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import gdb-1999-12-06 snapshot

gdb-premipsmulti-2000-06-06-branch
Jason Molenda 27 years ago
parent
2a6d49ea17
commit
1e37c28164
1 changed files with 304 additions and 143 deletions
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  1. 447
      gdb/windows-nat.c

447
gdb/windows-nat.c
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@ -40,6 +40,7 @@
#include "windefs.h"
#else /* other WIN32 compiler */
#include <windows.h>
#include <imagehlp.h>
#endif
#include "buildsym.h"
@ -49,6 +50,7 @@
#include "gdbthread.h"
#include "gdbcmd.h"
#include <sys/param.h>
#include <unistd.h>
/* The ui's event loop. */
extern int (*ui_loop_hook) PARAMS ((int signo));
@ -78,9 +80,6 @@ static void child_stop PARAMS ((void));
static int win32_child_thread_alive PARAMS ((int));
void child_kill_inferior PARAMS ((void));
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
@ -91,11 +90,13 @@ typedef struct thread_info_struct
char *name;
int suspend_count;
CONTEXT context;
}
thread_info;
STACKFRAME sf;
} thread_info;
static thread_info thread_head = {NULL};
static thread_info thread_head =
{NULL};
/* The saved state for a continue after breaking back to gdb. */
static DWORD continue_status;
/* The process and thread handles for the above context. */
@ -111,7 +112,7 @@ static int event_count = 0;
/* User options. */
static int new_console = 0;
static int new_group = 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 */
@ -157,6 +158,13 @@ static const int mappings[] =
context_offset (FloatSave.RegisterArea[5 * 10]),
context_offset (FloatSave.RegisterArea[6 * 10]),
context_offset (FloatSave.RegisterArea[7 * 10]),
context_offset (FloatSave.ControlWord),
context_offset (FloatSave.StatusWord),
context_offset (FloatSave.TagWord),
context_offset (FloatSave.ErrorSelector),
context_offset (FloatSave.ErrorOffset),
context_offset (FloatSave.DataSelector),
context_offset (FloatSave.DataOffset),
};
/* This vector maps the target's idea of an exception (extracted
@ -276,7 +284,19 @@ check (BOOL ok, const char *file, int line)
static void
do_child_fetch_inferior_registers (int r)
{
if (r >= 0)
char *context_offset = ((char *) &current_thread->context) + mappings[r];
long l;
if (r == FCS_REGNUM)
{
l = *((long *)context_offset) & 0xffff;
supply_register (r, (char *) &l);
}
else if (r == FOP_REGNUM)
{
l = (*((long *)context_offset) >> 16) & ((1 << 11) - 1);
supply_register (r, (char *) &l);
}
else if (r >= 0)
supply_register (r, ((char *) &current_thread->context) + mappings[r]);
else
{
@ -312,6 +332,90 @@ child_store_inferior_registers (int r)
do_child_store_inferior_registers (r);
}
#include <psapi.h>
static int psapi_loaded = 0;
static HMODULE psapi_module_handle = NULL;
static BOOL WINAPI (*psapi_EnumProcessModules)(HANDLE, HMODULE*, DWORD, LPDWORD)= NULL;
static BOOL WINAPI (*psapi_GetModuleInformation) (HANDLE, HMODULE, LPMODULEINFO, DWORD)= NULL;
static DWORD WINAPI (*psapi_GetModuleFileNameExA) (HANDLE, HMODULE, LPSTR, DWORD)= NULL;
int psapi_get_dll_name (DWORD BaseAddress, char *dll_name_ret)
{
DWORD len;
MODULEINFO mi;
int i;
HMODULE dh_buf [ 1 ];
HMODULE* DllHandle = dh_buf;
DWORD cbNeeded;
BOOL ok;
if (!psapi_loaded ||
psapi_EnumProcessModules == NULL ||
psapi_GetModuleInformation == NULL ||
psapi_GetModuleFileNameExA == NULL)
{
if (psapi_loaded)goto failed;
psapi_loaded = 1;
psapi_module_handle = LoadLibrary ("psapi.dll");
if (!psapi_module_handle)
{
/* printf_unfiltered ("error loading psapi.dll: %u", GetLastError ());*/
