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/*
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*
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* main.cpp
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* Stub main() routine for the openGauss executable.
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*
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* This does some essential startup tasks for any incarnation of openGauss
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* (postmaster, standalone backend, standalone bootstrap process, or a
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* separately exec'd child of a postmaster) and then dispatches to the
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* proper FooMain() routine for the incarnation.
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*
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*
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* Portions Copyright (c) 2020 Huawei Technologies Co.,Ltd.
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* Portions Copyright (c) 1996-2012, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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*
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* IDENTIFICATION
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* src/gausskernel/process/main/main.cpp
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*
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* -------------------------------------------------------------------------
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*/
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#include "postgres.h"
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#include "knl/knl_variable.h"
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#include <pwd.h>
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#include <unistd.h>
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#if defined(__alpha) && defined(__osf__) /* no __alpha__ ? */
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#include <sys/sysinfo.h>
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#include "machine/hal_sysinfo.h"
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#define ASSEMBLER
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#include <sys/proc.h>
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#undef ASSEMBLER
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#endif
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#if defined(__NetBSD__)
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#include <sys/param.h>
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#endif
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#include "bootstrap/bootstrap.h"
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#include "postmaster/postmaster.h"
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#include "miscadmin.h"
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#include "storage/ipc.h"
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#include "tcop/tcopprot.h"
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#include "utils/fmgrtab.h"
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#include "utils/help_config.h"
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#include "utils/pg_locale.h"
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#include "utils/ps_status.h"
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#ifdef WIN32
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#include "libpq/pqsignal.h"
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#endif
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#include "utils/syscall_lock.h"
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#include "gssignal/gs_signal.h"
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#include "utils/memutils.h"
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#include "utils/mmpool.h"
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#include "utils/plog.h"
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#include "gstrace/gstrace_infra.h"
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THR_LOCAL bool IsInitdb = false;
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size_t mmap_threshold = (size_t)0xffffffff;
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const char* progname = NULL;
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static void startup_hacks(const char* progname);
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static void help(const char* progname);
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static void check_root(const char* progname);
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static char* get_current_username(const char* progname);
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static void syscall_lock_init(void);
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extern int encrypte_main(int argc, char* const argv[]);
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/*
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* Any openGauss server process begins execution here.
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*/
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int main(int argc, char* argv[])
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{
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char* mmap_env = NULL;
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syscall_lock_init();
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// 从环境变量中获取GAUSS_MMAP_THRESHOLD的值，并设置mmap_threshold变量
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mmap_env = gs_getenv_r("GAUSS_MMAP_THRESHOLD");
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if (mmap_env != NULL) {
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check_backend_env(mmap_env);
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mmap_threshold = (size_t)atol(mmap_env);
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}
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// 初始化KNL实例
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knl_instance_init();
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// 创建增量检查点上下文
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g_instance.increCheckPoint_context = AllocSetContextCreate(
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INSTANCE_GET_MEM_CXT_GROUP(MEMORY_CONTEXT_STORAGE),
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"IncreCheckPointContext",
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ALLOCSET_DEFAULT_MINSIZE,
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ALLOCSET_DEFAULT_INITSIZE,
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ALLOCSET_DEFAULT_MAXSIZE,
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SHARED_CONTEXT);
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// 创建备机帐号上下文
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g_instance.account_context = AllocSetContextCreate(g_instance.instance_context,
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"StandbyAccontContext",
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ALLOCSET_DEFAULT_MINSIZE,
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ALLOCSET_DEFAULT_INITSIZE,
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ALLOCSET_DEFAULT_MAXSIZE,
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SHARED_CONTEXT);
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// 创建通信全局内存上下文
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g_instance.comm_cxt.comm_global_mem_cxt = AllocSetContextCreate(g_instance.instance_context,
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"CommunnicatorGlobalMemoryContext",
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ALLOCSET_DEFAULT_MINSIZE,
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ALLOCSET_DEFAULT_INITSIZE,
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ALLOCSET_DEFAULT_MAXSIZE,
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SHARED_CONTEXT);
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// 创建内置过程内存上下文
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g_instance.builtin_proc_context = AllocSetContextCreate(g_instance.instance_context,
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"builtin_procGlobalMemoryContext",
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ALLOCSET_DEFAULT_MINSIZE,
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ALLOCSET_DEFAULT_INITSIZE,
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ALLOCSET_DEFAULT_MAXSIZE,
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SHARED_CONTEXT);
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/*
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* Fire up essential subsystems: error and memory management
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*
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* Code after this point is allowed to use elog/ereport, though
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* localization of messages may not work right away, and messages won't go
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* anywhere but stderr until GUC settings get loaded.
