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* wince-stub.c (FREE): New macro.

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(mempool): Just free any buffer prior to reuse.  Don't bother with realloc.
(flag_single_step): New function.
(skip_message): Detect "helpful" Windows CE messages and skip sending them to
the host.
(wait_for_debug_event): Use skip_message to avoid sending debug messages to the
host.
(dispatch): Prelimary implementation of single step detection.
* wince.c: Rework SH single stepping code to be more consistent with other
wince targets.
(handle_output_debug_string): Allow first chance exceptions to come through
since they seem to be all that we get on some versions of Windows CE.
(check_for_step): New function, conditionally compiled based on target.
(regptr): Delete obsolete function.
(handle_exception): Detect illegal instructions.
(get_child_debug_event): Return success only if event code matches target.
(child_create_inferior): Reflect change to get_child_debug_event arguments.
This commit is contained in:
Christopher Faylor
2000-04-21 03:04:35 +00:00
parent 8a892701f5
commit 61c37cee5d
4 changed files with 427 additions and 336 deletions
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137
gdb/wince-stub.c
View File

@@ -28,12 +28,13 @@
#include <winsock.h>
#include "wince-stub.h"
#define MALLOC(n) (void *) LocalAlloc (LMEM_MOVEABLE, (UINT)(n))
#define MALLOC(n) (void *) LocalAlloc (LMEM_MOVEABLE | LMEM_ZEROINIT, (UINT)(n))
#define REALLOC(s, n) (void *) LocalReAlloc ((HLOCAL)(s), (UINT)(n), LMEM_MOVEABLE)
#define FREE(s) LocalFree ((HLOCAL)(s))
static int skip_next_id = 0; /* Don't read next API code from socket */
/* v-style interface for handling varying argyment list error messages.
/* v-style interface for handling varying argument list error messages.
Displays the error message in a dialog box and exits when user clicks
on OK. */
static void
@@ -56,6 +57,27 @@ stub_error (LPCWSTR fmt, ...)
vstub_error (fmt, args);
}
/* Allocate a limited pool of memory, reallocating over unused
buffers. This assumes that there will never be more than four
"buffers" required which, so far, is a safe assumption. */
static LPVOID
mempool (unsigned int len)
{
static int outn = -1;
static LPWSTR outs[4] = {NULL, NULL, NULL, NULL};
if (++outn >= (sizeof (outs) / sizeof (outs[0])))
outn = 0;
/* Allocate space for the converted string, reusing any previously allocated
space, if applicable. */
if (outs[outn])
FREE (outs[outn]);
outs[outn] = (LPWSTR) MALLOC (len);
return outs[outn];
}
/* Standard "oh well" can't communicate error. Someday this might attempt
synchronization. */
static void
@@ -88,28 +110,6 @@ sockwrite (LPCWSTR huh, int s, const void *str, size_t n)
}
}
/* Allocate a limited pool of memory, reallocating over unused
buffers. This assumes that there will never be more than four
"buffers" required which, so far, is a safe assumption. */
static LPVOID
mempool (gdb_wince_len len)
{
static int n = -1;
static LPWSTR outs[4] = {NULL /*, NULL, etc. */};
if (++n >= (sizeof (outs) / sizeof (outs[0])))
n = 0;
/* Allocate space for the converted string, reusing any previously allocated
space, if applicable. */
if (outs[n])
outs[n] = (LPWSTR) REALLOC (outs[n], len);
else
outs[n] = (LPWSTR) MALLOC (len);
return outs[n];
}
/* Get a an ID (possibly) and a DWORD from the host gdb.
