forked from OSchip/llvm-project
32208555af
Reading modules first reads each control block in the chain and then all AST blocks. The first phase is intended to find recoverable errors, eg. an out of date or missing module. If any error occurs during this phase, it is safe to remove all modules in the chain as no references to them will exist. While reading the AST blocks, however, various fields in ASTReader are updated with references to the module. Removing modules at this point can cause dangling pointers which can be accessed later. These would be otherwise harmless, eg. a binary search over `GlobalSLocEntryMap` may access a failed module that could error, but shouldn't crash. Do not remove modules in this phase, regardless of failures. Since this is the case, it also doesn't make sense to return OutOfDate during this phase, so remove the two cases where this happens. When they were originally added these checks would return a failure when the serialized and current path didn't match up. That was updated to an OutOfDate as it was found to be hit when using VFS and overriding the umbrella. Later on the path was changed to instead be the name as written in the module file, resolved using the serialized base directory. At this point the check is really only comparing the name of the umbrella and only works for frameworks since those don't include `Headers/` in the name (which means the resolved path will never exist) Given all that, it seems safe to ignore this case entirely for now. This makes the handling of an umbrella header/directory the same as regular headers, which also don't check for differences in the path caused by VFS. Resolves rdar://79329355 Differential Revision: https://reviews.llvm.org/D107690 |
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| .. | ||
| Inputs | ||
| broken-vfs-module-dep.c | ||
| directory.c | ||
| external-names.c | ||
| framework-import.m | ||
| implicit-include.c | ||
| include-mixed-real-and-virtual.c | ||
| include-real-from-virtual.c | ||
| include-virtual-from-real.c | ||
| include.c | ||
| incomplete-umbrella.m | ||
| module-header-mismatches.m | ||
| module-import.m | ||
| module_missing_vfs.m | ||
| parse-errors.c | ||
| real-path-found-first.m | ||
| relative-path.c | ||
| subframework-symlink.m | ||
| test_nonmodular.c | ||
| umbrella-framework-import-skipnonexist.m | ||
| vfsroot-include.c | ||
| vfsroot-module.m | ||
| vfsroot-with-overlay.c | ||