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*/
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// 初始化内存上下文
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MemoryContextInit();
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// 设置全局变量PmTopMemoryContext为顶层内存上下文
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PmTopMemoryContext = t_thrd.top_mem_cxt;
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// 初始化线程
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knl_thread_init(MASTER_THREAD);
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// 创建虚拟会话
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t_thrd.fake_session = create_session_context(t_thrd.top_mem_cxt, 0);
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t_thrd.fake_session->status = KNL_SESS_FAKE;
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// 将当前会话设置为虚拟会话
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u_sess = t_thrd.fake_session;
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// 设置SelfMemoryContext为默认内存上下文组
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SelfMemoryContext = THREAD_GET_MEM_CXT_GROUP(MEMORY_CONTEXT_DEFAULT);
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// 切换到默认内存上下文组
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MemoryContextSwitchTo(THREAD_GET_MEM_CXT_GROUP(MEMORY_CONTEXT_DEFAULT));
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// 获取程序名称
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progname = get_progname(argv[0]);
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/*
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* Platform-specific startup hacks
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*/
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startup_hacks(progname);
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/* if gaussdb's name is gs_encrypt, so run in encrypte_main() */
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if (!strcmp(progname, "gs_encrypt")) {
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return encrypte_main(argc, argv);
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}
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// 初始化plog全局内存
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init_plog_global_mem();
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/*
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* Remember the physical location of the initially given argv[] array for
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* possible use by ps display. On some platforms, the argv[] storage must
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* be overwritten in order to set the process title for ps. In such cases,
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* save_ps_display_args makes and returns a new copy of the argv[] array.
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*
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* save_ps_display_args may also move the environment strings to make
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* extra room. Therefore this should be done as early as possible during
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* startup, to avoid entanglements with code that might save a getenv()
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* result pointer.
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*/
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argv = save_ps_display_args(argc, argv);
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/*
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* If supported on the current platform, set up a handler to be called if
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* the backend/postmaster crashes with a fatal signal or exception.
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*/
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#if defined(WIN32) && defined(HAVE_MINIDUMP_TYPE)
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pgwin32_install_crashdump_handler();
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#endif
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/*
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* Set up locale information from environment. Note that LC_CTYPE and
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* LC_COLLATE will be overridden later from pg_control if we are in an
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* already-initialized database. We set them here so that they will be
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* available to fill pg_control during initdb. LC_MESSAGES will get set
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* later during GUC option processing, but we set it here to allow startup
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* error messages to be localized.
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*/
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set_pglocale_pgservice(argv[0], PG_TEXTDOMAIN("gaussdb"));
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#ifdef WIN32
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/*
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* Windows uses codepages rather than the environment, so we work around
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* that by querying the environment explicitly first for LC_COLLATE and
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* LC_CTYPE. We have to do this because initdb passes those values in the
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* environment. If there is nothing there we fall back on the codepage.
