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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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "debugger.h"
#include "winternl.h"
#include "wine/debug.h"
/* TODO list:
*
* - minidump
* + ensure that all commands work as expected in minidump reload function
* (and re-enable parser usage)
* - CPU adherence
* + we always assume the stack grows as on i386 (i.e. downwards)
* - UI
* + re-enable 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)
* + all computations should be made on 64bit
* o bitfield spreading on more bytes than dbg_lgint_t isn't supported
* (can happen on 128bit integers, of an ELF build...)
* - 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)
*/
WINE_DEFAULT_DEBUG_CHANNEL(winedbg);
struct dbg_process* dbg_curr_process = NULL;
struct dbg_thread* dbg_curr_thread = NULL;
DWORD dbg_curr_tid = 0;
DWORD dbg_curr_pid = 0;
dbg_ctx_t dbg_context;
BOOL dbg_interactiveP = FALSE;
HANDLE dbg_houtput = 0;
static struct list dbg_process_list = LIST_INIT(dbg_process_list);
struct dbg_internal_var dbg_internal_vars[DBG_IV_LAST];
static 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;
}
}
int WINAPIV 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 (!RegQueryValueExA(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);
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 inferred from basic type -if any- of intvar */
if (dbg_internal_vars[i].pval == &dbg_internal_vars[i].val)
{
DWORD val = dbg_internal_vars[i].val;
RegSetValueExA(hkey, dbg_internal_vars[i].name, 0, REG_DWORD, (BYTE *)&val, sizeof(val));
}
}
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_curr_process->be_cpu->context_vars; div->name; div++)
{
if (!strcasecmp(div->name, name))
{
struct dbg_internal_var* ret = (void*)lexeme_alloc_size(sizeof(*ret));
/* relocate register's field against current context */
*ret = *div;
ret->pval = (char*)&dbg_context + (DWORD_PTR)div->pval;
return ret;
}
}
return NULL;
}
unsigned dbg_num_processes(void)
{
return list_count(&dbg_process_list);
}
struct dbg_process* dbg_get_process(DWORD pid)
{
struct dbg_process* p;
LIST_FOR_EACH_ENTRY(p, &dbg_process_list, struct dbg_process, entry)
if (p->pid == pid) return p;
return NULL;
}
struct dbg_process* dbg_get_process_h(HANDLE h)
{
struct dbg_process* p;
LIST_FOR_EACH_ENTRY(p, &dbg_process_list, struct dbg_process, entry)
if (p->handle == h) return p;
return NULL;
}
#ifdef __i386__
extern struct backend_cpu be_i386;
#elif defined(__x86_64__)
extern struct backend_cpu be_i386;
extern struct backend_cpu be_x86_64;
#elif defined(__arm__) && !defined(__ARMEB__)
extern struct backend_cpu be_arm;
#elif defined(__aarch64__) && !defined(__AARCH64EB__)
extern struct backend_cpu be_arm64;
#else
# error CPU unknown
#endif
struct dbg_process* dbg_add_process(const struct be_process_io* pio, DWORD pid, HANDLE h)
{
struct dbg_process* p;
BOOL wow64;
if ((p = dbg_get_process(pid)))
return p;
if (!h)
h = OpenProcess(PROCESS_ALL_ACCESS, FALSE, pid);
if (!(p = HeapAlloc(GetProcessHeap(), 0, sizeof(struct dbg_process)))) return NULL;
p->handle = h;
