Something went wrong. Try again.
Cider Isn't Darwin Emulation, Really
Something went wrong. Try again.
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112/* * 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>#include "stack_logging.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; }}
voidthread_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("");}