+++ /dev/null
-Using talloc in Samba4
-----------------------
-
-Andrew Tridgell
-September 2004
-
-The most current version of this document is available at
- http://samba.org/ftp/unpacked/samba4/source/lib/talloc/talloc_guide.txt
-
-If you are used to the "old" talloc from Samba3 before 3.0.20 then please read
-this carefully, as talloc has changed a lot. With 3.0.20 (or 3.0.14?) the
-Samba4 talloc has been ported back to Samba3, so this guide applies to both.
-
-The new talloc is a hierarchical, reference counted memory pool system
-with destructors. Quite a mouthful really, but not too bad once you
-get used to it.
-
-Perhaps the biggest change from Samba3 is that there is no distinction
-between a "talloc context" and a "talloc pointer". Any pointer
-returned from talloc() is itself a valid talloc context. This means
-you can do this:
-
- struct foo *X = talloc(mem_ctx, struct foo);
- X->name = talloc_strdup(X, "foo");
-
-and the pointer X->name would be a "child" of the talloc context "X"
-which is itself a child of mem_ctx. So if you do talloc_free(mem_ctx)
-then it is all destroyed, whereas if you do talloc_free(X) then just X
-and X->name are destroyed, and if you do talloc_free(X->name) then
-just the name element of X is destroyed.
-
-If you think about this, then what this effectively gives you is an
-n-ary tree, where you can free any part of the tree with
-talloc_free().
-
-If you find this confusing, then I suggest you run the testsuite to
-watch talloc in action. You may also like to add your own tests to
-testsuite.c to clarify how some particular situation is handled.
-
-
-Performance
------------
-
-All the additional features of talloc() over malloc() do come at a
-price. We have a simple performance test in Samba4 that measures
-talloc() versus malloc() performance, and it seems that talloc() is
-about 4% slower than malloc() on my x86 Debian Linux box. For Samba,
-the great reduction in code complexity that we get by using talloc
-makes this worthwhile, especially as the total overhead of
-talloc/malloc in Samba is already quite small.
-
-
-talloc API
-----------
-
-The following is a complete guide to the talloc API. Read it all at
-least twice.
-
-Multi-threading
----------------
-
-talloc itself does not deal with threads. It is thread-safe (assuming
-the underlying "malloc" is), as long as each thread uses different
-memory contexts.
-If two threads uses the same context then they need to synchronize in
-order to be safe. In particular:
-- when using talloc_enable_leak_report(), giving directly NULL as a
-parent context implicitly refers to a hidden "null context" global
-variable, so this should not be used in a multi-threaded environment
-without proper synchronization ;
-- the context returned by talloc_autofree_context() is also global so
-shouldn't be used by several threads simultaneously without
-synchronization.
-
-
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
-(type *)talloc(const void *context, type);
-
-The talloc() macro is the core of the talloc library. It takes a
-memory context and a type, and returns a pointer to a new area of
-memory of the given type.
-
-The returned pointer is itself a talloc context, so you can use it as
-the context argument to more calls to talloc if you wish.
-
-The returned pointer is a "child" of the supplied context. This means
-that if you talloc_free() the context then the new child disappears as
-well. Alternatively you can free just the child.
-
-The context argument to talloc() can be NULL, in which case a new top
-level context is created.
-
-
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
-void *talloc_size(const void *context, size_t size);
-
-The function talloc_size() should be used when you don't have a
-convenient type to pass to talloc(). Unlike talloc(), it is not type
-safe (as it returns a void *), so you are on your own for type checking.
-
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
-(typeof(ptr)) talloc_ptrtype(const void *ctx, ptr);
-
-The talloc_ptrtype() macro should be used when you have a pointer and
-want to allocate memory to point at with this pointer. When compiling
-with gcc >= 3 it is typesafe. Note this is a wrapper of talloc_size()
-and talloc_get_name() will return the current location in the source file.
-and not the type.
-
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
-int talloc_free(void *ptr);
-
-The talloc_free() function frees a piece of talloc memory, and all its
-children. You can call talloc_free() on any pointer returned by
-talloc().
-
-The return value of talloc_free() indicates success or failure, with 0
-returned for success and -1 for failure. The only possible failure
-condition is if the pointer had a destructor attached to it and the
-destructor returned -1. See talloc_set_destructor() for details on
-destructors.
-
-If this pointer has an additional parent when talloc_free() is called
-then the memory is not actually released, but instead the most
-recently established parent is destroyed. See talloc_reference() for
-details on establishing additional parents.
-
-For more control on which parent is removed, see talloc_unlink()
-
-talloc_free() operates recursively on its children.
-
-
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
-int talloc_free_children(void *ptr);
-
-The talloc_free_children() walks along the list of all children of a
-talloc context and talloc_free()s only the children, not the context
-itself.
-
-
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
-void *talloc_reference(const void *context, const void *ptr);
-
-The talloc_reference() function makes "context" an additional parent
-of "ptr".
-
-The return value of talloc_reference() is always the original pointer
-"ptr", unless talloc ran out of memory in creating the reference in
-which case it will return NULL (each additional reference consumes
-around 48 bytes of memory on intel x86 platforms).
-
-If "ptr" is NULL, then the function is a no-op, and simply returns NULL.
-
-After creating a reference you can free it in one of the following
-ways:
-
- - you can talloc_free() any parent of the original pointer. That
- will reduce the number of parents of this pointer by 1, and will
- cause this pointer to be freed if it runs out of parents.
-
- - you can talloc_free() the pointer itself. That will destroy the
- most recently established parent to the pointer and leave the
- pointer as a child of its current parent.
-
-For more control on which parent to remove, see talloc_unlink()
-
-
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
-int talloc_unlink(const void *context, const void *ptr);
-
-The talloc_unlink() function removes a specific parent from ptr. The
-context passed must either be a context used in talloc_reference()
-with this pointer, or must be a direct parent of ptr.
-
-Note that if the parent has already been removed using talloc_free()
-then this function will fail and will return -1. Likewise, if "ptr"
-is NULL, then the function will make no modifications and return -1.
-
-Usually you can just use talloc_free() instead of talloc_unlink(), but
-sometimes it is useful to have the additional control on which parent
-is removed.
-
-
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
-void talloc_set_destructor(const void *ptr, int (*destructor)(void *));
-
-The function talloc_set_destructor() sets the "destructor" for the
-pointer "ptr". A destructor is a function that is called when the
-memory used by a pointer is about to be released. The destructor
-receives the pointer as an argument, and should return 0 for success
-and -1 for failure.
-
-The destructor can do anything it wants to, including freeing other
-pieces of memory. A common use for destructors is to clean up
-operating system resources (such as open file descriptors) contained
-in the structure the destructor is placed on.
-
-You can only place one destructor on a pointer. If you need more than
-one destructor then you can create a zero-length child of the pointer
-and place an additional destructor on that.
-
-To remove a destructor call talloc_set_destructor() with NULL for the
-destructor.
-
-If your destructor attempts to talloc_free() the pointer that it is
-the destructor for then talloc_free() will return -1 and the free will
-be ignored. This would be a pointless operation anyway, as the
-destructor is only called when the memory is just about to go away.
