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procfs.c File Reference
#include "defs.h"
#include "inferior.h"
#include "infrun.h"
#include "target.h"
#include "gdbcore.h"
#include "elf-bfd.h"
#include "gdbcmd.h"
#include "gdbthread.h"
#include "regcache.h"
#include "inf-child.h"
#include "nat/fork-inferior.h"
#include "gdbarch.h"
#include <sys/procfs.h>
#include <sys/fault.h>
#include <sys/syscall.h>
#include "gdbsupport/gdb_wait.h"
#include <signal.h>
#include <ctype.h>
#include "gdb_bfd.h"
#include "auxv.h"
#include "procfs.h"
#include "observable.h"
#include "gdbsupport/scoped_fd.h"
#include "gdbsupport/pathstuff.h"
#include "gdbsupport/buildargv.h"
#include "cli/cli-style.h"
#include <sys/types.h>
#include <dirent.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/stat.h>
#include "proc-utils.h"
#include "gregset.h"

Go to the source code of this file.

Classes

class  procfs_target
 
struct  procinfo
 
struct  procinfo_deleter
 
struct  procfs_corefile_thread_data
 

Macros

#define CTL_PROC_NAME_FMT   "/proc/%d/ctl"
 
#define AS_PROC_NAME_FMT   "/proc/%d/as"
 
#define MAP_PROC_NAME_FMT   "/proc/%d/map"
 
#define STATUS_PROC_NAME_FMT   "/proc/%d/status"
 
#define MAX_PROC_NAME_SIZE   sizeof("/proc/999999/lwp/0123456789/lwpstatus")
 

Typedefs

typedef struct procinfo procinfo
 
typedef std::unique_ptr< procinfo, procinfo_deleterprocinfo_up
 

Enumerations

enum  { FD_CTL , FD_STATUS , FD_AS }
 
enum  { NOKILL , KILL }
 
enum  { FLAG_RESET , FLAG_SET }
 

Functions

static enum target_xfer_status procfs_xfer_memory (gdb_byte *, const gdb_byte *, ULONGEST, ULONGEST, ULONGEST *)
 
static procinfofind_procinfo_or_die (int pid, int tid)
 
static procinfofind_procinfo (int pid, int tid)
 
static procinfocreate_procinfo (int pid, int tid)
 
static void destroy_procinfo (procinfo *p)
 
static void dead_procinfo (procinfo *p, const char *msg, int killp)
 
static int open_procinfo_files (procinfo *p, int which)
 
static void close_procinfo_files (procinfo *p)
 
static int iterate_over_mappings (procinfo *pi, find_memory_region_ftype child_func, void *data, int(*func)(struct prmap *map, find_memory_region_ftype child_func, void *data))
 
static int open_with_retry (const char *pathname, int flags)
 
static void destroy_one_procinfo (procinfo **list, procinfo *pi)
 
static long proc_flags (procinfo *pi)
 
static int proc_why (procinfo *pi)
 
static int proc_what (procinfo *pi)
 
static int proc_set_current_signal (procinfo *pi, int signo)
 
static int proc_get_current_thread (procinfo *pi)
 
static int proc_iterate_over_threads (procinfo *pi, int(*func)(procinfo *, procinfo *, void *), void *ptr)
 
static void proc_resume (procinfo *pi, ptid_t scope_ptid, int step, enum gdb_signal signo)
 
static void proc_warn (procinfo *pi, const char *func, int line)
 
static void proc_error (procinfo *pi, const char *func, int line)
 
static int proc_get_status (procinfo *pi)
 
static int proc_watchpoint_address (procinfo *pi, CORE_ADDR *addr)
 
static int proc_nsysarg (procinfo *pi)
 
static long * proc_sysargs (procinfo *pi)
 
static int proc_modify_flag (procinfo *pi, long flag, long mode)
 
static int proc_set_run_on_last_close (procinfo *pi)
 
static int proc_unset_run_on_last_close (procinfo *pi)
 
