-/* 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) 1988-2020 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 "agent.h"
-#include "gdb_wait.h"
-#include "filestuff.h"
+#include "gdbsupport/fileio.h"
+#include "gdbsupport/agent.h"
+#include "gdbsupport/gdb_wait.h"
+#include "gdbsupport/filestuff.h"
#include <sys/types.h>
#include <fcntl.h>
#include <unistd.h>
+static const target_info inf_child_target_info = {
+ "native",
+ N_("Native process"),
+ N_("Native process (started by the \"run\" command).")
+};
+
+const target_info &
+inf_child_target::info () const
+{
+ return inf_child_target_info;
+}
+
/* 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. */
}
}
-/* Fetch register REGNUM from the inferior. If REGNUM is -1, do this
- for all registers. */
+inf_child_target::~inf_child_target ()
+{}
-static void
-inf_child_fetch_inferior_registers (struct target_ops *ops,
- struct regcache *regcache, int regnum)
+void
+inf_child_target::post_attach (int pid)
{
- if (regnum == -1)
- {
- for (regnum = 0;
- regnum < gdbarch_num_regs (get_regcache_arch (regcache));
- regnum++)
- regcache_raw_supply (regcache, regnum, NULL);
- }
- else
- regcache_raw_supply (regcache, regnum, NULL);
+ /* This target doesn't require a meaningful "post attach" operation
+ by a debugger. */
}
-/* Store register REGNUM back into the inferior. If REGNUM is -1, do
- this for all registers (including the floating point registers). */
+/* Get ready to modify the registers array. On machines which store
+ individual registers, this doesn't need to do anything. On
+ machines which store all the registers in one fell swoop, this
+ makes sure that registers contains all the registers from the
+ program being debugged. */
-static void
-inf_child_store_inferior_registers (struct target_ops *ops,
- struct regcache *regcache, int regnum)
+void
+inf_child_target::prepare_to_store (struct regcache *regcache)
{
}
-static void
-inf_child_post_attach (struct target_ops *self, int pid)
+bool
+inf_child_target::supports_terminal_ours ()
{
- /* This version of Unix doesn't require a meaningful "post attach"
- operation by a debugger. */
+ return true;
}
-/* Get ready to modify the registers array. On machines which store
- individual registers, this doesn't need to do anything. On
- machines which store all the registers in one fell swoop, this
- makes sure that registers contains all the registers from the
- program being debugged. */
+void
+inf_child_target::terminal_init ()
+{
+ child_terminal_init (this);
+}
-static void
-inf_child_prepare_to_store (struct target_ops *self,
- struct regcache *regcache)
+void
+inf_child_target::terminal_inferior ()
+{
+ child_terminal_inferior (this);
+}
+
+void
+inf_child_target::terminal_save_inferior ()
{
+ child_terminal_save_inferior (this);
}
-static void
-inf_child_open (char *arg, int from_tty)
+void
+inf_child_target::terminal_ours_for_output ()
{
- error (_("Use the \"run\" command to start a Unix child process."));
+ child_terminal_ours_for_output (this);
}
-static void
-inf_child_post_startup_inferior (struct target_ops *self, ptid_t ptid)
+void
+inf_child_target::terminal_ours ()
{
- /* This version of Unix doesn't require a meaningful "post startup
- inferior" operation by a debugger. */
+ child_terminal_ours (this);
}
-static int
-inf_child_follow_fork (struct target_ops *ops, int follow_child,
- int detach_fork)
+void
+inf_child_target::interrupt ()
{
- /* This version of Unix doesn't support following fork or vfork
- events. */
- return 0;
+ child_interrupt (this);
}
-static int
-inf_child_can_run (void)
+void
+inf_child_target::pass_ctrlc ()
{
- return 1;
+ child_pass_ctrlc (this);
}
-static char *
-inf_child_pid_to_exec_file (int pid)
+void
+inf_child_target::terminal_info (const char *args, int from_tty)
{
- /* This version of Unix doesn't support translation of a process ID
- to the filename of the executable file. */
- return NULL;
+ child_terminal_info (this, args, from_tty);
}
+/* 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;
-/* Target file operations. */
+/* See inf-child.h. */
-static int
-inf_child_fileio_open_flags_to_host (int fileio_open_flags, int *open_flags_p)
+void
+inf_child_open_target (const char *arg, int from_tty)
{
- int open_flags = 0;
+ target_ops *target = get_native_target ();
- if (fileio_open_flags & ~FILEIO_O_SUPPORTED)
- return -1;
+ /* There's always only ever one native target, and if we get here,
+ it better be an inf-child target. */
+ gdb_assert (dynamic_cast<inf_child_target *> (target) != NULL);
- 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
+ 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");
+}
+
+/* Implement the to_disconnect target_ops method. */
+
+void
