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"
84 #ifndef MONO_ARCH_CONTEXT_DEF
85 #define MONO_ARCH_CONTEXT_DEF
88 #ifndef MONO_ARCH_STACK_GROWS_UP
89 #define MONO_ARCH_STACK_GROWS_UP 0
92 static gpointer restore_context_func, call_filter_func;
93 static gpointer throw_exception_func, rethrow_exception_func;
94 static gpointer throw_corlib_exception_func;
96 static gpointer try_more_restore_tramp = NULL;
97 static gpointer restore_stack_protection_tramp = NULL;
99 static void try_more_restore (void);
100 static void restore_stack_protection (void);
101 static void mono_walk_stack_full (MonoJitStackWalk func, MonoContext *start_ctx, MonoDomain *domain, MonoJitTlsData *jit_tls, MonoLMF *lmf, MonoUnwindOptions unwind_options, gpointer user_data);
102 static void mono_raise_exception_with_ctx (MonoException *exc, MonoContext *ctx);
103 static void mono_runtime_walk_stack_with_ctx (MonoJitStackWalk func, MonoContext *start_ctx, MonoUnwindOptions unwind_options, void *user_data);
104 static gboolean mono_current_thread_has_handle_block_guard (void);
107 first_managed (MonoStackFrameInfo *frame, MonoContext *ctx, gpointer addr)
109 gpointer **data = (gpointer **)addr;
115 // FIXME: Happens with llvm_only
120 *data = MONO_CONTEXT_GET_SP (ctx);
126 mono_thread_get_managed_sp (void)
128 gpointer addr = NULL;
129 mono_walk_stack (first_managed, MONO_UNWIND_SIGNAL_SAFE, &addr);
134 mini_abort_threshold_offset (gpointer threshold, gpointer sp)
136 intptr_t stack_threshold = (intptr_t) threshold;
137 intptr_t stack_pointer = (intptr_t) sp;
139 const int direction = MONO_ARCH_STACK_GROWS_UP ? -1 : 1;
140 intptr_t magnitude = stack_pointer - stack_threshold;
142 return direction * magnitude;
146 mini_clear_abort_threshold (void)
148 MonoJitTlsData *jit_tls = mono_get_jit_tls ();
149 jit_tls->abort_exc_stack_threshold = NULL;
153 mini_set_abort_threshold (MonoContext *ctx)
155 gpointer sp = MONO_CONTEXT_GET_SP (ctx);
156 MonoJitTlsData *jit_tls = mono_get_jit_tls ();
157 // Only move it up, to avoid thrown/caught
158 // exceptions lower in the stack from triggering
160 gboolean above_threshold = mini_abort_threshold_offset (jit_tls->abort_exc_stack_threshold, sp) >= 0;
161 if (!jit_tls->abort_exc_stack_threshold || above_threshold) {
162 jit_tls->abort_exc_stack_threshold = sp;
166 // Note: In the case that the frame is above where the thread abort
167 // was set we bump the threshold so that functions called from the new,
168 // higher threshold don't trigger the thread abort exception
169 static inline gboolean
170 mini_above_abort_threshold (void)
172 gpointer sp = mono_thread_get_managed_sp ();
173 MonoJitTlsData *jit_tls = (MonoJitTlsData*) mono_tls_get_jit_tls ();
178 gboolean above_threshold = mini_abort_threshold_offset (jit_tls->abort_exc_stack_threshold, sp) >= 0;
181 jit_tls->abort_exc_stack_threshold = sp;
183 return above_threshold;
187 mono_get_seq_point_for_native_offset (MonoDomain *domain, MonoMethod *method, gint32 native_offset)
190 if (mono_find_prev_seq_point_for_native_offset (domain, method, native_offset, NULL, &sp))
196 mono_exceptions_init (void)
198 MonoRuntimeExceptionHandlingCallbacks cbs;
200 restore_context_func = mono_aot_get_trampoline ("restore_context");
201 call_filter_func = mono_aot_get_trampoline ("call_filter");
202 throw_exception_func = mono_aot_get_trampoline ("throw_exception");
203 rethrow_exception_func = mono_aot_get_trampoline ("rethrow_exception");
207 restore_context_func = mono_arch_get_restore_context (&info, FALSE);
208 mono_tramp_info_register (info, NULL);
209 call_filter_func = mono_arch_get_call_filter (&info, FALSE);
210 mono_tramp_info_register (info, NULL);
211 throw_exception_func = mono_arch_get_throw_exception (&info, FALSE);
212 mono_tramp_info_register (info, NULL);
213 rethrow_exception_func = mono_arch_get_rethrow_exception (&info, FALSE);
214 mono_tramp_info_register (info, NULL);
216 #ifdef MONO_ARCH_HAVE_RESTORE_STACK_SUPPORT
217 if (!mono_llvm_only) {
218 try_more_restore_tramp = mono_create_specific_trampoline (try_more_restore, MONO_TRAMPOLINE_RESTORE_STACK_PROT, mono_domain_get (), NULL);
219 restore_stack_protection_tramp = mono_create_specific_trampoline (restore_stack_protection, MONO_TRAMPOLINE_RESTORE_STACK_PROT, mono_domain_get (), NULL);
223 #ifdef MONO_ARCH_HAVE_EXCEPTIONS_INIT
224 mono_arch_exceptions_init ();
226 #ifdef ENABLE_INTERPRETER
227 if (mono_use_interpreter)
228 cbs.mono_walk_stack_with_ctx = interp_walk_stack_with_ctx;
231 cbs.mono_walk_stack_with_ctx = mono_runtime_walk_stack_with_ctx;
233 cbs.mono_walk_stack_with_state = mono_walk_stack_with_state;
236 cbs.mono_raise_exception = mono_llvm_raise_exception;
238 cbs.mono_raise_exception = (void (*)(MonoException *))mono_get_throw_exception ();
239 cbs.mono_raise_exception_with_ctx = mono_raise_exception_with_ctx;
240 cbs.mono_exception_walk_trace = mono_exception_walk_trace;
241 cbs.mono_install_handler_block_guard = mono_install_handler_block_guard;
242 cbs.mono_current_thread_has_handle_block_guard = mono_current_thread_has_handle_block_guard;
243 cbs.mono_clear_abort_threshold = mini_clear_abort_threshold;
244 cbs.mono_above_abort_threshold = mini_above_abort_threshold;
245 mono_install_eh_callbacks (&cbs);
246 mono_install_get_seq_point (mono_get_seq_point_for_native_offset);
250 mono_get_throw_exception (void)
252 g_assert (throw_exception_func);
253 return throw_exception_func;
257 mono_get_rethrow_exception (void)
259 g_assert (rethrow_exception_func);
260 return rethrow_exception_func;
264 mono_get_call_filter (void)
266 g_assert (call_filter_func);
267 return call_filter_func;
271 mono_get_restore_context (void)
273 g_assert (restore_context_func);
274 return restore_context_func;
278 mono_get_throw_corlib_exception (void)
280 gpointer code = NULL;
283 /* This depends on corlib classes so cannot be inited in mono_exceptions_init () */
284 if (throw_corlib_exception_func)
285 return throw_corlib_exception_func;
288 code = mono_aot_get_trampoline ("throw_corlib_exception");
290 code = mono_arch_get_throw_corlib_exception (&info, FALSE);
291 mono_tramp_info_register (info, NULL);
294 mono_memory_barrier ();
296 throw_corlib_exception_func = code;
298 return throw_corlib_exception_func;
302 * mono_get_throw_exception_addr:
304 * Return an address which stores the result of
305 * mono_get_throw_exception.
