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ladybird/Kernel/Process.h
Andreas Kling d4195672b7 Kernel+LibC: Add sys$recvfd() and sys$sendfd() for fd passing 
These new syscalls allow you to send and receive file descriptors over
a local domain socket. This will enable various privilege separation
techniques and other good stuff. :^)
2020-06-24 23:08:09 +02:00

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/*
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
* All rights reserved.
*
* 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.
*
* 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 HOLDER 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 <AK/Checked.h>
#include <AK/FixedArray.h>
#include <AK/HashMap.h>
#include <AK/InlineLinkedList.h>
#include <AK/NonnullOwnPtrVector.h>
#include <AK/String.h>
#include <AK/WeakPtr.h>
#include <Kernel/FileSystem/InodeMetadata.h>
#include <Kernel/Forward.h>
#include <Kernel/Lock.h>
#include <Kernel/StdLib.h>
#include <Kernel/Syscall.h>
#include <Kernel/Thread.h>
#include <Kernel/UnixTypes.h>
#include <Kernel/VM/RangeAllocator.h>
#include <LibC/signal_numbers.h>
namespace ELF {
class Loader;
}
namespace Kernel {
timeval kgettimeofday();
void kgettimeofday(timeval&);
extern VirtualAddress g_return_to_ring3_from_signal_trampoline;
#define ENUMERATE_PLEDGE_PROMISES \
__ENUMERATE_PLEDGE_PROMISE(stdio) \
__ENUMERATE_PLEDGE_PROMISE(rpath) \
__ENUMERATE_PLEDGE_PROMISE(wpath) \
__ENUMERATE_PLEDGE_PROMISE(cpath) \
__ENUMERATE_PLEDGE_PROMISE(dpath) \
__ENUMERATE_PLEDGE_PROMISE(inet) \
__ENUMERATE_PLEDGE_PROMISE(id) \
__ENUMERATE_PLEDGE_PROMISE(proc) \
__ENUMERATE_PLEDGE_PROMISE(exec) \
__ENUMERATE_PLEDGE_PROMISE(unix) \
__ENUMERATE_PLEDGE_PROMISE(recvfd) \
__ENUMERATE_PLEDGE_PROMISE(sendfd) \
__ENUMERATE_PLEDGE_PROMISE(fattr) \
__ENUMERATE_PLEDGE_PROMISE(tty) \
__ENUMERATE_PLEDGE_PROMISE(chown) \
__ENUMERATE_PLEDGE_PROMISE(chroot) \
__ENUMERATE_PLEDGE_PROMISE(thread) \
__ENUMERATE_PLEDGE_PROMISE(video) \
__ENUMERATE_PLEDGE_PROMISE(accept) \
__ENUMERATE_PLEDGE_PROMISE(settime) \
__ENUMERATE_PLEDGE_PROMISE(sigaction) \
__ENUMERATE_PLEDGE_PROMISE(setkeymap) \
__ENUMERATE_PLEDGE_PROMISE(shared_buffer)
enum class Pledge : u32 {
#define __ENUMERATE_PLEDGE_PROMISE(x) x,
ENUMERATE_PLEDGE_PROMISES
#undef __ENUMERATE_PLEDGE_PROMISE
};
enum class VeilState {
None,
Dropped,
Locked,
};
struct UnveiledPath {
enum Access {
Read = 1,
Write = 2,
Execute = 4,
CreateOrRemove = 8,
};
String path;
unsigned permissions { 0 };
};
class Process : public InlineLinkedListNode<Process> {
AK_MAKE_NONCOPYABLE(Process);
AK_MAKE_NONMOVABLE(Process);
friend class InlineLinkedListNode<Process>;
friend class Thread;
public:
static Process* current;
static Process* create_kernel_process(Thread*& first_thread, String&& name, void (*entry)());
static Process* create_user_process(Thread*& first_thread, const String& path, uid_t, gid_t, pid_t ppid, int& error, Vector<String>&& arguments = Vector<String>(), Vector<String>&& environment = Vector<String>(), TTY* = nullptr);
~Process();
static Vector<pid_t> all_pids();
static Vector<Process*> all_processes();
bool is_profiling() const { return m_profiling; }
void set_profiling(bool profiling) { m_profiling = profiling; }
enum RingLevel : u8 {
Ring0 = 0,
Ring3 = 3,
};
KBuffer backtrace(ProcessInspectionHandle&) const;
bool is_dead() const { return m_dead; }
bool is_ring0() const { return m_ring == Ring0; }
bool is_ring3() const { return m_ring == Ring3; }
PageDirectory& page_directory() { return *m_page_directory; }
const PageDirectory& page_directory() const { return *m_page_directory; }
static Process* from_pid(pid_t);
const String& name() const { return m_name; }
