--- Libc/Libc-763.11/gen/thread_stack_pcs.c
+++ /dev/null
@@ -1,110 +0,0 @@
-/*
- * Copyright (c) 1999, 2007 Apple Inc. All rights reserved.
- *
- * @APPLE_LICENSE_HEADER_START@
- * 
- * This file contains Original Code and/or Modifications of Original Code
- * as defined in and that are subject to the Apple Public Source License
- * Version 2.0 (the 'License'). You may not use this file except in
- * compliance with the License. Please obtain a copy of the License at
- * http://www.opensource.apple.com/apsl/ and read it before using this
- * file.
- * 
- * The Original Code and all software distributed under the License are
- * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
- * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
- * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
- * Please see the License for the specific language governing rights and
- * limitations under the License.
- * 
- * @APPLE_LICENSE_HEADER_END@
- */
-
-/*	Bertrand from vmutils -> CF -> System */
-
-#include <pthread.h>
-#include <mach/mach.h>
-#include <mach/vm_statistics.h>
-#include <stdlib.h>
-
-#if defined(__i386__) || defined(__x86_64__) || defined(__arm__)
-#define FP_LINK_OFFSET 1
-#elif defined(__ppc__) || defined(__ppc64__)
-#define FP_LINK_OFFSET 2
-#else
-#error  ********** Unimplemented architecture
-#endif
-
-#define	INSTACK(a)	((a) >= stackbot && (a) <= stacktop)
-#if defined(__ppc__) || defined(__ppc64__) || defined(__x86_64__)
-#define	ISALIGNED(a)	((((uintptr_t)(a)) & 0xf) == 0)
-#elif defined(__arm__)
-#define	ISALIGNED(a)	((((uintptr_t)(a)) & 0x1) == 0)
-#elif defined(__i386__)
-#define	ISALIGNED(a)	((((uintptr_t)(a)) & 0xf) == 8)
-#endif
-
-__private_extern__  __attribute__((noinline))
-void
-_thread_stack_pcs(vm_address_t *buffer, unsigned max, unsigned *nb, unsigned skip)
-{
-    void *frame, *next;
-    pthread_t self = pthread_self();
-    void *stacktop = pthread_get_stackaddr_np(self);
-    void *stackbot = stacktop - pthread_get_stacksize_np(self);
-
-    *nb = 0;
-
-    /* make sure return address is never out of bounds */
-    stacktop -= (FP_LINK_OFFSET + 1) * sizeof(void *);
-
-    /*
-     * The original implementation called the first_frame_address() function,
-     * which returned the stack frame pointer.  The problem was that in ppc,
-     * it was a leaf function, so no new stack frame was set up with
-     * optimization turned on (while a new stack frame was set up without
-     * optimization).  We now inline the code to get the stack frame pointer,
-     * so we are consistent about the stack frame.
-     */
-#if defined(__i386__) || defined(__x86_64__) || defined(__arm__)
-    frame = __builtin_frame_address(0);
-#elif defined(__ppc__) || defined(__ppc64__)
-    /* __builtin_frame_address IS BROKEN IN BEAKER: RADAR #2340421 */
-    __asm__ volatile("mr %0, r1" : "=r" (frame));
-#endif
-    if(!INSTACK(frame) || !ISALIGNED(frame))
-	return;
-#if defined(__ppc__) || defined(__ppc64__)
-    /* back up the stack pointer up over the current stack frame */
-    next = *(void **)frame;
-    if(!INSTACK(next) || !ISALIGNED(next) || next <= frame)
-	return;
-    frame = next;
-#endif
-    while (skip--) {
-	next = *(void **)frame;
-	if(!INSTACK(next) || !ISALIGNED(next) || next <= frame)
-	    return;
-	frame = next;
-    }
-    while (max--) {
-        buffer[*nb] = *(vm_address_t *)(((void **)frame) + FP_LINK_OFFSET);
-        (*nb)++;
-	next = *(void **)frame;
-	if(!INSTACK(next) || !ISALIGNED(next) || next <= frame)
-	    return;
-	frame = next;
-    }
-}
-
-void
-thread_stack_pcs(vm_address_t *buffer, unsigned max, unsigned *nb)
-{
-    _thread_stack_pcs(buffer, max, nb, 0);
-
-    // The following prevents thread_stack_pcs() from getting tail-call-optimized into _thread_stack_pcs() on 64-bit environments,
-    // thus making the "number of hot frames to skip" be more predictable, giving more consistent backtraces.
-    // See <rdar://problem/5364825> "stack logging: frames keep getting truncated" for why this is necessary.
-    __asm__ volatile("");
-}