3 * generic exception support
6 * Dietmar Maurer (dietmar@ximian.com)
7 * Mono Team (mono-list@lists.ximian.com)
9 * Copyright 2001-2003 Ximian, Inc.
10 * Copyright 2003-2008 Novell, Inc.
11 * Copyright 2011 Xamarin Inc (http://www.xamarin.com).
12 * Licensed under the MIT license. See LICENSE file in the project root for full license information.
23 #ifdef HAVE_EXECINFO_H
27 #ifdef HAVE_SYS_TYPES_H
28 #include <sys/types.h>
31 #ifdef HAVE_SYS_WAIT_H
39 #ifdef HAVE_SYS_SYSCALL_H
40 #include <sys/syscall.h>
43 #ifdef HAVE_SYS_PRCTL_H
44 #include <sys/prctl.h>
51 #include <mono/metadata/appdomain.h>
52 #include <mono/metadata/tabledefs.h>
53 #include <mono/metadata/threads.h>
54 #include <mono/metadata/threads-types.h>
55 #include <mono/metadata/debug-helpers.h>
56 #include <mono/metadata/exception.h>
57 #include <mono/metadata/exception-internals.h>
58 #include <mono/metadata/object-internals.h>
59 #include <mono/metadata/reflection-internals.h>
60 #include <mono/metadata/gc-internals.h>
61 #include <mono/metadata/debug-internals.h>
62 #include <mono/metadata/mono-debug.h>
63 #include <mono/metadata/profiler.h>
64 #include <mono/metadata/mono-endian.h>
65 #include <mono/metadata/environment.h>
66 #include <mono/metadata/mono-mlist.h>
67 #include <mono/utils/mono-mmap.h>
68 #include <mono/utils/mono-logger-internals.h>
69 #include <mono/utils/mono-error.h>
70 #include <mono/utils/mono-error-internals.h>
74 #include "debugger-agent.h"
75 #include "seq-points.h"
76 #include "llvm-runtime.h"
77 #include "mini-llvm.h"
78 #include "interp/interp.h"
81 #include "mini-llvm-cpp.h"
88 #ifndef MONO_ARCH_CONTEXT_DEF
89 #define MONO_ARCH_CONTEXT_DEF
92 #ifndef MONO_ARCH_STACK_GROWS_UP
93 #define MONO_ARCH_STACK_GROWS_UP 0
96 static gpointer restore_context_func, call_filter_func;
97 static gpointer throw_exception_func, rethrow_exception_func;
98 static gpointer throw_corlib_exception_func;
100 static gpointer try_more_restore_tramp = NULL;
101 static gpointer restore_stack_protection_tramp = NULL;
103 static void try_more_restore (void);
104 static void restore_stack_protection (void);
105 static void mono_walk_stack_full (MonoJitStackWalk func, MonoContext *start_ctx, MonoDomain *domain, MonoJitTlsData *jit_tls, MonoLMF *lmf, MonoUnwindOptions unwind_options, gpointer user_data);
106 static void mono_raise_exception_with_ctx (MonoException *exc, MonoContext *ctx);
107 static void mono_runtime_walk_stack_with_ctx (MonoJitStackWalk func, MonoContext *start_ctx, MonoUnwindOptions unwind_options, void *user_data);
108 static gboolean mono_current_thread_has_handle_block_guard (void);
111 first_managed (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer addr)
113 gpointer **data = (gpointer **)addr;
119 // FIXME: Happens with llvm_only
124 *data = MONO_CONTEXT_GET_SP (ctx);
130 mono_thread_get_managed_sp (void)
132 gpointer addr = NULL;
133 mono_walk_stack (first_managed, MONO_UNWIND_SIGNAL_SAFE, &addr);
138 mini_abort_threshold_offset (gpointer threshold, gpointer sp)
140 intptr_t stack_threshold = (intptr_t) threshold;
141 intptr_t stack_pointer = (intptr_t) sp;
143 const int direction = MONO_ARCH_STACK_GROWS_UP ? -1 : 1;
144 intptr_t magnitude = stack_pointer - stack_threshold;
146 return direction * magnitude;
150 mini_clear_abort_threshold (void)
152 MonoJitTlsData *jit_tls = mono_get_jit_tls ();
153 jit_tls->abort_exc_stack_threshold = NULL;
157 mini_set_abort_threshold (MonoContext *ctx)
159 gpointer sp = MONO_CONTEXT_GET_SP (ctx);
160 MonoJitTlsData *jit_tls = mono_get_jit_tls ();
161 // Only move it up, to avoid thrown/caught
162 // exceptions lower in the stack from triggering
164 gboolean above_threshold = mini_abort_threshold_offset (jit_tls->abort_exc_stack_threshold, sp) >= 0;
165 if (!jit_tls->abort_exc_stack_threshold || above_threshold) {
166 jit_tls->abort_exc_stack_threshold = sp;
170 // Note: In the case that the frame is above where the thread abort
171 // was set we bump the threshold so that functions called from the new,
172 // higher threshold don't trigger the thread abort exception
173 static inline gboolean
174 mini_above_abort_threshold (void)
176 gpointer sp = mono_thread_get_managed_sp ();
177 MonoJitTlsData *jit_tls = (MonoJitTlsData*) mono_tls_get_jit_tls ();
182 gboolean above_threshold = mini_abort_threshold_offset (jit_tls->abort_exc_stack_threshold, sp) >= 0;
185 jit_tls->abort_exc_stack_threshold = sp;
187 return above_threshold;
191 mono_get_seq_point_for_native_offset (MonoDomain *domain, MonoMethod *method, gint32 native_offset)
194 if (mono_find_prev_seq_point_for_native_offset (domain, method, native_offset, NULL, &sp))
200 mono_exceptions_init (void)
202 MonoRuntimeExceptionHandlingCallbacks cbs;
204 restore_context_func = mono_aot_get_trampoline ("restore_context");
205 call_filter_func = mono_aot_get_trampoline ("call_filter");
206 throw_exception_func = mono_aot_get_trampoline ("throw_exception");
207 rethrow_exception_func = mono_aot_get_trampoline ("rethrow_exception");
211 restore_context_func = mono_arch_get_restore_context (&info, FALSE);
212 mono_tramp_info_register (info, NULL);
213 call_filter_func = mono_arch_get_call_filter (&info, FALSE);
214 mono_tramp_info_register (info, NULL);
215 throw_exception_func = mono_arch_get_throw_exception (&info, FALSE);
216 mono_tramp_info_register (info, NULL);
217 rethrow_exception_func = mono_arch_get_rethrow_exception (&info, FALSE);
218 mono_tramp_info_register (info, NULL);
220 #ifdef MONO_ARCH_HAVE_RESTORE_STACK_SUPPORT
221 if (!mono_llvm_only) {
222 try_more_restore_tramp = mono_create_specific_trampoline (try_more_restore, MONO_TRAMPOLINE_RESTORE_STACK_PROT, mono_domain_get (), NULL);
223 restore_stack_protection_tramp = mono_create_specific_trampoline (restore_stack_protection, MONO_TRAMPOLINE_RESTORE_STACK_PROT, mono_domain_get (), NULL);
227 #ifdef MONO_ARCH_HAVE_EXCEPTIONS_INIT
228 mono_arch_exceptions_init ();
230 #ifdef ENABLE_INTERPRETER
231 if (mono_use_interpreter)
232 cbs.mono_walk_stack_with_ctx = interp_walk_stack_with_ctx;
235 cbs.mono_walk_stack_with_ctx = mono_runtime_walk_stack_with_ctx;
237 cbs.mono_walk_stack_with_state = mono_walk_stack_with_state;
240 cbs.mono_raise_exception = mono_llvm_raise_exception;
242 cbs.mono_raise_exception = (void (*)(MonoException *))mono_get_throw_exception ();
243 cbs.mono_raise_exception_with_ctx = mono_raise_exception_with_ctx;
244 cbs.mono_exception_walk_trace = mono_exception_walk_trace;
245 cbs.mono_install_handler_block_guard = mono_install_handler_block_guard;
246 cbs.mono_current_thread_has_handle_block_guard = mono_current_thread_has_handle_block_guard;
247 cbs.mono_clear_abort_threshold = mini_clear_abort_threshold;
248 cbs.mono_above_abort_threshold = mini_above_abort_threshold;
249 mono_install_eh_callbacks (&cbs);
250 mono_install_get_seq_point (mono_get_seq_point_for_native_offset);
254 mono_get_throw_exception (void)
256 g_assert (throw_exception_func);
257 return throw_exception_func;
261 mono_get_rethrow_exception (void)
263 g_assert (rethrow_exception_func);
264 return rethrow_exception_func;
268 mono_get_call_filter (void)
270 g_assert (call_filter_func);
271 return call_filter_func;
275 mono_get_restore_context (void)
277 g_assert (restore_context_func);
278 return restore_context_func;
282 mono_get_throw_corlib_exception (void)
284 gpointer code = NULL;
287 /* This depends on corlib classes so cannot be inited in mono_exceptions_init () */
288 if (throw_corlib_exception_func)
289 return throw_corlib_exception_func;
292 code = mono_aot_get_trampoline ("throw_corlib_exception");
294 code = mono_arch_get_throw_corlib_exception (&info, FALSE);
295 mono_tramp_info_register (info, NULL);
298 mono_memory_barrier ();
300 throw_corlib_exception_func = code;
302 return throw_corlib_exception_func;
306 * mono_get_throw_exception_addr:
308 * Return an address which stores the result of
309 * mono_get_throw_exception.
312 mono_get_throw_exception_addr (void)
314 return &throw_exception_func;
318 is_address_protected (MonoJitInfo *ji, MonoJitExceptionInfo *ei, gpointer ip)
320 MonoTryBlockHoleTableJitInfo *table;
325 if (ei->try_start > ip || ip >= ei->try_end)
328 if (!ji->has_try_block_holes)
331 table = mono_jit_info_get_try_block_hole_table_info (ji);
332 offset = (guint32)((char*)ip - (char*)ji->code_start);
333 clause = (guint16)(ei - ji->clauses);
334 g_assert (clause < ji->num_clauses);
336 for (i = 0; i < table->num_holes; ++i) {
337 MonoTryBlockHoleJitInfo *hole = &table->holes [i];
338 if (hole->clause == clause && hole->offset <= offset && hole->offset + hole->length > offset)
344 #ifdef MONO_ARCH_HAVE_UNWIND_BACKTRACE
347 static gboolean show_native_addresses = TRUE;
349 static gboolean show_native_addresses = FALSE;
352 static _Unwind_Reason_Code
353 build_stack_trace (struct _Unwind_Context *frame_ctx, void *state)
355 MonoDomain *domain = mono_domain_get ();
356 uintptr_t ip = _Unwind_GetIP (frame_ctx);
358 if (show_native_addresses || mono_jit_info_table_find (domain, (char*)ip)) {
359 GList **trace_ips = (GList **)state;
360 *trace_ips = g_list_prepend (*trace_ips, (gpointer)ip);
363 return _URC_NO_REASON;
367 get_unwind_backtrace (void)
371 _Unwind_Backtrace (build_stack_trace, &ips);
373 return g_slist_reverse (ips);
379 get_unwind_backtrace (void)
389 * Translate between the mono_arch_unwind_frame function and the old API.
392 find_jit_info (MonoDomain *domain, MonoJitTlsData *jit_tls, MonoJitInfo *res, MonoJitInfo *prev_ji, MonoContext *ctx,
393 MonoContext *new_ctx, MonoLMF **lmf, gboolean *managed)
395 StackFrameInfo frame;
398 gpointer ip = MONO_CONTEXT_GET_IP (ctx);
400 /* Avoid costly table lookup during stack overflow */
401 if (prev_ji && (ip > prev_ji->code_start && ((guint8*)ip < ((guint8*)prev_ji->code_start) + prev_ji->code_size)))
404 ji = mini_jit_info_table_find (domain, (char *)ip, NULL);
409 err = mono_arch_unwind_frame (domain, jit_tls, ji, ctx, new_ctx, lmf, NULL, &frame);
411 return (MonoJitInfo *)-1;
413 if (*lmf && ((*lmf) != jit_tls->first_lmf) && ((gpointer)MONO_CONTEXT_GET_SP (new_ctx) >= (gpointer)(*lmf))) {
415 * Remove any unused lmf.
416 * Mask out the lower bits which might be used to hold additional information.
418 *lmf = (MonoLMF *)(((gsize)(*lmf)->previous_lmf) & ~(SIZEOF_VOID_P -1));
421 /* Convert between the new and the old APIs */
422 switch (frame.type) {
423 case FRAME_TYPE_MANAGED:
427 case FRAME_TYPE_TRAMPOLINE:
429 case FRAME_TYPE_MANAGED_TO_NATIVE:
433 memset (res, 0, sizeof (MonoJitInfo));
434 res->d.method = frame.method;
437 case FRAME_TYPE_DEBUGGER_INVOKE: {
441 * The normal exception handling code can't handle this frame, so just
444 ji = find_jit_info (domain, jit_tls, res, NULL, new_ctx, &tmp_ctx, lmf, managed);
445 memcpy (new_ctx, &tmp_ctx, sizeof (MonoContext));
449 g_assert_not_reached ();
454 /* mono_find_jit_info:
456 * This function is used to gather information from @ctx. It return the
457 * MonoJitInfo of the corresponding function, unwinds one stack frame and
458 * stores the resulting context into @new_ctx. It also stores a string
459 * describing the stack location into @trace (if not NULL), and modifies
460 * the @lmf if necessary. @native_offset return the IP offset from the
461 * start of the function or -1 if that info is not available.
