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From: "a.i.prutkov at gmail dot com" <sourceware-bugzilla@sourceware.org>
To: glibc-bugs@sourceware.org
Subject: [Bug malloc/15991] New: Error after calling proc by pointer: `malloc.c:3096: sYSMALLOc'...
Date: Tue, 01 Oct 2013 21:57:00 -0000
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X-Bugzilla-Version: 2.18
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https://sourceware.org/bugzilla/show_bug.cgi?id=15991

            Bug ID: 15991
           Summary: Error after calling proc by pointer: `malloc.c:3096:
                    sYSMALLOc'...
           Product: glibc
           Version: 2.18
            Status: NEW
          Severity: normal
          Priority: P2
         Component: malloc
          Assignee: unassigned at sourceware dot org
          Reporter: a.i.prutkov at gmail dot com

Dears sirs.

I have a problem when I am trying to run my programm written on C++ (platform
is Core i5-2.41 GNU/Linux x86_64).

The programm has many pointers on procedures (about 220), extracted by dlsym
from dynamical libraries (such as lissl, as libcrypto, as limcrypt). I need it
to protect the programm from Reverse Engineering (LD_PRELOAD etc).

The programm is multithread (Posix Threads), and it has callbacks with local
defined objects of different classes (NOT DYNAMICALLY for correct free memory
(by their destructors) used by objects in threads) similar:

[CODE=CPP]
void* my1_cb(void *arg){
 Crypt::Rsa rsa; // Rsa is big class for job with openssl rsa keys/CA
 Internet::SSLTcpClent client; // SSLTcpClent is big class for connect to SSL
hosts

 // etc ...
}
[/CODE]


In the runtime I get error:

[STDOUTPUT]
server: malloc.c:3096: sYSMALLOc: Assertion `(old_top == (((mbinptr) (((char *)
&((av)->bins[((1) - 1) * 2])) - __builtin_offsetof (struct malloc_chunk, fd))))
&& old_size == 0) || ((unsigned long) (old_size) >= (unsigned
long)((((__builtin_offsetof (struct malloc_chunk, fd_nextsize))+((2 *
(sizeof(size_t))) - 1)) & ~((2 * (sizeof(size_t))) - 1))) && ((old_top)->size &
0x1) && ((unsigned long)old_end & pagemask) == 0)' failed.
Abort termination
[/STDOUTPUT]

after calling procedure by pointer (from libz.so):

[CODE=CPP]
if (procs->deflateInit2_p(&stream,
Z_BEST_COMPRESSION,
Z_DEFLATED,
m,
8,
Z_DEFAULT_STRATEGY,
procs->zlibVersion_p(),
sizeof(z_stream)) != Z_OK) {
 goto err;
}
[/CODE]

I will be glad any help/tips.

--
Have a nice day.

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