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26 .TH PTHREAD_ATTR_SETSTACK 3 2014-04-21 "Linux" "Linux Programmer's Manual"
28 pthread_attr_setstack, pthread_attr_getstack \- set/get stack
29 attributes in thread attributes object
32 .B #include <pthread.h>
34 .BI "int pthread_attr_setstack(pthread_attr_t *" attr ,
35 .BI " void *" stackaddr ", size_t " stacksize );
36 .BI "int pthread_attr_getstack(pthread_attr_t *" attr ,
37 .BI " void **" stackaddr ", size_t *" stacksize );
39 Compile and link with \fI\-pthread\fP.
43 Feature Test Macro Requirements for glibc (see
44 .BR feature_test_macros (7)):
48 .BR pthread_attr_getstack (),
49 .BR pthread_attr_setstack ():
51 _POSIX_C_SOURCE\ >=\ 200112L || _XOPEN_SOURCE\ >=\ 600
56 .BR pthread_attr_setstack ()
57 function sets the stack address and stack size attributes of the
58 thread attributes object referred to by
60 to the values specified in
65 These attributes specify the location and size of the stack that should
66 be used by a thread that is created using the thread attributes object
70 should point to the lowest addressable byte of a buffer of
72 bytes that was allocated by the caller.
73 The pages of the allocated buffer should be both readable and writable.
76 .BR pthread_attr_getstack ()
77 function returns the stack address and stack size attributes of the
78 thread attributes object referred to by
80 in the buffers pointed to by
86 On success, these functions return 0;
87 on error, they return a nonzero error number.
89 .BR pthread_attr_setstack ()
90 can fail with the following error:
97 On some systems, this error may also occur if
100 .IR "stackaddr\ +\ stacksize"
101 is not suitably aligned.
103 POSIX.1-2001 also documents an
105 error if the stack area described by
109 is not both readable and writable by the caller.
111 These functions are provided by glibc since version 2.2.
113 .SS Multithreading (see pthreads(7))
115 .BR pthread_attr_setstack ()
117 .BR pthread_attr_getstack ()
118 functions are thread-safe.
122 These functions are provided for applications that must ensure that
123 a thread's stack is placed in a particular location.
124 For most applications, this is not necessary,
125 and the use of these functions should be avoided.
127 .BR pthread_attr_setstacksize (3)
128 if an application simply requires a stack size other than the default.)
130 When an application employs
131 .BR pthread_attr_setstack (),
132 it takes over the responsibility of allocating the stack.
133 Any guard size value that was set using
134 .BR pthread_attr_setguardsize (3)
137 it is the application's responsibility to allocate a guard area
138 (one or more pages protected against reading and writing)
139 to handle the possibility of stack overflow.
141 The address specified in
143 should be suitably aligned:
144 for full portability, align it on a page boundary
145 .RI ( sysconf(_SC_PAGESIZE) ).
146 .BR posix_memalign (3)
147 may be useful for allocation.
150 should also be a multiple of the system page size.
154 is used to create multiple threads, then the caller must change the
155 stack address attribute between calls to
156 .BR pthread_create (3);
157 otherwise, the threads will attempt to use the same memory area
158 for their stacks, and chaos will ensue.
161 .BR pthread_attr_init (3).
167 .BR posix_memalign (3),
168 .BR pthread_attr_init (3),
169 .BR pthread_attr_setguardsize (3),
170 .BR pthread_attr_setstackaddr (3),
171 .BR pthread_attr_setstacksize (3),
172 .BR pthread_create (3),
175 This page is part of release 3.67 of the Linux
178 A description of the project,
179 information about reporting bugs,
180 and the latest version of this page,
182 \%http://www.kernel.org/doc/man\-pages/.