mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2024-09-20 17:58:18 +03:00
0695ff8282
Note that I'm developing some helper types in the Syscall namespace as I go here. Once I settle on some nice types, I will convert all the other syscalls to use them as well.
527 lines
18 KiB
C++
527 lines
18 KiB
C++
#pragma once
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#include <AK/InlineLinkedList.h>
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#include <AK/NonnullRefPtrVector.h>
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#include <AK/String.h>
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#include <AK/Types.h>
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#include <AK/Vector.h>
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#include <AK/WeakPtr.h>
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#include <AK/Weakable.h>
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#include <Kernel/FileSystem/VirtualFileSystem.h>
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#include <Kernel/Lock.h>
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#include <Kernel/Syscall.h>
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#include <Kernel/TTY/TTY.h>
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#include <Kernel/Thread.h>
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#include <Kernel/UnixTypes.h>
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#include <Kernel/VM/RangeAllocator.h>
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#include <LibC/signal_numbers.h>
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class ELFLoader;
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class FileDescription;
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class KBuffer;
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class PageDirectory;
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class Region;
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class VMObject;
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class ProcessTracer;
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class SharedBuffer;
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timeval kgettimeofday();
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void kgettimeofday(timeval&);
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extern VirtualAddress g_return_to_ring3_from_signal_trampoline;
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class Process : public InlineLinkedListNode<Process>
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, public Weakable<Process> {
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friend class InlineLinkedListNode<Process>;
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friend class Thread;
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public:
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static Process* create_kernel_process(Thread*& first_thread, String&& name, void (*entry)());
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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);
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~Process();
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static Vector<pid_t> all_pids();
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static Vector<Process*> all_processes();
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bool is_profiling() const { return m_profiling; }
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void set_profiling(bool profiling) { m_profiling = profiling; }
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enum RingLevel : u8 {
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Ring0 = 0,
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Ring3 = 3,
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};
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KBuffer backtrace(ProcessInspectionHandle&) const;
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bool is_dead() const { return m_dead; }
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bool is_ring0() const { return m_ring == Ring0; }
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bool is_ring3() const { return m_ring == Ring3; }
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PageDirectory& page_directory() { return *m_page_directory; }
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const PageDirectory& page_directory() const { return *m_page_directory; }
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static Process* from_pid(pid_t);
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static void update_info_page_timestamp(const timeval&);
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const String& name() const { return m_name; }
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pid_t pid() const { return m_pid; }
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pid_t sid() const { return m_sid; }
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pid_t pgid() const { return m_pgid; }
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uid_t uid() const { return m_uid; }
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gid_t gid() const { return m_gid; }
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const HashTable<gid_t>& extra_gids() const { return m_extra_gids; }
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uid_t euid() const { return m_euid; }
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gid_t egid() const { return m_egid; }
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pid_t ppid() const { return m_ppid; }
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mode_t umask() const { return m_umask; }
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bool in_group(gid_t) const;
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RefPtr<FileDescription> file_description(int fd) const;
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int fd_flags(int fd) const;
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template<typename Callback>
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static void for_each(Callback);
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template<typename Callback>
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static void for_each_in_pgrp(pid_t, Callback);
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template<typename Callback>
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void for_each_child(Callback);
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template<typename Callback>
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void for_each_thread(Callback) const;
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void die();
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void finalize();
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int sys$yield();
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int sys$sync();
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int sys$beep();
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int sys$get_process_name(char* buffer, int buffer_size);
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int sys$watch_file(const char* path, size_t path_length);
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int sys$dbgputch(u8);
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int sys$dbgputstr(const u8*, int length);
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int sys$dump_backtrace();
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int sys$gettid();
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int sys$donate(int tid);
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int sys$ftruncate(int fd, off_t);
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pid_t sys$setsid();
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pid_t sys$getsid(pid_t);
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int sys$setpgid(pid_t pid, pid_t pgid);
