linux-ptrace.c File Reference

#include "common-defs.h"
#include "linux-ptrace.h"
#include "linux-procfs.h"
#include "linux-waitpid.h"
#include "buffer.h"
#include "gdb_wait.h"
#include "gdb_ptrace.h"
#include <sys/procfs.h>

Go to the source code of this file.

Functions
void	linux_ptrace_attach_fail_reason (pid_t pid, struct buffer *buffer)
char *	linux_ptrace_attach_fail_reason_string (ptid_t ptid, int err)
static void	linux_ptrace_test_ret_to_nx (void)
static int	linux_fork_to_function (gdb_byte *child_stack, int(*function)(void *))
static int	linux_grandchild_function (void *child_stack)
static int	linux_child_function (void *child_stack)
static void	linux_test_for_tracesysgood (int child_pid)
static void	linux_test_for_tracefork (int child_pid)
static void	linux_test_for_exitkill (int child_pid)
void	linux_check_ptrace_features (void)
void	linux_enable_event_reporting (pid_t pid, int options)
void	linux_disable_event_reporting (pid_t pid)
static int	ptrace_supports_feature (int ptrace_options)
int	linux_supports_tracefork (void)
int	linux_supports_traceexec (void)
int	linux_supports_traceclone (void)
int	linux_supports_tracevforkdone (void)
int	linux_supports_tracesysgood (void)
void	linux_ptrace_init_warnings (void)
int	linux_ptrace_get_extended_event (int wstat)
int	linux_is_extended_waitstatus (int wstat)
int	linux_wstatus_maybe_breakpoint (int wstat)

Variables
static int	supported_ptrace_options = -1

Function Documentation

linux_check_ptrace_features()

void linux_check_ptrace_features

(

void

)

Definition at line 337 of file linux-ptrace.c.

References _, error(), linux_child_function(), linux_fork_to_function(), linux_test_for_exitkill(), linux_test_for_tracefork(), linux_test_for_tracesysgood(), my_waitpid(), perror_with_name(), ptrace(), PTRACE_TYPE_ARG3, PTRACE_TYPE_ARG4, status, supported_ptrace_options, warning(), and WIFSTOPPED.

Referenced by linux_enable_event_reporting(), and ptrace_supports_feature().

linux_child_function()

static int linux_child_function ( void *  child_stack )

static

Definition at line 317 of file linux-ptrace.c.

References linux_fork_to_function(), linux_grandchild_function(), ptrace(), PTRACE_TYPE_ARG3, and PTRACE_TYPE_ARG4.

Referenced by linux_check_ptrace_features().

linux_disable_event_reporting()

void linux_disable_event_reporting

(

pid_t

pid

)

Definition at line 512 of file linux-ptrace.c.

References pid, ptrace(), PTRACE_SETOPTIONS, and PTRACE_TYPE_ARG3.

Referenced by linux_child_follow_fork().

linux_enable_event_reporting()

void linux_enable_event_reporting	(	pid_t	pid,
		int	options
	)

Definition at line 491 of file linux-ptrace.c.

References linux_check_ptrace_features(), pid, ptrace(), PTRACE_O_TRACECLONE, PTRACE_SETOPTIONS, PTRACE_TYPE_ARG3, PTRACE_TYPE_ARG4, and supported_ptrace_options.

Referenced by linux_init_ptrace(), linux_nat_filter_event(), and wait_lwp().

linux_fork_to_function()

static int linux_fork_to_function ( gdb_byte *  child_stack, int(*)(void *)  function  )

static

Definition at line 264 of file linux-ptrace.c.

References gdb_assert, perror_with_name(), and xmalloc().

Referenced by linux_check_ptrace_features(), and linux_child_function().

linux_grandchild_function()

static int linux_grandchild_function ( void *  child_stack )

static

Definition at line 302 of file linux-ptrace.c.

References xfree().

Referenced by linux_child_function().

linux_is_extended_waitstatus()

int linux_is_extended_waitstatus

(

int

wstat

)

Definition at line 608 of file linux-ptrace.c.

References linux_ptrace_get_extended_event().

Referenced by linux_nat_filter_event(), and wait_lwp().

linux_ptrace_attach_fail_reason()

void linux_ptrace_attach_fail_reason	(	pid_t	pid,
		struct buffer *	buffer
	)

Definition at line 40 of file linux-ptrace.c.

References _, buffer_xml_printf(), linux_proc_get_tracerpid_nowarn(), linux_proc_pid_is_zombie_nowarn(), and pid.

Referenced by linux_nat_attach(), and linux_ptrace_attach_fail_reason_string().

linux_ptrace_attach_fail_reason_string()

char* linux_ptrace_attach_fail_reason_string	(	ptid_t	ptid,
		int	err
	)

Definition at line 59 of file linux-ptrace.c.

References buffer_finish(), buffer_grow_str0, buffer_init(), err, linux_ptrace_attach_fail_reason(), ptid_get_lwp(), safe_strerror(), xfree(), and xstrprintf().

