mono/mini/mini-windows.c

   1 /**
   2  * \file
   3  * POSIX signal handling support for Mono.
   4  *
   5  * Authors:
   6  *   Mono Team (mono-list@lists.ximian.com)
   7  *
   8  * Copyright 2001-2003 Ximian, Inc.
   9  * Copyright 2003-2008 Ximian, Inc.
  10  *
  11  * See LICENSE for licensing information.
  12  * Licensed under the MIT license. See LICENSE file in the project root for full license information.
  13  */
  14 #include <config.h>
  15 #include <signal.h>
  16 #include <math.h>
  17 #include <conio.h>
  18 #include <assert.h>
  19
  20 #include <mono/metadata/assembly.h>
  21 #include <mono/metadata/loader.h>
  22 #include <mono/metadata/tabledefs.h>
  23 #include <mono/metadata/class.h>
  24 #include <mono/metadata/object.h>
  25 #include <mono/metadata/tokentype.h>
  26 #include <mono/metadata/tabledefs.h>
  27 #include <mono/metadata/threads.h>
  28 #include <mono/metadata/appdomain.h>
  29 #include <mono/metadata/debug-helpers.h>
  30 #include "mono/metadata/profiler.h"
  31 #include <mono/metadata/profiler-private.h>
  32 #include <mono/metadata/mono-config.h>
  33 #include <mono/metadata/environment.h>
  34 #include <mono/metadata/mono-debug.h>
  35 #include <mono/metadata/gc-internals.h>
  36 #include <mono/metadata/threads-types.h>
  37 #include <mono/metadata/verify.h>
  38 #include <mono/metadata/verify-internals.h>
  39 #include <mono/metadata/mempool-internals.h>
  40 #include <mono/metadata/attach.h>
  41 #include <mono/utils/mono-math.h>
  42 #include <mono/utils/mono-compiler.h>
  43 #include <mono/utils/mono-counters.h>
  44 #include <mono/utils/mono-logger-internals.h>
  45 #include <mono/utils/mono-mmap.h>
  46 #include <mono/utils/dtrace.h>
  47
  48 #include "mini.h"
  49 #include "mini-windows.h"
  50 #include <string.h>
  51 #include <ctype.h>
  52 #include "trace.h"
  53 #include "version.h"
  54
  55 #include "jit-icalls.h"
  56
  57 #if G_HAVE_API_SUPPORT(HAVE_CLASSIC_WINAPI_SUPPORT)
  58 #include <mmsystem.h>
  59 #endif
  60
  61 #define MONO_HANDLER_DELIMITER ','
  62 #define MONO_HANDLER_DELIMITER_LEN G_N_ELEMENTS(MONO_HANDLER_DELIMITER)-1
  63
  64 #define MONO_HANDLER_ATEXIT_WAIT_KEYPRESS "atexit-waitkeypress"
  65 #define MONO_HANDLER_ATEXIT_WAIT_KEYPRESS_LEN G_N_ELEMENTS(MONO_HANDLER_ATEXIT_WAIT_KEYPRESS)-1
  66
  67 // Typedefs used to setup handler table.
  68 typedef void (*handler)(void);
  69
  70 typedef struct {
  71         const char * cmd;
  72         const int cmd_len;
  73         handler handler;
  74 } HandlerItem;
  75
  76 #if G_HAVE_API_SUPPORT(HAVE_CLASSIC_WINAPI_SUPPORT)
  77 /**
  78 * atexit_wait_keypress:
  79 *
  80 * This function is installed as an atexit function making sure that the console is not terminated before the end user has a chance to read the result.
  81 * This can be handy in debug scenarios (running from within the debugger) since an exit of the process will close the console window
  82 * without giving the end user a chance to look at the output before closed.
  83 */
  84 static void
  85 atexit_wait_keypress (void)
  86 {
  87
  88         fflush (stdin);
  89
  90         printf ("Press any key to continue . . . ");
  91         fflush (stdout);
  92
  93         _getch ();
  94
  95         return;
  96 }
  97
  98 /**
  99 * install_atexit_wait_keypress:
 100 *
 101 * This function installs the wait keypress exit handler.