static int proc_unset_inherit_on_fork (procinfo *pi)
 
static int proc_set_async (procinfo *pi)
 
static int proc_unset_async (procinfo *pi)
 
static int proc_stop_process (procinfo *pi)
 
static int proc_wait_for_stop (procinfo *pi)
 
static int proc_run_process (procinfo *pi, int step, int signo)
 
static int proc_set_traced_signals (procinfo *pi, sigset_t *sigset)
 
static int proc_set_traced_faults (procinfo *pi, fltset_t *fltset)
 
static int proc_set_traced_sysentry (procinfo *pi, sysset_t *sysset)
 
static int proc_set_traced_sysexit (procinfo *pi, sysset_t *sysset)
 
static int proc_set_held_signals (procinfo *pi, sigset_t *sighold)
 
static sigset_t * proc_get_held_signals (procinfo *pi, sigset_t *save)
 
static sigset_t * proc_get_traced_signals (procinfo *pi, sigset_t *save)
 
static fltset_t * proc_get_traced_faults (procinfo *pi, fltset_t *save)
 
static sysset_t * proc_get_traced_sysentry (procinfo *pi, sysset_t *save)
 
static sysset_t * proc_get_traced_sysexit (procinfo *pi, sysset_t *save)
 
static int proc_clear_current_fault (procinfo *pi)
 
static int proc_clear_current_signal (procinfo *pi)
 
static gdb_gregset_tproc_get_gregs (procinfo *pi)
 
static gdb_fpregset_tproc_get_fpregs (procinfo *pi)
 
static int proc_set_gregs (procinfo *pi)
 
static int proc_set_fpregs (procinfo *pi)
 
static int proc_kill (procinfo *pi, int signo)
 
static int proc_parent_pid (procinfo *pi)
 
static void * procfs_address_to_host_pointer (CORE_ADDR addr)
 
static int proc_set_watchpoint (procinfo *pi, CORE_ADDR addr, int len, int wflags)
 
static int proc_get_nthreads (procinfo *pi)
 
static int proc_delete_dead_threads (procinfo *parent, procinfo *thread, void *ignore)
 
static int proc_update_threads (procinfo *pi)
 
static void do_attach (ptid_t ptid)
 
static void do_detach ()
 
static void proc_trace_syscalls_1 (procinfo *pi, int syscallnum, int entry_or_exit, int mode, int from_tty)
 
static int procfs_debug_inferior (procinfo *pi)
 
static int invalidate_cache (procinfo *parent, procinfo *pi, void *ptr)
 
static void unconditionally_kill_inferior (procinfo *pi)
 
static void procfs_set_exec_trap (void)
 
static void procfs_pre_trace (void)
 
static int procfs_notice_thread (procinfo *pi, procinfo *thread, void *ptr)
 
static int procfs_set_watchpoint (ptid_t ptid, CORE_ADDR addr, int len, int rwflag, int after)
 
static int find_memory_regions_callback (struct prmap *map, find_memory_region_ftype func, void *data)
 
static char * mappingflags (long flags)
 
static int info_mappings_callback (struct prmap *map, find_memory_region_ftype ignore, void *unused)
 
static void info_proc_mappings (procinfo *pi, int summary)
 
static void proc_trace_syscalls (const char *args, int from_tty, int entry_or_exit, int mode)
 
static void proc_trace_sysentry_cmd (const char *args, int from_tty)
 
static void proc_trace_sysexit_cmd (const char *args, int from_tty)
 
static void proc_untrace_sysentry_cmd (const char *args, int from_tty)
 
static void proc_untrace_sysexit_cmd (const char *args, int from_tty)
 
void _initialize_procfs ()
 
ptid_t procfs_first_available (void)
 
static void procfs_do_thread_registers (bfd *obfd, ptid_t ptid, gdb::unique_xmalloc_ptr< char > &note_data, int *note_size, enum gdb_signal stop_signal)
 
static int procfs_corefile_thread_callback (procinfo *pi, procinfo *thread, void *data)
 
static int find_signalled_thread (struct thread_info *info, void *data)
 
static enum gdb_signal find_stop_signal (void)
 

Variables

static procfs_target the_procfs_target
 
static procinfoprocinfo_list
 

Macro Definition Documentation

◆ AS_PROC_NAME_FMT

#define AS_PROC_NAME_FMT   "/proc/%d/as"

Definition at line 223 of file procfs.c.