308 mono_get_throw_exception_addr (void)
310 return &throw_exception_func;
314 is_address_protected (MonoJitInfo *ji, MonoJitExceptionInfo *ei, gpointer ip)
316 MonoTryBlockHoleTableJitInfo *table;
321 if (ei->try_start > ip || ip >= ei->try_end)
324 if (!ji->has_try_block_holes)
327 table = mono_jit_info_get_try_block_hole_table_info (ji);
328 offset = (guint32)((char*)ip - (char*)ji->code_start);
329 clause = (guint16)(ei - ji->clauses);
330 g_assert (clause < ji->num_clauses);
332 for (i = 0; i < table->num_holes; ++i) {
333 MonoTryBlockHoleJitInfo *hole = &table->holes [i];
334 if (hole->clause == clause && hole->offset <= offset && hole->offset + hole->length > offset)
340 #ifdef MONO_ARCH_HAVE_UNWIND_BACKTRACE
343 static gboolean show_native_addresses = TRUE;
345 static gboolean show_native_addresses = FALSE;
348 static _Unwind_Reason_Code
349 build_stack_trace (struct _Unwind_Context *frame_ctx, void *state)
351 MonoDomain *domain = mono_domain_get ();
352 uintptr_t ip = _Unwind_GetIP (frame_ctx);
354 if (show_native_addresses || mono_jit_info_table_find (domain, (char*)ip)) {
355 GList **trace_ips = (GList **)state;
356 *trace_ips = g_list_prepend (*trace_ips, (gpointer)ip);
359 return _URC_NO_REASON;
363 get_unwind_backtrace (void)
367 _Unwind_Backtrace (build_stack_trace, &ips);
369 return g_slist_reverse (ips);
375 get_unwind_backtrace (void)
385 * Translate between the mono_arch_unwind_frame function and the old API.
388 find_jit_info (MonoDomain *domain, MonoJitTlsData *jit_tls, MonoJitInfo *res, MonoJitInfo *prev_ji, MonoContext *ctx,
389 MonoContext *new_ctx, MonoLMF **lmf, gboolean *managed)
391 StackFrameInfo frame;
394 gpointer ip = MONO_CONTEXT_GET_IP (ctx);
396 /* Avoid costly table lookup during stack overflow */
397 if (prev_ji && (ip > prev_ji->code_start && ((guint8*)ip < ((guint8*)prev_ji->code_start) + prev_ji->code_size)))
400 ji = mini_jit_info_table_find (domain, (char *)ip, NULL);
405 err = mono_arch_unwind_frame (domain, jit_tls, ji, ctx, new_ctx, lmf, NULL, &frame);
407 return (MonoJitInfo *)-1;
409 if (*lmf && ((*lmf) != jit_tls->first_lmf) && ((gpointer)MONO_CONTEXT_GET_SP (new_ctx) >= (gpointer)(*lmf))) {
411 * Remove any unused lmf.
412 * Mask out the lower bits which might be used to hold additional information.
414 *lmf = (MonoLMF *)(((gsize)(*lmf)->previous_lmf) & ~(SIZEOF_VOID_P -1));
417 /* Convert between the new and the old APIs */
418 switch (frame.type) {
419 case FRAME_TYPE_MANAGED:
423 case FRAME_TYPE_TRAMPOLINE:
425 case FRAME_TYPE_MANAGED_TO_NATIVE:
429 memset (res, 0, sizeof (MonoJitInfo));
430 res->d.method = frame.method;
433 case FRAME_TYPE_DEBUGGER_INVOKE: {
437 * The normal exception handling code can't handle this frame, so just
440 ji = find_jit_info (domain, jit_tls, res, NULL, new_ctx, &tmp_ctx, lmf, managed);
441 memcpy (new_ctx, &tmp_ctx, sizeof (MonoContext));
445 g_assert_not_reached ();
450 /* mono_find_jit_info:
452 * This function is used to gather information from @ctx. It return the
453 * MonoJitInfo of the corresponding function, unwinds one stack frame and
454 * stores the resulting context into @new_ctx. It also stores a string
455 * describing the stack location into @trace (if not NULL), and modifies
456 * the @lmf if necessary. @native_offset return the IP offset from the
457 * start of the function or -1 if that info is not available.
460 mono_find_jit_info (MonoDomain *domain, MonoJitTlsData *jit_tls, MonoJitInfo *res, MonoJitInfo *prev_ji, MonoContext *ctx,
461 MonoContext *new_ctx, char **trace, MonoLMF **lmf, int *native_offset,
465 gpointer ip = MONO_CONTEXT_GET_IP (ctx);
467 MonoMethod *method = NULL;
478 ji = find_jit_info (domain, jit_tls, res, prev_ji, ctx, new_ctx, lmf, &managed2);
480 if (ji == (gpointer)-1)
483 if (ji && !ji->is_trampoline)
484 method = jinfo_get_method (ji);
486 if (managed2 || (method && method->wrapper_type)) {
487 const char *real_ip, *start;
490 start = (const char *)ji->code_start;
492 /* ctx->ip points into native code */
493 real_ip = (const char*)MONO_CONTEXT_GET_IP (new_ctx);
495 real_ip = (const char*)ip;
497 if ((real_ip >= start) && (real_ip <= start + ji->code_size))
498 offset = real_ip - start;
503 *native_offset = offset;
506 if (!method->wrapper_type || method->wrapper_type == MONO_WRAPPER_DYNAMIC_METHOD)
510 *trace = mono_debug_print_stack_frame (method, offset, domain);
513 char *fname = mono_method_full_name (jinfo_get_method (res), TRUE);
514 *trace = g_strdup_printf ("in (unmanaged) %s", fname);
523 * mono_find_jit_info_ext:
525 * A version of mono_find_jit_info which returns all data in the StackFrameInfo
527 * A note about frames of type FRAME_TYPE_MANAGED_TO_NATIVE:
528 * - These frames are used to mark managed-to-native transitions, so CTX will refer to native
529 * code, and new_ctx will refer to the last managed frame. The caller should unwind once more
530 * to obtain the last managed frame.
531 * If SAVE_LOCATIONS is not NULL, it should point to an array of size MONO_MAX_IREGS.
532 * On return, it will be filled with the locations where callee saved registers are saved
533 * by the current frame. This is returned outside of StackFrameInfo because it can be
534 * quite large on some platforms.
535 * If ASYNC true, this function will be async safe, but some fields of frame and frame->ji will
539 mono_find_jit_info_ext (MonoDomain *domain, MonoJitTlsData *jit_tls,
540 MonoJitInfo *prev_ji, MonoContext *ctx,
541 MonoContext *new_ctx, char **trace, MonoLMF **lmf,
542 mgreg_t **save_locations,
543 StackFrameInfo *frame)
546 gpointer ip = MONO_CONTEXT_GET_IP (ctx);
548 MonoDomain *target_domain = domain;
549 MonoMethod *method = NULL;
550 gboolean async = mono_thread_info_is_async_context ();
555 /* Avoid costly table lookup during stack overflow */
556 if (prev_ji && (ip > prev_ji->code_start && ((guint8*)ip < ((guint8*)prev_ji->code_start) + prev_ji->code_size)))
559 ji = mini_jit_info_table_find (domain, (char *)ip, &target_domain);
562 target_domain = domain;
565 memset (save_locations, 0, MONO_MAX_IREGS * sizeof (mgreg_t*));
567 err = mono_arch_unwind_frame (target_domain, jit_tls, ji, ctx, new_ctx, lmf, save_locations, frame);
571 if (frame->type != FRAME_TYPE_INTERP_TO_MANAGED && *lmf && ((*lmf) != jit_tls->first_lmf) && ((gpointer)MONO_CONTEXT_GET_SP (new_ctx) >= (gpointer)(*lmf))) {
573 * Remove any unused lmf.
574 * Mask out the lower bits which might be used to hold additional information.
576 *lmf = (MonoLMF *)(((gsize)(*lmf)->previous_lmf) & ~(SIZEOF_VOID_P -1));
579 if (frame->ji && !frame->ji->is_trampoline && !frame->ji->async)
580 method = jinfo_get_method (frame->ji);
582 if (frame->type == FRAME_TYPE_MANAGED && method) {
583 if (!method->wrapper_type || method->wrapper_type == MONO_WRAPPER_DYNAMIC_METHOD)
584 frame->managed = TRUE;
587 if (frame->type == FRAME_TYPE_MANAGED_TO_NATIVE) {
589 * This type of frame is just a marker, the caller should unwind once more to get the
590 * last managed frame.