pid_t pid() const { return m_pid; }
pid_t sid() const { return m_sid; }
pid_t pgid() const { return m_pgid; }
const FixedArray<gid_t>& extra_gids() const { return m_extra_gids; }
uid_t euid() const { return m_euid; }
gid_t egid() const { return m_egid; }
uid_t uid() const { return m_uid; }
gid_t gid() const { return m_gid; }
uid_t suid() const { return m_suid; }
gid_t sgid() const { return m_sgid; }
pid_t ppid() const { return m_ppid; }
pid_t exec_tid() const { return m_exec_tid; }
mode_t umask() const { return m_umask; }
bool in_group(gid_t) const;
RefPtr<FileDescription> file_description(int fd) const;
int fd_flags(int fd) const;
template<typename Callback>
static void for_each(Callback);
template<typename Callback>
static void for_each_in_pgrp(pid_t, Callback);
template<typename Callback>
void for_each_child(Callback);
template<typename Callback>
void for_each_thread(Callback) const;
void die();
void finalize();
int sys$yield();
int sys$sync();
int sys$beep();
int sys$get_process_name(char* buffer, int buffer_size);
int sys$watch_file(const char* path, size_t path_length);
int sys$dbgputch(u8);
int sys$dbgputstr(const u8*, int length);
int sys$dump_backtrace();
int sys$gettid();
int sys$donate(int tid);
int sys$ftruncate(int fd, off_t);
pid_t sys$setsid();
pid_t sys$getsid(pid_t);
int sys$setpgid(pid_t pid, pid_t pgid);
pid_t sys$getpgrp();
pid_t sys$getpgid(pid_t);
uid_t sys$getuid();
gid_t sys$getgid();
uid_t sys$geteuid();
gid_t sys$getegid();
pid_t sys$getpid();
pid_t sys$getppid();
int sys$getresuid(uid_t*, uid_t*, uid_t*);
int sys$getresgid(gid_t*, gid_t*, gid_t*);
mode_t sys$umask(mode_t);
int sys$open(const Syscall::SC_open_params*);
int sys$close(int fd);
ssize_t sys$read(int fd, u8*, ssize_t);
ssize_t sys$write(int fd, const u8*, ssize_t);
ssize_t sys$writev(int fd, const struct iovec* iov, int iov_count);
int sys$fstat(int fd, stat*);
int sys$stat(const Syscall::SC_stat_params*);
int sys$lseek(int fd, off_t, int whence);
int sys$kill(pid_t pid, int sig);
[[noreturn]] void sys$exit(int status);
int sys$sigreturn(RegisterState& registers);
pid_t sys$waitid(const Syscall::SC_waitid_params*);
void* sys$mmap(const Syscall::SC_mmap_params*);
int sys$munmap(void*, size_t size);
int sys$set_mmap_name(const Syscall::SC_set_mmap_name_params*);
int sys$mprotect(void*, size_t, int prot);
int sys$madvise(void*, size_t, int advice);
int sys$minherit(void*, size_t, int inherit);
int sys$purge(int mode);
int sys$select(const Syscall::SC_select_params*);
int sys$poll(const Syscall::SC_poll_params*);
ssize_t sys$get_dir_entries(int fd, void*, ssize_t);
int sys$getcwd(char*, ssize_t);
int sys$chdir(const char*, size_t);
int sys$fchdir(int fd);
int sys$sleep(unsigned seconds);
int sys$usleep(useconds_t usec);
int sys$gettimeofday(timeval*);
int sys$clock_gettime(clockid_t, timespec*);
int sys$clock_settime(clockid_t, timespec*);
int sys$clock_nanosleep(const Syscall::SC_clock_nanosleep_params*);
int sys$gethostname(char*, ssize_t);
int sys$sethostname(const char*, ssize_t);
int sys$uname(utsname*);
int sys$readlink(const Syscall::SC_readlink_params*);
int sys$ttyname_r(int fd, char*, ssize_t);
int sys$ptsname_r(int fd, char*, ssize_t);
pid_t sys$fork(RegisterState&);
int sys$execve(const Syscall::SC_execve_params*);
int sys$dup(int oldfd);
int sys$dup2(int oldfd, int newfd);
int sys$sigaction(int signum, const sigaction* act, sigaction* old_act);
int sys$sigprocmask(int how, const sigset_t* set, sigset_t* old_set);
int sys$sigpending(sigset_t*);
int sys$getgroups(ssize_t, gid_t*);
int sys$setgroups(ssize_t, const gid_t*);
int sys$pipe(int pipefd[2], int flags);
int sys$killpg(int pgrp, int sig);
int sys$seteuid(uid_t);
int sys$setegid(gid_t);
int sys$setuid(uid_t);
