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libdl: Use self-contained recursive mutex

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Update #2843.
This commit is contained in:
Sebastian Huber
2018-01-03 06:36:10 +01:00
parent 0a593c2d3f
commit d9800ac58d
3 changed files with 16 additions and 65 deletions
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9
cpukit/include/rtems/rtl/rtl.h
View File

@@ -20,8 +20,8 @@
#define _RTEMS_RTL_H_
#include <link.h>
#include <rtems.h>
#include <rtems/chain.h>
#include <rtems/thread.h>
#include <rtems/rtl/rtl-allocator.h>
#include <rtems/rtl/rtl-fwd.h>
@@ -96,7 +96,7 @@ typedef void (*rtems_rtl_cdtor_t)(void);
*/
struct rtems_rtl_data_s
{
rtems_id lock; /**< The RTL lock id */
rtems_recursive_mutex lock; /**< The RTL lock */
rtems_rtl_alloc_data_t allocator; /**< The allocator data. */
rtems_chain_control objects; /**< List if loaded object files. */
const char* paths; /**< Search paths for archives. */
@@ -183,11 +183,8 @@ rtems_rtl_data_t* rtems_rtl_lock (void);
/**
* Unlock the Run-time Linker.
*
* @return True The RTL is unlocked.
* @return False The RTL could not be unlocked. Not much you can do.
*/
bool rtems_rtl_unlock (void);
void rtems_rtl_unlock (void);
/**
* Check a pointer is a valid object file descriptor returning the pointer as