593 frame->method = NULL;
596 frame->native_offset = -1;
597 frame->domain = target_domain;
598 frame->async_context = async;
602 if (frame->type == FRAME_TYPE_MANAGED)
603 frame->method = method;
605 if (ji && (frame->managed || (method && method->wrapper_type))) {
606 const char *real_ip, *start;
608 start = (const char *)ji->code_start;
609 if (frame->type == FRAME_TYPE_MANAGED)
610 real_ip = (const char*)ip;
612 /* ctx->ip points into native code */
613 real_ip = (const char*)MONO_CONTEXT_GET_IP (new_ctx);
615 if ((real_ip >= start) && (real_ip <= start + ji->code_size))
616 frame->native_offset = real_ip - start;
618 frame->native_offset = -1;
622 *trace = mono_debug_print_stack_frame (method, frame->native_offset, domain);
624 if (trace && frame->method) {
625 char *fname = mono_method_full_name (frame->method, TRUE);
626 *trace = g_strdup_printf ("in (unmanaged) %s", fname);
636 MonoInterpStackIter interp_iter;
640 unwinder_init (Unwinder *unwinder)
642 memset (unwinder, 0, sizeof (Unwinder));
645 #if defined(GNUC) && defined(TARGET_ARM64)
646 /* gcc 4.9.2 seems to miscompile this on arm64 */
647 static __attribute__((optimize("O0"))) gboolean
651 unwinder_unwind_frame (Unwinder *unwinder,
652 MonoDomain *domain, MonoJitTlsData *jit_tls,
653 MonoJitInfo *prev_ji, MonoContext *ctx,
654 MonoContext *new_ctx, char **trace, MonoLMF **lmf,
655 mgreg_t **save_locations,
656 StackFrameInfo *frame)
658 if (unwinder->in_interp) {
659 unwinder->in_interp = mono_interp_frame_iter_next (&unwinder->interp_iter, frame);
660 if (!unwinder->in_interp) {
661 return unwinder_unwind_frame (unwinder, domain, jit_tls, prev_ji, ctx, new_ctx, trace, lmf, save_locations, frame);
665 gboolean res = mono_find_jit_info_ext (domain, jit_tls, prev_ji, ctx, new_ctx, trace, lmf,
666 save_locations, frame);
669 if (frame->type == FRAME_TYPE_INTERP_TO_MANAGED) {
670 unwinder->in_interp = TRUE;
671 mono_interp_frame_iter_init (&unwinder->interp_iter, frame->interp_exit_data);
678 * This function is async-safe.
681 get_generic_info_from_stack_frame (MonoJitInfo *ji, MonoContext *ctx)
683 MonoGenericJitInfo *gi;
687 if (!ji->has_generic_jit_info)
689 gi = mono_jit_info_get_generic_jit_info (ji);
695 * Search location list if available, it contains the precise location of the
696 * argument for every pc offset, even if the method was interrupted while it was in
700 int offset = (mgreg_t)MONO_CONTEXT_GET_IP (ctx) - (mgreg_t)ji->code_start;
703 for (i = 0; i < gi->nlocs; ++i) {
704 MonoDwarfLocListEntry *entry = &gi->locations [i];
706 if (offset >= entry->from && (offset < entry->to || entry->to == 0)) {
708 info = (gpointer)mono_arch_context_get_int_reg (ctx, entry->reg);
710 info = *(gpointer*)(gpointer)((char*)mono_arch_context_get_int_reg (ctx, entry->reg) + entry->offset);
714 g_assert (i < gi->nlocs);
717 info = (gpointer)mono_arch_context_get_int_reg (ctx, gi->this_reg);
719 info = *(gpointer*)(gpointer)((char*)mono_arch_context_get_int_reg (ctx, gi->this_reg) +
723 method = jinfo_get_method (ji);
724 if (mono_method_get_context (method)->method_inst) {
725 /* A MonoMethodRuntimeGenericContext* */
727 } else if ((method->flags & METHOD_ATTRIBUTE_STATIC) || method->klass->valuetype) {
731 /* Avoid returning a managed object */
732 MonoObject *this_obj = (MonoObject *)info;
734 return this_obj->vtable;
739 * generic_info is either a MonoMethodRuntimeGenericContext or a MonoVTable.
741 static MonoGenericContext
742 get_generic_context_from_stack_frame (MonoJitInfo *ji, gpointer generic_info)
744 MonoGenericContext context = { NULL, NULL };
745 MonoClass *klass, *method_container_class;
748 g_assert (generic_info);
750 method = jinfo_get_method (ji);
751 g_assert (method->is_inflated);
752 if (mono_method_get_context (method)->method_inst) {
753 MonoMethodRuntimeGenericContext *mrgctx = (MonoMethodRuntimeGenericContext *)generic_info;
755 klass = mrgctx->class_vtable->klass;
756 context.method_inst = mrgctx->method_inst;
757 g_assert (context.method_inst);
759 MonoVTable *vtable = (MonoVTable *)generic_info;
761 klass = vtable->klass;
764 //g_assert (!mono_class_is_gtd (method->klass));
765 if (mono_class_is_ginst (method->klass))
766 method_container_class = mono_class_get_generic_class (method->klass)->container_class;
768 method_container_class = method->klass;
770 /* class might refer to a subclass of method's class */
771 while (!(klass == method->klass || (mono_class_is_ginst (klass) && mono_class_get_generic_class (klass)->container_class == method_container_class))) {
772 klass = klass->parent;
776 if (mono_class_is_ginst (klass) || mono_class_is_gtd (klass))
777 context.class_inst = mini_class_get_context (klass)->class_inst;
779 if (mono_class_is_ginst (klass))
780 g_assert (mono_class_has_parent_and_ignore_generics (mono_class_get_generic_class (klass)->container_class, method_container_class));
782 g_assert (mono_class_has_parent_and_ignore_generics (klass, method_container_class));
788 get_method_from_stack_frame (MonoJitInfo *ji, gpointer generic_info)
791 MonoGenericContext context;
794 if (!ji->has_generic_jit_info || !mono_jit_info_get_generic_jit_info (ji)->has_this)
795 return jinfo_get_method (ji);
796 context = get_generic_context_from_stack_frame (ji, generic_info);
798 method = jinfo_get_method (ji);
799 method = mono_method_get_declaring_generic_method (method);
800 method = mono_class_inflate_generic_method_checked (method, &context, &error);
801 g_assert (mono_error_ok (&error)); /* FIXME don't swallow the error */
807 * mono_exception_walk_native_trace:
808 * \param ex The exception object whose frames should be walked
809 * \param func callback to call for each stack frame
810 * \param user_data data passed to the callback
811 * This function walks the stacktrace of an exception. For
812 * each frame the callback function is called with the relevant info.
813 * The walk ends when no more stack frames are found or when the callback
814 * returns a TRUE value.
