Commit c1d4905c authored by nobody's avatar nobody
Browse files

This commit was manufactured by cvs2svn to create branch 'gdb-4_18-branch'.

Sprout from master 1999-04-16 01:35:26 UTC Stan Shebs <shebs@codesourcery.com> 'Initial creation of sourceware repository'
Cherrypick from FSF 1999-04-16 01:34:55 UTC Stan Shebs <shebs@codesourcery.com> 'Initial creation of sourceware repository':
    readline/CHANGELOG
    readline/CHANGES
    readline/COPYING
    readline/INSTALL
    readline/MANIFEST
    readline/Makefile.in
    readline/README
    readline/acconfig.h
    readline/aclocal.m4
    readline/ansi_stdlib.h
    readline/bind.c
    readline/callback.c
    readline/chardefs.h
    readline/complete.c
    readline/config.h.in
    readline/configure
    readline/configure.in
    readline/display.c
    readline/doc/Makefile.in
    readline/doc/hist.texinfo
    readline/doc/hstech.texinfo
    readline/doc/hsuser.texinfo
    readline/doc/readline.3
    readline/doc/rlman.texinfo
    readline/doc/rltech.texinfo
    readline/doc/rluser.texinfo
    readline/doc/texi2dvi
    readline/doc/texi2html
    readline/emacs_keymap.c
    readline/examples/Inputrc
    readline/examples/Makefile.in
    readline/examples/fileman.c
    readline/examples/histexamp.c
    readline/examples/manexamp.c
    readline/examples/rl.c
    readline/examples/rltest.c
    readline/funmap.c
    readline/histexpand.c
    readline/histfile.c
    readline/histlib.h
    readline/history.c
    readline/history.h
    readline/histsearch.c
    readline/input.c
    readline/isearch.c
    readline/keymaps.c
    readline/keymaps.h
    readline/kill.c
    readline/macro.c
    readline/nls.c
    readline/parens.c
    readline/posixdir.h
    readline/posixjmp.h
    readline/posixstat.h
    readline/readline.c
    readline/readline.h
    readline/rlconf.h
    readline/rldefs.h
    readline/rltty.c
    readline/rltty.h
    readline/rlwinsize.h
    readline/search.c
    readline/shell.c
    readline/signals.c
    readline/support/config.guess
    readline/support/config.sub
    readline/support/install.sh
    readline/support/mkdirs
    readline/support/mkdist
    readline/tcap.h
    readline/terminal.c
    readline/tilde.c
    readline/tilde.h
    readline/undo.c
    readline/util.c
    readline/vi_keymap.c
    readline/vi_mode.c
    readline/xmalloc.c
Delete:
    gdb/windows-nat.c
parent c906108c
/* Target-vector operations for controlling win32 child processes, for GDB.
Copyright 1995, 1996, 1997, 1998 Free Software Foundation, Inc.
Contributed by Cygnus Support.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without eve nthe implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
/* by Steve Chamberlain, sac@cygnus.com */
/* We assume we're being built with and will be used for cygwin. */
#include "defs.h"
#include "frame.h" /* required by inferior.h */
#include "inferior.h"
#include "target.h"
#include "wait.h"
#include "gdbcore.h"
#include "command.h"
#include <signal.h>
#include <sys/types.h>
#include <fcntl.h>
#include <stdlib.h>
#ifdef _MSC_VER
#include "windefs.h"
#else /* other WIN32 compiler */
#include <windows.h>
#endif
#include "buildsym.h"
#include "symfile.h"
#include "objfiles.h"
#include "gdb_string.h"
#include "gdbthread.h"
#include "gdbcmd.h"
#include <sys/param.h>
#include <unistd.h>
/* The string sent by cygwin when it processes a signal.
