Problem with GC and address/leak sanitizer (page 2)

On 2/17/2025 8:55 PM, Steven Schveighoffer wrote: > On Monday, 17 February 2025 at 22:14:13 UTC, Walter Bright wrote: >> Is this an issue with the new GC, or the old one? > > Old gc I'm a little surprised to see a problem crop up after 25 years of continuous use? Perhaps try an older release of the compiler?

On 18/02/2025 6:22 PM, Walter Bright wrote: > On 2/17/2025 8:55 PM, Steven Schveighoffer wrote: >> On Monday, 17 February 2025 at 22:14:13 UTC, Walter Bright wrote: >>> Is this an issue with the new GC, or the old one? >> >> Old gc > > I'm a little surprised to see a problem crop up after 25 years of continuous use? > > Perhaps try an older release of the compiler? This has already been solved, see Johan's comments. ASAN with a fake stack isn't operating properly.

February 18

Re: Problem with GC and address/leak sanitizer

Posted by Johan
in reply to Luís Marques

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Johan

Posted in reply to Luís Marques

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On Monday, 17 February 2025 at 21:56:29 UTC, Luís Marques wrote:

On Sunday, 16 February 2025 at 22:40:58 UTC, Luís Marques wrote:

On Sunday, 16 February 2025 at 22:06:37 UTC, Johan wrote:

This used to work, but somehow does not work anymore since LDC 2.100 (I perhaps have forgotten about this and just noticed it). [2]

You are very welcome to help investigate why it is no longer working!

Sure, I'll have a look. Thanks.

I don't think this broke with the D 2.100. For instance, LDC 1.29.0 is based on 2.099.1 and exhibits the same problem. Even older LDC versions don't trip on this exact program but they do output AddressSanitizer CHECK failures.

==4108825==AddressSanitizer CHECK failed: /home/vsts/work/1/s/compiler-rt/lib/sanitizer_common/sanitizer_linux_libcdep.cpp:556 "((*tls_addr + *tls_size)) <= ((*stk_addr + *stk_size))" (0x78927e371080, 0x78927e371000)

I'll need some time to dig through the IR, the GC, etc.

It is likely related to LLVM version. Did you already check that? Possibly a subtle change in API.

If you are going to look at this, please let me know, to avoid duplicate efforts.

Not soon, no.

-Johan

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