int sys$setgid(gid_t);
int sys$setresuid(uid_t, uid_t, uid_t);
int sys$setresgid(gid_t, gid_t, gid_t);
unsigned sys$alarm(unsigned seconds);
int sys$access(const char* pathname, size_t path_length, int mode);
int sys$fcntl(int fd, int cmd, u32 extra_arg);
int sys$ioctl(int fd, unsigned request, FlatPtr arg);
int sys$mkdir(const char* pathname, size_t path_length, mode_t mode);
clock_t sys$times(tms*);
int sys$utime(const char* pathname, size_t path_length, const struct utimbuf*);
int sys$link(const Syscall::SC_link_params*);
int sys$unlink(const char* pathname, size_t path_length);
int sys$symlink(const Syscall::SC_symlink_params*);
int sys$rmdir(const char* pathname, size_t path_length);
int sys$mount(const Syscall::SC_mount_params*);
int sys$umount(const char* mountpoint, size_t mountpoint_length);
int sys$chmod(const char* pathname, size_t path_length, mode_t);
int sys$fchmod(int fd, mode_t);
int sys$chown(const Syscall::SC_chown_params*);
int sys$fchown(int fd, uid_t, gid_t);
int sys$socket(int domain, int type, int protocol);
int sys$bind(int sockfd, const sockaddr* addr, socklen_t);
int sys$listen(int sockfd, int backlog);
int sys$accept(int sockfd, sockaddr*, socklen_t*);
int sys$connect(int sockfd, const sockaddr*, socklen_t);
int sys$shutdown(int sockfd, int how);
ssize_t sys$sendto(const Syscall::SC_sendto_params*);
ssize_t sys$recvfrom(const Syscall::SC_recvfrom_params*);
int sys$getsockopt(const Syscall::SC_getsockopt_params*);
int sys$setsockopt(const Syscall::SC_setsockopt_params*);
int sys$getsockname(const Syscall::SC_getsockname_params*);
int sys$getpeername(const Syscall::SC_getpeername_params*);
int sys$sched_setparam(pid_t pid, const struct sched_param* param);
int sys$sched_getparam(pid_t pid, struct sched_param* param);
int sys$create_thread(void* (*)(void*), const Syscall::SC_create_thread_params*);
void sys$exit_thread(void*);
int sys$join_thread(int tid, void** exit_value);
int sys$detach_thread(int tid);
int sys$set_thread_name(int tid, const char* buffer, size_t buffer_size);
int sys$get_thread_name(int tid, char* buffer, size_t buffer_size);
int sys$rename(const Syscall::SC_rename_params*);
int sys$mknod(const Syscall::SC_mknod_params*);
int sys$shbuf_create(int, void** buffer);
int sys$shbuf_allow_pid(int, pid_t peer_pid);
int sys$shbuf_allow_all(int);
void* sys$shbuf_get(int shbuf_id, size_t* size);
int sys$shbuf_release(int shbuf_id);
int sys$shbuf_seal(int shbuf_id);
int sys$shbuf_set_volatile(int shbuf_id, bool);
int sys$halt();
int sys$reboot();
int sys$set_process_icon(int icon_id);
int sys$realpath(const Syscall::SC_realpath_params*);
ssize_t sys$getrandom(void*, size_t, unsigned int);
int sys$setkeymap(const Syscall::SC_setkeymap_params*);
int sys$module_load(const char* path, size_t path_length);
int sys$module_unload(const char* name, size_t name_length);
int sys$profiling_enable(pid_t);
int sys$profiling_disable(pid_t);
int sys$futex(const Syscall::SC_futex_params*);
int sys$set_thread_boost(int tid, int amount);
int sys$set_process_boost(pid_t, int amount);
int sys$chroot(const char* path, size_t path_length, int mount_flags);
int sys$pledge(const Syscall::SC_pledge_params*);
int sys$unveil(const Syscall::SC_unveil_params*);
int sys$perf_event(int type, FlatPtr arg1, FlatPtr arg2);
int sys$get_stack_bounds(FlatPtr* stack_base, size_t* stack_size);
int sys$ptrace(const Syscall::SC_ptrace_params*);
int sys$sendfd(int sockfd, int fd);
int sys$recvfd(int sockfd);
template<bool sockname, typename Params>
int get_sock_or_peer_name(const Params&);
static void initialize();
[[noreturn]] void crash(int signal, u32 eip, bool out_of_memory = false);
[[nodiscard]] static siginfo_t reap(Process&);
const TTY* tty() const { return m_tty; }
