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Fix memory leak in TLS of loaded objects.

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This commit is contained in:
Ulrich Drepper 2011-04-10 22:43:01 -04:00
parent c6489db3bd
commit e6c6149412
12 changed files with 56 additions and 14 deletions
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12
ChangeLog
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@ -1,3 +1,15 @@
2011-04-10 Ulrich Drepper <drepper@gmail.com>
[BZ #12650]
* sysdeps/i386/dl-tls.h: Define TLS_DTV_UNALLOCATED.
* sysdeps/ia64/dl-tls.h: Likewise.
* sysdeps/powerpc/dl-tls.h: Likewise.
* sysdeps/s390/dl-tls.h: Likewise.
* sysdeps/sh/dl-tls.h: Likewise.
* sysdeps/sparc/dl-tls.h: Likewise.
* sysdeps/x86_64/dl-tls.h: Likewise.
* elf/dl-tls.c: Don't define TLS_DTV_UNALLOCATED here.
2011-03-14 Andreas Schwab <schwab@redhat.com>
* elf/dl-load.c (_dl_dst_substitute): When skipping the first

2
NEWS
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@ -13,7 +13,7 @@ Version 2.14
* The following bugs are resolved with this release:
11724, 12445, 12454, 12460, 12469, 12489, 12509, 12510, 12518, 12583, 12587,
12597, 12631, 12655
12597, 12631, 12650, 12655
Version 2.13

5
elf/dl-tls.c
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@ -1,5 +1,5 @@
/* Thread-local storage handling in the ELF dynamic linker. Generic version.
Copyright (C) 2002,2003,2004,2005,2006,2008 Free Software Foundation, Inc.
Copyright (C) 2002-2006,2008,2011 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
@ -33,9 +33,6 @@
to allow dynamic loading of modules defining IE-model TLS data. */
#define TLS_STATIC_SURPLUS 64 + DL_NNS * 100
/* Value used for dtv entries for which the allocation is delayed. */
#define TLS_DTV_UNALLOCATED ((void *) -1l)
/* Out-of-memory handler. */
#ifdef SHARED

7
nptl/ChangeLog
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@ -1,3 +1,10 @@
2011-04-10 Ulrich Drepper <drepper@gmail.com>
[BZ #12650]
* allocatestack.c (get_cached_stack): Deallocate DTV entries before
clearing memory.
Patch partly by Robert Rex <robert.rex@exasol.com>.
2011-01-19 Roland McGrath <roland@redhat.com>
* pthread_cond_wait.c (__pthread_cond_wait): Fix comment typo.

7
nptl/allocatestack.c
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@ -1,4 +1,4 @@
/* Copyright (C) 2002-2007, 2009, 2010 Free Software Foundation, Inc.
/* Copyright (C) 2002-2007, 2009, 2010, 2011 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
@ -26,6 +26,7 @@
#include <sys/mman.h>
#include <sys/param.h>
#include <dl-sysdep.h>
#include <dl-tls.h>
#include <tls.h>
#include <lowlevellock.h>
#include <kernel-features.h>
@ -241,6 +242,10 @@ get_cached_stack (size_t *sizep, void **memp)
/* Clear the DTV. */
dtv_t *dtv = GET_DTV (TLS_TPADJ (result));
for (size_t cnt = 0; cnt < dtv[-1].counter; ++cnt)
if (! dtv[1 + cnt].pointer.is_static
&& dtv[1 + cnt].pointer.val != TLS_DTV_UNALLOCATED)
free (dtv[1 + cnt].pointer.val);
memset (dtv, '\0', (dtv[-1].counter + 1) * sizeof (dtv_t));
/* Re-initialize the TLS. */

5
sysdeps/i386/dl-tls.h
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@ -1,5 +1,5 @@
/* Thread-local storage handling in the ELF dynamic linker. i386 version.
Copyright (C) 2002, 2004 Free Software Foundation, Inc.
Copyright (C) 2002, 2004, 2011 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
@ -58,3 +58,6 @@ strong_alias (___tls_get_addr, ___tls_get_addr_internal)
# endif
#endif
/* Value used for dtv entries for which the allocation is delayed. */
#define TLS_DTV_UNALLOCATED ((void *) -1l)

