diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/Makefile.am | 16 | ||||
| -rw-r--r-- | src/ctrl/Makefile.am | 4 | ||||
| -rw-r--r-- | src/gb/Makefile.am | 4 | ||||
| -rw-r--r-- | src/gsm/Makefile.am | 4 | ||||
| -rw-r--r-- | src/sim/Makefile.am | 4 | ||||
| -rw-r--r-- | src/talloc.c | 1804 | ||||
| -rw-r--r-- | src/vty/Makefile.am | 4 |
7 files changed, 15 insertions, 1825 deletions
diff --git a/src/Makefile.am b/src/Makefile.am index 00b97d08..32cefc8b 100644 --- a/src/Makefile.am +++ b/src/Makefile.am @@ -1,13 +1,13 @@ # This is _NOT_ the library release version, it's an API version. # Please read Chapter 6 "Library interface versions" of the libtool documentation before making any modification -LIBVERSION=6:0:0 +LIBVERSION=7:0:0 AM_CPPFLAGS = -I$(top_srcdir)/include -I$(top_builddir)/include -AM_CFLAGS = -Wall +AM_CFLAGS = -Wall $(TALLOC_CFLAGS) lib_LTLIBRARIES = libosmocore.la -libosmocore_la_LIBADD = $(BACKTRACE_LIB) +libosmocore_la_LIBADD = $(BACKTRACE_LIB) $(TALLOC_LIBS) libosmocore_la_SOURCES = timer.c select.c signal.c msgb.c bits.c \ bitvec.c statistics.c \ write_queue.c utils.c socket.c \ @@ -21,15 +21,9 @@ BUILT_SOURCES = crc8gen.c crc16gen.c crc32gen.c crc64gen.c if ENABLE_PLUGIN libosmocore_la_SOURCES += plugin.c -libosmocore_la_LDFLAGS = -version-info $(LIBVERSION) $(LIBRARY_DL) -no-undefined +libosmocore_la_LDFLAGS = -version-info $(LIBVERSION) $(TALLOC_LIBS) $(LIBRARY_DL) -no-undefined else -libosmocore_la_LDFLAGS = -version-info $(LIBVERSION) -no-undefined -endif - -if ENABLE_TALLOC -libosmocore_la_SOURCES += talloc.c -else -libosmocore_la_LIBADD += -ltalloc +libosmocore_la_LDFLAGS = -version-info $(LIBVERSION) $(TALLOC_LIBS) -no-undefined endif if ENABLE_MSGFILE diff --git a/src/ctrl/Makefile.am b/src/ctrl/Makefile.am index 71eced53..e6ccafb0 100644 --- a/src/ctrl/Makefile.am +++ b/src/ctrl/Makefile.am @@ -2,13 +2,13 @@ # Please read Chapter 6 "Library interface versions" of the libtool documentation before making any modification LIBVERSION=0:0:0 -AM_CFLAGS = -Wall $(all_includes) -I$(top_srcdir)/include -I$(top_builddir)/include +AM_CFLAGS = -Wall $(all_includes) -I$(top_srcdir)/include -I$(top_builddir)/include $(TALLOC_CFLAGS) lib_LTLIBRARIES = libosmoctrl.la libosmoctrl_la_SOURCES = control_cmd.c control_if.c -libosmoctrl_la_LDFLAGS = $(LTLDFLAGS_OSMOCTRL) -version-info $(LIBVERSION) -no-undefined +libosmoctrl_la_LDFLAGS = $(LTLDFLAGS_OSMOCTRL) $(TALLOC_LIBS) -version-info $(LIBVERSION) -no-undefined libosmoctrl_la_LIBADD = \ $(top_builddir)/src/libosmocore.la \ $(top_builddir)/src/gsm/libosmogsm.la \ diff --git a/src/gb/Makefile.am b/src/gb/Makefile.am index dd0d213c..68aed138 100644 --- a/src/gb/Makefile.am +++ b/src/gb/Makefile.am @@ -3,7 +3,7 @@ LIBVERSION=4:0:0 AM_CPPFLAGS = -I$(top_srcdir)/include -I$(top_builddir)/include -AM_CFLAGS = -Wall ${GCC_FVISIBILITY_HIDDEN} -fno-strict-aliasing +AM_CFLAGS = -Wall ${GCC_FVISIBILITY_HIDDEN} -fno-strict-aliasing $(TALLOC_CFLAGS) # FIXME: this should eventually go into a milenage/Makefile.am noinst_HEADERS = common_vty.h @@ -11,7 +11,7 @@ noinst_HEADERS = common_vty.h if ENABLE_GB lib_LTLIBRARIES = libosmogb.la -libosmogb_la_LDFLAGS = $(LTLDFLAGS_OSMOGB) -version-info $(LIBVERSION) +libosmogb_la_LDFLAGS = $(LTLDFLAGS_OSMOGB) -version-info $(LIBVERSION) $(TALLOC_LIBS) libosmogb_la_LIBADD = \ $(top_builddir)/src/libosmocore.la \ $(top_builddir)/src/vty/libosmovty.la \ diff --git a/src/gsm/Makefile.am b/src/gsm/Makefile.am index 1878050b..b0ea643e 100644 --- a/src/gsm/Makefile.am +++ b/src/gsm/Makefile.am @@ -2,7 +2,7 @@ # Please read Chapter 6 "Library interface versions" of the libtool documentation before making any modification LIBVERSION=6:0:1 -AM_CPPFLAGS = -I$(top_srcdir)/include -I$(top_builddir)/include +AM_CPPFLAGS = -I$(top_srcdir)/include -I$(top_builddir)/include $(TALLOC_CFLAGS) AM_CFLAGS = -Wall ${GCC_FVISIBILITY_HIDDEN} # FIXME: this should eventually go into a milenage/Makefile.am @@ -26,7 +26,7 @@ libgsmint_la_LDFLAGS = -no-undefined libgsmint_la_LIBADD = ../libosmocore.la libosmogsm_la_SOURCES = -libosmogsm_la_LDFLAGS = $(LTLDFLAGS_OSMOGSM) -version-info $(LIBVERSION) -no-undefined +libosmogsm_la_LDFLAGS = $(LTLDFLAGS_OSMOGSM) -version-info $(LIBVERSION) -no-undefined $(TALLOC_LIBS) libosmogsm_la_LIBADD = libgsmint.la EXTRA_DIST = libosmogsm.map diff --git a/src/sim/Makefile.am b/src/sim/Makefile.am index e241dc91..4358cc35 100644 --- a/src/sim/Makefile.am +++ b/src/sim/Makefile.am @@ -3,8 +3,8 @@ LIBVERSION=0:0:0 AM_CPPFLAGS = $(all_includes) -I$(top_srcdir)/include -I$(top_builddir)/include -AM_CFLAGS = -fPIC -Wall $(PCSC_CFLAGS) -AM_LDFLAGS = $(COVERAGE_LDFLAGS) +AM_CFLAGS = -fPIC -Wall $(PCSC_CFLAGS) $(TALLOC_CFLAGS) +AM_LDFLAGS = $(COVERAGE_LDFLAGS) $(TALLOC_LIBS) if ENABLE_PCSC # FIXME: only build the PC/SC dependent part conditional, but always build other parts diff --git a/src/talloc.c b/src/talloc.c deleted file mode 100644 index d3a0690f..00000000 --- a/src/talloc.c +++ /dev/null @@ -1,1804 +0,0 @@ -/* - Samba Unix SMB/CIFS implementation. - - Samba trivial allocation library - new interface - - NOTE: Please read talloc_guide.txt for full documentation - - Copyright (C) Andrew Tridgell 2004 - Copyright (C) Stefan Metzmacher 2006 - - ** NOTE! The following LGPL license applies to the talloc - ** library. This does NOT imply that all of Samba is released - ** under the LGPL - - This library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 3 of the License, or (at your option) any later version. - - This library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with this library; if not, see <http://www.gnu.org/licenses/>. -*/ - -/* - inspired by http://swapped.cc/halloc/ -*/ - -#ifdef _SAMBA_BUILD_ -#include "version.h" -#if (SAMBA_VERSION_MAJOR<4) -#include "includes.h" -/* This is to circumvent SAMBA3's paranoid malloc checker. Here in this file - * we trust ourselves... */ -#ifdef malloc -#undef malloc -#endif -#ifdef realloc -#undef realloc -#endif -#define _TALLOC_SAMBA3 -#endif /* (SAMBA_VERSION_MAJOR<4) */ -#endif /* _SAMBA_BUILD_ */ - -#ifndef _TALLOC_SAMBA3 -//#include "replace.h" -#include <unistd.h> -#include <stdio.h> -#include <stdbool.h> -#define __USE_GNU -#include <string.h> -#undef __USE_GNU -#include <osmocom/core/talloc.h> -#define MIN(x,y) ((x) < (y) ? (x) : (y)) -#endif /* not _TALLOC_SAMBA3 */ - -/* use this to force every realloc to change the pointer, to stress test - code that might not cope */ -#define ALWAYS_REALLOC 0 - - -#define MAX_TALLOC_SIZE 0x10000000 -#define TALLOC_MAGIC 0xe814ec70 -#define TALLOC_FLAG_FREE 0x01 -#define TALLOC_FLAG_LOOP 0x02 -#define TALLOC_FLAG_POOL 0x04 /* This is a talloc pool */ -#define TALLOC_FLAG_POOLMEM 0x08 /* This is allocated in a pool */ -#define TALLOC_MAGIC_REFERENCE ((const char *)1) - -/* by default we abort when given a bad pointer (such as when talloc_free() is called - on a pointer that came from malloc() */ -#ifndef TALLOC_ABORT -#define TALLOC_ABORT(reason) abort() -#endif - -#ifndef discard_const_p -#if defined(__intptr_t_defined) || defined(HAVE_INTPTR_T) -# define discard_const_p(type, ptr) ((type *)((intptr_t)(ptr))) -#else -# define discard_const_p(type, ptr) ((type *)(ptr)) -#endif -#endif - -/* these macros gain us a few percent of speed on gcc */ -#if (__GNUC__ >= 3) -/* the strange !! is to ensure that __builtin_expect() takes either 0 or 1 - as its first argument */ -#ifndef likely -#define likely(x) __builtin_expect(!!(x), 1) -#endif -#ifndef unlikely -#define unlikely(x) __builtin_expect(!!