Delete bundled copy of NSS and replace with README.

nspr/pr/src/misc/prthinfo.c

-/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
-/* This Source Code Form is subject to the terms of the Mozilla Public
- * License, v. 2.0. If a copy of the MPL was not distributed with this
- * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
-
-#include "prlog.h"
-#include "prthread.h"
-#include "private/pprthred.h"
-#include "primpl.h"
-
-PR_IMPLEMENT(PRWord *)
-PR_GetGCRegisters(PRThread *t, int isCurrent, int *np)
-{
-    return _MD_HomeGCRegisters(t, isCurrent, np);
-}
-
-PR_IMPLEMENT(PRStatus)
-PR_ThreadScanStackPointers(PRThread* t,
-                           PRScanStackFun scanFun, void* scanClosure)
-{
-    PRThread* current = PR_GetCurrentThread();
-    PRWord *sp, *esp, *p0;
-    int n;
-    void **ptd;
-    PRStatus status;
-    PRUint32 index;
-    int stack_end;
-
-    /*
-    ** Store the thread's registers in the thread structure so the GC
-    ** can scan them. Then scan them.
-    */
-    p0 = _MD_HomeGCRegisters(t, t == current, &n);
-    status = scanFun(t, (void**)p0, n, scanClosure);
-    if (status != PR_SUCCESS)
-        return status;
-
-    /* Scan the C stack for pointers into the GC heap */
-#if defined(XP_PC) && defined(WIN16)
-    /*
-    ** Under WIN16, the stack of the current thread is always mapped into
-    ** the "task stack" (at SS:xxxx).  So, if t is the current thread, scan
-    ** the "task stack".  Otherwise, scan the "cached stack" of the inactive
-    ** thread...
-    */
-    if (t == current) {
-        sp  = (PRWord*) &stack_end;
-        esp = (PRWord*) _pr_top_of_task_stack;
-
-        PR_ASSERT(sp <= esp);
-    } else {
-        sp  = (PRWord*) PR_GetSP(t);
-        esp = (PRWord*) t->stack->stackTop;
-
-        PR_ASSERT((t->stack->stackSize == 0) ||
-                  ((sp >  (PRWord*)t->stack->stackBottom) &&
-                   (sp <= (PRWord*)t->stack->stackTop)));
-    }
-#else   /* ! WIN16 */
-#ifdef HAVE_STACK_GROWING_UP
-    if (t == current) {
-        esp = (PRWord*) &stack_end;
-    } else {
-        esp = (PRWord*) PR_GetSP(t);
-    }
-    sp = (PRWord*) t->stack->stackTop;
-    if (t->stack->stackSize) {
-        PR_ASSERT((esp > (PRWord*)t->stack->stackTop) &&
-                  (esp < (PRWord*)t->stack->stackBottom));
-    }
-#else   /* ! HAVE_STACK_GROWING_UP */
-    if (t == current) {
-        sp = (PRWord*) &stack_end;
-    } else {
-        sp = (PRWord*) PR_GetSP(t);
-    }
-    esp = (PRWord*) t->stack->stackTop;
-    if (t->stack->stackSize) {
-        PR_ASSERT((sp > (PRWord*)t->stack->stackBottom) &&
-                  (sp < (PRWord*)t->stack->stackTop));
-    }
-#endif  /* ! HAVE_STACK_GROWING_UP */
-#endif  /* ! WIN16 */
-
-#if defined(WIN16)
-    {
-        prword_t scan;
-        prword_t limit;
-        
-        scan = (prword_t) sp;
-        limit = (prword_t) esp;
-        while (scan < limit) {
-            prword_t *test;
-
-            test = *((prword_t **)scan);
-            status = scanFun(t, (void**)&test, 1, scanClosure);
-            if (status != PR_SUCCESS)
-                return status;
-            scan += sizeof(char);
