-/* Default child (native) target interface, for GDB when running under
- Unix.
+/* Base/prototype target for default child (native) targets.
- Copyright (C) 1988-2014 Free Software Foundation, Inc.
+ Copyright (C) 1988-2016 Free Software Foundation, Inc.
This file is part of GDB.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
+/* This file provides a common base class/target that all native
+ target implementations extend, by calling inf_child_target to get a
+ new prototype target and then overriding target methods as
+ necessary. */
+
#include "defs.h"
#include "regcache.h"
#include "memattr.h"
#include "symtab.h"
#include "target.h"
#include "inferior.h"
-#include <string.h>
#include <sys/stat.h>
#include "inf-child.h"
-#include "gdb/fileio.h"
+#include "fileio.h"
#include "agent.h"
#include "gdb_wait.h"
#include "filestuff.h"
#include <fcntl.h>
#include <unistd.h>
+/* A pointer to what is returned by inf_child_target. Used by
+ inf_child_open to push the most-derived target in reaction to
+ "target native". */
+static struct target_ops *inf_child_ops = NULL;
+
/* Helper function for child_wait and the derivatives of child_wait.
HOSTSTATUS is the waitstatus from wait() or the equivalent; store our
translation of that in OURSTATUS. */
static void
inf_child_post_attach (struct target_ops *self, int pid)
{
- /* This version of Unix doesn't require a meaningful "post attach"
- operation by a debugger. */
+ /* This target doesn't require a meaningful "post attach" operation
+ by a debugger. */
}
/* Get ready to modify the registers array. On machines which store
{
}
+/* True if the user did "target native". In that case, we won't
+ unpush the child target automatically when the last inferior is
+ gone. */
+static int inf_child_explicitly_opened;
+
+/* See inf-child.h. */
+
+void
+inf_child_open_target (struct target_ops *target, const char *arg,
+ int from_tty)
+{
+ target_preopen (from_tty);
+ push_target (target);
+ inf_child_explicitly_opened = 1;
+ if (from_tty)
+ printf_filtered ("Done. Use the \"run\" command to start a process.\n");
+}
+
+static void
+inf_child_open (const char *arg, int from_tty)
+{
+ inf_child_open_target (inf_child_ops, arg, from_tty);
+}
+
+/* Implement the to_disconnect target_ops method. */
+
+static void
+inf_child_disconnect (struct target_ops *target, const char *args, int from_tty)
+{
+ if (args != NULL)
+ error (_("Argument given to \"disconnect\"."));
+
+ /* This offers to detach/kill current inferiors, and then pops all
+ targets. */
+ target_preopen (from_tty);
+}
+
+/* Implement the to_close target_ops method. */
+
static void
-inf_child_open (char *arg, int from_tty)
+inf_child_close (struct target_ops *target)
{
- error (_("Use the \"run\" command to start a Unix child process."));
+ /* In case we were forcibly closed. */
+ inf_child_explicitly_opened = 0;
+}
+
+void
+inf_child_mourn_inferior (struct target_ops *ops)
+{
+ generic_mourn_inferior ();
+ inf_child_maybe_unpush_target (ops);
+}
+
+/* See inf-child.h. */
+
+void
+inf_child_maybe_unpush_target (struct target_ops *ops)
+{
+ if (!inf_child_explicitly_opened && !have_inferiors ())
+ unpush_target (ops);
}
static void
inf_child_post_startup_inferior (struct target_ops *self, ptid_t ptid)
{
- /* This version of Unix doesn't require a meaningful "post startup
- inferior" operation by a debugger. */
+ /* This target doesn't require a meaningful "post startup inferior"
+ operation by a debugger. */
}
static int
inf_child_follow_fork (struct target_ops *ops, int follow_child,
int detach_fork)
{
- /* This version of Unix doesn't support following fork or vfork
- events. */
