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Sweden-Number/debugger/winedbg.c

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/* -*- tab-width: 8; c-basic-offset: 4 -*- */
/* Wine internal debugger
* Interface to Windows debugger API
* Eric Pouech (c) 2000
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "debugger.h"
#include "thread.h"
#include "process.h"
#include "wincon.h"
#include "wingdi.h"
#include "winuser.h"
#include "winreg.h"
#ifdef DBG_need_heap
HANDLE dbg_heap = 0;
#endif
DBG_PROCESS* DEBUG_CurrProcess = NULL;
DBG_THREAD* DEBUG_CurrThread = NULL;
DWORD DEBUG_CurrTid;
DWORD DEBUG_CurrPid;
CONTEXT DEBUG_context;
static DBG_PROCESS* proc = NULL;
DBG_INTVAR DEBUG_IntVars[DBG_IV_LAST];
void DEBUG_Output(int chn, const char* buffer, int len)
{
if (DBG_IVAR(ConChannelMask) & chn)
WriteFile(GetStdHandle(STD_OUTPUT_HANDLE), buffer, len, NULL, NULL);
if (DBG_IVAR(StdChannelMask) & chn)
fwrite(buffer, len, 1, stderr);
}
int DEBUG_Printf(int chn, const char* format, ...)
{
char buf[1024];
va_list valist;
int len;
va_start(valist, format);
len = wvsnprintf(buf, sizeof(buf), format, valist);
va_end(valist);
if (len <= -1) {
len = sizeof(buf) - 1;
buf[len] = 0;
buf[len - 1] = buf[len - 2] = buf[len - 3] = '.';
}
DEBUG_Output(chn, buf, len);
return len;
}
static BOOL DEBUG_IntVarsRW(int read)
{
HKEY hkey;
DWORD type = REG_DWORD;
DWORD val;
DWORD count = sizeof(val);
int i;
DBG_INTVAR* div = DEBUG_IntVars;
if (read) {
/* initializes internal vars table */
#define INTERNAL_VAR(_var,_val,_ref,_typ) \
div->val = _val; div->name = #_var; div->pval = _ref; \
div->type = _typ; div++;
#include "intvar.h"
#undef INTERNAL_VAR
}
if (RegCreateKeyA(HKEY_CURRENT_USER, "Software\\Wine\\WineDbg", &hkey)) {
/* since the IVars are not yet setup, DEBUG_Printf doesn't work,
* so don't use it */
fprintf(stderr, "Cannot create WineDbg key in registry\n");
return FALSE;
}
for (i = 0; i < DBG_IV_LAST; i++) {
if (read) {
if (!DEBUG_IntVars[i].pval) {
if (!RegQueryValueEx(hkey, DEBUG_IntVars[i].name, 0,
&type, (LPSTR)&val, &count))
DEBUG_IntVars[i].val = val;
DEBUG_IntVars[i].pval = &DEBUG_IntVars[i].val;
} else {
*DEBUG_IntVars[i].pval = 0;
}
} else {
/* FIXME: type should be infered from basic type -if any- of intvar */
if (DEBUG_IntVars[i].pval == &DEBUG_IntVars[i].val)
RegSetValueEx(hkey, DEBUG_IntVars[i].name, 0,
type, (LPCVOID)DEBUG_IntVars[i].pval, count);
}
}
RegCloseKey(hkey);
return TRUE;
}
DBG_INTVAR* DEBUG_GetIntVar(const char* name)
{
int i;
for (i = 0; i < DBG_IV_LAST; i++) {
if (!strcmp(DEBUG_IntVars[i].name, name))
return &DEBUG_IntVars[i];
}
return NULL;
}
static WINE_EXCEPTION_FILTER(wine_dbg)
{
DEBUG_Printf(DBG_CHN_MESG, "\nwine_dbg: Exception (%lx) inside debugger, continuing...\n", GetExceptionCode());