FIXME: This should be in a cygwin include file. */
#define CYGWIN_SIGNAL_STRING "cygwin: signal"
#define CHECK(x) check (x, __FILE__,__LINE__)
#define DEBUG_EXEC(x) if (debug_exec) printf x
#define DEBUG_EVENTS(x) if (debug_events) printf x
#define DEBUG_MEM(x) if (debug_memory) printf x
#define DEBUG_EXCEPT(x) if (debug_exceptions) printf x
/* Forward declaration */
extern struct target_ops child_ops;
static void child_stop PARAMS ((void));
static int win32_child_thread_alive PARAMS ((int));
static int last_sig = 0; /* Set if a signal was received from the
debugged process */
/* Thread information structure used to track information that is
not available in gdb's thread structure. */
typedef struct thread_info_struct
{
struct thread_info_struct *next;
DWORD id;
HANDLE h;
char *name;
int suspend_count;
CONTEXT context;
} thread_info;
static thread_info thread_head = {NULL};
/* The process and thread handles for the above context. */
static DEBUG_EVENT current_event; /* The current debug event from
WaitForDebugEvent */
static HANDLE current_process_handle; /* Currently executing process */
static thread_info *current_thread; /* Info on currently selected thread */
static DWORD main_thread_id; /* Thread ID of the main thread */
/* Counts of things. */
static int exception_count = 0;
static int event_count = 0;
/* User options. */
static int new_console = 0;
static int new_group = 0;
static int debug_exec = 0; /* show execution */
static int debug_events = 0; /* show events from kernel */
static int debug_memory = 0; /* show target memory accesses */
static int debug_exceptions = 0; /* show target exceptions */
/* This vector maps GDB's idea of a register's number into an address
in the win32 exception context vector.
It also contains the bit mask needed to load the register in question.
One day we could read a reg, we could inspect the context we
already have loaded, if it doesn't have the bit set that we need,
we read that set of registers in using GetThreadContext. If the
context already contains what we need, we just unpack it. Then to
write a register, first we have to ensure that the context contains
the other regs of the group, and then we copy the info in and set
out bit. */
#define context_offset(x) ((int)&(((CONTEXT *)NULL)->x))
static const int mappings[] =
{
context_offset(Eax),
context_offset(Ecx),
context_offset(Edx),
context_offset(Ebx),
context_offset(Esp),
context_offset(Ebp),
context_offset(Esi),
context_offset(Edi),
context_offset(Eip),
context_offset(EFlags),
context_offset(SegCs),
context_offset(SegSs),
context_offset(SegDs),
context_offset(SegEs),
context_offset(SegFs),
context_offset(SegGs),
context_offset(FloatSave.RegisterArea[0 * 10]),
context_offset(FloatSave.RegisterArea[1 * 10]),
context_offset(FloatSave.RegisterArea[2 * 10]),
context_offset(FloatSave.RegisterArea[3 * 10]),
context_offset(FloatSave.RegisterArea[4 * 10]),
context_offset(FloatSave.RegisterArea[5 * 10]),
context_offset(FloatSave.RegisterArea[6 * 10]),
context_offset(FloatSave.RegisterArea[7 * 10]),
};
/* This vector maps the target's idea of an exception (extracted
from the DEBUG_EVENT structure) to GDB's idea. */
struct xlate_exception
{
int them;
enum target_signal us;
};
static const struct xlate_exception
xlate[] =
{
{EXCEPTION_ACCESS_VIOLATION, TARGET_SIGNAL_SEGV},
{STATUS_STACK_OVERFLOW, TARGET_SIGNAL_SEGV},
{EXCEPTION_BREAKPOINT, TARGET_SIGNAL_TRAP},
{DBG_CONTROL_C, TARGET_SIGNAL_INT},
{EXCEPTION_SINGLE_STEP, TARGET_SIGNAL_TRAP},
{-1, -1}};
/* Find a thread record given a thread id.
