-/* Copyright (C) 2009-2012 Free Software Foundation, Inc.
+/* Copyright (C) 2009-2017 Free Software Foundation, Inc.
This file is part of GDB.
#include <sys/types.h>
#include "gdb_wait.h"
#include <signal.h>
+#include "filestuff.h"
+#include "common-inferior.h"
+#include "nat/fork-inferior.h"
int using_threads = 1;
+const struct target_desc *lynx_tdesc;
+
+/* Per-process private data. */
+
+struct process_info_private
+{
+ /* The PTID obtained from the last wait performed on this process.
+ Initialized to null_ptid until the first wait is performed. */
+ ptid_t last_wait_event_ptid;
+};
+
/* Print a debug trace on standard output if debug_threads is set. */
static void
static char *
ptrace_request_to_str (int request)
{
+#define CASE(X) case X: return #X
switch (request)
{
- case PTRACE_TRACEME:
- return "PTRACE_TRACEME";
- break;
- case PTRACE_PEEKTEXT:
- return "PTRACE_PEEKTEXT";
- break;
- case PTRACE_PEEKDATA:
- return "PTRACE_PEEKDATA";
- break;
- case PTRACE_PEEKUSER:
- return "PTRACE_PEEKUSER";
- break;
- case PTRACE_POKETEXT:
- return "PTRACE_POKETEXT";
- break;
- case PTRACE_POKEDATA:
- return "PTRACE_POKEDATA";
- break;
- case PTRACE_POKEUSER:
- return "PTRACE_POKEUSER";
- break;
- case PTRACE_CONT:
- return "PTRACE_CONT";
- break;
- case PTRACE_KILL:
- return "PTRACE_KILL";
- break;
- case PTRACE_SINGLESTEP:
- return "PTRACE_SINGLESTEP";
- break;
- case PTRACE_ATTACH:
- return "PTRACE_ATTACH";
- break;
- case PTRACE_DETACH:
- return "PTRACE_DETACH";
- break;
- case PTRACE_GETREGS:
- return "PTRACE_GETREGS";
- break;
- case PTRACE_SETREGS:
- return "PTRACE_SETREGS";
- break;
- case PTRACE_GETFPREGS:
- return "PTRACE_GETFPREGS";
- break;
- case PTRACE_SETFPREGS:
- return "PTRACE_SETFPREGS";
- break;
- case PTRACE_READDATA:
- return "PTRACE_READDATA";
- break;
- case PTRACE_WRITEDATA:
- return "PTRACE_WRITEDATA";
- break;
- case PTRACE_READTEXT:
- return "PTRACE_READTEXT";
- break;
- case PTRACE_WRITETEXT:
- return "PTRACE_WRITETEXT";
- break;
- case PTRACE_GETFPAREGS:
- return "PTRACE_GETFPAREGS";
- break;
- case PTRACE_SETFPAREGS:
- return "PTRACE_SETFPAREGS";
- break;
- case PTRACE_GETWINDOW:
- return "PTRACE_GETWINDOW";
- break;
- case PTRACE_SETWINDOW:
- return "PTRACE_SETWINDOW";
- break;
- case PTRACE_SYSCALL:
- return "PTRACE_SYSCALL";
- break;
- case PTRACE_DUMPCORE:
- return "PTRACE_DUMPCORE";
- break;
- case PTRACE_SETWRBKPT:
- return "PTRACE_SETWRBKPT";
- break;
- case PTRACE_SETACBKPT:
- return "PTRACE_SETACBKPT";
- break;
- case PTRACE_CLRBKPT:
- return "PTRACE_CLRBKPT";
- break;
- case PTRACE_GET_UCODE:
- return "PTRACE_GET_UCODE";
- break;
+ CASE(PTRACE_TRACEME);
+ CASE(PTRACE_PEEKTEXT);
+ CASE(PTRACE_PEEKDATA);
+ CASE(PTRACE_PEEKUSER);
+ CASE(PTRACE_POKETEXT);
+ CASE(PTRACE_POKEDATA);
+ CASE(PTRACE_POKEUSER);
+ CASE(PTRACE_CONT);
+ CASE(PTRACE_KILL);
+ CASE(PTRACE_SINGLESTEP);
+ CASE(PTRACE_ATTACH);
+ CASE(PTRACE_DETACH);
+ CASE(PTRACE_GETREGS);
+ CASE(PTRACE_SETREGS);
+ CASE(PTRACE_GETFPREGS);
+ CASE(PTRACE_SETFPREGS);
+ CASE(PTRACE_READDATA);
+ CASE(PTRACE_WRITEDATA);
+ CASE(PTRACE_READTEXT);
+ CASE(PTRACE_WRITETEXT);
