/* Machine independent support for Solaris /proc (process file system) for GDB.
- Copyright (C) 1999-2018 Free Software Foundation, Inc.
+ Copyright (C) 1999-2020 Free Software Foundation, Inc.
Written by Michael Snyder at Cygnus Solutions.
Based on work by Fred Fish, Stu Grossman, Geoff Noer, and others.
#include "regcache.h"
#include "inf-child.h"
#include "nat/fork-inferior.h"
-#include "filestuff.h"
+#include "gdbarch.h"
#define _STRUCTURED_PROC 1 /* Should be done by configure script. */
#include <sys/procfs.h>
#include <sys/fault.h>
#include <sys/syscall.h>
-#include "gdb_wait.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 "common/scoped_fd.h"
+#include "gdbsupport/scoped_fd.h"
+#include "gdbsupport/pathstuff.h"
/* This module provides the interface between GDB and the
/proc file system, which is used on many versions of Unix
ULONGEST offset, ULONGEST len,
ULONGEST *xfered_len) override;
- void pass_signals (int, unsigned char *) override;
+ void pass_signals (gdb::array_view<const unsigned char>) override;
void files_info () override;
bool thread_alive (ptid_t ptid) override;
- const char *pid_to_str (ptid_t) override;
+ std::string pid_to_str (ptid_t) override;
char *pid_to_exec_file (int pid) override;
several. Here is some rationale:
There are several file descriptors that may need to be open
- for any given process or LWP. The ones we're intereted in are:
+ for any given process or LWP. The ones we're interested in are:
- control (ctl) write-only change the state
- status (status) read-only query the state
- address space (as) read/write access memory
}
/* Reset inherit_on_fork flag. If the process forks a child while we
- are registered for events in the parent, then we will NOT recieve
+ are registered for events in the parent, then we will NOT receive
events from the child. Returns non-zero for success, zero for
failure. */
procfs_ctl_t cmd = PCWSTOP;
+ set_sigint_trap ();
+
win = (write (pi->ctl_fd, (char *) &cmd, sizeof (cmd)) == sizeof (cmd));
+
+ clear_sigint_trap ();
+
/* We been runnin' and we stopped -- need to update status. */
pi->status_valid = 0;
void
procfs_target::attach (const char *args, int from_tty)
{
- char *exec_file;
int pid;
pid = parse_pid_to_attach (args);
if (from_tty)
{
- exec_file = get_exec_file (0);
+ const char *exec_file = get_exec_file (0);
if (exec_file)
printf_filtered (_("Attaching to program `%s', %s\n"),
- exec_file, target_pid_to_str (ptid_t (pid)));
+ exec_file, target_pid_to_str (ptid_t (pid)).c_str ());
else
printf_filtered (_("Attaching to %s\n"),
- target_pid_to_str (ptid_t (pid)));
+ target_pid_to_str (ptid_t (pid)).c_str ());
fflush (stdout);
}
exec_file = "";
printf_filtered (_("Detaching from program: %s, %s\n"), exec_file,
- target_pid_to_str (ptid_t (pid)));
- gdb_flush (gdb_stdout);
+ target_pid_to_str (ptid_t (pid)).c_str ());
}
do_detach ();
if (pi == NULL)
error (_("procfs: fetch_registers failed to find procinfo for %s"),
- target_pid_to_str (ptid));
+ target_pid_to_str (ptid).c_str ());
gregs = proc_get_gregs (pi);
if (gregs == NULL)
if (pi == NULL)
error (_("procfs: store_registers: failed to find procinfo for %s"),
- target_pid_to_str (ptid));
+ target_pid_to_str (ptid).c_str ());
gregs = proc_get_gregs (pi);
if (gregs == NULL)
{
if (print_thread_events)
printf_unfiltered (_("[%s exited]\n"),
- target_pid_to_str (retval));
+ target_pid_to_str (retval).c_str ());
delete_thread (find_thread_ptid (retval));
status->kind = TARGET_WAITKIND_SPURIOUS;
