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authorEric Andersen <andersen@codepoet.org>2002-10-29 11:21:35 +0000
committerEric Andersen <andersen@codepoet.org>2002-10-29 11:21:35 +0000
commit5986069da6b6fd365c834e2b69c5e5ed2e5ca5c2 (patch)
treec711d86964e76e93ce45eceaedca86be1314a707 /libpthread
parent5fedc35ef2c219d4ada5a52993c20c8ea4a60c06 (diff)
A patch from Arne Jonsson <arne.jonsson@i3micro.com>:
Attached are the changes we think is necessary in order to use user defined stacksizes for each thread. When testing I forgot to lower the PTHREAD_STACK_MIN to the lowest value used for the stacks, this caused stranged reboots. As said before, we are using uClinux 2.0.38 on a ARM7TDMI.
Diffstat (limited to 'libpthread')
-rw-r--r--libpthread/linuxthreads/manager.c38
1 files changed, 22 insertions, 16 deletions
diff --git a/libpthread/linuxthreads/manager.c b/libpthread/linuxthreads/manager.c
index 78858eb65..1b513ca92 100644
--- a/libpthread/linuxthreads/manager.c
+++ b/libpthread/linuxthreads/manager.c
@@ -381,14 +381,20 @@ static int pthread_allocate_stack(const pthread_attr_t *attr,
* none provided by the user. Thus, we get around the mmap and reservation
* of a huge stack segment. -StS */
- char *new_stack;
-
- if ((new_stack = malloc(INITIAL_STACK_SIZE)) == NULL) {
- /* bad luck, we cannot malloc any more */
- return -1;
- }
-
- PDEBUG("malloced chunk: base=%p, size=0x%04x\n", new_stack, INITIAL_STACK_SIZE);
+ stacksize = INITIAL_STACK_SIZE;
+ /* The user may want to use a non-default stacksize */
+ if (attr != NULL)
+ {
+ stacksize = attr->__stacksize;
+ }
+
+ /* malloc a stack - memory from the bottom up */
+ if ((new_thread_bottom = malloc(stacksize)) == NULL)
+ {
+ /* bad luck, we cannot malloc any more */
+ return -1 ;
+ }
+ PDEBUG("malloced chunk: base=%p, size=0x%04x\n", new_thread_bottom, stacksize);
/* Set up the pointers. new_thread marks the TOP of the stack frame and
* the address of the pthread_descr struct at the same time. Therefore we
@@ -407,20 +413,18 @@ static int pthread_allocate_stack(const pthread_attr_t *attr,
* the kernel chokes on a non-aligned stack frame. Choose the lower
* available word boundary.
*/
- new_thread_bottom = (pthread_descr) new_stack;
- new_thread = (long)((char *) new_stack + INITIAL_STACK_SIZE - sizeof(*new_thread) - 1)
- & -sizeof(void*); /* align new_thread */
+ new_thread = ((pthread_descr) ((int)(new_thread_bottom + stacksize) & -sizeof(void*))) - 1;
guardaddr = NULL;
guardsize = 0;
-
+
PDEBUG("thread stack: bos=%p, tos=%p\n", new_thread_bottom, new_thread);
-
+
/* check the initial thread stack boundaries so they don't overlap */
- NOMMU_INITIAL_THREAD_BOUNDS(new_thread, new_thread_bottom);
-
+ NOMMU_INITIAL_THREAD_BOUNDS((char *) new_thread, (char *) new_thread_bottom);
+
PDEBUG("initial stack: bos=%p, tos=%p\n", __pthread_initial_thread_bos,
__pthread_initial_thread_tos);
-
+
/* on non-MMU systems we always have non-standard stack frames */
__pthread_nonstandard_stacks = 1;
@@ -571,10 +575,12 @@ static int pthread_handle_create(pthread_t *thread, const pthread_attr_t *attr,
}
}
if (pid == 0)
+ {
PDEBUG("cloning new_thread = %p\n", new_thread);
pid = clone(pthread_start_thread, (void **) new_thread,
CLONE_VM | CLONE_FS | CLONE_FILES | CLONE_SIGHAND |
__pthread_sig_cancel, new_thread);
+ }
/* Check if cloning succeeded */
if (pid == -1) {
/********************************************************