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All rights reserved. * * @APPLE_OSREFERENCE_LICENSE_HEADER_START@ * * This file contains Original Code and/or Modifications of Original Code * as defined in and that are subject to the Apple Public Source License * Version 2.0 (the 'License'). You may not use this file except in * compliance with the License. The rights granted to you under the License * may not be used to create, or enable the creation or redistribution of, * unlawful or unlicensed copies of an Apple operating system, or to * circumvent, violate, or enable the circumvention or violation of, any * terms of an Apple operating system software license agreement. * * Please obtain a copy of the License at * http://www.opensource.apple.com/apsl/ and read it before using this file. * * The Original Code and all software distributed under the License are * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT. * Please see the License for the specific language governing rights and * limitations under the License. * * @APPLE_OSREFERENCE_LICENSE_HEADER_END@ */ /* Copyright (c) 1995, 1997 Apple Computer, Inc. All Rights Reserved */ /*- * Copyright (c) 1986, 1989, 1991, 1993 * The Regents of the University of California. All rights reserved. * (c) UNIX System Laboratories, Inc. * All or some portions of this file are derived from material licensed * to the University of California by American Telephone and Telegraph * Co. or Unix System Laboratories, Inc. and are reproduced herein with * the permission of UNIX System Laboratories, Inc. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. 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. * 3. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. Neither the name of the University nor the names of its contributors * may be used to endorse or promote products derived from this software * without specific prior written permission. * * THIS SOFTWARE IS PROVIDED BY THE REGENTS 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 REGENTS 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. * * @(#)proc_internal.h 8.15 (Berkeley) 5/19/95 */ /* * NOTICE: This file was modified by SPARTA, Inc. in 2005 to introduce * support for mandatory and extensible security protections. This notice * is included in support of clause 2.2 (b) of the Apple Public License, * Version 2.0. */ #ifndef _SYS_PROC_INTERNAL_H_ #define _SYS_PROC_INTERNAL_H_ #include <kern/smr.h> #include <kern/kalloc.h> #include <libkern/OSAtomic.h> #include <sys/cdefs.h> #include <sys/filedesc.h> #include <sys/proc.h> #include <sys/proc_ro.h> #include <sys/signalvar.h> #include <mach/resource_monitors.h> // command/proc_name_t __BEGIN_DECLS #include <kern/locks.h> #if PSYNCH #include <kern/thread_call.h> #endif /* PSYNCH */ __END_DECLS #if DEBUG #define __PROC_INTERNAL_DEBUG 1 #endif /* * The short form for various locks that protect fields in the data structures. * PL = Process Lock * PGL = Process Group Lock * PUCL = Process User Credentials Lock * PSL = Process Spin Lock * LL = List Lock * SL = Session Lock * TTYL = TTY Lock * * C = constant/static */ struct label; /* * Flags kept in the low bits of `struct session::s_refcount` */ __options_decl(session_ref_bits_t, uint32_t, { S_DEFAULT = 0x00, S_NOCTTY = 0x01, /* Do not associate controlling tty */ S_CTTYREF = 0x02, /* vnode ref taken by cttyopen */ }); #define SESSION_REF_BITS 4 /* 2 is enough, 4 is easier in hex */ #define SESSION_REF_MASK ((1u << PGRP_REF_BITS) - 1) #define SESSION_NULL ((struct session *)NULL) /*! * @struct session * * @brief * Structure to keep track of process sessions * * @discussion * Sessions hang (with +1's) from: * - process groups (@c pgrp::pg_session) * - ttys (@c tty::t_session) * * Lock ordering: TTYL > LL > SL */ struct session { lck_mtx_t s_mlock; /* session lock */ LIST_ENTRY(session) s_hash; /* (LL) hash linkage */ struct proc *s_leader; /* (C) session leader */ struct vnode *s_ttyvp; /* (SL) Vnode of controlling terminal */ struct tty *s_ttyp; /* (SL) Controlling terminal */ uint32_t s_ttyvid; /* (SL) Vnode id of the controlling terminal */ pid_t s_ttypgrpid; /* (SL) tty's pgrp id */ dev_t _Atomic s_ttydev; /* (SL) tty's device */ pid_t s_sid; /* (C) Session ID */ os_ref_atomic_t s_refcount; char s_login[MAXLOGNAME]; /* (SL) Setlogin() name */ }; /* * Flags for pg_refcnt */ __options_decl(pggrp_ref_bits_t, uint32_t, { PGRP_REF_NONE = 0x00, PGRP_REF_EMPTY = 0x01, /* the process group has no members */ }); #define PGRP_REF_BITS 1 #define PGRP_REF_MASK ((1u << PGRP_REF_BITS) - 1) #define PGRP_NULL ((struct pgrp *)NULL) /*! * @struct pgrp * * @abstract * Describes a process group membership. * * @discussion * <b>locking rules</b> * * Process groups have a static ID (@c pg_id) and session (@c pg_session), * and groups hold a reference on their session. * * Process group membership is protected by the @c pgrp_lock(). * * Lock ordering: TTYL > LL > PGL * * <b>lifetime</b> * Process groups are refcounted, with a packed bit that tracks whether * the group is orphaned (has no