/* Target-vector operations for controlling win32 child processes, for GDB.
- Copyright 1995, 1996 Free Software Foundation, Inc.
+ Copyright 1995, 1996, 1997, 1998 Free Software Foundation, Inc.
Contributed by Cygnus Support.
This file is part of GDB.
/* by Steve Chamberlain, sac@cygnus.com */
-/* We assume we're being built with and will be used for cygwin32. */
+/* We assume we're being built with and will be used for cygwin. */
#include "defs.h"
#include "frame.h" /* required by inferior.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
extern struct target_ops child_ops;
static void child_stop PARAMS ((void));
+static int child_thread_alive PARAMS ((int));
+
+static int last_sig = 0; /* Set if a signal was received from the
+ debugged process */
-/* The most recently read context. Inspect ContextFlags to see what
- bits are valid. */
+/* 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 CONTEXT context;
+static thread_info thread_head = {NULL};
/* The process and thread handles for the above context. */
-static HANDLE current_process;
-static HANDLE current_thread;
-static int current_process_id;
-static int current_thread_id;
+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 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.
+ in the win32 exception context vector.
- It also contains the bit mask needed to load the register in question.
+ 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,
the other regs of the group, and then we copy the info in and set
out bit. */
-struct regmappings
- {
- char *incontext;
- int mask;
- };
-
-static const struct regmappings mappings[] =
-{
-#ifdef __PPC__
- {(char *) &context.Gpr0, CONTEXT_INTEGER},
- {(char *) &context.Gpr1, CONTEXT_INTEGER},
- {(char *) &context.Gpr2, CONTEXT_INTEGER},
- {(char *) &context.Gpr3, CONTEXT_INTEGER},
- {(char *) &context.Gpr4, CONTEXT_INTEGER},
- {(char *) &context.Gpr5, CONTEXT_INTEGER},
- {(char *) &context.Gpr6, CONTEXT_INTEGER},
- {(char *) &context.Gpr7, CONTEXT_INTEGER},
-
- {(char *) &context.Gpr8, CONTEXT_INTEGER},
- {(char *) &context.Gpr9, CONTEXT_INTEGER},
- {(char *) &context.Gpr10, CONTEXT_INTEGER},
- {(char *) &context.Gpr11, CONTEXT_INTEGER},
- {(char *) &context.Gpr12, CONTEXT_INTEGER},
- {(char *) &context.Gpr13, CONTEXT_INTEGER},
- {(char *) &context.Gpr14, CONTEXT_INTEGER},
- {(char *) &context.Gpr15, CONTEXT_INTEGER},
-
- {(char *) &context.Gpr16, CONTEXT_INTEGER},
- {(char *) &context.Gpr17, CONTEXT_INTEGER},
- {(char *) &context.Gpr18, CONTEXT_INTEGER},
- {(char *) &context.Gpr19, CONTEXT_INTEGER},
- {(char *) &context.Gpr20, CONTEXT_INTEGER},
- {(char *) &context.Gpr21, CONTEXT_INTEGER},
- {(char *) &context.Gpr22, CONTEXT_INTEGER},
- {(char *) &context.Gpr23, CONTEXT_INTEGER},
-
- {(char *) &context.Gpr24, CONTEXT_INTEGER},
- {(char *) &context.Gpr25, CONTEXT_INTEGER},
- {(char *) &context.Gpr26, CONTEXT_INTEGER},
- {(char *) &context.Gpr27, CONTEXT_INTEGER},
- {(char *) &context.Gpr28, CONTEXT_INTEGER},
- {(char *) &context.Gpr29, CONTEXT_INTEGER},
- {(char *) &context.Gpr30, CONTEXT_INTEGER},
- {(char *) &context.Gpr31, CONTEXT_INTEGER},
-
- {(char *) &context.Fpr0, CONTEXT_FLOATING_POINT},
- {(char *) &context.Fpr1, CONTEXT_FLOATING_POINT},
- {(char *) &context.Fpr2, CONTEXT_FLOATING_POINT},
- {(char *) &context.Fpr3, CONTEXT_FLOATING_POINT},
- {(char *) &context.Fpr4, CONTEXT_FLOATING_POINT},