goto failed;
}
psapi_EnumProcessModules = GetProcAddress (psapi_module_handle, "EnumProcessModules" );
psapi_GetModuleInformation = GetProcAddress (psapi_module_handle, "GetModuleInformation");
psapi_GetModuleFileNameExA = (void *) GetProcAddress (psapi_module_handle,
"GetModuleFileNameExA");
if (psapi_EnumProcessModules == NULL ||
psapi_GetModuleInformation == NULL ||
psapi_GetModuleFileNameExA == NULL)
goto failed;
}
cbNeeded = 0;
ok = (*psapi_EnumProcessModules) (current_process_handle,
DllHandle,
sizeof (HMODULE),
&cbNeeded);
if (!ok || !cbNeeded)
goto failed;
DllHandle = (HMODULE*) alloca (cbNeeded);
if (!DllHandle)
goto failed;
ok = (*psapi_EnumProcessModules) (current_process_handle,
DllHandle,
cbNeeded,
&cbNeeded);
if (!ok)
goto failed;
for (i = 0; i < cbNeeded / sizeof (HMODULE); i++)
{
if (!(*psapi_GetModuleInformation) (current_process_handle,
DllHandle [i],
&mi,
sizeof (mi)))
error ("Can't get module info");
len = (*psapi_GetModuleFileNameExA) (current_process_handle,
DllHandle [i],
dll_name_ret,
MAX_PATH);
if (len == 0)
error ("Error getting dll name: %u\n", GetLastError ());
if ((DWORD) (mi.lpBaseOfDll) == BaseAddress)
return 1;
}
failed:
dll_name_ret[0] = '\0';
return 0;
}
/* Wait for child to do something. Return pid of child, or -1 in case
of error; store status through argument pointer OURSTATUS. */
@ -330,25 +434,10 @@ handle_load_dll (PTR dummy)
memset (&section_addrs, 0, sizeof (section_addrs));
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 (!psapi_get_dll_name ((DWORD) (event->lpBaseOfDll), dll_buf))
dll_buf[0] = dll_buf[sizeof(dll_buf) - 1] = '\0';
if ((len = GetModuleFileName (hmm, dll_buf, MAX_PATH)))
{
dll_name = dll_buf;
dll_name[len] = '\0';
}
}
#endif
dll_name = dll_buf;
/* Attempt to read the name of the dll that was detected.
This is documented to work only when actively debugging
@ -442,13 +531,13 @@ handle_output_debug_string (struct target_waitstatus *ourstatus)
if (strncmp (s, CYGWIN_SIGNAL_STRING, sizeof (CYGWIN_SIGNAL_STRING) - 1))
{
warning (s);
if (strncmp (s, "cYg", 3))
warning (s);
}
else
{
char *p;
/*last_sig = */ strtol (s + sizeof (CYGWIN_SIGNAL_STRING) - 1, &p, 0);
gotasig = target_signal_from_host (last_sig);
int sig = strtol (s + sizeof (CYGWIN_SIGNAL_STRING) - 1, &p, 0);
gotasig = target_signal_from_host (sig);
ourstatus->value.sig = gotasig;
if (gotasig)
ourstatus->kind = TARGET_WAITKIND_STOPPED;
@ -476,11 +565,13 @@ handle_exception (struct target_waitstatus *ourstatus)
DEBUG_EXCEPT (("gdb: Target exception ACCESS_VIOLATION at 0x%08x\n",
current_event.u.Exception.ExceptionRecord.ExceptionAddress));
ourstatus->value.sig = TARGET_SIGNAL_SEGV;
continue_status = DBG_EXCEPTION_NOT_HANDLED;
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;
continue_status = DBG_EXCEPTION_NOT_HANDLED;
break;
case EXCEPTION_BREAKPOINT:
DEBUG_EXCEPT (("gdb: Target exception BREAKPOINT at 0x%08x\n",
@ -491,8 +582,7 @@ handle_exception (struct target_waitstatus *ourstatus)
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 */
continue_status = DBG_EXCEPTION_NOT_HANDLED;
break;
case EXCEPTION_SINGLE_STEP:
DEBUG_EXCEPT (("gdb: Target exception SINGLE_STEP at 0x%08x\n",
@ -510,6 +600,7 @@ handle_exception (struct target_waitstatus *ourstatus)
current_event.u.Exception.ExceptionRecord.ExceptionCode,
current_event.u.Exception.ExceptionRecord.ExceptionAddress);
ourstatus->value.sig = TARGET_SIGNAL_UNKNOWN;
continue_status = DBG_EXCEPTION_NOT_HANDLED;
break;
}
exception_count++;