464 mono_find_jit_info (MonoDomain *domain, MonoJitTlsData *jit_tls, MonoJitInfo *res, MonoJitInfo *prev_ji, MonoContext *ctx,
465 MonoContext *new_ctx, char **trace, MonoLMF **lmf, int *native_offset,
469 gpointer ip = MONO_CONTEXT_GET_IP (ctx);
471 MonoMethod *method = NULL;
482 ji = find_jit_info (domain, jit_tls, res, prev_ji, ctx, new_ctx, lmf, &managed2);
484 if (ji == (gpointer)-1)
487 if (ji && !ji->is_trampoline)
488 method = jinfo_get_method (ji);
490 if (managed2 || (method && method->wrapper_type)) {
491 const char *real_ip, *start;
494 start = (const char *)ji->code_start;
496 /* ctx->ip points into native code */
497 real_ip = (const char*)MONO_CONTEXT_GET_IP (new_ctx);
499 real_ip = (const char*)ip;
501 if ((real_ip >= start) && (real_ip <= start + ji->code_size))
502 offset = real_ip - start;
507 *native_offset = offset;
510 if (!method->wrapper_type || method->wrapper_type == MONO_WRAPPER_DYNAMIC_METHOD)
514 *trace = mono_debug_print_stack_frame (method, offset, domain);
517 char *fname = mono_method_full_name (jinfo_get_method (res), TRUE);
518 *trace = g_strdup_printf ("in (unmanaged) %s", fname);
527 * mono_find_jit_info_ext:
529 * A version of mono_find_jit_info which returns all data in the StackFrameInfo
531 * A note about frames of type FRAME_TYPE_MANAGED_TO_NATIVE:
532 * - These frames are used to mark managed-to-native transitions, so CTX will refer to native
533 * code, and new_ctx will refer to the last managed frame. The caller should unwind once more
534 * to obtain the last managed frame.
535 * If SAVE_LOCATIONS is not NULL, it should point to an array of size MONO_MAX_IREGS.
536 * On return, it will be filled with the locations where callee saved registers are saved
537 * by the current frame. This is returned outside of StackFrameInfo because it can be
538 * quite large on some platforms.
539 * If ASYNC true, this function will be async safe, but some fields of frame and frame->ji will
543 mono_find_jit_info_ext (MonoDomain *domain, MonoJitTlsData *jit_tls,
544 MonoJitInfo *prev_ji, MonoContext *ctx,
545 MonoContext *new_ctx, char **trace, MonoLMF **lmf,
546 mgreg_t **save_locations,
547 StackFrameInfo *frame)
550 gpointer ip = MONO_CONTEXT_GET_IP (ctx);
552 MonoDomain *target_domain = domain;
553 MonoMethod *method = NULL;
554 gboolean async = mono_thread_info_is_async_context ();
559 /* Avoid costly table lookup during stack overflow */
560 if (prev_ji && (ip > prev_ji->code_start && ((guint8*)ip < ((guint8*)prev_ji->code_start) + prev_ji->code_size)))
563 ji = mini_jit_info_table_find (domain, (char *)ip, &target_domain);
566 target_domain = domain;
569 memset (save_locations, 0, MONO_MAX_IREGS * sizeof (mgreg_t*));
571 err = mono_arch_unwind_frame (target_domain, jit_tls, ji, ctx, new_ctx, lmf, save_locations, frame);
575 if (frame->type != FRAME_TYPE_INTERP_TO_MANAGED && *lmf && ((*lmf) != jit_tls->first_lmf) && ((gpointer)MONO_CONTEXT_GET_SP (new_ctx) >= (gpointer)(*lmf))) {
577 * Remove any unused lmf.
578 * Mask out the lower bits which might be used to hold additional information.
580 *lmf = (MonoLMF *)(((gsize)(*lmf)->previous_lmf) & ~(SIZEOF_VOID_P -1));
583 if (frame->ji && !frame->ji->is_trampoline && !frame->ji->async)
584 method = jinfo_get_method (frame->ji);
586 if (frame->type == FRAME_TYPE_MANAGED && method) {
587 if (!method->wrapper_type || method->wrapper_type == MONO_WRAPPER_DYNAMIC_METHOD)
588 frame->managed = TRUE;
591 if (frame->type == FRAME_TYPE_MANAGED_TO_NATIVE) {
593 * This type of frame is just a marker, the caller should unwind once more to get the
594 * last managed frame.
597 frame->method = NULL;
600 frame->native_offset = -1;
601 frame->domain = target_domain;
602 frame->async_context = async;
606 if (frame->type == FRAME_TYPE_MANAGED)
607 frame->method = method;
609 if (ji && (frame->managed || (method && method->wrapper_type))) {
610 const char *real_ip, *start;
612 start = (const char *)ji->code_start;
613 if (frame->type == FRAME_TYPE_MANAGED)
614 real_ip = (const char*)ip;
616 /* ctx->ip points into native code */
617 real_ip = (const char*)MONO_CONTEXT_GET_IP (new_ctx);
619 if ((real_ip >= start) && (real_ip <= start + ji->code_size))
620 frame->native_offset = real_ip - start;
622 frame->native_offset = -1;
626 *trace = mono_debug_print_stack_frame (method, frame->native_offset, domain);
628 if (trace && frame->method) {
629 char *fname = mono_method_full_name (frame->method, TRUE);
630 *trace = g_strdup_printf ("in (unmanaged) %s", fname);
640 MonoInterpStackIter interp_iter;
644 unwinder_init (Unwinder *unwinder)
646 memset (unwinder, 0, sizeof (Unwinder));
649 #if defined(__GNUC__) && defined(TARGET_ARM64)
650 /* gcc 4.9.2 seems to miscompile this on arm64 */
651 static __attribute__((optimize("O0"))) gboolean
655 unwinder_unwind_frame (Unwinder *unwinder,
656 MonoDomain *domain, MonoJitTlsData *jit_tls,
657 MonoJitInfo *prev_ji, MonoContext *ctx,
658 MonoContext *new_ctx, char **trace, MonoLMF **lmf,
659 mgreg_t **save_locations,
660 StackFrameInfo *frame)
662 if (unwinder->in_interp) {
663 unwinder->in_interp = mono_interp_frame_iter_next (&unwinder->interp_iter, frame);
664 if (!unwinder->in_interp) {
665 return unwinder_unwind_frame (unwinder, domain, jit_tls, prev_ji, ctx, new_ctx, trace, lmf, save_locations, frame);
669 gboolean res = mono_find_jit_info_ext (domain, jit_tls, prev_ji, ctx, new_ctx, trace, lmf,
670 save_locations, frame);
673 if (frame->type == FRAME_TYPE_INTERP_TO_MANAGED) {
674 unwinder->in_interp = TRUE;
675 mono_interp_frame_iter_init (&unwinder->interp_iter, frame->interp_exit_data);
682 * This function is async-safe.
685 get_generic_info_from_stack_frame (MonoJitInfo *ji, MonoContext *ctx)
687 MonoGenericJitInfo *gi;
691 if (!ji->has_generic_jit_info)
693 gi = mono_jit_info_get_generic_jit_info (ji);
699 * Search location list if available, it contains the precise location of the
700 * argument for every pc offset, even if the method was interrupted while it was in
704 int offset = (mgreg_t)MONO_CONTEXT_GET_IP (ctx) - (mgreg_t)ji->code_start;
707 for (i = 0; i < gi->nlocs; ++i) {
708 MonoDwarfLocListEntry *entry = &gi->locations [i];
710 if (offset >= entry->from && (offset < entry->to || entry->to == 0)) {
712 info = (gpointer)mono_arch_context_get_int_reg (ctx, entry->reg);
714 info = *(gpointer*)(gpointer)((char*)mono_arch_context_get_int_reg (ctx, entry->reg) + entry->offset);
718 g_assert (i < gi->nlocs);
721 info = (gpointer)mono_arch_context_get_int_reg (ctx, gi->this_reg);
723 info = *(gpointer*)(gpointer)((char*)mono_arch_context_get_int_reg (ctx, gi->this_reg) +
727 method = jinfo_get_method (ji);
728 if (mono_method_get_context (method)->method_inst) {
729 /* A MonoMethodRuntimeGenericContext* */
731 } else if ((method->flags & METHOD_ATTRIBUTE_STATIC) || method->klass->valuetype) {
735 /* Avoid returning a managed object */
736 MonoObject *this_obj = (MonoObject *)info;
738 return this_obj->vtable;
743 * generic_info is either a MonoMethodRuntimeGenericContext or a MonoVTable.
745 static MonoGenericContext
746 get_generic_context_from_stack_frame (MonoJitInfo *ji, gpointer generic_info)
748 MonoGenericContext context = { NULL, NULL };
749 MonoClass *klass, *method_container_class;
752 g_assert (generic_info);
754 method = jinfo_get_method (ji);
755 g_assert (method->is_inflated);
756 if (mono_method_get_context (method)->method_inst) {
757 MonoMethodRuntimeGenericContext *mrgctx = (MonoMethodRuntimeGenericContext *)generic_info;
759 klass = mrgctx->class_vtable->klass;
760 context.method_inst = mrgctx->method_inst;
761 g_assert (context.method_inst);
763 MonoVTable *vtable = (MonoVTable *)generic_info;
765 klass = vtable->klass;
768 //g_assert (!mono_class_is_gtd (method->klass));
769 if (mono_class_is_ginst (method->klass))
770 method_container_class = mono_class_get_generic_class (method->klass)->container_class;
772 method_container_class = method->klass;
774 /* class might refer to a subclass of method's class */
775 while (!(klass == method->klass || (mono_class_is_ginst (klass) && mono_class_get_generic_class (klass)->container_class == method_container_class))) {
776 klass = klass->parent;
780 if (mono_class_is_ginst (klass) || mono_class_is_gtd (klass))
781 context.class_inst = mini_class_get_context (klass)->class_inst;
783 if (mono_class_is_ginst (klass))
784 g_assert (mono_class_has_parent_and_ignore_generics (mono_class_get_generic_class (klass)->container_class, method_container_class));
786 g_assert (mono_class_has_parent_and_ignore_generics (klass, method_container_class));
792 get_method_from_stack_frame (MonoJitInfo *ji, gpointer generic_info)
795 MonoGenericContext context;
798 if (!ji->has_generic_jit_info || !mono_jit_info_get_generic_jit_info (ji)->has_this)
799 return jinfo_get_method (ji);
800 context = get_generic_context_from_stack_frame (ji, generic_info);
802 method = jinfo_get_method (ji);
803 method = mono_method_get_declaring_generic_method (method);
804 method = mono_class_inflate_generic_method_checked (method, &context, &error);
805 g_assert (mono_error_ok (&error)); /* FIXME don't swallow the error */
811 * mono_exception_walk_native_trace:
812 * \param ex The exception object whose frames should be walked
813 * \param func callback to call for each stack frame
814 * \param user_data data passed to the callback
815 * This function walks the stacktrace of an exception. For
816 * each frame the callback function is called with the relevant info.
817 * The walk ends when no more stack frames are found or when the callback
818 * returns a TRUE value.
822 mono_exception_walk_trace (MonoException *ex, MonoExceptionFrameWalk func, gpointer user_data)
824 MONO_REQ_GC_UNSAFE_MODE;
826 MonoDomain *domain = mono_domain_get ();
827 MonoArray *ta = ex->trace_ips;
833 len = mono_array_length (ta) >> 1;
834 for (i = 0; i < len; i++) {
835 gpointer ip = mono_array_get (ta, gpointer, i * 2 + 0);
836 gpointer generic_info = mono_array_get (ta, gpointer, i * 2 + 1);
837 MonoJitInfo *ji = mono_jit_info_table_find (domain, (char *)ip);
840 if (func (NULL, ip, 0, FALSE, user_data))
843 MonoMethod *method = get_method_from_stack_frame (ji, generic_info);
844 if (func (method, ji->code_start, (char *) ip - (char *) ji->code_start, TRUE, user_data))
853 ves_icall_get_trace (MonoException *exc, gint32 skip, MonoBoolean need_file_info)
856 MonoDomain *domain = mono_domain_get ();
858 MonoArray *ta = exc->trace_ips;
859 MonoDebugSourceLocation *location;
863 /* Exception is not thrown yet */
864 res = mono_array_new_checked (domain, mono_defaults.stack_frame_class, 0, &error);
865 mono_error_set_pending_exception (&error);
869 len = mono_array_length (ta) >> 1;
871 res = mono_array_new_checked (domain, mono_defaults.stack_frame_class, len > skip ? len - skip : 0, &error);
872 if (mono_error_set_pending_exception (&error))
875 for (i = skip; i < len; i++) {
877 MonoStackFrame *sf = (MonoStackFrame *)mono_object_new_checked (domain, mono_defaults.stack_frame_class, &error);
878 if (!mono_error_ok (&error)) {
879 mono_error_set_pending_exception (&error);
882 gpointer ip = mono_array_get (ta, gpointer, i * 2 + 0);
883 gpointer generic_info = mono_array_get (ta, gpointer, i * 2 + 1);
886 ji = mono_jit_info_table_find (domain, (char *)ip);
888 /* Unmanaged frame */
889 mono_array_setref (res, i, sf);
893 g_assert (ji != NULL);
896 /* Can't resolve actual method */
897 method = jinfo_get_method (ji);
899 method = get_method_from_stack_frame (ji, generic_info);
900 if (jinfo_get_method (ji)->wrapper_type) {
904 s = mono_method_get_name_full (method, TRUE, FALSE, MONO_TYPE_NAME_FORMAT_REFLECTION);
905 MonoString *name = mono_string_new_checked (domain, s, &error);
907 if (!is_ok (&error)) {
908 mono_error_set_pending_exception (&error);
911 MONO_OBJECT_SETREF (sf, internal_method_name, name);
914 MonoReflectionMethod *rm = mono_method_get_object_checked (domain, method, NULL, &error);
915 if (!mono_error_ok (&error)) {
916 mono_error_set_pending_exception (&error);
919 MONO_OBJECT_SETREF (sf, method, rm);
922 sf->method_index = ji->from_aot ? mono_aot_find_method_index (method) : 0xffffff;
923 sf->method_address = (gsize) ji->code_start;
924 sf->native_offset = (char *)ip - (char *)ji->code_start;
927 * mono_debug_lookup_source_location() returns both the file / line number information
928 * and the IL offset. Note that computing the IL offset is already an expensive
929 * operation, so we shouldn't call this method twice.