DEBUG_ExternalDebugger();
return EXCEPTION_EXECUTE_HANDLER;
}
static DBG_PROCESS* DEBUG_GetProcess(DWORD pid)
{
DBG_PROCESS* p;
for (p = proc; p; p = p->next)
if (p->pid == pid) break;
return p;
}
static DBG_PROCESS* DEBUG_AddProcess(DWORD pid, HANDLE h)
{
DBG_PROCESS* p = DBG_alloc(sizeof(DBG_PROCESS));
if (!p)
return NULL;
p->handle = h;
p->pid = pid;
p->threads = NULL;
p->num_threads = 0;
p->continue_on_first_exception = FALSE;
p->modules = NULL;
p->next_index = 0;
p->dbg_hdr_addr = 0;
p->next = proc;
p->prev = NULL;
if (proc) proc->prev = p;
proc = p;
return p;
}
static void DEBUG_DelThread(DBG_THREAD* p);
static void DEBUG_DelProcess(DBG_PROCESS* p)
{
if (p->threads != NULL) {
DEBUG_Printf(DBG_CHN_ERR, "Shouldn't happen\n");
while (p->threads) DEBUG_DelThread(p->threads);
}
if (p->prev) p->prev->next = p->next;
if (p->next) p->next->prev = p->prev;
if (p == proc) proc = p->next;
DBG_free(p);
}
static void DEBUG_InitCurrProcess(void)
{
}
static BOOL DEBUG_ProcessGetString(char* buffer, int size, HANDLE hp, LPSTR addr)
{
DWORD sz;
*(WCHAR*)buffer = 0;
return (addr && ReadProcessMemory(hp, addr, buffer, size, &sz));
}
static BOOL DEBUG_ProcessGetStringIndirect(char* buffer, int size, HANDLE hp, LPVOID addr)
{
LPVOID ad;
DWORD sz;
if ( addr
&& ReadProcessMemory(hp, addr, &ad, sizeof(ad), &sz)
&& sz == sizeof(ad)
&& ad
&& ReadProcessMemory(hp, ad, buffer, size, &sz))
return TRUE;
*(WCHAR*)buffer = 0;
return FALSE;
}
static DBG_THREAD* DEBUG_GetThread(DBG_PROCESS* p, DWORD tid)
{
DBG_THREAD* t;
for (t = p->threads; t; t = t->next)
if (t->tid == tid) break;
return t;
}
static DBG_THREAD* DEBUG_AddThread(DBG_PROCESS* p, DWORD tid,
HANDLE h, LPVOID start, LPVOID teb)
{
DBG_THREAD* t = DBG_alloc(sizeof(DBG_THREAD));
if (!t)
return NULL;
t->handle = h;
t->tid = tid;
t->start = start;
t->teb = teb;
t->process = p;
t->wait_for_first_exception = 0;
t->dbg_exec_mode = EXEC_CONT;
t->dbg_exec_count = 0;
p->num_threads++;
t->next = p->threads;
t->prev = NULL;
if (p->threads) p->threads->prev = t;
p->threads = t;
return t;
}
static void DEBUG_InitCurrThread(void)
{
if (DEBUG_CurrThread->start) {
if (DEBUG_CurrThread->process->num_threads == 1 ||
DBG_IVAR(BreakAllThreadsStartup)) {
DBG_VALUE value;
DEBUG_SetBreakpoints(FALSE);
value.type = NULL;
value.cookie = DV_TARGET;
value.addr.seg = 0;
value.addr.off = (DWORD)DEBUG_CurrThread->start;
DEBUG_AddBreakpoint(&value, NULL);
DEBUG_SetBreakpoints(TRUE);
}
} else {
DEBUG_CurrThread->wait_for_first_exception = 1;
}
}
static void DEBUG_DelThread(DBG_THREAD* t)
{
if (t->prev) t->prev->next = t->next;
if (t->next) t->next->prev = t->prev;
if (t == t->process->threads) t->process->threads = t->next;
t->process->num_threads--;