 102 */
 103 static void
 104 install_atexit_wait_keypress (void)
 105 {
 106         atexit (atexit_wait_keypress);
 107         return;
 108 }
 109
 110 #else
 111
 112 /**
 113 * install_atexit_wait_keypress:
 114 *
 115 * Not supported on WINAPI family.
 116 */
 117 static void
 118 install_atexit_wait_keypress (void)
 119 {
 120         return;
 121 }
 122
 123 #endif /* G_HAVE_API_SUPPORT(HAVE_CLASSIC_WINAPI_SUPPORT) */
 124
 125 // Table describing handlers that can be installed at process startup. Adding a new handler can be done by adding a new item to the table together with an install handler function.
 126 const HandlerItem g_handler_items[] = { { MONO_HANDLER_ATEXIT_WAIT_KEYPRESS, MONO_HANDLER_ATEXIT_WAIT_KEYPRESS_LEN, install_atexit_wait_keypress },
 127                                         { NULL, 0, NULL } };
 128
 129 /**
 130  * get_handler_arg_len:
 131  * @handlers: Get length of next handler.
 132  *
 133  * This function calculates the length of next handler included in argument.
 134  *
 135  * Returns: The length of next handler, if available.
 136  */
 137 static size_t
 138 get_next_handler_arg_len (const char *handlers)
 139 {
 140         assert (handlers != NULL);
 141
 142         size_t current_len = 0;
 143         const char *handler = strchr (handlers, MONO_HANDLER_DELIMITER);
 144         if (handler != NULL) {
 145                 // Get length of next handler arg.
 146                 current_len = (handler - handlers);
 147         } else {
 148                 // Consume rest as length of next handler arg.
 149                 current_len = strlen (handlers);
 150         }
 151
 152         return current_len;
 153 }
 154
 155 /**
 156  * install_custom_handler:
 157  * @handlers: Handlers included in --handler argument, example "atexit-waitkeypress,someothercmd,yetanothercmd".
 158  * @handler_arg_len: Output, length of consumed handler.
 159  *
 160  * This function installs the next handler included in @handlers parameter.
 161  *
 162  * Returns: TRUE on successful install, FALSE on failure or unrecognized handler.
 163  */
 164 static gboolean
 165 install_custom_handler (const char *handlers, size_t *handler_arg_len)
 166 {
 167         gboolean result = FALSE;
 168
 169         assert (handlers != NULL);
 170         assert (handler_arg_len);
 171
 172         *handler_arg_len = get_next_handler_arg_len (handlers);
 173         for (int current_item = 0; current_item < G_N_ELEMENTS (g_handler_items); ++current_item) {
 174                 const HandlerItem * handler_item = &g_handler_items [current_item];
 175
 176                 if (handler_item->cmd == NULL)
 177                         continue;
 178
 179                 if (*handler_arg_len == handler_item->cmd_len && strncmp (handlers, handler_item->cmd, *handler_arg_len) == 0) {
 180                         assert (handler_item->handler != NULL);
 181                         handler_item->handler ();
 182                         result = TRUE;
 183                         break;
 184                 }
 185         }
 186         return result;
 187 }
 188
 189 void
 190 mono_runtime_install_handlers (void)
 191 {
 192 #ifndef MONO_CROSS_COMPILE
 193         win32_seh_init();
 194         win32_seh_set_handler(SIGFPE, mono_sigfpe_signal_handler);
 195         win32_seh_set_handler(SIGILL, mono_sigill_signal_handler);
 196         win32_seh_set_handler(SIGSEGV, mono_sigsegv_signal_handler);
 197         if (mini_get_debug_options ()->handle_sigint)
 198                 win32_seh_set_handler(SIGINT, mono_sigint_signal_handler);
 199 #endif
 200 }
 201
 202 gboolean
