| /* |
| * 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. |
| */ |
| |
| #pragma once |
| |
| #include <locale.h> |
| #include <mntent.h> |
| #include <stdio.h> |
| #include <sys/cdefs.h> |
| #include <sys/param.h> |
| |
| #include "bionic_asm_tls.h" |
| #include "bionic_macros.h" |
| #include "__get_tls.h" |
| #include "grp_pwd.h" |
| |
| /** 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). |
| **/ |
| |
| class pthread_internal_t; |
| |
| // This struct is small, so the linker can allocate a temporary copy on its |
| // stack. It can't be combined with pthread_internal_t because: |
| // - native bridge requires pthread_internal_t to have the same layout across |
| // architectures, and |
| // - On x86, this struct would have to be placed at the front of |
| // pthread_internal_t, moving fields like `tid`. |
| // - We'd like to avoid having a temporary pthread_internal_t object that |
| // needs to be transferred once the final size of static TLS is known. |
| struct bionic_tcb { |
| void* raw_slots_storage[BIONIC_TLS_SLOTS]; |
| |
| // Return a reference to a slot given its TP-relative TLS_SLOT_xxx index. |
| // The thread pointer (i.e. __get_tls()) points at &tls_slot(0). |
| void*& tls_slot(size_t tpindex) { |
| return raw_slots_storage[tpindex - MIN_TLS_SLOT]; |
| } |
| |
| // Initialize the main thread's final object using its bootstrap object. |
| void copy_from_bootstrap(const bionic_tcb* boot) { |
| // Copy everything. Problematic slots will be reinitialized. |
| *this = *boot; |
| } |
| |
| pthread_internal_t* thread() { |
| return static_cast<pthread_internal_t*>(tls_slot(TLS_SLOT_THREAD_ID)); |
| } |
| }; |
| |
| /* |
| * 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: |
| * _res_key libc (constructor in BSD code) |
| */ |
| |
| #define LIBC_PTHREAD_KEY_RESERVED_COUNT 1 |
| |
| /* Internally, jemalloc uses a single key for per thread data. */ |
| #define JEMALLOC_PTHREAD_KEY_RESERVED_COUNT 1 |
| #define BIONIC_PTHREAD_KEY_RESERVED_COUNT (LIBC_PTHREAD_KEY_RESERVED_COUNT + JEMALLOC_PTHREAD_KEY_RESERVED_COUNT) |
| |
| /* |
| * 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) |
| |
| class pthread_key_data_t { |
| public: |
| uintptr_t seq; // Use uintptr_t just for alignment, as we use pointer below. |
| void* data; |
| }; |
| |
| // ~3 pages. This struct is allocated as static TLS memory (i.e. at a fixed |
| // offset from the thread pointer). |
| struct bionic_tls { |
| pthread_key_data_t key_data[BIONIC_PTHREAD_KEY_COUNT]; |
| |
| locale_t locale; |
| |
| char basename_buf[MAXPATHLEN]; |
| char dirname_buf[MAXPATHLEN]; |
| |
| mntent mntent_buf; |
| char mntent_strings[BUFSIZ]; |
| |
| char ptsname_buf[32]; |
| char ttyname_buf[64]; |
| |
| char strerror_buf[NL_TEXTMAX]; |
| char strsignal_buf[NL_TEXTMAX]; |
| |
| group_state_t group; |
| passwd_state_t passwd; |
| |
| // Initialize the main thread's final object using its bootstrap object. |
| void copy_from_bootstrap(const bionic_tls* boot __attribute__((unused))) { |
| // Nothing in bionic_tls needs to be preserved in the transition to the |
| // final TLS objects, so don't copy anything. |
| } |
| }; |
| |
| class KernelArgumentBlock; |
| extern "C" void __libc_init_main_thread_early(const KernelArgumentBlock& args, bionic_tcb* temp_tcb); |
| extern "C" void __libc_init_main_thread_late(); |
| extern "C" void __libc_init_main_thread_final(); |