143,19 @@ void generic_exceptions() {
THROW_EXCEPTION(generic_exception<float>); // Ok
throw bad_generic_exception<int>();
// CHECK-MESSAGES: [[@LINE-1]]:9: warning: throwing an exception whose type 'bad_generic_exception<int>' is not derived from 'std::exception'
// CHECK-NOTES: [[@LINE-1]]:9: warning: throwing an exception whose type 'bad_generic_exception<int>' is not derived from 'std::exception'
// CHECK-NOTES: 120:1: note: type defined here
throw bad_generic_exception<std::exception>();
// CHECK-MESSAGES: [[@LINE-1]]:9: warning: throwing an exception whose type 'bad_generic_exception<std::exception>' is not derived from 'std::exception'
// CHECK-NOTES: [[@LINE-1]]:9: warning: throwing an exception whose type 'bad_generic_exception<std::exception>' is not derived from 'std::exception'
// CHECK-NOTES: 120:1: note: type defined here
THROW_EXCEPTION(bad_generic_exception<int>);
// CHECK MESSAGES: [[@LINE-1]]:3: warning: throwing an exception whose type 'bad_generic_exception<int>' is not derived from 'std::exception'
THROW_EXCEPTION(bad_generic_exception<std::exception>);
// CHECK MESSAGES: [[@LINE-1]]:3: warning: throwing an exception whose type 'bad_generic_exception<std::exception>' is not derived from 'std::exception'
throw exotic_exception<non_derived_exception>();
// CHECK-MESSAGES: [[@LINE-1]]:9: warning: throwing an exception whose type 'exotic_exception<non_derived_exception>' is not derived from 'std::exception'
// CHECK-NOTES: [[@LINE-1]]:9: warning: throwing an exception whose type 'exotic_exception<non_derived_exception>' is not derived from 'std::exception'
// CHECK-NOTES: 123:1: note: type defined here
THROW_EXCEPTION(exotic_exception<non_derived_exception>);
// CHECK MESSAGES: [[@LINE-1]]:3: warning: throwing an exception whose type 'exotic_exception<non_derived_exception>' is not derived from 'std::exception'
@ -168,12 +171,12 @@ using UsingGood = deep_hierarchy;
void typedefed() {
throw TypedefedBad();
// CHECK-MESSAGES: [[@LINE-1]]:9: warning: throwing an exception whose type 'TypedefedBad' (aka 'int') is not derived from 'std::exception'
// CHECK-MESSAGES: 164:1: note: type defined here
// CHECK-NOTES: [[@LINE-1]]:9: warning: throwing an exception whose type 'TypedefedBad' (aka 'int') is not derived from 'std::exception'
// CHECK-NOTES: 167:1: note: type defined here
throw TypedefedGood(); // Ok
throw UsingBad();
// CHECK-MESSAGES: [[@LINE-1]]:9: warning: throwing an exception whose type 'UsingBad' (aka 'int') is not derived from 'std::exception'
// CHECK-MESSAGES: 166:1: note: type defined here
// CHECK-NOTES: [[@LINE-1]]:9: warning: throwing an exception whose type 'UsingBad' (aka 'int') is not derived from 'std::exception'
// CHECK-NOTES: 169:1: note: type defined here
throw UsingGood(); // Ok
}