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Sweden-Number/programs/winedbg/winedbg.c

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/* Wine internal debugger
* Interface to Windows debugger API
* Copyright 2000-2004 Eric Pouech
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "config.h"
#include "wine/port.h"
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "debugger.h"
#include "winternl.h"
#include "wine/exception.h"
#include "wine/library.h"
#include "wine/debug.h"
/* TODO list:
*
* - minidump
* + set a mode where winedbg would start (postmortem debugging) from a minidump
* - CPU adherence
* + we always assume the stack grows as on i386 (ie downwards)
* - UI
* + enable back the limited output (depth of structure printing and number of
* lines)
* + make the output as close as possible to what gdb does
* - symbol management:
* + symbol table loading is broken
* + in symbol_get_lvalue, we don't do any scoping (as C does) between local and
* global vars (we may need this to force some display for example). A solution
* would be always to return arrays with: local vars, global vars, thunks
* - type management:
* + some bits of internal types are missing (like type casts and the address
* operator)
* + the type for an enum's value is always inferred as int (winedbg & dbghelp)
* + most of the code implies that sizeof(void*) = sizeof(int)
* + all computations should be made on long long
* o expr computations are in int:s
* o bitfield size is on a 4-bytes
* + array_index and deref should be the same function (or should share the same
* core)
* - execution:
* + set a better fix for gdb (proxy mode) than the step-mode hack
* + implement function call in debuggee
* + trampoline management is broken when getting 16 <=> 32 thunk destination
* address
* + thunking of delayed imports doesn't work as expected (ie, when stepping,
* it currently stops at first insn with line number during the library
* loading). We should identify this (__wine_delay_import) and set a
* breakpoint instead of single stepping the library loading.
* + it's wrong to copy thread->step_over_bp into process->bp[0] (when
* we have a multi-thread debuggee). complete fix must include storing all
* thread's step-over bp in process-wide bp array, and not to handle bp
* when we have the wrong thread running into that bp
* + code in CREATE_PROCESS debug event doesn't work on Windows, as we cannot
* get the name of the main module this way. We should rewrite all this code
* and store in struct dbg_process as early as possible (before process
* creation or attachment), the name of the main module
* - global:
* + define a better way to enable the wine extensions (either DBG SDK function
* in dbghelp, or TLS variable, or environment variable or ...)
* + audit all files to ensure that we check all potential return values from
* every function call to catch the errors
* + BTW check also whether the exception mechanism is the best way to return
* errors (or find a proper fix for MinGW port)
* + use Wine standard list mechanism for all list handling
*/
WINE_DEFAULT_DEBUG_CHANNEL(winedbg);
struct dbg_process* dbg_curr_process = NULL;
struct dbg_thread* dbg_curr_thread = NULL;
DWORD dbg_curr_tid;
DWORD dbg_curr_pid;
CONTEXT dbg_context;
BOOL dbg_interactiveP = FALSE;
static struct dbg_process* dbg_process_list = NULL;
struct dbg_internal_var dbg_internal_vars[DBG_IV_LAST];
const struct dbg_internal_var* dbg_context_vars;
static HANDLE dbg_houtput;
void dbg_outputA(const char* buffer, int len)
{
static char line_buff[4096];
static unsigned int line_pos;
DWORD w, i;
while (len > 0)
{
unsigned int count = min( len, sizeof(line_buff) - line_pos );
memcpy( line_buff + line_pos, buffer, count );
buffer += count;
len -= count;
line_pos += count;
for (i = line_pos; i > 0; i--) if (line_buff[i-1] == '\n') break;
if (!i) /* no newline found */
{
if (len > 0) i = line_pos; /* buffer is full, flush anyway */
else break;
}
WriteFile(dbg_houtput, line_buff, i, &w, NULL);
memmove( line_buff, line_buff + i, line_pos - i );
line_pos -= i;
}
}
void dbg_outputW(const WCHAR* buffer, int len)
{
char* ansi = NULL;
int newlen;
/* do a serious Unicode to ANSI conversion
* FIXME: should CP_ACP be GetConsoleCP()?
