llvm-capstone/clang/test/Analysis/cstring-syntax-cxx.cpp
Balazs Benics ffe7950ebc Reland "[analyzer] Deprecate -analyzer-store region flag"
I'm trying to remove unused options from the `Analyses.def` file, then
merge the rest of the useful options into the `AnalyzerOptions.def`.
Then make sure one can set these by an `-analyzer-config XXX=YYY` style
flag.
Then surface the `-analyzer-config` to the `clang` frontend;

After all of this, we can pursue the tablegen approach described
https://discourse.llvm.org/t/rfc-tablegen-clang-static-analyzer-engine-options-for-better-documentation/61488

In this patch, I'm proposing flag deprecations.
We should support deprecated analyzer flags for exactly one release. In
this case I'm planning to drop this flag in `clang-16`.

In the clang frontend, now we won't pass this option to the cc1
frontend, rather emit a warning diagnostic reminding the users about
this deprecated flag, which will be turned into error in clang-16.

Unfortunately, I had to remove all the tests referring to this flag,
causing a mass change. I've also added a test for checking this warning.

I've seen that `scan-build` also uses this flag, but I think we should
remove that part only after we turn this into a hard error.

Reviewed By: martong

Differential Revision: https://reviews.llvm.org/D126215
2022-06-14 09:20:41 +02:00

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C++

// RUN: %clang_analyze_cc1 -analyzer-checker=unix.cstring.BadSizeArg -verify %s
// expected-no-diagnostics
// Ensure we don't crash on C++ declarations with special names.
struct X {
X(int i): i(i) {}
int i;
};
X operator+(X a, X b) {
return X(a.i + b.i);
}
void test(X a, X b) {
X c = a + b;
}
// Ensure we don't crash on custom-defined strncat.
char strncat ();
int main () {
return strncat ();
}