members), which prevents it * from being looked up. * * Process groups are retired through @c smr_global_retire(). * * Process groups are hashed in a global hash table that can be consulted * while holding the @c proc_list_lock() with @c pghash_find_locked() * or using hazard pointers with @c pgrp_find(). */ struct pgrp { lck_mtx_t pg_mlock; /* process group lock (PGL) */ struct smrq_slink pg_hash; /* hash chain (PLL) */ LIST_HEAD(, proc) pg_members; /* group members (PGL) */ struct session *pg_session; /* session (static) */ pid_t pg_id; /* group ID (static) */ int pg_jobc; /* # procs qualifying pgrp for job control (PGL) */ os_ref_atomic_t pg_refcount; os_ref_atomic_t pg_hashref; }; __options_decl(proc_ref_bits_t, uint32_t, { P_REF_NONE = 0x00u, P_REF_NEW = 0x01u, /* the proc is being initialized */ P_REF_DEAD = 0x02u, /* the proc is becoming a zombie */ P_REF_WILL_EXEC = 0x04u, /* see proc_refdrain_will_exec() */ P_REF_IN_EXEC = 0x08u, /* see proc_refdrain_will_exec() */ P_REF_DRAINING = 0x10u, /* someone is in proc_refdrain() */ P_REF_SHADOW = 0x20u, /* the proc is shadow proc in exec */ P_REF_PROC_HOLD = 0x40u, /* the proc has ref on the proc task combined struct */ P_REF_TASK_HOLD = 0x80u, /* the task has ref on the proc task combined struct */ }); #define P_REF_BITS 8 #define P_REF_MASK ((1u << P_REF_BITS) - 1) /* * Kernel signal definitions and data structures, * not exported to user programs. */ struct sigacts; /* * Process signal actions and state, needed only within the process * (not necessarily resident). */ struct sigacts { user_addr_t ps_sigact[NSIG]; /* disposition of signals */ user_addr_t ps_trampact[NSIG]; /* disposition of signals */ sigset_t ps_catchmask[NSIG]; /* signals to be blocked */ sigset_t ps_sigonstack; /* signals to take on sigstack */ sigset_t ps_sigintr; /* signals that interrupt syscalls */ sigset_t ps_sigreset; /* signals that reset when caught */ sigset_t ps_signodefer; /* signals not masked while handled */ sigset_t ps_siginfo; /* signals that want SA_SIGINFO args */ sigset_t ps_oldmask; /* saved mask from before sigpause */ _Atomic uint32_t ps_sigreturn_validation; /* sigreturn argument validation state */ int ps_flags; /* signal flags, below */ int ps_sig; /* for core dump/debugger XXX */ int ps_code; /* for core dump/debugger XXX */ int ps_addr; /* for core dump/debugger XXX */ }; #define PROC_NULL ((struct proc *)NULL) /* * Description of a process. * * This structure contains the information needed to manage a thread of * control, known in UN*X as a process; it has references to substructures * containing descriptions of things that the process uses, but may share * with related processes. The process structure and the substructures * are always addressible except for those marked "(PROC ONLY)" below, * which might be addressible only on a processor on which the process * is running. */ struct proc { LIST_ENTRY(proc) p_list; /* List of all processes. */ struct proc * XNU_PTRAUTH_SIGNED_PTR("proc.p_pptr") p_pptr; /* Pointer to parent process.(LL) */ proc_ro_t p_proc_ro; pid_t p_ppid; /* process's parent pid number */ pid_t p_original_ppid; /* process's original parent pid number, doesn't change if reparented */ pid_t p_pgrpid; /* process group id of the process (LL)*/ uid_t p_uid; gid_t p_gid; uid_t p_ruid; gid_t p_rgid; uid_t p_svuid; gid_t p_svgid; pid_t p_sessionid; uint64_t p_puniqueid; /* parent's unique ID - set on fork/spawn, doesn't change if reparented. */ lck_mtx_t p_mlock; /* mutex lock for proc */ pid_t p_pid; /* Process identifier for proc_find. (static)*/ char p_stat; /* S* process status. (PL)*/ char p_shutdownstate; char p_kdebug; /* P_KDEBUG eq (CC)*/ char p_btrace; /* P_BTRACE eq (CC)*/ LIST_ENTRY(proc) p_pglist; /* List of processes in pgrp (PGL) */ LIST_ENTRY(proc) p_sibling; /* List of sibling processes (LL)*/ LIST_HEAD(, proc) p_children; /* Pointer to list of children (LL)*/ TAILQ_HEAD(, uthread) p_uthlist; /* List of uthreads (PL) */ struct smrq_slink p_hash; /* Hash chain (LL)*/ #if CONFIG_PERSONAS struct persona *p_persona; LIST_ENTRY(proc) p_persona_list; #endif lck_mtx_t p_ucred_mlock; /* mutex lock to protect p_ucred */ /* substructures: */ struct filedesc p_fd; /* open files structure */ struct pstats *p_stats; /* Accounting/statistics (PL) */ SMR_POINTER(struct plimit *) p_limit;/* Process limits (PL) */ SMR_POINTER(struct pgrp *XNU_PTRAUTH_SIGNED_PTR("proc.p_pgrp")) p_pgrp; /* Pointer to process group. (LL) */ struct sigacts p_sigacts; lck_spin_t p_slock; /* spin lock for itimer/profil protection */ int p_siglist; /* signals captured back from threads */ unsigned int p_flag; /* P_* flags. (atomic bit ops) */ unsigned int p_lflag; /* local flags (PL) */ unsigned int p_listflag; /* list flags (LL) */ unsigned int p_ladvflag; /* local adv flags (atomic) */ os_ref_atomic_t p_refcount; /* number of outstanding users */ os_ref_atomic_t p_waitref; /* number of users pending transition */ int p_childrencnt; /* children holding ref on parent (LL) */ int p_parentref; /* children lookup ref on parent (LL) */ pid_t p_oppid; /* Save parent pid during ptrace. XXX */ u_int p_xstat; /* Exit status for wait; also stop signal. */ int p_aio_total_count; /* all allocated AIO requests for this proc */ #ifdef _PROC_HAS_SCHEDINFO_ /* may need cleanup, not used */ u_int p_estcpu; /* Time averaged value of p_cpticks.