*/
newlen = WideCharToMultiByte(CP_ACP, 0, buffer, len, NULL, 0, NULL, NULL);
if (newlen)
{
if (!(ansi = HeapAlloc(GetProcessHeap(), 0, newlen))) return;
WideCharToMultiByte(CP_ACP, 0, buffer, len, ansi, newlen, NULL, NULL);
dbg_outputA(ansi, newlen);
HeapFree(GetProcessHeap(), 0, ansi);
}
}
int dbg_printf(const char* format, ...)
{
static char buf[4*1024];
va_list valist;
int len;
va_start(valist, format);
len = vsnprintf(buf, sizeof(buf), format, valist);
va_end(valist);
if (len <= -1 || len >= sizeof(buf))
{
len = sizeof(buf) - 1;
buf[len] = 0;
buf[len - 1] = buf[len - 2] = buf[len - 3] = '.';
}
dbg_outputA(buf, len);
return len;
}
static unsigned dbg_load_internal_vars(void)
{
HKEY hkey;
DWORD type = REG_DWORD;
DWORD val;
DWORD count = sizeof(val);
int i;
struct dbg_internal_var* div = dbg_internal_vars;
/* initializes internal vars table */
#define INTERNAL_VAR(_var,_val,_ref,_tid) \
div->val = _val; div->name = #_var; div->pval = _ref; \
div->typeid = _tid; div++;
#include "intvar.h"
#undef INTERNAL_VAR
/* @@ Wine registry key: HKCU\Software\Wine\WineDbg */
if (RegCreateKeyA(HKEY_CURRENT_USER, "Software\\Wine\\WineDbg", &hkey))
{
WINE_ERR("Cannot create WineDbg key in registry\n");
return FALSE;
}
for (i = 0; i < DBG_IV_LAST; i++)
{
if (!dbg_internal_vars[i].pval)
{
if (!RegQueryValueEx(hkey, dbg_internal_vars[i].name, 0,
&type, (LPBYTE)&val, &count))
dbg_internal_vars[i].val = val;
dbg_internal_vars[i].pval = &dbg_internal_vars[i].val;
}
}
RegCloseKey(hkey);
/* set up the debug variables for the CPU context */
dbg_context_vars = be_cpu->init_registers(&dbg_context);
return TRUE;
}
static unsigned dbg_save_internal_vars(void)
{
HKEY hkey;
int i;
/* @@ Wine registry key: HKCU\Software\Wine\WineDbg */
if (RegCreateKeyA(HKEY_CURRENT_USER, "Software\\Wine\\WineDbg", &hkey))
{
WINE_ERR("Cannot create WineDbg key in registry\n");
return FALSE;
}
for (i = 0; i < DBG_IV_LAST; i++)
{
/* FIXME: type should be infered from basic type -if any- of intvar */
if (dbg_internal_vars[i].pval == &dbg_internal_vars[i].val)
RegSetValueEx(hkey, dbg_internal_vars[i].name, 0,
REG_DWORD, (const void*)dbg_internal_vars[i].pval,
sizeof(*dbg_internal_vars[i].pval));
}
RegCloseKey(hkey);
return TRUE;
}
const struct dbg_internal_var* dbg_get_internal_var(const char* name)
{
const struct dbg_internal_var* div;
for (div = &dbg_internal_vars[DBG_IV_LAST - 1]; div >= dbg_internal_vars; div--)
{
if (!strcmp(div->name, name)) return div;
}
for (div = dbg_context_vars; div->name; div++)
{
if (!strcasecmp(div->name, name)) return div;
}
return NULL;
}
struct dbg_process* dbg_get_process(DWORD pid)
{
struct dbg_process* p;
for (p = dbg_process_list; p; p = p->next)
if (p->pid == pid) break;
return p;
}
struct dbg_process* dbg_add_process(DWORD pid, HANDLE h)
{
/* FIXME: temporary */
extern struct be_process_io be_process_active_io;
struct dbg_process* p;
if ((p = dbg_get_process(pid)))
{
if (p->handle != 0)
{
WINE_ERR("Process (%lu) is already defined\n", pid);
}
else
{
p->handle = h;
p->imageName = NULL;
}
return p;
}
if (!(p = HeapAlloc(GetProcessHeap(), 0, sizeof(struct dbg_process)))) return NULL;
p->handle = h;
p->pid = pid;
p->process_io = &be_process_active_io;
p->imageName = NULL;