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*/
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{
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char* env_locale = NULL;
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if ((env_locale = gs_getenv_r("LC_COLLATE")) != NULL) {
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check_backend_env(env_locale);
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pg_perm_setlocale(LC_COLLATE, env_locale);
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} else
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pg_perm_setlocale(LC_COLLATE, "");
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if ((env_locale = gs_getenv_r("LC_CTYPE")) != NULL) {
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check_backend_env(env_locale);
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pg_perm_setlocale(LC_CTYPE, env_locale);
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} else
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pg_perm_setlocale(LC_CTYPE, "");
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}
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#else
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pg_perm_setlocale(LC_COLLATE, "");
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pg_perm_setlocale(LC_CTYPE, "");
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#endif
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/*
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* We keep these set to "C" always, except transiently in pg_locale.c; see
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* that file for explanations.
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*/
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pg_perm_setlocale(LC_MONETARY, "C"); // 将货币格式化设置为"C"语言环境
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pg_perm_setlocale(LC_NUMERIC, "C"); // 将数字格式化设置为"C"语言环境
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pg_perm_setlocale(LC_TIME, "C"); // 将时间格式化设置为"C"语言环境
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/*
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* Now that we have absorbed as much as we wish to from the locale
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* environment, remove any LC_ALL setting, so that the environment
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* variables installed by pg_perm_setlocale have force.
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*/
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(void)unsetenv("LC_ALL"); // 移除LC_ALL设置，以确保pg_perm_setlocale设置的环境变量生效
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/*
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* Catch standard options before doing much else
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*/
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if (argc > 1) {
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if (strcmp(argv[1], "--help") == 0 || strcmp(argv[1], "-?") == 0) {
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help(progname); // 显示帮助信息
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exit(0);
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}
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if (strcmp(argv[1], "--version") == 0 || strcmp(argv[1], "-V") == 0) {
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puts("gaussdb " DEF_GS_VERSION); // 显示版本号
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exit(0);
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}
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}
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/*
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* Make sure we are not running as root.
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*/
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check_root(progname); // 检查是否以root用户身份运行
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/*
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* Dispatch to one of various subprograms depending on first argument.
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*/
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#ifdef WIN32
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/*
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* Start our win32 signal implementation
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*
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* SubPostmasterMain() will do this for itself, but the remaining modes
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* need it here
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*/
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pgwin32_signal_initialize(); // 在Windows平台上启动信号处理
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#endif
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t_thrd.mem_cxt.gs_signal_mem_cxt = AllocSetContextCreate(
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t_thrd.top_mem_cxt, "gs_signal", ALLOCSET_DEFAULT_MINSIZE, ALLOCSET_DEFAULT_INITSIZE, ALLOCSET_DEFAULT_MAXSIZE);
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if (NULL == t_thrd.mem_cxt.gs_signal_mem_cxt) {
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ereport(LOG, (errmsg("could not start a new thread, because of no enough system resource. ")));
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proc_exit(1);
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}
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/*
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* @BuiltinFunc
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* Create a global BuiltinFunc object shared among threads
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*/
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if (g_sorted_funcs[0] == NULL) {
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initBuiltinFuncs(); // 初始化内置函数相关的全局变量
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}
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bool isBoot = (argc > 1 && strcmp(argv[1], "--boot") == 0);
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if (isBoot) {
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IsInitdb = true;
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gs_signal_monitor_startup(); // 启动信号监控工作线程
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gs_signal_slots_init(1); // 初始化信号插槽
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(void)gs_signal_unblock_sigusr2(); // 解除SIGUSR2信号的阻塞
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gs_signal_startup_siginfo("AuxiliaryProcessMain"); // 记录启动信息
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BootStrapProcessMain(argc, argv); /* does not return */
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}
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if (argc > 1 && strcmp(argv[1], "--describe-config") == 0)
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exit(GucInfoMain()); // 打印GUC参数信息
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if (argc > 1 && strcmp(argv[1], "--single") == 0) {
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IsInitdb = true;
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gs_signal_monitor_startup(); // 启动信号监控工作线程
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gs_signal_slots_init(1); // 初始化信号插槽
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(void)gs_signal_unblock_sigusr2(); // 解除SIGUSR2信号的阻塞
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gs_signal_startup_siginfo("PostgresMain"); // 记录启动信息
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exit(PostgresMain(argc, argv, NULL, get_current_username(progname))); // 进入PostgreSQL主循环
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}
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exit(PostmasterMain(argc, argv)); // 进入Postmaster主循环
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/*
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* Place platform-specific startup hacks here. This is the right
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* place to put code that must be executed early in the launch of any new
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* server process. Note that this code will NOT be executed when a backend
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* or sub-bootstrap process is forked, unless we are in a fork/exec
|
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* environment (ie EXEC_BACKEND is defined).