70
cpukit/libdl/rtl.c
View File

@@ -31,13 +31,6 @@
#include "rtl-string.h"
#include <rtems/rtl/rtl-trace.h>
/**
* Semaphore configuration to create a mutex.
*/
#define RTEMS_MUTEX_ATTRIBS \
(RTEMS_PRIORITY | RTEMS_BINARY_SEMAPHORE | \
RTEMS_INHERIT_PRIORITY | RTEMS_NO_PRIORITY_CEILING | RTEMS_LOCAL)
/**
* Symbol table cache size. They can be big so the cache needs space to work.
*/
@@ -92,9 +85,6 @@ rtems_rtl_data_init (void)
if (!rtl)
{
rtems_status_code sc;
rtems_id lock;
/*
* We cannot set an error in this code because there is no RTL data to
* hold it.
@@ -129,26 +119,8 @@ rtems_rtl_data_init (void)
/*
* Create the RTL lock.
*/
sc = rtems_semaphore_create (rtems_build_name ('R', 'T', 'L', 'D'),
1, RTEMS_MUTEX_ATTRIBS,
RTEMS_NO_PRIORITY, &lock);
if (sc != RTEMS_SUCCESSFUL)
{
free (rtl);
rtems_libio_unlock ();
return false;
}
sc = rtems_semaphore_obtain (lock, RTEMS_WAIT, RTEMS_NO_TIMEOUT);
if (sc != RTEMS_SUCCESSFUL)
{
rtems_semaphore_delete (lock);
free (rtl);
rtems_libio_unlock ();
return false;
}
rtl->lock = lock;
rtems_recursive_mutex_init (&rtl->lock, "Run-Time Linker");
rtems_recursive_mutex_lock (&rtl->lock);
/*
* Initialise the objects list and create any required services.
@@ -158,7 +130,7 @@ rtems_rtl_data_init (void)
if (!rtems_rtl_symbol_table_open (&rtl->globals,
RTEMS_RTL_SYMS_GLOBAL_BUCKETS))
{
rtems_semaphore_delete (lock);
rtems_recursive_mutex_destroy (&rtl->lock);
free (rtl);
rtems_libio_unlock ();
return false;
@@ -168,7 +140,7 @@ rtems_rtl_data_init (void)
RTEMS_RTL_UNRESOLVED_BLOCK_SIZE))
{
rtems_rtl_symbol_table_close (&rtl->globals);
rtems_semaphore_delete (lock);
rtems_recursive_mutex_destroy (&rtl->lock);
free (rtl);
rtems_libio_unlock ();
return false;
@@ -179,7 +151,7 @@ rtems_rtl_data_init (void)
{
rtems_rtl_symbol_table_close (&rtl->globals);
rtems_rtl_unresolved_table_close (&rtl->unresolved);
rtems_semaphore_delete (lock);
rtems_recursive_mutex_destroy (&rtl->lock);
free (rtl);
rtems_libio_unlock ();
return false;
@@ -191,7 +163,7 @@ rtems_rtl_data_init (void)
rtems_rtl_obj_cache_close (&rtl->symbols);
rtems_rtl_unresolved_table_close (&rtl->unresolved);
rtems_rtl_symbol_table_close (&rtl->globals);
rtems_semaphore_delete (lock);
rtems_recursive_mutex_destroy (&rtl->lock);
free (rtl);
rtems_libio_unlock ();
return false;
@@ -204,7 +176,7 @@ rtems_rtl_data_init (void)
rtems_rtl_obj_cache_close (&rtl->symbols);
rtems_rtl_unresolved_table_close (&rtl->unresolved);
rtems_rtl_symbol_table_close (&rtl->globals);
rtems_semaphore_delete (lock);
rtems_recursive_mutex_destroy (&rtl->lock);
free (rtl);
rtems_libio_unlock ();
return false;
@@ -218,7 +190,7 @@ rtems_rtl_data_init (void)
rtems_rtl_obj_cache_close (&rtl->symbols);
rtems_rtl_unresolved_table_close (&rtl->unresolved);
rtems_rtl_symbol_table_close (&rtl->globals);
rtems_semaphore_delete (lock);
rtems_recursive_mutex_destroy (&rtl->lock);
free (rtl);
rtems_libio_unlock ();
return false;
@@ -233,7 +205,7 @@ rtems_rtl_data_init (void)
rtems_rtl_obj_cache_close (&rtl->symbols);
rtems_rtl_unresolved_table_close (&rtl->unresolved);
rtems_rtl_symbol_table_close (&rtl->globals);
rtems_semaphore_delete (lock);
rtems_recursive_mutex_destroy (&rtl->lock);
free (rtl);
rtems_libio_unlock ();
return false;
@@ -343,36 +315,18 @@ rtems_rtl_obj_comp (rtems_rtl_obj_comp_t** decomp,
rtems_rtl_data_t*
rtems_rtl_lock (void)
{
rtems_status_code sc;
if (!rtems_rtl_data_init ())
return NULL;
sc = rtems_semaphore_obtain (rtl->lock,
RTEMS_WAIT, RTEMS_NO_TIMEOUT);
if (sc != RTEMS_SUCCESSFUL)
{
errno = EINVAL;
return NULL;
}
rtems_recursive_mutex_lock (&rtl->lock);
return rtl;
}
bool
void
rtems_rtl_unlock (void)
{
/*
* Not sure any error should be returned or an assert.
*/
rtems_status_code sc;
sc = rtems_semaphore_release (rtl->lock);
if ((sc != RTEMS_SUCCESSFUL) && (errno == 0))
{
errno = EINVAL;
return false;
}
return true;
rtems_recursive_mutex_unlock (&rtl->lock);
}
rtems_rtl_obj_t*

2
testsuites/libtests/dl03/dl-cache.c
View File

@@ -75,7 +75,7 @@ static void dl_init_rtl(void)
*/
rtems_test_assert(rtems_rtl_data () == NULL);
rtems_test_assert(rtems_rtl_lock () != NULL);
rtems_test_assert(rtems_rtl_unlock () == true);
rtems_rtl_unlock ();
rtems_test_assert(rtems_rtl_data () != NULL);
rtems_rtl_trace_set_mask(RTEMS_RTL_TRACE_ALL | RTEMS_RTL_TRACE_CACHE);
}