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pid_t sys$getpgrp();
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pid_t sys$getpgid(pid_t);
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uid_t sys$getuid();
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gid_t sys$getgid();
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uid_t sys$geteuid();
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gid_t sys$getegid();
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pid_t sys$getpid();
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pid_t sys$getppid();
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mode_t sys$umask(mode_t);
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int sys$open(const Syscall::SC_open_params*);
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int sys$openat(const Syscall::SC_openat_params*);
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int sys$close(int fd);
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ssize_t sys$read(int fd, u8*, ssize_t);
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ssize_t sys$write(int fd, const u8*, ssize_t);
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ssize_t sys$writev(int fd, const struct iovec* iov, int iov_count);
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int sys$fstat(int fd, stat*);
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int sys$lstat(const char*, size_t, stat*);
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int sys$stat(const char*, size_t, stat*);
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int sys$lseek(int fd, off_t, int whence);
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int sys$kill(pid_t pid, int sig);
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[[noreturn]] void sys$exit(int status);
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int sys$sigreturn(RegisterDump& registers);
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pid_t sys$waitpid(pid_t, int* wstatus, int options);
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void* sys$mmap(const Syscall::SC_mmap_params*);
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int sys$munmap(void*, size_t size);
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int sys$set_mmap_name(const Syscall::SC_set_mmap_name_params*);
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int sys$mprotect(void*, size_t, int prot);
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int sys$madvise(void*, size_t, int advice);
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int sys$purge(int mode);
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int sys$select(const Syscall::SC_select_params*);
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int sys$poll(pollfd*, int nfds, int timeout);
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ssize_t sys$get_dir_entries(int fd, void*, ssize_t);
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int sys$getcwd(char*, ssize_t);
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int sys$chdir(const char*, size_t);
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int sys$fchdir(int fd);
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int sys$sleep(unsigned seconds);
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int sys$usleep(useconds_t usec);
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int sys$gettimeofday(timeval*);
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int sys$clock_gettime(clockid_t, timespec*);
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int sys$clock_nanosleep(const Syscall::SC_clock_nanosleep_params*);
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int sys$gethostname(char*, ssize_t);
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int sys$uname(utsname*);
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int sys$readlink(const Syscall::SC_readlink_params*);
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int sys$ttyname_r(int fd, char*, ssize_t);
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int sys$ptsname_r(int fd, char*, ssize_t);
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pid_t sys$fork(RegisterDump&);
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int sys$execve(const Syscall::SC_execve_params*);
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int sys$getdtablesize();
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int sys$dup(int oldfd);
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int sys$dup2(int oldfd, int newfd);
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int sys$sigaction(int signum, const sigaction* act, sigaction* old_act);
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int sys$sigprocmask(int how, const sigset_t* set, sigset_t* old_set);
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int sys$sigpending(sigset_t*);
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int sys$getgroups(ssize_t, gid_t*);
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int sys$setgroups(ssize_t, const gid_t*);
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int sys$pipe(int pipefd[2], int flags);
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int sys$killpg(int pgrp, int sig);
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int sys$setgid(gid_t);
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int sys$setuid(uid_t);
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unsigned sys$alarm(unsigned seconds);
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int sys$access(const char* pathname, size_t path_length, int mode);
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int sys$fcntl(int fd, int cmd, u32 extra_arg);
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int sys$ioctl(int fd, unsigned request, unsigned arg);
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int sys$mkdir(const char* pathname, size_t path_length, mode_t mode);
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clock_t sys$times(tms*);
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int sys$utime(const char* pathname, size_t path_length, const struct utimbuf*);
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int sys$link(const char* old_path, const char* new_path);
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int sys$unlink(const char* pathname, size_t path_length);
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int sys$symlink(const char* target, const char* linkpath);
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int sys$rmdir(const char* pathname, size_t path_length);
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int sys$mount(const char* device, const char* mountpoint, const char* fstype);
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int sys$umount(const char* mountpoint, size_t mountpoint_length);
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int sys$chmod(const char* pathname, size_t path_length, mode_t);
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int sys$fchmod(int fd, mode_t);
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int sys$chown(const char* pathname, uid_t, gid_t);
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int sys$fchown(int fd, uid_t, gid_t);
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int sys$socket(int domain, int type, int protocol);
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int sys$bind(int sockfd, const sockaddr* addr, socklen_t);
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int sys$listen(int sockfd, int backlog);
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int sys$accept(int sockfd, sockaddr*, socklen_t*);
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int sys$connect(int sockfd, const sockaddr*, socklen_t);
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ssize_t sys$sendto(const Syscall::SC_sendto_params*);