- {(char *) &context.Fpr5, CONTEXT_FLOATING_POINT},
- {(char *) &context.Fpr6, CONTEXT_FLOATING_POINT},
- {(char *) &context.Fpr7, CONTEXT_FLOATING_POINT},
-
- {(char *) &context.Fpr8, CONTEXT_FLOATING_POINT},
- {(char *) &context.Fpr9, CONTEXT_FLOATING_POINT},
- {(char *) &context.Fpr10, CONTEXT_FLOATING_POINT},
- {(char *) &context.Fpr11, CONTEXT_FLOATING_POINT},
- {(char *) &context.Fpr12, CONTEXT_FLOATING_POINT},
- {(char *) &context.Fpr13, CONTEXT_FLOATING_POINT},
- {(char *) &context.Fpr14, CONTEXT_FLOATING_POINT},
- {(char *) &context.Fpr15, CONTEXT_FLOATING_POINT},
-
- {(char *) &context.Fpr16, CONTEXT_FLOATING_POINT},
- {(char *) &context.Fpr17, CONTEXT_FLOATING_POINT},
- {(char *) &context.Fpr18, CONTEXT_FLOATING_POINT},
- {(char *) &context.Fpr19, CONTEXT_FLOATING_POINT},
- {(char *) &context.Fpr20, CONTEXT_FLOATING_POINT},
- {(char *) &context.Fpr21, CONTEXT_FLOATING_POINT},
- {(char *) &context.Fpr22, CONTEXT_FLOATING_POINT},
- {(char *) &context.Fpr23, CONTEXT_FLOATING_POINT},
-
- {(char *) &context.Fpr24, CONTEXT_FLOATING_POINT},
- {(char *) &context.Fpr25, CONTEXT_FLOATING_POINT},
- {(char *) &context.Fpr26, CONTEXT_FLOATING_POINT},
- {(char *) &context.Fpr27, CONTEXT_FLOATING_POINT},
- {(char *) &context.Fpr28, CONTEXT_FLOATING_POINT},
- {(char *) &context.Fpr29, CONTEXT_FLOATING_POINT},
- {(char *) &context.Fpr30, CONTEXT_FLOATING_POINT},
- {(char *) &context.Fpr31, CONTEXT_FLOATING_POINT},
-
- {(char *) &context.Iar, CONTEXT_CONTROL},
- {(char *) &context.Msr, CONTEXT_CONTROL},
- {(char *) &context.Cr, CONTEXT_INTEGER},
- {(char *) &context.Lr, CONTEXT_CONTROL},
- {(char *) &context.Ctr, CONTEXT_CONTROL},
-
- {(char *) &context.Xer, CONTEXT_INTEGER},
- {0,0}, /* MQ, but there isn't one */
-#else
- {(char *) &context.Eax, CONTEXT_INTEGER},
- {(char *) &context.Ecx, CONTEXT_INTEGER},
- {(char *) &context.Edx, CONTEXT_INTEGER},
- {(char *) &context.Ebx, CONTEXT_INTEGER},
- {(char *) &context.Esp, CONTEXT_CONTROL},
- {(char *) &context.Ebp, CONTEXT_CONTROL},
- {(char *) &context.Esi, CONTEXT_INTEGER},
- {(char *) &context.Edi, CONTEXT_INTEGER},
- {(char *) &context.Eip, CONTEXT_CONTROL},
- {(char *) &context.EFlags, CONTEXT_CONTROL},
- {(char *) &context.SegCs, CONTEXT_SEGMENTS},
- {(char *) &context.SegSs, CONTEXT_SEGMENTS},
- {(char *) &context.SegDs, CONTEXT_SEGMENTS},
- {(char *) &context.SegEs, CONTEXT_SEGMENTS},
- {(char *) &context.SegFs, CONTEXT_SEGMENTS},
- {(char *) &context.SegGs, CONTEXT_SEGMENTS},
- {&context.FloatSave.RegisterArea[0 * 10], CONTEXT_FLOATING_POINT},
- {&context.FloatSave.RegisterArea[1 * 10], CONTEXT_FLOATING_POINT},
- {&context.FloatSave.RegisterArea[2 * 10], CONTEXT_FLOATING_POINT},
- {&context.FloatSave.RegisterArea[3 * 10], CONTEXT_FLOATING_POINT},
- {&context.FloatSave.RegisterArea[4 * 10], CONTEXT_FLOATING_POINT},
- {&context.FloatSave.RegisterArea[5 * 10], CONTEXT_FLOATING_POINT},
- {&context.FloatSave.RegisterArea[6 * 10], CONTEXT_FLOATING_POINT},
- {&context.FloatSave.RegisterArea[7 * 10], CONTEXT_FLOATING_POINT},
-#endif
+#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
{EXCEPTION_SINGLE_STEP, TARGET_SIGNAL_TRAP},
{-1, -1}};
-static void
-check (BOOL ok, const char *file, int line)
+/* 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)
{
- if (!ok)
- printf_filtered ("error return %s:%d was %d\n", file, line, GetLastError ());