931 location = mono_debug_lookup_source_location (jinfo_get_method (ji), sf->native_offset, domain);
933 sf->il_offset = location->il_offset;
936 if (mono_find_prev_seq_point_for_native_offset (domain, jinfo_get_method (ji), sf->native_offset, NULL, &sp))
937 sf->il_offset = sp.il_offset;
942 if (need_file_info) {
943 if (location && location->source_file) {
944 MonoString *filename = mono_string_new_checked (domain, location->source_file, &error);
945 if (!is_ok (&error)) {
946 mono_error_set_pending_exception (&error);
949 MONO_OBJECT_SETREF (sf, filename, filename);
950 sf->line = location->row;
951 sf->column = location->column;
953 sf->line = sf->column = 0;
958 mono_debug_free_source_location (location);
959 mono_array_setref (res, i, sf);
966 mono_runtime_walk_stack_with_ctx (MonoJitStackWalk func, MonoContext *start_ctx, MonoUnwindOptions unwind_options, void *user_data)
969 MonoJitTlsData *jit_tls = (MonoJitTlsData *)mono_tls_get_jit_tls ();
970 if (jit_tls && jit_tls->orig_ex_ctx_set)
971 start_ctx = &jit_tls->orig_ex_ctx;
973 mono_walk_stack_with_ctx (func, start_ctx, unwind_options, user_data);
976 * mono_walk_stack_with_ctx:
977 * Unwind the current thread starting at \p start_ctx.
978 * If \p start_ctx is null, we capture the current context.
981 mono_walk_stack_with_ctx (MonoJitStackWalk func, MonoContext *start_ctx, MonoUnwindOptions unwind_options, void *user_data)
983 MonoContext extra_ctx;
984 MonoThreadInfo *thread = mono_thread_info_current_unchecked ();
985 MONO_ARCH_CONTEXT_DEF
987 if (!thread || !thread->jit_data)
991 mono_arch_flush_register_windows ();
993 #ifdef MONO_INIT_CONTEXT_FROM_CURRENT
994 MONO_INIT_CONTEXT_FROM_CURRENT (&extra_ctx);
996 MONO_INIT_CONTEXT_FROM_FUNC (&extra_ctx, mono_walk_stack_with_ctx);
998 start_ctx = &extra_ctx;
1001 mono_walk_stack_full (func, start_ctx, mono_domain_get (), (MonoJitTlsData *)thread->jit_data, mono_get_lmf (), unwind_options, user_data);
1005 * mono_walk_stack_with_state:
1006 * Unwind a thread described by \p state.
1008 * State must be valid (state->valid == TRUE).
1010 * If you are using this function to unwind another thread, make sure it is suspended.
1012 * If \p state is null, we capture the current context.
1015 mono_walk_stack_with_state (MonoJitStackWalk func, MonoThreadUnwindState *state, MonoUnwindOptions unwind_options, void *user_data)
1017 MonoThreadUnwindState extra_state;
1019 g_assert (!mono_thread_info_is_async_context ());
1020 if (!mono_thread_state_init_from_current (&extra_state))
1022 state = &extra_state;
1025 g_assert (state->valid);
1027 if (!state->unwind_data [MONO_UNWIND_DATA_DOMAIN])
1031 mono_walk_stack_full (func,
1033 (MonoDomain *)state->unwind_data [MONO_UNWIND_DATA_DOMAIN],
1034 (MonoJitTlsData *)state->unwind_data [MONO_UNWIND_DATA_JIT_TLS],
1035 (MonoLMF *)state->unwind_data [MONO_UNWIND_DATA_LMF],
1036 unwind_options, user_data);
1040 mono_walk_stack (MonoJitStackWalk func, MonoUnwindOptions options, void *user_data)
1042 MonoThreadUnwindState state;
1043 if (!mono_thread_state_init_from_current (&state))
1045 mono_walk_stack_with_state (func, &state, options, user_data);
1049 * mono_walk_stack_full:
1050 * \param func callback to call for each stack frame
1051 * \param domain starting appdomain, can be NULL to use the current domain
1052 * \param unwind_options what extra information the unwinder should gather
1053 * \param start_ctx starting state of the stack walk, can be NULL.
1054 * \param thread the thread whose stack to walk, can be NULL to use the current thread
1055 * \param lmf the LMF of \p thread, can be NULL to use the LMF of the current thread
1056 * \param user_data data passed to the callback
1057 * This function walks the stack of a thread, starting from the state
1058 * represented by \p start_ctx. For each frame the callback
1059 * function is called with the relevant info. The walk ends when no more
1060 * managed stack frames are found or when the callback returns a TRUE value.
1063 mono_walk_stack_full (MonoJitStackWalk func, MonoContext *start_ctx, MonoDomain *domain, MonoJitTlsData *jit_tls, MonoLMF *lmf, MonoUnwindOptions unwind_options, gpointer user_data)
1066 MonoContext ctx, new_ctx;
1067 StackFrameInfo frame;
1069 mgreg_t *reg_locations [MONO_MAX_IREGS];
1070 mgreg_t *new_reg_locations [MONO_MAX_IREGS];
1071 gboolean get_reg_locations = unwind_options & MONO_UNWIND_REG_LOCATIONS;
1072 gboolean async = mono_thread_info_is_async_context ();
1074 if (mono_llvm_only) {
1080 ips = get_unwind_backtrace ();
1081 for (l = ips; l; l = l->next) {
1082 guint8 *ip = (guint8*)l->data;
1083 memset (&frame, 0, sizeof (StackFrameInfo));
1084 frame.ji = mini_jit_info_table_find (domain, (char*)ip, &frame.domain);
1085 if (!frame.ji || frame.ji->is_trampoline)
1087 frame.type = FRAME_TYPE_MANAGED;
1088 frame.method = jinfo_get_method (frame.ji);
1089 // FIXME: Cannot lookup the actual method
1090 frame.actual_method = frame.method;
1091 if (frame.type == FRAME_TYPE_MANAGED) {
1092 if (!frame.method->wrapper_type || frame.method->wrapper_type == MONO_WRAPPER_DYNAMIC_METHOD)
1093 frame.managed = TRUE;
1095 frame.native_offset = ip - (guint8*)frame.ji->code_start;
1096 frame.il_offset = -1;
1098 if (func (&frame, NULL, user_data))
1105 g_assert (start_ctx);
1108 /*The LMF will be null if the target have no managed frames.*/
1109 /* g_assert (lmf); */
1112 g_assert (unwind_options == MONO_UNWIND_NONE);
1114 memcpy (&ctx, start_ctx, sizeof (MonoContext));
1115 memset (reg_locations, 0, sizeof (reg_locations));
1117 while (MONO_CONTEXT_GET_SP (&ctx) < jit_tls->end_of_stack) {
1119 res = mono_find_jit_info_ext (domain, jit_tls, NULL, &ctx, &new_ctx, NULL, &lmf, get_reg_locations ? new_reg_locations : NULL, &frame);
1123 if ((unwind_options & MONO_UNWIND_LOOKUP_IL_OFFSET) && frame.ji && !frame.ji->is_trampoline) {
1124 MonoDebugSourceLocation *source;
1126 source = mono_debug_lookup_source_location (jinfo_get_method (frame.ji), frame.native_offset, domain);
1128 il_offset = source->il_offset;
1131 if (mono_find_prev_seq_point_for_native_offset (domain, jinfo_get_method (frame.ji), frame.native_offset, NULL, &sp))
1132 il_offset = sp.il_offset;
1136 mono_debug_free_source_location (source);
1140 frame.il_offset = il_offset;
1142 if ((unwind_options & MONO_UNWIND_LOOKUP_ACTUAL_METHOD) && frame.ji && !frame.ji->is_trampoline) {
1143 frame.actual_method = get_method_from_stack_frame (frame.ji, get_generic_info_from_stack_frame (frame.ji, &ctx));
1145 frame.actual_method = frame.method;
1148 if (get_reg_locations)
1149 frame.reg_locations = reg_locations;
1151 if (func (&frame, &ctx, user_data))
1154 if (get_reg_locations) {
1155 for (i = 0; i < MONO_MAX_IREGS; ++i)
1156 if (new_reg_locations [i])
1157 reg_locations [i] = new_reg_locations [i];
1165 ves_icall_get_frame_info (gint32 skip, MonoBoolean need_file_info,
1166 MonoReflectionMethod **method,
1167 gint32 *iloffset, gint32 *native_offset,
1168 MonoString **file, gint32 *line, gint32 *column)
1171 MonoDomain *domain = mono_domain_get ();
1172 MonoJitTlsData *jit_tls = (MonoJitTlsData *)mono_tls_get_jit_tls ();
1173 MonoLMF *lmf = mono_get_lmf ();
1174 MonoJitInfo *ji = NULL;
1175 MonoContext ctx, new_ctx;
1176 MonoDebugSourceLocation *location;
1177 MonoMethod *jmethod = NULL, *actual_method;
1178 StackFrameInfo frame;
1183 MONO_ARCH_CONTEXT_DEF;
1185 if (mono_llvm_only) {
1187 MonoDomain *frame_domain;
1188 guint8 *frame_ip = NULL;
1190 /* FIXME: Generalize this code with an interface which returns an array of StackFrame structures */
1192 ips = get_unwind_backtrace ();
1193 for (l = ips; l && skip >= 0; l = l->next) {
1194 guint8 *ip = (guint8*)l->data;
1198 ji = mini_jit_info_table_find (mono_domain_get (), (char*)ip, &frame_domain);
1199 if (!ji || ji->is_trampoline)
1202 /* The skip count passed by the caller depends on us not filtering out MANAGED_TO_NATIVE */
1203 jmethod = jinfo_get_method (ji);
1204 if (jmethod->wrapper_type != MONO_WRAPPER_NONE && jmethod->wrapper_type != MONO_WRAPPER_DYNAMIC_METHOD && jmethod->wrapper_type != MONO_WRAPPER_MANAGED_TO_NATIVE)
1211 /* No way to resolve generic instances */
1212 actual_method = jmethod;
1213 *native_offset = frame_ip - (guint8*)ji->code_start;
1215 mono_arch_flush_register_windows ();
1217 #ifdef MONO_INIT_CONTEXT_FROM_CURRENT
1218 MONO_INIT_CONTEXT_FROM_CURRENT (&ctx);
1220 MONO_INIT_CONTEXT_FROM_FUNC (&ctx, ves_icall_get_frame_info);
1223 unwinder_init (&unwinder);
1228 res = unwinder_unwind_frame (&unwinder, domain, jit_tls, NULL, &ctx, &new_ctx, NULL, &lmf, NULL, &frame);
1231 switch (frame.type) {
1232 case FRAME_TYPE_MANAGED_TO_NATIVE:
1233 case FRAME_TYPE_DEBUGGER_INVOKE:
1234 case FRAME_TYPE_TRAMPOLINE:
1235 case FRAME_TYPE_INTERP_TO_MANAGED:
1237 case FRAME_TYPE_INTERP:
1242 *native_offset = frame.native_offset;
1244 /* The skip count passed by the caller depends on us not filtering out MANAGED_TO_NATIVE */
1245 jmethod = jinfo_get_method (ji);
1246 if (jmethod->wrapper_type != MONO_WRAPPER_NONE && jmethod->wrapper_type != MONO_WRAPPER_DYNAMIC_METHOD && jmethod->wrapper_type != MONO_WRAPPER_MANAGED_TO_NATIVE)
1251 } while (skip >= 0);
1253 if (frame.type == FRAME_TYPE_INTERP) {
1254 jmethod = frame.method;
1255 actual_method = frame.actual_method;
1256 *native_offset = frame.native_offset;
1258 actual_method = get_method_from_stack_frame (ji, get_generic_info_from_stack_frame (ji, &ctx));
1262 MonoReflectionMethod *rm = mono_method_get_object_checked (domain, actual_method, NULL, &error);
1263 if (!mono_error_ok (&error)) {
1264 mono_error_set_pending_exception (&error);
1267 mono_gc_wbarrier_generic_store (method, (MonoObject*) rm);
1269 if (il_offset != -1) {
1270 location = mono_debug_lookup_source_location_by_il (jmethod, il_offset, domain);
1272 location = mono_debug_lookup_source_location (jmethod, *native_offset, domain);
1275 *iloffset = location->il_offset;
1279 if (need_file_info) {
1281 MonoString *filename = mono_string_new_checked (domain, location->source_file, &error);
1282 if (!is_ok (&error)) {
1283 mono_error_set_pending_exception (&error);
1286 mono_gc_wbarrier_generic_store (file, (MonoObject*)filename);
1287 *line = location->row;
1288 *column = location->column;
1291 *line = *column = 0;
1295 mono_debug_free_source_location (location);
1301 get_exception_catch_class (MonoJitExceptionInfo *ei, MonoJitInfo *ji, MonoContext *ctx)
1304 MonoClass *catch_class = ei->data.catch_class;
1305 MonoType *inflated_type;
1306 MonoGenericContext context;
1308 /*MonoJitExceptionInfo::data is an union used by filter and finally clauses too.*/
1309 if (!catch_class || ei->flags != MONO_EXCEPTION_CLAUSE_NONE)
1312 if (!ji->has_generic_jit_info || !mono_jit_info_get_generic_jit_info (ji)->has_this)
1314 context = get_generic_context_from_stack_frame (ji, get_generic_info_from_stack_frame (ji, ctx));
1316 /* FIXME: we shouldn't inflate but instead put the
1317 type in the rgctx and fetch it from there. It
1318 might be a good idea to do this lazily, i.e. only
1319 when the exception is actually thrown, so as not to
1320 waste space for exception clauses which might never
1322 inflated_type = mono_class_inflate_generic_type_checked (&catch_class->byval_arg, &context, &error);
1323 mono_error_assert_ok (&error); /* FIXME don't swallow the error */
1325 catch_class = mono_class_from_mono_type (inflated_type);
1326 mono_metadata_free_type (inflated_type);
1332 * mini_jit_info_table_find_ext:
1334 * Same as mono_jit_info_table_find, but search all the domains of the current thread
1335 * if ADDR is not found in DOMAIN. The domain where the method was found is stored into
1336 * OUT_DOMAIN if it is not NULL.