+ CASE(PTRACE_GETFPAREGS);
+ CASE(PTRACE_SETFPAREGS);
+ CASE(PTRACE_GETWINDOW);
+ CASE(PTRACE_SETWINDOW);
+ CASE(PTRACE_SYSCALL);
+ CASE(PTRACE_DUMPCORE);
+ CASE(PTRACE_SETWRBKPT);
+ CASE(PTRACE_SETACBKPT);
+ CASE(PTRACE_CLRBKPT);
+ CASE(PTRACE_GET_UCODE);
#ifdef PT_READ_GPR
- case PT_READ_GPR:
- return "PT_READ_GPR";
- break;
+ CASE(PT_READ_GPR);
#endif
#ifdef PT_WRITE_GPR
- case PT_WRITE_GPR:
- return "PT_WRITE_GPR";
- break;
+ CASE(PT_WRITE_GPR);
#endif
#ifdef PT_READ_FPR
- case PT_READ_FPR:
- return "PT_READ_FPR";
- break;
+ CASE(PT_READ_FPR);
#endif
#ifdef PT_WRITE_FPR
- case PT_WRITE_FPR:
- return "PT_WRITE_FPR";
- break;
+ CASE(PT_WRITE_FPR);
#endif
#ifdef PT_READ_VPR
- case PT_READ_VPR:
- return "PT_READ_VPR";
- break;
+ CASE(PT_READ_VPR);
#endif
#ifdef PT_WRITE_VPR
- case PT_WRITE_VPR:
- return "PT_WRITE_VPR";
- break;
+ CASE(PT_WRITE_VPR);
#endif
#ifdef PTRACE_PEEKUSP
- case PTRACE_PEEKUSP:
- return "PTRACE_PEEKUSP";
- break;
+ CASE(PTRACE_PEEKUSP);
#endif
#ifdef PTRACE_POKEUSP
- case PTRACE_POKEUSP:
- return "PTRACE_POKEUSP";
- break;
+ CASE(PTRACE_POKEUSP);
#endif
- case PTRACE_PEEKTHREAD:
- return "PTRACE_PEEKTHREAD";
- break;
- case PTRACE_THREADUSER:
- return "PTRACE_THREADUSER";
- break;
- case PTRACE_FPREAD:
- return "PTRACE_FPREAD";
- break;
- case PTRACE_FPWRITE:
- return "PTRACE_FPWRITE";
- break;
- case PTRACE_SETSIG:
- return "PTRACE_SETSIG";
- break;
- case PTRACE_CONT_ONE:
- return "PTRACE_CONT_ONE";
- break;
- case PTRACE_KILL_ONE:
- return "PTRACE_KILL_ONE";
- break;
- case PTRACE_SINGLESTEP_ONE:
- return "PTRACE_SINGLESTEP_ONE";
- break;
- case PTRACE_GETLOADINFO:
- return "PTRACE_GETLOADINFO";
- break;
+ CASE(PTRACE_PEEKTHREAD);
+ CASE(PTRACE_THREADUSER);
+ CASE(PTRACE_FPREAD);
+ CASE(PTRACE_FPWRITE);
+ CASE(PTRACE_SETSIG);
+ CASE(PTRACE_CONT_ONE);
+ CASE(PTRACE_KILL_ONE);
+ CASE(PTRACE_SINGLESTEP_ONE);
+ CASE(PTRACE_GETLOADINFO);
+ CASE(PTRACE_GETTRACESIG);
#ifdef PTRACE_GETTHREADLIST
- case PTRACE_GETTHREADLIST:
- return "PTRACE_GETTHREADLIST";
- break;
+ CASE(PTRACE_GETTHREADLIST);
#endif
}
+#undef CASE
+
return "<unknown-request>";
}
return result;
}
+/* Call add_process with the given parameters, and initializes
+ the process' private data. */
+
+static struct process_info *
+lynx_add_process (int pid, int attached)
+{
+ struct process_info *proc;
+
+ proc = add_process (pid, attached);
+ proc->tdesc = lynx_tdesc;
+ proc->priv = XCNEW (struct process_info_private);
+ proc->priv->last_wait_event_ptid = null_ptid;
+
+ return proc;
+}
+
+/* Callback used by fork_inferior to start tracing the inferior. */
+
+static void
+lynx_ptrace_fun ()
+{
+ int pgrp;
+
+ /* Switch child to its own process group so that signals won't
+ directly affect GDBserver. */
+ pgrp = getpid();
+ if (pgrp < 0)
+ trace_start_error_with_name ("pgrp");
+ if (setpgid (0, pgrp) < 0)
+ trace_start_error_with_name ("setpgid");
+ if (ioctl (0, TIOCSPGRP, &pgrp) < 0)
+ trace_start_error_with_name ("ioctl");
+ if (lynx_ptrace (PTRACE_TRACEME, null_ptid, 0, 0, 0) < 0)
+ trace_start_error_with_name ("lynx_ptrace");
+}
+