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*
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* XXX The need for code here is proof that the platform in question
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||||||
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* is too brain-dead to provide a standard C execution environment
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* without help. Avoid adding more here, if you can.
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*/
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static void startup_hacks(const char* progname)
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{
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/*
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* On some platforms, unaligned memory accesses result in a kernel trap;
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* the default kernel behavior is to emulate the memory access, but this
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* results in a significant performance penalty. We want PG never to make
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* such unaligned memory accesses, so this code disables the kernel
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* emulation: unaligned accesses will result in SIGBUS instead.
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*/
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#ifdef NOFIXADE
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#if defined(__alpha) /* no __alpha__ ? */
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||||||
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{
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||||||
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int buffer[] = {SSIN_UACPROC, UAC_SIGBUS | UAC_NOPRINT};
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||||||
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if (setsysinfo(SSI_NVPAIRS, buffer, 1, (caddr_t)NULL, (unsigned long)NULL) < 0)
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||||||
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write_stderr("%s: setsysinfo failed: %s\n", progname, gs_strerror(errno));
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||||||
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}
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#endif /* __alpha */
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||||||
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#endif /* NOFIXADE */
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||||||
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|
||||||
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/*
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||||||
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* Windows-specific execution environment hacking.
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||||||
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*/
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||||||
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#ifdef WIN32
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||||||
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{
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||||||
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WSADATA wsaData;
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||||||
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int err;
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||||||
|
|
||||||
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/* Make output streams unbuffered by default */
|
||||||
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setvbuf(stdout, NULL, _IONBF, 0);
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setvbuf(stderr, NULL, _IONBF, 0);
|
||||||
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|
||||||
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/* Prepare Winsock */
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||||||
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err = WSAStartup(MAKEWORD(2, 2), &wsaData);
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||||||
|
if (err != 0) {
|
||||||
|
write_stderr("%s: WSAStartup failed: %d\n", progname, err);
|
||||||
|
exit(1);
|
||||||
|
}
|
||||||
|
|
||||||
|
/* In case of general protection fault, don't show GUI popup box */
|
||||||
|
SetErrorMode(SEM_FAILCRITICALERRORS | SEM_NOGPFAULTERRORBOX);
|
||||||
|
}
|
||||||
|
#endif /* WIN32 */
|
||||||
|
|
||||||
|
/* Binding static TLS variables for current thread */
|
||||||
|
EarlyBindingTLSVariables();
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Help display should match the options accepted by PostmasterMain()
|
||||||
|
* and PostgresMain().