DBG_free(t);
}
static BOOL DEBUG_HandleException( EXCEPTION_RECORD *rec, BOOL first_chance, BOOL force )
{
BOOL is_debug = FALSE;
BOOL ret;
/* FIXME: need for a configuration var ? */
/* pass to app first ??? */
/* if (first_chance && !force) return 0; */
switch (rec->ExceptionCode)
{
case EXCEPTION_BREAKPOINT:
case EXCEPTION_SINGLE_STEP:
is_debug = TRUE;
break;
}
if (!is_debug)
{
/* print some infos */
DEBUG_Printf( DBG_CHN_MESG, "%s: ",
first_chance ? "First chance exception" : "Unhandled exception" );
switch (rec->ExceptionCode)
{
case EXCEPTION_INT_DIVIDE_BY_ZERO:
DEBUG_Printf( DBG_CHN_MESG, "divide by zero" );
break;
case EXCEPTION_INT_OVERFLOW:
DEBUG_Printf( DBG_CHN_MESG, "overflow" );
break;
case EXCEPTION_ARRAY_BOUNDS_EXCEEDED:
DEBUG_Printf( DBG_CHN_MESG, "array bounds " );
break;
case EXCEPTION_ILLEGAL_INSTRUCTION:
DEBUG_Printf( DBG_CHN_MESG, "illegal instruction" );
break;
case EXCEPTION_STACK_OVERFLOW:
DEBUG_Printf( DBG_CHN_MESG, "stack overflow" );
break;
case EXCEPTION_PRIV_INSTRUCTION:
DEBUG_Printf( DBG_CHN_MESG, "priviledged instruction" );
break;
case EXCEPTION_ACCESS_VIOLATION:
if (rec->NumberParameters == 2)
DEBUG_Printf( DBG_CHN_MESG, "page fault on %s access to 0x%08lx",
rec->ExceptionInformation[0] ? "write" : "read",
rec->ExceptionInformation[1] );
else
DEBUG_Printf( DBG_CHN_MESG, "page fault" );
break;
case EXCEPTION_DATATYPE_MISALIGNMENT:
DEBUG_Printf( DBG_CHN_MESG, "Alignment" );
break;
case CONTROL_C_EXIT:
DEBUG_Printf( DBG_CHN_MESG, "^C" );
break;
case EXCEPTION_CRITICAL_SECTION_WAIT:
DEBUG_Printf( DBG_CHN_MESG, "critical section %08lx wait failed",
rec->ExceptionInformation[0] );
if (!DBG_IVAR(BreakOnCritSectTimeOut))
return DBG_CONTINUE;
break;
default:
DEBUG_Printf( DBG_CHN_MESG, "%08lx", rec->ExceptionCode );
break;
}
DEBUG_Printf(DBG_CHN_MESG, "\n");
}
DEBUG_Printf(DBG_CHN_TRACE,
"Entering debugger PC=%lx EFL=%08lx mode=%d count=%d\n",
DEBUG_context.Eip, DEBUG_context.EFlags,
DEBUG_CurrThread->dbg_exec_mode, DEBUG_CurrThread->dbg_exec_count);
ret = DEBUG_Main( is_debug, force, rec->ExceptionCode );
DEBUG_Printf(DBG_CHN_TRACE,
"Exiting debugger PC=%lx EFL=%08lx mode=%d count=%d\n",
DEBUG_context.Eip, DEBUG_context.EFlags,
DEBUG_CurrThread->dbg_exec_mode, DEBUG_CurrThread->dbg_exec_count);
return ret;
}
static BOOL DEBUG_HandleDebugEvent(DEBUG_EVENT* de, LPDWORD cont)
{
char buffer[256];
BOOL ret;
DEBUG_CurrPid = de->dwProcessId;
DEBUG_CurrTid = de->dwThreadId;
__TRY {
ret = TRUE;
*cont = 0L;
if ((DEBUG_CurrProcess = DEBUG_GetProcess(de->dwProcessId)) != NULL)
DEBUG_CurrThread = DEBUG_GetThread(DEBUG_CurrProcess, de->dwThreadId);
else
DEBUG_CurrThread = NULL;
switch (de->dwDebugEventCode) {
case EXCEPTION_DEBUG_EVENT:
if (!DEBUG_CurrThread) {