1339 mini_jit_info_table_find_ext (MonoDomain *domain, char *addr, gboolean allow_trampolines, MonoDomain **out_domain)
1342 MonoInternalThread *t = mono_thread_internal_current ();
1348 ji = mono_jit_info_table_find_internal (domain, addr, TRUE, allow_trampolines);
1351 *out_domain = domain;
1355 /* maybe it is shared code, so we also search in the root domain */
1356 if (domain != mono_get_root_domain ()) {
1357 ji = mono_jit_info_table_find_internal (mono_get_root_domain (), addr, TRUE, allow_trampolines);
1360 *out_domain = mono_get_root_domain ();
1368 refs = (gpointer *)((t->appdomain_refs) ? *(gpointer *) t->appdomain_refs : NULL);
1369 for (; refs && *refs; refs++) {
1370 if (*refs != domain && *refs != mono_get_root_domain ()) {
1371 ji = mono_jit_info_table_find_internal ((MonoDomain*) *refs, addr, TRUE, allow_trampolines);
1374 *out_domain = (MonoDomain*) *refs;
1384 mini_jit_info_table_find (MonoDomain *domain, char *addr, MonoDomain **out_domain)
1386 return mini_jit_info_table_find_ext (domain, addr, FALSE, out_domain);
1389 /* Class lazy loading functions */
1390 static GENERATE_GET_CLASS_WITH_CACHE (runtime_compat_attr, "System.Runtime.CompilerServices", "RuntimeCompatibilityAttribute")
1393 * wrap_non_exception_throws:
1395 * Determine whenever M's assembly has a RuntimeCompatibilityAttribute with the
1396 * WrapNonExceptionThrows flag set.
1399 wrap_non_exception_throws (MonoMethod *m)
1402 MonoAssembly *ass = m->klass->image->assembly;
1403 MonoCustomAttrInfo* attrs;
1406 gboolean val = FALSE;
1409 if (ass->wrap_non_exception_throws_inited)
1410 return ass->wrap_non_exception_throws;
1412 klass = mono_class_get_runtime_compat_attr_class ();
1414 attrs = mono_custom_attrs_from_assembly_checked (ass, FALSE, &error);
1415 mono_error_cleanup (&error); /* FIXME don't swallow the error */
1417 for (i = 0; i < attrs->num_attrs; ++i) {
1418 MonoCustomAttrEntry *attr = &attrs->attrs [i];
1420 int num_named, named_type, name_len;
1423 if (!attr->ctor || attr->ctor->klass != klass)
1425 /* Decode the RuntimeCompatibilityAttribute. See reflection.c */
1426 p = (const char*)attr->data;
1427 g_assert (read16 (p) == 0x0001);
1429 num_named = read16 (p);
1435 /* data_type = *p; */
1438 if (named_type != 0x54)
1440 name_len = mono_metadata_decode_blob_size (p, &p);
1441 name = (char *)g_malloc (name_len + 1);
1442 memcpy (name, p, name_len);
1443 name [name_len] = 0;
1445 g_assert (!strcmp (name, "WrapNonExceptionThrows"));
1447 /* The value is a BOOLEAN */
1450 mono_custom_attrs_free (attrs);
1453 ass->wrap_non_exception_throws = val;
1454 mono_memory_barrier ();
1455 ass->wrap_non_exception_throws_inited = TRUE;
1460 #define MAX_UNMANAGED_BACKTRACE 128
1462 build_native_trace (MonoError *error)
1465 /* This puppy only makes sense on mobile, IOW, ARM. */
1466 #if defined (HAVE_BACKTRACE_SYMBOLS) && defined (TARGET_ARM)
1468 void *native_trace [MAX_UNMANAGED_BACKTRACE];
1471 size = backtrace (native_trace, MAX_UNMANAGED_BACKTRACE);
1477 res = mono_array_new_checked (mono_domain_get (), mono_defaults.int_class, size, error);
1478 return_val_if_nok (error, NULL);
1480 for (i = 0; i < size; i++)
1481 mono_array_set (res, gpointer, i, native_trace [i]);
1489 setup_stack_trace (MonoException *mono_ex, GSList *dynamic_methods, GList **trace_ips)
1492 *trace_ips = g_list_reverse (*trace_ips);
1494 MonoArray *ips_arr = mono_glist_to_array (*trace_ips, mono_defaults.int_class, &error);
1495 mono_error_assert_ok (&error);
1496 MONO_OBJECT_SETREF (mono_ex, trace_ips, ips_arr);
1497 MONO_OBJECT_SETREF (mono_ex, native_trace_ips, build_native_trace (&error));
1498 mono_error_assert_ok (&error);
1499 if (dynamic_methods) {
1500 /* These methods could go away anytime, so save a reference to them in the exception object */
1502 MonoMList *list = NULL;
1504 for (l = dynamic_methods; l; l = l->next) {
1506 MonoDomain *domain = mono_domain_get ();
1508 if (domain->method_to_dyn_method) {
1509 mono_domain_lock (domain);
1510 dis_link = (guint32)(size_t)g_hash_table_lookup (domain->method_to_dyn_method, l->data);
1511 mono_domain_unlock (domain);
1513 MonoObject *o = mono_gchandle_get_target (dis_link);
1515 list = mono_mlist_prepend_checked (list, o, &error);
1516 mono_error_assert_ok (&error);
1522 MONO_OBJECT_SETREF (mono_ex, dynamic_methods, list);
1525 g_list_free (*trace_ips);
1530 * mono_handle_exception_internal_first_pass:
1532 * The first pass of exception handling. Unwind the stack until a catch clause which can catch
1533 * OBJ is found. Run the index of the filter clause which caught the exception into
1534 * OUT_FILTER_IDX. Return TRUE if the exception is caught, FALSE otherwise.
1537 mono_handle_exception_internal_first_pass (MonoContext *ctx, MonoObject *obj, gint32 *out_filter_idx, MonoJitInfo **out_ji, MonoJitInfo **out_prev_ji, MonoObject *non_exception)
1540 MonoDomain *domain = mono_domain_get ();
1541 MonoJitInfo *ji = NULL;
1542 static int (*call_filter) (MonoContext *, gpointer) = NULL;
1543 MonoJitTlsData *jit_tls = (MonoJitTlsData *)mono_tls_get_jit_tls ();
1544 MonoLMF *lmf = mono_get_lmf ();
1545 GList *trace_ips = NULL;
1546 GSList *dynamic_methods = NULL;
1547 MonoException *mono_ex;
1548 gboolean stack_overflow = FALSE;
1549 MonoContext initial_ctx;
1551 int frame_count = 0;
1558 g_assert (ctx != NULL);
1560 if (obj == (MonoObject *)domain->stack_overflow_ex)
1561 stack_overflow = TRUE;
1563 mono_ex = (MonoException*)obj;
1564 MonoArray *initial_trace_ips = mono_ex->trace_ips;
1565 if (initial_trace_ips) {
1566 int len = mono_array_length (initial_trace_ips) >> 1;
1568 for (i = 0; i < (len - 1); i++) {
1569 gpointer ip = mono_array_get (initial_trace_ips, gpointer, i * 2 + 0);
1570 gpointer generic_info = mono_array_get (initial_trace_ips, gpointer, i * 2 + 1);
1571 trace_ips = g_list_prepend (trace_ips, ip);
1572 trace_ips = g_list_prepend (trace_ips, generic_info);
1576 if (!mono_object_isinst_checked (obj, mono_defaults.exception_class, &error)) {
1577 mono_error_assert_ok (&error);
1582 call_filter = (int (*) (MonoContext *, void *))mono_get_call_filter ();
1584 g_assert (jit_tls->end_of_stack);
1585 g_assert (jit_tls->abort_func);
1588 *out_filter_idx = -1;
1592 *out_prev_ji = NULL;
1596 unwinder_init (&unwinder);
1599 MonoContext new_ctx;
1601 int clause_index_start = 0;
1602 gboolean unwind_res = TRUE;
1604 StackFrameInfo frame;
1609 unwind_res = unwinder_unwind_frame (&unwinder, domain, jit_tls, NULL, ctx, &new_ctx, NULL, &lmf, NULL, &frame);
1611 setup_stack_trace (mono_ex, dynamic_methods, &trace_ips);
1612 g_slist_free (dynamic_methods);
1616 switch (frame.type) {
1617 case FRAME_TYPE_DEBUGGER_INVOKE:
1618 case FRAME_TYPE_MANAGED_TO_NATIVE:
1619 case FRAME_TYPE_TRAMPOLINE:
1620 case FRAME_TYPE_INTERP_TO_MANAGED:
1623 case FRAME_TYPE_INTERP:
1624 case FRAME_TYPE_MANAGED:
1627 g_assert_not_reached ();
1631 in_interp = frame.type == FRAME_TYPE_INTERP;
1636 ip = (guint16*)ji->code_start + frame.native_offset;
1638 ip = MONO_CONTEXT_GET_IP (ctx);
1641 method = jinfo_get_method (ji);
1642 //printf ("M: %s %d.\n", mono_method_full_name (method, TRUE), frame_count);
1644 if (mini_get_debug_options ()->reverse_pinvoke_exceptions && method->wrapper_type == MONO_WRAPPER_NATIVE_TO_MANAGED) {
1645 g_error ("A native frame was found while unwinding the stack after an exception.\n"
1646 "The native frame called the managed method:\n%s\n",
1647 mono_method_full_name (method, TRUE));
1650 if (method->wrapper_type != MONO_WRAPPER_RUNTIME_INVOKE && mono_ex) {
1651 // avoid giant stack traces during a stack overflow
1652 if (frame_count < 1000) {
1653 trace_ips = g_list_prepend (trace_ips, MONO_CONTEXT_GET_IP (ctx));
1654 trace_ips = g_list_prepend (trace_ips, get_generic_info_from_stack_frame (ji, ctx));
1658 if (method->dynamic)
1659 dynamic_methods = g_slist_prepend (dynamic_methods, method);
1661 if (stack_overflow) {
1662 if (MONO_ARCH_STACK_GROWS_UP)
1663 free_stack = (guint8*)(MONO_CONTEXT_GET_SP (&initial_ctx)) - (guint8*)(MONO_CONTEXT_GET_SP (ctx));
1665 free_stack = (guint8*)(MONO_CONTEXT_GET_SP (ctx)) - (guint8*)(MONO_CONTEXT_GET_SP (&initial_ctx));
1667 free_stack = 0xffffff;
1670 for (i = clause_index_start; i < ji->num_clauses; i++) {
1671 MonoJitExceptionInfo *ei = &ji->clauses [i];
1672 gboolean filtered = FALSE;
1675 * During stack overflow, wait till the unwinding frees some stack
1676 * space before running handlers/finalizers.
1678 if (free_stack <= (64 * 1024))
1681 if (is_address_protected (ji, ei, ip)) {
1683 MonoClass *catch_class = get_exception_catch_class (ei, ji, ctx);
1686 * Have to unwrap RuntimeWrappedExceptions if the
1687 * method's assembly doesn't have a RuntimeCompatibilityAttribute.
1689 if (non_exception && !wrap_non_exception_throws (method))
1690 ex_obj = non_exception;
1694 if (ei->flags == MONO_EXCEPTION_CLAUSE_FILTER) {
1695 #ifndef DISABLE_PERFCOUNTERS
1696 mono_perfcounters->exceptions_filters++;
1699 #ifndef MONO_CROSS_COMPILE
1700 #ifdef MONO_CONTEXT_SET_LLVM_EXC_REG
1702 MONO_CONTEXT_SET_LLVM_EXC_REG (ctx, ex_obj);
1704 /* Can't pass the ex object in a register yet to filter clauses, because call_filter () might not support it */
1705 *((gpointer *)(gpointer)((char *)MONO_CONTEXT_GET_BP (ctx) + ei->exvar_offset)) = ex_obj;
1707 g_assert (!ji->from_llvm);
1708 /* store the exception object in bp + ei->exvar_offset */
1709 *((gpointer *)(gpointer)((char *)MONO_CONTEXT_GET_BP (ctx) + ei->exvar_offset)) = ex_obj;
1713 #ifdef MONO_CONTEXT_SET_LLVM_EH_SELECTOR_REG
1715 * Pass the original il clause index to the landing pad so it can
1716 * branch to the landing pad associated with the il clause.
1717 * This is needed because llvm compiled code assumes that the EH
1718 * code always branches to the innermost landing pad.
1721 MONO_CONTEXT_SET_LLVM_EH_SELECTOR_REG (ctx, ei->clause_index);
1724 mono_debugger_agent_begin_exception_filter (mono_ex, ctx, &initial_ctx);
1725 filtered = call_filter (ctx, ei->data.filter);
1726 mono_debugger_agent_end_exception_filter (mono_ex, ctx, &initial_ctx);
1727 if (filtered && out_filter_idx)
1728 *out_filter_idx = filter_idx;
1734 setup_stack_trace (mono_ex, dynamic_methods, &trace_ips);
1735 g_slist_free (dynamic_methods);
1736 /* mono_debugger_agent_handle_exception () needs this */
1737 mini_set_abort_threshold (ctx);
1738 MONO_CONTEXT_SET_IP (ctx, ei->handler_start);
1743 MonoError isinst_error;
1744 error_init (&isinst_error);
1745 if (ei->flags == MONO_EXCEPTION_CLAUSE_NONE && mono_object_isinst_checked (ex_obj, catch_class, &error)) {
1746 setup_stack_trace (mono_ex, dynamic_methods, &trace_ips);
1747 g_slist_free (dynamic_methods);
1752 /* mono_debugger_agent_handle_exception () needs this */
1754 MONO_CONTEXT_SET_IP (ctx, ei->handler_start);
1757 mono_error_cleanup (&isinst_error);
1764 g_assert_not_reached ();
1768 * mono_handle_exception_internal:
1769 * \param ctx saved processor state
1770 * \param obj the exception object
1771 * \param resume whenever to resume unwinding based on the state in \c MonoJitTlsData.
1774 mono_handle_exception_internal (MonoContext *ctx, MonoObject *obj, gboolean resume, MonoJitInfo **out_ji)
1777 MonoDomain *domain = mono_domain_get ();
1778 MonoJitInfo *ji, *prev_ji;
1779 static int (*call_filter) (MonoContext *, gpointer) = NULL;
1780 MonoJitTlsData *jit_tls = (MonoJitTlsData *)mono_tls_get_jit_tls ();
1781 MonoLMF *lmf = mono_get_lmf ();
1782 MonoException *mono_ex;
1783 gboolean stack_overflow = FALSE;
1784 MonoContext initial_ctx;
1786 int frame_count = 0;
1787 gint32 filter_idx, first_filter_idx = 0;
1790 MonoObject *non_exception = NULL;
1794 g_assert (ctx != NULL);
1796 MonoException *ex = mono_get_exception_null_reference ();
1797 MonoString *msg = mono_string_new_checked (domain, "Object reference not set to an instance of an object", &error);
1798 mono_error_assert_ok (&error);
1799 MONO_OBJECT_SETREF (ex, message, msg);
1800 obj = (MonoObject *)ex;
1804 * Allocate a new exception object instead of the preconstructed ones.