/* Implement the create_inferior method of the target_ops vector. */
static int
-lynx_create_inferior (char *program, char **allargs)
+lynx_create_inferior (const char *program,
+ const std::vector<char *> &program_args)
{
int pid;
+ std::string str_program_args = stringify_argv (program_args);
lynx_debug ("lynx_create_inferior ()");
- pid = fork ();
- if (pid < 0)
- perror_with_name ("fork");
+ pid = fork_inferior (program,
+ str_program_args.c_str (),
+ get_environ ()->envp (), lynx_ptrace_fun,
+ NULL, NULL, NULL, NULL);
- if (pid == 0)
- {
- int pgrp;
-
- /* Switch child to its own process group so that signals won't
- directly affect gdbserver. */
- pgrp = getpid();
- setpgid (0, pgrp);
- ioctl (0, TIOCSPGRP, &pgrp);
- lynx_ptrace (PTRACE_TRACEME, null_ptid, 0, 0, 0);
- execv (program, allargs);
- fprintf (stderr, "Cannot exec %s: %s.\n", program, strerror (errno));
- fflush (stderr);
- _exit (0177);
- }
+ post_fork_inferior (pid, program);
- add_process (pid, 0);
+ lynx_add_process (pid, 0);
/* Do not add the process thread just yet, as we do not know its tid.
We will add it later, during the wait for the STOP event corresponding
to the lynx_ptrace (PTRACE_TRACEME) call above. */
return pid;
}
+/* Assuming we've just attached to a running inferior whose pid is PID,
+ add all threads running in that process. */
+
+static void
+lynx_add_threads_after_attach (int pid)
+{
+ /* Ugh! There appears to be no way to get the list of threads
+ in the program we just attached to. So get the list by calling
+ the "ps" command. This is only needed now, as we will then
+ keep the thread list up to date thanks to thread creation and
+ exit notifications. */
+ FILE *f;
+ char buf[256];
+ int thread_pid, thread_tid;
+
+ f = popen ("ps atx", "r");
+ if (f == NULL)
+ perror_with_name ("Cannot get thread list");
+
+ while (fgets (buf, sizeof (buf), f) != NULL)
+ if ((sscanf (buf, "%d %d", &thread_pid, &thread_tid) == 2
+ && thread_pid == pid))
+ {
+ ptid_t thread_ptid = lynx_ptid_build (pid, thread_tid);
+
+ if (!find_thread_ptid (thread_ptid))
+ {
+ lynx_debug ("New thread: (pid = %d, tid = %d)",
+ pid, thread_tid);
+ add_thread (thread_ptid, NULL);
+ }
+ }
+
+ pclose (f);
+}
+
/* Implement the attach target_ops method. */
static int
lynx_attach (unsigned long pid)
{
- struct process_info *new_process;
ptid_t ptid = lynx_ptid_build (pid, 0);
if (lynx_ptrace (PTRACE_ATTACH, ptid, 0, 0, 0) != 0)
error ("Cannot attach to process %lu: %s (%d)\n", pid,
strerror (errno), errno);
- new_process = add_process (pid, 1);
- add_thread (ptid, NULL);
+ lynx_add_process (pid, 1);
+ lynx_add_threads_after_attach (pid);
return 0;
}
static void
lynx_resume (struct thread_resume *resume_info, size_t n)
{
- ptid_t inferior_ptid = thread_to_gdb_id (current_inferior);
- /* FIXME: Assume for now that n == 1. */
- const int request = (resume_info[0].kind == resume_step
- ? PTRACE_SINGLESTEP : PTRACE_CONT);
+ ptid_t ptid = resume_info[0].thread;
+ const int request
+ = (resume_info[0].kind == resume_step
+ ? (n == 1 ? PTRACE_SINGLESTEP_ONE : PTRACE_SINGLESTEP)
+ : PTRACE_CONT);
const int signal = resume_info[0].sig;