@ -519,7 +610,7 @@ handle_exception (struct target_waitstatus *ourstatus)
/* Resume all artificially suspended threads if we are continuing
execution */
static BOOL
child_continue (DWORD continue_status, int id)
child_continue (int id)
{
int i;
thread_info *th;
@ -530,6 +621,7 @@ child_continue (DWORD continue_status, int id)
res = ContinueDebugEvent (current_event.dwProcessId,
current_event.dwThreadId,
continue_status);
continue_status = 0;
if (res)
for (th = &thread_head; (th = th->next) != NULL;)
if (((id == -1) || (id == th->id)) && th->suspend_count)
@ -542,9 +634,134 @@ child_continue (DWORD continue_status, int id)
return res;
}
static int
get_child_debug_event (int pid, struct target_waitstatus *ourstatus,
DWORD *event_code, int *retval)
{
BOOL debug_event;
int breakout = 1;
if (!(debug_event = WaitForDebugEvent (&current_event, 20)))
{
breakout = *retval = *event_code = 0;
goto out;
}
event_count++;
continue_status = DBG_CONTINUE;
*retval = 0;
switch (*event_code = current_event.dwDebugEventCode)
{
case CREATE_THREAD_DEBUG_EVENT:
DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%x code=%s)\n",
(unsigned) current_event.dwProcessId,
(unsigned) 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",
(unsigned) current_event.dwProcessId,
(unsigned) 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",
(unsigned) current_event.dwProcessId,
(unsigned) 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",
(unsigned) current_event.dwProcessId,
(unsigned) current_event.dwThreadId,
"EXIT_PROCESS_DEBUG_EVENT"));
ourstatus->kind = TARGET_WAITKIND_EXITED;
ourstatus->value.integer = current_event.u.ExitProcess.dwExitCode;
CloseHandle (current_process_handle);
*retval = current_event.dwProcessId;
goto out;
case LOAD_DLL_DEBUG_EVENT:
DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n",
(unsigned) current_event.dwProcessId,
(unsigned) 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",
(unsigned) current_event.dwProcessId,
(unsigned) 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",
(unsigned) current_event.dwProcessId,
(unsigned) current_event.dwThreadId,
"EXCEPTION_DEBUG_EVENT"));
if (handle_exception (ourstatus)) /* sets continue_status */
{
*retval = current_event.dwThreadId;
goto out;
}
break;
case OUTPUT_DEBUG_STRING_EVENT:
DEBUG_EVENTS (("gdb: kernel event for pid=%d tid=%d code=%s)\n",
(unsigned) current_event.dwProcessId,
(unsigned) current_event.dwThreadId,
"OUTPUT_DEBUG_STRING_EVENT"));
if (handle_output_debug_string (ourstatus))
{
*retval = main_thread_id;
goto out;
}
break;
default:
printf_unfiltered ("gdb: kernel event for pid=%d tid=%d\n",
current_event.dwProcessId,
current_event.dwThreadId);
printf_unfiltered (" unknown event code %d\n",
current_event.dwDebugEventCode);
break;
}
breakout = 0;
CHECK (child_continue (-1));
continue_status = 0;
out:
return breakout;
}
/* Wait for interesting events to occur in the target process. */
static int
child_wait (int pid, struct target_waitstatus *ourstatus)
{
DWORD event_code;
int retval;
/* 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
@ -553,102 +770,10 @@ child_wait (int pid, struct target_waitstatus *ourstatus)
while (1)
{
DWORD continue_status;
BOOL debug_event = WaitForDebugEvent (&current_event, 20);
char *p;
thread_info *th;
int sig;
if (debug_event)
{
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",
current_event.dwProcessId, current_event.dwThreadId,
"EXCEPTION_DEBUG_EVENT"));
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",
current_event.dwProcessId, current_event.dwThreadId,