If get_context then also retrieve the context for this
thread. */
static thread_info *
thread_rec (DWORD id, int get_context)
{
thread_info *th;
for (th = &thread_head; (th = th->next) != NULL; )
if (th->id == id)
{
if (!th->suspend_count && get_context)
{
if (get_context > 0)
th->suspend_count = SuspendThread (th->h) + 1;
else if (get_context < 0)
th->suspend_count = -1;
th->context.ContextFlags = CONTEXT_DEBUGGER;
GetThreadContext (th->h, &th->context);
}
return th;
}
return NULL;
}
/* Add a thread to the thread list */
static thread_info *
child_add_thread(DWORD id, HANDLE h)
{
thread_info *th;
if ((th = thread_rec (id, FALSE)))
return th;
th = (thread_info *) xmalloc (sizeof (*th));
memset(th, 0, sizeof (*th));
th->id = id;
th->h = h;
th->next = thread_head.next;
thread_head.next = th;
add_thread (id);
return th;
}
/* Clear out any old thread list and reintialize it to a
pristine state. */
static void
child_init_thread_list ()
{
thread_info *th = &thread_head;
DEBUG_EVENTS (("gdb: child_init_thread_list\n"));
init_thread_list ();
while (th->next != NULL)
{
thread_info *here = th->next;
th->next = here->next;
(void) CloseHandle (here->h);
free (here);
}
}
/* Delete a thread from the list of threads */
static void
child_delete_thread (DWORD id)
{
thread_info *th;
if (info_verbose)
printf_unfiltered ("[Deleting %s]\n", target_pid_to_str (id));
delete_thread (id);
for (th = &thread_head;
th->next != NULL && th->next->id != id;
th = th->next)
continue;
if (th->next != NULL)
{
thread_info *here = th->next;
th->next = here->next;
CloseHandle (here->h);
free (here);
}
}
static void
check (BOOL ok, const char *file, int line)
{
if (!ok)
printf_filtered ("error return %s:%d was %d\n", file, line, GetLastError ());
}
static void
do_child_fetch_inferior_registers (int r)
{
if (r >= 0)
supply_register (r, ((char *) &current_thread->context) + mappings[r]);
else
{
for (r = 0; r < NUM_REGS; r++)
do_child_fetch_inferior_registers (r);
}
}
static void
child_fetch_inferior_registers (int r)
{
current_thread = thread_rec (inferior_pid, TRUE);
do_child_fetch_inferior_registers (r);
}
static void
do_child_store_inferior_registers (int r)
{
if (r >= 0)
read_register_gen (r, ((char *) &current_thread->context) + mappings[r]);
else
{
for (r = 0; r < NUM_REGS; r++)
do_child_store_inferior_registers (r);
}
}
/* Store a new register value into the current thread context */
static void
child_store_inferior_registers (int r)
{
current_thread = thread_rec (inferior_pid, TRUE);
do_child_store_inferior_registers (r);
}
/* Wait for child to do something. Return pid of child, or -1 in case
of error; store status through argument pointer OURSTATUS. */
static int
handle_load_dll (PTR dummy)
{
LOAD_DLL_DEBUG_INFO * event = &current_event.u.LoadDll;
DWORD dll_name_ptr;
DWORD done;
char dll_buf[MAX_PATH + 1];
char *p, *dll_name = NULL, *dll_basename;
struct objfile *objfile;
MEMORY_BASIC_INFORMATION minfo;
dll_buf[0] = dll_buf[sizeof(dll_buf) - 1] = '\0';
/* The following code attempts to find the name of the dll by reading the
name from the processes memory. Unfortunately it doesn't work right.
Doing this the "right way" for Windows is very difficult. FIXME */
#ifdef DOESNT_WORK
memset (&minfo, 0, sizeof minfo);
if (VirtualQueryEx (current_process_handle, (LPCVOID) event->lpBaseOfDll,
&minfo, sizeof(minfo)) && minfo.BaseAddress) {
DWORD len;
IMAGE_DOS_HEADER *hmm0 = (IMAGE_DOS_HEADER *) minfo.BaseAddress;
HMODULE hmm = (HMODULE) (((DWORD) hmm0) + hmm0->e_lfanew);
if ((len = GetModuleFileName (hmm, dll_buf, MAX_PATH)))
{
dll_name = dll_buf;
dll_name[len] = '\0';
}
}
#endif
/* Attempt to read the name of the dll that was detected.