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ssize_t sys$recvfrom(const Syscall::SC_recvfrom_params*);
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int sys$getsockopt(const Syscall::SC_getsockopt_params*);
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int sys$setsockopt(const Syscall::SC_setsockopt_params*);
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int sys$getsockname(int sockfd, sockaddr* addr, socklen_t* addrlen);
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int sys$getpeername(int sockfd, sockaddr* addr, socklen_t* addrlen);
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int sys$sched_setparam(pid_t pid, const struct sched_param* param);
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int sys$sched_getparam(pid_t pid, struct sched_param* param);
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int sys$create_thread(void* (*)(void*), void* argument, const Syscall::SC_create_thread_params*);
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void sys$exit_thread(void*);
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int sys$join_thread(int tid, void** exit_value);
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int sys$detach_thread(int tid);
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int sys$set_thread_name(int tid, const char* buffer, int buffer_size);
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int sys$get_thread_name(int tid, char* buffer, int buffer_size);
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int sys$rename(const char* oldpath, const char* newpath);
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int sys$systrace(pid_t);
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int sys$mknod(const char* pathname, mode_t, dev_t);
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int sys$create_shared_buffer(int, void** buffer);
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int sys$share_buffer_with(int, pid_t peer_pid);
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int sys$share_buffer_globally(int);
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void* sys$get_shared_buffer(int shared_buffer_id);
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int sys$release_shared_buffer(int shared_buffer_id);
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int sys$seal_shared_buffer(int shared_buffer_id);
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int sys$get_shared_buffer_size(int shared_buffer_id);
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int sys$set_shared_buffer_volatile(int shared_buffer_id, bool);
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int sys$halt();
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int sys$reboot();
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int sys$set_process_icon(int icon_id);
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int sys$realpath(const Syscall::SC_realpath_params*);
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ssize_t sys$getrandom(void*, size_t, unsigned int);
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int sys$setkeymap(const Syscall::SC_setkeymap_params*);
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int sys$module_load(const char* path, size_t path_length);
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int sys$module_unload(const char* name, size_t name_length);
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int sys$profiling_enable(pid_t);
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int sys$profiling_disable(pid_t);
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void* sys$get_kernel_info_page();
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int sys$futex(const Syscall::SC_futex_params*);
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int sys$set_thread_boost(int tid, int amount);
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int sys$set_process_boost(pid_t, int amount);
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static void initialize();
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[[noreturn]] void crash(int signal, u32 eip);
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[[nodiscard]] static int reap(Process&);
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const TTY* tty() const { return m_tty; }
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void set_tty(TTY* tty) { m_tty = tty; }
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size_t region_count() const { return m_regions.size(); }
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const NonnullOwnPtrVector<Region>& regions() const { return m_regions; }
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void dump_regions();
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ProcessTracer* tracer() { return m_tracer.ptr(); }
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ProcessTracer& ensure_tracer();
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u32 m_ticks_in_user { 0 };
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u32 m_ticks_in_kernel { 0 };
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u32 m_ticks_in_user_for_dead_children { 0 };
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u32 m_ticks_in_kernel_for_dead_children { 0 };
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bool validate_read_from_kernel(VirtualAddress, ssize_t) const;
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bool validate_read(const void*, ssize_t) const;
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bool validate_write(void*, ssize_t) const;
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bool validate_read_str(const char* str);
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template<typename T>
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bool validate_read_typed(T* value, size_t count = 1) { return validate_read(value, sizeof(T) * count); }
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template<typename T>
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bool validate_write_typed(T* value, size_t count = 1) { return validate_write(value, sizeof(T) * count); }
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template<typename DataType, typename SizeType>
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bool validate(const Syscall::MutableBufferArgument<DataType, SizeType>&);
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Custody& current_directory();
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Custody* executable() { return m_executable.ptr(); }
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int number_of_open_file_descriptors() const;
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int max_open_file_descriptors() const { return m_max_open_file_descriptors; }
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size_t amount_clean_inode() const;
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size_t amount_dirty_private() const;
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size_t amount_virtual() const;
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size_t amount_resident() const;
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size_t amount_shared() const;
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size_t amount_purgeable_volatile() const;
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size_t amount_purgeable_nonvolatile() const;
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int exec(String path, Vector<String> arguments, Vector<String> environment);
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bool is_superuser() const { return m_euid == 0; }
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Region* allocate_region_with_vmobject(VirtualAddress, size_t, NonnullRefPtr<VMObject>, size_t offset_in_vmobject, const String& name, int prot, bool user_accessible = true);