|
||||||
|
*/
|
||||||
|
static void help(const char* progname)
|
||||||
|
{
|
||||||
|
printf(_("%s is the gaussdb server.\n\n"), progname);
|
||||||
|
printf(_("Usage:\n %s [OPTION]...\n\n"), progname);
|
||||||
|
printf(_("Options:\n"));
|
||||||
|
#ifdef USE_ASSERT_CHECKING
|
||||||
|
printf(_(" -A 1|0 enable/disable run-time assert checking\n"));
|
||||||
|
#endif
|
||||||
|
printf(_(" -B NBUFFERS number of shared buffers\n"));
|
||||||
|
printf(_(" -b BINARY UPGRADES flag used for binary upgrades\n"));
|
||||||
|
printf(_(" -c NAME=VALUE set run-time parameter\n"));
|
||||||
|
printf(_(" -C NAME print value of run-time parameter, then exit\n"));
|
||||||
|
printf(_(" -d 1-5 debugging level\n"));
|
||||||
|
printf(_(" -D DATADIR database directory\n"));
|
||||||
|
printf(_(" -e use European date input format (DMY)\n"));
|
||||||
|
printf(_(" -F turn fsync off\n"));
|
||||||
|
printf(_(" -h HOSTNAME host name or IP address to listen on\n"));
|
||||||
|
printf(_(" -i enable TCP/IP connections\n"));
|
||||||
|
printf(_(" -k DIRECTORY Unix-domain socket location\n"));
|
||||||
|
#ifdef USE_SSL
|
||||||
|
printf(_(" -l enable SSL connections\n"));
|
||||||
|
#endif
|
||||||
|
printf(_(" -N MAX-CONNECT maximum number of allowed connections\n"));
|
||||||
|
printf(_(" -M SERVERMODE the database start as the appointed server mode\n"));
|
||||||
|
|
||||||
|
printf(_(" -o OPTIONS pass \"OPTIONS\" to each server process (obsolete)\n"));
|
||||||
|
printf(_(" -p PORT port number to listen on\n"));
|
||||||
|
#ifdef ENABLE_MULTIPLE_NODES
|
||||||
|
printf(_(" -R indicate run as xlogreiver.Only used with -M standby\n"));
|
||||||
|
#endif
|
||||||
|
printf(_(" -s show statistics after each query\n"));
|
||||||
|
printf(_(" -S WORK-MEM set amount of memory for sorts (in kB)\n"));
|
||||||
|
printf(_(" -u NUM set the num of kernel version before upgrade\n"));
|
||||||
|
printf(_(" -V, --version output version information, then exit\n"));
|
||||||
|
printf(_(" --NAME=VALUE set run-time parameter\n"));
|
||||||
|
printf(_(" --describe-config describe configuration parameters, then exit\n"));
|
||||||
|
printf(_(" --securitymode allow database system run in security mode\n"));
|
||||||
|
printf(_(" --single_node A SingleDN mode is being activated\n"));
|
||||||
|
printf(_(" -?, --help show this help, then exit\n"));
|
||||||
|
|
||||||
|
printf(_("\nServer mode:\n"));
|
||||||
|
printf(_(" primary database system starts as a primary server, send xlog to standby server\n"));
|
||||||
|
printf(_(" standby database system starts as a standby server, receive xlog from primary server\n"));
|
||||||
|
printf(_(" pending database system starts as a pending server, wait for promoting to primary or "
|
||||||
|
"demoting to standby\n"));
|
||||||
|
#ifdef ENABLE_MULTIPLE_NODES
|
||||||
|
printf(_(" fenced database system starts a fenced master process, serve UDF execution in secure mode "
|
||||||
|
"(run separately from Gaussdb process)\n"));
|
||||||
|
#endif
|
||||||
|
|
||||||
|
printf(_("\nDeveloper options:\n"));
|
||||||
|
printf(_(" -f s|i|n|m|h forbid use of some plan types\n"));
|
||||||
|
printf(_(" -n do not reinitialize shared memory after abnormal exit\n"));
|
||||||
|
printf(_(" -O allow system table structure changes\n"));
|
||||||
|
printf(_(" -P disable system indexes\n"));
|
||||||
|