This is documented to work only when actively debugging
a program. It will not work for attached processes. */
if (dll_name == NULL || *dll_name == '\0')
{
int size = event->fUnicode ? sizeof (WCHAR) : sizeof (char);
int len = 0;
char b[2];
ReadProcessMemory (current_process_handle,
(LPCVOID) event->lpImageName,
(char *) &dll_name_ptr,
sizeof (dll_name_ptr), &done);
/* See if we could read the address of a string, and that the
address isn't null. */
if (done != sizeof (dll_name_ptr) || !dll_name_ptr)
return 1;
do
{
ReadProcessMemory (current_process_handle,
(LPCVOID) (dll_name_ptr + len * size),
&b,
size,
&done);
len++;
}
while ((b[0] != 0 || b[size - 1] != 0) && done == size);
dll_name = alloca (len);
if (event->fUnicode)
{
WCHAR *unicode_dll_name = (WCHAR *) alloca (len * sizeof (WCHAR));
ReadProcessMemory (current_process_handle,
(LPCVOID) dll_name_ptr,
unicode_dll_name,
len * sizeof (WCHAR),
&done);
WideCharToMultiByte (CP_ACP, 0,
unicode_dll_name, len,
dll_name, len, 0, 0);
}
else
{
ReadProcessMemory (current_process_handle,
(LPCVOID) dll_name_ptr,
dll_name,
len,
&done);
}
}
if (!dll_name)
return 1;
while ((p = strchr (dll_name, '\\')))
*p = '/';
/* FIXME!! It would be nice to define one symbol which pointed to the
front of the dll if we can't find any symbols. */
if (!(dll_basename = strrchr(dll_name, '/')))
dll_basename = dll_name;
else
dll_basename++;
ALL_OBJFILES(objfile)
{
char *objfile_basename;
objfile_basename = strrchr(objfile->name, '/');
if (objfile_basename &&
strcmp(dll_basename, objfile_basename + 1) == 0)
{
printf_unfiltered ("%x:%s (symbols previously loaded)\n",
event->lpBaseOfDll, dll_name);
goto out;
}
}
/* The symbols in a dll are offset by 0x1000, which is the
the offset from 0 of the first byte in an image - because
of the file header and the section alignment.
FIXME: Is this the real reason that we need the 0x1000 ? */
printf_unfiltered ("%x:%s", event->lpBaseOfDll, dll_name);
symbol_file_add (dll_name, 0, (int) event->lpBaseOfDll + 0x1000, 0, 0, 0, 0, 1);
printf_unfiltered ("\n");
out:
return 1;
}
/* Handle DEBUG_STRING output from child process.
Cygwin prepends its messages with a "cygwin:". Interpret this as
a Cygwin signal. Otherwise just print the string as a warning. */
static int
handle_output_debug_string (struct target_waitstatus *ourstatus)
{
char *s;
int gotasig = FALSE;
if (!target_read_string
((CORE_ADDR) current_event.u.DebugString.lpDebugStringData, &s, 1024, 0)
|| !s || !*s)
return gotasig;
if (strncmp(s, CYGWIN_SIGNAL_STRING, sizeof(CYGWIN_SIGNAL_STRING) - 1))
{
warning (s);
}
else
{
char *p;
/*last_sig = */strtol(s + sizeof(CYGWIN_SIGNAL_STRING) - 1, &p, 0);
if (gotasig = (ourstatus->value.sig = target_signal_from_host (last_sig)))
ourstatus->kind = TARGET_WAITKIND_STOPPED;
}
free (s);
return gotasig;
}
static int
handle_exception (struct target_waitstatus *ourstatus)
{
int i;
int done = 0;
thread_info *th;
ourstatus->kind = TARGET_WAITKIND_STOPPED;
/* Record the context of the current thread */
th = thread_rec (current_event.dwThreadId, -1);
switch (current_event.u.Exception.ExceptionRecord.ExceptionCode)
{
case EXCEPTION_ACCESS_VIOLATION:
DEBUG_EXCEPT (("gdb: Target exception ACCESS_VIOLATION at 0x%08x\n",
current_event.u.Exception.ExceptionRecord.ExceptionAddress));
ourstatus->value.sig = TARGET_SIGNAL_SEGV;
break;
case STATUS_STACK_OVERFLOW:
DEBUG_EXCEPT (("gdb: Target exception STACK_OVERFLOW at 0x%08x\n",
current_event.u.Exception.ExceptionRecord.ExceptionAddress));
ourstatus->value.sig = TARGET_SIGNAL_SEGV;
break;
case EXCEPTION_BREAKPOINT:
DEBUG_EXCEPT (("gdb: Target exception BREAKPOINT at 0x%08x\n",
current_event.u.Exception.ExceptionRecord.ExceptionAddress));
ourstatus->value.sig = TARGET_SIGNAL_TRAP;
break;
case DBG_CONTROL_C:
DEBUG_EXCEPT (("gdb: Target exception CONTROL_C at 0x%08x\n",
current_event.u.Exception.ExceptionRecord.ExceptionAddress));
ourstatus->value.sig = TARGET_SIGNAL_INT;
/* User typed CTRL-C. Continue with this status */