-
-
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
-int talloc_increase_ref_count(const void *ptr);
-
-The talloc_increase_ref_count(ptr) function is exactly equivalent to:
-
- talloc_reference(NULL, ptr);
-
-You can use either syntax, depending on which you think is clearer in
-your code.
-
-It returns 0 on success and -1 on failure.
-
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
-size_t talloc_reference_count(const void *ptr);
-
-Return the number of references to the pointer.
-
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
-void talloc_set_name(const void *ptr, const char *fmt, ...);
-
-Each talloc pointer has a "name". The name is used principally for
-debugging purposes, although it is also possible to set and get the
-name on a pointer in as a way of "marking" pointers in your code.
-
-The main use for names on pointer is for "talloc reports". See
-talloc_report() and talloc_report_full() for details. Also see
-talloc_enable_leak_report() and talloc_enable_leak_report_full().
-
-The talloc_set_name() function allocates memory as a child of the
-pointer. It is logically equivalent to:
- talloc_set_name_const(ptr, talloc_asprintf(ptr, fmt, ...));
-
-Note that multiple calls to talloc_set_name() will allocate more
-memory without releasing the name. All of the memory is released when
-the ptr is freed using talloc_free().
-
-
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
-void talloc_set_name_const(const void *ptr, const char *name);
-
-The function talloc_set_name_const() is just like talloc_set_name(),
-but it takes a string constant, and is much faster. It is extensively
-used by the "auto naming" macros, such as talloc_p().
-
-This function does not allocate any memory. It just copies the
-supplied pointer into the internal representation of the talloc
-ptr. This means you must not pass a name pointer to memory that will
-disappear before the ptr is freed with talloc_free().
-
-
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
-void *talloc_named(const void *context, size_t size, const char *fmt, ...);
-
-The talloc_named() function creates a named talloc pointer. It is
-equivalent to:
-
- ptr = talloc_size(context, size);
- talloc_set_name(ptr, fmt, ....);
-
-
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
-void *talloc_named_const(const void *context, size_t size, const char *name);
-
-This is equivalent to:
-
- ptr = talloc_size(context, size);
- talloc_set_name_const(ptr, name);
-
-
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
-const char *talloc_get_name(const void *ptr);
-
-This returns the current name for the given talloc pointer. See
-talloc_set_name() for details.
-
-
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
-void *talloc_init(const char *fmt, ...);
-
-This function creates a zero length named talloc context as a top
-level context. It is equivalent to:
-
- talloc_named(NULL, 0, fmt, ...);
-
-
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
-void *talloc_new(void *ctx);
-
-This is a utility macro that creates a new memory context hanging
-off an exiting context, automatically naming it "talloc_new: __location__"
-where __location__ is the source line it is called from. It is
-particularly useful for creating a new temporary working context.
-
-
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
-(type *)talloc_realloc(const void *context, void *ptr, type, count);
-
-The talloc_realloc() macro changes the size of a talloc
-pointer. The "count" argument is the number of elements of type "type"
-that you want the resulting pointer to hold.
-
-talloc_realloc() has the following equivalences:
-
- talloc_realloc(context, NULL, type, 1) ==> talloc(context, type);
- talloc_realloc(context, NULL, type, N) ==> talloc_array(context, type, N);
- talloc_realloc(context, ptr, type, 0) ==> talloc_free(ptr);
-
-The "context" argument is only used if "ptr" is NULL, otherwise it is
-ignored.
-
-talloc_realloc() returns the new pointer, or NULL on failure. The call
-will fail either due to a lack of memory, or because the pointer has
-more than one parent (see talloc_reference()).
-
-
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
-void *talloc_realloc_size(const void *context, void *ptr, size_t size);
-
-the talloc_realloc_size() function is useful when the type is not
-known so the typesafe talloc_realloc() cannot be used.
-
-
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
-void *talloc_steal(const void *new_ctx, const void *ptr);
-
-The talloc_steal() function changes the parent context of a talloc
-pointer. It is typically used when the context that the pointer is
-currently a child of is going to be freed and you wish to keep the
-memory for a longer time.
-
-The talloc_steal() function returns the pointer that you pass it. It
-does not have any failure modes.
-
-NOTE: It is possible to produce loops in the parent/child relationship
-if you are not careful with talloc_steal(). No guarantees are provided
-as to your sanity or the safety of your data if you do this.
-
-talloc_steal (new_ctx, NULL) will return NULL with no sideeffects.
-
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
-size_t talloc_total_size(const void *ptr);
-
-The talloc_total_size() function returns the total size in bytes used
-by this pointer and all child pointers. Mostly useful for debugging.
-
-Passing NULL is allowed, but it will only give a meaningful result if
-talloc_enable_leak_report() or talloc_enable_leak_report_full() has
-been called.
-
-
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
-size_t talloc_total_blocks(const void *ptr);
-
-The talloc_total_blocks() function returns the total memory block
-count used by this pointer and all child pointers. Mostly useful for
-debugging.
-
-Passing NULL is allowed, but it will only give a meaningful result if
-talloc_enable_leak_report() or talloc_enable_leak_report_full() has
-been called.
-
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
-void talloc_report_depth_cb(const void *ptr, int depth, int max_depth,
- void (*callback)(const void *ptr,
- int depth, int max_depth,
- int is_ref,
- void *priv),
- void *priv);
-
-This provides a more flexible reports than talloc_report(). It
-will recursively call the callback for the entire tree of memory
-referenced by the pointer. References in the tree are passed with
-is_ref = 1 and the pointer that is referenced.
-
-You can pass NULL for the pointer, in which case a report is
-printed for the top level memory context, but only if
-talloc_enable_leak_report() or talloc_enable_leak_report_full()
-has been called.
-
-The recursion is stopped when depth >= max_depth.
-max_depth = -1 means only stop at leaf nodes.
-
-
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
-void talloc_report_depth_file(const void *ptr, int depth, int max_depth, FILE *f);
-
-This provides a more flexible reports than talloc_report(). It
-will let you specify the depth and max_depth.
-
-
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
-void talloc_report(const void *ptr, FILE *f);
-
-The talloc_report() function prints a summary report of all memory
-used by ptr. One line of report is printed for each immediate child of
-ptr, showing the total memory and number of blocks used by that child.
-
-You can pass NULL for the pointer, in which case a report is printed
-for the top level memory context, but only if
-talloc_enable_leak_report() or talloc_enable_leak_report_full() has
-been called.
-
-
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
-void talloc_report_full(const void *ptr, FILE *f);
-
-This provides a more detailed report than talloc_report(). It will
-recursively print the ensire tree of memory referenced by the
-pointer. References in the tree are shown by giving the name of the
-pointer that is referenced.
-
-You can pass NULL for the pointer, in which case a report is printed
-for the top level memory context, but only if
-talloc_enable_leak_report() or talloc_enable_leak_report_full() has
-been called.
-
-
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
-void talloc_enable_leak_report(void);
-
-This enables calling of talloc_report(NULL, stderr) when the program
-exits. In Samba4 this is enabled by using the --leak-report command
-line option.
-
-For it to be useful, this function must be called before any other
-talloc function as it establishes a "null context" that acts as the
-top of the tree. If you don't call this function first then passing
-NULL to talloc_report() or talloc_report_full() won't give you the
-full tree printout.