void set_tty(TTY*);
size_t region_count() const { return m_regions.size(); }
const NonnullOwnPtrVector<Region>& regions() const { return m_regions; }
void dump_regions();
u32 m_ticks_in_user { 0 };
u32 m_ticks_in_kernel { 0 };
u32 m_ticks_in_user_for_dead_children { 0 };
u32 m_ticks_in_kernel_for_dead_children { 0 };
[[nodiscard]] bool validate_read_from_kernel(VirtualAddress, size_t) const;
[[nodiscard]] bool validate_read(const void*, size_t) const;
[[nodiscard]] bool validate_write(void*, size_t) const;
template<typename T>
[[nodiscard]] bool validate_read_typed(T* value, size_t count = 1)
{
Checked size = sizeof(T);
size *= count;
if (size.has_overflow())
return false;
return validate_read(value, size.value());
}
template<typename T>
[[nodiscard]] bool validate_read_and_copy_typed(T* dest, const T* src)
{
bool validated = validate_read_typed(src);
if (validated) {
copy_from_user(dest, src);
}
return validated;
}
template<typename T>
[[nodiscard]] bool validate_write_typed(T* value, size_t count = 1)
{
Checked size = sizeof(T);
size *= count;
if (size.has_overflow())
return false;
return validate_write(value, size.value());
}
template<typename DataType, typename SizeType>
[[nodiscard]] bool validate(const Syscall::MutableBufferArgument<DataType, SizeType>&);
template<typename DataType, typename SizeType>
[[nodiscard]] bool validate(const Syscall::ImmutableBufferArgument<DataType, SizeType>&);
[[nodiscard]] String validate_and_copy_string_from_user(const char*, size_t) const;
[[nodiscard]] String validate_and_copy_string_from_user(const Syscall::StringArgument&) const;
Custody& current_directory();
Custody* executable() { return m_executable.ptr(); }
int number_of_open_file_descriptors() const;
int max_open_file_descriptors() const { return m_max_open_file_descriptors; }
size_t amount_clean_inode() const;
size_t amount_dirty_private() const;
size_t amount_virtual() const;
size_t amount_resident() const;
size_t amount_shared() const;
size_t amount_purgeable_volatile() const;
size_t amount_purgeable_nonvolatile() const;
int exec(String path, Vector<String> arguments, Vector<String> environment, int recusion_depth = 0);
bool is_superuser() const { return m_euid == 0; }
Region* allocate_region_with_vmobject(VirtualAddress, size_t, NonnullRefPtr<VMObject>, size_t offset_in_vmobject, const String& name, int prot);
Region* allocate_region(VirtualAddress, size_t, const String& name, int prot = PROT_READ | PROT_WRITE, bool should_commit = true);
Region* allocate_region_with_vmobject(const Range&, NonnullRefPtr<VMObject>, size_t offset_in_vmobject, const String& name, int prot);
Region* allocate_region(const Range&, const String& name, int prot = PROT_READ | PROT_WRITE, bool should_commit = true);
bool deallocate_region(Region& region);
Region& allocate_split_region(const Region& source_region, const Range&, size_t offset_in_vmobject);
Vector<Region*, 2> split_region_around_range(const Region& source_region, const Range&);
bool is_being_inspected() const { return m_inspector_count; }
void terminate_due_to_signal(u8 signal);
KResult send_signal(u8 signal, Process* sender);
u16 thread_count() const { return m_thread_count; }
Lock& big_lock() { return m_big_lock; }
struct ELFBundle {
OwnPtr<Region> region;
RefPtr<ELF::Loader> elf_loader;
};
OwnPtr<ELFBundle> elf_bundle() const;
int icon_id() const { return m_icon_id; }
u32 priority_boost() const { return m_priority_boost; }
Custody& root_directory();
Custody& root_directory_relative_to_global_root();
void set_root_directory(const Custody&);
bool has_promises() const { return m_promises; }
bool has_promised(Pledge pledge) const { return m_promises & (1u << (u32)pledge); }