return retval;
{
if (print_thread_events)
printf_unfiltered (_("[%s exited]\n"),
- target_pid_to_str (retval));
+ target_pid_to_str (retval).c_str ());
delete_thread (find_thread_ptid (retval));
status->kind = TARGET_WAITKIND_SPURIOUS;
return retval;
wstat = (what << 8) | 0177;
break;
case PR_FAULTED:
- switch (what) {
- case FLTWATCH:
- wstat = (SIGTRAP << 8) | 0177;
- break;
- /* FIXME: use si_signo where possible. */
- case FLTPRIV:
- case FLTILL:
- wstat = (SIGILL << 8) | 0177;
- break;
- case FLTBPT:
- case FLTTRACE:
- wstat = (SIGTRAP << 8) | 0177;
- break;
- case FLTSTACK:
- case FLTACCESS:
- case FLTBOUNDS:
- wstat = (SIGSEGV << 8) | 0177;
- break;
- case FLTIOVF:
- case FLTIZDIV:
- case FLTFPE:
- wstat = (SIGFPE << 8) | 0177;
- break;
- case FLTPAGE: /* Recoverable page fault */
- default: /* FIXME: use si_signo if possible for
- fault. */
- retval = ptid_t (-1);
- printf_filtered ("procfs:%d -- ", __LINE__);
- printf_filtered (_("child stopped for unknown reason:\n"));
- proc_prettyprint_why (why, what, 1);
- error (_("... giving up..."));
- break;
+ {
+ int signo = pi->prstatus.pr_lwp.pr_info.si_signo;
+ if (signo != 0)
+ wstat = (signo << 8) | 0177;
}
- break; /* case PR_FAULTED: */
+ break;
default: /* switch (why) unmatched */
printf_filtered ("procfs:%d -- ", __LINE__);
printf_filtered (_("child stopped for unknown reason:\n"));
File descriptors are also cached. As they are a limited resource,
we cannot hold onto them indefinitely. However, as they are
expensive to open, we don't want to throw them away
- indescriminately either. As a compromise, we will keep the file
+ indiscriminately either. As a compromise, we will keep the file
descriptors for the parent process, but discard any file
descriptors we may have accumulated for the threads.
/* Set up to trace signals in the child process. */
void
-procfs_target::pass_signals (int numsigs, unsigned char *pass_signals)
+procfs_target::pass_signals (gdb::array_view<const unsigned char> pass_signals)
{
sigset_t signals;
procinfo *pi = find_procinfo_or_die (inferior_ptid.pid (), 0);
for (signo = 0; signo < NSIG; signo++)
{
int target_signo = gdb_signal_from_host (signo);
- if (target_signo < numsigs && pass_signals[target_signo])
+ if (target_signo < pass_signals.size () && pass_signals[target_signo])
prdelset (&signals, signo);
}
printf_filtered (_("\tUsing the running image of %s %s via /proc.\n"),
inf->attach_flag? "attached": "child",
- target_pid_to_str (inferior_ptid));
+ target_pid_to_str (inferior_ptid).c_str ());
}
/* Make it die. Wait for it to die. Clean up after it. Note: this
{
ptid_t gdb_threadid = ptid_t (pi->pid, thread->tid, 0);
- if (!in_thread_list (gdb_threadid) || is_exited (gdb_threadid))
+ thread_info *thr = find_thread_ptid (gdb_threadid);
+ if (thr == NULL || thr->state == THREAD_EXITED)
add_thread (gdb_threadid);
return 0;
return true;
}
-/* Convert PTID to a string. Returns the string in a static
- buffer. */
+/* Convert PTID to a string. */
-const char *
+std::string
procfs_target::pid_to_str (ptid_t ptid)
{
- static char buf[80];
-
if (ptid.lwp () == 0)
- xsnprintf (buf, sizeof (buf), "process %d", ptid.pid ());
+ return string_printf ("process %d", ptid.pid ());
else
- xsnprintf (buf, sizeof (buf), "LWP %ld", ptid.lwp ());
-
- return buf;
+ return string_printf ("LWP %ld", ptid.lwp ());
}
/* Accepts an integer PID; Returns a string representing a file that
projects / deliverable / binutils-gdb.git / blobdiff