DEBUG_Printf(DBG_CHN_ERR, "%08lx:%08lx: not a registered process or thread (perhaps a 16 bit one ?)\n",
de->dwProcessId, de->dwThreadId);
break;
}
DEBUG_Printf(DBG_CHN_TRACE, "%08lx:%08lx: exception code=%08lx\n",
de->dwProcessId, de->dwThreadId,
de->u.Exception.ExceptionRecord.ExceptionCode);
if (DEBUG_CurrProcess->continue_on_first_exception) {
DEBUG_CurrProcess->continue_on_first_exception = FALSE;
if (!DBG_IVAR(BreakOnAttach)) {
*cont = DBG_CONTINUE;
break;
}
}
DEBUG_context.ContextFlags = CONTEXT_CONTROL|CONTEXT_INTEGER|CONTEXT_SEGMENTS|CONTEXT_DEBUG_REGISTERS;
if (!GetThreadContext(DEBUG_CurrThread->handle, &DEBUG_context)) {
DEBUG_Printf(DBG_CHN_WARN, "Can't get thread's context\n");
break;
}
*cont = DEBUG_HandleException(&de->u.Exception.ExceptionRecord,
de->u.Exception.dwFirstChance,
DEBUG_CurrThread->wait_for_first_exception);
if (DEBUG_CurrThread->dbg_exec_mode == EXEC_KILL) {
ret = FALSE;
} else {
DEBUG_CurrThread->wait_for_first_exception = 0;
SetThreadContext(DEBUG_CurrThread->handle, &DEBUG_context);
}
break;
case CREATE_THREAD_DEBUG_EVENT:
DEBUG_Printf(DBG_CHN_TRACE, "%08lx:%08lx: create thread D @%08lx\n", de->dwProcessId, de->dwThreadId,
(unsigned long)(LPVOID)de->u.CreateThread.lpStartAddress);
if (DEBUG_CurrProcess == NULL) {
DEBUG_Printf(DBG_CHN_ERR, "Unknown process\n");
break;
}
if (DEBUG_GetThread(DEBUG_CurrProcess, de->dwThreadId) != NULL) {
DEBUG_Printf(DBG_CHN_TRACE, "Thread already listed, skipping\n");
break;
}
DEBUG_CurrThread = DEBUG_AddThread(DEBUG_CurrProcess,
de->dwThreadId,
de->u.CreateThread.hThread,
de->u.CreateThread.lpStartAddress,
de->u.CreateThread.lpThreadLocalBase);
if (!DEBUG_CurrThread) {
DEBUG_Printf(DBG_CHN_ERR, "Couldn't create thread\n");
break;
}
DEBUG_InitCurrThread();
break;
case CREATE_PROCESS_DEBUG_EVENT:
DEBUG_ProcessGetStringIndirect(buffer, sizeof(buffer),
de->u.CreateProcessInfo.hProcess,
de->u.CreateProcessInfo.lpImageName);
/* FIXME unicode ? de->u.CreateProcessInfo.fUnicode */
DEBUG_Printf(DBG_CHN_TRACE, "%08lx:%08lx: create process %s @%08lx (%ld<%ld>)\n",
de->dwProcessId, de->dwThreadId,
buffer,
(unsigned long)(LPVOID)de->u.CreateProcessInfo.lpStartAddress,
de->u.CreateProcessInfo.dwDebugInfoFileOffset,
de->u.CreateProcessInfo.nDebugInfoSize);
if ((DEBUG_CurrProcess = DEBUG_GetProcess(de->dwProcessId)) != NULL) {
if (DEBUG_CurrProcess->handle) {
DEBUG_Printf(DBG_CHN_ERR, "Skipping already defined process\n");
break;
}
DEBUG_CurrProcess->handle = de->u.CreateProcessInfo.hProcess;
} else {
DEBUG_CurrProcess = DEBUG_AddProcess(de->dwProcessId,
de->u.CreateProcessInfo.hProcess);
if (DEBUG_CurrProcess == NULL) {
DEBUG_Printf(DBG_CHN_ERR, "Unknown process\n");
break;
}
}
DEBUG_Printf(DBG_CHN_TRACE, "%08lx:%08lx: create thread I @%08lx\n",