printf(_(" -t pa|pl|ex show timings after each query\n"));
|
||||||
|
printf(_(" -T send SIGSTOP to all backend processes if one dies\n"));
|
||||||
|
printf(_(" -W NUM wait NUM seconds to allow attach from a debugger\n"));
|
||||||
|
printf(_(" --localxid use local transaction id (used only by gs_initdb)\n"));
|
||||||
|
|
||||||
|
printf(_("\nOptions for single-user mode:\n"));
|
||||||
|
printf(_(" --single selects single-user mode (must be first argument)\n"));
|
||||||
|
printf(_(" DBNAME database name (defaults to user name)\n"));
|
||||||
|
printf(_(" -d 0-5 override debugging level\n"));
|
||||||
|
printf(_(" -E echo statement before execution\n"));
|
||||||
|
printf(_(" -j do not use newline as interactive query delimiter\n"));
|
||||||
|
printf(_(" -r FILENAME send stdout and stderr to given file\n"));
|
||||||
|
|
||||||
|
printf(_("\nOptions for bootstrapping mode:\n"));
|
||||||
|
printf(_(" --boot selects bootstrapping mode (must be first argument)\n"));
|
||||||
|
#ifdef ENABLE_MULTIPLE_NODES
|
||||||
|
printf(_(" DBNAME database name (mandatory argument in bootstrapping mode)\n"));
|
||||||
|
#endif
|
||||||
|
printf(_(" -r FILENAME send stdout and stderr to given file\n"));
|
||||||
|
printf(_(" -x NUM internal use\n"));
|
||||||
|
|
||||||
|
#ifdef ENABLE_MULTIPLE_NODES
|
||||||
|
printf(_("\nNode options:\n"));
|
||||||
|
#ifdef ENABLE_MULTIPLE_NODES
|
||||||
|
printf(_(" --coordinator start as a Coordinator\n"));
|
||||||
|
printf(_(" --datanode start as a Datanode\n"));
|
||||||
|
#endif
|
||||||
|
printf(_(" --restoremode start to restore existing schema on the new node to be added\n"));
|
||||||
|
printf(_(" --single_node start as single node\n"));
|
||||||
|
#else
|
||||||
|
printf(_("\nNode options:\n"));
|
||||||
|
printf(_(" --single_node start a single node database. This is default setting.\n"));
|
||||||
|
#endif
|
||||||
|
|
||||||
|
printf(_("\nPlease read the documentation for the complete list of run-time\n"
|
||||||
|
"configuration settings and how to set them on the command line or in\n"
|
||||||
|
"the configuration file.\n"));
|
||||||
|
#if ((defined(ENABLE_MULTIPLE_NODES)) || (defined(ENABLE_PRIVATEGAUSS)))
|
||||||
|
printf(_("\nReport bugs to GaussDB support.\n"));
|
||||||
|
#else
|
||||||
|
printf(_("\nReport bugs to openGauss community by raising an issue.\n"));
|
||||||
|
#endif
|
||||||
|
}
|
||||||
|
|
||||||
|
static void check_root(const char* progname)
|
||||||
|
{
|
||||||
|
#ifndef WIN32
|
||||||
|
if (geteuid() == 0) {
|
||||||
|
write_stderr("\"root\" execution of the gaussdb server is not permitted.\n"
|
||||||
|
"The server must be started under an unprivileged user ID to prevent\n"
|
||||||
|
"possible system security compromise. See the documentation for\n"
|
||||||
|
"more information on how to properly start the server.\n");
|
||||||
|
exit(1);
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Also make sure that real and effective uids are the same. Executing as
|
||||||
|
* a setuid program from a root shell is a security hole, since on many
|
||||||
|
* platforms a nefarious subroutine could setuid back to root if real uid
|
||||||
|
* is root. (Since nobody actually uses postgres as a setuid program,
|
||||||
|
* trying to actively fix this situation seems more trouble than it's
|
||||||
|
* worth; we'll just expend the effort to check for it.)