◆ CTL_PROC_NAME_FMT

#define CTL_PROC_NAME_FMT   "/proc/%d/ctl"

Definition at line 222 of file procfs.c.

◆ MAP_PROC_NAME_FMT

#define MAP_PROC_NAME_FMT   "/proc/%d/map"

Definition at line 224 of file procfs.c.

◆ MAX_PROC_NAME_SIZE

#define MAX_PROC_NAME_SIZE   sizeof("/proc/999999/lwp/0123456789/lwpstatus")

Definition at line 226 of file procfs.c.

Referenced by iterate_over_mappings(), open_procinfo_files(), and proc_update_threads().

◆ STATUS_PROC_NAME_FMT

#define STATUS_PROC_NAME_FMT   "/proc/%d/status"

Definition at line 225 of file procfs.c.

Typedef Documentation

◆ procinfo

typedef struct procinfo procinfo

◆ procinfo_up

typedef std::unique_ptr<procinfo, procinfo_deleter> procinfo_up

Definition at line 551 of file procfs.c.

Enumeration Type Documentation

◆ anonymous enum

anonymous enum
Enumerator
FD_CTL 
FD_STATUS 
FD_AS 

Definition at line 363 of file procfs.c.

◆ anonymous enum

anonymous enum
Enumerator
NOKILL 
KILL 

Definition at line 553 of file procfs.c.

◆ anonymous enum

anonymous enum
Enumerator
FLAG_RESET 
FLAG_SET 

Definition at line 761 of file procfs.c.

Function Documentation

◆ _initialize_procfs()

void _initialize_procfs ( )

◆ close_procinfo_files()

static void close_procinfo_files ( procinfo * p)
static

Definition at line 484 of file procfs.c.

References procinfo::as_fd, procinfo::ctl_fd, and procinfo::status_fd.

Referenced by destroy_one_procinfo(), and invalidate_cache().

◆ create_procinfo()

static procinfo * create_procinfo ( int pid,
int tid )
static

◆ dead_procinfo()

static void dead_procinfo ( procinfo * p,
const char * msg,
int killp )
static

◆ destroy_one_procinfo()

static void destroy_one_procinfo ( procinfo ** list,
procinfo * pi )
static

◆ destroy_procinfo()

static void destroy_procinfo ( procinfo * p)
static

◆ do_attach()

static void do_attach ( ptid_t ptid)
static

◆ do_detach()

static void do_detach ( )
static

◆ find_memory_regions_callback()

static int find_memory_regions_callback ( struct prmap * map,
find_memory_region_ftype func,
void * data )
static

Definition at line 3159 of file procfs.c.

References func.

Referenced by procfs_target::find_memory_regions().

◆ find_procinfo()

static procinfo * find_procinfo ( int pid,
int tid )
static

◆ find_procinfo_or_die()

static procinfo * find_procinfo_or_die ( int pid,
int tid )
static

◆ find_signalled_thread()

static int find_signalled_thread ( struct thread_info * info,
void * data )
static

Definition at line 3549 of file procfs.c.

References inferior_ptid.

Referenced by find_stop_signal().

◆ find_stop_signal()

static enum gdb_signal find_stop_signal ( void )
static

Definition at line 3559 of file procfs.c.

References find_signalled_thread(), and iterate_over_threads().

Referenced by procfs_target::make_corefile_notes().

◆ info_mappings_callback()

static int info_mappings_callback ( struct prmap * map,
find_memory_region_ftype ignore,
void * unused )
static

Definition at line 3220 of file procfs.c.

References gdb_printf(), gdbarch_addr_bit(), mappingflags(), and target_gdbarch().

