PengZheng commented on PR #591:
URL: https://github.com/apache/celix/pull/591#issuecomment-1653548171
Most of GOTOs are eliminated by this PR. But there are some exceptions, one
of which is `celix_bundleArchive_create`:
```C
store_prop_failed:
revision_failed:
dir_failed:
if (!isSystemBundle) {
celix_utils_deleteDirectory(archive->archiveRoot, NULL);
}
init_failed:
bundleArchive_destroy(archive);
calloc_failed:
framework_logIfError(fw->logger, status, error, "Could not create
archive.");
return status;
```
It does not really produce anything reusable by wrapping
`celix_utils_deleteDirectory`.
IMHO, it should be wrapped in an ad hoc lambda expression, which we don't
have in C.
The best we have is Apple "blocks" extension, which GCC does not support.
GCC does have nested functions, which unfortunately require executable
stack, which is a security hole.
The most important lesson I learned along the way is that **we shall NEVER
mix the usage of GOTOs and auto variables**.
The following is very dangerous, since cleanup function of an uninitialized
auto variable will be triggered and a crash will follow:
```C
if(error) {
goto exit;
}
celix_autofree char* buf = malloc(4);
// omitted
exit:
return 1;
```
--
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
To unsubscribe, e-mail: [email protected]
For queries about this service, please contact Infrastructure at:
[email protected]