p->pid = pid;
p->process_io = pio;
p->pio_data = NULL;
p->imageName = NULL;
list_init(&p->threads);
p->event_on_first_exception = NULL;
p->active_debuggee = 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->source_ofiles = NULL;
p->search_path = NULL;
p->source_current_file[0] = '\0';
p->source_start_line = -1;
p->source_end_line = -1;
list_add_head(&dbg_process_list, &p->entry);
IsWow64Process(h, &wow64);
#ifdef __i386__
p->be_cpu = &be_i386;
#elif defined(__x86_64__)
p->be_cpu = wow64 ? &be_i386 : &be_x86_64;
#elif defined(__arm__) && !defined(__ARMEB__)
p->be_cpu = &be_arm;
#elif defined(__aarch64__) && !defined(__AARCH64EB__)
p->be_cpu = &be_arm64;
#else
# error CPU unknown
#endif
return p;
}
void dbg_set_process_name(struct dbg_process* p, const WCHAR* imageName)
{
assert(p->imageName == NULL);
if (imageName)
{
WCHAR* tmp = HeapAlloc(GetProcessHeap(), 0, (lstrlenW(imageName) + 1) * sizeof(WCHAR));
if (tmp) p->imageName = lstrcpyW(tmp, imageName);
}
}
void dbg_del_process(struct dbg_process* p)
{
struct dbg_thread* t;
struct dbg_thread* t2;
int i;
LIST_FOR_EACH_ENTRY_SAFE(t, t2, &p->threads, struct dbg_thread, entry)
dbg_del_thread(t);
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);
source_nuke_path(p);
source_free_files(p);
list_remove(&p->entry);
if (p == dbg_curr_process) dbg_curr_process = NULL;
if (p->event_on_first_exception) CloseHandle(p->event_on_first_exception);
HeapFree(GetProcessHeap(), 0, (char*)p->imageName);
HeapFree(GetProcessHeap(), 0, p);
}
/******************************************************************
* dbg_init
*
* Initializes the dbghelp library, and also sets the application directory
* as a place holder for symbol searches.
*/
BOOL dbg_init(HANDLE hProc, const WCHAR* in, BOOL invade)
{
BOOL ret;
ret = SymInitialize(hProc, NULL, invade);
if (ret && in)
{
const WCHAR* last;
for (last = in + lstrlenW(in) - 1; last >= in; last--)
{
if (*last == '/' || *last == '\\')
{
WCHAR* tmp;
tmp = HeapAlloc(GetProcessHeap(), 0, (1024 + 1 + (last - in) + 1) * sizeof(WCHAR));
if (tmp && SymGetSearchPathW(hProc, tmp, 1024))
{
WCHAR* x = tmp + lstrlenW(tmp);
*x++ = ';';
memcpy(x, in, (last - in) * sizeof(WCHAR));
x[last - in] = '\0';
ret = SymSetSearchPathW(hProc, tmp);
}
else ret = FALSE;
HeapFree(GetProcessHeap(), 0, tmp);
break;
}
}
}
return ret;
}
BOOL dbg_load_module(HANDLE hProc, HANDLE hFile, const WCHAR* name, DWORD_PTR base, DWORD size)
{
BOOL ret = SymLoadModuleExW(hProc, NULL, name, NULL, base, size, NULL, 0);
if (ret)
{
IMAGEHLP_MODULEW64 ihm;
ihm.SizeOfStruct = sizeof(ihm);
if (SymGetModuleInfoW64(hProc, base, &ihm) && (ihm.PdbUnmatched || ihm.DbgUnmatched))
dbg_printf("Loaded unmatched debug information for %s\n", wine_dbgstr_w(name));
}
return ret;
}
struct dbg_thread* dbg_get_thread(struct dbg_process* p, DWORD tid)
{
struct dbg_thread* t;
if (!p) return NULL;
LIST_FOR_EACH_ENTRY(t, &p->threads, struct dbg_thread, entry)
if (t->tid == tid) return t;
return NULL;
}
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->name[0] = '\0';
t->in_exception = FALSE;
t->frames = NULL;
t->num_frames = 0;
t->curr_frame = -1;