(x), 0) -#endif -#else -#ifndef likely -#define likely(x) (x) -#endif -#ifndef unlikely -#define unlikely(x) (x) -#endif -#endif - -#ifdef __APPLE__ -/* taken from http://insanecoding.blogspot.com/2007/03/methods-for-safe-string-handling.html */ -size_t strnlen(const char *s, size_t n) -{ - const char *p = (const char *)memchr(s, 0, n); - return(p ? p-s : n); -} -#endif - -/* this null_context is only used if talloc_enable_leak_report() or - talloc_enable_leak_report_full() is called, otherwise it remains - NULL -*/ -static void *null_context; -static void *autofree_context; - -struct talloc_reference_handle { - struct talloc_reference_handle *next, *prev; - void *ptr; -}; - -typedef int (*talloc_destructor_t)(void *); - -struct talloc_chunk { - struct talloc_chunk *next, *prev; - struct talloc_chunk *parent, *child; - struct talloc_reference_handle *refs; - talloc_destructor_t destructor; - const char *name; - size_t size; - unsigned flags; - - /* - * "pool" has dual use: - * - * For the talloc pool itself (i.e. TALLOC_FLAG_POOL is set), "pool" - * marks the end of the currently allocated area. - * - * For members of the pool (i.e. TALLOC_FLAG_POOLMEM is set), "pool" - * is a pointer to the struct talloc_chunk of the pool that it was - * allocated from. This way children can quickly find the pool to chew - * from. - */ - void *pool; -}; - -/* 16 byte alignment seems to keep everyone happy */ -#define TC_HDR_SIZE ((sizeof(struct talloc_chunk)+15)&~15) -#define TC_PTR_FROM_CHUNK(tc) ((void *)(TC_HDR_SIZE + (char*)tc)) - -static void (*talloc_abort_fn)(const char *reason); - -void talloc_set_abort_fn(void (*abort_fn)(const char *reason)) -{ - talloc_abort_fn = abort_fn; -} - -static void talloc_abort(const char *reason) -{ - if (!talloc_abort_fn) { - TALLOC_ABORT(reason); - } - - talloc_abort_fn(reason); -} - -static void talloc_abort_double_free(void) -{ - talloc_abort("Bad talloc magic value - double free"); -} - -static void talloc_abort_unknown_value(void) -{ - talloc_abort("Bad talloc magic value - unknown value"); -} - -/* panic if we get a bad magic value */ -static inline struct talloc_chunk *talloc_chunk_from_ptr(const void *ptr) -{ - const char *pp = (const char *)ptr; - struct talloc_chunk *tc = discard_const_p(struct talloc_chunk, pp - TC_HDR_SIZE); - if (unlikely((tc->flags & (TALLOC_FLAG_FREE | ~0xF)) != TALLOC_MAGIC)) { - if (tc->flags & TALLOC_FLAG_FREE) { - talloc_abort_double_free(); - } else { - talloc_abort_unknown_value(); - } - } - return tc; -} - -/* hook into the front of the list */ -#define _TLIST_ADD(list, p) \ -do { \ - if (!(list)) { \ - (list) = (p); \ - (p)->next = (p)->prev = NULL; \ - } else { \ - (list)->prev = (p); \ - (p)->next = (list); \ - (p)->prev = NULL; \ - (list) = (p); \ - }\ -} while (0) - -/* remove an element from a list - element doesn't have to be in list. */ -#define _TLIST_REMOVE(list, p) \ -do { \ - if ((p) == (list)) { \ - (list) = (p)->next; \ - if (list) (list)->prev = NULL; \ - } else { \ - if ((p)->prev) (p)->prev->next = (p)->next; \ - if ((p)->next) (p)->next->prev = (p)->prev; \ - } \ - if ((p) && ((p) != (list))) (p)->next = (p)->prev = NULL; \ -} while (0) - - -/* - return the parent chunk of a pointer -*/ -static inline struct talloc_chunk *talloc_parent_chunk(const void *ptr) -{ - struct talloc_chunk *tc; - - if (unlikely(ptr == NULL)) { - return NULL; - } - - tc = talloc_chunk_from_ptr(ptr); - while (tc->prev) tc=tc->prev; - - return tc->parent; -} - -void *talloc_parent(const void *ptr) -{ - struct talloc_chunk *tc = talloc_parent_chunk(ptr); - return tc? TC_PTR_FROM_CHUNK(tc) : NULL; -} - -/* - find parents name -*/ -const char *talloc_parent_name(const void *ptr) -{ - struct talloc_chunk *tc = talloc_parent_chunk(ptr); - return tc? tc->name : NULL; -} - -/* - A pool carries an in-pool object count count in the first 16 bytes. - bytes. This is done to support talloc_steal() to a parent outside of the - pool. The count includes the pool itself, so a talloc_free() on a pool will - only destroy the pool if the count has dropped to zero. A talloc_free() of a - pool member will reduce the count, and eventually also call free(3) on the - pool memory. - - The object count is not put into "struct talloc_chunk" because it is only - relevant for talloc pools and the alignment to 16 bytes would increase the - memory footprint of each talloc chunk by those 16 bytes. -*/ - -#define TALLOC_POOL_HDR_SIZE 16 - -static unsigned int *talloc_pool_objectcount(struct talloc_chunk *tc) -{ - return (unsigned int *)((char *)tc + sizeof(struct talloc_chunk)); -} - -/* - Allocate from a pool -*/ - -static struct talloc_chunk *talloc_alloc_pool(struct talloc_chunk *parent, - size_t size) -{ - struct talloc_chunk *pool_ctx = NULL; - size_t space_left; - struct talloc_chunk *result; - size_t chunk_size; - - if (parent == NULL) { - return NULL; - } - - if (parent->flags & TALLOC_FLAG_POOL) { - pool_ctx = parent; - } - else if (parent->flags & TALLOC_FLAG_POOLMEM) { - pool_ctx = (struct talloc_chunk *)parent->pool; - } - - if (pool_ctx == NULL) { - return NULL; - } - - space_left = ((char *)pool_ctx + TC_HDR_SIZE + pool_ctx->size) - - ((char *)pool_ctx->pool); - - /* - * Align size to 16 bytes - */ - chunk_size = ((size + 15) & ~15); - - if (space_left < chunk_size) { - return NULL; - } - - result = (struct talloc_chunk *)pool_ctx->pool; - -#if defined(DEVELOPER) && defined(VALGRIND_MAKE_MEM_UNDEFINED) - VALGRIND_MAKE_MEM_UNDEFINED(result, size); -#endif - - pool_ctx->pool = (void *)((char *)result + chunk_size); - - result->flags = TALLOC_MAGIC | TALLOC_FLAG_POOLMEM; - result->pool = pool_ctx; - - *talloc_pool_objectcount(pool_ctx) += 1; - - return result; -} - -/* - Allocate a bit of memory as a child of an existing pointer -*/ -static inline void *__talloc(const void *context, size_t size) -{ - struct talloc_chunk *tc = NULL; - - if (unlikely(context == NULL)) { - context = null_context; - } - - if (unlikely(size >= MAX_TALLOC_SIZE)) { - return NULL; - } - - if (context != NULL) { - tc = talloc_alloc_pool(talloc_chunk_from_ptr(context), - TC_HDR_SIZE+size); - } - - if (tc == NULL) { - tc = (struct talloc_chunk *)malloc(TC_HDR_SIZE+size); - if (unlikely(tc == NULL)) return NULL; - tc->flags = TALLOC_MAGIC; - tc->pool = NULL; - } - - tc->size = size; - tc->destructor = NULL; - tc->child = NULL; - tc->name = NULL; - tc->refs = NULL; - - if (likely(context)) { - struct talloc_chunk *parent = talloc_chunk_from_ptr(context); - - if (parent->child) { - parent->child->parent = NULL; - tc->next = parent->child; - tc->next->prev = tc; - } else { - tc->next = NULL; - } - tc->parent = parent; - tc->prev = NULL; - parent->child = tc; - } else { - tc->next = tc->prev = tc->parent = NULL; - } - - return TC_PTR_FROM_CHUNK(tc); -} - -/* - * Create a talloc pool - */ - -void *talloc_pool(const void *context, size_t size) -{ - void *result = __talloc(context, size + TALLOC_POOL_HDR_SIZE); - struct talloc_chunk *tc; - - if (unlikely(result == NULL)) { - return NULL; - } - - tc = talloc_chunk_from_ptr(result); - - tc->flags |= TALLOC_FLAG_POOL; - tc->pool = (char *)result + TALLOC_POOL_HDR_SIZE; - - *talloc_pool_objectcount(tc) = 1; - -#if defined(DEVELOPER) && defined(VALGRIND_MAKE_MEM_NOACCESS) - VALGRIND_MAKE_MEM_NOACCESS(tc->pool, size); -#endif - - return result; -} - -/* - setup a destructor to be called on free of a pointer - the destructor should return 0 on success, or -1 on failure. - if the destructor fails then the free is