+ 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_fetch_inferior_registers (int r)
+child_init_thread_list ()
{
- if (r < 0)
+ thread_info *th = &thread_head;
+
+ DEBUG_EVENTS (("gdb: child_init_thread_list\n"));
+ init_thread_list ();
+ while (th->next != NULL)
{
- for (r = 0; r < NUM_REGS; r++)
- child_fetch_inferior_registers (r);
+ thread_info *here = th->next;
+ th->next = here->next;
+ (void) CloseHandle (here->h);
+ free (here);
}
- else
+}
+
+/* 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)
{
- supply_register (r, mappings[r].incontext);
+ thread_info *here = th->next;
+ th->next = here->next;
+ CloseHandle (here->h);
+ free (here);
}
}
static void
-child_store_inferior_registers (int r)
+check (BOOL ok, const char *file, int line)
{
- if (r < 0)
+ 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 *) ¤t_thread->context) + mappings[r]);
+ else
{
for (r = 0; r < NUM_REGS; r++)
- child_store_inferior_registers (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 *) ¤t_thread->context) + mappings[r]);
else
{
- read_register_gen (r, mappings[r].incontext);
+ 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 (char *eventp)
+handle_load_dll (char *dummy)
{
- DEBUG_EVENT * event = (DEBUG_EVENT *)eventp;
+ LOAD_DLL_DEBUG_INFO * event = ¤t_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
- ReadProcessMemory (current_process,
- (DWORD) event->u.LoadDll.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)
+ /* 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')
{
- char *dll_name, *dll_basename;
- struct objfile *objfile;
- char unix_dll_name[MAX_PATH];
- int size = event->u.LoadDll.fUnicode ? sizeof (WCHAR) : sizeof (char);
+ 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,
- dll_name_ptr + len * size,
+ ReadProcessMemory (current_process_handle,
+ (LPCVOID) (dll_name_ptr + len * size),
&b,
size,
&done);
dll_name = alloca (len);
- if (event->u.LoadDll.fUnicode)
+ if (event->fUnicode)
{
WCHAR *unicode_dll_name = (WCHAR *) alloca (len * sizeof (WCHAR));
- ReadProcessMemory (current_process,
- dll_name_ptr,
+ ReadProcessMemory (current_process_handle,
+ (LPCVOID) dll_name_ptr,
unicode_dll_name,
len * sizeof (WCHAR),
&done);
}
else
{
- ReadProcessMemory (current_process,
- dll_name_ptr,
+ ReadProcessMemory (current_process_handle,
+ (LPCVOID) dll_name_ptr,
dll_name,
len,
&done);
}
-
- /* FIXME: Can we delete this call? */
- cygwin32_conv_to_posix_path (dll_name, unix_dll_name);
-
- /* 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 = strrchr(dll_name, '/');
-
- ALL_OBJFILES(objfile)
- {
- char *objfile_basename;
- if (!(objfile_basename = strrchr(objfile->name, '\\')))
- objfile_basename = strrchr(objfile->name, '/');
-
- if (dll_basename && objfile_basename &&
- strcmp(dll_basename+1, objfile_basename+1) == 0)
- {
- printf_unfiltered ("%s (symbols previously loaded)\n",
- dll_basename + 1);
- return 1;
- }
- }
-
- context.ContextFlags = CONTEXT_FULL | CONTEXT_FLOATING_POINT;
- GetThreadContext (current_thread, &context);
-
- /* 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 ? */
-
-
- symbol_file_add (unix_dll_name, 0,
- (int) event->u.LoadDll.lpBaseOfDll + 0x1000, 0, 0, 0);
-
- printf_unfiltered ("%x:%s\n", event->u.LoadDll.lpBaseOfDll,
- unix_dll_name);
}
+
+ 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;
-static void