last_sig = SIGINT; /* FIXME - should check pass state */
break;
case EXCEPTION_SINGLE_STEP:
DEBUG_EXCEPT (("gdb: Target exception SINGLE_STEP at 0x%08x\n",
current_event.u.Exception.ExceptionRecord.ExceptionAddress));
ourstatus->value.sig = TARGET_SIGNAL_TRAP;
break;
default:
/* This may be a structured exception handling exception. In
that case, we want to let the program try to handle it, and
only break if we see the exception a second time. */
if (current_event.u.Exception.dwFirstChance)
return 0;
printf_unfiltered ("gdb: unknown target exception 0x%08x at 0x%08x\n",
current_event.u.Exception.ExceptionRecord.ExceptionCode,
current_event.u.Exception.ExceptionRecord.ExceptionAddress);
ourstatus->value.sig = TARGET_SIGNAL_UNKNOWN;
break;
}
exception_count++;
return 1;
}
/* Resume all artificially suspended threads if we are continuing
execution */
static BOOL
child_continue (DWORD continue_status, int id)
{
int i;
thread_info *th;
BOOL res;
DEBUG_EVENTS (("ContinueDebugEvent (cpid=%d, ctid=%d, DBG_CONTINUE);\n",
current_event.dwProcessId, current_event.dwThreadId));
if (res = ContinueDebugEvent (current_event.dwProcessId,
current_event.dwThreadId,
continue_status))
for (th = &thread_head; (th = th->next) != NULL; )
if (((id == -1) || (id == th->id)) && th->suspend_count)
{
for (i = 0; i < th->suspend_count; i++)
(void) ResumeThread (th->h);
th->suspend_count = 0;
}
return res;
}
static int
child_wait (int pid, struct target_waitstatus *ourstatus)
{
/* We loop when we get a non-standard exception rather than return
with a SPURIOUS because resume can try and step or modify things,
which needs a current_thread->h. But some of these exceptions mark
the birth or death of threads, which mean that the current thread
isn't necessarily what you think it is. */
while (1)
{
DWORD continue_status;
BOOL t = WaitForDebugEvent (&current_event, INFINITE);
char *p;
thread_info *th;
int sig;
event_count++;
continue_status = DBG_CONTINUE;
switch (current_event.dwDebugEventCode)
{
case CREATE_THREAD_DEBUG_EVENT:
DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%x code=%s)\n",
current_event.dwProcessId, current_event.dwThreadId,
"CREATE_THREAD_DEBUG_EVENT"));
/* Record the existence of this thread */
child_add_thread (current_event.dwThreadId,
current_event.u.CreateThread.hThread);
if (info_verbose)
printf_unfiltered ("[New %s]\n",
target_pid_to_str (current_event.dwThreadId));
break;
case EXIT_THREAD_DEBUG_EVENT:
DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n",
current_event.dwProcessId, current_event.dwThreadId,
"EXIT_THREAD_DEBUG_EVENT"));
child_delete_thread (current_event.dwThreadId);
break;
case CREATE_PROCESS_DEBUG_EVENT:
DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n",
current_event.dwProcessId, current_event.dwThreadId,
"CREATE_PROCESS_DEBUG_EVENT"));
current_process_handle = current_event.u.CreateProcessInfo.hProcess;
main_thread_id = inferior_pid = current_event.dwThreadId;
/* Add the main thread */
current_thread = child_add_thread (inferior_pid,
current_event.u.CreateProcessInfo.hThread);
break;
case EXIT_PROCESS_DEBUG_EVENT:
DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n",
current_event.dwProcessId, current_event.dwThreadId,
"EXIT_PROCESS_DEBUG_EVENT"));
ourstatus->kind = TARGET_WAITKIND_EXITED;
ourstatus->value.integer = current_event.u.ExitProcess.dwExitCode;
CloseHandle (current_process_handle);
return current_event.dwProcessId;
break;
case LOAD_DLL_DEBUG_EVENT:
DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n",
current_event.dwProcessId, current_event.dwThreadId,
"LOAD_DLL_DEBUG_EVENT"));
catch_errors (handle_load_dll, NULL, "", RETURN_MASK_ALL);
registers_changed(); /* mark all regs invalid */
break;
case UNLOAD_DLL_DEBUG_EVENT:
DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n",
current_event.dwProcessId, current_event.dwThreadId,
"UNLOAD_DLL_DEBUG_EVENT"));
break; /* FIXME: don't know what to do here */
case EXCEPTION_DEBUG_EVENT:
DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n"