+ /* This target doesn't support following fork or vfork events. */
return 0;
}
static char *
inf_child_pid_to_exec_file (struct target_ops *self, int pid)
{
- /* This version of Unix doesn't support translation of a process ID
- to the filename of the executable file. */
+ /* This target doesn't support translation of a process ID to the
+ filename of the executable file. */
return NULL;
}
-
-/* Target file operations. */
+/* Implementation of to_fileio_open. */
-static int
-inf_child_fileio_open_flags_to_host (int fileio_open_flags, int *open_flags_p)
-{
- int open_flags = 0;
-
- if (fileio_open_flags & ~FILEIO_O_SUPPORTED)
- return -1;
-
- if (fileio_open_flags & FILEIO_O_CREAT)
- open_flags |= O_CREAT;
- if (fileio_open_flags & FILEIO_O_EXCL)
- open_flags |= O_EXCL;
- if (fileio_open_flags & FILEIO_O_TRUNC)
- open_flags |= O_TRUNC;
- if (fileio_open_flags & FILEIO_O_APPEND)
- open_flags |= O_APPEND;
- if (fileio_open_flags & FILEIO_O_RDONLY)
- open_flags |= O_RDONLY;
- if (fileio_open_flags & FILEIO_O_WRONLY)
- open_flags |= O_WRONLY;
- if (fileio_open_flags & FILEIO_O_RDWR)
- open_flags |= O_RDWR;
-/* On systems supporting binary and text mode, always open files in
- binary mode. */
-#ifdef O_BINARY
- open_flags |= O_BINARY;
-#endif
-
- *open_flags_p = open_flags;
- return 0;
-}
-
-static int
-inf_child_errno_to_fileio_error (int errnum)
-{
- switch (errnum)
- {
- case EPERM:
- return FILEIO_EPERM;
- case ENOENT:
- return FILEIO_ENOENT;
- case EINTR:
- return FILEIO_EINTR;
- case EIO:
- return FILEIO_EIO;
- case EBADF:
- return FILEIO_EBADF;
- case EACCES:
- return FILEIO_EACCES;
- case EFAULT:
- return FILEIO_EFAULT;
- case EBUSY:
- return FILEIO_EBUSY;
- case EEXIST:
- return FILEIO_EEXIST;
- case ENODEV:
- return FILEIO_ENODEV;
- case ENOTDIR:
- return FILEIO_ENOTDIR;
- case EISDIR:
- return FILEIO_EISDIR;
- case EINVAL:
- return FILEIO_EINVAL;
- case ENFILE:
- return FILEIO_ENFILE;
- case EMFILE:
- return FILEIO_EMFILE;
- case EFBIG:
- return FILEIO_EFBIG;
- case ENOSPC:
- return FILEIO_ENOSPC;
- case ESPIPE:
- return FILEIO_ESPIPE;
- case EROFS:
- return FILEIO_EROFS;
- case ENOSYS:
- return FILEIO_ENOSYS;
- case ENAMETOOLONG:
- return FILEIO_ENAMETOOLONG;
- }
- return FILEIO_EUNKNOWN;
-}
-
-/* Open FILENAME on the target, using FLAGS and MODE. Return a
- target file descriptor, or -1 if an error occurs (and set
- *TARGET_ERRNO). */
static int
inf_child_fileio_open (struct target_ops *self,
- const char *filename, int flags, int mode,
+ struct inferior *inf, const char *filename,
+ int flags, int mode, int warn_if_slow,
int *target_errno)
{
int nat_flags;
+ mode_t nat_mode;
int fd;
- if (inf_child_fileio_open_flags_to_host (flags, &nat_flags) == -1)
+ if (fileio_to_host_openflags (flags, &nat_flags) == -1
+ || fileio_to_host_mode (mode, &nat_mode) == -1)
{
*target_errno = FILEIO_EINVAL;
return -1;
}
- /* We do not need to convert MODE, since the fileio protocol uses
- the standard values. */
- fd = gdb_open_cloexec (filename, nat_flags, mode);
+ fd = gdb_open_cloexec (filename, nat_flags, nat_mode);
if (fd == -1)
- *target_errno = inf_child_errno_to_fileio_error (errno);
+ *target_errno = host_to_fileio_error (errno);
return fd;
}
-/* Write up to LEN bytes from WRITE_BUF to FD on the target.
- Return the number of bytes written, or -1 if an error occurs
- (and set *TARGET_ERRNO). */
+/* Implementation of to_fileio_pwrite. */
+
static int
inf_child_fileio_pwrite (struct target_ops *self,
int fd, const gdb_byte *write_buf, int len,
}
if (ret == -1)
- *target_errno = inf_child_errno_to_fileio_error (errno);
+ *target_errno = host_to_fileio_error (errno);
return ret;
}
-/* Read up to LEN bytes FD on the target into READ_BUF.
