/* Machine independent support for Solaris /proc (process file system) for GDB.
- Copyright (C) 1999-2019 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.
int can_use_hw_breakpoint (enum bptype, int, int) override;
bool stopped_data_address (CORE_ADDR *) override;
+
+ void procfs_init_inferior (int pid);
};
static procfs_target the_procfs_target;
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. */
char sinfo[sizeof (siginfo_t)];
} arg;
siginfo_t mysinfo;
+ process_stratum_target *wait_target;
ptid_t wait_ptid;
struct target_waitstatus wait_status;
pi = find_procinfo_or_die (pi->pid, 0);
/* The pointer is just a type alias. */
- get_last_target_status (&wait_ptid, &wait_status);
- if (wait_ptid == inferior_ptid
+ get_last_target_status (&wait_target, &wait_ptid, &wait_status);
+ if (wait_target == &the_procfs_target
+ && wait_ptid == inferior_ptid
&& wait_status.kind == TARGET_WAITKIND_STOPPED
&& wait_status.value.sig == gdb_signal_from_host (signo)
&& proc_get_status (pi)
return (write (pi->ctl_fd, &arg, sizeof (arg)) == sizeof (arg));
}
-#if (defined(__i386__) || defined(__x86_64__)) && defined (sun)
-
-#include <sys/sysi86.h>
-
-/* The KEY is actually the value of the lower 16 bits of the GS
- register for the LWP that we're interested in. Returns the
- matching ssh struct (LDT entry). */
-
-static struct ssd *
-proc_get_LDT_entry (procinfo *pi, int key) /* ARI: editCase function */
-{
- static struct ssd *ldt_entry = NULL;
- char pathname[MAX_PROC_NAME_SIZE];
-
- /* Allocate space for one LDT entry.
- This alloc must persist, because we return a pointer to it. */
- if (ldt_entry == NULL)
- ldt_entry = XNEW (struct ssd);
-
- /* Open the file descriptor for the LDT table. */
- xsnprintf (pathname, sizeof (pathname), "/proc/%d/ldt", pi->pid);
- scoped_fd fd (open_with_retry (pathname, O_RDONLY));
- if (fd.get () < 0)
- {
- proc_warn (pi, "proc_get_LDT_entry (open)", __LINE__);
- return NULL;
- }
-
- /* Now 'read' thru the table, find a match and return it. */
- while (read (fd.get (), ldt_entry, sizeof (struct ssd))
- == sizeof (struct ssd))
- {
- if (ldt_entry->sel == 0
- && ldt_entry->bo == 0
- && ldt_entry->acc1 == 0
- && ldt_entry->acc2 == 0)
- break; /* end of table */
- /* If key matches, return this entry. */
- if (ldt_entry->sel == key)
- return ldt_entry;
- }
- /* Loop ended, match not found. */
- return NULL;
-}
-
-/* Returns the pointer to the LDT entry of PTID. */
-
-struct ssd *
-procfs_find_LDT_entry (ptid_t ptid) /* ARI: editCase function */
-{
- gdb_gregset_t *gregs;
- int key;
- procinfo *pi;
-
- /* Find procinfo for the lwp. */
- pi = find_procinfo (ptid.pid (), ptid.lwp ());
- if (pi == NULL)
- {
- warning (_("procfs_find_LDT_entry: could not find procinfo for %d:%ld."),
- ptid.pid (), ptid.lwp ());
- return NULL;
- }
- /* get its general registers. */
- gregs = proc_get_gregs (pi);
- if (gregs == NULL)
- {
- warning (_("procfs_find_LDT_entry: could not read gregs for %d:%ld."),
- ptid.pid (), ptid.lwp ());
- return NULL;
- }
- /* Now extract the GS register's lower 16 bits. */
- key = (*gregs)[GS] & 0xffff;
-
- /* Find the matching entry and return it. */
- return proc_get_LDT_entry (pi, key);
-}
-
-#endif
-
/* =============== END, non-thread part of /proc "MODULE" =============== */
/* =================== Thread "MODULE" =================== */
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"),
/* Add it to gdb's thread list. */
ptid = ptid_t (pi->pid, lwpid, 0);
- add_thread (ptid);
+ add_thread (&the_procfs_target, ptid);
return ptid;
}
if (print_thread_events)
printf_unfiltered (_("[%s exited]\n"),
target_pid_to_str (retval).c_str ());
- delete_thread (find_thread_ptid (retval));
+ delete_thread (find_thread_ptid (this, retval));
status->kind = TARGET_WAITKIND_SPURIOUS;