818 mono_exception_walk_trace (MonoException *ex, MonoExceptionFrameWalk func, gpointer user_data)
820 MONO_REQ_GC_UNSAFE_MODE;
822 MonoDomain *domain = mono_domain_get ();
823 MonoArray *ta = ex->trace_ips;
829 len = mono_array_length (ta) >> 1;
830 for (i = 0; i < len; i++) {
831 gpointer ip = mono_array_get (ta, gpointer, i * 2 + 0);
832 gpointer generic_info = mono_array_get (ta, gpointer, i * 2 + 1);
833 MonoJitInfo *ji = mono_jit_info_table_find (domain, (char *)ip);
836 if (func (NULL, ip, 0, FALSE, user_data))
839 MonoMethod *method = get_method_from_stack_frame (ji, generic_info);
840 if (func (method, ji->code_start, (char *) ip - (char *) ji->code_start, TRUE, user_data))
849 ves_icall_get_trace (MonoException *exc, gint32 skip, MonoBoolean need_file_info)
852 MonoDomain *domain = mono_domain_get ();
854 MonoArray *ta = exc->trace_ips;
855 MonoDebugSourceLocation *location;
859 /* Exception is not thrown yet */
860 res = mono_array_new_checked (domain, mono_defaults.stack_frame_class, 0, &error);
861 mono_error_set_pending_exception (&error);
865 len = mono_array_length (ta) >> 1;
867 res = mono_array_new_checked (domain, mono_defaults.stack_frame_class, len > skip ? len - skip : 0, &error);
868 if (mono_error_set_pending_exception (&error))
871 for (i = skip; i < len; i++) {
873 MonoStackFrame *sf = (MonoStackFrame *)mono_object_new_checked (domain, mono_defaults.stack_frame_class, &error);
874 if (!mono_error_ok (&error)) {
875 mono_error_set_pending_exception (&error);
878 gpointer ip = mono_array_get (ta, gpointer, i * 2 + 0);
879 gpointer generic_info = mono_array_get (ta, gpointer, i * 2 + 1);
882 ji = mono_jit_info_table_find (domain, (char *)ip);
884 /* Unmanaged frame */
885 mono_array_setref (res, i, sf);
889 g_assert (ji != NULL);
892 /* Can't resolve actual method */
893 method = jinfo_get_method (ji);
895 method = get_method_from_stack_frame (ji, generic_info);
896 if (jinfo_get_method (ji)->wrapper_type) {
900 s = mono_method_get_name_full (method, TRUE, FALSE, MONO_TYPE_NAME_FORMAT_REFLECTION);
901 MONO_OBJECT_SETREF (sf, internal_method_name, mono_string_new (domain, s));
905 MonoReflectionMethod *rm = mono_method_get_object_checked (domain, method, NULL, &error);
906 if (!mono_error_ok (&error)) {
907 mono_error_set_pending_exception (&error);
910 MONO_OBJECT_SETREF (sf, method, rm);
913 sf->method_index = ji->from_aot ? mono_aot_find_method_index (method) : 0xffffff;
914 sf->method_address = (gsize) ji->code_start;
915 sf->native_offset = (char *)ip - (char *)ji->code_start;
918 * mono_debug_lookup_source_location() returns both the file / line number information
919 * and the IL offset. Note that computing the IL offset is already an expensive
920 * operation, so we shouldn't call this method twice.
922 location = mono_debug_lookup_source_location (jinfo_get_method (ji), sf->native_offset, domain);
924 sf->il_offset = location->il_offset;
927 if (mono_find_prev_seq_point_for_native_offset (domain, jinfo_get_method (ji), sf->native_offset, NULL, &sp))
928 sf->il_offset = sp.il_offset;
933 if (need_file_info) {
934 if (location && location->source_file) {
935 MONO_OBJECT_SETREF (sf, filename, mono_string_new (domain, location->source_file));
936 sf->line = location->row;
937 sf->column = location->column;
939 sf->line = sf->column = 0;
944 mono_debug_free_source_location (location);
945 mono_array_setref (res, i, sf);
952 mono_runtime_walk_stack_with_ctx (MonoJitStackWalk func, MonoContext *start_ctx, MonoUnwindOptions unwind_options, void *user_data)
955 MonoJitTlsData *jit_tls = (MonoJitTlsData *)mono_tls_get_jit_tls ();
956 if (jit_tls && jit_tls->orig_ex_ctx_set)
957 start_ctx = &jit_tls->orig_ex_ctx;
959 mono_walk_stack_with_ctx (func, start_ctx, unwind_options, user_data);
962 * mono_walk_stack_with_ctx:
963 * Unwind the current thread starting at \p start_ctx.
964 * If \p start_ctx is null, we capture the current context.
967 mono_walk_stack_with_ctx (MonoJitStackWalk func, MonoContext *start_ctx, MonoUnwindOptions unwind_options, void *user_data)
969 MonoContext extra_ctx;
970 MonoThreadInfo *thread = mono_thread_info_current_unchecked ();
971 MONO_ARCH_CONTEXT_DEF
973 if (!thread || !thread->jit_data)
977 mono_arch_flush_register_windows ();
979 #ifdef MONO_INIT_CONTEXT_FROM_CURRENT
980 MONO_INIT_CONTEXT_FROM_CURRENT (&extra_ctx);
982 MONO_INIT_CONTEXT_FROM_FUNC (&extra_ctx, mono_walk_stack_with_ctx);
984 start_ctx = &extra_ctx;
987 mono_walk_stack_full (func, start_ctx, mono_domain_get (), (MonoJitTlsData *)thread->jit_data, mono_get_lmf (), unwind_options, user_data);
991 * mono_walk_stack_with_state:
992 * Unwind a thread described by \p state.
994 * State must be valid (state->valid == TRUE).
996 * If you are using this function to unwind another thread, make sure it is suspended.
998 * If \p state is null, we capture the current context.
1001 mono_walk_stack_with_state (MonoJitStackWalk func, MonoThreadUnwindState *state, MonoUnwindOptions unwind_options, void *user_data)
1003 MonoThreadUnwindState extra_state;
1005 g_assert (!mono_thread_info_is_async_context ());
1006 if (!mono_thread_state_init_from_current (&extra_state))
1008 state = &extra_state;
1011 g_assert (state->valid);
1013 if (!state->unwind_data [MONO_UNWIND_DATA_DOMAIN])
1017 mono_walk_stack_full (func,
1019 (MonoDomain *)state->unwind_data [MONO_UNWIND_DATA_DOMAIN],
1020 (MonoJitTlsData *)state->unwind_data [MONO_UNWIND_DATA_JIT_TLS],
1021 (MonoLMF *)state->unwind_data [MONO_UNWIND_DATA_LMF],
1022 unwind_options, user_data);
1026 mono_walk_stack (MonoJitStackWalk func, MonoUnwindOptions options, void *user_data)
1028 MonoThreadUnwindState state;
1029 if (!mono_thread_state_init_from_current (&state))
1031 mono_walk_stack_with_state (func, &state, options, user_data);
1035 * mono_walk_stack_full:
1036 * \param func callback to call for each stack frame
1037 * \param domain starting appdomain, can be NULL to use the current domain
1038 * \param unwind_options what extra information the unwinder should gather
1039 * \param start_ctx starting state of the stack walk, can be NULL.
1040 * \param thread the thread whose stack to walk, can be NULL to use the current thread
1041 * \param lmf the LMF of \p thread, can be NULL to use the LMF of the current thread
1042 * \param user_data data passed to the callback
1043 * This function walks the stack of a thread, starting from the state
1044 * represented by \p start_ctx. For each frame the callback
1045 * function is called with the relevant info. The walk ends when no more
1046 * managed stack frames are found or when the callback returns a TRUE value.