de->dwProcessId, de->dwThreadId,
(unsigned long)(LPVOID)de->u.CreateProcessInfo.lpStartAddress);
DEBUG_CurrThread = DEBUG_AddThread(DEBUG_CurrProcess,
de->dwThreadId,
de->u.CreateProcessInfo.hThread,
de->u.CreateProcessInfo.lpStartAddress,
de->u.CreateProcessInfo.lpThreadLocalBase);
if (!DEBUG_CurrThread) {
DEBUG_Printf(DBG_CHN_ERR, "Couldn't create thread\n");
break;
}
DEBUG_InitCurrProcess();
DEBUG_InitCurrThread();
/* so far, process name is not set */
DEBUG_LoadModule32("<Debugged process>", de->u.CreateProcessInfo.hFile,
(DWORD)de->u.CreateProcessInfo.lpBaseOfImage);
break;
case EXIT_THREAD_DEBUG_EVENT:
DEBUG_Printf(DBG_CHN_TRACE, "%08lx:%08lx: exit thread (%ld)\n",
de->dwProcessId, de->dwThreadId, de->u.ExitThread.dwExitCode);
if (DEBUG_CurrThread == NULL) {
DEBUG_Printf(DBG_CHN_ERR, "Unknown thread\n");
break;
}
/* FIXME: remove break point set on thread startup */
DEBUG_DelThread(DEBUG_CurrThread);
break;
case EXIT_PROCESS_DEBUG_EVENT:
DEBUG_Printf(DBG_CHN_TRACE, "%08lx:%08lx: exit process (%ld)\n",
de->dwProcessId, de->dwThreadId, de->u.ExitProcess.dwExitCode);
if (DEBUG_CurrProcess == NULL) {
DEBUG_Printf(DBG_CHN_ERR, "Unknown process\n");
break;
}
/* just in case */
DEBUG_SetBreakpoints(FALSE);
/* kill last thread */
DEBUG_DelThread(DEBUG_CurrProcess->threads);
DEBUG_DelProcess(DEBUG_CurrProcess);
ret = FALSE;
break;
case LOAD_DLL_DEBUG_EVENT:
if (DEBUG_CurrThread == NULL) {
DEBUG_Printf(DBG_CHN_ERR, "Unknown thread\n");
break;
}
DEBUG_ProcessGetStringIndirect(buffer, sizeof(buffer),
DEBUG_CurrThread->process->handle,
de->u.LoadDll.lpImageName);
/* FIXME unicode: de->u.LoadDll.fUnicode */
DEBUG_Printf(DBG_CHN_TRACE, "%08lx:%08lx: loads DLL %s @%08lx (%ld<%ld>)\n",
de->dwProcessId, de->dwThreadId,
buffer, (unsigned long)de->u.LoadDll.lpBaseOfDll,
de->u.LoadDll.dwDebugInfoFileOffset,
de->u.LoadDll.nDebugInfoSize);
CharUpper(buffer);
DEBUG_LoadModule32(buffer, de->u.LoadDll.hFile, (DWORD)de->u.LoadDll.lpBaseOfDll);
break;
case UNLOAD_DLL_DEBUG_EVENT:
DEBUG_Printf(DBG_CHN_TRACE, "%08lx:%08lx: unload DLL @%08lx\n", de->dwProcessId, de->dwThreadId,
(unsigned long)de->u.UnloadDll.lpBaseOfDll);
break;
case OUTPUT_DEBUG_STRING_EVENT:
if (DEBUG_CurrThread == NULL) {
DEBUG_Printf(DBG_CHN_ERR, "Unknown thread\n");
break;
}
DEBUG_ProcessGetString(buffer, sizeof(buffer),
DEBUG_CurrThread->process->handle,
de->u.DebugString.lpDebugStringData);
/* fixme unicode de->u.DebugString.fUnicode ? */
DEBUG_Printf(DBG_CHN_TRACE, "%08lx:%08lx: output debug string (%s)\n",
de->dwProcessId, de->dwThreadId, buffer);
break;
case RIP_EVENT:
DEBUG_Printf(DBG_CHN_TRACE, "%08lx:%08lx: rip error=%ld type=%ld\n",
de->dwProcessId, de->dwThreadId, de->u.RipInfo.dwError,
de->u.RipInfo.dwType);
break;