Referenced by info_proc_mappings().

◆ info_proc_mappings()

static void info_proc_mappings ( procinfo * pi,
int summary )
static

◆ invalidate_cache()

static int invalidate_cache ( procinfo * parent,
procinfo * pi,
void * ptr )
static

◆ iterate_over_mappings()

static int iterate_over_mappings ( procinfo * pi,
find_memory_region_ftype child_func,
void * data,
int(*)(struct prmap *map, find_memory_region_ftype child_func, void *data) func )
static

◆ mappingflags()

static char * mappingflags ( long flags)
static

Definition at line 3196 of file procfs.c.

References flags.

Referenced by info_mappings_callback().

◆ open_procinfo_files()

static int open_procinfo_files ( procinfo * p,
int which )
static

◆ open_with_retry()

static int open_with_retry ( const char * pathname,
int flags )
static

Definition at line 337 of file procfs.c.

References flags, procinfo::pathname, and status.

Referenced by open_procinfo_files().

◆ proc_clear_current_fault()

static int proc_clear_current_fault ( procinfo * pi)
static

Definition at line 1260 of file procfs.c.

References procinfo::ctl_fd, find_procinfo_or_die(), procinfo::pid, and procinfo::tid.

Referenced by do_detach().

◆ proc_clear_current_signal()

static int proc_clear_current_signal ( procinfo * pi)
static

Definition at line 1341 of file procfs.c.

References procinfo::ctl_fd, find_procinfo_or_die(), procinfo::pid, and procinfo::tid.

Referenced by do_detach().

◆ proc_delete_dead_threads()

static int proc_delete_dead_threads ( procinfo * parent,
procinfo * thread,
void * ignore )
static

◆ proc_error()

static void proc_error ( procinfo * pi,
const char * func,
int line )
static

◆ proc_flags()

static long proc_flags ( procinfo * pi)
static

◆ proc_get_current_thread()

static int proc_get_current_thread ( procinfo * pi)
static

◆ proc_get_fpregs()

static gdb_fpregset_t * proc_get_fpregs ( procinfo * pi)
static

◆ proc_get_gregs()

static gdb_gregset_t * proc_get_gregs ( procinfo * pi)
static

◆ proc_get_held_signals()

static sigset_t * proc_get_held_signals ( procinfo * pi,
sigset_t * save )
static

◆ proc_get_nthreads()

static int proc_get_nthreads ( procinfo * pi)
static

◆ proc_get_status()

static int proc_get_status ( procinfo * pi)
static

◆ proc_get_traced_faults()

static fltset_t * proc_get_traced_faults ( procinfo * pi,
fltset_t * save )
static

◆ proc_get_traced_signals()

static sigset_t * proc_get_traced_signals ( procinfo * pi,
sigset_t * save )
static

◆ proc_get_traced_sysentry()

static sysset_t * proc_get_traced_sysentry ( procinfo * pi,
sysset_t * save )
static

◆ proc_get_traced_sysexit()

static sysset_t * proc_get_traced_sysexit ( procinfo * pi,
sysset_t * save )
static

◆ proc_iterate_over_threads()

static int proc_iterate_over_threads ( procinfo * pi,
int(*)(procinfo *, procinfo *, void *) func,
void * ptr )
static

◆ proc_kill()

static int proc_kill ( procinfo * pi,
int signo )
static

Definition at line 1472 of file procfs.c.

References procinfo::ctl_fd, FD_CTL, and open_procinfo_files().

Referenced by unconditionally_kill_inferior().

◆ proc_modify_flag()

static int proc_modify_flag ( procinfo * pi,
long flag,
long mode )
static

◆ proc_nsysarg()

static int proc_nsysarg ( procinfo * pi)
static

Definition at line 724 of file procfs.c.

References proc_get_status(), procinfo::prstatus, and procinfo::status_valid.

Referenced by procfs_target::wait().