(used by aio and proc_comapre) */ fixpt_t p_pctcpu; /* %cpu for this process during p_swtime (used by aio)*/ u_int p_slptime; /* used by proc_compare */ #endif /* _PROC_HAS_SCHEDINFO_ */ struct itimerval p_realtimer; /* Alarm timer. (PSL) */ struct timeval p_rtime; /* Real time.(PSL) */ struct itimerval p_vtimer_user; /* Virtual timers.(PSL) */ struct itimerval p_vtimer_prof; /* (PSL) */ struct timeval p_rlim_cpu; /* Remaining rlim cpu value.(PSL) */ int p_debugger; /* NU 1: can exec set-bit programs if suser */ boolean_t sigwait; /* indication to suspend (PL) */ void *sigwait_thread; /* 'thread' holding sigwait(PL) */ void *exit_thread; /* Which thread is exiting(PL) */ /* Following fields are info from SIGCHLD (PL) */ pid_t si_pid; /* (PL) */ u_int si_status; /* (PL) */ u_int si_code; /* (PL) */ uid_t si_uid; /* (PL) */ void * vm_shm; /* (SYSV SHM Lock) for sysV shared memory */ int p_ractive; /* cached proc-specific data required for corpse inspection */ pid_t p_responsible_pid; /* pid resonsible for this process */ #if CONFIG_DTRACE int p_dtrace_probes; /* (PL) are there probes for this proc? */ u_int p_dtrace_count; /* (sprlock) number of DTrace tracepoints */ uint8_t p_dtrace_stop; /* indicates a DTrace-desired stop */ user_addr_t p_dtrace_argv; /* (write once, read only after that) */ user_addr_t p_dtrace_envp; /* (write once, read only after that) */ lck_mtx_t p_dtrace_sprlock; /* sun proc lock emulation */ struct dtrace_ptss_page* p_dtrace_ptss_pages; /* (sprlock) list of user ptss pages */ struct dtrace_ptss_page_entry* p_dtrace_ptss_free_list; /* (atomic) list of individual ptss entries */ struct dtrace_helpers* p_dtrace_helpers; /* (dtrace_lock) DTrace per-proc private */ struct dof_ioctl_data* p_dtrace_lazy_dofs; /* (sprlock) unloaded dof_helper_t's */ #endif /* CONFIG_DTRACE */ __xnu_struct_group(proc_forkcopy_data, p_forkcopy, { u_int p_argslen; /* Length of process arguments. */ int p_argc; /* saved argc for sysctl_procargs() */ user_addr_t user_stack; /* where user stack was allocated */ struct vnode * XNU_PTRAUTH_SIGNED_PTR("proc.p_textvp") p_textvp; /* Vnode of executable. */ off_t p_textoff; /* offset in executable vnode */ sigset_t p_sigmask; /* DEPRECATED */ sigset_t p_sigignore; /* Signals being ignored. (PL) */ sigset_t p_sigcatch; /* Signals being caught by user.(PL) */ u_char p_priority; /* (NU) Process priority. */ u_char p_resv0; /* (NU) User-priority based on p_cpu and p_nice. */ char p_nice; /* Process "nice" value.(PL) */ u_char p_resv1; /* (NU) User-priority based on p_cpu and p_nice. */ // types currently in sys/param.h command_t p_comm; proc_name_t p_name; /* can be changed by the process */ uint8_t p_xhighbits; /* Stores the top byte of exit status to avoid truncation*/ pid_t p_contproc; /* last PID to send us a SIGCONT (PL) */ uint32_t p_pcaction; /* action for process control on starvation */ uint8_t p_uuid[16]; /* from LC_UUID load command */ /* * CPU type and subtype of binary slice executed in * this process. Protected by proc lock. */ cpu_type_t p_cputype; cpu_subtype_t p_cpusubtype; }); TAILQ_HEAD(, aio_workq_entry ) p_aio_activeq; /* active async IO requests */ TAILQ_HEAD(, aio_workq_entry ) p_aio_doneq; /* completed async IO requests */ struct klist p_klist; /* knote list (PL ?)*/ struct rusage_superset *p_ru; /* Exit information. (PL) */ thread_t p_signalholder; thread_t p_transholder; int p_sigwaitcnt; /* DEPRECATE following field */ u_short p_acflag; /* Accounting flags. */ volatile u_short p_vfs_iopolicy; /* VFS iopolicy flags. (atomic bit ops) */ user_addr_t p_threadstart; /* pthread start fn */ user_addr_t p_wqthread; /* pthread workqueue fn */ int p_pthsize; /* pthread size */ uint32_t p_pth_tsd_offset; /* offset from pthread_t to TSD for new threads */ user_addr_t p_stack_addr_hint; /* stack allocation hint for wq threads */ struct workqueue *_Atomic p_wqptr; /* workq ptr */ struct timeval p_start; /* starting time */ void * p_rcall; void * p_pthhash; /* pthread waitqueue hash */ volatile uint64_t was_throttled __attribute__((aligned(8))); /* Counter for number of throttled I/Os */ volatile uint64_t did_throttle __attribute__((aligned(8))); /* Counter for number of I/Os this proc throttled */ #if DIAGNOSTIC unsigned int p_fdlock_pc[4]; unsigned int p_fdunlock_pc[4]; #if SIGNAL_DEBUG unsigned int lockpc[8]; unsigned int unlockpc[8]; #endif /* SIGNAL_DEBUG */ #endif /* DIAGNOSTIC */ uint64_t p_dispatchqueue_offset; uint64_t p_dispatchqueue_serialno_offset; uint64_t p_dispatchqueue_label_offset; uint64_t p_return_to_kernel_offset; uint64_t p_mach_thread_self_offset; /* The offset is set to 0 if userspace is not requesting for this feature */ uint64_t p_pthread_wq_quantum_offset; #if VM_PRESSURE_EVENTS struct timeval vm_pressure_last_notify_tstamp; #endif