1049 mono_walk_stack_full (MonoJitStackWalk func, MonoContext *start_ctx, MonoDomain *domain, MonoJitTlsData *jit_tls, MonoLMF *lmf, MonoUnwindOptions unwind_options, gpointer user_data)
1052 MonoContext ctx, new_ctx;
1053 StackFrameInfo frame;
1055 mgreg_t *reg_locations [MONO_MAX_IREGS];
1056 mgreg_t *new_reg_locations [MONO_MAX_IREGS];
1057 gboolean get_reg_locations = unwind_options & MONO_UNWIND_REG_LOCATIONS;
1058 gboolean async = mono_thread_info_is_async_context ();
1060 if (mono_llvm_only) {
1066 ips = get_unwind_backtrace ();
1067 for (l = ips; l; l = l->next) {
1068 guint8 *ip = (guint8*)l->data;
1069 memset (&frame, 0, sizeof (StackFrameInfo));
1070 frame.ji = mini_jit_info_table_find (domain, (char*)ip, &frame.domain);
1071 if (!frame.ji || frame.ji->is_trampoline)
1073 frame.type = FRAME_TYPE_MANAGED;
1074 frame.method = jinfo_get_method (frame.ji);
1075 // FIXME: Cannot lookup the actual method
1076 frame.actual_method = frame.method;
1077 if (frame.type == FRAME_TYPE_MANAGED) {
1078 if (!frame.method->wrapper_type || frame.method->wrapper_type == MONO_WRAPPER_DYNAMIC_METHOD)
1079 frame.managed = TRUE;
1081 frame.native_offset = ip - (guint8*)frame.ji->code_start;
1082 frame.il_offset = -1;
1084 if (func (&frame, NULL, user_data))
1091 g_assert (start_ctx);
1094 /*The LMF will be null if the target have no managed frames.*/
1095 /* g_assert (lmf); */
1098 g_assert (unwind_options == MONO_UNWIND_NONE);
1100 memcpy (&ctx, start_ctx, sizeof (MonoContext));
1101 memset (reg_locations, 0, sizeof (reg_locations));
1103 while (MONO_CONTEXT_GET_SP (&ctx) < jit_tls->end_of_stack) {
1105 res = mono_find_jit_info_ext (domain, jit_tls, NULL, &ctx, &new_ctx, NULL, &lmf, get_reg_locations ? new_reg_locations : NULL, &frame);
1109 if ((unwind_options & MONO_UNWIND_LOOKUP_IL_OFFSET) && frame.ji && !frame.ji->is_trampoline) {
1110 MonoDebugSourceLocation *source;
1112 source = mono_debug_lookup_source_location (jinfo_get_method (frame.ji), frame.native_offset, domain);
1114 il_offset = source->il_offset;
1117 if (mono_find_prev_seq_point_for_native_offset (domain, jinfo_get_method (frame.ji), frame.native_offset, NULL, &sp))
1118 il_offset = sp.il_offset;
1122 mono_debug_free_source_location (source);
1126 frame.il_offset = il_offset;
1128 if ((unwind_options & MONO_UNWIND_LOOKUP_ACTUAL_METHOD) && frame.ji && !frame.ji->is_trampoline) {
1129 frame.actual_method = get_method_from_stack_frame (frame.ji, get_generic_info_from_stack_frame (frame.ji, &ctx));
1131 frame.actual_method = frame.method;
1134 if (get_reg_locations)
1135 frame.reg_locations = reg_locations;
1137 if (func (&frame, &ctx, user_data))
1140 if (get_reg_locations) {
1141 for (i = 0; i < MONO_MAX_IREGS; ++i)
1142 if (new_reg_locations [i])
1143 reg_locations [i] = new_reg_locations [i];
1151 ves_icall_get_frame_info (gint32 skip, MonoBoolean need_file_info,
1152 MonoReflectionMethod **method,
1153 gint32 *iloffset, gint32 *native_offset,
1154 MonoString **file, gint32 *line, gint32 *column)
1157 MonoDomain *domain = mono_domain_get ();
1158 MonoJitTlsData *jit_tls = (MonoJitTlsData *)mono_tls_get_jit_tls ();
1159 MonoLMF *lmf = mono_get_lmf ();
1160 MonoJitInfo *ji = NULL;
1161 MonoContext ctx, new_ctx;
1162 MonoDebugSourceLocation *location;
1163 MonoMethod *jmethod = NULL, *actual_method;
1164 StackFrameInfo frame;
1169 MONO_ARCH_CONTEXT_DEF;
1171 if (mono_llvm_only) {
1173 MonoDomain *frame_domain;
1174 guint8 *frame_ip = NULL;
1176 /* FIXME: Generalize this code with an interface which returns an array of StackFrame structures */
1178 ips = get_unwind_backtrace ();
1179 for (l = ips; l && skip >= 0; l = l->next) {
1180 guint8 *ip = (guint8*)l->data;
1184 ji = mini_jit_info_table_find (mono_domain_get (), (char*)ip, &frame_domain);
1185 if (!ji || ji->is_trampoline)
1188 /* The skip count passed by the caller depends on us not filtering out MANAGED_TO_NATIVE */
1189 jmethod = jinfo_get_method (ji);
1190 if (jmethod->wrapper_type != MONO_WRAPPER_NONE && jmethod->wrapper_type != MONO_WRAPPER_DYNAMIC_METHOD && jmethod->wrapper_type != MONO_WRAPPER_MANAGED_TO_NATIVE)
1197 /* No way to resolve generic instances */
1198 actual_method = jmethod;
1199 *native_offset = frame_ip - (guint8*)ji->code_start;
1201 mono_arch_flush_register_windows ();
1203 #ifdef MONO_INIT_CONTEXT_FROM_CURRENT
1204 MONO_INIT_CONTEXT_FROM_CURRENT (&ctx);
1206 MONO_INIT_CONTEXT_FROM_FUNC (&ctx, ves_icall_get_frame_info);
1209 unwinder_init (&unwinder);
1214 res = unwinder_unwind_frame (&unwinder, domain, jit_tls, NULL, &ctx, &new_ctx, NULL, &lmf, NULL, &frame);
1217 switch (frame.type) {
1218 case FRAME_TYPE_MANAGED_TO_NATIVE:
1219 case FRAME_TYPE_DEBUGGER_INVOKE:
1220 case FRAME_TYPE_TRAMPOLINE:
1221 case FRAME_TYPE_INTERP_TO_MANAGED:
1223 case FRAME_TYPE_INTERP:
1228 *native_offset = frame.native_offset;
1230 /* The skip count passed by the caller depends on us not filtering out MANAGED_TO_NATIVE */
1231 jmethod = jinfo_get_method (ji);
1232 if (jmethod->wrapper_type != MONO_WRAPPER_NONE && jmethod->wrapper_type != MONO_WRAPPER_DYNAMIC_METHOD && jmethod->wrapper_type != MONO_WRAPPER_MANAGED_TO_NATIVE)
1237 } while (skip >= 0);
1239 if (frame.type == FRAME_TYPE_INTERP) {
1240 jmethod = frame.method;
1241 actual_method = frame.actual_method;
1242 *native_offset = frame.native_offset;
1244 actual_method = get_method_from_stack_frame (ji, get_generic_info_from_stack_frame (ji, &ctx));
1248 MonoReflectionMethod *rm = mono_method_get_object_checked (domain, actual_method, NULL, &error);
1249 if (!mono_error_ok (&error)) {
1250 mono_error_set_pending_exception (&error);
1253 mono_gc_wbarrier_generic_store (method, (MonoObject*) rm);
1255 if (il_offset != -1) {
1256 location = mono_debug_lookup_source_location_by_il (jmethod, il_offset, domain);
1258 location = mono_debug_lookup_source_location (jmethod, *native_offset, domain);
1261 *iloffset = location->il_offset;
1265 if (need_file_info) {
1267 mono_gc_wbarrier_generic_store (file, (MonoObject*) mono_string_new (domain, location->source_file));
1268 *line = location->row;
1269 *column = location->column;
1272 *line = *column = 0;
1276 mono_debug_free_source_location (location);
1282 get_exception_catch_class (MonoJitExceptionInfo *ei, MonoJitInfo *ji, MonoContext *ctx)
1285 MonoClass *catch_class = ei->data.catch_class;
1286 MonoType *inflated_type;
1287 MonoGenericContext context;
1289 /*MonoJitExceptionInfo::data is an union used by filter and finally clauses too.*/
1290 if (!catch_class || ei->flags != MONO_EXCEPTION_CLAUSE_NONE)
1293 if (!ji->has_generic_jit_info || !mono_jit_info_get_generic_jit_info (ji)->has_this)
1295 context = get_generic_context_from_stack_frame (ji, get_generic_info_from_stack_frame (ji, ctx));
1297 /* FIXME: we shouldn't inflate but instead put the
1298 type in the rgctx and fetch it from there. It
1299 might be a good idea to do this lazily, i.e. only
1300 when the exception is actually thrown, so as not to
1301 waste space for exception clauses which might never
1303 inflated_type = mono_class_inflate_generic_type_checked (&catch_class->byval_arg, &context, &error);
1304 mono_error_assert_ok (&error); /* FIXME don't swallow the error */
1306 catch_class = mono_class_from_mono_type (inflated_type);
1307 mono_metadata_free_type (inflated_type);
1313 * mini_jit_info_table_find_ext:
1315 * Same as mono_jit_info_table_find, but search all the domains of the current thread
1316 * if ADDR is not found in DOMAIN. The domain where the method was found is stored into
1317 * OUT_DOMAIN if it is not NULL.