◆ proc_parent_pid()

static int proc_parent_pid ( procinfo * pi)
static

◆ proc_resume()

static void proc_resume ( procinfo * pi,
ptid_t scope_ptid,
int step,
enum gdb_signal signo )
static

◆ proc_run_process()

static int proc_run_process ( procinfo * pi,
int step,
int signo )
static

Definition at line 923 of file procfs.c.

References procinfo::ctl_fd, FD_CTL, open_procinfo_files(), and proc_set_current_signal().

Referenced by proc_resume(), and procfs_target::wait().

◆ proc_set_async()

static int proc_set_async ( procinfo * pi)
static

Definition at line 839 of file procfs.c.

References FLAG_SET, and proc_modify_flag().

Referenced by proc_resume().

◆ proc_set_current_signal()

static int proc_set_current_signal ( procinfo * pi,
int signo )
static

◆ proc_set_fpregs()

static int proc_set_fpregs ( procinfo * pi)
static

◆ proc_set_gregs()

static int proc_set_gregs ( procinfo * pi)
static

◆ proc_set_held_signals()

static int proc_set_held_signals ( procinfo * pi,
sigset_t * sighold )
static

◆ proc_set_run_on_last_close()

static int proc_set_run_on_last_close ( procinfo * pi)
static

Definition at line 808 of file procfs.c.

References FLAG_SET, and proc_modify_flag().

Referenced by do_attach(), do_detach(), and procfs_target::procfs_init_inferior().

◆ proc_set_traced_faults()

static int proc_set_traced_faults ( procinfo * pi,
fltset_t * fltset )
static

◆ proc_set_traced_signals()

static int proc_set_traced_signals ( procinfo * pi,
sigset_t * sigset )
static

◆ proc_set_traced_sysentry()

static int proc_set_traced_sysentry ( procinfo * pi,
sysset_t * sysset )
static

◆ proc_set_traced_sysexit()

static int proc_set_traced_sysexit ( procinfo * pi,
sysset_t * sysset )
static

◆ proc_set_watchpoint()

static int proc_set_watchpoint ( procinfo * pi,
CORE_ADDR addr,
int len,
int wflags )
static

Definition at line 1530 of file procfs.c.

References procinfo::ctl_fd, and procfs_address_to_host_pointer().

Referenced by procfs_set_watchpoint().

◆ proc_stop_process()

static int proc_stop_process ( procinfo * pi)
static

Definition at line 858 of file procfs.c.

References procinfo::ctl_fd, FD_CTL, and open_procinfo_files().

Referenced by do_attach().

◆ proc_sysargs()

static long * proc_sysargs ( procinfo * pi)
static

Definition at line 737 of file procfs.c.

References proc_get_status(), procinfo::prstatus, and procinfo::status_valid.

Referenced by procfs_target::wait().

◆ proc_trace_syscalls()

static void proc_trace_syscalls ( const char * args,
int from_tty,
int entry_or_exit,
int mode )
static

◆ proc_trace_syscalls_1()

static void proc_trace_syscalls_1 ( procinfo * pi,
int syscallnum,
int entry_or_exit,
int mode,
int from_tty )
static

◆ proc_trace_sysentry_cmd()

static void proc_trace_sysentry_cmd ( const char * args,
int from_tty )
static

Definition at line 3422 of file procfs.c.

References FLAG_SET, and proc_trace_syscalls().

Referenced by _initialize_procfs().

◆ proc_trace_sysexit_cmd()

static void proc_trace_sysexit_cmd ( const char * args,
int from_tty )
static

Definition at line 3428 of file procfs.c.

References FLAG_SET, and proc_trace_syscalls().

Referenced by _initialize_procfs().

◆ proc_unset_async()

static int proc_unset_async ( procinfo * pi)
static

Definition at line 849 of file procfs.c.

References FLAG_RESET, and proc_modify_flag().

Referenced by procfs_target::wait().

◆ proc_unset_inherit_on_fork()

static int proc_unset_inherit_on_fork ( procinfo * pi)
static

Definition at line 829 of file procfs.c.