failed, and the memory can - be continued to be used -*/ -void _talloc_set_destructor(const void *ptr, int (*destructor)(void *)) -{ - struct talloc_chunk *tc = talloc_chunk_from_ptr(ptr); - tc->destructor = destructor; -} - -/* - increase the reference count on a piece of memory. -*/ -int talloc_increase_ref_count(const void *ptr) -{ - if (unlikely(!talloc_reference(null_context, ptr))) { - return -1; - } - return 0; -} - -/* - helper for talloc_reference() - - this is referenced by a function pointer and should not be inline -*/ -static int talloc_reference_destructor(struct talloc_reference_handle *handle) -{ - struct talloc_chunk *ptr_tc = talloc_chunk_from_ptr(handle->ptr); - _TLIST_REMOVE(ptr_tc->refs, handle); - return 0; -} - -/* - more efficient way to add a name to a pointer - the name must point to a - true string constant -*/ -static inline void _talloc_set_name_const(const void *ptr, const char *name) -{ - struct talloc_chunk *tc = talloc_chunk_from_ptr(ptr); - tc->name = name; -} - -/* - internal talloc_named_const() -*/ -static inline void *_talloc_named_const(const void *context, size_t size, const char *name) -{ - void *ptr; - - ptr = __talloc(context, size); - if (unlikely(ptr == NULL)) { - return NULL; - } - - _talloc_set_name_const(ptr, name); - - return ptr; -} - -/* - make a secondary reference to a pointer, hanging off the given context. - the pointer remains valid until both the original caller and this given - context are freed. - - the major use for this is when two different structures need to reference the - same underlying data, and you want to be able to free the two instances separately, - and in either order -*/ -void *_talloc_reference(const void *context, const void *ptr) -{ - struct talloc_chunk *tc; - struct talloc_reference_handle *handle; - if (unlikely(ptr == NULL)) return NULL; - - tc = talloc_chunk_from_ptr(ptr); - handle = (struct talloc_reference_handle *)_talloc_named_const(context, - sizeof(struct talloc_reference_handle), - TALLOC_MAGIC_REFERENCE); - if (unlikely(handle == NULL)) return NULL; - - /* note that we hang the destructor off the handle, not the - main context as that allows the caller to still setup their - own destructor on the context if they want to */ - talloc_set_destructor(handle, talloc_reference_destructor); - handle->ptr = discard_const_p(void, ptr); - _TLIST_ADD(tc->refs, handle); - return handle->ptr; -} - - -/* - internal talloc_free call -*/ -static inline int _talloc_free(void *ptr) -{ - struct talloc_chunk *tc; - - if (unlikely(ptr == NULL)) { - return -1; - } - - tc = talloc_chunk_from_ptr(ptr); - - if (unlikely(tc->refs)) { - int is_child; - /* check this is a reference from a child or grantchild - * back to it's parent or grantparent - * - * in that case we need to remove the reference and - * call another instance of talloc_free() on the current - * pointer. - */ - is_child = talloc_is_parent(tc->refs, ptr); - _talloc_free(tc->refs); - if (is_child) { - return _talloc_free(ptr); - } - return -1; - } - - if (unlikely(tc->flags & TALLOC_FLAG_LOOP)) { - /* we have a free loop - stop looping */ - return 0; - } - - if (unlikely(tc->destructor)) { - talloc_destructor_t d = tc->destructor; - if (d == (talloc_destructor_t)-1) { - return -1; - } - tc->destructor = (talloc_destructor_t)-1; - if (d(ptr) == -1) { - tc->destructor = d; - return -1; - } - tc->destructor = NULL; - } - - if (tc->parent) { - _TLIST_REMOVE(tc->parent->child, tc); - if (tc->parent->child) { - tc->parent->child->parent = tc->parent; - } - } else { - if (tc->prev) tc->prev->next = tc->next; - if (tc->next) tc->next->prev = tc->prev; - } - - tc->flags |= TALLOC_FLAG_LOOP; - - while (tc->child) { - /* we need to work out who will own an abandoned child - if it cannot be freed. In priority order, the first - choice is owner of any remaining reference to this - pointer, the second choice is our parent, and the - final choice is the null context. */ - void *child = TC_PTR_FROM_CHUNK(tc->child); - const void *new_parent = null_context; - if (unlikely(tc->child->refs)) { - struct talloc_chunk *p = talloc_parent_chunk(tc->child->refs); - if (p) new_parent = TC_PTR_FROM_CHUNK(p); - } - if (unlikely(_talloc_free(child) == -1)) { - if (new_parent == null_context) { - struct talloc_chunk *p = talloc_parent_chunk(ptr); - if (p) new_parent = TC_PTR_FROM_CHUNK(p); - } - talloc_steal(new_parent, child); - } - } - - tc->flags |= TALLOC_FLAG_FREE; - - if (tc->flags & (TALLOC_FLAG_POOL|TALLOC_FLAG_POOLMEM)) { - struct talloc_chunk *pool; - unsigned int *pool_object_count; - - pool = (tc->flags & TALLOC_FLAG_POOL) - ? tc : (struct talloc_chunk *)tc->pool; - - pool_object_count = talloc_pool_objectcount(pool); - - if (*pool_object_count == 0) { - talloc_abort("Pool object count zero!"); - } - - *pool_object_count -= 1; - - if (*pool_object_count == 0) { - free(pool); - } - } - else { - free(tc); - } - return 0; -} - -/* - move a lump of memory from one talloc context to another return the - ptr on success, or NULL if it could not be transferred. - passing NULL as ptr will always return NULL with no side effects. -*/ -void *_talloc_steal(const void *new_ctx, const void *ptr) -{ - struct talloc_chunk *tc, *new_tc; - - if (unlikely(!ptr)) { - return NULL; - } - - if (unlikely(new_ctx == NULL)) { - new_ctx = null_context; - } - - tc = talloc_chunk_from_ptr(ptr); - - if (unlikely(new_ctx == NULL)) { - if (tc->parent) { - _TLIST_REMOVE(tc->parent->child, tc); - if (tc->parent->child) { - tc->parent->child->parent = tc->parent; - } - } else { - if (tc->prev) tc->prev->next = tc->next; - if (tc->next) tc->next->prev = tc->prev; - } - - tc->parent = tc->next = tc->prev = NULL; - return discard_const_p(void, ptr); - } - - new_tc = talloc_chunk_from_ptr(new_ctx); - - if (unlikely(tc == new_tc || tc->parent == new_tc)) { - return discard_const_p(void, ptr); - } - - if (tc->parent) { - _TLIST_REMOVE(tc->parent->child, tc); - if (tc->parent->child) { - tc->parent->child->parent = tc->parent; - } - } else { - if (tc->prev) tc->prev->next = tc->next; - if (tc->next) tc->next->prev = tc->prev; - } - - tc->parent = new_tc; - if (new_tc->child) new_tc->child->parent = NULL; - _TLIST_ADD(new_tc->child, tc); - - return discard_const_p(void, ptr); -} - - - -/* - remove a secondary reference to a pointer. This undo's what - talloc_reference() has done. The context and pointer arguments - must match those given to a talloc_reference() -*/ -static inline int talloc_unreference(const void *context, const void *ptr) -{ - struct talloc_chunk *tc = talloc_chunk_from_ptr(ptr); - struct talloc_reference_handle *h; - - if (unlikely(context == NULL)) { - context = null_context; - } - - for (h=tc->refs;h;h=h->next) { - struct talloc_chunk *p = talloc_parent_chunk(h); - if (p == NULL) { - if (context == NULL) break; - } else if (TC_PTR_FROM_CHUNK(p) == context) { - break; - } - } - if (h == NULL) { - return -1; - } - - return _talloc_free(h); -} - -/* - remove a specific parent context from a pointer. This is a more - controlled varient of talloc_free() -*/ -int talloc_unlink(const void *context, void *ptr) -{ - struct talloc_chunk *tc_p, *new_p; - void *new_parent; - - if (ptr == NULL) { - return -1; - } - - if (context == NULL) { - context = null_context; - } - - if (talloc_unreference(context, ptr) == 0) { - return 0; - } - - if (context == NULL) { - if (talloc_parent_chunk(ptr) != NULL) { - return -1; - } - } else { - if (talloc_chunk_from_ptr(context) != talloc_parent_chunk(ptr)) { - return -1; - } - } - - tc_p = talloc_chunk_from_ptr(ptr); - - if (tc_p->refs == NULL) { - return _talloc_free(ptr); - } - - new_p = talloc_parent_chunk(tc_p->refs); - if (new_p) { - new_parent = TC_PTR_FROM_CHUNK(new_p); - } else { - new_parent = NULL; - } - - if (talloc_unreference(new_parent, ptr) != 0) { - return -1; - } - - talloc_steal(new_parent, ptr); - - return 0; -} - -/* - add a name to an existing pointer - va_list version -*/ -static inline const char *talloc_set_name_v(const void *ptr, const char *fmt, va_list ap) PRINTF_ATTRIBUTE(2,0); - -static inline const char *talloc_set_name_v(const void *ptr, const char *fmt, va_list ap) -{ - struct talloc_chunk *tc = talloc_chunk_from_ptr(ptr); - tc->name = talloc_vasprintf(ptr, fmt, ap); - if (likely(tc->name)) { - _talloc_set_name_const(tc->name, ".name"); - } - return tc->name; -} - -/* - add a name to an existing pointer -*/ -const char *talloc_set_name(const void *ptr, const char *fmt, ...) -{ - const char *name; - va_list ap; - va_start(ap, fmt); - name = talloc_set_name_v(ptr, fmt, ap); - va_end(ap); - return name; -} - - -/* - create a named talloc pointer. Any talloc pointer can be named, and - talloc_named() operates just like talloc() except that it allows you - to name the pointer. -*/ -void *talloc_named(const void *context, size_t size, const char *fmt, ...) -{ - va_list ap; - void *ptr; - const char *name; - - ptr = __talloc(context, size); - if (unlikely(ptr == NULL)) return NULL; - - va_start(ap, fmt); - name = talloc_set_name_v(ptr, fmt, ap); - va_end(ap); - - if (unlikely(name == NULL)) { - _talloc_free(ptr); - return NULL; - } - - return ptr; -} - -/* - return the name of a talloc ptr, or "UNNAMED" -*/ -const char *talloc_get_name(const void *ptr) -{ - struct talloc_chunk *tc = talloc_chunk_from_ptr(ptr); - if (unlikely(tc->name == TALLOC_MAGIC_REFERENCE)) { - return ".reference"; - } - if (likely(tc->name)) { - return tc->name; - } - return "UNNAMED"; -} - - -/* - check if a pointer has the given name. If it does, return the pointer, - otherwise return NULL -*/ -void *talloc_check_name(const void *ptr, const char *name) -{ - const char *pname; - if (unlikely(ptr == NULL)) return NULL; - pname = talloc_get_name(ptr); - if (likely(pname == name || strcmp(pname, name) == 0)) { - return discard_const_p(void, ptr); - } - return NULL; -} - -static void talloc_abort_type_missmatch(const char *location, - const char *name, - const char *expected) -{ - const char *reason; - - reason = talloc_asprintf(NULL, - "%s: Type mismatch: name[%s] expected[%s]", - location, - name?name:"NULL", - expected); - if (!reason) { - reason = "Type mismatch"; - } - - talloc_abort(reason); -} - -void *_talloc_get_type_abort(const void *ptr, const char *name, const char *location) -{ - const char *pname; - - if (unlikely(ptr == NULL)) { - talloc_abort_type_missmatch(location, NULL, name); - return NULL; - } - - pname = talloc_get_name(ptr); - if (likely(pname == name || strcmp(pname, name) == 0)) { - return discard_const_p(void, ptr); - } - - talloc_abort_type_missmatch(location, pname, name); - return NULL; -} - -/* - this is for compatibility with older versions of talloc -*/ -void *talloc_init(const char *fmt, ...) -{ - va_list ap; - void *ptr; - const char *name; - - /* - * samba3 expects talloc_report_depth_cb(NULL, ...) - * reports all talloc'ed memory, so we need to enable - * null_tracking - */ - talloc_enable_null_tracking(); - - ptr = __talloc(NULL, 0); - if (unlikely(ptr == NULL)) return NULL; - - va_start(ap, fmt); - name = talloc_set_name_v(ptr, fmt, ap); - va_end(ap); - - if (unlikely(name == NULL)) { - _talloc_free(ptr); - return NULL; - } - - return ptr; -} - -/* - this is a replacement for the Samba3 talloc_destroy_pool