balazske marked an inline comment as done.
balazske added inline comments.
================
Comment at: clang/lib/StaticAnalyzer/Checkers/MallocChecker.cpp:1687
+ if (ArgValKnown) {
+ if (!KernelZeroSizePtrValue)
+ KernelZeroSizePtrValue =
----------------
Szelethus wrote:
> balazske wrote:
> > Szelethus wrote:
> > > Szelethus wrote:
> > > > martong wrote:
> > > > > balazske wrote:
> > > > > > martong wrote:
> > > > > > > martong wrote:
> > > > > > > > This is a bit confusing for me. Perhaps alternatively we could
> > > > > > > > have a free function `isInitialized(KernelZero...)` instead. Or
> > > > > > > > maybe having a separate bool variable to indicate whether it
> > > > > > > > was initialized could be cleaner?
> > > > > > > Another idea: Adding a helper struct to contain the bool
> > > > > > > `initialized`? E.g. (draft):
> > > > > > > ```
> > > > > > > struct LazyOptional {
> > > > > > > bool initialized = false;
> > > > > > > Opt<int> value;
> > > > > > > Opt& get();
> > > > > > > void set(const Opt&);
> > > > > > > };
> > > > > > > ```
> > > > > > It may be OK to have a function `lazyInitKernelZeroSizePtrValue`?
> > > > > I don't insist, given we have a better described type for
> > > > > `KernelZeroSizePtrValue` (e.g. having a `using` `template`)
> > > > `AnalysisManager` has access to the `Preprocessor`, and it is also
> > > > responsible for the construction of the `CheckerManager` object. This
> > > > would make moving such code to the checker registry function! I'll
> > > > gladly take this issue off your hand and patch it in once
> > > > rG2aac0c47aed8d1eff7ab6d858173c532b881d948 settles :)
> > > Just pushed rG4dc8472942ce60f29de9587b9451cc3d49df7abf. It it settles (no
> > > buildbots complain), you could rebase and the lazy initialization could
> > > be a thing of the past! :)
> > This makes it possible to have a generic one-time initialization function
> > in the checker (`CheckerBase`)? The functionality is needed in more than
> > one checker, at least for the bug types it can be used in almost every
> > checker (that has bugtypes).
> I'm not sure I understand what you mean -- do you want to add
> `CheckerManager` to `CheckerBase`'s constructor?
>
> In any case, I remember reading something around `CheckerBase`'s or
> `BugType`'s implementation the way the checker receives its name is a bit
> tricky and not a part of the construction.
Initialization in register function does not work: The `MacroInfo` is not found
in the preprocessor. Probably the code is not parsed normally at that time. For
now only the lazy initialization is working.
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D76830/new/
https://reviews.llvm.org/D76830
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