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Region* allocate_file_backed_region(VirtualAddress, size_t, NonnullRefPtr<Inode>, const String& name, int prot);
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Region* allocate_region(VirtualAddress, size_t, const String& name, int prot = PROT_READ | PROT_WRITE, bool commit = true);
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bool deallocate_region(Region& region);
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Region& allocate_split_region(const Region& source_region, const Range&, size_t offset_in_vmobject);
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Vector<Region*, 2> split_region_around_range(const Region& source_region, const Range&);
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void set_being_inspected(bool b) { m_being_inspected = b; }
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bool is_being_inspected() const { return m_being_inspected; }
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void terminate_due_to_signal(u8 signal);
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void send_signal(u8, Process* sender);
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u16 thread_count() const { return m_thread_count; }
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Thread& any_thread();
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Lock& big_lock() { return m_big_lock; }
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const ELFLoader* elf_loader() const { return m_elf_loader.ptr(); }
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int icon_id() const { return m_icon_id; }
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u32 priority_boost() const { return m_priority_boost; }
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private:
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friend class MemoryManager;
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friend class Scheduler;
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friend class Region;
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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);
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static pid_t allocate_pid();
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Range allocate_range(VirtualAddress, size_t);
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int do_exec(String path, Vector<String> arguments, Vector<String> environment);
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ssize_t do_write(FileDescription&, const u8*, int data_size);
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int alloc_fd(int first_candidate_fd = 0);
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void disown_all_shared_buffers();
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KResultOr<Vector<String>> find_shebang_interpreter_for_executable(const String& executable_path);
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KResult do_kill(Process&, int signal);
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KResult do_killpg(pid_t pgrp, int signal);
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KResultOr<String> get_syscall_path_argument(const char* user_path, size_t path_length);
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RefPtr<PageDirectory> m_page_directory;
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Process* m_prev { nullptr };
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Process* m_next { nullptr };
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String m_name;
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pid_t m_pid { 0 };
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uid_t m_uid { 0 };
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gid_t m_gid { 0 };
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uid_t m_euid { 0 };
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gid_t m_egid { 0 };
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pid_t m_sid { 0 };
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pid_t m_pgid { 0 };
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static const int m_max_open_file_descriptors { FD_SETSIZE };
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struct FileDescriptionAndFlags {
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operator bool() const { return !!description; }
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void clear();
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void set(NonnullRefPtr<FileDescription>&& d, u32 f = 0);
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RefPtr<FileDescription> description;
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u32 flags { 0 };
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};
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Vector<FileDescriptionAndFlags> m_fds;
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RingLevel m_ring { Ring0 };
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u8 m_termination_status { 0 };
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u8 m_termination_signal { 0 };
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u16 m_thread_count { 0 };
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bool m_being_inspected { false };
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bool m_dead { false };
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bool m_profiling { false };
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RefPtr<Custody> m_executable;
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RefPtr<Custody> m_cwd;
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RefPtr<TTY> m_tty;
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Region* region_from_range(const Range&);
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Region* region_containing(const Range&);
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NonnullOwnPtrVector<Region> m_regions;
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pid_t m_ppid { 0 };
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mode_t m_umask { 022 };
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HashTable<gid_t> m_extra_gids;
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RefPtr<ProcessTracer> m_tracer;
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OwnPtr<ELFLoader> m_elf_loader;
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Region* m_master_tls_region { nullptr };
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size_t m_master_tls_size { 0 };
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size_t m_master_tls_alignment { 0 };
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Lock m_big_lock { "Process" };
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u64 m_alarm_deadline { 0 };
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int m_icon_id { -1 };
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u32 m_priority_boost { 0 };
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WaitQueue& futex_queue(i32*);
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HashMap<u32, OwnPtr<WaitQueue>> m_futex_queues;
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};
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class ProcessInspectionHandle {
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public:
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ProcessInspectionHandle(Process& process)
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: m_process(process)
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{
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if (&process != ¤t->process()) {
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ASSERT(!m_process.is_being_inspected());
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m_process.set_being_inspected(true);
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}
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}