-        }
-    }
-#else
-    if (sp < esp) {
-        status = scanFun(t, (void**)sp, esp - sp, scanClosure);
-        if (status != PR_SUCCESS)
-            return status;
-    }
-#endif
-
-    /*
-    ** Mark all of the per-thread-data items attached to this thread
-    **
-    ** The execution environment better be accounted for otherwise it
-    ** will be collected
-    */
-    status = scanFun(t, (void**)&t->environment, 1, scanClosure);
-    if (status != PR_SUCCESS)
-        return status;
-
-    /* if thread is not allocated on stack, this is redundant. */
-    ptd = t->privateData;
-    for (index = 0; index < t->tpdLength; index++, ptd++) {
-        status = scanFun(t, (void**)ptd, 1, scanClosure);
-        if (status != PR_SUCCESS)
-            return status;
-    }
-    
-    return PR_SUCCESS;
-}
-
-/* transducer for PR_EnumerateThreads */
-typedef struct PRScanStackData {
-    PRScanStackFun      scanFun;
-    void*               scanClosure;
-} PRScanStackData;
-
-static PRStatus PR_CALLBACK
-pr_ScanStack(PRThread* t, int i, void* arg)
-{
-    PRScanStackData* data = (PRScanStackData*)arg;
-    return PR_ThreadScanStackPointers(t, data->scanFun, data->scanClosure);
-}
-
-PR_IMPLEMENT(PRStatus)
-PR_ScanStackPointers(PRScanStackFun scanFun, void* scanClosure)
-{
-    PRScanStackData data;
-    data.scanFun = scanFun;
-    data.scanClosure = scanClosure;
-    return PR_EnumerateThreads(pr_ScanStack, &data);
-}
-
-PR_IMPLEMENT(PRUword)
-PR_GetStackSpaceLeft(PRThread* t)
-{
-    PRThread *current = PR_GetCurrentThread();
-    PRWord *sp, *esp;
-    int stack_end;
-
-#if defined(WIN16)
-    /*
-    ** Under WIN16, the stack of the current thread is always mapped into
-    ** the "task stack" (at SS:xxxx).  So, if t is the current thread, scan
-    ** the "task stack".  Otherwise, scan the "cached stack" of the inactive
-    ** thread...
-    */
-    if (t == current) {
-        sp  = (PRWord*) &stack_end;
-        esp = (PRWord*) _pr_top_of_task_stack;
-
-        PR_ASSERT(sp <= esp);
-    } else {
-        sp  = (PRWord*) PR_GetSP(t);
-        esp = (PRWord*) t->stack->stackTop;
-
-        PR_ASSERT((t->stack->stackSize == 0) ||
-                 ((sp >  (PRWord*)t->stack->stackBottom) &&
-                  (sp <= (PRWord*)t->stack->stackTop)));
-    }
-#else   /* ! WIN16 */
-#ifdef HAVE_STACK_GROWING_UP
-    if (t == current) {
-        esp = (PRWord*) &stack_end;
-    } else {
-        esp = (PRWord*) PR_GetSP(t);
-    }
-    sp = (PRWord*) t->stack->stackTop;
-    if (t->stack->stackSize) {
-        PR_ASSERT((esp > (PRWord*)t->stack->stackTop) &&
-                  (esp < (PRWord*)t->stack->stackBottom));
-    }
-#else   /* ! HAVE_STACK_GROWING_UP */
-    if (t == current) {
-        sp = (PRWord*) &stack_end;
-    } else {
-        sp = (PRWord*) PR_GetSP(t);
-    }
-    esp = (PRWord*) t->stack->stackTop;
-    if (t->stack->stackSize) {
-        PR_ASSERT((sp > (PRWord*)t->stack->stackBottom) &&
-                  (sp < (PRWord*)t->stack->stackTop));
-    }
-#endif  /* ! HAVE_STACK_GROWING_UP */
-#endif  /* ! WIN16 */
-    return (PRUword)t->stack->stackSize - ((PRWord)esp - (PRWord)sp);
-}