uint8_t p_crash_behavior; /* bit fields to control behavior on crash. See spawn.h POSIX_SPAWN_PANIC* */ bool p_posix_spawn_failed; /* indicates that a posix_spawn failed */ bool p_disallow_map_with_linking; /* used to prevent dyld's map_with_linking() usage after startup */ #if CONFIG_MEMORYSTATUS #if CONFIG_FREEZE uint8_t p_memstat_freeze_skip_reason; /* memorystaus_freeze_skipped_reason_t. Protected by the freezer mutex. */ #endif /* CONFIG_FREEZE */ /* Fields protected by proc list lock */ uint32_t p_memstat_state; /* state. Also used as a wakeup channel when the memstat's LOCKED bit changes */ int32_t p_memstat_effectivepriority; /* priority after transaction state accounted for */ int32_t p_memstat_requestedpriority; /* active priority */ int32_t p_memstat_assertionpriority; /* assertion driven priority */ uint32_t p_memstat_dirty; /* dirty state */ TAILQ_ENTRY(proc) p_memstat_list; /* priority bucket link */ uint64_t p_memstat_userdata; /* user state */ uint64_t p_memstat_idledeadline; /* time at which process became clean */ uint64_t p_memstat_idle_start; /* abstime process transitions into the idle band */ uint64_t p_memstat_idle_delta; /* abstime delta spent in idle band */ int32_t p_memstat_memlimit; /* cached memory limit, toggles between active and inactive limits */ int32_t p_memstat_memlimit_active; /* memory limit enforced when process is in active jetsam state */ int32_t p_memstat_memlimit_inactive; /* memory limit enforced when process is in inactive jetsam state */ int32_t p_memstat_relaunch_flags; /* flags indicating relaunch behavior for the process */ #if CONFIG_FREEZE uint32_t p_memstat_freeze_sharedanon_pages; /* shared pages left behind after freeze */ uint32_t p_memstat_frozen_count; uint32_t p_memstat_thaw_count; uint32_t p_memstat_last_thaw_interval; /* In which freezer interval was this last thawed? */ #endif /* CONFIG_FREEZE */ #endif /* CONFIG_MEMORYSTATUS */ _Atomic uint32_t p_user_faults; /* count the number of user faults generated */ uint32_t p_memlimit_increase; /* byte increase for memory limit for dyld SPI rdar://problem/49950264, structure packing 32-bit and 64-bit */ uint64_t p_crash_behavior_deadline; /* mach_continuous_time deadline. After this timestamp p_crash_behavior is invalid */ uint32_t p_crash_count; /* Consecutive crash count threshold */ uint32_t p_throttle_timeout; /* Exponential backoff throttle */ struct os_reason *p_exit_reason; #if CONFIG_PROC_UDATA_STORAGE uint64_t p_user_data; /* general-purpose storage for userland-provided data */ #endif /* CONFIG_PROC_UDATA_STORAGE */ char * p_subsystem_root_path; }; /* * Identify a process uniquely. * proc_ident's fields match 1-1 with those in struct proc. */ struct proc_ident { uint64_t p_uniqueid; pid_t p_pid; int p_idversion; }; #define PGRPID_DEAD 0xdeaddead /* p_listflag */ #define P_LIST_WAITING 0x00000010 #define P_LIST_CHILDDRSTART 0x00000080 #define P_LIST_CHILDDRAINED 0x00000100 #define P_LIST_CHILDDRWAIT 0x00000200 #define P_LIST_CHILDLKWAIT 0x00000400 #define P_LIST_DEADPARENT 0x00000800 #define P_LIST_PARENTREFWAIT 0x00001000 #define P_LIST_EXITCOUNT 0x00100000 /* counted for process exit */ /* local flags */ #define P_LDELAYTERM 0x00000001 /* */ #define P_LHASTASK 0x00000002 /* process points to a task */ #define P_LTERM 0x00000004 /* */ #define P_LEXIT 0x00000008 /* */ #define P_LPEXIT 0x00000010 #define P_LTRANSCOMMIT 0x00000020 /* process is committed to trans */ #define P_LINTRANSIT 0x00000040 /* process in exec or in creation */ #define P_LTRANSWAIT 0x00000080 /* waiting for trans to complete */ #define P_LTRACED 0x00000400 /* */ #define P_LSIGEXC 0x00000800 /* */ #define P_LNOATTACH 0x00001000 /* */ #define P_LPPWAIT 0x00002000 /* */ #define P_LPTHREADJITALLOWLIST 0x00004000 /* process has pthread JIT write function allowlist */ #define P_LPTHREADJITFREEZELATE 0x00008000 /* process JIT function allowlist is frozen late */ #define P_LTRACE_WAIT 0x00010000 /* wait for flag to be cleared before starting ptrace */ #define P_LLIMCHANGE 0x00020000 /* process is changing its plimit (rlim_cur, rlim_max) */ #define P_LLIMWAIT 0x00040000 #define P_LWAITED 0x00080000 #define P_LINSIGNAL 0x00100000 #define P_LCUSTOM_STACK 0x00200000 /* process is using custom stack size */ #define P_LRAGE_VNODES 0x00400000 #define P_LREGISTER 0x00800000 /* thread start fns registered */ #define P_LVMRSRCOWNER 0x01000000 /* can handle the resource ownership of */ #define P_LTERM_DECRYPTFAIL 0x04000000 /* process terminating due to key failure to decrypt */ #define P_LTERM_JETSAM 0x08000000 /* process is being jetsam'd */ #define P_JETSAM_VMPAGESHORTAGE 0x00000000 /* jetsam: lowest jetsam priority proc, killed due to vm page shortage */ #define P_JETSAM_VMTHRASHING 0x10000000 /* jetsam: lowest jetsam priority proc, killed due to vm thrashing */ #define P_JETSAM_HIWAT 0x20000000 /* jetsam: high water mark */ #define P_JETSAM_PID 0x30000000 /* jetsam: pid */ #define P_JETSAM_IDLEEXIT 0x40000000 /* jetsam: idle exit */ #define P_JETSAM_VNODE 0x50000000 /* jetsam: vnode kill */ #define