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[Tinycc-devel] tcc segmentation fault with thread local storage?

From: Taisuke Yamada
Subject: [Tinycc-devel] tcc segmentation fault with thread local storage?
Date: Thu, 07 Sep 2006 13:42:18 +0900
User-agent: Thunderbird (Windows/20060719)


I found tcc segfaults when trying to "-run" pthread-based
C script on Debian (sid, i386) platform, but can compile and
generate correct executable. Following is an example of such

  #!/usr/bin/tcc -run -lpthread
  int main() { return 0; }

It does not matter what code you have in a script - it's what
you link that seems to matter. In above case, it's libpthread
that triggers SEGV error (in __pthread_initialize_minimal).

After some investigation, the cause was TLS (Thread Local Storage)
feature enabled in glibc. The problem disappears when I do

  mv /lib/tls /lib/tls.disabled

Is this a known issue? I searched through the list archive with
various related keywords, but was unable to find such a report.

I still have no idea why tcc fails to run script in-place while
it can generate correct executable without "-run" option.
Is there any workaround to this problem, other than disabling TLS?

Thanks in advance.
Taisuke Yamada <address@hidden>, http://rakugaki.org/
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