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nptl: PTHREAD_COND_INITIALIZER compatibility with pre-2.41 versions (bug 32786)

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The new initializer and struct layout does not initialize the
__g_signals field in the old struct layout before the change in
commit c36fc50781995e6758cae2b6927839d0157f213c ("nptl: Remove
g_refs from condition variables").  Bring back fields at the end
of struct __pthread_cond_s, so that they are again zero-initialized.

Reviewed-by: Sam James <sam@gentoo.org>
This commit is contained in:
Florian Weimer 2025-03-13 06:07:07 +01:00
parent a8e9022e0f
commit dbc5a50d12
2 changed files with 3 additions and 1 deletions

2
sysdeps/nptl/bits/thread-shared-types.h

@ -99,6 +99,8 @@ struct __pthread_cond_s
unsigned int __g1_orig_size;
unsigned int __wrefs;
unsigned int __g_signals[2];
unsigned int __unused_initialized_1;
unsigned int __unused_initialized_2;
};
typedef unsigned int __tss_t;

2
sysdeps/nptl/pthread.h

@ -152,7 +152,7 @@ enum
/* Conditional variable handling. */
#define PTHREAD_COND_INITIALIZER { { {0}, {0}, {0, 0}, 0, 0, {0, 0} } }
#define PTHREAD_COND_INITIALIZER { { {0}, {0}, {0, 0}, 0, 0, {0, 0}, 0, 0 } }
/* Cleanup buffers */