return retval;
}
if (!proc_run_process (pi, 0, 0))
proc_error (pi, "target_wait, run_process", __LINE__);
- inf = find_inferior_pid (pi->pid);
+ inf = find_inferior_pid (this, pi->pid);
if (inf->attach_flag)
{
/* Don't call wait: simulate waiting for exit,
temp_ptid = ptid_t (pi->pid, temp_tid, 0);
/* If not in GDB's thread list, add it. */
- if (!in_thread_list (temp_ptid))
- add_thread (temp_ptid);
+ if (!in_thread_list (this, temp_ptid))
+ add_thread (this, temp_ptid);
/* Return to WFI, but tell it to immediately resume. */
status->kind = TARGET_WAITKIND_SPURIOUS;
if (print_thread_events)
printf_unfiltered (_("[%s exited]\n"),
target_pid_to_str (retval).c_str ());
- delete_thread (find_thread_ptid (retval));
+ delete_thread (find_thread_ptid (this, retval));
status->kind = TARGET_WAITKIND_SPURIOUS;
return retval;
}
/* If not in GDB's thread list, add it. */
temp_ptid = ptid_t (pi->pid, temp_tid, 0);
- if (!in_thread_list (temp_ptid))
- add_thread (temp_ptid);
+ if (!in_thread_list (this, temp_ptid))
+ add_thread (this, temp_ptid);
status->kind = TARGET_WAITKIND_STOPPED;
status->value.sig = GDB_SIGNAL_0;
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"));
threads database, add it. */
if (retval.pid () > 0
&& retval != inferior_ptid
- && !in_thread_list (retval))
+ && !in_thread_list (this, retval))
{
/* We have a new thread. We need to add it both to
GDB's list and to our own. If we don't create a
procinfo, resume may be unhappy later. */
- add_thread (retval);
+ add_thread (this, retval);
if (find_procinfo (retval.pid (),
retval.lwp ()) == NULL)
create_procinfo (retval.pid (),
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.
whatever is necessary to make the child ready to be debugged, and
then wait for the child to synchronize. */
-static void
-procfs_init_inferior (struct target_ops *ops, int pid)
+void
+procfs_target::procfs_init_inferior (int pid)
{
procinfo *pi;
int fail;
/* This routine called on the parent side (GDB side)
after GDB forks the inferior. */
- if (!target_is_pushed (ops))
- push_target (ops);
+ if (!target_is_pushed (this))
+ push_target (this);
pi = create_procinfo (pid, 0);
if (pi == NULL)
/* We already have a main thread registered in the thread table at
this point, but it didn't have any lwp info yet. Notify the core
about it. This changes inferior_ptid as well. */
- thread_change_ptid (ptid_t (pid),
- ptid_t (pid, lwpid, 0));
+ thread_change_ptid (this, ptid_t (pid), ptid_t (pid, lwpid, 0));
gdb_startup_inferior (pid, START_INFERIOR_TRAPS_EXPECTED);
}
/* We have something that executes now. We'll be running through
the shell at this point (if startup-with-shell is true), but the
pid shouldn't change. */
- add_thread_silent (ptid_t (pid));
+ add_thread_silent (this, ptid_t (pid));
- procfs_init_inferior (this, pid);
+ procfs_init_inferior (pid);
}
/* An observer for the "inferior_created" event. */
{
ptid_t gdb_threadid = ptid_t (pi->pid, thread->tid, 0);
- thread_info *thr = find_thread_ptid (gdb_threadid);
+ thread_info *thr = find_thread_ptid (&the_procfs_target, gdb_threadid);
if (thr == NULL || thr->state == THREAD_EXITED)
- add_thread (gdb_threadid);
+ add_thread (&the_procfs_target, gdb_threadid);
return 0;
}
proc_trace_syscalls (args, from_tty, PR_SYSEXIT, FLAG_RESET);
}
+void _initialize_procfs ();
void
-_initialize_procfs (void)
+_initialize_procfs ()
{
gdb::observers::inferior_created.attach (procfs_inferior_created);
char *note_data, int *note_size,
enum gdb_signal stop_signal)
{
- struct regcache *regcache = get_thread_regcache (ptid);
+ struct regcache *regcache = get_thread_regcache (&the_procfs_target, ptid);
gdb_gregset_t gregs;
gdb_fpregset_t fpregs;
unsigned long merged_pid;
projects / deliverable / binutils-gdb.git / blobdiff