Referenced by attach_proc_task_lwp_callback().

linux_ptrace_get_extended_event()

int linux_ptrace_get_extended_event

(

int

wstat

)

Definition at line 600 of file linux-ptrace.c.

Referenced by linux_handle_extended_wait(), linux_is_extended_waitstatus(), linux_nat_filter_event(), and linux_test_for_tracefork().

linux_ptrace_init_warnings()

void linux_ptrace_init_warnings

(

void

)

Definition at line 586 of file linux-ptrace.c.

References linux_ptrace_test_ret_to_nx().

Referenced by linux_init_ptrace().

linux_ptrace_test_ret_to_nx()

static void linux_ptrace_test_ret_to_nx ( void  )

static

Definition at line 99 of file linux-ptrace.c.

References _, gdb_assert_not_reached, MAP_FAILED, ptrace(), PTRACE_GETREGS, PTRACE_TYPE_ARG3, PTRACE_TYPE_ARG4, safe_strerror(), status, warning(), WIFSIGNALED, WIFSTOPPED, WSTOPSIG, and WTERMSIG.

Referenced by linux_ptrace_init_warnings().

linux_supports_traceclone()

int linux_supports_traceclone

(

void

)

Definition at line 559 of file linux-ptrace.c.

References PTRACE_O_TRACECLONE, and ptrace_supports_feature().

linux_supports_traceexec()

int linux_supports_traceexec

(

void

)

Definition at line 548 of file linux-ptrace.c.

References PTRACE_O_TRACEEXEC, and ptrace_supports_feature().

linux_supports_tracefork()

int linux_supports_tracefork

(

void

)

Definition at line 537 of file linux-ptrace.c.

References PTRACE_O_TRACEFORK, and ptrace_supports_feature().

Referenced by linux_child_follow_fork(), linux_child_insert_exec_catchpoint(), linux_child_insert_fork_catchpoint(), and linux_child_insert_vfork_catchpoint().

linux_supports_tracesysgood()

int linux_supports_tracesysgood

(

void

)

Definition at line 577 of file linux-ptrace.c.

References PTRACE_O_TRACESYSGOOD, and ptrace_supports_feature().

Referenced by linux_child_set_syscall_catchpoint().

linux_supports_tracevforkdone()

int linux_supports_tracevforkdone

(

void

)

Definition at line 568 of file linux-ptrace.c.

References PTRACE_O_TRACEVFORKDONE, and ptrace_supports_feature().

Referenced by linux_child_follow_fork().

linux_test_for_exitkill()

static void linux_test_for_exitkill ( int  child_pid )

static

Definition at line 474 of file linux-ptrace.c.

References ptrace(), PTRACE_O_EXITKILL, PTRACE_SETOPTIONS, PTRACE_TYPE_ARG3, PTRACE_TYPE_ARG4, and supported_ptrace_options.

Referenced by linux_check_ptrace_features().

linux_test_for_tracefork()

static void linux_test_for_tracefork ( int  child_pid )

static

Definition at line 397 of file linux-ptrace.c.

References _, linux_ptrace_get_extended_event(), my_waitpid(), ptrace(), PTRACE_EVENT_FORK, PTRACE_GETEVENTMSG, PTRACE_O_TRACECLONE, PTRACE_O_TRACEEXEC, PTRACE_O_TRACEFORK, PTRACE_O_TRACEVFORK, PTRACE_O_TRACEVFORKDONE, PTRACE_SETOPTIONS, PTRACE_TYPE_ARG3, PTRACE_TYPE_ARG4, status, supported_ptrace_options, warning(), and WIFSTOPPED.

Referenced by linux_check_ptrace_features().

linux_test_for_tracesysgood()

static void linux_test_for_tracesysgood ( int  child_pid )

static

Definition at line 382 of file linux-ptrace.c.

References ptrace(), PTRACE_O_TRACESYSGOOD, PTRACE_SETOPTIONS, PTRACE_TYPE_ARG3, PTRACE_TYPE_ARG4, and supported_ptrace_options.

Referenced by linux_check_ptrace_features().

linux_wstatus_maybe_breakpoint()

int linux_wstatus_maybe_breakpoint

(

int

wstat

)

Definition at line 616 of file linux-ptrace.c.

References WIFSTOPPED, and WSTOPSIG.

Referenced by linux_nat_filter_event().

ptrace_supports_feature()

static int ptrace_supports_feature ( int  ptrace_options )

static

Definition at line 523 of file linux-ptrace.c.

References linux_check_ptrace_features(), and supported_ptrace_options.

Referenced by linux_supports_traceclone(), linux_supports_traceexec(), linux_supports_tracefork(), linux_supports_tracesysgood(), and linux_supports_tracevforkdone().

Variable Documentation

supported_ptrace_options

int supported_ptrace_options = -1

static

Definition at line 33 of file linux-ptrace.c.

Referenced by linux_check_ptrace_features(), linux_enable_event_reporting(), linux_test_for_exitkill(), linux_test_for_tracefork(), linux_test_for_tracesysgood(), and ptrace_supports_feature().