-handle_exception (DEBUG_EVENT * event, struct target_waitstatus *ourstatus)
+ 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 (event->u.Exception.ExceptionRecord.ExceptionCode)
+ switch (current_event.u.Exception.ExceptionRecord.ExceptionCode)
{
case EXCEPTION_ACCESS_VIOLATION:
DEBUG_EXCEPT (("gdb: Target exception ACCESS_VIOLATION at 0x%08x\n",
- event->u.Exception.ExceptionRecord.ExceptionAddress));
+ 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",
- event->u.Exception.ExceptionRecord.ExceptionAddress));
+ 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",
- event->u.Exception.ExceptionRecord.ExceptionAddress));
+ 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",
- event->u.Exception.ExceptionRecord.ExceptionAddress));
+ 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",
- event->u.Exception.ExceptionRecord.ExceptionAddress));
+ 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",
- event->u.Exception.ExceptionRecord.ExceptionCode,
- event->u.Exception.ExceptionRecord.ExceptionAddress);
+ current_event.u.Exception.ExceptionRecord.ExceptionCode,
+ current_event.u.Exception.ExceptionRecord.ExceptionAddress);
ourstatus->value.sig = TARGET_SIGNAL_UNKNOWN;
break;
}
- context.ContextFlags = CONTEXT_FULL | CONTEXT_FLOATING_POINT;
- GetThreadContext (current_thread, &context);
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
{
/* 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. But some of these exceptions mark
+ 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)
{
- DEBUG_EVENT event;
- BOOL t = WaitForDebugEvent (&event, INFINITE);
+ DWORD continue_status;
+ BOOL t = WaitForDebugEvent (¤t_event, INFINITE);
char *p;
+ thread_info *th;
+ int sig;
event_count++;
- current_thread_id = event.dwThreadId;
- current_process_id = event.dwProcessId;
+ continue_status = DBG_CONTINUE;
- switch (event.dwDebugEventCode)
+ switch (current_event.dwDebugEventCode)
{
case CREATE_THREAD_DEBUG_EVENT:
- DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n",
- event.dwProcessId, event.dwThreadId,
+ 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",
- event.dwProcessId, event.dwThreadId,
+ 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",
- event.dwProcessId, event.dwThreadId,
+ 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",
- event.dwProcessId, event.dwThreadId,
+ current_event.dwProcessId, current_event.dwThreadId,
"EXIT_PROCESS_DEBUG_EVENT"));
ourstatus->kind = TARGET_WAITKIND_EXITED;
- ourstatus->value.integer = event.u.ExitProcess.dwExitCode;
- CloseHandle (current_process);
- CloseHandle (current_thread);
- return current_process_id;
+ 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",
- event.dwProcessId, event.dwThreadId,
+ current_event.dwProcessId, current_event.dwThreadId,
"LOAD_DLL_DEBUG_EVENT"));
- catch_errors (handle_load_dll,
- (char*) &event,
- "\n[failed reading symbols from DLL]\n",
- RETURN_MASK_ALL);
+ 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",
- event.dwProcessId, event.dwThreadId,
+ current_event.dwProcessId, current_event.dwThreadId,
"UNLOAD_DLL_DEBUG_EVENT"));
break; /* FIXME: don't know what to do here */
- case EXCEPTION_DEBUG_EVENT:
+
+ case EXCEPTION_DEBUG_EVENT:
DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n",
- event.dwProcessId, event.dwThreadId,
+ current_event.dwProcessId, current_event.dwThreadId,
"EXCEPTION_DEBUG_EVENT"));