- int ret;
- regcache_invalidate ();
- ret = lynx_ptrace (request, inferior_ptid, 1, signal, 0);
+ /* If given a minus_one_ptid, then try using the current_process'
+ private->last_wait_event_ptid. On most LynxOS versions,
+ using any of the process' thread works well enough, but
+ LynxOS 178 is a little more sensitive, and triggers some
+ unexpected signals (Eg SIG61) when we resume the inferior
+ using a different thread. */
+ if (ptid_equal (ptid, minus_one_ptid))
+ ptid = current_process()->priv->last_wait_event_ptid;
+
+ /* The ptid might still be minus_one_ptid; this can happen between
+ the moment we create the inferior or attach to a process, and
+ the moment we resume its execution for the first time. It is
+ fine to use the current_thread's ptid in those cases. */
+ if (ptid_equal (ptid, minus_one_ptid))
+ ptid = ptid_of (current_thread);
+
+ regcache_invalidate_pid (ptid_get_pid (ptid));
+
+ errno = 0;
+ lynx_ptrace (request, ptid, 1, signal, 0);
+ if (errno)
+ perror_with_name ("ptrace");
}
/* Resume the execution of the given PTID. */
lynx_resume (&resume_info, 1);
}
-/* Remove all inferiors and associated threads. */
-
-static void
-lynx_clear_inferiors (void)
-{
- /* We do not use private data, so nothing much to do except calling
- clear_inferiors. */
- clear_inferiors ();
-}
-
/* A wrapper around waitpid that handles the various idiosyncrasies
of LynxOS' waitpid. */
ptid_t new_ptid;
if (ptid_equal (ptid, minus_one_ptid))
- pid = lynx_ptid_get_pid (thread_to_gdb_id (current_inferior));
+ pid = lynx_ptid_get_pid (ptid_of (current_thread));
else
pid = BUILDPID (lynx_ptid_get_pid (ptid), lynx_ptid_get_tid (ptid));
ret = lynx_waitpid (pid, &wstat);
new_ptid = lynx_ptid_build (ret, ((union wait *) &wstat)->w_tid);
+ find_process_pid (ret)->priv->last_wait_event_ptid = new_ptid;
/* If this is a new thread, then add it now. The reason why we do
this here instead of when handling new-thread events is because
for non-threaded applications where the new-thread events are not
generated. */
if (!find_thread_ptid (new_ptid))
- add_thread (new_ptid, NULL);
+ {
+ lynx_debug ("New thread: (pid = %d, tid = %d)",
+ lynx_ptid_get_pid (new_ptid), lynx_ptid_get_tid (new_ptid));
+ add_thread (new_ptid, NULL);
+ }
if (WIFSTOPPED (wstat))
{
case SIGNEWTHREAD:
/* We just added the new thread above. No need to do anything
further. Just resume the execution again. */
- lynx_continue (ptid);
+ lynx_continue (new_ptid);
goto retry;
case SIGTHREADEXIT:
remove_thread (find_thread_ptid (new_ptid));
- lynx_continue (ptid);
+ lynx_continue (new_ptid);
goto retry;
}
}
return 0;
}
+/* A callback for find_inferior which removes from the thread list
+ all threads belonging to process PROC. */
+
+static int
+lynx_delete_thread_callback (struct inferior_list_entry *entry, void *proc)
+{
+ struct process_info *process = (struct process_info *) proc;
+
+ if (ptid_get_pid (entry->id) == pid_of (process))
+ {
+ struct thread_info *thr = find_thread_ptid (entry->id);
+
+ remove_thread (thr);
+ }
+
+ return 0;
+}
+
/* Implement the mourn target_ops method. */
static void