P_JETSAM_FCTHRASHING 0x60000000 /* jetsam: lowest jetsam priority proc, killed due to filecache thrashing */ #define P_JETSAM_MASK 0x70000000 /* jetsam type mask */ #define P_LNSPACE_RESOLVER 0x80000000 /* process is the namespace resolver */ /* Process control state for resource starvation */ #define P_PCTHROTTLE 1 #define P_PCSUSP 2 #define P_PCKILL 3 #define P_PCMAX 3 /* Process control action state on resrouce starvation */ #define PROC_ACTION_MASK 0xffff0000; #define PROC_CONTROL_STATE(p) (p->p_pcaction & P_PCMAX) #define PROC_ACTION_STATE(p) ((p->p_pcaction >> 16) & P_PCMAX) #define PROC_SETACTION_STATE(p) (p->p_pcaction = (PROC_CONTROL_STATE(p) | (PROC_CONTROL_STATE(p) << 16))) #define PROC_RESETACTION_STATE(p) (p->p_pcaction = PROC_CONTROL_STATE(p)) /* Process exit reason macros */ #define PROC_HAS_EXITREASON(p) (p->p_exit_reason != OS_REASON_NULL) #define PROC_EXITREASON_FLAGS(p) p->p_exit_reason->osr_flags /* additional process flags */ #define P_LADVLOCK 0x01 #define P_LXBKIDLEINPROG 0x02 #define P_RSR 0x04 /* p_vfs_iopolicy flags */ #define P_VFS_IOPOLICY_FORCE_HFS_CASE_SENSITIVITY 0x0001 #define P_VFS_IOPOLICY_ATIME_UPDATES 0x0002 #define P_VFS_IOPOLICY_MATERIALIZE_DATALESS_FILES 0x0004 #define P_VFS_IOPOLICY_STATFS_NO_DATA_VOLUME 0x0008 #define P_VFS_IOPOLICY_TRIGGER_RESOLVE_DISABLE 0x0010 #define P_VFS_IOPOLICY_IGNORE_CONTENT_PROTECTION 0x0020 #define P_VFS_IOPOLICY_IGNORE_NODE_PERMISSIONS 0x0040 #define P_VFS_IOPOLICY_SKIP_MTIME_UPDATE 0x0080 #define P_VFS_IOPOLICY_ALLOW_LOW_SPACE_WRITES 0x0100 #define P_VFS_IOPOLICY_DISALLOW_RW_FOR_O_EVTONLY 0x0200 #define P_VFS_IOPOLICY_ALTLINK 0x0400 #define P_VFS_IOPOLICY_VALID_MASK \ (P_VFS_IOPOLICY_FORCE_HFS_CASE_SENSITIVITY | \ P_VFS_IOPOLICY_ATIME_UPDATES | \ P_VFS_IOPOLICY_MATERIALIZE_DATALESS_FILES | \ P_VFS_IOPOLICY_STATFS_NO_DATA_VOLUME | \ P_VFS_IOPOLICY_TRIGGER_RESOLVE_DISABLE | \ P_VFS_IOPOLICY_IGNORE_CONTENT_PROTECTION | \ P_VFS_IOPOLICY_IGNORE_NODE_PERMISSIONS | \ P_VFS_IOPOLICY_SKIP_MTIME_UPDATE | \ P_VFS_IOPOLICY_ALLOW_LOW_SPACE_WRITES | \ P_VFS_IOPOLICY_DISALLOW_RW_FOR_O_EVTONLY | \ P_VFS_IOPOLICY_ALTLINK) /* process creation arguments */ #define PROC_CREATE_FORK 0 /* independent child (running) */ #define PROC_CREATE_SPAWN 1 /* independent child (suspended) */ /* LP64 version of extern_proc. all pointers * grow when we're dealing with a 64-bit process. * WARNING - keep in sync with extern_proc * but use native alignment of 64-bit process. */ #ifdef KERNEL #include <sys/time.h> /* user_timeval, user_itimerval */ /* * This packing is required to ensure symmetry between userspace and kernelspace * when the kernel is 64-bit and the user application is 32-bit. All currently * supported ARM slices (arm64/armv7k/arm64_32) contain the same struct * alignment ABI so this packing isn't needed for ARM. */ #if defined(__x86_64__) #pragma pack(4) #endif struct user32_extern_proc { union { struct { uint32_t __p_forw; /* Doubly-linked run/sleep queue. */ uint32_t __p_back; } p_st1; struct user32_timeval __p_starttime; /* process start time */ } p_un; uint32_t p_vmspace; /* Address space. */ uint32_t p_sigacts; /* Signal actions, state (PROC ONLY). */ int p_flag; /* P_* flags. */ char p_stat; /* S* process status. */ pid_t p_pid; /* Process identifier. */ pid_t p_oppid; /* Save parent pid during ptrace. XXX */ int p_dupfd; /* Sideways return value from fdopen. XXX */ /* Mach related */ uint32_t user_stack; /* where user stack was allocated */ uint32_t exit_thread; /* XXX Which thread is exiting? */ int p_debugger; /* allow to debug */ boolean_t sigwait; /* indication to suspend */ /* scheduling */ u_int p_estcpu; /* Time averaged value of p_cpticks. */ int p_cpticks; /* Ticks of cpu time. */ fixpt_t p_pctcpu; /* %cpu for this process during p_swtime */ uint32_t p_wchan; /* Sleep address. */ uint32_t p_wmesg; /* Reason for sleep. */ u_int p_swtime; /* Time swapped in or out. */ u_int p_slptime; /* Time since last blocked. */ struct user32_itimerval p_realtimer; /* Alarm timer. */ struct user32_timeval p_rtime; /* Real time. */ u_quad_t p_uticks; /* Statclock hits in user mode. */ u_quad_t p_sticks; /* Statclock hits in system mode. */ u_quad_t p_iticks; /* Statclock hits processing intr. */ int p_traceflag; /* Kernel trace points. */ uint32_t p_tracep; /* Trace to vnode. */ int p_siglist; /* DEPRECATED */ uint32_t p_textvp; /* Vnode of executable. */ int p_holdcnt; /* If non-zero, don't swap. */ sigset_t p_sigmask; /* DEPRECATED. */ sigset_t p_sigignore; /* Signals being ignored. */ sigset_t p_sigcatch; /* Signals being caught by user. */ u_char p_priority; /* Process priority. */ u_char p_usrpri; /* User-priority based on p_cpu and p_nice. */ char p_nice; /* Process "nice" value. */ char p_comm[MAXCOMLEN + 1]; uint32_t p_pgrp; /* Pointer to process group. */ uint32_t p_addr; /* Kernel virtual addr of u-area (PROC ONLY). */ u_short p_xstat; /* Exit status for wait; also stop signal. */ u_short p_acflag; /* Accounting flags. */ uint32_t p_ru; /* Exit information. XXX */ }; #pragma pack() struct user64_extern_proc { union { struct { user_addr_t __p_forw; /* Doubly-linked run/sleep queue. */ user_addr_t __p_back; } p_st1; struct user64_timeval __p_starttime; /* process start time */ } p_un; user_addr_t p_vmspace; /* Address space. */ user_addr_t p_sigacts; /* Signal actions, state (PROC ONLY). */ int p_flag; /* P_* flags. */ char p_stat; /* S* process status. */ pid_t p_pid; /* Process identifier. */ pid_t p_oppid; /* Save parent pid during ptrace. XXX */ int p_dupfd; /* Sideways return value from fdopen. XXX */ /* Mach related */ user_addr_t user_stack __attribute((aligned(8))); /* where user stack was allocated */ user_addr_t exit_thread; /* XXX Which thread is exiting? */ int p_debugger; /* allow to debug */ boolean_t sigwait; /* indication to suspend */ /* scheduling */ u_int p_estcpu; /* Time averaged value of p_cpticks. */ int p_cpticks; /* Ticks of cpu time. */ fixpt_t p_pctcpu; /* %cpu for this process during p_swtime */ user_addr_t p_wchan __attribute((aligned(8))); /* Sleep address. */ user_addr_t p_wmesg; /* Reason for sleep. */ u_int p_swtime; /* Time swapped in or out. */ u_int p_slptime; /* Time since last blocked. */ struct user64_itimerval p_realtimer; /* Alarm timer. */ struct user64_timeval p_rtime; /* Real time. */ u_quad_t p_uticks; /* Statclock hits in user mode. */ u_quad_t p_sticks; /* Statclock hits in system mode. */ u_quad_t p_iticks; /* Statclock hits processing intr. */ int p_traceflag; /* Kernel trace points. */ user_addr_t p_tracep __attribute((aligned(8))); /* Trace to vnode. */ int p_siglist; /* DEPRECATED */ user_addr_t p_textvp __attribute((aligned(8))); /* Vnode of executable. */ int p_holdcnt; /* If non-zero, don't swap. */ sigset_t p_sigmask; /* DEPRECATED. */ sigset_t p_sigignore; /* Signals being ignored. */ sigset_t p_sigcatch; /* Signals being caught by user. */ u_char p_priority; /* Process priority. */ u_char p_usrpri; /* User-priority based on p_cpu and p_nice. */ char p_nice; /* Process "nice" value. */ char p_comm[MAXCOMLEN + 1]; user_addr_t p_pgrp __attribute((aligned(8))); /* Pointer to process group. */ user_addr_t p_addr; /* Kernel virtual addr of u-area (PROC ONLY). */ u_short p_xstat; /* Exit status for wait; also stop signal. */ u_short p_acflag; /* Accounting flags. */ user_addr_t p_ru __attribute((aligned(8))); /* Exit information. XXX */ }; #endif /* KERNEL */ #pragma GCC visibility push(hidden) extern struct vfs_context vfs_context0; /* * We use process IDs <= PID_MAX; PID_MAX + 1 must also fit in a pid_t, * as it is used to represent "no process group". */ extern int nprocs, maxproc; /* Current and max number of procs. */ extern int maxprocperuid; /* Current number of procs per uid */ extern int hard_maxproc; /* hard limit */ extern unsigned int proc_shutdown_exitcount; #define PID_MAX 99999 #define NO_PID 100000 extern lck_mtx_t proc_list_mlock; #define BSD_SIMUL_EXECS 33 /* 32 , allow for rounding */ #define BSD_PAGEABLE_SIZE_PER_EXEC (NCARGS + PAGE_SIZE + PAGE_SIZE) /* page for apple vars, page for executable header */ extern int execargs_cache_size; extern int execargs_free_count; extern vm_offset_t * execargs_cache; #define SESS_LEADER(p, sessp) ((sessp)->s_leader == (p)) #define SESSHASH(sessid) (&sesshashtbl[(sessid) & sesshash]) extern LIST_HEAD(sesshashhead, session) * sesshashtbl; extern u_long sesshash; extern lck_attr_t proc_lck_attr; extern lck_grp_t proc_fdmlock_grp; extern lck_grp_t proc_lck_grp; extern lck_grp_t proc_kqhashlock_grp; extern lck_grp_t proc_knhashlock_grp; extern lck_grp_t proc_slock_grp; extern lck_grp_t proc_mlock_grp; extern lck_grp_t proc_ucred_mlock_grp; extern lck_grp_t proc_dirslock_grp; LIST_HEAD(proclist, proc); extern struct proclist allproc; /* List of all processes. */ extern struct proclist zombproc; /* List of zombie processes. */ #if CONFIG_COREDUMP extern const char * defaultcorefiledir; extern const char * defaultdrivercorefiledir; extern char corefilename[MAXPATHLEN + 1]; extern char drivercorefilename[MAXPATHLEN + 1]; extern int do_coredump; extern int sugid_coredump; #endif __options_decl(cloneproc_flags_t, uint32_t, { CLONEPROC_FLAGS_NONE = 0, CLONEPROC_FLAGS_INHERIT_MEMORY = 0x0001, CLONEPROC_FLAGS_MEMSTAT_INTERNAL = 0x0002, CLONEPROC_FLAGS_FOR_EXEC = 0x0004, }); extern thread_t cloneproc(task_t, coalition_t *, proc_t, cloneproc_flags_t); extern struct proc * XNU_PTRAUTH_SIGNED_PTR("initproc") initproc; extern void proc_lock(struct proc *); extern void proc_unlock(struct proc *); extern void proc_spinlock(struct proc *); extern void proc_spinunlock(struct proc *); extern void proc_list_lock(void); extern void proc_list_unlock(void); extern void proc_klist_lock(void); extern void proc_klist_unlock(void); extern void proc_fdlock(struct proc *); extern void proc_fdlock_spin(struct proc *); extern void proc_fdunlock(struct proc *); extern void proc_fdlock_assert(proc_t p, int assertflags); extern void proc_dirs_lock_shared(struct proc *); extern void proc_dirs_unlock_shared(struct proc *); extern void proc_dirs_lock_exclusive(struct proc *); extern void proc_dirs_unlock_exclusive(struct proc *); extern