cannot allocate memory in static TLS block

cannot allocate memory in static TLS block

[Thorsten Kukuk]

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Hi,

compiling the appended test case on i686, gives me the following
error messages in some configurations:

# ./dlopen-tls 
dlopen() failed: './tls.so: cannot allocate memory in static TLS block'

It does not work with glibc compiled for i686 with TLS and
without NPTL (the fallback, if somebody uses an older kernel or
LD_ASSUME_KERNEL=2.4.1).

Is this a binutils/gcc problem or a bug in glibc? It seems to work
on other architectures with the same tool chain (gcc 3.3.1, 
binutils-2.14.90.0.5).

 Thanks,
  Thorsten

-- 
Thorsten Kukuk       http://www.suse.de/~kukuk/        kukuk@suse.de
SuSE Linux AG        Deutschherrnstr. 15-19        D-90429 Nuernberg
--------------------------------------------------------------------    
Key fingerprint = A368 676B 5E1B 3E46 CFCE  2D97 F8FD 4E23 56C6 FB4B

[-- Attachment #2: Makefile --]
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all:
	gcc -g dlopen-tls.c -o dlopen-tls -Wall -ldl
	gcc -g -c tls.c -o tls.o -fPIC -ftls-model=local-exec
	gcc -g -o tls.so -shared tls.o

clean:
	rm -rf *.o *~ *.so

[-- Attachment #3: dlopen-tls.c --]
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#include <stdio.h>
#include <dlfcn.h>
#include <unistd.h>
#include <stdlib.h>

int main()
{
    void *handle;
    int (*func)(void);

    int i;

    for (i = 0; i < 500; i++) {

        handle = dlopen("./tls.so", RTLD_NOW);

        if (!handle) {
            fprintf(stderr, "dlopen() failed: '%s'\n", dlerror());
            exit(1);
        }

        func = dlsym(handle, "getTLSVar");
        
        if (!func) {
            fprintf(stderr, "Failed to find symbol 'getTLSVar'\n");
            exit(1);
        }
        
        func();

        if (dlclose(handle) != 0) {
            fprintf(stderr, "dlopen() failed: '%s'\n", dlerror());
            exit(1);
        }
        
        printf("success %d\n", i);

    }
    
    return 0;
}

[-- Attachment #4: tls.c --]
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static __thread int foo;

int getTLSVar(void)
{
    return foo; 
} 
 

Re: cannot allocate memory in static TLS block

[Jakub Jelinek]

On Fri, Sep 05, 2003 at 08:02:24AM +0200, Thorsten Kukuk wrote:
> 
> Hi,
> 
> compiling the appended test case on i686, gives me the following
> error messages in some configurations:
> 
> # ./dlopen-tls 
> dlopen() failed: './tls.so: cannot allocate memory in static TLS block'
> 
> It does not work with glibc compiled for i686 with TLS and
> without NPTL (the fallback, if somebody uses an older kernel or
> LD_ASSUME_KERNEL=2.4.1).
> 
> Is this a binutils/gcc problem or a bug in glibc? It seems to work
> on other architectures with the same tool chain (gcc 3.3.1, 
> binutils-2.14.90.0.5).

It works for me with all 3 libc/libpthread combos we have on i686
(linuxthreads non-FLOATING_STACKS TLS, non-__thread,
linuxthreads FLOATING_STACKS TLS, non-__thread,
NPTL (obviously TLS __thread), aka LD_ASSUME_KERNEL={2.2.5,2.4.1,2.4.20}),
about a day old CVS checkout.

	Jakub