-
-Here is a typical talloc report:
-
-talloc report on 'null_context' (total 267 bytes in 15 blocks)
- libcli/auth/spnego_parse.c:55 contains 31 bytes in 2 blocks
- libcli/auth/spnego_parse.c:55 contains 31 bytes in 2 blocks
- iconv(UTF8,CP850) contains 42 bytes in 2 blocks
- libcli/auth/spnego_parse.c:55 contains 31 bytes in 2 blocks
- iconv(CP850,UTF8) contains 42 bytes in 2 blocks
- iconv(UTF8,UTF-16LE) contains 45 bytes in 2 blocks
- iconv(UTF-16LE,UTF8) contains 45 bytes in 2 blocks
-
-
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
-void talloc_enable_leak_report_full(void);
-
-This enables calling of talloc_report_full(NULL, stderr) when the
-program exits. In Samba4 this is enabled by using the
---leak-report-full command line option.
-
-For it to be useful, this function must be called before any other
-talloc function as it establishes a "null context" that acts as the
-top of the tree. If you don't call this function first then passing
-NULL to talloc_report() or talloc_report_full() won't give you the
-full tree printout.
-
-Here is a typical full report:
-
-full talloc report on 'root' (total 18 bytes in 8 blocks)
- p1 contains 18 bytes in 7 blocks (ref 0)
- r1 contains 13 bytes in 2 blocks (ref 0)
- reference to: p2
- p2 contains 1 bytes in 1 blocks (ref 1)
- x3 contains 1 bytes in 1 blocks (ref 0)
- x2 contains 1 bytes in 1 blocks (ref 0)
- x1 contains 1 bytes in 1 blocks (ref 0)
-
-
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
-void talloc_enable_null_tracking(void);
-
-This enables tracking of the NULL memory context without enabling leak
-reporting on exit. Useful for when you want to do your own leak
-reporting call via talloc_report_null_full();
-
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
-void talloc_disable_null_tracking(void);
-
-This disables tracking of the NULL memory context.
-
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
-(type *)talloc_zero(const void *ctx, type);
-
-The talloc_zero() macro is equivalent to:
-
- ptr = talloc(ctx, type);
- if (ptr) memset(ptr, 0, sizeof(type));
-
-
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
-void *talloc_zero_size(const void *ctx, size_t size)
-
-The talloc_zero_size() function is useful when you don't have a known type
-
-
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
-void *talloc_memdup(const void *ctx, const void *p, size_t size);
-
-The talloc_memdup() function is equivalent to:
-
- ptr = talloc_size(ctx, size);
- if (ptr) memcpy(ptr, p, size);
-
-
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
-char *talloc_strdup(const void *ctx, const char *p);
-
-The talloc_strdup() function is equivalent to:
-
- ptr = talloc_size(ctx, strlen(p)+1);
- if (ptr) memcpy(ptr, p, strlen(p)+1);
-
-This functions sets the name of the new pointer to the passed
-string. This is equivalent to:
- talloc_set_name_const(ptr, ptr)
-
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
-char *talloc_strndup(const void *t, const char *p, size_t n);
-
-The talloc_strndup() function is the talloc equivalent of the C
-library function strndup()
-
-This functions sets the name of the new pointer to the passed
-string. This is equivalent to:
- talloc_set_name_const(ptr, ptr)
-
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
-char *talloc_append_string(const void *t, char *orig, const char *append);
-
-The talloc_append_string() function appends the given formatted
-string to the given string.
-
-This function sets the name of the new pointer to the new
-string. This is equivalent to:
- talloc_set_name_const(ptr, ptr)
-
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
-char *talloc_vasprintf(const void *t, const char *fmt, va_list ap);
-
-The talloc_vasprintf() function is the talloc equivalent of the C
-library function vasprintf()
-
-This functions sets the name of the new pointer to the new
-string. This is equivalent to:
- talloc_set_name_const(ptr, ptr)
-
-
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
-char *talloc_asprintf(const void *t, const char *fmt, ...);
-
-The talloc_asprintf() function is the talloc equivalent of the C
-library function asprintf()
-
-This functions sets the name of the new pointer to the new
-string. This is equivalent to:
- talloc_set_name_const(ptr, ptr)
-
-
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
-char *talloc_asprintf_append(char *s, const char *fmt, ...);
-
-The talloc_asprintf_append() function appends the given formatted
-string to the given string.
-
-This functions sets the name of the new pointer to the new
-string. This is equivalent to:
- talloc_set_name_const(ptr, ptr)
-
-
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
-(type *)talloc_array(const void *ctx, type, uint_t count);
-
-The talloc_array() macro is equivalent to:
-
- (type *)talloc_size(ctx, sizeof(type) * count);
-
-except that it provides integer overflow protection for the multiply,
-returning NULL if the multiply overflows.
-
-
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
-void *talloc_array_size(const void *ctx, size_t size, uint_t count);
-
-The talloc_array_size() function is useful when the type is not
-known. It operates in the same way as talloc_array(), but takes a size
-instead of a type.
-
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
-(typeof(ptr)) talloc_array_ptrtype(const void *ctx, ptr, uint_t count);
-
-The talloc_ptrtype() macro should be used when you have a pointer to an array
-and want to allocate memory of an array to point at with this pointer. When compiling
-with gcc >= 3 it is typesafe. Note this is a wrapper of talloc_array_size()
-and talloc_get_name() will return the current location in the source file.
-and not the type.
-
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
-void *talloc_realloc_fn(const void *ctx, void *ptr, size_t size);
-
-This is a non-macro version of talloc_realloc(), which is useful
-as libraries sometimes want a ralloc function pointer. A realloc()
-implementation encapsulates the functionality of malloc(), free() and
-realloc() in one call, which is why it is useful to be able to pass
-around a single function pointer.
-
-
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
-void *talloc_autofree_context(void);
-
-This is a handy utility function that returns a talloc context
-which will be automatically freed on program exit. This can be used
-to reduce the noise in memory leak reports.
-
-
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
-void *talloc_check_name(const void *ptr, const char *name);
-
-This function checks if a pointer has the specified name. If it does
-then the pointer is returned. It it doesn't then NULL is returned.
-
-
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
-(type *)talloc_get_type(const void *ptr, type);
-
-This macro allows you to do type checking on talloc pointers. It is
-particularly useful for void* private pointers. It is equivalent to
-this:
-
- (type *)talloc_check_name(ptr, #type)
-
-
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
-talloc_set_type(const void *ptr, type);
-
-This macro allows you to force the name of a pointer to be a
-particular type. This can be used in conjunction with
-talloc_get_type() to do type checking on void* pointers.
-
-It is equivalent to this:
- talloc_set_name_const(ptr, #type)
-
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
-talloc_get_size(const void *ctx);
-
-This function lets you know the amount of memory alloced so far by
-this context. It does NOT account for subcontext memory.
-This can be used to calculate the size of an array.
-
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
-void *talloc_find_parent_byname(const void *ctx, const char *name);
-
-Find a parent memory context of the current context that has the given
-name. This can be very useful in complex programs where it may be
-difficult to pass all information down to the level you need, but you
-know the structure you want is a parent of another context.