1806 if (obj == (MonoObject *)domain->stack_overflow_ex) {
1808 * It is not a good idea to try and put even more pressure on the little stack available.
1809 * obj = mono_get_exception_stack_overflow ();
1811 stack_overflow = TRUE;
1813 else if (obj == (MonoObject *)domain->null_reference_ex) {
1814 obj = (MonoObject *)mono_get_exception_null_reference ();
1817 if (!mono_object_isinst_checked (obj, mono_defaults.exception_class, &error)) {
1818 mono_error_assert_ok (&error);
1819 non_exception = obj;
1820 obj = (MonoObject *)mono_get_exception_runtime_wrapped_checked (obj, &error);
1821 mono_error_assert_ok (&error);
1824 mono_ex = (MonoException*)obj;
1826 if (mini_get_debug_options ()->suspend_on_exception) {
1827 mono_runtime_printf_err ("Exception thrown, suspending...");
1832 if (mono_object_isinst_checked (obj, mono_defaults.exception_class, &error)) {
1833 mono_ex = (MonoException*)obj;
1835 mono_error_assert_ok (&error);
1839 if (mono_ex && jit_tls->class_cast_from) {
1840 if (!strcmp (mono_ex->object.vtable->klass->name, "InvalidCastException")) {
1841 char *from_name = mono_type_get_full_name (jit_tls->class_cast_from);
1842 char *to_name = mono_type_get_full_name (jit_tls->class_cast_to);
1843 char *msg = g_strdup_printf ("Unable to cast object of type '%s' to type '%s'.", from_name, to_name);
1844 mono_ex->message = mono_string_new_checked (domain, msg, &error);
1847 if (!is_ok (&error)) {
1848 mono_runtime_printf_err ("Error creating class cast exception message '%s'\n", msg);
1849 mono_error_assert_ok (&error);
1853 if (!strcmp (mono_ex->object.vtable->klass->name, "ArrayTypeMismatchException")) {
1854 char *from_name = mono_type_get_full_name (jit_tls->class_cast_from);
1855 char *to_name = mono_type_get_full_name (jit_tls->class_cast_to);
1856 char *msg = g_strdup_printf ("Source array of type '%s' cannot be cast to destination array type '%s'.", from_name, to_name);
1857 mono_ex->message = mono_string_new_checked (domain, msg, &error);
1860 if (!is_ok (&error)) {
1861 mono_runtime_printf_err ("Error creating array type mismatch exception message '%s'\n", msg);
1862 mono_error_assert_ok (&error);
1869 call_filter = (int (*)(MonoContext *, void*))mono_get_call_filter ();
1871 g_assert (jit_tls->end_of_stack);
1872 g_assert (jit_tls->abort_func);
1875 * We set orig_ex_ctx_set to TRUE/FALSE around profiler calls to make sure it doesn't
1876 * end up being TRUE on any code path.
1878 memcpy (&jit_tls->orig_ex_ctx, ctx, sizeof (MonoContext));
1883 MonoContext ctx_cp = *ctx;
1884 if (mono_trace_is_enabled ()) {
1885 MonoMethod *system_exception_get_message = mono_class_get_method_from_name (mono_defaults.exception_class, "get_Message", 0);
1886 MonoMethod *get_message = system_exception_get_message == NULL ? NULL : mono_object_get_virtual_method (obj, system_exception_get_message);
1887 MonoObject *message;
1888 const char *type_name = mono_class_get_name (mono_object_class (mono_ex));
1890 if (get_message == NULL) {
1892 } else if (!strcmp (type_name, "OutOfMemoryException") || !strcmp (type_name, "StackOverflowException")) {
1894 msg = g_strdup_printf ("(No exception message for: %s)\n", type_name);
1896 MonoObject *exc = NULL;
1897 message = mono_runtime_try_invoke (get_message, obj, NULL, &exc, &error);
1898 g_assert (exc == NULL);
1899 mono_error_assert_ok (&error);
1903 msg = mono_string_to_utf8_checked ((MonoString *) message, &error);
1904 if (!is_ok (&error)) {
1905 mono_error_cleanup (&error);
1906 msg = g_strdup ("(error while display System.Exception.Message property)");
1909 msg = g_strdup ("(System.Exception.Message property not available)");
1912 g_print ("[%p:] EXCEPTION handling: %s.%s: %s\n", (void*)mono_native_thread_id_get (), mono_object_class (obj)->name_space, mono_object_class (obj)->name, msg);
1914 if (mono_ex && mono_trace_eval_exception (mono_object_class (mono_ex)))
1915 mono_print_thread_dump_from_ctx (ctx);
1917 jit_tls->orig_ex_ctx_set = TRUE;
1918 mono_profiler_exception_thrown (obj);
1919 jit_tls->orig_ex_ctx_set = FALSE;
1921 res = mono_handle_exception_internal_first_pass (&ctx_cp, obj, &first_filter_idx, &ji, &prev_ji, non_exception);
1924 if (mini_get_debug_options ()->break_on_exc)
1926 mono_debugger_agent_handle_exception ((MonoException *)obj, ctx, NULL);
1928 if (mini_get_debug_options ()->suspend_on_unhandled) {
1929 mono_runtime_printf_err ("Unhandled exception, suspending...");
1934 // FIXME: This runs managed code so it might cause another stack overflow when
1935 // we are handling a stack overflow
1936 mini_set_abort_threshold (ctx);
1937 mono_unhandled_exception (obj);
1939 gboolean unhandled = FALSE;
1942 * The exceptions caught by the mono_runtime_invoke_checked () calls
1943 * in the threadpool needs to be treated as unhandled (#669836).
1945 * FIXME: The check below is hackish, but its hard to distinguish
1946 * these runtime invoke calls from others in the runtime.
1948 if (ji && jinfo_get_method (ji)->wrapper_type == MONO_WRAPPER_RUNTIME_INVOKE) {
1949 if (prev_ji && jinfo_get_method (prev_ji) == mono_defaults.threadpool_perform_wait_callback_method)
1954 mono_debugger_agent_handle_exception ((MonoException *)obj, ctx, NULL);
1956 mono_debugger_agent_handle_exception ((MonoException *)obj, ctx, &ctx_cp);
1965 unwinder_init (&unwinder);
1968 MonoContext new_ctx;
1970 int clause_index_start = 0;
1971 gboolean unwind_res = TRUE;
1972 StackFrameInfo frame;
1977 ji = jit_tls->resume_state.ji;
1978 new_ctx = jit_tls->resume_state.new_ctx;
1979 clause_index_start = jit_tls->resume_state.clause_index;
1980 lmf = jit_tls->resume_state.lmf;
1981 first_filter_idx = jit_tls->resume_state.first_filter_idx;
1982 filter_idx = jit_tls->resume_state.filter_idx;
1985 unwind_res = unwinder_unwind_frame (&unwinder, domain, jit_tls, NULL, ctx, &new_ctx, NULL, &lmf, NULL, &frame);
1987 *(mono_get_lmf_addr ()) = lmf;
1989 jit_tls->abort_func (obj);
1990 g_assert_not_reached ();
1992 switch (frame.type) {
1993 case FRAME_TYPE_DEBUGGER_INVOKE:
1994 case FRAME_TYPE_MANAGED_TO_NATIVE:
1995 case FRAME_TYPE_TRAMPOLINE:
1998 case FRAME_TYPE_INTERP_TO_MANAGED:
2000 case FRAME_TYPE_INTERP:
2001 case FRAME_TYPE_MANAGED:
2004 g_assert_not_reached ();
2007 in_interp = frame.type == FRAME_TYPE_INTERP;
2012 ip = (guint16*)ji->code_start + frame.native_offset;
2014 ip = MONO_CONTEXT_GET_IP (ctx);
2016 method = jinfo_get_method (ji);
2018 //printf ("M: %s %d.\n", mono_method_full_name (method, TRUE), frame_count);
2020 if (stack_overflow) {
2021 if (MONO_ARCH_STACK_GROWS_UP)
2022 free_stack = (guint8*)(MONO_CONTEXT_GET_SP (&initial_ctx)) - (guint8*)(MONO_CONTEXT_GET_SP (ctx));
2024 free_stack = (guint8*)(MONO_CONTEXT_GET_SP (ctx)) - (guint8*)(MONO_CONTEXT_GET_SP (&initial_ctx));
2026 free_stack = 0xffffff;
2029 for (i = clause_index_start; i < ji->num_clauses; i++) {
2030 MonoJitExceptionInfo *ei = &ji->clauses [i];
2031 gboolean filtered = FALSE;
2034 * During stack overflow, wait till the unwinding frees some stack
2035 * space before running handlers/finalizers.
2037 if (free_stack <= (64 * 1024))
2040 if (is_address_protected (ji, ei, ip)) {
2042 MonoClass *catch_class = get_exception_catch_class (ei, ji, ctx);
2045 * Have to unwrap RuntimeWrappedExceptions if the
2046 * method's assembly doesn't have a RuntimeCompatibilityAttribute.
2048 if (non_exception && !wrap_non_exception_throws (method))
2049 ex_obj = non_exception;
2053 if (((ei->flags == MONO_EXCEPTION_CLAUSE_NONE) || (ei->flags == MONO_EXCEPTION_CLAUSE_FILTER))) {
2054 #ifndef MONO_CROSS_COMPILE
2055 #ifdef MONO_CONTEXT_SET_LLVM_EXC_REG
2056 MONO_CONTEXT_SET_LLVM_EXC_REG (ctx, ex_obj);
2058 g_assert (!ji->from_llvm);
2059 /* store the exception object in bp + ei->exvar_offset */
2060 *((gpointer *)(gpointer)((char *)MONO_CONTEXT_GET_BP (ctx) + ei->exvar_offset)) = ex_obj;
2065 #ifdef MONO_CONTEXT_SET_LLVM_EH_SELECTOR_REG
2067 MONO_CONTEXT_SET_LLVM_EH_SELECTOR_REG (ctx, ei->clause_index);
2070 if (ei->flags == MONO_EXCEPTION_CLAUSE_FILTER) {
2072 * Filter clauses should only be run in the
2073 * first pass of exception handling.
2075 filtered = (filter_idx == first_filter_idx);
2079 error_init (&error);
2080 if ((ei->flags == MONO_EXCEPTION_CLAUSE_NONE &&
2081 mono_object_isinst_checked (ex_obj, catch_class, &error)) || filtered) {
2083 * This guards against the situation that we abort a thread that is executing a finally clause
2084 * that was called by the EH machinery. It won't have a guard trampoline installed, so we must
2085 * check for this situation here and resume interruption if we are below the guarded block.
2087 if (G_UNLIKELY (jit_tls->handler_block_return_address)) {
2088 gboolean is_outside = FALSE;
2089 gpointer prot_bp = MONO_CONTEXT_GET_BP (&jit_tls->handler_block_context);
2090 gpointer catch_bp = MONO_CONTEXT_GET_BP (ctx);
2091 //FIXME make this stack direction aware
2092 if (catch_bp > prot_bp) {
2094 } else if (catch_bp == prot_bp) {
2095 /* Can be either try { try { } catch {} } finally {} or try { try { } finally {} } catch {}
2096 * So we check if the catch handler_start is protected by the guarded handler protected region
2099 * If there is an outstanding guarded_block return address, it means the current thread must be aborted.
2100 * This is the only way to reach out the guarded block as other cases are handled by the trampoline.
2101 * There aren't any further finally/fault handler blocks down the stack over this exception.
2102 * This must be ensured by the code that installs the guard trampoline.
2104 g_assert (ji == mini_jit_info_table_find (domain, (char *)MONO_CONTEXT_GET_IP (&jit_tls->handler_block_context), NULL));
2106 if (!is_address_protected (ji, jit_tls->handler_block, ei->handler_start)) {
2111 jit_tls->handler_block_return_address = NULL;
2112 jit_tls->handler_block = NULL;
2113 mono_thread_resume_interruption (TRUE); /*We ignore the exception here, it will be raised later*/
2117 if (mono_trace_is_enabled () && mono_trace_eval (method))
2118 g_print ("EXCEPTION: catch found at clause %d of %s\n", i, mono_method_full_name (method, TRUE));
2119 jit_tls->orig_ex_ctx_set = TRUE;
2120 mono_profiler_exception_clause_handler (method, ei->flags, i);
2121 jit_tls->orig_ex_ctx_set = FALSE;
2122 mini_set_abort_threshold (ctx);
2126 * ctx->pc points into the interpreter, after the call which transitioned to
2127 * JITted code. Store the unwind state into the
2128 * interpeter state, then resume, the interpreter will unwind itself until
2129 * it reaches the target frame and will continue execution from there.
2130 * The resuming is kinda hackish, from the native code standpoint, it looks
2131 * like the call which transitioned to JITted code has succeeded, but the
2132 * return value register etc. is not set, so we have to be careful.
2134 mono_interp_set_resume_state (mono_ex, &frame, ei->handler_start);
2135 /* Undo the IP adjustment done by mono_arch_unwind_frame () */
2136 #if defined(TARGET_AMD64)
2137 ctx->gregs [AMD64_RIP] ++;
2138 #elif defined(TARGET_ARM)
2140 if (mono_arm_thumb_supported ())
2142 #elif defined(TARGET_ARM64)
2148 MONO_CONTEXT_SET_IP (ctx, ei->handler_start);
2151 #ifndef DISABLE_PERFCOUNTERS
2152 mono_perfcounters->exceptions_depth += frame_count;
2154 if (obj == (MonoObject *)domain->stack_overflow_ex)
2155 jit_tls->handling_stack_ovf = FALSE;
2159 mono_error_cleanup (&error);
2160 if (ei->flags == MONO_EXCEPTION_CLAUSE_FAULT) {
2161 if (mono_trace_is_enabled () && mono_trace_eval (method))
2162 g_print ("EXCEPTION: fault clause %d of %s\n", i, mono_method_full_name (method, TRUE));
2163 jit_tls->orig_ex_ctx_set = TRUE;
2164 mono_profiler_exception_clause_handler (method, ei->flags, i);
2165 jit_tls->orig_ex_ctx_set = FALSE;
2166 mini_set_abort_threshold (ctx);
2167 call_filter (ctx, ei->handler_start);
2169 if (ei->flags == MONO_EXCEPTION_CLAUSE_FINALLY) {
2170 if (mono_trace_is_enabled () && mono_trace_eval (method))
2171 g_print ("EXCEPTION: finally clause %d of %s\n", i, mono_method_full_name (method, TRUE));
2172 jit_tls->orig_ex_ctx_set = TRUE;
2173 mono_profiler_exception_clause_handler (method, ei->flags, i);
2174 jit_tls->orig_ex_ctx_set = FALSE;
2175 #ifndef DISABLE_PERFCOUNTERS
2176 mono_perfcounters->exceptions_finallys++;
2179 if (ji->from_llvm) {
2181 * LLVM compiled finally handlers follow the design
2182 * of the c++ ehabi, i.e. they call a resume function
2183 * at the end instead of returning to the caller.