VeilState veil_state() const { return m_veil_state; }
const Vector<UnveiledPath>& unveiled_paths() const { return m_unveiled_paths; }
void increment_inspector_count(Badge<ProcessInspectionHandle>) { ++m_inspector_count; }
void decrement_inspector_count(Badge<ProcessInspectionHandle>) { --m_inspector_count; }
void set_wait_for_tracer_at_next_execve(bool val) { m_wait_for_tracer_at_next_execve = val; }
KResultOr<u32> peek_user_data(u32* address);
KResult poke_user_data(u32* address, u32 data);
private:
friend class MemoryManager;
friend class Scheduler;
friend class Region;
Process(Thread*& first_thread, const String& name, uid_t, gid_t, pid_t ppid, RingLevel, RefPtr<Custody> cwd = nullptr, RefPtr<Custody> executable = nullptr, TTY* = nullptr, Process* fork_parent = nullptr);
static pid_t allocate_pid();
Range allocate_range(VirtualAddress, size_t, size_t alignment = PAGE_SIZE);
Region& add_region(NonnullOwnPtr<Region>);
void kill_threads_except_self();
void kill_all_threads();
int do_exec(NonnullRefPtr<FileDescription> main_program_description, Vector<String> arguments, Vector<String> environment, RefPtr<FileDescription> interpreter_description);
ssize_t do_write(FileDescription&, const u8*, int data_size);
KResultOr<NonnullRefPtr<FileDescription>> find_elf_interpreter_for_executable(const String& path, char (&first_page)[PAGE_SIZE], int nread, size_t file_size);
int alloc_fd(int first_candidate_fd = 0);
void disown_all_shared_buffers();
KResult do_kill(Process&, int signal);
KResult do_killpg(pid_t pgrp, int signal);
KResult do_killall(int signal);
KResult do_killself(int signal);
KResultOr<siginfo_t> do_waitid(idtype_t idtype, int id, int options);
KResultOr<String> get_syscall_path_argument(const char* user_path, size_t path_length) const;
KResultOr<String> get_syscall_path_argument(const Syscall::StringArgument&) const;
bool has_tracee_thread(int tracer_pid) const;
RefPtr<PageDirectory> m_page_directory;
Process* m_prev { nullptr };
Process* m_next { nullptr };
String m_name;
pid_t m_pid { 0 };
pid_t m_sid { 0 };
pid_t m_pgid { 0 };
uid_t m_euid { 0 };
gid_t m_egid { 0 };
uid_t m_uid { 0 };
gid_t m_gid { 0 };
uid_t m_suid { 0 };
gid_t m_sgid { 0 };
pid_t m_exec_tid { 0 };
static const int m_max_open_file_descriptors { FD_SETSIZE };
struct FileDescriptionAndFlags {
operator bool() const { return !!description; }
void clear();
void set(NonnullRefPtr<FileDescription>&& d, u32 f = 0);
RefPtr<FileDescription> description;
u32 flags { 0 };
};
Vector<FileDescriptionAndFlags> m_fds;
RingLevel m_ring { Ring0 };
u8 m_termination_status { 0 };
u8 m_termination_signal { 0 };
u16 m_thread_count { 0 };
bool m_dead { false };
bool m_profiling { false };
RefPtr<Custody> m_executable;
RefPtr<Custody> m_cwd;
RefPtr<Custody> m_root_directory;
RefPtr<Custody> m_root_directory_relative_to_global_root;
RefPtr<TTY> m_tty;
Region* region_from_range(const Range&);
Region* region_containing(const Range&);
NonnullOwnPtrVector<Region> m_regions;
struct RegionLookupCache {
Range range;
WeakPtr<Region> region;
};
RegionLookupCache m_region_lookup_cache;
pid_t m_ppid { 0 };
mode_t m_umask { 022 };
FixedArray<gid_t> m_extra_gids;
WeakPtr<Region> m_master_tls_region;
size_t m_master_tls_size { 0 };
size_t m_master_tls_alignment { 0 };
Lock m_big_lock { "Process" };
u64 m_alarm_deadline { 0 };
int m_icon_id { -1 };
u32 m_priority_boost { 0 };
u32 m_promises { 0 };
u32 m_execpromises { 0 };
VeilState m_veil_state { VeilState::None };
Vector<UnveiledPath> m_unveiled_paths;
WaitQueue& futex_queue(i32*);
HashMap<u32, OwnPtr<WaitQueue>> m_futex_queues;
OwnPtr<PerformanceEventBuffer> m_perf_event_buffer;
u32 m_inspector_count { 0 };
// This member is used in the implementation of ptrace's PT_TRACEME flag.