default:
DEBUG_Printf(DBG_CHN_TRACE, "%08lx:%08lx: unknown event (%ld)\n",
de->dwProcessId, de->dwThreadId, de->dwDebugEventCode);
}
} __EXCEPT(wine_dbg) {
*cont = 0;
ret = TRUE;
}
__ENDTRY;
return ret;
}
static DWORD DEBUG_MainLoop(DWORD pid)
{
DEBUG_EVENT de;
DWORD cont;
BOOL ret = TRUE;
DEBUG_Printf(DBG_CHN_MESG, " on pid %ld\n", pid);
while (ret && WaitForDebugEvent(&de, INFINITE)) {
ret = DEBUG_HandleDebugEvent(&de, &cont);
ContinueDebugEvent(de.dwProcessId, de.dwThreadId, cont);
}
DEBUG_Printf(DBG_CHN_MESG, "WineDbg terminated on pid %ld\n", pid);
return 0;
}
int DEBUG_main(int argc, char** argv)
{
DWORD pid = 0, retv = 0;
#ifdef DBG_need_heap
/* Initialize the debugger heap. */
dbg_heap = HeapCreate(HEAP_NO_SERIALIZE, 0x1000, 0x8000000); /* 128MB */
#endif
/* Initialize the type handling stuff. */
DEBUG_InitTypes();
DEBUG_InitCVDataTypes();
/* Initialize internal vars (types must be initialized before) */
if (!DEBUG_IntVarsRW(TRUE)) return -1;
/* keep it as a guiexe for now, so that Wine won't touch the Unix stdin,
* stdout and stderr streams
*/
if (DBG_IVAR(UseXTerm)) {
COORD pos;
/* This is a hack: it forces creation of an xterm, not done by default */
pos.X = 0; pos.Y = 1;
SetConsoleCursorPosition(GetStdHandle(STD_OUTPUT_HANDLE), pos);
}
DEBUG_Printf(DBG_CHN_MESG, "Starting WineDbg... ");
if (argc == 3) {
HANDLE hEvent;
if ((pid = atoi(argv[1])) != 0 && (hEvent = atoi(argv[2])) != 0) {
if (!(DEBUG_CurrProcess = DEBUG_AddProcess(pid, 0))) goto leave;
DEBUG_CurrProcess->continue_on_first_exception = TRUE;
if (!DebugActiveProcess(pid)) {
DEBUG_Printf(DBG_CHN_ERR, "Can't attach process %ld: %ld\n",
pid, GetLastError());
SetEvent(hEvent);
goto leave;
}
SetEvent(hEvent);
} else {
pid = 0;
}
}
if (argc == 1) {
LPSTR org, ptr;
DEBUG_Printf(DBG_CHN_MESG, "\n");
DEBUG_WalkProcess();
pid = strtol(org = readline("Enter pid to debug: "), &ptr, 0);
if (pid && ptr && ptr != org && *ptr == '\0') {
if (!(DEBUG_CurrProcess = DEBUG_AddProcess(pid, 0))) goto leave;
if (!DebugActiveProcess(pid)) {
DEBUG_Printf(DBG_CHN_ERR, "Can't attach process %ld: %ld\n",
pid, GetLastError());
goto leave;
}
} else {
pid = 0;
}
}
if (pid == 0) {
PROCESS_INFORMATION info;
STARTUPINFOA startup;
memset(&startup, 0, sizeof(startup));
startup.cb = sizeof(startup);
startup.dwFlags = STARTF_USESHOWWINDOW;
startup.wShowWindow = SW_SHOWNORMAL;
if (!CreateProcess(NULL, argv[1], NULL, NULL,
FALSE, DEBUG_PROCESS, NULL, NULL, &startup, &info)) {
DEBUG_Printf(DBG_CHN_MESG, "Couldn't start process '%s'\n", argv[1]);
goto leave;
}
pid = info.dwProcessId;
}
if (pid) retv = DEBUG_MainLoop(pid);
leave:
/* saves modified variables */
DEBUG_IntVarsRW(FALSE);
return retv;
}
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