1320 mini_jit_info_table_find_ext (MonoDomain *domain, char *addr, gboolean allow_trampolines, MonoDomain **out_domain)
1323 MonoInternalThread *t = mono_thread_internal_current ();
1329 ji = mono_jit_info_table_find_internal (domain, addr, TRUE, allow_trampolines);
1332 *out_domain = domain;
1336 /* maybe it is shared code, so we also search in the root domain */
1337 if (domain != mono_get_root_domain ()) {
1338 ji = mono_jit_info_table_find_internal (mono_get_root_domain (), addr, TRUE, allow_trampolines);
1341 *out_domain = mono_get_root_domain ();
1349 refs = (gpointer *)((t->appdomain_refs) ? *(gpointer *) t->appdomain_refs : NULL);
1350 for (; refs && *refs; refs++) {
1351 if (*refs != domain && *refs != mono_get_root_domain ()) {
1352 ji = mono_jit_info_table_find_internal ((MonoDomain*) *refs, addr, TRUE, allow_trampolines);
1355 *out_domain = (MonoDomain*) *refs;
1365 mini_jit_info_table_find (MonoDomain *domain, char *addr, MonoDomain **out_domain)
1367 return mini_jit_info_table_find_ext (domain, addr, FALSE, out_domain);
1370 /* Class lazy loading functions */
1371 static GENERATE_GET_CLASS_WITH_CACHE (runtime_compat_attr, "System.Runtime.CompilerServices", "RuntimeCompatibilityAttribute")
1374 * wrap_non_exception_throws:
1376 * Determine whenever M's assembly has a RuntimeCompatibilityAttribute with the
1377 * WrapNonExceptionThrows flag set.
1380 wrap_non_exception_throws (MonoMethod *m)
1383 MonoAssembly *ass = m->klass->image->assembly;
1384 MonoCustomAttrInfo* attrs;
1387 gboolean val = FALSE;
1390 if (ass->wrap_non_exception_throws_inited)
1391 return ass->wrap_non_exception_throws;
1393 klass = mono_class_get_runtime_compat_attr_class ();
1395 attrs = mono_custom_attrs_from_assembly_checked (ass, FALSE, &error);
1396 mono_error_cleanup (&error); /* FIXME don't swallow the error */
1398 for (i = 0; i < attrs->num_attrs; ++i) {
1399 MonoCustomAttrEntry *attr = &attrs->attrs [i];
1401 int num_named, named_type, name_len;
1404 if (!attr->ctor || attr->ctor->klass != klass)
1406 /* Decode the RuntimeCompatibilityAttribute. See reflection.c */
1407 p = (const char*)attr->data;
1408 g_assert (read16 (p) == 0x0001);
1410 num_named = read16 (p);
1416 /* data_type = *p; */
1419 if (named_type != 0x54)
1421 name_len = mono_metadata_decode_blob_size (p, &p);
1422 name = (char *)g_malloc (name_len + 1);
1423 memcpy (name, p, name_len);
1424 name [name_len] = 0;
1426 g_assert (!strcmp (name, "WrapNonExceptionThrows"));
1428 /* The value is a BOOLEAN */
1431 mono_custom_attrs_free (attrs);
1434 ass->wrap_non_exception_throws = val;
1435 mono_memory_barrier ();
1436 ass->wrap_non_exception_throws_inited = TRUE;
1441 #define MAX_UNMANAGED_BACKTRACE 128
1443 build_native_trace (MonoError *error)
1446 /* This puppy only makes sense on mobile, IOW, ARM. */
1447 #if defined (HAVE_BACKTRACE_SYMBOLS) && defined (TARGET_ARM)
1449 void *native_trace [MAX_UNMANAGED_BACKTRACE];
1452 size = backtrace (native_trace, MAX_UNMANAGED_BACKTRACE);
1458 res = mono_array_new_checked (mono_domain_get (), mono_defaults.int_class, size, error);
1459 return_val_if_nok (error, NULL);
1461 for (i = 0; i < size; i++)
1462 mono_array_set (res, gpointer, i, native_trace [i]);
1470 setup_stack_trace (MonoException *mono_ex, GSList *dynamic_methods, GList **trace_ips)
1473 *trace_ips = g_list_reverse (*trace_ips);
1475 MonoArray *ips_arr = mono_glist_to_array (*trace_ips, mono_defaults.int_class, &error);
1476 mono_error_assert_ok (&error);
1477 MONO_OBJECT_SETREF (mono_ex, trace_ips, ips_arr);
1478 MONO_OBJECT_SETREF (mono_ex, native_trace_ips, build_native_trace (&error));
1479 mono_error_assert_ok (&error);
1480 if (dynamic_methods) {
1481 /* These methods could go away anytime, so save a reference to them in the exception object */
1483 MonoMList *list = NULL;
1485 for (l = dynamic_methods; l; l = l->next) {
1487 MonoDomain *domain = mono_domain_get ();
1489 if (domain->method_to_dyn_method) {
1490 mono_domain_lock (domain);
1491 dis_link = (guint32)(size_t)g_hash_table_lookup (domain->method_to_dyn_method, l->data);
1492 mono_domain_unlock (domain);
1494 MonoObject *o = mono_gchandle_get_target (dis_link);
1496 list = mono_mlist_prepend_checked (list, o, &error);
1497 mono_error_assert_ok (&error);
1503 MONO_OBJECT_SETREF (mono_ex, dynamic_methods, list);
1506 g_list_free (*trace_ips);
1511 * mono_handle_exception_internal_first_pass:
1513 * The first pass of exception handling. Unwind the stack until a catch clause which can catch
1514 * OBJ is found. Run the index of the filter clause which caught the exception into
1515 * OUT_FILTER_IDX. Return TRUE if the exception is caught, FALSE otherwise.
1518 mono_handle_exception_internal_first_pass (MonoContext *ctx, MonoObject *obj, gint32 *out_filter_idx, MonoJitInfo **out_ji, MonoJitInfo **out_prev_ji, MonoObject *non_exception)
1521 MonoDomain *domain = mono_domain_get ();
1522 MonoJitInfo *ji = NULL;
1523 static int (*call_filter) (MonoContext *, gpointer) = NULL;
1524 MonoJitTlsData *jit_tls = (MonoJitTlsData *)mono_tls_get_jit_tls ();
1525 MonoLMF *lmf = mono_get_lmf ();
1526 GList *trace_ips = NULL;
1527 GSList *dynamic_methods = NULL;
1528 MonoException *mono_ex;
1529 gboolean stack_overflow = FALSE;
1530 MonoContext initial_ctx;
1532 int frame_count = 0;
1539 g_assert (ctx != NULL);
1541 if (obj == (MonoObject *)domain->stack_overflow_ex)
1542 stack_overflow = TRUE;
1544 mono_ex = (MonoException*)obj;
1545 MonoArray *initial_trace_ips = mono_ex->trace_ips;
1546 if (initial_trace_ips) {
1547 int len = mono_array_length (initial_trace_ips) >> 1;
1549 for (i = 0; i < (len - 1); i++) {
1550 gpointer ip = mono_array_get (initial_trace_ips, gpointer, i * 2 + 0);
1551 gpointer generic_info = mono_array_get (initial_trace_ips, gpointer, i * 2 + 1);
1552 trace_ips = g_list_prepend (trace_ips, ip);
1553 trace_ips = g_list_prepend (trace_ips, generic_info);
1557 if (!mono_object_isinst_checked (obj, mono_defaults.exception_class, &error)) {
1558 mono_error_assert_ok (&error);
1563 call_filter = (int (*) (MonoContext *, void *))mono_get_call_filter ();
1565 g_assert (jit_tls->end_of_stack);
1566 g_assert (jit_tls->abort_func);
1569 *out_filter_idx = -1;
1573 *out_prev_ji = NULL;
1577 unwinder_init (&unwinder);
1580 MonoContext new_ctx;
1582 int clause_index_start = 0;
1583 gboolean unwind_res = TRUE;
1585 StackFrameInfo frame;
1590 unwind_res = unwinder_unwind_frame (&unwinder, domain, jit_tls, NULL, ctx, &new_ctx, NULL, &lmf, NULL, &frame);
1592 setup_stack_trace (mono_ex, dynamic_methods, &trace_ips);
1593 g_slist_free (dynamic_methods);
1597 switch (frame.type) {
1598 case FRAME_TYPE_DEBUGGER_INVOKE:
1599 case FRAME_TYPE_MANAGED_TO_NATIVE:
1600 case FRAME_TYPE_TRAMPOLINE:
1601 case FRAME_TYPE_INTERP_TO_MANAGED:
1604 case FRAME_TYPE_INTERP:
1605 case FRAME_TYPE_MANAGED:
1608 g_assert_not_reached ();
1612 in_interp = frame.type == FRAME_TYPE_INTERP;
1617 ip = (guint16*)ji->code_start + frame.native_offset;
1619 ip = MONO_CONTEXT_GET_IP (ctx);
1622 method = jinfo_get_method (ji);
1623 //printf ("M: %s %d.\n", mono_method_full_name (method, TRUE), frame_count);
1625 if (mini_get_debug_options ()->reverse_pinvoke_exceptions && method->wrapper_type == MONO_WRAPPER_NATIVE_TO_MANAGED) {
1626 g_error ("A native frame was found while unwinding the stack after an exception.\n"
1627 "The native frame called the managed method:\n%s\n",
1628 mono_method_full_name (method, TRUE));
1631 if (method->wrapper_type != MONO_WRAPPER_RUNTIME_INVOKE && mono_ex) {
1632 // avoid giant stack traces during a stack overflow
1633 if (frame_count < 1000) {
1634 trace_ips = g_list_prepend (trace_ips, MONO_CONTEXT_GET_IP (ctx));
1635 trace_ips = g_list_prepend (trace_ips, get_generic_info_from_stack_frame (ji, ctx));
1639 if (method->dynamic)
1640 dynamic_methods = g_slist_prepend (dynamic_methods, method);
1642 if (stack_overflow) {
1643 if (MONO_ARCH_STACK_GROWS_UP)
1644 free_stack = (guint8*)(MONO_CONTEXT_GET_SP (&initial_ctx)) - (guint8*)(MONO_CONTEXT_GET_SP (ctx));
1646 free_stack = (guint8*)(MONO_CONTEXT_GET_SP (ctx)) - (guint8*)(MONO_CONTEXT_GET_SP (&initial_ctx));
1648 free_stack = 0xffffff;
1651 for (i = clause_index_start; i < ji->num_clauses; i++) {
1652 MonoJitExceptionInfo *ei = &ji->clauses [i];
1653 gboolean filtered = FALSE;
1656 * During stack overflow, wait till the unwinding frees some stack
1657 * space before running handlers/finalizers.
