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-rw-r--r--gdb/windows-nat.c231
1 files changed, 143 insertions, 88 deletions
diff --git a/gdb/windows-nat.c b/gdb/windows-nat.c
index dcc3d33..2f7e8cc 100644
--- a/gdb/windows-nat.c
+++ b/gdb/windows-nat.c
@@ -22,7 +22,7 @@
Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
-/* by Steve Chamberlain, sac@cygnus.com */
+/* Originally by Steve Chamberlain, sac@cygnus.com */
/* We assume we're being built with and will be used for cygwin. */
@@ -86,7 +86,7 @@ static int debug_registers_used = 0;
#define CYGWIN_SIGNAL_STRING "cygwin: signal"
#define CHECK(x) check (x, __FILE__,__LINE__)
-#define DEBUG_EXEC(x) if (debug_exec) printf_unfiltered x
+#define DEBUG_EXEC(x) if (debug_exec) printf_unfiltered x
#define DEBUG_EVENTS(x) if (debug_events) printf_unfiltered x
#define DEBUG_MEM(x) if (debug_memory) printf_unfiltered x
#define DEBUG_EXCEPT(x) if (debug_exceptions) printf_unfiltered x
@@ -128,14 +128,19 @@ static DWORD main_thread_id; /* Thread ID of the main thread */
/* Counts of things. */
static int exception_count = 0;
static int event_count = 0;
+static int saw_create;
/* User options. */
static int new_console = 0;
static int new_group = 1;
-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_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 */
+static int useshell = 0; /* use shell for subprocesses */
+
+/* Path to shell */
+static char shell[MAX_PATH + 1];
/* This vector maps GDB's idea of a register's number into an address
in the win32 exception context vector.
@@ -226,7 +231,7 @@ static void
check (BOOL ok, const char *file, int line)
{
if (!ok)
- printf_filtered ("error return %s:%d was %lu\n", file, line,
+ printf_filtered ("error return %s:%d was %lu\n", file, line,
GetLastError ());
}
@@ -284,7 +289,7 @@ child_add_thread (DWORD id, HANDLE h)
th->next = thread_head.next;
thread_head.next = th;
add_thread (pid_to_ptid (id));
- /* Set the debug registers for the new thread in they are used. */
+ /* Set the debug registers for the new thread in they are used. */
if (debug_registers_used)
{
/* Only change the value of the debug registers. */
@@ -604,14 +609,58 @@ register_loaded_dll (const char *name, DWORD load_addr)
max_dll_name_len = len;
}
+char *
+get_image_name (HANDLE h, void *address, int unicode)
+{
+ static char buf[(2 * MAX_PATH) + 1];
+ DWORD size = unicode ? sizeof (WCHAR) : sizeof (char);
+ char *address_ptr;
+ int len = 0;
+ char b[2];
+ DWORD done;
+
+ /* 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 (address == NULL)
+ return NULL;
+
+ ReadProcessMemory (h, address, &address_ptr, sizeof (address_ptr), &done);
+
+ /* See if we could read the address of a string, and that the
+ address isn't null. */
+
+ if (done != sizeof (address_ptr) || !address_ptr)
+ return NULL;
+
+ /* Find the length of the string */
+ do
+ {
+ ReadProcessMemory (h, address_ptr + len * size, &b, size, &done);
+ len++;
+ }
+ while ((b[0] != 0 || b[size - 1] != 0) && done == size);
+
+ if (!unicode)
+ ReadProcessMemory (h, address_ptr, buf, len, &done);
+ else
+ {
+ WCHAR *unicode_address = (WCHAR *) alloca (len * sizeof (WCHAR));
+ ReadProcessMemory (h, address_ptr, unicode_address, len * sizeof (WCHAR),
+ &done);
+
+ WideCharToMultiByte (CP_ACP, 0, unicode_address, len, buf, len, 0, 0);
+ }
+
+ return buf;
+}
+
/* 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 (void *dummy)
{
LOAD_DLL_DEBUG_INFO *event = &current_event.u.LoadDll;
- DWORD dll_name_ptr;
- DWORD done;
char dll_buf[MAX_PATH + 1];
char *dll_name = NULL;
char *p;
@@ -623,62 +672,8 @@ handle_load_dll (void *dummy)
dll_name = dll_buf;
- /* 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')
- {
- DWORD 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 == '\0')
+ dll_name = get_image_name (current_process_handle, event->lpImageName, event->fUnicode);
if (!dll_name)
return 1;
@@ -785,7 +780,7 @@ info_dll_command (char *ignore, int from_tty)
if (!so->next)
return;
- printf_filtered ("%*s Load Address\n", -max_dll_name_len, "DLL Name");
+ printf_filtered ("%*s Load Address\n", -max_dll_name_len, "DLL Name");
while ((so = so->next) != NULL)
printf_filtered ("%*s %08lx\n", -max_dll_name_len, so->name, so->load_addr);
@@ -943,7 +938,7 @@ child_continue (DWORD continue_status, int id)
DEBUG_EVENTS (("ContinueDebugEvent (cpid=%ld, ctid=%ld, %s);\n",
current_event.dwProcessId, current_event.dwThreadId,
- continue_status == DBG_CONTINUE ?
