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 <sys/stat.h>
#include "debugger.h"
#include "winbase.h"
#include "winreg.h"
#include "debugtools.h"
#include "options.h"
#ifdef DBG_need_heap
HANDLE dbg_heap = 0;
#endif
DEFAULT_DEBUG_CHANNEL(winedbg);
WINE_DBG_PROCESS* DEBUG_CurrProcess = NULL;
WINE_DBG_THREAD* DEBUG_CurrThread = NULL;
CONTEXT DEBUG_context;
static WINE_DBG_PROCESS* proc = NULL;
static WINE_DBG_PROCESS* DEBUG_GetProcess(DWORD pid)
{
WINE_DBG_PROCESS* p;
for (p = proc; p; p = p->next)
if (p->pid == pid) break;
return p;
}
static WINE_DBG_PROCESS* DEBUG_AddProcess(DWORD pid, HANDLE h)
{
WINE_DBG_PROCESS* p = DBG_alloc(sizeof(WINE_DBG_PROCESS));
if (!p)
return NULL;
p->handle = h;
p->pid = pid;
p->threads = NULL;
p->next = proc;
p->prev = NULL;
if (proc) proc->prev = p;
proc = p;
return p;
}
static void DEBUG_DelThread(WINE_DBG_THREAD* p);
static void DEBUG_DelProcess(WINE_DBG_PROCESS* p)
{
if (p->threads != NULL) {
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)
{
#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();
/*
* In some cases we can read the stabs information directly
* from the executable. If this is the case, we don't need
* to bother with trying to read a symbol file, as the stabs
* also have line number and local variable information.
* As long as gcc is used for the compiler, stabs will
* be the default. On SVr4, DWARF could be used, but we
* don't grok that yet, and in this case we fall back to using
* the wine.sym file.
*/
if( DEBUG_ReadExecutableDbgInfo() == FALSE )
{
char* symfilename = "wine.sym";
struct stat statbuf;
HKEY hWineConf, hkey;
DWORD count;
char symbolTableFile[256];
if (-1 == stat(symfilename, &statbuf) )
symfilename = LIBDIR "wine.sym";
strcpy(symbolTableFile, symfilename);
if (!RegOpenKeyA(HKEY_LOCAL_MACHINE, "Software\\Wine\\Wine\\Config", &hWineConf)) {
if (!RegOpenKeyA(hWineConf, "wine", &hkey)) {
count = sizeof(symbolTableFile);
RegQueryValueA(hkey, "SymbolTableFile", symbolTableFile, &count);
RegCloseKey(hkey);
}
RegCloseKey(hWineConf);
}
DEBUG_ReadSymbolTable(symbolTableFile);
}
DEBUG_LoadEntryPoints(NULL);
DEBUG_ProcessDeferredDebug();
}
static BOOL DEBUG_ProcessGetString(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 WINE_DBG_THREAD* DEBUG_GetThread(WINE_DBG_PROCESS* p, DWORD tid)
{
WINE_DBG_THREAD* t;
for (t = p->threads; t; t = t->next)
if (t->tid == tid) break;
return t;
}
static WINE_DBG_THREAD* DEBUG_AddThread(WINE_DBG_PROCESS* p, DWORD tid,
HANDLE h, LPVOID start, LPVOID teb)
{
WINE_DBG_THREAD* t = DBG_alloc(sizeof(WINE_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;
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 (!Options.debug) return;
if (DEBUG_CurrThread->start) {
DBG_ADDR addr;
DEBUG_SetBreakpoints(FALSE);
addr.seg = 0;
addr.off = (DWORD)DEBUG_CurrThread->start;
DEBUG_AddBreakpoint(&addr);
DEBUG_SetBreakpoints(TRUE);
} else {
DEBUG_CurrThread->wait_for_first_exception = 1;
}
}
static void DEBUG_DelThread(WINE_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;
DBG_free(t);
}
static BOOL DEBUG_HandleException( EXCEPTION_RECORD *rec, BOOL first_chance, BOOL force )