 203 mono_runtime_install_custom_handlers (const char *handlers)
 204 {
 205         gboolean result = FALSE;
 206
 207         assert (handlers != NULL);
 208         while (*handlers != '\0') {
 209                 size_t handler_arg_len = 0;
 210
 211                 result = install_custom_handler (handlers, &handler_arg_len);
 212                 handlers += handler_arg_len;
 213
 214                 if (*handlers == MONO_HANDLER_DELIMITER)
 215                         handlers++;
 216                 if (!result)
 217                         break;
 218         }
 219
 220         return result;
 221 }
 222
 223 void
 224 mono_runtime_install_custom_handlers_usage (void)
 225 {
 226         fprintf (stdout,
 227                  "Custom Handlers:\n"
 228                  "   --handlers=HANDLERS            Enable handler support, HANDLERS is a comma\n"
 229                  "                                  separated list of available handlers to install.\n"
 230                  "\n"
 231 #if G_HAVE_API_SUPPORT(HAVE_CLASSIC_WINAPI_SUPPORT)
 232                  "HANDLERS is composed of:\n"
 233                  "    atexit-waitkeypress           Install an atexit handler waiting for a keypress\n"
 234                  "                                  before exiting process.\n");
 235 #else
 236                  "No handlers supported on current platform.\n");
 237 #endif /* G_HAVE_API_SUPPORT(HAVE_CLASSIC_WINAPI_SUPPORT) */
 238 }
 239
 240 void
 241 mono_runtime_cleanup_handlers (void)
 242 {
 243 #ifndef MONO_CROSS_COMPILE
 244         win32_seh_cleanup();
 245 #endif
 246 }
 247
 248
 249 /* mono_chain_signal:
 250  *
 251  *   Call the original signal handler for the signal given by the arguments, which
 252  * should be the same as for a signal handler. Returns TRUE if the original handler
 253  * was called, false otherwise.
 254  */
 255 gboolean
 256 MONO_SIG_HANDLER_SIGNATURE (mono_chain_signal)
 257 {
 258         MonoJitTlsData *jit_tls = mono_tls_get_jit_tls ();
 259         jit_tls->mono_win_chained_exception_needs_run = TRUE;
 260         return TRUE;
 261 }
 262
 263 #if G_HAVE_API_SUPPORT(HAVE_CLASSIC_WINAPI_SUPPORT)
 264 static MMRESULT g_timer_event = 0;
 265 static HANDLE g_timer_main_thread = INVALID_HANDLE_VALUE;
 266
 267 static VOID
 268 thread_timer_expired (HANDLE thread)
 269 {
 270         CONTEXT context;
 271
 272         context.ContextFlags = CONTEXT_CONTROL;
 273         if (GetThreadContext (thread, &context)) {
 274 #ifdef _WIN64
 275                 mono_profiler_stat_hit ((guchar *) context.Rip, &context);
 276 #else
 277                 mono_profiler_stat_hit ((guchar *) context.Eip, &context);
 278 #endif
 279         }
 280 }
 281
 282 static VOID CALLBACK
 283 timer_event_proc (UINT uID, UINT uMsg, DWORD_PTR dwUser, DWORD_PTR dw1, DWORD_PTR dw2)
 284 {
 285         thread_timer_expired ((HANDLE)dwUser);
 286 }
 287
 288 static VOID
 289 stop_profiler_timer_event (void)
 290 {
 291         if (g_timer_event != 0) {
 292
 293                 timeKillEvent (g_timer_event);
 294                 g_timer_event = 0;
 295         }
 296
 297         if (g_timer_main_thread != INVALID_HANDLE_VALUE) {
 298
 299                 CloseHandle (g_timer_main_thread);
 300                 g_timer_main_thread = INVALID_HANDLE_VALUE;
 301         }
 302 }
 303
 304 static VOID
 305 start_profiler_timer_event (void)
 306 {
 307         g_return_if_fail (g_timer_main_thread == INVALID_HANDLE_VALUE && g_timer_event == 0);
 308
 309         TIMECAPS timecaps;
 310
 311         if (timeGetDevCaps (&timecaps, sizeof (timecaps)) != TIMERR_NOERROR)