+ continue_status == DBG_CONTINUE ?
"DBG_CONTINUE" : "DBG_EXCEPTION_NOT_HANDLED"));
res = ContinueDebugEvent (current_event.dwProcessId,
current_event.dwThreadId,
@@ -966,7 +961,7 @@ child_continue (DWORD continue_status, int id)
th->context.Dr2 = dr[2];
th->context.Dr3 = dr[3];
/* th->context.Dr6 = dr[6];
- FIXME: should we set dr6 also ?? */
+ FIXME: should we set dr6 also ?? */
th->context.Dr7 = dr[7];
CHECK (SetThreadContext (th->h, &th->context));
th->context.ContextFlags = 0;
@@ -1007,6 +1002,8 @@ get_child_debug_event (int pid, struct target_waitstatus *ourstatus)
(unsigned) current_event.dwProcessId,
(unsigned) current_event.dwThreadId,
"CREATE_THREAD_DEBUG_EVENT"));
+ if (saw_create != 1)
+ break;
/* Record the existence of this thread */
th = child_add_thread (current_event.dwThreadId,
current_event.u.CreateThread.hThread);
@@ -1022,6 +1019,8 @@ get_child_debug_event (int pid, struct target_waitstatus *ourstatus)
(unsigned) current_event.dwProcessId,
(unsigned) current_event.dwThreadId,
"EXIT_THREAD_DEBUG_EVENT"));
+ if (saw_create != 1)
+ break;
child_delete_thread (current_event.dwThreadId);
th = &dummy_thread_info;
break;
@@ -1032,8 +1031,13 @@ get_child_debug_event (int pid, struct target_waitstatus *ourstatus)
(unsigned) current_event.dwThreadId,
"CREATE_PROCESS_DEBUG_EVENT"));
CloseHandle (current_event.u.CreateProcessInfo.hFile);
- current_process_handle = current_event.u.CreateProcessInfo.hProcess;
+ if (++saw_create != 1)
+ {
+ CloseHandle (current_event.u.CreateProcessInfo.hProcess);
+ break;
+ }
+ current_process_handle = current_event.u.CreateProcessInfo.hProcess;
main_thread_id = current_event.dwThreadId;
/* Add the main thread */
#if 0
@@ -1050,6 +1054,8 @@ get_child_debug_event (int pid, struct target_waitstatus *ourstatus)
(unsigned) current_event.dwProcessId,
(unsigned) current_event.dwThreadId,
"EXIT_PROCESS_DEBUG_EVENT"));
+ if (saw_create != 1)
+ break;
ourstatus->kind = TARGET_WAITKIND_EXITED;
ourstatus->value.integer = current_event.u.ExitProcess.dwExitCode;
CloseHandle (current_process_handle);
@@ -1062,6 +1068,8 @@ get_child_debug_event (int pid, struct target_waitstatus *ourstatus)
(unsigned) current_event.dwThreadId,
"LOAD_DLL_DEBUG_EVENT"));
CloseHandle (current_event.u.LoadDll.hFile);
+ if (saw_create != 1)
+ break;
catch_errors (handle_load_dll, NULL, (char *) "", RETURN_MASK_ALL);
registers_changed (); /* mark all regs invalid */
ourstatus->kind = TARGET_WAITKIND_LOADED;
@@ -1074,6 +1082,8 @@ get_child_debug_event (int pid, struct target_waitstatus *ourstatus)
(unsigned) current_event.dwProcessId,
(unsigned) current_event.dwThreadId,
"UNLOAD_DLL_DEBUG_EVENT"));
+ if (saw_create != 1)
+ break;
catch_errors (handle_unload_dll, NULL, (char *) "", RETURN_MASK_ALL);
registers_changed (); /* mark all regs invalid */
/* ourstatus->kind = TARGET_WAITKIND_UNLOADED;
@@ -1085,6 +1095,8 @@ get_child_debug_event (int pid, struct target_waitstatus *ourstatus)
(unsigned) current_event.dwProcessId,
(unsigned) current_event.dwThreadId,
"EXCEPTION_DEBUG_EVENT"));
+ if (saw_create != 1)
+ break;