{
BOOL is_debug = FALSE;
BOOL ret;
if (first_chance && !Options.debug && !force ) return 0; /* pass to app first */
switch (rec->ExceptionCode)
{
case EXCEPTION_BREAKPOINT:
case EXCEPTION_SINGLE_STEP:
is_debug = TRUE;
break;
case CONTROL_C_EXIT:
if (!Options.debug) DEBUG_Exit(0);
break;
}
if (!is_debug)
{
/* print some infos */
fprintf( stderr, "%s: ",
first_chance ? "First chance exception" : "Unhandled exception" );
switch(rec->ExceptionCode)
{
case EXCEPTION_INT_DIVIDE_BY_ZERO:
fprintf( stderr, "divide by zero" );
break;
case EXCEPTION_INT_OVERFLOW:
fprintf( stderr, "overflow" );
break;
case EXCEPTION_ARRAY_BOUNDS_EXCEEDED:
fprintf( stderr, "array bounds " );
break;
case EXCEPTION_ILLEGAL_INSTRUCTION:
fprintf( stderr, "illegal instruction" );
break;
case EXCEPTION_STACK_OVERFLOW:
fprintf( stderr, "stack overflow" );
break;
case EXCEPTION_PRIV_INSTRUCTION:
fprintf( stderr, "priviledged instruction" );
break;
case EXCEPTION_ACCESS_VIOLATION:
if (rec->NumberParameters == 2)
fprintf( stderr, "page fault on %s access to 0x%08lx",
rec->ExceptionInformation[0] ? "write" : "read",
rec->ExceptionInformation[1] );
else
fprintf( stderr, "page fault" );
break;
case EXCEPTION_DATATYPE_MISALIGNMENT:
fprintf( stderr, "Alignment" );
break;
case CONTROL_C_EXIT:
fprintf( stderr, "^C" );
break;
case EXCEPTION_CRITICAL_SECTION_WAIT:
fprintf( stderr, "critical section %08lx wait failed",
rec->ExceptionInformation[0] );
break;
default:
fprintf( stderr, "%08lx", rec->ExceptionCode );
break;
}
}
#if 1
fprintf(stderr, "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);
#endif
ret = DEBUG_Main( is_debug, force );
#if 1
fprintf(stderr, "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);
#endif
return ret;
}
static DWORD CALLBACK DEBUG_MainLoop(LPVOID pid)
{
DEBUG_EVENT de;
char buffer[256];
DWORD cont;
TRACE("WineDbg started on pid %ld\n", (DWORD)pid);
if (!DebugActiveProcess((DWORD)pid))
TRACE("Can't debug process %ld: %ld\n", (DWORD)pid, GetLastError());
while (WaitForDebugEvent(&de, INFINITE)) {
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) break;
TRACE("%08lx:%08lx: exception code=%08lx %d\n",
de.dwProcessId, de.dwThreadId,
de.u.Exception.ExceptionRecord.ExceptionCode,
DEBUG_CurrThread->wait_for_first_exception);
DEBUG_context.ContextFlags = CONTEXT_CONTROL|CONTEXT_INTEGER|CONTEXT_SEGMENTS|CONTEXT_DEBUG_REGISTERS;
if (!GetThreadContext(DEBUG_CurrThread->handle, &DEBUG_context)) {
WARN("Can't get thread's context\n");
break;
}
TRACE("%p:%p\n", de.u.Exception.ExceptionRecord.ExceptionAddress,
(void*)DEBUG_context.Eip);
cont = DEBUG_HandleException(&de.u.Exception.ExceptionRecord,
de.u.Exception.dwFirstChance,
DEBUG_CurrThread->wait_for_first_exception);
if (DEBUG_CurrThread->wait_for_first_exception) {
DEBUG_CurrThread->wait_for_first_exception = 0;
#ifdef __i386__
DEBUG_context.Eip--;
#endif
}
SetThreadContext(DEBUG_CurrThread->handle, &DEBUG_context);
break;
case CREATE_THREAD_DEBUG_EVENT:
TRACE("%08lx:%08lx: create thread D @%p\n", de.dwProcessId, de.dwThreadId,
de.u.CreateThread.lpStartAddress);
if (DEBUG_CurrProcess == NULL) {