-
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
-(type *)talloc_find_parent_bytype(ctx, type);
-
-Like talloc_find_parent_byname() but takes a type, making it typesafe.
-
+++ /dev/null
-/*
- Unix SMB/CIFS implementation.
-
- local testing of talloc routines.
-
- Copyright (C) Andrew Tridgell 2004
-
- ** 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 2 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, write to the Free Software
- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
-*/
-
-#include "replace.h"
-#include "system/time.h"
-#include "talloc.h"
-
-static struct timeval timeval_current(void)
-{
- struct timeval tv;
- gettimeofday(&tv, NULL);
- return tv;
-}
-
-static double timeval_elapsed(struct timeval *tv)
-{
- struct timeval tv2 = timeval_current();
- return (tv2.tv_sec - tv->tv_sec) +
- (tv2.tv_usec - tv->tv_usec)*1.0e-6;
-}
-
-#define torture_assert(test, expr, str) if (!(expr)) { \
- printf("failure: %s [\n%s: Expression %s failed: %s\n]\n", \
- test, __location__, #expr, str); \
- return false; \
-}
-
-#define torture_assert_str_equal(test, arg1, arg2, desc) \
- if (strcmp(arg1, arg2)) { \
- printf("failure: %s [\n%s: Expected %s, got %s: %s\n]\n", \
- test, __location__, arg1, arg2, desc); \
- return false; \
- }
-
-#if _SAMBA_BUILD_==3
-#ifdef malloc
-#undef malloc
-#endif
-#ifdef strdup
-#undef strdup
-#endif
-#endif
-
-#define CHECK_SIZE(test, ptr, tsize) do { \
- if (talloc_total_size(ptr) != (tsize)) { \
- printf("failed: %s [\nwrong '%s' tree size: got %u expected %u\n]\n", \
- test, #ptr, \
- (unsigned)talloc_total_size(ptr), \
- (unsigned)tsize); \
- talloc_report_full(ptr, stdout); \
- return false; \
- } \
-} while (0)
-
-#define CHECK_BLOCKS(test, ptr, tblocks) do { \
- if (talloc_total_blocks(ptr) != (tblocks)) { \
- printf("failed: %s [\nwrong '%s' tree blocks: got %u expected %u\n]\n", \
- test, #ptr, \
- (unsigned)talloc_total_blocks(ptr), \
- (unsigned)tblocks); \
- talloc_report_full(ptr, stdout); \
- return false; \
- } \
-} while (0)
-
-#define CHECK_PARENT(test, ptr, parent) do { \
- if (talloc_parent(ptr) != (parent)) { \
- printf("failed: %s [\n'%s' has wrong parent: got %p expected %p\n]\n", \
- test, #ptr, \
- talloc_parent(ptr), \
- (parent)); \
- talloc_report_full(ptr, stdout); \
- talloc_report_full(parent, stdout); \
- talloc_report_full(NULL, stdout); \
- return false; \
- } \
-} while (0)
-
-
-/*
- test references
-*/
-static bool test_ref1(void)
-{
- void *root, *p1, *p2, *ref, *r1;
-
- printf("test: ref1 [\nSINGLE REFERENCE FREE\n]\n");
-
- root = talloc_named_const(NULL, 0, "root");
- p1 = talloc_named_const(root, 1, "p1");
- p2 = talloc_named_const(p1, 1, "p2");
- talloc_named_const(p1, 1, "x1");
- talloc_named_const(p1, 2, "x2");
- talloc_named_const(p1, 3, "x3");
-
- r1 = talloc_named_const(root, 1, "r1");
- ref = talloc_reference(r1, p2);
- talloc_report_full(root, stderr);
-
- CHECK_BLOCKS("ref1", p1, 5);
- CHECK_BLOCKS("ref1", p2, 1);
- CHECK_BLOCKS("ref1", r1, 2);
-
- fprintf(stderr, "Freeing p2\n");
- talloc_free(p2);
- talloc_report_full(root, stderr);
-
- CHECK_BLOCKS("ref1", p1, 5);
- CHECK_BLOCKS("ref1", p2, 1);
- CHECK_BLOCKS("ref1", r1, 1);
-
- fprintf(stderr, "Freeing p1\n");
- talloc_free(p1);
- talloc_report_full(root, stderr);
-
- CHECK_BLOCKS("ref1", r1, 1);
-
- fprintf(stderr, "Freeing r1\n");
- talloc_free(r1);
- talloc_report_full(NULL, stderr);
-
- fprintf(stderr, "Testing NULL\n");
- if (talloc_reference(root, NULL)) {
- return false;
- }
-
- CHECK_BLOCKS("ref1", root, 1);
-
- CHECK_SIZE("ref1", root, 0);
-
- talloc_free(root);
- printf("success: ref1\n");
- return true;
-}
-
-/*
- test references
-*/
-static bool test_ref2(void)
-{
- void *root, *p1, *p2, *ref, *r1;
-
- printf("test: ref2 [\nDOUBLE REFERENCE FREE\n]\n");
- root = talloc_named_const(NULL, 0, "root");
- p1 = talloc_named_const(root, 1, "p1");
- talloc_named_const(p1, 1, "x1");
- talloc_named_const(p1, 1, "x2");
- talloc_named_const(p1, 1, "x3");
- p2 = talloc_named_const(p1, 1, "p2");
-
- r1 = talloc_named_const(root, 1, "r1");
- ref = talloc_reference(r1, p2);
- talloc_report_full(root, stderr);
-
- CHECK_BLOCKS("ref2", p1, 5);
- CHECK_BLOCKS("ref2", p2, 1);
- CHECK_BLOCKS("ref2", r1, 2);
-
- fprintf(stderr, "Freeing ref\n");
- talloc_free(ref);
- talloc_report_full(root, stderr);
-
- CHECK_BLOCKS("ref2", p1, 5);
- CHECK_BLOCKS("ref2", p2, 1);
- CHECK_BLOCKS("ref2", r1, 1);
-
- fprintf(stderr, "Freeing p2\n");
- talloc_free(p2);
- talloc_report_full(root, stderr);
-
- CHECK_BLOCKS("ref2", p1, 4);
- CHECK_BLOCKS("ref2", r1, 1);
-
- fprintf(stderr, "Freeing p1\n");
- talloc_free(p1);
- talloc_report_full(root, stderr);
-
- CHECK_BLOCKS("ref2", r1, 1);
-
- fprintf(stderr, "Freeing r1\n");
- talloc_free(r1);
- talloc_report_full(root, stderr);
-
- CHECK_SIZE("ref2", root, 0);
-
- talloc_free(root);
- printf("success: ref2\n");
- return true;
-}
-
-/*
- test references
-*/
-static bool test_ref3(void)
-{
- void *root, *p1, *p2, *ref, *r1;
-
- printf("test: ref3 [\nPARENT REFERENCE FREE\n]\n");
-
- root = talloc_named_const(NULL, 0, "root");
- p1 = talloc_named_const(root, 1, "p1");
- p2 = talloc_named_const(root, 1, "p2");
- r1 = talloc_named_const(p1, 1, "r1");
- ref = talloc_reference(p2, r1);
- talloc_report_full(root, stderr);
-