p->threads = NULL;
p->continue_on_first_exception = FALSE;
p->next_bp = 1; /* breakpoint 0 is reserved for step-over */
memset(p->bp, 0, sizeof(p->bp));
p->delayed_bp = NULL;
p->num_delayed_bp = 0;
p->next = dbg_process_list;
p->prev = NULL;
if (dbg_process_list) dbg_process_list->prev = p;
dbg_process_list = p;
return p;
}
void dbg_set_process_name(struct dbg_process* p, const char* imageName)
{
assert(p->imageName == NULL);
if (imageName)
{
char* tmp = HeapAlloc(GetProcessHeap(), 0, strlen(imageName) + 1);
if (tmp) p->imageName = strcpy(tmp, imageName);
}
}
void dbg_del_process(struct dbg_process* p)
{
int i;
while (p->threads) dbg_del_thread(p->threads);
for (i = 0; i < p->num_delayed_bp; i++)
if (p->delayed_bp[i].is_symbol)
HeapFree(GetProcessHeap(), 0, p->delayed_bp[i].u.symbol.name);
HeapFree(GetProcessHeap(), 0, p->delayed_bp);
if (p->prev) p->prev->next = p->next;
if (p->next) p->next->prev = p->prev;
if (p == dbg_process_list) dbg_process_list = p->next;
if (p == dbg_curr_process) dbg_curr_process = NULL;
HeapFree(GetProcessHeap(), 0, (char*)p->imageName);
HeapFree(GetProcessHeap(), 0, p);
}
struct mod_loader_info
{
HANDLE handle;
IMAGEHLP_MODULE* imh_mod;
};
static BOOL CALLBACK mod_loader_cb(PSTR mod_name, DWORD base, void* ctx)
{
struct mod_loader_info* mli = (struct mod_loader_info*)ctx;
if (!strcmp(mod_name, "<wine-loader>"))
{
if (SymGetModuleInfo(mli->handle, base, mli->imh_mod))
return FALSE; /* stop enum */
}
return TRUE;
}
BOOL dbg_get_debuggee_info(HANDLE hProcess, IMAGEHLP_MODULE* imh_mod)
{
struct mod_loader_info mli;
DWORD opt;
/* this will resynchronize builtin dbghelp's internal ELF module list */
SymLoadModule(hProcess, 0, 0, 0, 0, 0);
mli.handle = hProcess;
mli.imh_mod = imh_mod;
imh_mod->SizeOfStruct = sizeof(*imh_mod);
imh_mod->BaseOfImage = 0;
/* this is a wine specific options to return also ELF modules in the
* enumeration
*/
SymSetOptions((opt = SymGetOptions()) | 0x40000000);
SymEnumerateModules(hProcess, mod_loader_cb, (void*)&mli);
SymSetOptions(opt);
return imh_mod->BaseOfImage != 0;
}
struct dbg_thread* dbg_get_thread(struct dbg_process* p, DWORD tid)
{
struct dbg_thread* t;
if (!p) return NULL;
for (t = p->threads; t; t = t->next)
if (t->tid == tid) break;
return t;
}
struct dbg_thread* dbg_add_thread(struct dbg_process* p, DWORD tid,
HANDLE h, void* teb)
{
struct dbg_thread* t = HeapAlloc(GetProcessHeap(), 0, sizeof(struct dbg_thread));
if (!t)
return NULL;
t->handle = h;
t->tid = tid;
t->teb = teb;
t->process = p;
t->exec_mode = dbg_exec_cont;
t->exec_count = 0;
t->step_over_bp.enabled = FALSE;
t->step_over_bp.refcount = 0;
t->stopped_xpoint = -1;
t->in_exception = FALSE;
t->frames = NULL;
t->num_frames = 0;
t->curr_frame = -1;
t->addr_mode = AddrModeFlat;
snprintf(t->name, sizeof(t->name), "0x%08lx", tid);
t->next = p->threads;
t->prev = NULL;
if (p->threads) p->threads->prev = t;
p->threads = t;
return t;
}
void dbg_del_thread(struct dbg_thread* t)
{
HeapFree(GetProcessHeap(), 0, t->frames);
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;
if (t == dbg_curr_thread) dbg_curr_thread = NULL;
HeapFree(GetProcessHeap(), 0, t);
}
BOOL dbg_interrupt_debuggee(void)
{
if (!dbg_process_list) return FALSE;
