diff options
Diffstat (limited to 'libc/bionic/sys_thread_properties.cpp')
| -rw-r--r-- | libc/bionic/sys_thread_properties.cpp | 152 |
1 files changed, 0 insertions, 152 deletions
diff --git a/libc/bionic/sys_thread_properties.cpp b/libc/bionic/sys_thread_properties.cpp deleted file mode 100644 index d1a73b7f9..000000000 --- a/libc/bionic/sys_thread_properties.cpp +++ /dev/null @@ -1,152 +0,0 @@ -/* - * Copyright (C) 2020 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. - */ - -#include <sys/thread_properties.h> - -#include <async_safe/CHECK.h> -#include <async_safe/log.h> - -#include <elf.h> -#include <pthread.h> -#include <unistd.h> - -#include <sys/ptrace.h> -#include <sys/uio.h> -#include <sys/user.h> - -#if defined(__i386__) -#include <asm/ldt.h> -#endif - -#include "private/ErrnoRestorer.h" -#include "private/bionic_elf_tls.h" -#include "private/bionic_globals.h" -#include "private/bionic_tls.h" -#include "pthread_internal.h" - -void __libc_get_static_tls_bounds(void** stls_begin, void** stls_end) { - const StaticTlsLayout& layout = __libc_shared_globals()->static_tls_layout; - *stls_begin = reinterpret_cast<char*>(__get_bionic_tcb()) - layout.offset_bionic_tcb(); - *stls_end = reinterpret_cast<char*>(*stls_begin) + layout.size(); -} - -void __libc_register_thread_exit_callback(thread_exit_cb_t cb) { - TlsModules& modules = __libc_shared_globals()->tls_modules; - - if (modules.first_thread_exit_callback == nullptr) { - modules.first_thread_exit_callback = cb; - return; - }; - - BionicAllocator& allocator = __libc_shared_globals()->tls_allocator; - CallbackHolder* new_node = - reinterpret_cast<CallbackHolder*>(allocator.alloc(sizeof(CallbackHolder))); - new_node->cb = cb; - new_node->prev = modules.thread_exit_callback_tail_node; - modules.thread_exit_callback_tail_node = new_node; -} - -static inline __always_inline bionic_tcb* __get_bionic_tcb_for_thread(pid_t tid) { - // If tid is same as self, then we don't need ptrace. - if (gettid() == tid) return __get_bionic_tcb(); - - // Find the thread-pointer register for the given thread. - void** tp_reg = nullptr; -#if defined(__x86_64__) - { - ErrnoRestorer errno_restorer; - errno = 0; - uintptr_t fs_base = ptrace(PTRACE_PEEKUSER, tid, offsetof(user_regs_struct, fs_base), nullptr); - if (errno == 0) { - tp_reg = reinterpret_cast<void**>(fs_base); - } - } -#elif defined(__i386__) - struct user_regs_struct regs; - struct iovec pt_iov = { - .iov_base = ®s, - .iov_len = sizeof(regs), - }; - - if (ptrace(PTRACE_GETREGSET, tid, NT_PRSTATUS, &pt_iov) == 0) { - struct user_desc u_info; - u_info.entry_number = regs.xgs >> 3; - if (ptrace(PTRACE_GET_THREAD_AREA, tid, u_info.entry_number, &u_info) == 0) { - tp_reg = reinterpret_cast<void**>(u_info.base_addr); - } - } -#elif defined(__aarch64__) - uint64_t reg; - struct iovec pt_iov { - .iov_base = ®, .iov_len = sizeof(reg), - }; - - if (ptrace(PTRACE_GETREGSET, tid, NT_ARM_TLS, &pt_iov) == 0) { - tp_reg = reinterpret_cast<void**>(reg); - } -#elif defined(__arm__) - if (ptrace(PTRACE_GET_THREAD_AREA, tid, nullptr, &tp_reg) != 0) { - // Reset the tp_reg if ptrace was unsuccessful. - tp_reg = nullptr; - } -#endif - - if (tp_reg == nullptr) { - async_safe_write_log(ANDROID_LOG_FATAL, "libc", - "__get_bionic_tcb_for_thread failed to read thread register."); - } - - return reinterpret_cast<bionic_tcb*>(&tp_reg[MIN_TLS_SLOT]); -} - -void __libc_iterate_dynamic_tls(pid_t tid, - void (*cb)(void* __dynamic_tls_begin, void* __dynamic_tls_end, - size_t __dso_id, void* __arg), - void* arg) { - TlsModules& modules = __libc_shared_globals()->tls_modules; - bionic_tcb* const tcb = __get_bionic_tcb_for_thread(tid); - TlsDtv* const dtv = __get_tcb_dtv(tcb); - BionicAllocator& allocator = __libc_shared_globals()->tls_allocator; - - for (size_t i = modules.static_module_count; i < dtv->count; ++i) { - void* dtls_begin = dtv->modules[i]; - if (dtls_begin == nullptr) continue; - void* dtls_end = - static_cast<void*>(static_cast<char*>(dtls_begin) + allocator.get_chunk_size(dtls_begin)); - size_t dso_id = __tls_module_idx_to_id(i); - - cb(dtls_begin, dtls_end, dso_id, arg); - } -} - -void __libc_register_dynamic_tls_listeners(dtls_listener_t on_creation, - dtls_listener_t on_destruction) { - TlsModules& tls_modules = __libc_shared_globals()->tls_modules; - tls_modules.on_creation_cb = on_creation; - tls_modules.on_destruction_cb = on_destruction; -} |