1659 if (free_stack <= (64 * 1024))
1662 if (is_address_protected (ji, ei, ip)) {
1664 MonoClass *catch_class = get_exception_catch_class (ei, ji, ctx);
1667 * Have to unwrap RuntimeWrappedExceptions if the
1668 * method's assembly doesn't have a RuntimeCompatibilityAttribute.
1670 if (non_exception && !wrap_non_exception_throws (method))
1671 ex_obj = non_exception;
1675 if (ei->flags == MONO_EXCEPTION_CLAUSE_FILTER) {
1676 #ifndef DISABLE_PERFCOUNTERS
1677 mono_perfcounters->exceptions_filters++;
1680 #ifndef MONO_CROSS_COMPILE
1681 #ifdef MONO_CONTEXT_SET_LLVM_EXC_REG
1683 MONO_CONTEXT_SET_LLVM_EXC_REG (ctx, ex_obj);
1685 /* Can't pass the ex object in a register yet to filter clauses, because call_filter () might not support it */
1686 *((gpointer *)(gpointer)((char *)MONO_CONTEXT_GET_BP (ctx) + ei->exvar_offset)) = ex_obj;
1688 g_assert (!ji->from_llvm);
1689 /* store the exception object in bp + ei->exvar_offset */
1690 *((gpointer *)(gpointer)((char *)MONO_CONTEXT_GET_BP (ctx) + ei->exvar_offset)) = ex_obj;
1694 #ifdef MONO_CONTEXT_SET_LLVM_EH_SELECTOR_REG
1696 * Pass the original il clause index to the landing pad so it can
1697 * branch to the landing pad associated with the il clause.
1698 * This is needed because llvm compiled code assumes that the EH
1699 * code always branches to the innermost landing pad.
1702 MONO_CONTEXT_SET_LLVM_EH_SELECTOR_REG (ctx, ei->clause_index);
1705 mono_debugger_agent_begin_exception_filter (mono_ex, ctx, &initial_ctx);
1706 filtered = call_filter (ctx, ei->data.filter);
1707 mono_debugger_agent_end_exception_filter (mono_ex, ctx, &initial_ctx);
1708 if (filtered && out_filter_idx)
1709 *out_filter_idx = filter_idx;
1715 setup_stack_trace (mono_ex, dynamic_methods, &trace_ips);
1716 g_slist_free (dynamic_methods);
1717 /* mono_debugger_agent_handle_exception () needs this */
1718 mini_set_abort_threshold (ctx);
1719 MONO_CONTEXT_SET_IP (ctx, ei->handler_start);
1724 MonoError isinst_error;
1725 error_init (&isinst_error);
1726 if (ei->flags == MONO_EXCEPTION_CLAUSE_NONE && mono_object_isinst_checked (ex_obj, catch_class, &error)) {
1727 setup_stack_trace (mono_ex, dynamic_methods, &trace_ips);
1728 g_slist_free (dynamic_methods);
1733 /* mono_debugger_agent_handle_exception () needs this */
1735 MONO_CONTEXT_SET_IP (ctx, ei->handler_start);
1738 mono_error_cleanup (&isinst_error);
1745 g_assert_not_reached ();
1749 * mono_handle_exception_internal:
1750 * \param ctx saved processor state
1751 * \param obj the exception object
1752 * \param resume whenever to resume unwinding based on the state in \c MonoJitTlsData.
1755 mono_handle_exception_internal (MonoContext *ctx, MonoObject *obj, gboolean resume, MonoJitInfo **out_ji)
1758 MonoDomain *domain = mono_domain_get ();
1759 MonoJitInfo *ji, *prev_ji;
1760 static int (*call_filter) (MonoContext *, gpointer) = NULL;
1761 MonoJitTlsData *jit_tls = (MonoJitTlsData *)mono_tls_get_jit_tls ();
1762 MonoLMF *lmf = mono_get_lmf ();
1763 MonoException *mono_ex;
1764 gboolean stack_overflow = FALSE;
1765 MonoContext initial_ctx;
1767 int frame_count = 0;
1768 gint32 filter_idx, first_filter_idx = 0;
1771 MonoObject *non_exception = NULL;
1775 g_assert (ctx != NULL);
1777 MonoException *ex = mono_get_exception_null_reference ();
1778 MONO_OBJECT_SETREF (ex, message, mono_string_new (domain, "Object reference not set to an instance of an object"));
1779 obj = (MonoObject *)ex;
1783 * Allocate a new exception object instead of the preconstructed ones.
1785 if (obj == (MonoObject *)domain->stack_overflow_ex) {
1787 * It is not a good idea to try and put even more pressure on the little stack available.
1788 * obj = mono_get_exception_stack_overflow ();
1790 stack_overflow = TRUE;
1792 else if (obj == (MonoObject *)domain->null_reference_ex) {
1793 obj = (MonoObject *)mono_get_exception_null_reference ();
1796 if (!mono_object_isinst_checked (obj, mono_defaults.exception_class, &error)) {
1797 mono_error_assert_ok (&error);
1798 non_exception = obj;
1799 obj = (MonoObject *)mono_get_exception_runtime_wrapped_checked (obj, &error);
1800 mono_error_assert_ok (&error);
1803 mono_ex = (MonoException*)obj;
1805 if (mini_get_debug_options ()->suspend_on_exception) {
1806 mono_runtime_printf_err ("Exception thrown, suspending...");
1811 if (mono_object_isinst_checked (obj, mono_defaults.exception_class, &error)) {
1812 mono_ex = (MonoException*)obj;
1814 mono_error_assert_ok (&error);
1818 if (mono_ex && jit_tls->class_cast_from) {
1819 if (!strcmp (mono_ex->object.vtable->klass->name, "InvalidCastException")) {
1820 char *from_name = mono_type_get_full_name (jit_tls->class_cast_from);
1821 char *to_name = mono_type_get_full_name (jit_tls->class_cast_to);
1822 char *msg = g_strdup_printf ("Unable to cast object of type '%s' to type '%s'.", from_name, to_name);
1823 mono_ex->message = mono_string_new (domain, msg);
1828 if (!strcmp (mono_ex->object.vtable->klass->name, "ArrayTypeMismatchException")) {
1829 char *from_name = mono_type_get_full_name (jit_tls->class_cast_from);
1830 char *to_name = mono_type_get_full_name (jit_tls->class_cast_to);
1831 char *msg = g_strdup_printf ("Source array of type '%s' cannot be cast to destination array type '%s'.", from_name, to_name);
1832 mono_ex->message = mono_string_new (domain, msg);
1840 call_filter = (int (*)(MonoContext *, void*))mono_get_call_filter ();
1842 g_assert (jit_tls->end_of_stack);
1843 g_assert (jit_tls->abort_func);
1846 * We set orig_ex_ctx_set to TRUE/FALSE around profiler calls to make sure it doesn't
1847 * end up being TRUE on any code path.