void proc_ucred_lock(struct proc *); extern void proc_ucred_unlock(struct proc *); extern void proc_update_creds_onproc(struct proc *); #if CONFIG_COREDUMP __private_extern__ int proc_core_name(const char *format, const char *name, uid_t uid, pid_t pid, char *cr_name, size_t cr_name_len); #endif extern int isinferior(struct proc *, struct proc *); __private_extern__ struct proc *pzfind(pid_t); /* Find zombie by id. */ __private_extern__ struct proc *proc_find_zombref(pid_t); /* Find zombie by id. */ __private_extern__ void proc_drop_zombref(struct proc * p); /* Find zombie by id. */ extern size_t chgproccnt(uid_t uid, int diff); extern void pinsertchild(struct proc *parent, struct proc *child, bool in_exec); extern void p_reparentallchildren(proc_t old_proc, proc_t new_proc); extern int setsid_internal(struct proc *p); #ifndef __cplusplus extern void setlogin_internal(proc_t p, const char login[static MAXLOGNAME]); #endif // __cplusplus extern int setgroups_internal(proc_t p, u_int gidsetsize, gid_t *gidset, uid_t gmuid); extern int enterpgrp(struct proc *p, pid_t pgid, int mksess); extern void fixjobc(struct proc *p, struct pgrp *pgrp, int entering); extern int inferior(struct proc *p); extern void resetpriority(struct proc *); extern void setrunnable(struct proc *); extern void setrunqueue(struct proc *); extern int sleep(void *chan, int pri) __exported; extern int tsleep0(void *chan, int pri, const char *wmesg, int timo, int (*continuation)(int)); extern int tsleep1(void *chan, int pri, const char *wmesg, u_int64_t abstime, int (*continuation)(int)); extern int exit1(struct proc *, int, int *); extern int exit1_internal(struct proc *, int, int *, boolean_t, boolean_t, int); extern int exit_with_reason(struct proc *, int, int *, boolean_t, boolean_t, int, struct os_reason *); extern int fork1(proc_t, thread_t *, int, coalition_t *); extern void proc_reparentlocked(struct proc *child, struct proc * newparent, int cansignal, int locked); extern bool proc_list_exited(proc_t p); extern proc_t proc_find_locked(int pid); extern bool proc_is_shadow(proc_t p); extern proc_t proc_findthread(thread_t thread); extern void proc_refdrain(proc_t); extern proc_t proc_refdrain_will_exec(proc_t p); extern void proc_refwake_did_exec(proc_t p); extern void proc_childdrainlocked(proc_t); extern void proc_childdrainstart(proc_t); extern void proc_childdrainend(proc_t); extern void proc_checkdeadrefs(proc_t); struct proc *phash_find_locked(pid_t); extern void phash_insert_locked(struct proc *); extern void phash_remove_locked(struct proc *); extern void phash_replace_locked(struct proc *old_proc, struct proc *new_proc); extern bool pghash_exists_locked(pid_t); extern void pghash_insert_locked(struct pgrp *); extern struct pgrp *pgrp_find(pid_t); extern void pgrp_rele(struct pgrp * pgrp); extern struct session * session_find_internal(pid_t sessid); extern struct pgrp *proc_pgrp(proc_t, struct session **); extern struct pgrp *pgrp_leave_locked(struct proc *p); extern struct pgrp *pgrp_enter_locked(struct proc *parent, struct proc *p); extern struct pgrp *tty_pgrp_locked(struct tty * tp); struct pgrp *pgrp_alloc(pid_t pgid, pggrp_ref_bits_t bits); extern void pgrp_lock(struct pgrp * pgrp); extern void pgrp_unlock(struct pgrp * pgrp); extern struct session *session_find_locked(pid_t sessid); extern void session_replace_leader(struct proc *old_proc, struct proc *new_proc); extern struct session *session_alloc(struct proc *leader); extern void session_lock(struct session * sess); extern void session_unlock(struct session * sess); extern struct session *session_ref(struct session *sess); extern void session_rele(struct session *sess); extern struct tty *session_set_tty_locked(struct session *sessp, struct tty *); extern struct tty *session_clear_tty_locked(struct session *sess); extern struct tty *session_tty(struct session *sess); extern proc_t proc_parentholdref(proc_t); extern int proc_parentdropref(proc_t, int); int itimerfix(struct timeval *tv); int itimerdecr(struct proc * p, struct itimerval *itp, int usec); void proc_free_realitimer(proc_t proc); void proc_inherit_itimers(struct proc *old_proc, struct proc *new_proc); int timespec_is_valid(const struct timespec *); void proc_signalstart(struct proc *, int locked); void proc_signalend(struct proc *, int locked); int proc_transstart(struct proc *, int locked, int non_blocking); void proc_transcommit(struct proc *, int locked); void proc_transend(struct proc *, int locked); int proc_transwait(struct proc *, int locked); struct proc *proc_ref(struct proc *p, int locked); void proc_wait_release(struct proc *p); void proc_knote(struct proc * p, long hint); void proc_transfer_knotes(struct proc *old_proc, struct proc *new_proc); void proc_knote_drain(struct proc *p); void proc_setregister(proc_t p); void proc_resetregister(proc_t p); bool proc_get_pthread_jit_allowlist(proc_t p, bool *late_out); void proc_set_pthread_jit_allowlist(proc_t p, bool late); /* returns the first thread_t in the process, or NULL XXX for NFS, DO NOT USE */ thread_t