diff options
Diffstat (limited to 'nsprpub/pr/src/threads/combined/prustack.c')
| -rw-r--r-- | nsprpub/pr/src/threads/combined/prustack.c | 133 |
1 files changed, 67 insertions, 66 deletions
diff --git a/nsprpub/pr/src/threads/combined/prustack.c b/nsprpub/pr/src/threads/combined/prustack.c index 59562bac4..3f5452c48 100644 --- a/nsprpub/pr/src/threads/combined/prustack.c +++ b/nsprpub/pr/src/threads/combined/prustack.c @@ -19,7 +19,7 @@ PRBool _pr_debugStacks = PR_FALSE; #endif /* How much space to leave between the stacks, at each end */ -#define REDZONE (2 << _pr_pageShift) +#define REDZONE (2 << _pr_pageShift) #define _PR_THREAD_STACK_PTR(_qp) \ ((PRThreadStack*) ((char*) (_qp) - offsetof(PRThreadStack,links))) @@ -54,22 +54,23 @@ PRThreadStack *_PR_NewStack(PRUint32 stackSize) PR_Lock(_pr_stackLock); qp = _pr_freeStacks.prev; while ((_pr_numFreeStacks > _pr_maxFreeStacks) && (qp != &_pr_freeStacks)) { - ts = _PR_THREAD_STACK_PTR(qp); - thr = _PR_THREAD_STACK_TO_PTR(ts); - qp = qp->prev; - /* - * skip stacks which are still being used - */ - if (thr->no_sched) - continue; - PR_REMOVE_LINK(&ts->links); - - /* Give platform OS to clear out the stack for debugging */ - _PR_MD_CLEAR_STACK(ts); - - _pr_numFreeStacks--; - _PR_DestroySegment(ts->seg); - PR_DELETE(ts); + ts = _PR_THREAD_STACK_PTR(qp); + thr = _PR_THREAD_STACK_TO_PTR(ts); + qp = qp->prev; + /* + * skip stacks which are still being used + */ + if (thr->no_sched) { + continue; + } + PR_REMOVE_LINK(&ts->links); + + /* Give platform OS to clear out the stack for debugging */ + _PR_MD_CLEAR_STACK(ts); + + _pr_numFreeStacks--; + _PR_DestroySegment(ts->seg); + PR_DELETE(ts); } /* @@ -79,51 +80,51 @@ PRThreadStack *_PR_NewStack(PRUint32 stackSize) qp = _pr_freeStacks.next; ts = 0; while (qp != &_pr_freeStacks) { - ts = _PR_THREAD_STACK_PTR(qp); - thr = _PR_THREAD_STACK_TO_PTR(ts); - qp = qp->next; - /* - * skip stacks which are still being used - */ - if ((!(thr->no_sched)) && ((ts->allocSize - 2*REDZONE) >= stackSize)) { - /* - ** Found a stack that is not in use and is big enough. Change - ** stackSize to fit it. - */ - stackSize = ts->allocSize - 2*REDZONE; - PR_REMOVE_LINK(&ts->links); - _pr_numFreeStacks--; - ts->links.next = 0; - ts->links.prev = 0; - PR_Unlock(_pr_stackLock); - goto done; - } - ts = 0; + ts = _PR_THREAD_STACK_PTR(qp); + thr = _PR_THREAD_STACK_TO_PTR(ts); + qp = qp->next; + /* + * skip stacks which are still being used + */ + if ((!(thr->no_sched)) && ((ts->allocSize - 2*REDZONE) >= stackSize)) { + /* + ** Found a stack that is not in use and is big enough. Change + ** stackSize to fit it. + */ + stackSize = ts->allocSize - 2*REDZONE; + PR_REMOVE_LINK(&ts->links); + _pr_numFreeStacks--; + ts->links.next = 0; + ts->links.prev = 0; + PR_Unlock(_pr_stackLock); + goto done; + } + ts = 0; } PR_Unlock(_pr_stackLock); if (!ts) { - /* Make a new thread stack object. */ - ts = PR_NEWZAP(PRThreadStack); - if (!ts) { - return NULL; - } - - /* - ** Assign some of the virtual space to the new stack object. We - ** may not get that piece of VM, but if nothing else we will - ** advance the pointer so we don't collide (unless the OS screws - ** up). - */ - ts->allocSize = stackSize + 2*REDZONE; - ts->seg = _PR_NewSegment(ts->allocSize, 0); - if (!ts->seg) { - PR_DELETE(ts); - return NULL; - } - } - - done: + /* Make a new thread stack object. */ + ts = PR_NEWZAP(PRThreadStack); + if (!ts) { + return NULL; + } + + /* + ** Assign some of the virtual space to the new stack object. We + ** may not get that piece of VM, but if nothing else we will + ** advance the pointer so we don't collide (unless the OS screws + ** up). + */ + ts->allocSize = stackSize + 2*REDZONE; + ts->seg = _PR_NewSegment(ts->allocSize, 0); + if (!ts->seg) { + PR_DELETE(ts); + return NULL; + } + } + +done: ts->allocBase = (char*)ts->seg->vaddr; ts->flags = _PR_STACK_MAPPED; ts->stackSize = stackSize; @@ -137,11 +138,11 @@ PRThreadStack *_PR_NewStack(PRUint32 stackSize) #endif PR_LOG(_pr_thread_lm, PR_LOG_NOTICE, - ("thread stack: base=0x%x limit=0x%x bottom=0x%x top=0x%x\n", - ts->allocBase, ts->allocBase + ts->allocSize - 1, - ts->allocBase + REDZONE, - ts->allocBase + REDZONE + stackSize - 1)); - + ("thread stack: base=0x%x limit=0x%x bottom=0x%x top=0x%x\n", + ts->allocBase, ts->allocBase + ts->allocSize - 1, + ts->allocBase + REDZONE, + ts->allocBase + REDZONE + stackSize - 1)); + _PR_MD_INIT_STACK(ts,REDZONE); return ts; @@ -153,11 +154,11 @@ PRThreadStack *_PR_NewStack(PRUint32 stackSize) void _PR_FreeStack(PRThreadStack *ts) { if (!ts) { - return; + return; } if (ts->flags & _PR_STACK_PRIMORDIAL) { - PR_DELETE(ts); - return; + PR_DELETE(ts); + return; } /* |