ERR("Unknown process\n");
break;
}
if (DEBUG_GetThread(DEBUG_CurrProcess, de.dwThreadId) != NULL) {
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) {
ERR("Couldn't create thread\n");
break;
}
DEBUG_InitCurrThread();
break;
case CREATE_PROCESS_DEBUG_EVENT:
DEBUG_ProcessGetString(buffer, sizeof(buffer),
de.u.CreateProcessInfo.hProcess,
de.u.LoadDll.lpImageName);
/* FIXME unicode ? de.u.CreateProcessInfo.fUnicode */
TRACE("%08lx:%08lx: create process %s @%p\n",
de.dwProcessId, de.dwThreadId,
buffer,
de.u.CreateProcessInfo.lpStartAddress);
if (DEBUG_GetProcess(de.dwProcessId) != NULL) {
TRACE("Skipping already defined process\n");
break;
}
DEBUG_CurrProcess = DEBUG_AddProcess(de.dwProcessId,
de.u.CreateProcessInfo.hProcess);
if (DEBUG_CurrProcess == NULL) {
ERR("Unknown process\n");
break;
}
TRACE("%08lx:%08lx: create thread I @%p\n", de.dwProcessId, de.dwThreadId,
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) {
ERR("Couldn't create thread\n");
break;
}
DEBUG_InitCurrProcess();
DEBUG_InitCurrThread();
break;
case EXIT_THREAD_DEBUG_EVENT:
TRACE("%08lx:%08lx: exit thread (%ld)\n",
de.dwProcessId, de.dwThreadId, de.u.ExitThread.dwExitCode);
if (DEBUG_CurrThread == NULL) {
ERR("Unknown thread\n");
break;
}
/* FIXME: remove break point set on thread startup */
DEBUG_DelThread(DEBUG_CurrThread);
break;
case EXIT_PROCESS_DEBUG_EVENT:
TRACE("%08lx:%08lx: exit process (%ld)\n",
de.dwProcessId, de.dwThreadId, de.u.ExitProcess.dwExitCode);
if (DEBUG_CurrProcess == NULL) {
ERR("Unknown process\n");
break;
}
/* kill last thread */
DEBUG_DelThread(DEBUG_CurrProcess->threads);
/* FIXME: remove break point set on thread startup */
DEBUG_DelProcess(DEBUG_CurrProcess);
break;
case LOAD_DLL_DEBUG_EVENT:
if (DEBUG_CurrThread == NULL) {
ERR("Unknown thread\n");
break;
}
DEBUG_ProcessGetString(buffer, sizeof(buffer),
DEBUG_CurrThread->process->handle,
de.u.LoadDll.lpImageName);
/* FIXME unicode: de.u.LoadDll.fUnicode */
TRACE("%08lx:%08lx: loads DLL %s @%p\n", de.dwProcessId, de.dwThreadId,
buffer, de.u.LoadDll.lpBaseOfDll);
break;
case UNLOAD_DLL_DEBUG_EVENT:
TRACE("%08lx:%08lx: unload DLL @%p\n", de.dwProcessId, de.dwThreadId,
de.u.UnloadDll.lpBaseOfDll);
break;
case OUTPUT_DEBUG_STRING_EVENT:
if (DEBUG_CurrThread == NULL) {
ERR("Unknown thread\n");
break;
}
DEBUG_ProcessGetString(buffer, sizeof(buffer),
DEBUG_CurrThread->process->handle,
de.u.DebugString.lpDebugStringData);
/* fixme unicode de.u.DebugString.fUnicode ? */
TRACE("%08lx:%08lx: output debug string (%s)\n",
de.dwProcessId, de.dwThreadId,
buffer);
break;
case RIP_EVENT:
TRACE("%08lx:%08lx: rip error=%ld type=%ld\n",
de.dwProcessId, de.dwThreadId, de.u.RipInfo.dwError,
de.u.RipInfo.dwType);
break;
default:
TRACE("%08lx:%08lx: unknown event (%ld)\n",
de.dwProcessId, de.dwThreadId, de.dwDebugEventCode);
}
ContinueDebugEvent(de.dwProcessId, de.dwThreadId, cont);
}
TRACE("WineDbg terminated on pid %ld\n", (DWORD)pid);
return 0L;
}
#include "thread.h"
#include "process.h"
void DEBUG_StartDebugger(DWORD pid)
{
if (Options.debug)
CreateThread(NULL, 0, DEBUG_MainLoop, (LPVOID)pid, 0, NULL);
}