- CHECK_BLOCKS("ref3", p1, 2);
- CHECK_BLOCKS("ref3", p2, 2);
- CHECK_BLOCKS("ref3", r1, 1);
-
- fprintf(stderr, "Freeing p1\n");
- talloc_free(p1);
- talloc_report_full(root, stderr);
-
- CHECK_BLOCKS("ref3", p2, 2);
- CHECK_BLOCKS("ref3", r1, 1);
-
- fprintf(stderr, "Freeing p2\n");
- talloc_free(p2);
- talloc_report_full(root, stderr);
-
- CHECK_SIZE("ref3", root, 0);
-
- talloc_free(root);
-
- printf("success: ref3\n");
- return true;
-}
-
-/*
- test references
-*/
-static bool test_ref4(void)
-{
- void *root, *p1, *p2, *ref, *r1;
-
- printf("test: ref4 [\nREFERRER REFERENCE FREE\n]\n");
-
- root = talloc_named_const(NULL, 0, "root");
- p1 = talloc_named_const(root, 1, "p1");
- talloc_named_const(p1, 1, "x1");
- talloc_named_const(p1, 1, "x2");
- talloc_named_const(p1, 1, "x3");
- p2 = talloc_named_const(p1, 1, "p2");
-
- r1 = talloc_named_const(root, 1, "r1");
- ref = talloc_reference(r1, p2);
- talloc_report_full(root, stderr);
-
- CHECK_BLOCKS("ref4", p1, 5);
- CHECK_BLOCKS("ref4", p2, 1);
- CHECK_BLOCKS("ref4", r1, 2);
-
- fprintf(stderr, "Freeing r1\n");
- talloc_free(r1);
- talloc_report_full(root, stderr);
-
- CHECK_BLOCKS("ref4", p1, 5);
- CHECK_BLOCKS("ref4", p2, 1);
-
- fprintf(stderr, "Freeing p2\n");
- talloc_free(p2);
- talloc_report_full(root, stderr);
-
- CHECK_BLOCKS("ref4", p1, 4);
-
- fprintf(stderr, "Freeing p1\n");
- talloc_free(p1);
- talloc_report_full(root, stderr);
-
- CHECK_SIZE("ref4", root, 0);
-
- talloc_free(root);
-
- printf("success: ref4\n");
- return true;
-}
-
-
-/*
- test references
-*/
-static bool test_unlink1(void)
-{
- void *root, *p1, *p2, *ref, *r1;
-
- printf("test: unlink [\nUNLINK\n]\n");
-
- root = talloc_named_const(NULL, 0, "root");
- p1 = talloc_named_const(root, 1, "p1");
- talloc_named_const(p1, 1, "x1");
- talloc_named_const(p1, 1, "x2");
- talloc_named_const(p1, 1, "x3");
- p2 = talloc_named_const(p1, 1, "p2");
-
- r1 = talloc_named_const(p1, 1, "r1");
- ref = talloc_reference(r1, p2);
- talloc_report_full(root, stderr);
-
- CHECK_BLOCKS("unlink", p1, 7);
- CHECK_BLOCKS("unlink", p2, 1);
- CHECK_BLOCKS("unlink", r1, 2);
-
- fprintf(stderr, "Unreferencing r1\n");
- talloc_unlink(r1, p2);
- talloc_report_full(root, stderr);
-
- CHECK_BLOCKS("unlink", p1, 6);
- CHECK_BLOCKS("unlink", p2, 1);
- CHECK_BLOCKS("unlink", r1, 1);
-
- fprintf(stderr, "Freeing p1\n");
- talloc_free(p1);
- talloc_report_full(root, stderr);
-
- CHECK_SIZE("unlink", root, 0);
-
- talloc_free(root);
-
- printf("success: unlink\n");
- return true;
-}
-
-static int fail_destructor(void *ptr)
-{
- return -1;
-}
-
-/*
- miscellaneous tests to try to get a higher test coverage percentage
-*/
-static bool test_misc(void)
-{
- void *root, *p1;
- char *p2;
- double *d;
- const char *name;
-
- printf("test: misc [\nMISCELLANEOUS\n]\n");
-
- root = talloc_new(NULL);
-
- p1 = talloc_size(root, 0x7fffffff);
- torture_assert("misc", !p1, "failed: large talloc allowed\n");
-
- p1 = talloc_strdup(root, "foo");
- talloc_increase_ref_count(p1);
- talloc_increase_ref_count(p1);
- talloc_increase_ref_count(p1);
- CHECK_BLOCKS("misc", p1, 1);
- CHECK_BLOCKS("misc", root, 2);
- talloc_free(p1);
- CHECK_BLOCKS("misc", p1, 1);
- CHECK_BLOCKS("misc", root, 2);
- talloc_unlink(NULL, p1);
- CHECK_BLOCKS("misc", p1, 1);
- CHECK_BLOCKS("misc", root, 2);
- p2 = talloc_strdup(p1, "foo");
- torture_assert("misc", talloc_unlink(root, p2) == -1,
- "failed: talloc_unlink() of non-reference context should return -1\n");
- torture_assert("misc", talloc_unlink(p1, p2) == 0,
- "failed: talloc_unlink() of parent should succeed\n");
- talloc_free(p1);
- CHECK_BLOCKS("misc", p1, 1);
- CHECK_BLOCKS("misc", root, 2);
-
- name = talloc_set_name(p1, "my name is %s", "foo");
- torture_assert_str_equal("misc", talloc_get_name(p1), "my name is foo",
- "failed: wrong name after talloc_set_name(my name is foo)");
- CHECK_BLOCKS("misc", p1, 2);
- CHECK_BLOCKS("misc", root, 3);
-
- talloc_set_name_const(p1, NULL);
- torture_assert_str_equal ("misc", talloc_get_name(p1), "UNNAMED",
- "failed: wrong name after talloc_set_name(NULL)");
- CHECK_BLOCKS("misc", p1, 2);
- CHECK_BLOCKS("misc", root, 3);
-
- torture_assert("misc", talloc_free(NULL) == -1,
- "talloc_free(NULL) should give -1\n");
-
- talloc_set_destructor(p1, fail_destructor);
- torture_assert("misc", talloc_free(p1) == -1,
- "Failed destructor should cause talloc_free to fail\n");
- talloc_set_destructor(p1, NULL);
-
- talloc_report(root, stderr);
-
-
- p2 = (char *)talloc_zero_size(p1, 20);
- torture_assert("misc", p2[19] == 0, "Failed to give zero memory\n");
- talloc_free(p2);
-
- torture_assert("misc", talloc_strdup(root, NULL) == NULL,
- "failed: strdup on NULL should give NULL\n");
-
- p2 = talloc_strndup(p1, "foo", 2);
- torture_assert("misc", strcmp("fo", p2) == 0,
- "strndup doesn't work\n");
- p2 = talloc_asprintf_append(p2, "o%c", 'd');
- torture_assert("misc", strcmp("food", p2) == 0,
- "talloc_asprintf_append doesn't work\n");
- CHECK_BLOCKS("misc", p2, 1);
- CHECK_BLOCKS("misc", p1, 3);
-
- p2 = talloc_asprintf_append(NULL, "hello %s", "world");
- torture_assert("misc", strcmp("hello world", p2) == 0,
- "talloc_asprintf_append doesn't work\n");
- CHECK_BLOCKS("misc", p2, 1);
- CHECK_BLOCKS("misc", p1, 3);
- talloc_free(p2);
-
- d = talloc_array(p1, double, 0x20000000);