5
sysdeps/ia64/dl-tls.h
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@ -1,5 +1,5 @@
/* Thread-local storage handling in the ELF dynamic linker. IA-64 version.
Copyright (C) 2002, 2003 Free Software Foundation, Inc.
Copyright (C) 2002, 2003, 2011 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
@ -28,3 +28,6 @@
#define DONT_USE_TLS_INDEX 1
extern void *__tls_get_addr (size_t m, size_t offset);
/* Value used for dtv entries for which the allocation is delayed. */
#define TLS_DTV_UNALLOCATED ((void *) -1l)

5
sysdeps/powerpc/dl-tls.h
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@ -1,5 +1,5 @@
/* Thread-local storage handling in the ELF dynamic linker. PowerPC version.
Copyright (C) 2003 Free Software Foundation, Inc.
Copyright (C) 2003, 2011 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
@ -47,3 +47,6 @@ extern void *__tls_get_addr (tls_index *ti);
# define GET_ADDR_OFFSET (ti->ti_offset + TLS_DTV_OFFSET)
# define __TLS_GET_ADDR(__ti) (__tls_get_addr (__ti) - TLS_DTV_OFFSET)
#endif
/* Value used for dtv entries for which the allocation is delayed. */
#define TLS_DTV_UNALLOCATED ((void *) -1l)

7
sysdeps/s390/dl-tls.h
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@ -1,5 +1,5 @@
/* Thread-local storage handling in the ELF dynamic linker. s390 version.
Copyright (C) 2003, 2004 Free Software Foundation, Inc.
Copyright (C) 2003, 2004, 2011 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
@ -72,6 +72,9 @@ __tls_get_offset:\n\
# define __TLS_GET_ADDR(__ti) \
({ extern char _GLOBAL_OFFSET_TABLE_[] attribute_hidden; \
(void *) __tls_get_offset ((char *) (__ti) - _GLOBAL_OFFSET_TABLE_) \
+ (unsigned long) __builtin_thread_pointer (); })
+ (unsigned long) __builtin_thread_pointer (); })
#endif
/* Value used for dtv entries for which the allocation is delayed. */
#define TLS_DTV_UNALLOCATED ((void *) -1l)

5
sysdeps/sh/dl-tls.h
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@ -1,5 +1,5 @@
/* Thread-local storage handling in the ELF dynamic linker. SH version.
Copyright (C) 2002 Free Software Foundation, Inc.
Copyright (C) 2002, 2011 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
@ -27,3 +27,6 @@ typedef struct
extern void *__tls_get_addr (tls_index *ti);
/* Value used for dtv entries for which the allocation is delayed. */
#define TLS_DTV_UNALLOCATED ((void *) -1l)

5
sysdeps/sparc/dl-tls.h
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@ -1,5 +1,5 @@
/* Thread-local storage handling in the ELF dynamic linker. SPARC version.
Copyright (C) 2003 Free Software Foundation, Inc.
Copyright (C) 2003, 2011 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
@ -27,3 +27,6 @@ typedef struct
extern void *__tls_get_addr (tls_index *ti);
/* Value used for dtv entries for which the allocation is delayed. */
#define TLS_DTV_UNALLOCATED ((void *) -1l)

5
sysdeps/x86_64/dl-tls.h
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@ -1,5 +1,5 @@
/* Thread-local storage handling in the ELF dynamic linker. x86-64 version.
Copyright (C) 2002, 2005 Free Software Foundation, Inc.
Copyright (C) 2002, 2005, 2011 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
@ -27,3 +27,6 @@ typedef struct dl_tls_index
extern void *__tls_get_addr (tls_index *ti);
/* Value used for dtv entries for which the allocation is delayed. */
#define TLS_DTV_UNALLOCATED ((void *) -1l)