2184 * So save the exception handling state,
2185 * mono_resume_unwind () will call us again to continue
2188 jit_tls->resume_state.ex_obj = obj;
2189 jit_tls->resume_state.ji = ji;
2190 jit_tls->resume_state.clause_index = i + 1;
2191 jit_tls->resume_state.ctx = *ctx;
2192 jit_tls->resume_state.new_ctx = new_ctx;
2193 jit_tls->resume_state.lmf = lmf;
2194 jit_tls->resume_state.first_filter_idx = first_filter_idx;
2195 jit_tls->resume_state.filter_idx = filter_idx;
2196 mini_set_abort_threshold (ctx);
2197 MONO_CONTEXT_SET_IP (ctx, ei->handler_start);
2200 mini_set_abort_threshold (ctx);
2202 mono_interp_run_finally (&frame, i, ei->handler_start);
2204 call_filter (ctx, ei->handler_start);
2210 jit_tls->orig_ex_ctx_set = TRUE;
2211 mono_profiler_exception_method_leave (method);
2212 jit_tls->orig_ex_ctx_set = FALSE;
2217 g_assert_not_reached ();
2221 * mono_debugger_run_finally:
2222 * \param start_ctx saved processor state
2223 * This method is called by the Mono Debugger to call all \c finally clauses of the
2224 * current stack frame. It's used when the user issues a \c return command to make
2225 * the current stack frame return. After returning from this method, the debugger
2226 * unwinds the stack one frame and gives control back to the user.
2227 * NOTE: This method is only used when running inside the Mono Debugger.
2230 mono_debugger_run_finally (MonoContext *start_ctx)
2232 static int (*call_filter) (MonoContext *, gpointer) = NULL;
2233 MonoDomain *domain = mono_domain_get ();
2234 MonoJitTlsData *jit_tls = (MonoJitTlsData *)mono_tls_get_jit_tls ();
2235 MonoLMF *lmf = mono_get_lmf ();
2236 MonoContext ctx, new_ctx;
2237 MonoJitInfo *ji, rji;
2242 ji = mono_find_jit_info (domain, jit_tls, &rji, NULL, &ctx, &new_ctx, NULL, &lmf, NULL, NULL);
2243 if (!ji || ji == (gpointer)-1)
2247 call_filter = (int (*)(MonoContext *, void *))mono_get_call_filter ();
2249 for (i = 0; i < ji->num_clauses; i++) {
2250 MonoJitExceptionInfo *ei = &ji->clauses [i];
2252 if (is_address_protected (ji, ei, MONO_CONTEXT_GET_IP (&ctx)) &&
2253 (ei->flags & MONO_EXCEPTION_CLAUSE_FINALLY)) {
2254 call_filter (&ctx, ei->handler_start);
2260 * mono_handle_exception:
2261 * \param ctx saved processor state
2262 * \param obj the exception object
2265 mono_handle_exception (MonoContext *ctx, MonoObject *obj)
2267 MONO_REQ_GC_UNSAFE_MODE;
2269 #ifndef DISABLE_PERFCOUNTERS
2270 mono_perfcounters->exceptions_thrown++;
2273 return mono_handle_exception_internal (ctx, obj, FALSE, NULL);
2276 #ifdef MONO_ARCH_SIGSEGV_ON_ALTSTACK
2278 #ifndef MONO_ARCH_USE_SIGACTION
2279 #error "Can't use sigaltstack without sigaction"
2282 #define ALIGN_TO(val,align) ((((guint64)val) + ((align) - 1)) & ~((align) - 1))
2285 mono_setup_altstack (MonoJitTlsData *tls)
2289 guint8 *staddr = NULL;
2291 if (mono_running_on_valgrind ())
2294 mono_thread_info_get_stack_bounds (&staddr, &stsize);
2298 tls->end_of_stack = staddr + stsize;
2299 tls->stack_size = stsize;
2301 /*g_print ("thread %p, stack_base: %p, stack_size: %d\n", (gpointer)pthread_self (), staddr, stsize);*/
2303 tls->stack_ovf_guard_base = staddr + mono_pagesize ();
2304 tls->stack_ovf_guard_size = ALIGN_TO (8 * 4096, mono_pagesize ());
2306 g_assert ((guint8*)&sa >= (guint8*)tls->stack_ovf_guard_base + tls->stack_ovf_guard_size);
2308 if (mono_mprotect (tls->stack_ovf_guard_base, tls->stack_ovf_guard_size, MONO_MMAP_NONE)) {
2309 /* mprotect can fail for the main thread stack */
2310 gpointer gaddr = mono_valloc (tls->stack_ovf_guard_base, tls->stack_ovf_guard_size, MONO_MMAP_NONE|MONO_MMAP_PRIVATE|MONO_MMAP_ANON|MONO_MMAP_FIXED, MONO_MEM_ACCOUNT_EXCEPTIONS);
2311 g_assert (gaddr == tls->stack_ovf_guard_base);
2312 tls->stack_ovf_valloced = TRUE;
2315 /* Setup an alternate signal stack */
2316 tls->signal_stack = mono_valloc (0, MONO_ARCH_SIGNAL_STACK_SIZE, MONO_MMAP_READ|MONO_MMAP_WRITE|MONO_MMAP_PRIVATE|MONO_MMAP_ANON, MONO_MEM_ACCOUNT_EXCEPTIONS);
2317 tls->signal_stack_size = MONO_ARCH_SIGNAL_STACK_SIZE;
2319 g_assert (tls->signal_stack);
2321 sa.ss_sp = tls->signal_stack;
2322 sa.ss_size = MONO_ARCH_SIGNAL_STACK_SIZE;
2324 g_assert (sigaltstack (&sa, NULL) == 0);
2326 mono_gc_register_altstack ((char*)tls->stack_ovf_guard_base + tls->stack_ovf_guard_size, (char*)staddr + stsize - ((char*)tls->stack_ovf_guard_base + tls->stack_ovf_guard_size), tls->signal_stack, tls->signal_stack_size);
2330 mono_free_altstack (MonoJitTlsData *tls)
2335 sa.ss_sp = tls->signal_stack;
2336 sa.ss_size = MONO_ARCH_SIGNAL_STACK_SIZE;
2337 sa.ss_flags = SS_DISABLE;
2338 err = sigaltstack (&sa, NULL);
2339 g_assert (err == 0);
2341 if (tls->signal_stack)
2342 mono_vfree (tls->signal_stack, MONO_ARCH_SIGNAL_STACK_SIZE, MONO_MEM_ACCOUNT_EXCEPTIONS);
2343 if (tls->stack_ovf_valloced)
2344 mono_vfree (tls->stack_ovf_guard_base, tls->stack_ovf_guard_size, MONO_MEM_ACCOUNT_EXCEPTIONS);
2346 mono_mprotect (tls->stack_ovf_guard_base, tls->stack_ovf_guard_size, MONO_MMAP_READ|MONO_MMAP_WRITE);
2349 #else /* !MONO_ARCH_SIGSEGV_ON_ALTSTACK */
2352 mono_setup_altstack (MonoJitTlsData *tls)
2357 mono_free_altstack (MonoJitTlsData *tls)
2361 #endif /* MONO_ARCH_SIGSEGV_ON_ALTSTACK */
2364 try_restore_stack_protection (MonoJitTlsData *jit_tls, int extra_bytes)
2366 gint32 unprotect_size = jit_tls->stack_ovf_guard_size;
2367 /* we need to leave some room for throwing the exception */
2368 while (unprotect_size >= 0 && (char*)jit_tls->stack_ovf_guard_base + unprotect_size > ((char*)&unprotect_size - extra_bytes))
2369 unprotect_size -= mono_pagesize ();
2370 /* at this point we could try and build a new domain->stack_overflow_ex, but only if there
2371 * is sufficient stack
2373 //fprintf (stderr, "restoring stack protection: %p-%p (%d)\n", jit_tls->stack_ovf_guard_base, (char*)jit_tls->stack_ovf_guard_base + unprotect_size, unprotect_size);
2375 mono_mprotect (jit_tls->stack_ovf_guard_base, unprotect_size, MONO_MMAP_NONE);
2376 return unprotect_size == jit_tls->stack_ovf_guard_size;
2379 static G_GNUC_UNUSED void
2380 try_more_restore (void)
2382 MonoJitTlsData *jit_tls = (MonoJitTlsData *)mono_tls_get_jit_tls ();
2383 if (try_restore_stack_protection (jit_tls, 500))
2384 jit_tls->restore_stack_prot = NULL;
2387 static G_GNUC_UNUSED void
2388 restore_stack_protection (void)
2390 MonoJitTlsData *jit_tls = (MonoJitTlsData *)mono_tls_get_jit_tls ();
2391 MonoException *ex = mono_domain_get ()->stack_overflow_ex;
2392 /* if we can't restore the stack protection, keep a callback installed so
2393 * we'll try to restore as much stack as we can at each return from unmanaged
2396 if (try_restore_stack_protection (jit_tls, 4096))
2397 jit_tls->restore_stack_prot = NULL;
2399 jit_tls->restore_stack_prot = try_more_restore_tramp;
2400 /* here we also throw a stack overflow exception */
2401 ex->trace_ips = NULL;
2402 ex->stack_trace = NULL;
2403 mono_raise_exception (ex);
2407 mono_altstack_restore_prot (mgreg_t *regs, guint8 *code, gpointer *tramp_data, guint8* tramp)
2409 MONO_REQ_GC_UNSAFE_MODE;
2411 void (*func)(void) = (void (*)(void))tramp_data;
2417 mono_handle_soft_stack_ovf (MonoJitTlsData *jit_tls, MonoJitInfo *ji, void *ctx, MONO_SIG_HANDLER_INFO_TYPE *siginfo, guint8* fault_addr)
2422 /* we got a stack overflow in the soft-guard pages
2423 * There are two cases:
2424 * 1) managed code caused the overflow: we unprotect the soft-guard page
2425 * and let the arch-specific code trigger the exception handling mechanism
2426 * in the thread stack. The soft-guard pages will be protected again as the stack is unwound.
2427 * 2) unmanaged code caused the overflow: we unprotect the soft-guard page
2428 * and hope we can continue with those enabled, at least until the hard-guard page
2429 * is hit. The alternative to continuing here is to just print a message and abort.
2430 * We may add in the future the code to protect the pages again in the codepath
2431 * when we return from unmanaged to managed code.
