2827ab990a
The __libc_freeres framework does not extend to non-libc.so objects. This causes problems in general for valgrind and mtrace detecting unfreed objects in both libdl.so and libpthread.so. This change is a pre-requisite to properly moving the malloc hooks out of malloc since such a move now requires precise accounting of all allocated data before destructors are run. This commit adds a proper hook in libc.so.6 for both libdl.so and for libpthread.so, this ensures that shm-directory.c which uses freeit () to free memory is called properly. We also remove the nptl_freeres hook and fall back to using weak-ref-and-check idiom for a loaded libpthread.so, thus making this process similar for all DSOs. Lastly we follow best practice and use explicit free calls for both libdl.so and libpthread.so instead of the generic hook process which has undefined order. Tested on x86_64 with no regressions. Signed-off-by: DJ Delorie <dj@redhat.com> Signed-off-by: Carlos O'Donell <carlos@redhat.com>
135 lines
3 KiB
C
135 lines
3 KiB
C
#include <stdio.h>
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#include <rpc/rpc.h>
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#include <assert.h>
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#include <libc-lock.h>
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#include <libc-tsd.h>
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#include <shlib-compat.h>
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#include <libc-symbols.h>
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/* Variable used in non-threaded applications or for the first thread. */
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static struct rpc_thread_variables __libc_tsd_RPC_VARS_mem;
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static __thread struct rpc_thread_variables *thread_rpc_vars
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attribute_tls_model_ie;
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/*
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* Task-variable destructor
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*/
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void
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__rpc_thread_destroy (void)
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{
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struct rpc_thread_variables *tvp = thread_rpc_vars;
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if (tvp != NULL) {
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__rpc_thread_svc_cleanup ();
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__rpc_thread_clnt_cleanup ();
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__rpc_thread_key_cleanup ();
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free (tvp->clnt_perr_buf_s);
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free (tvp->clntraw_private_s);
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free (tvp->svcraw_private_s);
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free (tvp->authdes_cache_s);
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free (tvp->authdes_lru_s);
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free (tvp->svc_xports_s);
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free (tvp->svc_pollfd_s);
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if (tvp != &__libc_tsd_RPC_VARS_mem)
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free (tvp);
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thread_rpc_vars = NULL;
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}
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}
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text_set_element (__libc_subfreeres, __rpc_thread_destroy);
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/*
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* Initialize RPC multi-threaded operation
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*/
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static void
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rpc_thread_multi (void)
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{
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thread_rpc_vars = &__libc_tsd_RPC_VARS_mem;
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}
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struct rpc_thread_variables *
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__rpc_thread_variables (void)
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{
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__libc_once_define (static, once);
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struct rpc_thread_variables *tvp = thread_rpc_vars;
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if (tvp == NULL) {
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__libc_once (once, rpc_thread_multi);
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tvp = thread_rpc_vars;
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if (tvp == NULL) {
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tvp = calloc (1, sizeof *tvp);
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if (tvp != NULL)
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thread_rpc_vars = tvp;
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}
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}
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return tvp;
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}
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/* Global variables If we're single-threaded, or if this is the first
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thread using the variable, use the existing global variable. This
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provides backwards compatibility for existing applications which
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dynamically link against this code. */
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#undef svc_fdset
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#undef rpc_createerr
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#undef svc_pollfd
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#undef svc_max_pollfd
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fd_set *
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__rpc_thread_svc_fdset (void)
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{
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struct rpc_thread_variables *tvp;
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tvp = __rpc_thread_variables ();
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if (tvp == &__libc_tsd_RPC_VARS_mem)
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return &svc_fdset;
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return &tvp->svc_fdset_s;
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}
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libc_hidden_nolink_sunrpc (__rpc_thread_svc_fdset, GLIBC_2_2_3)
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struct rpc_createerr *
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__rpc_thread_createerr (void)
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{
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struct rpc_thread_variables *tvp;
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tvp = __rpc_thread_variables ();
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if (tvp == &__libc_tsd_RPC_VARS_mem)
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return &rpc_createerr;
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return &tvp->rpc_createerr_s;
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}
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libc_hidden_nolink_sunrpc (__rpc_thread_createerr, GLIBC_2_2_3)
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struct pollfd **
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__rpc_thread_svc_pollfd (void)
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{
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struct rpc_thread_variables *tvp;
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tvp = __rpc_thread_variables ();
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if (tvp == &__libc_tsd_RPC_VARS_mem)
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return &svc_pollfd;
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return &tvp->svc_pollfd_s;
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}
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#ifdef EXPORT_RPC_SYMBOLS
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libc_hidden_def (__rpc_thread_svc_pollfd)
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#else
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libc_hidden_nolink_sunrpc (__rpc_thread_svc_pollfd, GLIBC_2_2_3)
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#endif
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int *
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__rpc_thread_svc_max_pollfd (void)
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{
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struct rpc_thread_variables *tvp;
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tvp = __rpc_thread_variables ();
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if (tvp == &__libc_tsd_RPC_VARS_mem)
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return &svc_max_pollfd;
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return &tvp->svc_max_pollfd_s;
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}
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#ifdef EXPORT_RPC_SYMBOLS
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libc_hidden_def (__rpc_thread_svc_max_pollfd)
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#else
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libc_hidden_nolink_sunrpc (__rpc_thread_svc_max_pollfd, GLIBC_2_2_3)
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#endif
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