Don't bother with the id if the main loop has already
read it. */
@@ -175,7 +175,7 @@ getmemory (LPCWSTR huh, int s, gdb_wince_id what, gdb_wince_len *inlen)
*inlen = getlen (huh, s, what);
p = mempool (*inlen); /* FIXME: check for error */
p = mempool ((unsigned int) *inlen); /* FIXME: check for error */
if ((gdb_wince_len) sockread (huh, s, p, *inlen) != *inlen)
stub_error (L"error getting string from host.");
@@ -269,6 +269,49 @@ terminate_process (int s)
&res, sizeof (res));
}
static int stepped = 0;
/* Handle single step instruction. FIXME: unneded? */
static void
flag_single_step (int s)
{
stepped = 1;
skip_next_id = 0;
}
struct skipper
{
wchar_t *s;
int nskip;
} skippy[] =
{
{L"Undefined Instruction:", 1},
{L"Data Abort:", 2},
{NULL, 0}
};
static int
skip_message (DEBUG_EVENT *ev)
{
char s[80];
DWORD nread;
struct skipper *skp;
int nbytes = ev->u.DebugString.nDebugStringLength;
if (nbytes > sizeof(s))
nbytes = sizeof(s);
memset (s, 0, sizeof (s));
if (!ReadProcessMemory (curproc, ev->u.DebugString.lpDebugStringData,
s, nbytes, &nread))
return 0;
for (skp = skippy; skp->s != NULL; skp++)
if (wcsncmp ((wchar_t *) s, skp->s, wcslen (skp->s)) == 0)
return skp->nskip;
return 0;
}
/* Emulate WaitForDebugEvent. Returns the debug event on success. */
static void
wait_for_debug_event (int s)
@@ -276,10 +319,32 @@ wait_for_debug_event (int s)
DWORD ms = getdword (L"WaitForDebugEvent ms", s, GDB_WAITFORDEBUGEVENT);
gdb_wince_result res;
DEBUG_EVENT ev;
static int skip_next = 0;
res = WaitForDebugEvent (&ev, ms);
putresult (L"WaitForDebugEvent event", res, s, GDB_WAITFORDEBUGEVENT,
&ev, sizeof (ev));
for (;;)
{
res = WaitForDebugEvent (&ev, ms);
if (ev.dwDebugEventCode == OUTPUT_DEBUG_STRING_EVENT)
{
if (skip_next)
{
skip_next--;
goto ignore;
}
if (skip_next = skip_message (&ev))
goto ignore;
}
putresult (L"WaitForDebugEvent event", res, s, GDB_WAITFORDEBUGEVENT,
&ev, sizeof (ev));
break;
ignore:
ContinueDebugEvent (ev.dwProcessId, ev.dwThreadId, DBG_CONTINUE);
}
return;
}
/* Emulate GetThreadContext. Returns CONTEXT structure on success. */
@@ -291,7 +356,7 @@ get_thread_context (int s)
gdb_wince_result res;
memset (&c, 0, sizeof (c));
c.ContextFlags = getdword (L"GetThreadContext handle", s, GDB_GETTHREADCONTEXT);
c.ContextFlags = getdword (L"GetThreadContext flags", s, GDB_GETTHREADCONTEXT);
res = (gdb_wince_result) GetThreadContext (h, &c);
putresult (L"GetThreadContext data", res, s, GDB_GETTHREADCONTEXT,
@@ -319,7 +384,7 @@ read_process_memory (int s)
HANDLE h = gethandle (L"ReadProcessMemory handle", s, GDB_READPROCESSMEMORY);
LPVOID p = getpvoid (L"ReadProcessMemory base", s, GDB_READPROCESSMEMORY);
gdb_wince_len len = getlen (L"ReadProcessMemory size", s, GDB_READPROCESSMEMORY);
LPVOID buf = mempool ((gdb_wince_len) len);
LPVOID buf = mempool ((unsigned int) len);
DWORD outlen;
gdb_wince_result res;
@@ -400,12 +465,6 @@ close_handle (int s)
putresult (L"CloseHandle result", res, s, GDB_CLOSEHANDLE, &res, sizeof (res));
}
/* Handle single step instruction */
static void
single_step (int s)
{
}
/* Main loop for reading requests from gdb host on the socket. */
static void
dispatch (int s)
@@ -458,8 +517,8 @@ dispatch (int s)
terminate_process (s);
return;
case GDB_SINGLESTEP:
single_step (s);
return;
flag_single_step (s);
break;
default:
{
WCHAR buf[80];
@@ -495,8 +554,6 @@ WinMain (HINSTANCE hi, HINSTANCE hp, LPWSTR cmd, int show)
wcstombs (host, whost, 80); /* Convert from UNICODE to ascii */
}
MessageBoxW (NULL, whost, L"GDB", MB_ICONERROR);
/* Winsock initialization. */
if (WSAStartup (MAKEWORD (1, 1), &wd))
stub_error (L"Couldn't initialize WINSOCK.");