|
||||||
|
*/
|
||||||
|
if (getuid() != geteuid()) {
|
||||||
|
write_stderr("%s: real and effective user IDs must match\n", progname);
|
||||||
|
exit(1);
|
||||||
|
}
|
||||||
|
#else /* WIN32 */
|
||||||
|
if (pgwin32_is_admin()) {
|
||||||
|
write_stderr("Execution of gaussdb by a user with administrative permissions is not\n"
|
||||||
|
"permitted.\n"
|
||||||
|
"The server must be started under an unprivileged user ID to prevent\n"
|
||||||
|
"possible system security compromises. See the documentation for\n"
|
||||||
|
"more information on how to properly start the server.\n");
|
||||||
|
exit(1);
|
||||||
|
}
|
||||||
|
#endif /* WIN32 */
|
||||||
|
}
|
||||||
|
/**
|
||||||
|
* get_current_username - 获取当前操作系统的用户名
|
||||||
|
* @progname: 程序名称
|
||||||
|
*
|
||||||
|
* 返回当前操作系统的用户名。
|
||||||
|
*/
|
||||||
|
static char* get_current_username(const char* progname)
|
||||||
|
{
|
||||||
|
#ifndef WIN32 // 非Windows平台代码
|
||||||
|
struct passwd* pw = NULL;
|
||||||
|
char* pRet = NULL;
|
||||||
|
|
||||||
|
(void)syscalllockAcquire(&getpwuid_lock); // 获取线程锁
|
||||||
|
pw = getpwuid(geteuid()); // 获取与实际用户ID关联的密码记录
|
||||||
|
if (pw == NULL) { // 如果无法获取则报错
|
||||||
|
(void)syscalllockRelease(&getpwuid_lock);
|
||||||
|
write_stderr("%s: invalid effective UID: %d\n", progname, (int)geteuid());
|
||||||
|
exit(1);
|
||||||
|
}
|
||||||
|
/* Allocate new memory because later getpwuid() calls can overwrite it. */
|
||||||
|
pRet = MemoryContextStrdup(SESS_GET_MEM_CXT_GROUP(MEMORY_CONTEXT_CBB), pw->pw_name); // 分配新内存来储存用户名，并返回该内存地址
|
||||||
|
(void)syscalllockRelease(&getpwuid_lock); // 释放线程锁
|
||||||
|
return pRet; // 返回用户名
|
||||||
|
#else // Windows平台代码
|
||||||
|
unsigned long namesize = 256 /* UNLEN */ + 1;
|
||||||
|
char* name = NULL;
|
||||||
|
|
||||||
|
name = MemoryContextAlloc(
|
||||||
|
SESS_GET_MEM_CXT_GROUP(MEMORY_CONTEXT_CBB), namesize); // 分配内存来储存用户名，返回该内存地址
|
||||||
|
if (!GetUserName(name, &namesize)) { // 获取当前用户的用户名
|
||||||
|
write_stderr("%s: could not determine user name (GetUserName failed)\n", progname);
|
||||||
|
exit(1);
|
||||||
|
}
|
||||||
|
|
||||||
|
return name; // 返回用户名
|
||||||
|
#endif
|
||||||
|
}
|
||||||
|
|
||||||
|
/**
|
||||||
|
* syscall_lock_init - 初始化系统调用锁
|
||||||
|
*
|
||||||
|
* 初始化用于保护某些系统调用（如 getenv）的线程锁。
|
||||||
|
*/
|
||||||
|
static void syscall_lock_init(void)
|
||||||
|
{
|
||||||
|
syscalllockInit(&getpwuid_lock); // 初始化获取用户ID对应密码记录的线程锁
|
||||||
|
syscalllockInit(&env_lock); // 初始化 getenv 的线程锁
|
||||||
|
syscalllockInit(&dlerror_lock); // 初始化 dlerror 的线程锁
|
||||||
|
syscalllockInit(&kerberos_conn_lock); // 初始化 Kerberos 连接相关的线程锁
|
||||||
|
syscalllockInit(&read_cipher_lock); // 初始化加密算法相关的线程锁
|
||||||
|
}
|
||||||
|
|
||||||
Loading…
Reference in New Issue