lynx_mourn (struct process_info *proc)
{
- lynx_clear_inferiors ();
+ find_inferior (&all_threads, lynx_delete_thread_callback, proc);
+
+ /* Free our private data. */
+ free (proc->priv);
+ proc->priv = NULL;
+
+ remove_process (proc);
}
/* Implement the join target_ops method. */
lynx_fetch_registers (struct regcache *regcache, int regno)
{
struct lynx_regset_info *regset = lynx_target_regsets;
- ptid_t inferior_ptid = thread_to_gdb_id (current_inferior);
+ ptid_t inferior_ptid = ptid_of (current_thread);
lynx_debug ("lynx_fetch_registers (regno = %d)", regno);
lynx_store_registers (struct regcache *regcache, int regno)
{
struct lynx_regset_info *regset = lynx_target_regsets;
- ptid_t inferior_ptid = thread_to_gdb_id (current_inferior);
+ ptid_t inferior_ptid = ptid_of (current_thread);
lynx_debug ("lynx_store_registers (regno = %d)", regno);
int buf;
const int xfer_size = sizeof (buf);
CORE_ADDR addr = memaddr & -(CORE_ADDR) xfer_size;
- ptid_t inferior_ptid = thread_to_gdb_id (current_inferior);
+ ptid_t inferior_ptid = ptid_of (current_thread);
while (addr < memaddr + len)
{
int buf;
const int xfer_size = sizeof (buf);
CORE_ADDR addr = memaddr & -(CORE_ADDR) xfer_size;
- ptid_t inferior_ptid = thread_to_gdb_id (current_inferior);
+ ptid_t inferior_ptid = ptid_of (current_thread);
while (addr < memaddr + len)
{
if (addr + xfer_size > memaddr + len)
truncate = addr + xfer_size - memaddr - len;
if (skip > 0 || truncate > 0)
- /* We need to read the memory at this address in order to preserve
- the data that we are not overwriting. */
- lynx_read_memory (addr, (unsigned char *) &buf, xfer_size);
- if (errno)
- return errno;
+ {
+ /* We need to read the memory at this address in order to preserve
+ the data that we are not overwriting. */
+ lynx_read_memory (addr, (unsigned char *) &buf, xfer_size);
+ if (errno)
+ return errno;
+ }
memcpy ((gdb_byte *) &buf + skip, myaddr + (addr - memaddr) + skip,
xfer_size - skip - truncate);
errno = 0;
static void
lynx_request_interrupt (void)
{
- ptid_t inferior_ptid = thread_to_gdb_id (current_inferior);
+ ptid_t inferior_ptid = ptid_of (get_first_thread ());
kill (lynx_ptid_get_pid (inferior_ptid), SIGINT);
}
static struct target_ops lynx_target_ops = {
lynx_create_inferior,
+ NULL, /* post_create_inferior */
lynx_attach,
lynx_kill,
lynx_detach,
NULL, /* look_up_symbols */
lynx_request_interrupt,
NULL, /* read_auxv */
+ NULL, /* supports_z_point_type */
NULL, /* insert_point */
NULL, /* remove_point */
+ NULL, /* stopped_by_sw_breakpoint */
+ NULL, /* supports_stopped_by_sw_breakpoint */
+ NULL, /* stopped_by_hw_breakpoint */
+ NULL, /* supports_stopped_by_hw_breakpoint */
+ target_can_do_hardware_single_step,
NULL, /* stopped_by_watchpoint */
NULL, /* stopped_data_address */
NULL, /* read_offsets */
NULL, /* async */
NULL, /* start_non_stop */
NULL, /* supports_multi_process */
+ NULL, /* supports_fork_events */
+ NULL, /* supports_vfork_events */
+ NULL, /* supports_exec_events */
+ NULL, /* handle_new_gdb_connection */
NULL, /* handle_monitor_command */
};
projects / deliverable / binutils-gdb.git / blobdiff