t->addr_mode = AddrModeFlat;
t->suspended = FALSE;
list_add_head(&p->threads, &t->entry);
return t;
}
void dbg_del_thread(struct dbg_thread* t)
{
HeapFree(GetProcessHeap(), 0, t->frames);
list_remove(&t->entry);
if (t == dbg_curr_thread) dbg_curr_thread = NULL;
HeapFree(GetProcessHeap(), 0, t);
}
void dbg_set_option(const char* option, const char* val)
{
if (!strcasecmp(option, "module_load_mismatched"))
{
DWORD opt = SymGetOptions();
if (!val)
dbg_printf("Option: module_load_mismatched %s\n", opt & SYMOPT_LOAD_ANYTHING ? "true" : "false");
else if (!strcasecmp(val, "true")) opt |= SYMOPT_LOAD_ANYTHING;
else if (!strcasecmp(val, "false")) opt &= ~SYMOPT_LOAD_ANYTHING;
else
{
dbg_printf("Syntax: module_load_mismatched [true|false]\n");
return;
}
SymSetOptions(opt);
}
else if (!strcasecmp(option, "symbol_picker"))
{
if (!val)
dbg_printf("Option: symbol_picker %s\n",
symbol_current_picker == symbol_picker_interactive ? "interactive" : "scoped");
else if (!strcasecmp(val, "interactive"))
symbol_current_picker = symbol_picker_interactive;
else if (!strcasecmp(val, "scoped"))
symbol_current_picker = symbol_picker_scoped;
else
{
dbg_printf("Syntax: symbol_picker [interactive|scoped]\n");
return;
}
}
else dbg_printf("Unknown option '%s'\n", option);
}
BOOL dbg_interrupt_debuggee(void)
{
struct dbg_process* p;
if (list_empty(&dbg_process_list)) return FALSE;
/* FIXME: since we likely have a single process, signal the first process
* in list
*/
p = LIST_ENTRY(list_head(&dbg_process_list), struct dbg_process, entry);
if (list_next(&dbg_process_list, &p->entry)) dbg_printf("Ctrl-C: only stopping the first process\n");
else dbg_printf("Ctrl-C: stopping debuggee\n");
if (p->event_on_first_exception)
{
SetEvent(p->event_on_first_exception);
CloseHandle(p->event_on_first_exception);
p->event_on_first_exception = NULL;
}
return DebugBreakProcess(p->handle);
}
static BOOL WINAPI ctrl_c_handler(DWORD dwCtrlType)
{
if (dwCtrlType == CTRL_C_EVENT)
{
return dbg_interrupt_debuggee();
}
return FALSE;
}
void dbg_init_console(void)
{
/* set the output handle */
dbg_houtput = GetStdHandle(STD_OUTPUT_HANDLE);
/* set our control-C handler */
SetConsoleCtrlHandler(ctrl_c_handler, TRUE);
/* set our own title */
SetConsoleTitleA("Wine Debugger");
}
static int dbg_winedbg_usage(BOOL advanced)
{
if (advanced)
{
dbg_printf("Usage:\n"
" winedbg <cmdline> launch process <cmdline> (as if you were starting\n"
" it with wine) and run WineDbg on it\n"
" winedbg <num> attach to running process of wpid <num> and run\n"
" WineDbg on it\n"
" winedbg --gdb <cmdline> launch process <cmdline> (as if you were starting\n"
" wine) and run gdb (proxied) on it\n"
" winedbg --gdb <num> attach to running process of wpid <num> and run\n"
" gdb (proxied) on it\n"
" winedbg <file.mdmp> reload the minidump <file.mdmp> into memory and run\n"
" WineDbg on it\n"
" winedbg --help prints advanced options\n");
}
else
dbg_printf("Usage:\n\twinedbg [ [ --gdb ] [ <prog-name> [ <prog-args> ] | <num> | <file.mdmp> | --help ]\n");
return 0;
}
void dbg_start_interactive(const char* filename, HANDLE hFile)
{
struct dbg_process* p;
struct dbg_process* p2;