proc_thread(proc_t); extern int proc_pendingsignals(proc_t, sigset_t); int proc_getpcontrol(int pid, int * pcontrolp); int proc_dopcontrol(proc_t p); int proc_resetpcontrol(int pid); #if PSYNCH void pth_proc_hashinit(proc_t); void pth_proc_hashdelete(proc_t); void pth_global_hashinit(void); extern thread_call_t psynch_thcall; void psynch_wq_cleanup(__unused void * param, __unused void * param1); extern lck_mtx_t * pthread_list_mlock; #endif /* PSYNCH */ struct uthread *current_uthread(void) __pure2; extern void proc_set_task(proc_t, task_t); extern task_t proc_get_task_raw(proc_t proc); extern proc_t task_get_proc_raw(task_t task); extern void proc_ref_hold_proc_task_struct(proc_t proc); extern void proc_release_proc_task_struct(proc_t proc); extern void task_ref_hold_proc_task_struct(task_t task); extern void task_release_proc_task_struct(task_t task); extern void proc_setpidversion(proc_t, int); extern uint64_t proc_getcsflags(proc_t); extern void proc_csflags_update(proc_t, uint64_t); extern void proc_csflags_set(proc_t, uint64_t); extern void proc_csflags_clear(proc_t, uint64_t); extern uint8_t *proc_syscall_filter_mask(proc_t); extern void proc_syscall_filter_mask_set(proc_t, uint8_t *); extern pid_t proc_getpid(proc_t); extern void proc_setplatformdata(proc_t, uint32_t, uint32_t, uint32_t); extern void proc_set_sigact(proc_t, int, user_addr_t); extern void proc_set_trampact(proc_t, int, user_addr_t); extern void proc_set_sigact_trampact(proc_t, int, user_addr_t, user_addr_t); extern void proc_reset_sigact(proc_t, sigset_t); extern void proc_set_ucred(proc_t, kauth_cred_t); extern bool proc_update_label(proc_t p, bool setugid, kauth_cred_t (^update_cred)(kauth_cred_t)); extern void proc_setexecutableuuid(proc_t, const uuid_t); extern const unsigned char *proc_executableuuid_addr(proc_t); #pragma mark - process iteration /* * ALLPROC_FOREACH cannot be used to access the task, as the field may be * swapped out during exec. With `proc_iterate`, find threads by iterating the * `p_uthlist` field of the proc, under the `proc_lock`. */ #define ALLPROC_FOREACH(var) \ LIST_FOREACH((var), &allproc, p_list) #define ZOMBPROC_FOREACH(var) \ LIST_FOREACH((var), &zombproc, p_list) #define PGMEMBERS_FOREACH(group, var) \ LIST_FOREACH((var), &((struct pgrp *)(group))->pg_members, p_pglist) #define PCHILDREN_FOREACH(parent, var) \ LIST_FOREACH((var), &(((struct proc *)(parent))->p_children), p_sibling) typedef int (*proc_iterate_fn_t)(proc_t, void *); /* * These are the only valid return values of `callout` functions provided to * process iterators. * * CLAIMED returns expect the caller to call proc_rele on the proc. DONE * returns stop iterating processes early. */ #define PROC_RETURNED (0) #define PROC_RETURNED_DONE (1) #define PROC_CLAIMED (2) #define PROC_CLAIMED_DONE (3) /* * pgrp_iterate walks the provided process group, calling `filterfn` with * `filterarg` for each process. For processes where `filterfn` returned * non-zero, `callout` is called with `arg`. * * `PGMEMBERS_FOREACH` might also be used under the pgrp_lock to achieve a * similar effect. */ extern void pgrp_iterate(struct pgrp *pgrp, proc_iterate_fn_t callout, void *arg, bool (^filterfn)(proc_t)); /* * proc_iterate walks the `allproc` and/or `zombproc` lists, calling `filterfn` * with `filterarg` for each process. For processes where `filterfn` returned * non-zero, `callout` is called with `arg`. If the `PROC_NOWAITTRANS` flag is * unset, this function waits for transitions. * * `ALLPROC_FOREACH` or `ZOMBPROC_FOREACH` might also be used under the * `proc_list_lock` to achieve a similar effect. */ #define PROC_ALLPROCLIST (1U << 0) /* walk the allproc list (processes not yet exited) */ #define PROC_ZOMBPROCLIST (1U << 1) /* walk the zombie list */ #define PROC_NOWAITTRANS (1U << 2) /* do not wait for transitions (checkdirs only) */ extern void proc_iterate(unsigned int flags, proc_iterate_fn_t callout, void *arg, proc_iterate_fn_t filterfn, void *filterarg); /* * proc_childrenwalk walks the children of process `p`, calling `callout` for * each one. * * `PCHILDREN_FOREACH` might also be used under the `proc_list_lock` to achieve * a similar effect. */ extern void proc_childrenwalk(proc_t p, proc_iterate_fn_t callout, void *arg); /* * proc_rebootscan should only be used by kern_shutdown.c */ extern void proc_rebootscan(proc_iterate_fn_t callout, void *arg, proc_iterate_fn_t filterfn, void *filterarg); pid_t dtrace_proc_selfpid(void); pid_t dtrace_proc_selfppid(void); uid_t dtrace_proc_selfruid(void); os_refgrp_decl_extern(p_refgrp); KALLOC_TYPE_DECLARE(proc_stats_zone); ZONE_DECLARE_ID(ZONE_ID_PROC_TASK, struct proc); extern zone_t proc_task_zone; extern struct proc_ident proc_ident(proc_t p); #if CONFIG_PROC_RESOURCE_LIMITS int proc_set_filedesc_limits(proc_t p, int soft_limit, int hard_limit); #endif /* CONFIG_PROC_RESOURCE_LIMITS */ /* * True if the process ignores file permissions in case it owns the * file/directory */ bool proc_ignores_node_permissions(proc_t proc); #pragma GCC visibility pop #endif /* !_SYS_PROC_INTERNAL_H_ */ |