References FLAG_RESET, and proc_modify_flag().

Referenced by procfs_set_exec_trap().

◆ proc_unset_run_on_last_close()

static int proc_unset_run_on_last_close ( procinfo * pi)
static

Definition at line 818 of file procfs.c.

References FLAG_RESET, and proc_modify_flag().

Referenced by procfs_set_exec_trap().

◆ proc_untrace_sysentry_cmd()

static void proc_untrace_sysentry_cmd ( const char * args,
int from_tty )
static

Definition at line 3434 of file procfs.c.

References FLAG_RESET, and proc_trace_syscalls().

Referenced by _initialize_procfs().

◆ proc_untrace_sysexit_cmd()

static void proc_untrace_sysexit_cmd ( const char * args,
int from_tty )
static

Definition at line 3440 of file procfs.c.

References FLAG_RESET, and proc_trace_syscalls().

Referenced by _initialize_procfs().

◆ proc_update_threads()

static int proc_update_threads ( procinfo * pi)
static

◆ proc_wait_for_stop()

static int proc_wait_for_stop ( procinfo * pi)
static

◆ proc_warn()

static void proc_warn ( procinfo * pi,
const char * func,
int line )
static

◆ proc_watchpoint_address()

static int proc_watchpoint_address ( procinfo * pi,
CORE_ADDR * addr )
static

◆ proc_what()

static int proc_what ( procinfo * pi)
static

◆ proc_why()

static int proc_why ( procinfo * pi)
static

◆ procfs_address_to_host_pointer()

static void * procfs_address_to_host_pointer ( CORE_ADDR addr)
static

◆ procfs_corefile_thread_callback()

static int procfs_corefile_thread_callback ( procinfo * pi,
procinfo * thread,
void * data )
static

Definition at line 3531 of file procfs.c.

References procinfo::pid, procfs_do_thread_registers(), and procinfo::tid.

Referenced by procfs_target::make_corefile_notes().

◆ procfs_debug_inferior()

static int procfs_debug_inferior ( procinfo * pi)
static

◆ procfs_do_thread_registers()

static void procfs_do_thread_registers ( bfd * obfd,
ptid_t ptid,
gdb::unique_xmalloc_ptr< char > & note_data,
int * note_size,
enum gdb_signal stop_signal )
static

◆ procfs_first_available()

ptid_t procfs_first_available ( void )

Definition at line 3474 of file procfs.c.

References procinfo::pid, and procinfo_list.

Referenced by sol_thread_target::resume(), rw_common(), and sol_thread_target::xfer_partial().

◆ procfs_notice_thread()

static int procfs_notice_thread ( procinfo * pi,
procinfo * thread,
void * ptr )
static

◆ procfs_pre_trace()

static void procfs_pre_trace ( void )
static

Definition at line 2744 of file procfs.c.

Referenced by procfs_target::create_inferior().

◆ procfs_set_exec_trap()

static void procfs_set_exec_trap ( void )
static

◆ procfs_set_watchpoint()

static int procfs_set_watchpoint ( ptid_t ptid,
CORE_ADDR addr,
int len,
int rwflag,
int after )
static

◆ procfs_xfer_memory()

static enum target_xfer_status procfs_xfer_memory ( gdb_byte * readbuf,
const gdb_byte * writebuf,
ULONGEST memaddr,
ULONGEST len,
ULONGEST * xfered_len )
static

◆ unconditionally_kill_inferior()

static void unconditionally_kill_inferior ( procinfo * pi)
static

Definition at line 2547 of file procfs.c.

References destroy_procinfo(), procinfo::pid, proc_error(), proc_kill(), proc_parent_pid(), and status.

Referenced by procfs_target::kill().

Variable Documentation

◆ procinfo_list

procinfo* procinfo_list
static

Definition at line 275 of file procfs.c.

Referenced by create_procinfo(), destroy_procinfo(), find_procinfo(), and procfs_first_available().

◆ the_procfs_target

procfs_target the_procfs_target
static