[Tinycc-devel] bugs with dlopening tcc-produced .so

[Basile STARYNKEVITCH]

Dear All,

I wrote a small program (GPL license) on
http://starynkevitch.net/Basile/manydl.c which generate "randomly"
some C code, compile and dlopen it. Originally, I wrote it for
benching dlopen (and I found that you can dlopen 30_000 shared objects
together!). To compile this program, just
  gcc -Wall -rdynamic -O manydl.c -ldl -o manydl
To run this program, you can specify the number of generated files and
their mean length. For example,
  ./manydl 50 1200

generate 50 files (ie 50 C sources and their corresponding .so), named
genf_A0.c ... genf_D3.c ... of mean length about 1200 lines.

You can change the C compiler (default is gcc) used inside manydl to
compile the generated C sources with the CC environment
variable. Likewise, you can change the C options (in addition of -fPIC
-shared) with the CFLAGS environment variable. So running

  env CC=gcc-3.4 CFLAGS=-O2 ./manydl 30 1600
generate 30 functions (each in its C file) of mean length 1600 lines
(approximately) and compile them with gcc-3.4 -O2

On a Linux/x86/Debian/Sid with glibc version 2.3.2 and ld version
2.15, the command ./manydl 10 200 does work (using gcc -O to compile
its generated stuff)
but the command env CC=/usr/bin/tcc  CFLAGS=-O ./manydl 10 200
crashes on the first dlopen. The only difference is the compiler used
to compile the generated files.

Regards.
-- 
Basile STARYNKEVITCH         http://starynkevitch.net/Basile/ 
email: basile<at>starynkevitch<dot>net 
aliases: basile<at>tunes<dot>org = bstarynk<at>nerim<dot>net
8, rue de la Faïencerie, 92340 Bourg La Reine, France