57b7a6110e
On most architectures the kernel subtracts a random offset to the stack pointer in create_elf_tables by calling arch_align_stack before writing the auxval table and so on. On all but x86 this doesn't cause a problem because the random offset is less than a page, but on x86 it's up to two pages. This means that our old technique of rounding the stack pointer doesn't work. (Our old implementation of that technique was wrong too.) It's also incorrect to assume that the main thread's stack base and size are constant. Likewise to assume that the main thread has a guard page. The main thread is not like other threads. This patch switches to reading /proc/self/maps (and checking RLIMIT_STACK) whenever we're asked. Bug: 17111575 Signed-off-by: Fengwei Yin <fengwei.yin@intel.com> Change-Id: I1d4dbffe7bc7bda1d353c3a295dbf68d29f63158
31 lines
993 B
C
31 lines
993 B
C
/*
|
|
* Copyright (C) 2014 The Android Open Source Project
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
#ifndef _BIONIC_STRING_UTILS_H_
|
|
#define _BIONIC_STRING_UTILS_H_
|
|
|
|
#include <string.h>
|
|
|
|
static inline bool ends_with(const char* s1, const char* s2) {
|
|
size_t s1_length = strlen(s1);
|
|
size_t s2_length = strlen(s2);
|
|
if (s2_length > s1_length) {
|
|
return false;
|
|
}
|
|
return memcmp(s1 + (s1_length - s2_length), s2, s2_length) == 0;
|
|
}
|
|
|
|
#endif // _BIONIC_STRING_UTILS_H_
|