// If it is set to true, the process will stop at the next execve syscall
// and wait for a tracer to attach.
bool m_wait_for_tracer_at_next_execve { false };
};
class ProcessInspectionHandle {
public:
ProcessInspectionHandle(Process& process)
: m_process(process)
{
if (&process != Process::current) {
InterruptDisabler disabler;
m_process.increment_inspector_count({});
}
}
~ProcessInspectionHandle()
{
if (&m_process != Process::current) {
InterruptDisabler disabler;
m_process.decrement_inspector_count({});
}
}
Process& process() { return m_process; }
static OwnPtr<ProcessInspectionHandle> from_pid(pid_t pid)
{
InterruptDisabler disabler;
auto* process = Process::from_pid(pid);
if (process)
return make<ProcessInspectionHandle>(*process);
return nullptr;
}
Process* operator->() { return &m_process; }
Process& operator*() { return m_process; }
private:
Process& m_process;
};
extern InlineLinkedList<Process>* g_processes;
template<typename Callback>
inline void Process::for_each(Callback callback)
{
ASSERT_INTERRUPTS_DISABLED();
for (auto* process = g_processes->head(); process;) {
auto* next_process = process->next();
if (callback(*process) == IterationDecision::Break)
break;
process = next_process;
}
}
template<typename Callback>
inline void Process::for_each_child(Callback callback)
{
ASSERT_INTERRUPTS_DISABLED();
pid_t my_pid = pid();
for (auto* process = g_processes->head(); process;) {
auto* next_process = process->next();
if (process->ppid() == my_pid || process->has_tracee_thread(m_pid)) {
if (callback(*process) == IterationDecision::Break)
break;
}
process = next_process;
}
}
template<typename Callback>
inline void Process::for_each_thread(Callback callback) const
{
InterruptDisabler disabler;
pid_t my_pid = pid();
if (my_pid == 0) {
// NOTE: Special case the colonel process, since its main thread is not in the global thread table.
callback(*g_colonel);
return;
}
Thread::for_each([callback, my_pid](Thread& thread) -> IterationDecision {
if (thread.pid() == my_pid)
return callback(thread);
return IterationDecision::Continue;
});
}
template<typename Callback>
inline void Process::for_each_in_pgrp(pid_t pgid, Callback callback)
{
ASSERT_INTERRUPTS_DISABLED();
for (auto* process = g_processes->head(); process;) {
auto* next_process = process->next();
if (!process->is_dead() && process->pgid() == pgid) {
if (callback(*process) == IterationDecision::Break)
break;
}
process = next_process;
}
}
inline bool InodeMetadata::may_read(const Process& process) const
{
return may_read(process.euid(), process.egid(), process.extra_gids());
}
inline bool InodeMetadata::may_write(const Process& process) const
{
return may_write(process.euid(), process.egid(), process.extra_gids());
}
inline bool InodeMetadata::may_execute(const Process& process) const
{
return may_execute(process.euid(), process.egid(), process.extra_gids());
}
inline int Thread::pid() const
{
return m_process.pid();
}
inline const LogStream& operator<<(const LogStream& stream, const Process& process)
{
return stream << process.name() << '(' << process.pid() << ')';
}
inline u32 Thread::effective_priority() const
{
return m_priority + m_process.priority_boost() + m_priority_boost + m_extra_priority;
}
#define REQUIRE_NO_PROMISES \
do { \
if (Process::current->has_promises()) { \
dbg() << "Has made a promise"; \
cli(); \
Process::current->crash(SIGABRT, 0); \
ASSERT_NOT_REACHED(); \
} \
} while (0)
#define REQUIRE_PROMISE(promise) \
do { \
if (Process::current->has_promises() \
&& !Process::current->has_promised(Pledge::promise)) { \
dbg() << "Has not pledged " << #promise; \
cli(); \
Process::current->crash(SIGABRT, 0); \
ASSERT_NOT_REACHED(); \
} \
} while (0)
}
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