functionality. It - should probably not be used in new code. It's in here to keep the talloc - code consistent across Samba 3 and 4. -*/ -void talloc_free_children(void *ptr) -{ - struct talloc_chunk *tc; - - if (unlikely(ptr == NULL)) { - return; - } - - tc = talloc_chunk_from_ptr(ptr); - - while (tc->child) { - /* we need to work out who will own an abandoned child - if it cannot be freed. In priority order, the first - choice is owner of any remaining reference to this - pointer, the second choice is our parent, and the - final choice is the null context. */ - void *child = TC_PTR_FROM_CHUNK(tc->child); - const void *new_parent = null_context; - if (unlikely(tc->child->refs)) { - struct talloc_chunk *p = talloc_parent_chunk(tc->child->refs); - if (p) new_parent = TC_PTR_FROM_CHUNK(p); - } - if (unlikely(_talloc_free(child) == -1)) { - if (new_parent == null_context) { - struct talloc_chunk *p = talloc_parent_chunk(ptr); - if (p) new_parent = TC_PTR_FROM_CHUNK(p); - } - talloc_steal(new_parent, child); - } - } - - if ((tc->flags & TALLOC_FLAG_POOL) - && (*talloc_pool_objectcount(tc) == 1)) { - tc->pool = ((char *)tc + TC_HDR_SIZE + TALLOC_POOL_HDR_SIZE); -#if defined(DEVELOPER) && defined(VALGRIND_MAKE_MEM_NOACCESS) - VALGRIND_MAKE_MEM_NOACCESS( - tc->pool, tc->size - TALLOC_POOL_HDR_SIZE); -#endif - } -} - -/* - Allocate a bit of memory as a child of an existing pointer -*/ -void *_talloc(const void *context, size_t size) -{ - return __talloc(context, size); -} - -/* - externally callable talloc_set_name_const() -*/ -void talloc_set_name_const(const void *ptr, const char *name) -{ - _talloc_set_name_const(ptr, name); -} - -/* - create a named talloc pointer. Any talloc pointer can be named, and - talloc_named() operates just like talloc() except that it allows you - to name the pointer. -*/ -void *talloc_named_const(const void *context, size_t size, const char *name) -{ - return _talloc_named_const(context, size, name); -} - -/* - free a talloc pointer. This also frees all child pointers of this - pointer recursively - - return 0 if the memory is actually freed, otherwise -1. The memory - will not be freed if the ref_count is > 1 or the destructor (if - any) returns non-zero -*/ -int talloc_free(void *ptr) -{ - return _talloc_free(ptr); -} - - - -/* - A talloc version of realloc. The context argument is only used if - ptr is NULL -*/ -void *_talloc_realloc(const void *context, void *ptr, size_t size, const char *name) -{ - struct talloc_chunk *tc; - void *new_ptr; - bool malloced = false; - - /* size zero is equivalent to free() */ - if (unlikely(size == 0)) { - _talloc_free(ptr); - return NULL; - } - - if (unlikely(size >= MAX_TALLOC_SIZE)) { - return NULL; - } - - /* realloc(NULL) is equivalent to malloc() */ - if (ptr == NULL) { - return _talloc_named_const(context, size, name); - } - - tc = talloc_chunk_from_ptr(ptr); - - /* don't allow realloc on referenced pointers */ - if (unlikely(tc->refs)) { - return NULL; - } - - /* don't let anybody try to realloc a talloc_pool */ - if (unlikely(tc->flags & TALLOC_FLAG_POOL)) { - return NULL; - } - - /* don't shrink if we have less than 1k to gain */ - if ((size < tc->size) && ((tc->size - size) < 1024)) { - tc->size = size; - return ptr; - } - - /* by resetting magic we catch users of the old memory */ - tc->flags |= TALLOC_FLAG_FREE; - -#if ALWAYS_REALLOC - new_ptr = malloc(size + TC_HDR_SIZE); - if (new_ptr) { - memcpy(new_ptr, tc, tc->size + TC_HDR_SIZE); - free(tc); - } -#else - if (tc->flags & TALLOC_FLAG_POOLMEM) { - - new_ptr = talloc_alloc_pool(tc, size + TC_HDR_SIZE); - *talloc_pool_objectcount((struct talloc_chunk *) - (tc->pool)) -= 1; - - if (new_ptr == NULL) { - new_ptr = malloc(TC_HDR_SIZE+size); - malloced = true; - } - |