+inf_child_target::disconnect (const char *args, int from_tty)
+{
+ if (args != NULL)
+ error (_("Argument given to \"disconnect\"."));
- *open_flags_p = open_flags;
- return 0;
+ /* This offers to detach/kill current inferiors, and then pops all
+ targets. */
+ target_preopen (from_tty);
}
-static int
-inf_child_errno_to_fileio_error (int errnum)
+/* Implement the to_close target_ops method. */
+
+void
+inf_child_target::close ()
{
- 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;
+ /* In case we were forcibly closed. */
+ inf_child_explicitly_opened = 0;
}
-/* 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 (const char *filename, int flags, int mode,
- int *target_errno)
+void
+inf_child_target::mourn_inferior ()
+{
+ generic_mourn_inferior ();
+ maybe_unpush_target ();
+}
+
+/* See inf-child.h. */
+
+void
+inf_child_target::maybe_unpush_target ()
+{
+ if (!inf_child_explicitly_opened)
+ unpush_target (this);
+}
+
+void
+inf_child_target::post_startup_inferior (ptid_t ptid)
+{
+ /* This target doesn't require a meaningful "post startup inferior"
+ operation by a debugger. */
+}
+
+bool
+inf_child_target::can_run ()
+{
+ return true;
+}
+
+bool
+inf_child_target::can_create_inferior ()
+{
+ return true;
+}
+
+bool
+inf_child_target::can_attach ()
+{
+ return true;
+}
+
+char *
+inf_child_target::pid_to_exec_file (int pid)
+{
+ /* This target doesn't support translation of a process ID to the
+ filename of the executable file. */
+ return NULL;
+}
+
+/* Implementation of to_fileio_open. */
+
+int
+inf_child_target::fileio_open (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). */
-static int
-inf_child_fileio_pwrite (int fd, const gdb_byte *write_buf, int len,
- ULONGEST offset, int *target_errno)
+/* Implementation of to_fileio_pwrite. */
+
+int
+inf_child_target::fileio_pwrite (int fd, const gdb_byte *write_buf, int len,
+ ULONGEST offset, int *target_errno)
{
int ret;
}
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). */
-static int
-inf_child_fileio_pread (int fd, gdb_byte *read_buf, int len,
- ULONGEST offset, int *target_errno)
+/* Implementation of to_fileio_pread. */
+
+int
+inf_child_target::fileio_pread (int fd, gdb_byte *read_buf, int len,
+ ULONGEST offset, int *target_errno)
{
int ret;
}
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). */
-static int
-inf_child_fileio_close (int fd, int *target_errno)
+/* Implementation of to_fileio_fstat. */
+
+int
+inf_child_target::fileio_fstat (int fd, struct stat *sb, int *target_errno)
{
int ret;
- ret = close (fd);
+ ret = fstat (fd, sb);
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). */
-static int
-inf_child_fileio_unlink (const char *filename, int *target_errno)
+/* Implementation of to_fileio_close. */
+
+int
+inf_child_target::fileio_close (int fd, int *target_errno)
+{
+ int ret;
+
+ ret = ::close (fd);
+ if (ret == -1)
+ *target_errno = host_to_fileio_error (errno);
+
+ return ret;
+}
+
+/* Implementation of to_fileio_unlink. */
+
+int
+inf_child_target::fileio_unlink (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). */
-static char *
-inf_child_fileio_readlink (const char *filename, int *target_errno)
+/* Implementation of to_fileio_readlink. */
+
+gdb::optional<std::string>
+inf_child_target::fileio_readlink (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);
- return NULL;
+ *target_errno = host_to_fileio_error (errno);
+ return {};
}
- ret = xmalloc (len + 1);
- memcpy (ret, buf, len);
- ret[len] = '\0';
- return ret;
+ return std::string (buf, len);
#else
*target_errno = FILEIO_ENOSYS;
- return NULL;
+ return {};
#endif
}
-static int
-inf_child_use_agent (int use)
+bool
+inf_child_target::use_agent (bool use)
{
if (agent_loaded_p ())
{
- use_agent = use;
- return 1;
+ ::use_agent = use;
+ return true;
}
else
- return 0;
+ return false;
}
-static int
-inf_child_can_use_agent (void)
+bool
+inf_child_target::can_use_agent ()
{
return agent_loaded_p ();
}
-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_open = inf_child_open;
- 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_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;
- 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_has_memory = default_child_has_memory;
- t->to_has_stack = default_child_has_stack;
- t->to_has_registers = default_child_has_registers;
- t->to_has_execution = default_child_has_execution;
- 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_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;
- return t;
+/* See inf-child.h. */
+
+void
+add_inf_child_target (inf_child_target *target)
+{
+ set_native_target (target);
+ add_target (inf_child_target_info, inf_child_open_target);
}
projects / deliverable / binutils-gdb.git / blobdiff