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~ProcessInspectionHandle()
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{
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m_process.set_being_inspected(false);
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}
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Process& process() { return m_process; }
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static OwnPtr<ProcessInspectionHandle> from_pid(pid_t pid)
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{
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InterruptDisabler disabler;
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auto* process = Process::from_pid(pid);
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if (process)
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return make<ProcessInspectionHandle>(*process);
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return nullptr;
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}
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Process* operator->() { return &m_process; }
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Process& operator*() { return m_process; }
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private:
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Process& m_process;
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};
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extern InlineLinkedList<Process>* g_processes;
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template<typename Callback>
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inline void Process::for_each(Callback callback)
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{
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ASSERT_INTERRUPTS_DISABLED();
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for (auto* process = g_processes->head(); process;) {
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auto* next_process = process->next();
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if (callback(*process) == IterationDecision::Break)
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break;
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process = next_process;
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}
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}
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template<typename Callback>
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inline void Process::for_each_child(Callback callback)
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{
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ASSERT_INTERRUPTS_DISABLED();
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pid_t my_pid = pid();
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for (auto* process = g_processes->head(); process;) {
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auto* next_process = process->next();
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if (process->ppid() == my_pid) {
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if (callback(*process) == IterationDecision::Break)
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break;
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}
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process = next_process;
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}
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}
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template<typename Callback>
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inline void Process::for_each_thread(Callback callback) const
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{
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InterruptDisabler disabler;
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pid_t my_pid = pid();
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if (my_pid == 0) {
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// NOTE: Special case the colonel process, since its main thread is not in the global thread table.
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callback(*g_colonel);
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return;
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}
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Thread::for_each([callback, my_pid](Thread& thread) -> IterationDecision {
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if (thread.pid() == my_pid)
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return callback(thread);
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return IterationDecision::Continue;
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});
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}
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template<typename Callback>
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inline void Process::for_each_in_pgrp(pid_t pgid, Callback callback)
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{
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ASSERT_INTERRUPTS_DISABLED();
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for (auto* process = g_processes->head(); process;) {
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auto* next_process = process->next();
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if (!process->is_dead() && process->pgid() == pgid) {
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if (callback(*process) == IterationDecision::Break)
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break;
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}
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process = next_process;
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}
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}
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inline bool InodeMetadata::may_read(const Process& process) const
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{
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return may_read(process.euid(), process.egid(), process.extra_gids());
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}
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inline bool InodeMetadata::may_write(const Process& process) const
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{
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return may_write(process.euid(), process.egid(), process.extra_gids());
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}
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inline bool InodeMetadata::may_execute(const Process& process) const
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{
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return may_execute(process.euid(), process.egid(), process.extra_gids());
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}
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inline int Thread::pid() const
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{
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return m_process.pid();
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}
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inline const LogStream& operator<<(const LogStream& stream, const Process& process)
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{
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return stream << process.name() << '(' << process.pid() << ')';
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}
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inline u32 Thread::effective_priority() const
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{
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return m_priority + m_process.priority_boost() + m_priority_boost + m_extra_priority;
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}
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