/* FIXME: since we likely have a single process, signal the first process
* in list
*/
if (dbg_process_list->next) dbg_printf("Ctrl-C: only stopping the first process\n");
else dbg_printf("Ctrl-C: stopping debuggee\n");
dbg_process_list->continue_on_first_exception = FALSE;
return DebugBreakProcess(dbg_process_list->handle);
}
static BOOL WINAPI ctrl_c_handler(DWORD dwCtrlType)
{
if (dwCtrlType == CTRL_C_EVENT)
{
return dbg_interrupt_debuggee();
}
return FALSE;
}
static void dbg_init_console(void)
{
/* set our control-C handler */
SetConsoleCtrlHandler(ctrl_c_handler, TRUE);
/* set our own title */
SetConsoleTitle("Wine Debugger");
}
static int dbg_winedbg_usage(void)
{
dbg_printf("Usage: winedbg [--command cmd|--file file|--auto] [--gdb [--no-start] [--with-xterm]] cmdline\n");
return -1;
}
struct backend_cpu* be_cpu;
#ifdef __i386__
extern struct backend_cpu be_i386;
#elif __powerpc__
extern struct backend_cpu be_ppc;
#elif __ALPHA__
extern struct backend_cpu be_alpha;
#else
# error CPU unknown
#endif
int main(int argc, char** argv)
{
int retv = 0;
HANDLE hFile = INVALID_HANDLE_VALUE;
enum dbg_start ds;
#ifdef __i386__
be_cpu = &be_i386;
#elif __powerpc__
be_cpu = &be_ppc;
#elif __ALPHA__
be_cpu = &be_alpha;
#else
# error CPU unknown
#endif
/* Initialize the output */
dbg_houtput = GetStdHandle(STD_OUTPUT_HANDLE);
/* Initialize internal vars */
if (!dbg_load_internal_vars()) return -1;
/* as we don't care about exec name */
argc--; argv++;
if (argc && !strcmp(argv[0], "--gdb"))
{
retv = gdb_main(argc, argv);
if (retv == -1) dbg_winedbg_usage();
return retv;
}
dbg_init_console();
SymSetOptions((SymGetOptions() & ~(SYMOPT_UNDNAME)) |
SYMOPT_LOAD_LINES | SYMOPT_DEFERRED_LOADS | SYMOPT_AUTO_PUBLICS);
if (argc && (!strcmp(argv[0], "--auto") || !strcmp(argv[0], "--minidump")))
{
/* force some internal variables */
DBG_IVAR(BreakOnDllLoad) = 0;
dbg_houtput = GetStdHandle(STD_ERROR_HANDLE);
switch (dbg_active_auto(argc, argv))
{
case start_ok: return 0;
case start_error_parse: return dbg_winedbg_usage();
case start_error_init: return -1;
}
}
/* parse options */
while (argc > 0 && argv[0][0] == '-')
{
if (!strcmp(argv[0], "--command"))
{
argc--; argv++;
hFile = parser_generate_command_file(argv[0], NULL);
if (hFile == INVALID_HANDLE_VALUE)
{
dbg_printf("Couldn't open temp file (%lu)\n", GetLastError());
return 1;
}
argc--; argv++;
continue;
}
if (!strcmp(argv[0], "--file"))
{
argc--; argv++;
hFile = CreateFileA(argv[0], GENERIC_READ|DELETE, 0,
NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0);
if (hFile == INVALID_HANDLE_VALUE)
{
dbg_printf("Couldn't open file %s (%lu)\n", argv[0], GetLastError());
return 1;
}
argc--; argv++;
continue;
}
if (!strcmp(argv[0], "--"))
{
argc--; argv++;
break;
}
return dbg_winedbg_usage();
}
if (!argc) ds = start_ok;
else if ((ds = dbg_active_attach(argc, argv)) == start_error_parse)
ds = dbg_active_launch(argc, argv);
switch (ds)
{
case start_ok: break;
case start_error_parse: return dbg_winedbg_usage();
case start_error_init: return -1;
}
retv = dbg_main_loop(hFile);
while (dbg_process_list)
dbg_process_list->process_io->close_process(dbg_process_list, TRUE);
dbg_save_internal_vars();
return retv;
}
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