if (handle_exception (ourstatus))
retval = current_event.dwThreadId;
break;
@@ -1094,11 +1106,15 @@ get_child_debug_event (int pid, struct target_waitstatus *ourstatus)
(unsigned) current_event.dwProcessId,
(unsigned) current_event.dwThreadId,
"OUTPUT_DEBUG_STRING_EVENT"));
+ if (saw_create != 1)
+ break;
if (handle_output_debug_string (ourstatus))
retval = main_thread_id;
break;
default:
+ if (saw_create != 1)
+ break;
printf_unfiltered ("gdb: kernel event for pid=%ld tid=%ld\n",
(DWORD) current_event.dwProcessId,
(DWORD) current_event.dwThreadId);
@@ -1107,7 +1123,7 @@ get_child_debug_event (int pid, struct target_waitstatus *ourstatus)
break;
}
- if (!retval)
+ if (!retval || saw_create != 1)
CHECK (child_continue (continue_status, -1));
else
{
@@ -1159,7 +1175,7 @@ do_initial_child_stuff (DWORD pid)
event_count = 0;
exception_count = 0;
debug_registers_changed = 0;
- debug_registers_used = 0;
+ debug_registers_used = 0;
for (i = 0; i < sizeof (dr) / sizeof (dr[0]); i++)
dr[i] = 0;
current_event.dwProcessId = pid;
@@ -1309,7 +1325,6 @@ child_open (char *arg, int from_tty)
static void
child_create_inferior (char *exec_file, char *allargs, char **env)
{
- char real_path[MAXPATHLEN];
char *winenv;
char *temp;
int envlen;
@@ -1319,6 +1334,8 @@ child_create_inferior (char *exec_file, char *allargs, char **env)
BOOL ret;
DWORD flags;
char *args;
+ char real_path[MAXPATHLEN];
+ char *toexec;
if (!exec_file)
error ("No executable specified, use `target exec'.\n");
@@ -1326,9 +1343,7 @@ child_create_inferior (char *exec_file, char *allargs, char **env)
memset (&si, 0, sizeof (si));
si.cb = sizeof (si);
- cygwin_conv_to_win32_path (exec_file, real_path);
-
- flags = DEBUG_ONLY_THIS_PROCESS;
+ flags = 0;
if (new_group)
flags |= CREATE_NEW_PROCESS_GROUP;
@@ -1336,10 +1351,23 @@ child_create_inferior (char *exec_file, char *allargs, char **env)
if (new_console)
flags |= CREATE_NEW_CONSOLE;
- args = alloca (strlen (real_path) + strlen (allargs) + 2);
-
- strcpy (args, real_path);
+ if (!useshell || !shell[0])
+ {
+ flags = DEBUG_ONLY_THIS_PROCESS;
+ cygwin_conv_to_win32_path (exec_file, real_path);
+ toexec = real_path;
+ }
+ else
+ {
+ char *newallargs = alloca (sizeof (" -c 'exec '") + strlen (exec_file) + strlen (allargs) + 2);
+ sprintf (newallargs, " -c 'exec %s %s'", exec_file, allargs);
+ allargs = newallargs;
+ toexec = shell;
+ flags = DEBUG_PROCESS;
+ }
+ args = alloca (strlen (toexec) + strlen (allargs) + 2);
+ strcpy (args, toexec);
strcat (args, " ");
strcat (args, allargs);
@@ -1431,6 +1459,12 @@ child_create_inferior (char *exec_file, char *allargs, char **env)
CloseHandle (pi.hThread);
CloseHandle (pi.hProcess);
+
+ if (useshell && shell[0] != '\0')
+ saw_create = -1;
+ else
+ saw_create = 0;
+
do_initial_child_stuff (pi.dwProcessId);
/* child_continue (DBG_CONTINUE, -1); */
@@ -1523,7 +1557,7 @@ child_resume (ptid_t ptid, int step, enum target_signal sig)
#if 0
/* This code does not seem to work, because
the kernel does probably not consider changes in the ExceptionRecord
- structure when passing the exception to the inferior.
