[libcxx-commits] [compiler-rt] [libcxx] [mlir] [llvm] [clang] [asan] Enable StackSafetyAnalysis by default (PR #77210)
Fangrui Song via libcxx-commits
libcxx-commits at lists.llvm.org
Thu Jan 11 12:38:58 PST 2024
MaskRay wrote:
> Reverted at [e7f7948](https://github.com/llvm/llvm-project/commit/e7f794875169811f3801fad6d40bb9fe833e1a69). Will file an issue to track it once reducing is done.
I've reduced it. It's code like below where a memcpy confused StackSafetyAnalysis in a macOS+libc++ build.
```cpp
int floatsuffix_check(TParseContext *context)
{
struct yyguts_t *yyg = (struct yyguts_t *)context->getScanner();
if (context->getShaderVersion() < 300)
{
context->error(*yyg->yylloc_r, "Floating-point suffix unsupported prior to GLSL ES 3.00", yyg->yytext_r);
return 0;
}
std::string text = yyg->yytext_r;
text.resize(text.size() - 1); /////////
if (!strtof_clamp(text, &(yyg->yylval_r->lex.f)))
yyg->yyextra_r->warning(*yyg->yylloc_r, "Float overflow", yyg->yytext_r);
return (FLOATCONSTANT);
}
```
https://github.com/llvm/llvm-project/pull/77210
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