- Return the number of bytes read, or -1 if an error occurs
- (and set *TARGET_ERRNO). */
+/* Implementation of to_fileio_pread. */
+
static int
inf_child_fileio_pread (struct target_ops *self,
int fd, gdb_byte *read_buf, int len,
}
if (ret == -1)
- *target_errno = inf_child_errno_to_fileio_error (errno);
+ *target_errno = host_to_fileio_error (errno);
return ret;
}
-/* Close FD on the target. Return 0, or -1 if an error occurs
- (and set *TARGET_ERRNO). */
+/* Implementation of to_fileio_fstat. */
+
+static int
+inf_child_fileio_fstat (struct target_ops *self, int fd,
+ struct stat *sb, int *target_errno)
+{
+ int ret;
+
+ ret = fstat (fd, sb);
+ if (ret == -1)
+ *target_errno = host_to_fileio_error (errno);
+
+ return ret;
+}
+
+/* Implementation of to_fileio_close. */
+
static int
inf_child_fileio_close (struct target_ops *self, int fd, int *target_errno)
{
ret = close (fd);
if (ret == -1)
- *target_errno = inf_child_errno_to_fileio_error (errno);
+ *target_errno = host_to_fileio_error (errno);
return ret;
}
-/* Unlink FILENAME on the target. Return 0, or -1 if an error
- occurs (and set *TARGET_ERRNO). */
+/* Implementation of to_fileio_unlink. */
+
static int
inf_child_fileio_unlink (struct target_ops *self,
- const char *filename, int *target_errno)
+ struct inferior *inf, const char *filename,
+ int *target_errno)
{
int ret;
ret = unlink (filename);
if (ret == -1)
- *target_errno = inf_child_errno_to_fileio_error (errno);
+ *target_errno = host_to_fileio_error (errno);
return ret;
}
-/* Read value of symbolic link FILENAME on the target. Return a
- null-terminated string allocated via xmalloc, or NULL if an error
- occurs (and set *TARGET_ERRNO). */
+/* Implementation of to_fileio_readlink. */
+
static char *
inf_child_fileio_readlink (struct target_ops *self,
- const char *filename, int *target_errno)
+ struct inferior *inf, const char *filename,
+ int *target_errno)
{
/* We support readlink only on systems that also provide a compile-time
maximum path length (PATH_MAX), at least for now. */
-#if defined (HAVE_READLINK) && defined (PATH_MAX)
+#if defined (PATH_MAX)
char buf[PATH_MAX];
int len;
char *ret;
len = readlink (filename, buf, sizeof buf);
if (len < 0)
{
- *target_errno = inf_child_errno_to_fileio_error (errno);
+ *target_errno = host_to_fileio_error (errno);
return NULL;
}
- ret = xmalloc (len + 1);
+ ret = (char *) xmalloc (len + 1);
memcpy (ret, buf, len);
ret[len] = '\0';
return ret;
}
static int
-inf_child_use_agent (int use)
+inf_child_use_agent (struct target_ops *self, int use)
{
if (agent_loaded_p ())
{
}
static int
-inf_child_can_use_agent (void)
+inf_child_can_use_agent (struct target_ops *self)
{
return agent_loaded_p ();
}
+/* Default implementation of the to_can_async_p and
+ to_supports_non_stop methods. */
+
+static int
+return_zero (struct target_ops *ignore)
+{
+ return 0;
+}
+
struct target_ops *
inf_child_target (void)
{
struct target_ops *t = XCNEW (struct target_ops);
- t->to_shortname = "child";
- t->to_longname = "Unix child process";
- t->to_doc = "Unix child process (started by the \"run\" command).";
+ t->to_shortname = "native";
+ t->to_longname = "Native process";
+ t->to_doc = "Native process (started by the \"run\" command).";
t->to_open = inf_child_open;
+ t->to_close = inf_child_close;
+ t->to_disconnect = inf_child_disconnect;
t->to_post_attach = inf_child_post_attach;
t->to_fetch_registers = inf_child_fetch_inferior_registers;
t->to_store_registers = inf_child_store_inferior_registers;
t->to_prepare_to_store = inf_child_prepare_to_store;
t->to_insert_breakpoint = memory_insert_breakpoint;
t->to_remove_breakpoint = memory_remove_breakpoint;
- t->to_terminal_init = terminal_init_inferior;
- t->to_terminal_inferior = terminal_inferior;
- t->to_terminal_ours_for_output = terminal_ours_for_output;
- t->to_terminal_save_ours = terminal_save_ours;
- t->to_terminal_ours = terminal_ours;
+ t->to_terminal_init = child_terminal_init;
+ t->to_terminal_inferior = child_terminal_inferior;
+ t->to_terminal_ours_for_output = child_terminal_ours_for_output;
+ t->to_terminal_ours = child_terminal_ours;
t->to_terminal_info = child_terminal_info;
t->to_post_startup_inferior = inf_child_post_startup_inferior;
t->to_follow_fork = inf_child_follow_fork;
t->to_can_run = inf_child_can_run;
+ /* We must default these because they must be implemented by any
+ target that can run. */
+ t->to_can_async_p = return_zero;
+ t->to_supports_non_stop = return_zero;
t->to_pid_to_exec_file = inf_child_pid_to_exec_file;
t->to_stratum = process_stratum;
t->to_has_all_memory = default_child_has_all_memory;
t->to_fileio_open = inf_child_fileio_open;
t->to_fileio_pwrite = inf_child_fileio_pwrite;
t->to_fileio_pread = inf_child_fileio_pread;
+ t->to_fileio_fstat = inf_child_fileio_fstat;
t->to_fileio_close = inf_child_fileio_close;
t->to_fileio_unlink = inf_child_fileio_unlink;
t->to_fileio_readlink = inf_child_fileio_readlink;
t->to_magic = OPS_MAGIC;
t->to_use_agent = inf_child_use_agent;
t->to_can_use_agent = inf_child_can_use_agent;
+
+ /* Store a pointer so we can push the most-derived target from
+ inf_child_open. */
+ inf_child_ops = t;
+
return t;
}
projects / deliverable / binutils-gdb.git / blobdiff