"OUTPUT_DEBUG_STRING_EVENT"));
if (handle_output_debug_string (ourstatus))
return main_thread_id;
break;
default:
printf_unfiltered ("gdb: kernel event for pid=%d tid=%d\n",
current_event.dwProcessId,
current_event.dwThreadId);
printf_unfiltered (" unknown event code %d\n",
current_event.dwDebugEventCode);
break;
}
CHECK (child_continue (continue_status, -1));
}
if (continue_status != 0)
CHECK (child_continue (-1));
if (get_child_debug_event (pid, ourstatus, &event_code, &retval))
return retval;
else
{
int detach = 0;
@ -754,13 +879,13 @@ child_create_inferior (exec_file, allargs, env)
char *temp;
int envlen;
int i;
STARTUPINFO si;
PROCESS_INFORMATION pi;
struct target_waitstatus dummy;
BOOL ret;
DWORD flags;
char *args;
DWORD event_code;
if (!exec_file)
{
@ -887,16 +1012,19 @@ child_create_inferior (exec_file, allargs, env)
target_terminal_init ();
target_terminal_inferior ();
/* Ignore the first trap */
child_wait (inferior_pid, &dummy);
/* Run until process and threads are loaded */
do
get_child_debug_event (inferior_pid, &dummy, &event_code, &ret);
while (event_code != EXCEPTION_DEBUG_EVENT);
proceed ((CORE_ADDR) -1, TARGET_SIGNAL_0, 0);
proceed ((CORE_ADDR) - 1, TARGET_SIGNAL_0, 0);
}
static void
child_mourn_inferior ()
{
(void) child_continue (DBG_CONTINUE, -1);
continue_status = DBG_CONTINUE;
(void) child_continue (-1);
unpush_target (&child_ops);
generic_mourn_inferior ();
}
@ -908,7 +1036,7 @@ static void
child_stop ()
{
DEBUG_EVENTS (("gdb: GenerateConsoleCtrlEvent (CTRLC_EVENT, 0)\n"));
CHECK (GenerateConsoleCtrlEvent (CTRL_C_EVENT, 0));
CHECK (GenerateConsoleCtrlEvent (CTRL_C_EVENT, current_event.dwProcessId));
registers_changed (); /* refresh register state */
}
@ -942,7 +1070,8 @@ child_kill_inferior (void)
for (;;)
{
if (!child_continue (DBG_CONTINUE, -1))
continue_status = DBG_CONTINUE;
if (!child_continue (-1))
break;
if (!WaitForDebugEvent (&current_event, INFINITE))
break;
@ -962,8 +1091,6 @@ child_resume (int pid, int step, enum target_signal sig)
{
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));
@ -987,11 +1114,8 @@ child_resume (int pid, int step, enum target_signal sig)
/* 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);
last_sig = 0;
child_continue (continue_status, pid);
child_continue (pid);
}
static void
@ -1131,3 +1255,40 @@ cygwin_pid_to_str (int pid)
sprintf (buf, "thread %d.0x%x", current_event.dwProcessId, pid);
return buf;
}
#ifdef NOTYET
CORE_ADDR
win32_read_fp ()
{
STACKFRAME *sf = current_thread->sf;
memset (&sf, 0, sizeof(sf));
sf->AddrPC.Offset = current_thread->context.Eip;
sf->AddrPC.Mode = AddrModeFlat;
sf->AddrStack.Offset = current_thread->context.Esp;
sf->AddrStack.Mode = AddrModeFlat;
sf->AddrFrame.Offset = current_thread->context.Ebp;
if (!StackWalk (IMAGE_FILE_MACHINE_I386, current_process_handle,
current->thread->h, sf, NULL, NULL,
SymFunctionTableAccess, SymGetModuleBase, NULL))
return NULL;
return (CORE_ADDR) sf.AddrFrame.Offset;
}
CORE_ADDR
child_frame_chain(struct frame_info *thisframe)
{
STACKFRAME *sf = current->thread->sf;
#if 0
sf.AddrPC.Offset = thisframe->pc;
sf.AddrPC.Mode = AddrModeFlat;
sf.AddrStack.Offset = thisframe->;
sf.AddrStack.Mode = AddrModeFlat;
sf.AddrFrame.Offset = cx->Ebp;
#endif
if (!StackWalk (IMAGE_FILE_MACHINE_I386, current_process_handle,
current->thread->h, &sf, NULL, NULL,
SymFunctionTableAccess, SymGetModuleBase, NULL))
return NULL;
return (CORE_ADDR) sf->AddrFrame.Offset;
}
#endif

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