2433 if (jit_tls->stack_ovf_guard_size && fault_addr >= (guint8*)jit_tls->stack_ovf_guard_base &&
2434 fault_addr < (guint8*)jit_tls->stack_ovf_guard_base + jit_tls->stack_ovf_guard_size) {
2435 /* we unprotect the minimum amount we can */
2437 gboolean handled = FALSE;
2439 guard_size = jit_tls->stack_ovf_guard_size - (mono_pagesize () * SIZEOF_VOID_P / 4);
2440 while (guard_size && fault_addr < (guint8*)jit_tls->stack_ovf_guard_base + guard_size) {
2441 guard_size -= mono_pagesize ();
2443 guard_size = jit_tls->stack_ovf_guard_size - guard_size;
2444 /*fprintf (stderr, "unprotecting: %d\n", guard_size);*/
2445 mono_mprotect ((char*)jit_tls->stack_ovf_guard_base + jit_tls->stack_ovf_guard_size - guard_size, guard_size, MONO_MMAP_READ|MONO_MMAP_WRITE);
2446 #ifdef MONO_ARCH_SIGSEGV_ON_ALTSTACK
2448 mono_arch_handle_altstack_exception (ctx, siginfo, fault_addr, TRUE);
2453 /* We print a message: after this even managed stack overflows
2454 * may crash the runtime
2456 mono_runtime_printf_err ("Stack overflow in unmanaged: IP: %p, fault addr: %p", mono_arch_ip_from_context (ctx), fault_addr);
2457 if (!jit_tls->handling_stack_ovf) {
2458 jit_tls->restore_stack_prot = restore_stack_protection_tramp;
2459 jit_tls->handling_stack_ovf = 1;
2461 /*fprintf (stderr, "Already handling stack overflow\n");*/
2470 MonoMethod *omethod;
2472 } PrintOverflowUserData;
2474 #ifdef MONO_ARCH_HAVE_SIGCTX_TO_MONOCTX
2476 print_overflow_stack_frame (StackFrameInfo *frame, MonoContext *ctx, gpointer data)
2478 MonoMethod *method = NULL;
2479 PrintOverflowUserData *user_data = (PrintOverflowUserData *)data;
2482 if (frame->ji && frame->type != FRAME_TYPE_TRAMPOLINE)
2483 method = jinfo_get_method (frame->ji);
2486 if (user_data->count == 0) {
2487 /* The first frame is in its prolog, so a line number cannot be computed */
2488 user_data->count ++;
2492 /* If this is a one method overflow, skip the other instances */
2493 if (method == user_data->omethod)
2496 location = mono_debug_print_stack_frame (method, frame->native_offset, mono_domain_get ());
2497 mono_runtime_printf_err (" %s", location);
2500 if (user_data->count == 1) {
2501 mono_runtime_printf_err (" <...>");
2502 user_data->omethod = method;
2504 user_data->omethod = NULL;
2507 user_data->count ++;
2509 mono_runtime_printf_err (" at <unknown> <0x%05x>", frame->native_offset);
2516 mono_handle_hard_stack_ovf (MonoJitTlsData *jit_tls, MonoJitInfo *ji, void *ctx, guint8* fault_addr)
2518 #ifdef MONO_ARCH_HAVE_SIGCTX_TO_MONOCTX
2519 PrintOverflowUserData ud;
2523 /* we don't do much now, but we can warn the user with a useful message */
2524 mono_runtime_printf_err ("Stack overflow: IP: %p, fault addr: %p", mono_arch_ip_from_context (ctx), fault_addr);
2526 #ifdef MONO_ARCH_HAVE_SIGCTX_TO_MONOCTX
2527 mono_sigctx_to_monoctx (ctx, &mctx);
2529 mono_runtime_printf_err ("Stacktrace:");
2531 memset (&ud, 0, sizeof (ud));
2533 mono_walk_stack_with_ctx (print_overflow_stack_frame, &mctx, MONO_UNWIND_LOOKUP_ACTUAL_METHOD, &ud);
2535 if (ji && !ji->is_trampoline && jinfo_get_method (ji))
2536 mono_runtime_printf_err ("At %s", mono_method_full_name (jinfo_get_method (ji), TRUE));
2538 mono_runtime_printf_err ("At <unmanaged>.");
2545 print_stack_frame_to_stderr (StackFrameInfo *frame, MonoContext *ctx, gpointer data)
2547 MonoMethod *method = NULL;
2549 if (frame->ji && frame->type != FRAME_TYPE_TRAMPOLINE)
2550 method = jinfo_get_method (frame->ji);
2553 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, mono_domain_get ());
2554 mono_runtime_printf_err (" %s", location);
2557 mono_runtime_printf_err (" at <unknown> <0x%05x>", frame->native_offset);
2562 static G_GNUC_UNUSED gboolean
2563 print_stack_frame_to_string (StackFrameInfo *frame, MonoContext *ctx, gpointer data)
2565 GString *p = (GString*)data;
2566 MonoMethod *method = NULL;
2568 if (frame->ji && frame->type != FRAME_TYPE_TRAMPOLINE)
2569 method = jinfo_get_method (frame->ji);
2571 if (method && frame->domain) {
2572 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, frame->domain);
2573 g_string_append_printf (p, " %s\n", location);
2576 g_string_append_printf (p, " at <unknown> <0x%05x>\n", frame->native_offset);
2581 #ifndef MONO_CROSS_COMPILE
2583 static void print_process_map (void)
2586 FILE *fp = fopen ("/proc/self/maps", "r");
2590 mono_runtime_printf_err ("no /proc/self/maps, not on linux?\n");
2594 mono_runtime_printf_err ("/proc/self/maps:");
2596 while (fgets (line, sizeof (line), fp)) {
2598 size_t len = strlen (line) - 1;
2599 if (len >= 0 && line [len] == '\n')
2602 mono_runtime_printf_err ("%s", line);
2611 static gboolean handling_sigsegv = FALSE;
2614 * mono_handle_native_crash:
2616 * Handle a native crash (e.g. SIGSEGV) while in native code by
2617 * printing diagnostic information and aborting.
2620 mono_handle_native_crash (const char *signal, void *ctx, MONO_SIG_HANDLER_INFO_TYPE *info)
2622 #ifdef MONO_ARCH_USE_SIGACTION
2623 struct sigaction sa;
2625 MonoJitTlsData *jit_tls = (MonoJitTlsData *)mono_tls_get_jit_tls ();
2627 gboolean is_sigsegv = !strcmp ("SIGSEGV", signal);
2629 if (handling_sigsegv && is_sigsegv)
2632 if (mini_get_debug_options ()->suspend_on_native_crash) {
2633 mono_runtime_printf_err ("Received %s, suspending...", signal);
2644 /* To prevent infinite loops when the stack walk causes a crash */
2646 handling_sigsegv = TRUE;
2648 /* !jit_tls means the thread was not registered with the runtime */
2649 if (jit_tls && mono_thread_internal_current ()) {
2650 mono_runtime_printf_err ("Stacktrace:\n");
2652 /* FIXME: Is MONO_UNWIND_LOOKUP_IL_OFFSET correct here? */
2653 mono_walk_stack (print_stack_frame_to_stderr, MONO_UNWIND_LOOKUP_IL_OFFSET, NULL);
2656 print_process_map ();
2658 #ifdef HAVE_BACKTRACE_SYMBOLS
2664 mono_runtime_printf_err ("\nNative stacktrace:\n");
2666 size = backtrace (array, 256);
2667 names = backtrace_symbols (array, size);
2668 for (i =0; i < size; ++i) {
2669 mono_runtime_printf_err ("\t%s", names [i]);
2673 /* Try to get more meaningful information using gdb */
2675 #if !defined(HOST_WIN32) && defined(HAVE_SYS_SYSCALL_H) && defined(SYS_fork)
2676 if (!mini_get_debug_options ()->no_gdb_backtrace) {
2677 /* From g_spawn_command_line_sync () in eglib */
2680 pid_t crashed_pid = getpid ();
2683 * glibc fork acquires some locks, so if the crash happened inside malloc/free,
2684 * it will deadlock. Call the syscall directly instead.
2686 #if defined(PLATFORM_ANDROID)
2687 /* SYS_fork is defined to be __NR_fork which is not defined in some ndk versions */
2688 g_assert_not_reached ();
2689 #elif !defined(PLATFORM_MACOSX) && defined(SYS_fork)
2690 pid = (pid_t) syscall (SYS_fork);
2691 #elif defined(PLATFORM_MACOSX) && HAVE_FORK
2692 pid = (pid_t) fork ();
2694 g_assert_not_reached ();
2697 #if defined (HAVE_PRCTL) && defined(PR_SET_PTRACER)
2699 // Allow gdb to attach to the process even if ptrace_scope sysctl variable is set to
2700 // a value other than 0 (the most permissive ptrace scope). Most modern Linux
2701 // distributions set the scope to 1 which allows attaching only to direct children of
2702 // the current process
2703 prctl (PR_SET_PTRACER, pid, 0, 0, 0);
2707 dup2 (STDERR_FILENO, STDOUT_FILENO);
2709 mono_gdb_render_native_backtraces (crashed_pid);
2713 mono_runtime_printf_err ("\nDebug info from gdb:\n");
2714 waitpid (pid, &status, 0);
2719 #ifdef PLATFORM_ANDROID
2720 /* set DUMPABLE for this process so debuggerd can attach with ptrace(2), see:
2721 * https://android.googlesource.com/platform/bionic/+/151da681000c07da3c24cd30a3279b1ca017f452/linker/debugger.cpp#206
2722 * this has changed on later versions of Android. Also, we don't want to
2723 * set this on start-up as DUMPABLE has security implications. */
2724 prctl (PR_SET_DUMPABLE, 1);
2726 mono_runtime_printf_err ("\nNo native Android stacktrace (see debuggerd output).\n");
2731 * A SIGSEGV indicates something went very wrong so we can no longer depend
2732 * on anything working. So try to print out lots of diagnostics, starting
2733 * with ones which have a greater chance of working.
2735 mono_runtime_printf_err (
2737 "=================================================================\n"
2738 "Got a %s while executing native code. This usually indicates\n"
2739 "a fatal error in the mono runtime or one of the native libraries \n"
2740 "used by your application.\n"
2741 "=================================================================\n",
2744 #ifdef MONO_ARCH_USE_SIGACTION
2745 sa.sa_handler = SIG_DFL;
2746 sigemptyset (&sa.sa_mask);
2749 /* Remove our SIGABRT handler */
2750 g_assert (sigaction (SIGABRT, &sa, NULL) != -1);
2752 /* On some systems we get a SIGILL when calling abort (), because it might
2753 * fail to raise SIGABRT */
2754 g_assert (sigaction (SIGILL, &sa, NULL) != -1);
2757 if (!mono_do_crash_chaining) {
2758 /*Android abort is a fluke, it doesn't abort, it triggers another segv. */
2759 #if defined (PLATFORM_ANDROID)
2770 mono_handle_native_crash (const char *signal, void *ctx, MONO_SIG_HANDLER_INFO_TYPE *info)
2772 g_assert_not_reached ();
2775 #endif /* !MONO_CROSS_COMPILE */
2778 mono_print_thread_dump_internal (void *sigctx, MonoContext *start_ctx)
2780 MonoInternalThread *thread = mono_thread_internal_current ();
2781 #ifdef MONO_ARCH_HAVE_SIGCTX_TO_MONOCTX
2786 GError *error = NULL;
2791 text = g_string_new (0);
2793 name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
2795 g_string_append_printf (text, "\n\"%s\"", name);
2798 else if (thread->threadpool_thread)
2799 g_string_append (text, "\n\"<threadpool thread>\"");
2801 g_string_append (text, "\n\"<unnamed thread>\"");
2803 g_string_append_printf (text, " tid=0x%p this=0x%p ", (gpointer)(gsize)thread->tid, thread);
2804 mono_thread_internal_describe (thread, text);
2805 g_string_append (text, "\n");
2807 #ifdef MONO_ARCH_HAVE_SIGCTX_TO_MONOCTX
2809 memcpy (&ctx, start_ctx, sizeof (MonoContext));
2811 MONO_INIT_CONTEXT_FROM_FUNC (&ctx, mono_print_thread_dump);
2813 mono_sigctx_to_monoctx (sigctx, &ctx);
2815 mono_walk_stack_with_ctx (print_stack_frame_to_string, &ctx, MONO_UNWIND_LOOKUP_ALL, text);
2817 mono_runtime_printf ("\t<Stack traces in thread dumps not supported on this platform>");
2820 mono_runtime_printf ("%s", text->str);
2822 #if PLATFORM_WIN32 && TARGET_WIN32 && _DEBUG
2823 OutputDebugStringA(text->str);
2826 g_string_free (text, TRUE);
2827 mono_runtime_stdout_fflush ();
2831 * mono_print_thread_dump:
2833 * Print information about the current thread to stdout.
2834 * \p sigctx can be NULL, allowing this to be called from gdb.
2837 mono_print_thread_dump (void *sigctx)
2839 mono_print_thread_dump_internal (sigctx, NULL);
2843 mono_print_thread_dump_from_ctx (MonoContext *ctx)
2845 mono_print_thread_dump_internal (NULL, ctx);
2849 * mono_resume_unwind:
2851 * This is called by a trampoline from LLVM compiled finally clauses to continue
2855 mono_resume_unwind (MonoContext *ctx)
2857 MONO_REQ_GC_UNSAFE_MODE;
2859 MonoJitTlsData *jit_tls = (MonoJitTlsData *)mono_tls_get_jit_tls ();
2860 MonoContext new_ctx;
2862 MONO_CONTEXT_SET_IP (ctx, MONO_CONTEXT_GET_IP (&jit_tls->resume_state.ctx));
2863 MONO_CONTEXT_SET_SP (ctx, MONO_CONTEXT_GET_SP (&jit_tls->resume_state.ctx));
2866 mono_handle_exception_internal (&new_ctx, (MonoObject *)jit_tls->resume_state.ex_obj, TRUE, NULL);
2868 mono_restore_context (&new_ctx);
2871 #ifdef MONO_ARCH_HAVE_HANDLER_BLOCK_GUARD
2876 MonoJitExceptionInfo *ei;
2877 } FindHandlerBlockData;
2880 find_last_handler_block (StackFrameInfo *frame, MonoContext *ctx, gpointer data)
2884 FindHandlerBlockData *pdata = (FindHandlerBlockData *)data;
2885 MonoJitInfo *ji = frame->ji;
2890 ip = MONO_CONTEXT_GET_IP (ctx);
2892 for (i = 0; i < ji->num_clauses; ++i) {
2893 MonoJitExceptionInfo *ei = ji->clauses + i;
2894 if (ei->flags != MONO_EXCEPTION_CLAUSE_FINALLY)
2896 /*If ip points to the first instruction it means the handler block didn't start
2897 so we can leave its execution to the EH machinery*/
2898 if (ei->handler_start < ip && ip < ei->data.handler_end) {
2910 install_handler_block_guard (MonoJitInfo *ji, MonoContext *ctx)
2913 MonoJitExceptionInfo *clause = NULL;
2916 ip = MONO_CONTEXT_GET_IP (ctx);
2918 for (i = 0; i < ji->num_clauses; ++i) {
2919 clause = &ji->clauses [i];
2920 if (clause->flags != MONO_EXCEPTION_CLAUSE_FINALLY)
2922 if (clause->handler_start < ip && clause->data.handler_end > ip)
2926 /*no matching finally */
2927 if (i == ji->num_clauses)
2930 /*If we stopped on the instruction right before the try, we haven't actually started executing it*/
2931 if (ip == clause->handler_start)
2934 return mono_arch_install_handler_block_guard (ji, clause, ctx, mono_create_handler_block_trampoline ());
2938 * Finds the bottom handler block running and install a block guard if needed.
2941 mono_install_handler_block_guard (MonoThreadUnwindState *ctx)
2943 FindHandlerBlockData data = { 0 };
2944 MonoJitTlsData *jit_tls = (MonoJitTlsData *)ctx->unwind_data [MONO_UNWIND_DATA_JIT_TLS];
2947 #ifndef MONO_ARCH_HAVE_HANDLER_BLOCK_GUARD_AOT
2952 /* Guard against a null MonoJitTlsData. This can happens if the thread receives the
2953 * interrupt signal before the JIT has time to initialize its TLS data for the given thread.