- handle_exception (&event, ourstatus);
- return current_process_id;
+ if (handle_exception (ourstatus))
+ return current_event.dwThreadId;
+ continue_status = DBG_EXCEPTION_NOT_HANDLED;
+ break;
case OUTPUT_DEBUG_STRING_EVENT: /* message from the kernel */
DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n",
- event.dwProcessId, event.dwThreadId,
+ current_event.dwProcessId, current_event.dwThreadId,
"OUTPUT_DEBUG_STRING_EVENT"));
- if (target_read_string
- ((CORE_ADDR) event.u.DebugString.lpDebugStringData,
- &p, 1024, 0) && p && *p)
- {
- warning(p);
- free(p);
- }
+ if (handle_output_debug_string (ourstatus))
+ return main_thread_id;
break;
default:
printf_unfiltered ("gdb: kernel event for pid=%d tid=%d\n",
- event.dwProcessId, event.dwThreadId);
+ current_event.dwProcessId,
+ current_event.dwThreadId);
printf_unfiltered (" unknown event code %d\n",
- event.dwDebugEventCode);
+ current_event.dwDebugEventCode);
break;
}
- DEBUG_EVENTS (("ContinueDebugEvent (cpid=%d, ctid=%d, DBG_CONTINUE);\n",
- current_process_id, current_thread_id));
- CHECK (ContinueDebugEvent (current_process_id,
- current_thread_id,
- DBG_CONTINUE));
+
+ CHECK (child_continue (continue_status, -1));
}
}
if (!args)
error_no_arg ("process-id to attach");
- current_process_id = strtoul (args, 0, 0);
+ current_event.dwProcessId = strtoul (args, 0, 0);
- ok = DebugActiveProcess (current_process_id);
+ ok = DebugActiveProcess (current_event.dwProcessId);
if (!ok)
error ("Can't attach to process.");
if (exec_file)
printf_unfiltered ("Attaching to program `%s', %s\n", exec_file,
- target_pid_to_str (current_process_id));
+ target_pid_to_str (current_event.dwProcessId));
else
printf_unfiltered ("Attaching to %s\n",
- target_pid_to_str (current_process_id));
+ target_pid_to_str (current_event.dwProcessId));
gdb_flush (gdb_stdout);
}
- inferior_pid = current_process_id;
push_target (&child_ops);
}
cygwin32_conv_to_win32_path (exec_file, real_path);
- flags = DEBUG_ONLY_THIS_PROCESS;
+ flags = DEBUG_ONLY_THIS_PROCESS;
if (new_group)
flags |= CREATE_NEW_PROCESS_GROUP;
winenv = alloca (envlen + 1);
/* Copy env strings into new buffer. */
- for (temp = winenv, i = 0; env[i] && *env[i]; i++)
+ for (temp = winenv, i = 0; env[i] && *env[i]; i++)
{
int j, len;
exception_count = 0;
event_count = 0;
- inferior_pid = pi.dwProcessId;
- current_process = pi.hProcess;
- current_thread = pi.hThread;
- current_process_id = pi.dwProcessId;
- current_thread_id = pi.dwThreadId;
+ current_process_handle = pi.hProcess;
+ current_event.dwProcessId = pi.dwProcessId;
+ memset (¤t_event, 0, sizeof (current_event));
+ inferior_pid = current_event.dwThreadId = pi.dwThreadId;
push_target (&child_ops);
- init_thread_list ();
+ child_init_thread_list ();
init_wait_for_inferior ();
clear_proceed_status ();
target_terminal_init ();
static void
child_mourn_inferior ()
{
+ (void) child_continue (DBG_CONTINUE, -1);
unpush_target (&child_ops);
generic_mourn_inferior ();
}
{
DEBUG_MEM (("gdb: write target memory, %d bytes at 0x%08x\n",
len, memaddr));
- WriteProcessMemory (current_process, memaddr, our, len, &done);
- FlushInstructionCache (current_process, memaddr, len);
+ WriteProcessMemory (current_process_handle, (LPVOID) memaddr, our,
+ len, &done);
+ FlushInstructionCache (current_process_handle, (LPCVOID) memaddr, len);
}
else
{
DEBUG_MEM (("gdb: read target memory, %d bytes at 0x%08x\n",