if (dbg_curr_process)
{
dbg_printf("WineDbg starting on pid %04lx\n", dbg_curr_pid);
if (dbg_curr_process->active_debuggee) dbg_active_wait_for_first_exception();
}
dbg_interactiveP = TRUE;
parser_handle(filename, hFile);
LIST_FOR_EACH_ENTRY_SAFE(p, p2, &dbg_process_list, struct dbg_process, entry)
p->process_io->close_process(p, FALSE);
dbg_save_internal_vars();
}
static LONG CALLBACK top_filter( EXCEPTION_POINTERS *ptr )
{
dbg_printf( "winedbg: Internal crash at %p\n", ptr->ExceptionRecord->ExceptionAddress );
return EXCEPTION_EXECUTE_HANDLER;
}
static void restart_if_wow64(void)
{
BOOL is_wow64;
if (IsWow64Process( GetCurrentProcess(), &is_wow64 ) && is_wow64)
{
STARTUPINFOW si;
PROCESS_INFORMATION pi;
WCHAR filename[MAX_PATH];
void *redir;
DWORD exit_code;
memset( &si, 0, sizeof(si) );
si.cb = sizeof(si);
GetSystemDirectoryW( filename, MAX_PATH );
lstrcatW( filename, L"\\winedbg.exe" );
Wow64DisableWow64FsRedirection( &redir );
if (CreateProcessW( filename, GetCommandLineW(), NULL, NULL, FALSE, 0, NULL, NULL, &si, &pi ))
{
WINE_TRACE( "restarting %s\n", wine_dbgstr_w(filename) );
SetConsoleCtrlHandler( NULL, TRUE ); /* Ignore ^C */
WaitForSingleObject( pi.hProcess, INFINITE );
GetExitCodeProcess( pi.hProcess, &exit_code );
ExitProcess( exit_code );
}
else WINE_ERR( "failed to restart 64-bit %s, err %ld\n", wine_dbgstr_w(filename), GetLastError() );
Wow64RevertWow64FsRedirection( redir );
}
}
int main(int argc, char** argv)
{
int retv = 0;
HANDLE hFile = INVALID_HANDLE_VALUE;
enum dbg_start ds;
const char* filename = NULL;
/* Initialize the output */
dbg_houtput = GetStdHandle(STD_OUTPUT_HANDLE);
SetUnhandledExceptionFilter( top_filter );
/* 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], "--help"))
return dbg_winedbg_usage(TRUE);
if (argc && !strcmp(argv[0], "--gdb"))
{
restart_if_wow64();
retv = gdb_main(argc, argv);
if (retv == -1) dbg_winedbg_usage(FALSE);
return retv;
}
dbg_init_console();
SymSetOptions((SymGetOptions() & ~(SYMOPT_UNDNAME)) |
SYMOPT_LOAD_LINES | SYMOPT_DEFERRED_LOADS | SYMOPT_AUTO_PUBLICS |
SYMOPT_INCLUDE_32BIT_MODULES);
if (argc && !strcmp(argv[0], "--auto"))
{
switch (dbg_active_auto(argc, argv))
{
case start_ok: return 0;
case start_error_parse: return dbg_winedbg_usage(FALSE);
case start_error_init: return -1;
}
}
if (argc && !strcmp(argv[0], "--minidump"))
{
switch (dbg_active_minidump(argc, argv))
{
case start_ok: return 0;
case start_error_parse: return dbg_winedbg_usage(FALSE);
case start_error_init: return -1;
}
}
/* parse options */
while (argc > 0 && argv[0][0] == '-')
{
if (!strcmp(argv[0], "--command") && argc > 1)
{
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 > 1)
{
argc--; argv++;
filename = argv[0];
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(FALSE);
}
if (!argc) ds = start_ok;
else if ((ds = dbg_active_attach(argc, argv)) == start_error_parse &&
(ds = minidump_reload(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(FALSE);
case start_error_init: return -1;
}
restart_if_wow64();
dbg_start_interactive(filename, hFile);
return 0;
}
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