+ structure when passing the exception to the inferior.
Note that this seems possible in the exception handler itself. */
{
int i;
@@ -1541,7 +1575,7 @@ child_resume (ptid_t ptid, int step, enum target_signal sig)
}
}
#endif
- DEBUG_EXCEPT(("Can only continue with recieved signal %d.\n",
+ DEBUG_EXCEPT(("Can only continue with recieved signal %d.\n",
last_sig));
}
@@ -1565,13 +1599,13 @@ child_resume (ptid_t ptid, int step, enum target_signal sig)
{
if (debug_registers_changed)
{
- th->context.Dr0 = dr[0];
- th->context.Dr1 = dr[1];
- th->context.Dr2 = dr[2];
- th->context.Dr3 = dr[3];
- /* th->context.Dr6 = dr[6];
- FIXME: should we set dr6 also ?? */
- th->context.Dr7 = dr[7];
+ th->context.Dr0 = dr[0];
+ th->context.Dr1 = dr[1];
+ th->context.Dr2 = dr[2];
+ th->context.Dr3 = dr[3];
+ /* th->context.Dr6 = dr[6];
+ FIXME: should we set dr6 also ?? */
+ th->context.Dr7 = dr[7];
}
CHECK (SetThreadContext (th->h, &th->context));
th->context.ContextFlags = 0;
@@ -1655,6 +1689,7 @@ void
_initialize_inftarg (void)
{
struct cmd_list_element *c;
+ const char *sh;
init_child_ops ();
@@ -1662,8 +1697,28 @@ _initialize_inftarg (void)
"Load dll library symbols from FILE.");
c->completer = filename_completer;
+ sh = getenv ("SHELL");
+ if (!sh)
+ sh = "/bin/sh";
+ if (access (sh, X_OK) != 0)
+ {
+ shell[0] = '\0';
+ useshell = 0;
+ }
+ else
+ {
+ cygwin_conv_to_win32_path (sh, shell);
+ useshell = 1;
+ }
+
add_com_alias ("sharedlibrary", "dll-symbols", class_alias, 1);
+ add_show_from_set (add_set_cmd ("shell", class_support, var_boolean,
+ (char *) &useshell,
+ "Set use of shell to start subprocess.",
+ &setlist),
+ &showlist);
+
add_show_from_set (add_set_cmd ("new-console", class_support, var_boolean,
(char *) &new_console,
"Set creation of new console when creating child process.",
@@ -2009,7 +2064,7 @@ _initialize_check_for_gdb_ini (void)
{
int len = strlen (oldini);
char *newini = alloca (len + 1);
- sprintf (newini, "%.*s.gdbinit",
+ sprintf (newini, "%.*s.gdbinit",
(int) (len - (sizeof ("gdb.ini") - 1)), oldini);
warning ("obsolete '%s' found. Rename to '%s'.", oldini, newini);
}
generated by cgit v1.1 at 2024-12-14 00:02:00 +0000