bugTiny C Compiler - Bugs: bug #41917, libtcc_test segfault when compiled...


bug #41917: libtcc_test segfault when compiled with tcc

Submitter:  Domingo Alvarez Duarte <mingodad>
Submitted:  Fri 21 Mar 2014 01:27:20 AM UTC
Category:  None Severity:  3 - Normal
Item Group:  None Status:  None
Privacy:  Public Assigned to:  None
Open/Closed:  Open
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Fri 21 Mar 2014 01:27:20 AM UTC, original submission:  

Hello !

I'm using linux ubuntu 12.04 X86_64.

Testing my virtual io with tcc I found that the libtcc_test when compiled with tcc segfault if lib_path is not given.

tcc -o libtcc_test libtcc_test.c -L.. -ltcc -ldl
./libtcc_test lib_path=.. <<< here ok
./libtcc_test  <<< here segfault

But when compiled with gcc
./libtcc_test <<< here ok

I followed the error and it happens on error1 function, when try to access stderr, probably memory corrupted and the error happen here by side effect:

    if (!s1->error_func) {
        /* default case: stderr */
        fprintf(stderr, "%s\n", buf); <<<< when try to access stderr
    } else {
        s1->error_func(s1->error_opaque, buf);

Domingo Alvarez Duarte <mingodad>


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