- torture_assert("misc", !d, "failed: integer overflow not detected\n");
-
- d = talloc_realloc(p1, d, double, 0x20000000);
- torture_assert("misc", !d, "failed: integer overflow not detected\n");
-
- talloc_free(p1);
- CHECK_BLOCKS("misc", root, 1);
-
- p1 = talloc_named(root, 100, "%d bytes", 100);
- CHECK_BLOCKS("misc", p1, 2);
- CHECK_BLOCKS("misc", root, 3);
- talloc_unlink(root, p1);
-
- p1 = talloc_init("%d bytes", 200);
- p2 = talloc_asprintf(p1, "my test '%s'", "string");
- torture_assert_str_equal("misc", p2, "my test 'string'",
- "failed: talloc_asprintf(\"my test '%%s'\", \"string\") gave: \"%s\"");
- CHECK_BLOCKS("misc", p1, 3);
- CHECK_SIZE("misc", p2, 17);
- CHECK_BLOCKS("misc", root, 1);
- talloc_unlink(NULL, p1);
-
- p1 = talloc_named_const(root, 10, "p1");
- p2 = (char *)talloc_named_const(root, 20, "p2");
- (void)talloc_reference(p1, p2);
- talloc_report_full(root, stderr);
- talloc_unlink(root, p2);
- talloc_report_full(root, stderr);
- CHECK_BLOCKS("misc", p2, 1);
- CHECK_BLOCKS("misc", p1, 2);
- CHECK_BLOCKS("misc", root, 3);
- talloc_unlink(p1, p2);
- talloc_unlink(root, p1);
-
- p1 = talloc_named_const(root, 10, "p1");
- p2 = (char *)talloc_named_const(root, 20, "p2");
- (void)talloc_reference(NULL, p2);
- talloc_report_full(root, stderr);
- talloc_unlink(root, p2);
- talloc_report_full(root, stderr);
- CHECK_BLOCKS("misc", p2, 1);
- CHECK_BLOCKS("misc", p1, 1);
- CHECK_BLOCKS("misc", root, 2);
- talloc_unlink(NULL, p2);
- talloc_unlink(root, p1);
-
- /* Test that talloc_unlink is a no-op */
-
- torture_assert("misc", talloc_unlink(root, NULL) == -1,
- "failed: talloc_unlink(root, NULL) == -1\n");
-
- talloc_report(root, stderr);
- talloc_report(NULL, stderr);
-
- CHECK_SIZE("misc", root, 0);
-
- talloc_free(root);
-
- CHECK_SIZE("misc", NULL, 0);
-
- talloc_enable_leak_report();
- talloc_enable_leak_report_full();
-
- printf("success: misc\n");
-
- return true;
-}
-
-
-/*
- test realloc
-*/
-static bool test_realloc(void)
-{
- void *root, *p1, *p2;
-
- printf("test: realloc [\nREALLOC\n]\n");
-
- root = talloc_new(NULL);
-
- p1 = talloc_size(root, 10);
- CHECK_SIZE("realloc", p1, 10);
-
- p1 = talloc_realloc_size(NULL, p1, 20);
- CHECK_SIZE("realloc", p1, 20);
-
- talloc_new(p1);
-
- p2 = talloc_realloc_size(p1, NULL, 30);
-
- talloc_new(p1);
-
- p2 = talloc_realloc_size(p1, p2, 40);
-
- CHECK_SIZE("realloc", p2, 40);
- CHECK_SIZE("realloc", root, 60);
- CHECK_BLOCKS("realloc", p1, 4);
-
- p1 = talloc_realloc_size(NULL, p1, 20);
- CHECK_SIZE("realloc", p1, 60);
-
- talloc_increase_ref_count(p2);
- torture_assert("realloc", talloc_realloc_size(NULL, p2, 5) == NULL,
- "failed: talloc_realloc() on a referenced pointer should fail\n");
- CHECK_BLOCKS("realloc", p1, 4);
-
- talloc_realloc_size(NULL, p2, 0);
- talloc_realloc_size(NULL, p2, 0);
- CHECK_BLOCKS("realloc", p1, 3);
-
- torture_assert("realloc", talloc_realloc_size(NULL, p1, 0x7fffffff) == NULL,
- "failed: oversize talloc should fail\n");
-
- talloc_realloc_size(NULL, p1, 0);
-
- CHECK_BLOCKS("realloc", root, 1);
- CHECK_SIZE("realloc", root, 0);
-
- talloc_free(root);
-
- printf("success: REALLOC\n");
-
- return true;
-}
-
-/*
- test realloc with a child
-*/
-static bool test_realloc_child(void)
-{
- void *root;
- struct el2 {
- const char *name;
- } *el2;
- struct el1 {
- int count;
- struct el2 **list, **list2, **list3;
- } *el1;
-
- printf("test: REALLOC WITH CHILD\n");
-
- root = talloc_new(NULL);
-
- el1 = talloc(root, struct el1);
- el1->list = talloc(el1, struct el2 *);
- el1->list[0] = talloc(el1->list, struct el2);
- el1->list[0]->name = talloc_strdup(el1->list[0], "testing");
-
- el1->list2 = talloc(el1, struct el2 *);
- el1->list2[0] = talloc(el1->list2, struct el2);
- el1->list2[0]->name = talloc_strdup(el1->list2[0], "testing2");
-
- el1->list3 = talloc(el1, struct el2 *);
- el1->list3[0] = talloc(el1->list3, struct el2);
- el1->list3[0]->name = talloc_strdup(el1->list3[0], "testing2");
-
- el2 = talloc(el1->list, struct el2);
- el2 = talloc(el1->list2, struct el2);
- el2 = talloc(el1->list3, struct el2);
-
- el1->list = talloc_realloc(el1, el1->list, struct el2 *, 100);
- el1->list2 = talloc_realloc(el1, el1->list2, struct el2 *, 200);
- el1->list3 = talloc_realloc(el1, el1->list3, struct el2 *, 300);
-
- talloc_free(root);
-
- printf("success: REALLOC WITH CHILD\n");
- return true;
-}
-
-/*
- test type checking
-*/
-static bool test_type(void)
-{
- void *root;
- struct el1 {
- int count;
- };
- struct el2 {
- int count;
- };
- struct el1 *el1;
-
- printf("test: type [\ntalloc type checking\n]\n");
-
- root = talloc_new(NULL);
-
- el1 = talloc(root, struct el1);
-
- el1->count = 1;
-
- torture_assert("type", talloc_get_type(el1, struct el1) == el1,
- "type check failed on el1\n");
- torture_assert("type", talloc_get_type(el1, struct el2) == NULL,
- "type check failed on el1 with el2\n");
- talloc_set_type(el1, struct el2);
- torture_assert("type", talloc_get_type(el1, struct el2) == (struct el2 *)el1,
- "type set failed on el1 with el2\n");
-
- talloc_free(root);
-
- printf("success: type\n");
- return true;
-}
-
-/*
- test steal
-*/
-static bool test_steal(void)
-{
- void *root, *p1, *p2;
-
- printf("test: steal [\nSTEAL\n]\n");
-
- root = talloc_new(NULL);
-
- p1 = talloc_array(root, char, 10);