 312                 return;
 313
 314         g_timer_main_thread = OpenThread (READ_CONTROL | THREAD_GET_CONTEXT, FALSE, GetCurrentThreadId ());
 315         if (g_timer_main_thread == NULL)
 316                 return;
 317
 318         if (timeBeginPeriod (1) != TIMERR_NOERROR)
 319                 return;
 320
 321         g_timer_event = timeSetEvent (1, 0, (LPTIMECALLBACK)timer_event_proc, (DWORD_PTR)g_timer_main_thread, TIME_PERIODIC | TIME_KILL_SYNCHRONOUS);
 322         if (g_timer_event == 0) {
 323                 timeEndPeriod (1);
 324                 return;
 325         }
 326 }
 327
 328 void
 329 mono_runtime_setup_stat_profiler (void)
 330 {
 331         start_profiler_timer_event ();
 332         return;
 333 }
 334
 335 void
 336 mono_runtime_shutdown_stat_profiler (void)
 337 {
 338         stop_profiler_timer_event ();
 339         return;
 340 }
 341
 342 gboolean
 343 mono_setup_thread_context(DWORD thread_id, MonoContext *mono_context)
 344 {
 345         HANDLE handle;
 346         CONTEXT context;
 347
 348         g_assert (thread_id != GetCurrentThreadId ());
 349
 350         handle = OpenThread (THREAD_ALL_ACCESS, FALSE, thread_id);
 351         g_assert (handle);
 352
 353         context.ContextFlags = CONTEXT_INTEGER | CONTEXT_CONTROL;
 354
 355         if (!GetThreadContext (handle, &context)) {
 356                 CloseHandle (handle);
 357                 return FALSE;
 358         }
 359
 360         g_assert (context.ContextFlags & CONTEXT_INTEGER);
 361         g_assert (context.ContextFlags & CONTEXT_CONTROL);
 362
 363         memset (mono_context, 0, sizeof (MonoContext));
 364         mono_sigctx_to_monoctx (&context, mono_context);
 365
 366         CloseHandle (handle);
 367         return TRUE;
 368 }
 369 #endif /* G_HAVE_API_SUPPORT(HAVE_UWP_WINAPI_SUPPORT) */
 370
 371 gboolean
 372 mono_thread_state_init_from_handle (MonoThreadUnwindState *tctx, MonoThreadInfo *info)
 373 {
 374         DWORD id = mono_thread_info_get_tid (info);
 375         MonoJitTlsData *jit_tls;
 376         void *domain;
 377         MonoLMF *lmf = NULL;
 378         gpointer *addr;
 379
 380         tctx->valid = FALSE;
 381         tctx->unwind_data [MONO_UNWIND_DATA_DOMAIN] = NULL;
 382         tctx->unwind_data [MONO_UNWIND_DATA_LMF] = NULL;
 383         tctx->unwind_data [MONO_UNWIND_DATA_JIT_TLS] = NULL;
 384
 385         mono_setup_thread_context(id, &tctx->ctx);
 386
 387         /* mono_set_jit_tls () sets this */
 388         jit_tls = mono_thread_info_tls_get (info, TLS_KEY_JIT_TLS);
 389         /* SET_APPDOMAIN () sets this */
 390         domain = mono_thread_info_tls_get (info, TLS_KEY_DOMAIN);
 391
 392         /*Thread already started to cleanup, can no longer capture unwind state*/
 393         if (!jit_tls || !domain)
 394                 return FALSE;
 395
 396         /*
 397          * The current LMF address is kept in a separate TLS variable, and its hard to read its value without
 398          * arch-specific code. But the address of the TLS variable is stored in another TLS variable which
 399          * can be accessed through MonoThreadInfo.
 400          */
 401         /* mono_set_lmf_addr () sets this */
 402         addr = mono_thread_info_tls_get (info, TLS_KEY_LMF_ADDR);
 403         if (addr)
 404                 lmf = *addr;
 405
 406         tctx->unwind_data [MONO_UNWIND_DATA_DOMAIN] = domain;
 407         tctx->unwind_data [MONO_UNWIND_DATA_JIT_TLS] = jit_tls;
 408         tctx->unwind_data [MONO_UNWIND_DATA_LMF] = lmf;
 409         tctx->valid = TRUE;
 410
 411         return TRUE;
 412 }