127 lines
4.7 KiB
C++
127 lines
4.7 KiB
C++
/*
|
|
* Copyright (C) 2008 The Android Open Source Project
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* * Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* * Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in
|
|
* the documentation and/or other materials provided with the
|
|
* distribution.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
|
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
|
|
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
|
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
|
|
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
|
|
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
|
|
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
|
|
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
#ifndef __BIONIC_PRIVATE_BIONIC_TLS_H_
|
|
#define __BIONIC_PRIVATE_BIONIC_TLS_H_
|
|
|
|
#include <sys/cdefs.h>
|
|
#include <sys/limits.h>
|
|
#include "bionic_macros.h"
|
|
#include "__get_tls.h"
|
|
|
|
__BEGIN_DECLS
|
|
|
|
/** WARNING WARNING WARNING
|
|
**
|
|
** This header file is *NOT* part of the public Bionic ABI/API
|
|
** and should not be used/included by user-serviceable parts of
|
|
** the system (e.g. applications).
|
|
**
|
|
** It is only provided here for the benefit of the system dynamic
|
|
** linker and the OpenGL sub-system (which needs to access the
|
|
** pre-allocated slot directly for performance reason).
|
|
**/
|
|
|
|
// Well-known TLS slots. What data goes in which slot is arbitrary unless otherwise noted.
|
|
enum {
|
|
TLS_SLOT_SELF = 0, // The kernel requires this specific slot for x86.
|
|
TLS_SLOT_THREAD_ID,
|
|
TLS_SLOT_ERRNO,
|
|
|
|
// These two aren't used by bionic itself, but allow the graphics code to
|
|
// access TLS directly rather than using the pthread API.
|
|
TLS_SLOT_OPENGL_API = 3,
|
|
TLS_SLOT_OPENGL = 4,
|
|
|
|
// This slot is only used to pass information from the dynamic linker to
|
|
// libc.so when the C library is loaded in to memory. The C runtime init
|
|
// function will then clear it. Since its use is extremely temporary,
|
|
// we reuse an existing location that isn't needed during libc startup.
|
|
TLS_SLOT_BIONIC_PREINIT = TLS_SLOT_OPENGL_API,
|
|
|
|
TLS_SLOT_STACK_GUARD = 5, // GCC requires this specific slot for x86.
|
|
TLS_SLOT_DLERROR,
|
|
|
|
BIONIC_TLS_SLOTS // Must come last!
|
|
};
|
|
|
|
/*
|
|
* Bionic uses some pthread keys internally. All pthread keys used internally
|
|
* should be created in constructors, except for keys that may be used in or
|
|
* before constructors.
|
|
*
|
|
* We need to manually maintain the count of pthread keys used internally, but
|
|
* pthread_test should fail if we forget.
|
|
*
|
|
* These are the pthread keys currently used internally by libc:
|
|
*
|
|
* basename libc (ThreadLocalBuffer)
|
|
* dirname libc (ThreadLocalBuffer)
|
|
* uselocale libc (can be used in constructors)
|
|
* getmntent_mntent libc (ThreadLocalBuffer)
|
|
* getmntent_strings libc (ThreadLocalBuffer)
|
|
* ptsname libc (ThreadLocalBuffer)
|
|
* ttyname libc (ThreadLocalBuffer)
|
|
* strerror libc (ThreadLocalBuffer)
|
|
* strsignal libc (ThreadLocalBuffer)
|
|
* passwd libc (ThreadLocalBuffer)
|
|
* group libc (ThreadLocalBuffer)
|
|
* _res_key libc (constructor in BSD code)
|
|
*/
|
|
|
|
#define LIBC_PTHREAD_KEY_RESERVED_COUNT 12
|
|
|
|
#if defined(USE_JEMALLOC)
|
|
/* Following are current pthread keys used internally by jemalloc:
|
|
* je_thread_allocated_tsd jemalloc
|
|
* je_arenas_tsd jemalloc
|
|
* je_tcache_tsd jemalloc
|
|
* je_tcache_enabled_tsd jemalloc
|
|
* je_quarantine_tsd jemalloc
|
|
*/
|
|
#define JEMALLOC_PTHREAD_KEY_RESERVED_COUNT 5
|
|
#define BIONIC_PTHREAD_KEY_RESERVED_COUNT (LIBC_PTHREAD_KEY_RESERVED_COUNT + JEMALLOC_PTHREAD_KEY_RESERVED_COUNT)
|
|
#else
|
|
#define BIONIC_PTHREAD_KEY_RESERVED_COUNT LIBC_PTHREAD_KEY_RESERVED_COUNT
|
|
#endif
|
|
|
|
/*
|
|
* Maximum number of pthread keys allocated.
|
|
* This includes pthread keys used internally and externally.
|
|
*/
|
|
#define BIONIC_PTHREAD_KEY_COUNT (BIONIC_PTHREAD_KEY_RESERVED_COUNT + PTHREAD_KEYS_MAX)
|
|
|
|
__END_DECLS
|
|
|
|
#if defined(__cplusplus)
|
|
class KernelArgumentBlock;
|
|
extern __LIBC_HIDDEN__ void __libc_init_tls(KernelArgumentBlock& args);
|
|
#endif
|
|
|
|
#endif /* __BIONIC_PRIVATE_BIONIC_TLS_H_ */
|