- CHECK_SIZE("steal", p1, 10);
-
- p2 = talloc_realloc(root, NULL, char, 20);
- CHECK_SIZE("steal", p1, 10);
- CHECK_SIZE("steal", root, 30);
-
- torture_assert("steal", talloc_steal(p1, NULL) == NULL,
- "failed: stealing NULL should give NULL\n");
-
- torture_assert("steal", talloc_steal(p1, p1) == p1,
- "failed: stealing to ourselves is a nop\n");
- CHECK_BLOCKS("steal", root, 3);
- CHECK_SIZE("steal", root, 30);
-
- talloc_steal(NULL, p1);
- talloc_steal(NULL, p2);
- CHECK_BLOCKS("steal", root, 1);
- CHECK_SIZE("steal", root, 0);
-
- talloc_free(p1);
- talloc_steal(root, p2);
- CHECK_BLOCKS("steal", root, 2);
- CHECK_SIZE("steal", root, 20);
-
- talloc_free(p2);
-
- CHECK_BLOCKS("steal", root, 1);
- CHECK_SIZE("steal", root, 0);
-
- talloc_free(root);
-
- p1 = talloc_size(NULL, 3);
- talloc_report_full(NULL, stderr);
- CHECK_SIZE("steal", NULL, 3);
- talloc_free(p1);
-
- printf("success: steal\n");
- return true;
-}
-
-/*
- test move
-*/
-static bool test_move(void)
-{
- void *root;
- struct t_move {
- char *p;
- int *x;
- } *t1, *t2;
-
- printf("test: move [\nMOVE\n]\n");
-
- root = talloc_new(NULL);
-
- t1 = talloc(root, struct t_move);
- t2 = talloc(root, struct t_move);
- t1->p = talloc_strdup(t1, "foo");
- t1->x = talloc(t1, int);
- *t1->x = 42;
-
- t2->p = talloc_move(t2, &t1->p);
- t2->x = talloc_move(t2, &t1->x);
- torture_assert("move", t1->p == NULL && t1->x == NULL &&
- strcmp(t2->p, "foo") == 0 && *t2->x == 42,
- "talloc move failed");
-
- talloc_free(root);
-
- printf("success: move\n");
-
- return true;
-}
-
-/*
- test talloc_realloc_fn
-*/
-static bool test_realloc_fn(void)
-{
- void *root, *p1;
-
- printf("test: realloc_fn [\ntalloc_realloc_fn\n]\n");
-
- root = talloc_new(NULL);
-
- p1 = talloc_realloc_fn(root, NULL, 10);
- CHECK_BLOCKS("realloc_fn", root, 2);
- CHECK_SIZE("realloc_fn", root, 10);
- p1 = talloc_realloc_fn(root, p1, 20);
- CHECK_BLOCKS("realloc_fn", root, 2);
- CHECK_SIZE("realloc_fn", root, 20);
- p1 = talloc_realloc_fn(root, p1, 0);
- CHECK_BLOCKS("realloc_fn", root, 1);
- CHECK_SIZE("realloc_fn", root, 0);
-
- talloc_free(root);
-
- printf("success: realloc_fn\n");
- return true;
-}
-
-
-static bool test_unref_reparent(void)
-{
- void *root, *p1, *p2, *c1;
-
- printf("test: unref_reparent [\nUNREFERENCE AFTER PARENT FREED\n]\n");
-
- root = talloc_named_const(NULL, 0, "root");
- p1 = talloc_named_const(root, 1, "orig parent");
- p2 = talloc_named_const(root, 1, "parent by reference");
-
- c1 = talloc_named_const(p1, 1, "child");
- talloc_reference(p2, c1);
-
- CHECK_PARENT("unref_reparent", c1, p1);
-
- talloc_free(p1);
-
- CHECK_PARENT("unref_reparent", c1, p2);
-
- talloc_unlink(p2, c1);
-
- CHECK_SIZE("unref_reparent", root, 1);
-
- talloc_free(p2);
- talloc_free(root);
-
- printf("success: unref_reparent\n");
- return true;
-}
-
-/*
- measure the speed of talloc versus malloc
-*/
-static bool test_speed(void)
-{
- void *ctx = talloc_new(NULL);
- unsigned count;
- const int loop = 1000;
- int i;
- struct timeval tv;
-
- printf("test: speed [\nTALLOC VS MALLOC SPEED\n]\n");
-
- tv = timeval_current();
- count = 0;
- do {
- void *p1, *p2, *p3;
- for (i=0;i<loop;i++) {
- p1 = talloc_size(ctx, loop % 100);
- p2 = talloc_strdup(p1, "foo bar");
- p3 = talloc_size(p1, 300);
- talloc_free(p1);
- }
- count += 3 * loop;
- } while (timeval_elapsed(&tv) < 5.0);
-
- fprintf(stderr, "talloc: %.0f ops/sec\n", count/timeval_elapsed(&tv));
-
- talloc_free(ctx);
-
- tv = timeval_current();
- count = 0;
- do {
- void *p1, *p2, *p3;
- for (i=0;i<loop;i++) {
- p1 = malloc(loop % 100);
- p2 = strdup("foo bar");
- p3 = malloc(300);
- free(p1);
- free(p2);
- free(p3);
- }
- count += 3 * loop;
- } while (timeval_elapsed(&tv) < 5.0);
- fprintf(stderr, "malloc: %.0f ops/sec\n", count/timeval_elapsed(&tv));
-
- printf("success: speed\n");
-
- return true;
-}
-
-static bool test_lifeless(void)
-{
- void *top = talloc_new(NULL);
- char *parent, *child;
- void *child_owner = talloc_new(NULL);
-
- printf("test: lifeless [\nTALLOC_UNLINK LOOP\n]\n");
-
- parent = talloc_strdup(top, "parent");
- child = talloc_strdup(parent, "child");
- (void)talloc_reference(child, parent);
- (void)talloc_reference(child_owner, child);
- talloc_report_full(top, stderr);
- talloc_unlink(top, parent);
- talloc_free(child);
- talloc_report_full(top, stderr);
- talloc_free(top);
- talloc_free(child_owner);
- talloc_free(child);
-
- printf("success: lifeless\n");
- return true;
-}
-
-static int loop_destructor_count;
-
-static int test_loop_destructor(char *ptr)
-{
- loop_destructor_count++;
- return 0;
-}
-
-static bool test_loop(void)
-{
- void *top = talloc_new(NULL);
- char *parent;
- struct req1 {
- char *req2, *req3;
- } *req1;
-
- printf("test: loop [\nTALLOC LOOP DESTRUCTION\n]\n");
-
- parent = talloc_strdup(top, "parent");
- req1 = talloc(parent, struct req1);
- req1->req2 = talloc_strdup(req1, "req2");
- talloc_set_destructor(req1->req2, test_loop_destructor);
- req1->req3 = talloc_strdup(req1, "req3");
- (void)talloc_reference(req1->req3, req1);
- talloc_report_full(top, stderr);
- talloc_free(parent);
- talloc_report_full(top, stderr);
- talloc_report_full(NULL, stderr);
- talloc_free(top);
-
- torture_assert("loop", loop_destructor_count == 1,
- "FAILED TO FIRE LOOP DESTRUCTOR\n");