2955 if (!jit_tls || jit_tls->handler_block_return_address)
2958 /* Do an async safe stack walk */
2959 mono_thread_info_set_is_async_context (TRUE);
2960 mono_walk_stack_with_state (find_last_handler_block, ctx, MONO_UNWIND_NONE, &data);
2961 mono_thread_info_set_is_async_context (FALSE);
2966 memcpy (&jit_tls->handler_block_context, &data.ctx, sizeof (MonoContext));
2968 resume_ip = install_handler_block_guard (data.ji, &data.ctx);
2969 if (resume_ip == NULL)
2972 jit_tls->handler_block_return_address = resume_ip;
2973 jit_tls->handler_block = data.ei;
2979 mono_current_thread_has_handle_block_guard (void)
2981 MonoJitTlsData *jit_tls = (MonoJitTlsData *)mono_tls_get_jit_tls ();
2982 return jit_tls && jit_tls->handler_block_return_address != NULL;
2987 mono_install_handler_block_guard (MonoThreadUnwindState *ctx)
2993 mono_current_thread_has_handle_block_guard (void)
3001 mono_set_cast_details (MonoClass *from, MonoClass *to)
3003 MonoJitTlsData *jit_tls = NULL;
3005 if (mini_get_debug_options ()->better_cast_details) {
3006 jit_tls = (MonoJitTlsData *)mono_tls_get_jit_tls ();
3007 jit_tls->class_cast_from = from;
3008 jit_tls->class_cast_to = to;
3013 /*returns false if the thread is not attached*/
3015 mono_thread_state_init_from_sigctx (MonoThreadUnwindState *ctx, void *sigctx)
3017 #ifdef MONO_ARCH_HAVE_SIGCTX_TO_MONOCTX
3018 MonoThreadInfo *thread = mono_thread_info_current_unchecked ();
3025 mono_sigctx_to_monoctx (sigctx, &ctx->ctx);
3027 ctx->unwind_data [MONO_UNWIND_DATA_DOMAIN] = mono_domain_get ();
3028 ctx->unwind_data [MONO_UNWIND_DATA_LMF] = mono_get_lmf ();
3029 ctx->unwind_data [MONO_UNWIND_DATA_JIT_TLS] = thread->jit_data;
3032 mono_thread_state_init (ctx);
3035 if (!ctx->unwind_data [MONO_UNWIND_DATA_DOMAIN] || !ctx->unwind_data [MONO_UNWIND_DATA_LMF])
3041 g_error ("Implement mono_arch_sigctx_to_monoctx for the current target");
3047 mono_thread_state_init (MonoThreadUnwindState *ctx)
3049 MonoThreadInfo *thread = mono_thread_info_current_unchecked ();
3051 #if defined(MONO_CROSS_COMPILE)
3052 ctx->valid = FALSE; //A cross compiler doesn't need to suspend.
3053 #elif MONO_ARCH_HAS_MONO_CONTEXT
3054 MONO_CONTEXT_GET_CURRENT (ctx->ctx);
3056 g_error ("Use a null sigctx requires a working mono-context");
3059 ctx->unwind_data [MONO_UNWIND_DATA_DOMAIN] = mono_domain_get ();
3060 ctx->unwind_data [MONO_UNWIND_DATA_LMF] = mono_get_lmf ();
3061 ctx->unwind_data [MONO_UNWIND_DATA_JIT_TLS] = thread ? thread->jit_data : NULL;
3067 mono_thread_state_init_from_monoctx (MonoThreadUnwindState *ctx, MonoContext *mctx)
3069 MonoThreadInfo *thread = mono_thread_info_current_unchecked ();
3076 ctx->unwind_data [MONO_UNWIND_DATA_DOMAIN] = mono_domain_get ();
3077 ctx->unwind_data [MONO_UNWIND_DATA_LMF] = mono_get_lmf ();
3078 ctx->unwind_data [MONO_UNWIND_DATA_JIT_TLS] = thread->jit_data;
3083 /*returns false if the thread is not attached*/
3085 mono_thread_state_init_from_current (MonoThreadUnwindState *ctx)
3087 MonoThreadInfo *thread = mono_thread_info_current_unchecked ();
3088 MONO_ARCH_CONTEXT_DEF
3090 mono_arch_flush_register_windows ();
3092 if (!thread || !thread->jit_data) {
3096 #ifdef MONO_INIT_CONTEXT_FROM_CURRENT
3097 MONO_INIT_CONTEXT_FROM_CURRENT (&ctx->ctx);
3099 MONO_INIT_CONTEXT_FROM_FUNC (&ctx->ctx, mono_thread_state_init_from_current);
3102 ctx->unwind_data [MONO_UNWIND_DATA_DOMAIN] = mono_domain_get ();
3103 ctx->unwind_data [MONO_UNWIND_DATA_LMF] = mono_get_lmf ();
3104 ctx->unwind_data [MONO_UNWIND_DATA_JIT_TLS] = thread->jit_data;
3110 mono_raise_exception_with_ctx (MonoException *exc, MonoContext *ctx)
3112 mono_handle_exception (ctx, (MonoObject *)exc);
3113 mono_restore_context (ctx);
3116 /*FIXME Move all monoctx -> sigctx conversion to signal handlers once all archs support utils/mono-context */
3118 mono_setup_async_callback (MonoContext *ctx, void (*async_cb)(void *fun), gpointer user_data)
3120 #ifdef MONO_ARCH_HAVE_SETUP_ASYNC_CALLBACK
3121 MonoJitTlsData *jit_tls = (MonoJitTlsData *)mono_tls_get_jit_tls ();
3122 jit_tls->ex_ctx = *ctx;
3124 mono_arch_setup_async_callback (ctx, async_cb, user_data);
3126 g_error ("This target doesn't support mono_arch_setup_async_callback");
3131 * mono_restore_context:
3133 * Call the architecture specific restore context function.
3136 mono_restore_context (MonoContext *ctx)
3138 static void (*restore_context) (MonoContext *);
3140 if (!restore_context)
3141 restore_context = (void (*)(MonoContext *))mono_get_restore_context ();
3142 restore_context (ctx);
3143 g_assert_not_reached ();
3147 * mono_jinfo_get_unwind_info:
3149 * Return the unwind info for JI.
3152 mono_jinfo_get_unwind_info (MonoJitInfo *ji, guint32 *unwind_info_len)
3154 if (ji->has_unwind_info) {
3155 /* The address/length in the MonoJitInfo structure itself */
3156 MonoUnwindJitInfo *info = mono_jit_info_get_unwind_info (ji);
3157 *unwind_info_len = info->unw_info_len;
3158 return info->unw_info;
3159 } else if (ji->from_aot)
3160 return mono_aot_get_unwind_info (ji, unwind_info_len);
3162 return mono_get_cached_unwind_info (ji->unwind_info, unwind_info_len);
3166 mono_jinfo_get_epilog_size (MonoJitInfo *ji)
3168 MonoArchEHJitInfo *info;
3170 info = mono_jit_info_get_arch_eh_info (ji);
3173 return info->epilog_size;
3177 * LLVM/Bitcode exception handling.
3181 throw_exception (MonoObject *ex, gboolean rethrow)
3183 MONO_REQ_GC_UNSAFE_MODE;
3186 MonoJitTlsData *jit_tls = mono_get_jit_tls ();
3187 MonoException *mono_ex;
3189 if (!mono_object_isinst_checked (ex, mono_defaults.exception_class, &error)) {
3190 mono_error_assert_ok (&error);
3191 mono_ex = mono_get_exception_runtime_wrapped_checked (ex, &error);
3192 mono_error_assert_ok (&error);
3193 jit_tls->thrown_non_exc = mono_gchandle_new (ex, FALSE);
3196 mono_ex = (MonoException*)ex;
3199 jit_tls->thrown_exc = mono_gchandle_new ((MonoObject*)mono_ex, FALSE);
3202 #ifdef MONO_ARCH_HAVE_UNWIND_BACKTRACE
3203 GList *l, *ips = NULL;
3206 _Unwind_Backtrace (build_stack_trace, &ips);
3207 /* The list contains ip-gshared info pairs */
3209 ips = g_list_reverse (ips);
3210 for (l = ips; l; l = l->next) {
3211 trace = g_list_append (trace, l->data);
3212 trace = g_list_append (trace, NULL);
3214 MonoArray *ips_arr = mono_glist_to_array (trace, mono_defaults.int_class, &error);
3215 mono_error_assert_ok (&error);
3216 MONO_OBJECT_SETREF (mono_ex, trace_ips, ips_arr);
3218 g_list_free (trace);
3222 mono_llvm_cpp_throw_exception ();
3226 mono_llvm_throw_exception (MonoObject *ex)
3228 throw_exception (ex, FALSE);
3232 mono_llvm_rethrow_exception (MonoObject *ex)
3234 throw_exception (ex, TRUE);
3238 mono_llvm_raise_exception (MonoException *e)
3240 mono_llvm_throw_exception ((MonoObject*)e);
3244 mono_llvm_throw_corlib_exception (guint32 ex_token_index)
3246 guint32 ex_token = MONO_TOKEN_TYPE_DEF | ex_token_index;
3249 ex = mono_exception_from_token (mono_defaults.exception_class->image, ex_token);
3251 mono_llvm_throw_exception ((MonoObject*)ex);
3255 * mono_llvm_resume_exception:
3257 * Resume exception propagation.
3260 mono_llvm_resume_exception (void)
3262 mono_llvm_cpp_throw_exception ();
3266 * mono_llvm_load_exception:
3268 * Return the currently thrown exception.
3271 mono_llvm_load_exception (void)
3274 MonoJitTlsData *jit_tls = mono_get_jit_tls ();
3276 MonoException *mono_ex = (MonoException*)mono_gchandle_get_target (jit_tls->thrown_exc);
3278 if (mono_ex->trace_ips) {
3279 GList *trace_ips = NULL;
3280 gpointer ip = __builtin_return_address (0);
3282 size_t upper = mono_array_length (mono_ex->trace_ips);
3284 for (int i = 0; i < upper; i+= 2) {
3285 gpointer curr_ip = mono_array_get (mono_ex->trace_ips, gpointer, i);
3286 gpointer curr_info = mono_array_get (mono_ex->trace_ips, gpointer, i + 1);
3287 trace_ips = g_list_append (trace_ips, curr_ip);
3288 trace_ips = g_list_append (trace_ips, curr_info);
3294 // FIXME: Does this work correctly for rethrows?
3295 // We may be discarding useful information
3296 // when this gets GC'ed
3297 MonoArray *ips_arr = mono_glist_to_array (trace_ips, mono_defaults.int_class, &error);
3298 mono_error_assert_ok (&error);
3299 MONO_OBJECT_SETREF (mono_ex, trace_ips, ips_arr);
3300 g_list_free (trace_ips);
3303 //MONO_OBJECT_SETREF (mono_ex, stack_trace, ves_icall_System_Exception_get_trace (mono_ex));
3305 MONO_OBJECT_SETREF (mono_ex, trace_ips, mono_array_new_checked (mono_domain_get (), mono_defaults.int_class, 0, &error));
3306 mono_error_assert_ok (&error);
3307 MONO_OBJECT_SETREF (mono_ex, stack_trace, mono_array_new_checked (mono_domain_get (), mono_defaults.stack_frame_class, 0, &error));
3308 mono_error_assert_ok (&error);
3311 return &mono_ex->object;
3315 * mono_llvm_clear_exception:
3317 * Mark the currently thrown exception as handled.
3320 mono_llvm_clear_exception (void)
3322 MonoJitTlsData *jit_tls = mono_get_jit_tls ();
3323 mono_gchandle_free (jit_tls->thrown_exc);
3324 jit_tls->thrown_exc = 0;
3325 if (jit_tls->thrown_non_exc)
3326 mono_gchandle_free (jit_tls->thrown_non_exc);
3327 jit_tls->thrown_non_exc = 0;
3329 mono_memory_barrier ();
3333 * mono_llvm_match_exception:
3335 * Return the innermost clause containing REGION_START-REGION_END which can handle
3336 * the current exception.
3339 mono_llvm_match_exception (MonoJitInfo *jinfo, guint32 region_start, guint32 region_end, gpointer rgctx, MonoObject *this_obj)
3342 MonoJitTlsData *jit_tls = mono_get_jit_tls ();
3346 g_assert (jit_tls->thrown_exc);
3347 exc = mono_gchandle_get_target (jit_tls->thrown_exc);
3348 if (jit_tls->thrown_non_exc) {
3350 * Have to unwrap RuntimeWrappedExceptions if the
3351 * method's assembly doesn't have a RuntimeCompatibilityAttribute.
3353 if (!wrap_non_exception_throws (jinfo_get_method (jinfo)))
3354 exc = mono_gchandle_get_target (jit_tls->thrown_non_exc);
3357 for (int i = 0; i < jinfo->num_clauses; i++) {
3358 MonoJitExceptionInfo *ei = &jinfo->clauses [i];
3359 MonoClass *catch_class;
3361 if (! (ei->try_offset == region_start && ei->try_offset + ei->try_len == region_end) )
3364 catch_class = ei->data.catch_class;
3365 if (mono_class_is_open_constructed_type (&catch_class->byval_arg)) {
3366 MonoGenericContext context;
3367 MonoType *inflated_type;
3369 g_assert (rgctx || this_obj);
3370 context = get_generic_context_from_stack_frame (jinfo, rgctx ? rgctx : this_obj->vtable);
3371 inflated_type = mono_class_inflate_generic_type_checked (&catch_class->byval_arg, &context, &error);
3372 mono_error_assert_ok (&error); /* FIXME don't swallow the error */
3374 catch_class = mono_class_from_mono_type (inflated_type);
3375 mono_metadata_free_type (inflated_type);
3378 // FIXME: Handle edge cases handled in get_exception_catch_class
3379 if (ei->flags == MONO_EXCEPTION_CLAUSE_NONE && mono_object_isinst_checked (exc, catch_class, &error)) {
3380 index = ei->clause_index;
3383 mono_error_assert_ok (&error);
3385 if (ei->flags == MONO_EXCEPTION_CLAUSE_FILTER) {
3386 g_assert_not_reached ();
3395 mono_debug_personality (int a, _Unwind_Action b,
3396 uint64_t c, struct _Unwind_Exception *d, struct _Unwind_Context *e)
3398 g_assert_not_reached ();
3402 mono_debug_personality (void);
3405 mono_debug_personality (void)
3407 g_assert_not_reached ();
3411 #ifndef ENABLE_INTERPRETER
3412 /* Stubs of interpreter functions */
3414 mono_interp_set_resume_state (MonoException *ex, StackFrameInfo *frame, gpointer handler_ip)
3416 g_assert_not_reached ();
3420 mono_interp_run_finally (StackFrameInfo *frame, int clause_index, gpointer handler_ip)
3422 g_assert_not_reached ();
3426 mono_interp_frame_iter_init (MonoInterpStackIter *iter, gpointer interp_exit_data)
3428 g_assert_not_reached ();
3432 mono_interp_frame_iter_next (MonoInterpStackIter *iter, StackFrameInfo *frame)
3434 g_assert_not_reached ();