len, memaddr));
- ReadProcessMemory (current_process, memaddr, our, len, &done);
+ ReadProcessMemory (current_process_handle, (LPCVOID) memaddr, our, len,
+ &done);
}
return done;
}
void
child_kill_inferior (void)
{
- CHECK (TerminateProcess (current_process, 0));
- CHECK (CloseHandle (current_process));
- CHECK (CloseHandle (current_thread));
+ CHECK (TerminateProcess (current_process_handle, 0));
+
+ for (;;)
+ {
+ if (!child_continue (DBG_CONTINUE, -1))
+ break;
+ if (!WaitForDebugEvent (¤t_event, INFINITE))
+ break;
+ if (current_event.dwDebugEventCode == EXIT_PROCESS_DEBUG_EVENT)
+ break;
+ }
+
+ CHECK (CloseHandle (current_process_handle));
+
+ /* this may fail in an attached process so don't check. */
+ (void) CloseHandle (current_thread->h);
target_mourn_inferior(); /* or just child_mourn_inferior? */
}
void
-child_resume (int pid, int step, enum target_signal signal)
+child_resume (int pid, int step, enum target_signal sig)
{
- DEBUG_EXEC (("gdb: child_resume (pid=%d, step=%d, signal=%d);\n",
- pid, step, signal));
+ int i;
+ thread_info *th;
+ DWORD continue_status = last_sig > 0 && last_sig < NSIG ?
+ DBG_EXCEPTION_NOT_HANDLED : DBG_CONTINUE;
+
+ DEBUG_EXEC (("gdb: child_resume (pid=%d, step=%d, sig=%d);\n",
+ pid, step, sig));
+ /* Get context for currently selected thread */
+ th = thread_rec (current_event.dwThreadId, FALSE);
if (step)
{
-#ifdef __PPC__
- warning ("Single stepping not done.\n");
-#endif
#ifdef i386
/* Single step by setting t bit */
child_fetch_inferior_registers (PS_REGNUM);
- context.EFlags |= FLAG_TRACE_BIT;
+ th->context.EFlags |= FLAG_TRACE_BIT;
#endif
}
- if (context.ContextFlags)
+ if (th->context.ContextFlags)
{
- CHECK (SetThreadContext (current_thread, &context));
- context.ContextFlags = 0;
+ CHECK (SetThreadContext (th->h, &th->context));
+ th->context.ContextFlags = 0;
}
- if (signal)
- {
- fprintf_unfiltered (gdb_stderr, "Can't send signals to the child.\n");
- }
+ /* Allow continuing with the same signal that interrupted us.
+ Otherwise complain. */
+ if (sig && sig != last_sig)
+ fprintf_unfiltered (gdb_stderr, "Can't send signals to the child. signal %d\n", sig);
- DEBUG_EVENTS (("gdb: ContinueDebugEvent (cpid=%d, ctid=%d, DBG_CONTINUE);\n",
- current_process_id, current_thread_id));
- CHECK (ContinueDebugEvent (current_process_id,
- current_thread_id,
- DBG_CONTINUE));
+ last_sig = 0;
+ child_continue (continue_status, pid);
}
static void
DEBUG_EVENTS (("gdb: child_close, inferior_pid=%d\n", inferior_pid));
}
-struct target_ops child_ops =
-{
- "child", /* to_shortname */
- "Win32 child process", /* to_longname */
- "Win32 child process (started by the \"run\" command).", /* to_doc */
- child_open, /* to_open */
- child_close, /* to_close */
- child_attach, /* to_attach */
- child_detach, /* to_detach */
- child_resume, /* to_resume */
- child_wait, /* to_wait */
- child_fetch_inferior_registers,/* to_fetch_registers */
- child_store_inferior_registers,/* to_store_registers */
- child_prepare_to_store, /* to_child_prepare_to_store */
- child_xfer_memory, /* to_xfer_memory */
- child_files_info, /* to_files_info */
- memory_insert_breakpoint, /* to_insert_breakpoint */
- memory_remove_breakpoint, /* to_remove_breakpoint */
- terminal_init_inferior, /* to_terminal_init */
- terminal_inferior, /* to_terminal_inferior */