- loop_destructor_count = 0;
-
- printf("success: loop\n");
- return true;
-}
-
-static int fail_destructor_str(char *ptr)
-{
- return -1;
-}
-
-static bool test_free_parent_deny_child(void)
-{
- void *top = talloc_new(NULL);
- char *level1;
- char *level2;
- char *level3;
-
- printf("test: free_parent_deny_child [\nTALLOC FREE PARENT DENY CHILD\n]\n");
-
- level1 = talloc_strdup(top, "level1");
- level2 = talloc_strdup(level1, "level2");
- level3 = talloc_strdup(level2, "level3");
-
- talloc_set_destructor(level3, fail_destructor_str);
- talloc_free(level1);
- talloc_set_destructor(level3, NULL);
-
- CHECK_PARENT("free_parent_deny_child", level3, top);
-
- talloc_free(top);
-
- printf("success: free_parent_deny_child\n");
- return true;
-}
-
-static bool test_talloc_ptrtype(void)
-{
- void *top = talloc_new(NULL);
- struct struct1 {
- int foo;
- int bar;
- } *s1, *s2, **s3, ***s4;
- const char *location1;
- const char *location2;
- const char *location3;
- const char *location4;
-
- printf("test: ptrtype [\nTALLOC PTRTYPE\n]\n");
-
- s1 = talloc_ptrtype(top, s1);location1 = __location__;
-
- if (talloc_get_size(s1) != sizeof(struct struct1)) {
- printf("failure: ptrtype [\n"
- "talloc_ptrtype() allocated the wrong size %lu (should be %lu)\n"
- "]\n", (unsigned long)talloc_get_size(s1),
- (unsigned long)sizeof(struct struct1));
- return false;
- }
-
- if (strcmp(location1, talloc_get_name(s1)) != 0) {
- printf("failure: ptrtype [\n"
- "talloc_ptrtype() sets the wrong name '%s' (should be '%s')\n]\n",
- talloc_get_name(s1), location1);
- return false;
- }
-
- s2 = talloc_array_ptrtype(top, s2, 10);location2 = __location__;
-
- if (talloc_get_size(s2) != (sizeof(struct struct1) * 10)) {
- printf("failure: ptrtype [\n"
- "talloc_array_ptrtype() allocated the wrong size "
- "%lu (should be %lu)\n]\n",
- (unsigned long)talloc_get_size(s2),
- (unsigned long)(sizeof(struct struct1)*10));
- return false;
- }
-
- if (strcmp(location2, talloc_get_name(s2)) != 0) {
- printf("failure: ptrtype [\n"
- "talloc_array_ptrtype() sets the wrong name '%s' (should be '%s')\n]\n",
- talloc_get_name(s2), location2);
- return false;
- }
-
- s3 = talloc_array_ptrtype(top, s3, 10);location3 = __location__;
-
- if (talloc_get_size(s3) != (sizeof(struct struct1 *) * 10)) {
- printf("failure: ptrtype [\n"
- "talloc_array_ptrtype() allocated the wrong size "
- "%lu (should be %lu)\n]\n",
- (unsigned long)talloc_get_size(s3),
- (unsigned long)(sizeof(struct struct1 *)*10));
- return false;
- }
-
- torture_assert_str_equal("ptrtype", location3, talloc_get_name(s3),
- "talloc_array_ptrtype() sets the wrong name");
-
- s4 = talloc_array_ptrtype(top, s4, 10);location4 = __location__;
-
- if (talloc_get_size(s4) != (sizeof(struct struct1 **) * 10)) {
- printf("failure: ptrtype [\n"
- "talloc_array_ptrtype() allocated the wrong size "
- "%lu (should be %lu)\n]\n",
- (unsigned long)talloc_get_size(s4),
- (unsigned long)(sizeof(struct struct1 **)*10));
- return false;
- }
-
- torture_assert_str_equal("ptrtype", location4, talloc_get_name(s4),
- "talloc_array_ptrtype() sets the wrong name");
-
- talloc_free(top);
-
- printf("success: ptrtype\n");
- return true;
-}
-
-static int _test_talloc_free_in_destructor(void **ptr)
-{
- talloc_free(*ptr);
- return 0;
-}
-
-static bool test_talloc_free_in_destructor(void)
-{
- void *level0;
- void *level1;
- void *level2;
- void *level3;
- void *level4;
- void **level5;
-
- printf("test: free_in_destructor [\nTALLOC FREE IN DESTRUCTOR\n]\n");
-
- level0 = talloc_new(NULL);
- level1 = talloc_new(level0);
- level2 = talloc_new(level1);
- level3 = talloc_new(level2);
- level4 = talloc_new(level3);
- level5 = talloc(level4, void *);
-
- *level5 = level3;
- (void)talloc_reference(level0, level3);
- (void)talloc_reference(level3, level3);
- (void)talloc_reference(level5, level3);
-
- talloc_set_destructor(level5, _test_talloc_free_in_destructor);
-
- talloc_free(level1);
-
- talloc_free(level0);
-
- printf("success: free_in_destructor\n");
- return true;
-}
-
-static bool test_autofree(void)
-{
-#if _SAMBA_BUILD_ < 4
- /* autofree test would kill smbtorture */
- void *p;
- printf("test: autofree [\nTALLOC AUTOFREE CONTEXT\n]\n");
-
- p = talloc_autofree_context();
- talloc_free(p);
-
- p = talloc_autofree_context();
- talloc_free(p);
-
- printf("success: autofree\n");
-#endif
- return true;
-}
-
-struct torture_context;
-bool torture_local_talloc(struct torture_context *tctx)
-{
- bool ret = true;
-
- setlinebuf(stdout);
-
- talloc_disable_null_tracking();
- talloc_enable_null_tracking();
-
- ret &= test_ref1();
- ret &= test_ref2();
- ret &= test_ref3();
- ret &= test_ref4();
- ret &= test_unlink1();
- ret &= test_misc();
- ret &= test_realloc();
- ret &= test_realloc_child();
- ret &= test_steal();
- ret &= test_move();
- ret &= test_unref_reparent();
- ret &= test_realloc_fn();
- ret &= test_type();
- ret &= test_lifeless();
- ret &= test_loop();
- ret &= test_free_parent_deny_child();
- ret &= test_talloc_ptrtype();
- ret &= test_talloc_free_in_destructor();
-
- if (ret) {
- ret &= test_speed();
- }
- ret &= test_autofree();
-
- return ret;
-}
-
-#if _SAMBA_BUILD_ < 4
-int main(void)
-{
- bool ret = torture_local_talloc(NULL);
- if (!ret)
- return -1;
- return 0;
-}
-#endif
projects / ccan / commitdiff