- terminal_ours_for_output, /* to_terminal_ours_for_output */
- terminal_ours, /* to_terminal_ours */
- child_terminal_info, /* to_terminal_info */
- child_kill_inferior, /* to_kill */
- 0, /* to_load */
- 0, /* to_lookup_symbol */
- child_create_inferior, /* to_create_inferior */
- child_mourn_inferior, /* to_mourn_inferior */
- child_can_run, /* to_can_run */
- 0, /* to_notice_signals */
- 0, /* to_thread_alive */
- child_stop, /* to_stop */
- process_stratum, /* to_stratum */
- 0, /* to_next */
- 1, /* to_has_all_memory */
- 1, /* to_has_memory */
- 1, /* to_has_stack */
- 1, /* to_has_registers */
- 1, /* to_has_execution */
- 0, /* to_sections */
- 0, /* to_sections_end */
- OPS_MAGIC /* to_magic */
-};
+struct target_ops child_ops ;
+
+static void init_child_ops(void)
+{
+ child_ops.to_shortname = "child";
+ child_ops.to_longname = "Win32 child process";
+ child_ops.to_doc = "Win32 child process (started by the \"run\" command).";
+ child_ops.to_open = child_open;
+ child_ops.to_close = child_close;
+ child_ops.to_attach = child_attach;
+ child_ops.to_detach = child_detach;
+ child_ops.to_resume = child_resume;
+ child_ops.to_wait = child_wait;
+ child_ops.to_fetch_registers = child_fetch_inferior_registers;
+ child_ops.to_store_registers = child_store_inferior_registers;
+ child_ops.to_prepare_to_store = child_prepare_to_store;
+ child_ops.to_xfer_memory = child_xfer_memory;
+ child_ops.to_files_info = child_files_info;
+ child_ops.to_insert_breakpoint = memory_insert_breakpoint;
+ child_ops.to_remove_breakpoint = memory_remove_breakpoint;
+ child_ops.to_terminal_init = terminal_init_inferior;
+ child_ops.to_terminal_inferior = terminal_inferior;
+ child_ops.to_terminal_ours_for_output = terminal_ours_for_output;
+ child_ops.to_terminal_ours = terminal_ours;
+ child_ops.to_terminal_info = child_terminal_info;
+ child_ops.to_kill = child_kill_inferior;
+ child_ops.to_load = 0;
+ child_ops.to_lookup_symbol = 0;
+ child_ops.to_create_inferior = child_create_inferior;
+ child_ops.to_mourn_inferior = child_mourn_inferior;
+ child_ops.to_can_run = child_can_run;
+ child_ops.to_notice_signals = 0;
+ child_ops.to_thread_alive = child_thread_alive;
+ child_ops.to_stop = child_stop;
+ child_ops.to_stratum = process_stratum;
+ child_ops.DONT_USE = 0;
+ child_ops.to_has_all_memory = 1;
+ child_ops.to_has_memory = 1;
+ child_ops.to_has_stack = 1;
+ child_ops.to_has_registers = 1;
+ child_ops.to_has_execution = 1;
+ child_ops.to_sections = 0;
+ child_ops.to_sections_end = 0;
+ child_ops.to_magic = OPS_MAGIC;
+}
void
_initialize_inftarg ()
{
struct cmd_list_element *c;
+ init_child_ops() ;
add_show_from_set
(add_set_cmd ("new-console", class_support, var_boolean,
add_target (&child_ops);
}
+
+/* Determine if the thread referenced by "pid" is alive
+ by "polling" it. If WaitForSingleObject returns WAIT_OBJECT_0
+ it means that the pid has died. Otherwise it is assumed to be alive. */
+static int
+child_thread_alive (int pid)
+{
+ return WaitForSingleObject(thread_rec (pid, FALSE)->h, 0) == WAIT_OBJECT_0 ?
+ FALSE : TRUE;
+}
+
+/* Convert pid to printable format. */
+char *
+cygwin_pid_to_str (int pid)
+{
+ static char buf[80];
+ if (pid == current_event.dwProcessId)
+ sprintf (buf, "process %d", pid);
+ else
+ sprintf (buf, "thread %d.0x%x", current_event.dwProcessId, pid);
+ return buf;
+}
projects / deliverable / binutils-gdb.git / blobdiff