1849 memcpy (&jit_tls->orig_ex_ctx, ctx, sizeof (MonoContext));
1854 MonoContext ctx_cp = *ctx;
1855 if (mono_trace_is_enabled ()) {
1856 MonoMethod *system_exception_get_message = mono_class_get_method_from_name (mono_defaults.exception_class, "get_Message", 0);
1857 MonoMethod *get_message = system_exception_get_message == NULL ? NULL : mono_object_get_virtual_method (obj, system_exception_get_message);
1858 MonoObject *message;
1859 const char *type_name = mono_class_get_name (mono_object_class (mono_ex));
1861 if (get_message == NULL) {
1863 } else if (!strcmp (type_name, "OutOfMemoryException") || !strcmp (type_name, "StackOverflowException")) {
1865 msg = g_strdup_printf ("(No exception message for: %s)\n", type_name);
1867 MonoObject *exc = NULL;
1868 message = mono_runtime_try_invoke (get_message, obj, NULL, &exc, &error);
1869 g_assert (exc == NULL);
1870 mono_error_assert_ok (&error);
1874 msg = mono_string_to_utf8_checked ((MonoString *) message, &error);
1875 if (!is_ok (&error)) {
1876 mono_error_cleanup (&error);
1877 msg = g_strdup ("(error while display System.Exception.Message property)");
1880 msg = g_strdup ("(System.Exception.Message property not available)");
1883 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);
1885 if (mono_ex && mono_trace_eval_exception (mono_object_class (mono_ex)))
1886 mono_print_thread_dump_from_ctx (ctx);
1888 jit_tls->orig_ex_ctx_set = TRUE;
1889 mono_profiler_exception_thrown (obj);
1890 jit_tls->orig_ex_ctx_set = FALSE;
1892 res = mono_handle_exception_internal_first_pass (&ctx_cp, obj, &first_filter_idx, &ji, &prev_ji, non_exception);
1895 if (mini_get_debug_options ()->break_on_exc)
1897 mono_debugger_agent_handle_exception ((MonoException *)obj, ctx, NULL);
1899 if (mini_get_debug_options ()->suspend_on_unhandled) {
1900 mono_runtime_printf_err ("Unhandled exception, suspending...");
1905 // FIXME: This runs managed code so it might cause another stack overflow when
1906 // we are handling a stack overflow
1907 mini_set_abort_threshold (ctx);
1908 mono_unhandled_exception (obj);
1910 gboolean unhandled = FALSE;
1913 * The exceptions caught by the mono_runtime_invoke_checked () calls
1914 * in the threadpool needs to be treated as unhandled (#669836).
1916 * FIXME: The check below is hackish, but its hard to distinguish
1917 * these runtime invoke calls from others in the runtime.
1919 if (ji && jinfo_get_method (ji)->wrapper_type == MONO_WRAPPER_RUNTIME_INVOKE) {
1920 if (prev_ji && jinfo_get_method (prev_ji) == mono_defaults.threadpool_perform_wait_callback_method)
1925 mono_debugger_agent_handle_exception ((MonoException *)obj, ctx, NULL);
1927 mono_debugger_agent_handle_exception ((MonoException *)obj, ctx, &ctx_cp);
1936 unwinder_init (&unwinder);
1939 MonoContext new_ctx;
1941 int clause_index_start = 0;
1942 gboolean unwind_res = TRUE;
1943 StackFrameInfo frame;
1948 ji = jit_tls->resume_state.ji;
1949 new_ctx = jit_tls->resume_state.new_ctx;
1950 clause_index_start = jit_tls->resume_state.clause_index;
1951 lmf = jit_tls->resume_state.lmf;
1952 first_filter_idx = jit_tls->resume_state.first_filter_idx;
1953 filter_idx = jit_tls->resume_state.filter_idx;
1956 unwind_res = unwinder_unwind_frame (&unwinder, domain, jit_tls, NULL, ctx, &new_ctx, NULL, &lmf, NULL, &frame);
1958 *(mono_get_lmf_addr ()) = lmf;
1960 jit_tls->abort_func (obj);
1961 g_assert_not_reached ();
1963 switch (frame.type) {
1964 case FRAME_TYPE_DEBUGGER_INVOKE:
1965 case FRAME_TYPE_MANAGED_TO_NATIVE:
1966 case FRAME_TYPE_TRAMPOLINE:
1969 case FRAME_TYPE_INTERP_TO_MANAGED:
1971 case FRAME_TYPE_INTERP:
1972 case FRAME_TYPE_MANAGED:
1975 g_assert_not_reached ();
1978 in_interp = frame.type == FRAME_TYPE_INTERP;
1983 ip = (guint16*)ji->code_start + frame.native_offset;
1985 ip = MONO_CONTEXT_GET_IP (ctx);
1987 method = jinfo_get_method (ji);
1989 //printf ("M: %s %d.\n", mono_method_full_name (method, TRUE), frame_count);
1991 if (stack_overflow) {
1992 if (MONO_ARCH_STACK_GROWS_UP)
1993 free_stack = (guint8*)(MONO_CONTEXT_GET_SP (&initial_ctx)) - (guint8*)(MONO_CONTEXT_GET_SP (ctx));
1995 free_stack = (guint8*)(MONO_CONTEXT_GET_SP (ctx)) - (guint8*)(MONO_CONTEXT_GET_SP (&initial_ctx));
1997 free_stack = 0xffffff;
2000 for (i = clause_index_start; i < ji->num_clauses; i++) {
2001 MonoJitExceptionInfo *ei = &ji->clauses [i];
2002 gboolean filtered = FALSE;
2005 * During stack overflow, wait till the unwinding frees some stack
2006 * space before running handlers/finalizers.
2008 if (free_stack <= (64 * 1024))
2011 if (is_address_protected (ji, ei, ip)) {
2013 MonoClass *catch_class = get_exception_catch_class (ei, ji, ctx);
2016 * Have to unwrap RuntimeWrappedExceptions if the
2017 * method's assembly doesn't have a RuntimeCompatibilityAttribute.
2019 if (non_exception && !wrap_non_exception_throws (method))
2020 ex_obj = non_exception;
2024 if (((ei->flags == MONO_EXCEPTION_CLAUSE_NONE) || (ei->flags == MONO_EXCEPTION_CLAUSE_FILTER))) {
2025 #ifndef MONO_CROSS_COMPILE
2026 #ifdef MONO_CONTEXT_SET_LLVM_EXC_REG
2027 MONO_CONTEXT_SET_LLVM_EXC_REG (ctx, ex_obj);
2029 g_assert (!ji->from_llvm);
2030 /* store the exception object in bp + ei->exvar_offset */
2031 *((gpointer *)(gpointer)((char *)MONO_CONTEXT_GET_BP (ctx) + ei->exvar_offset)) = ex_obj;
2036 #ifdef MONO_CONTEXT_SET_LLVM_EH_SELECTOR_REG
2038 MONO_CONTEXT_SET_LLVM_EH_SELECTOR_REG (ctx, ei->clause_index);
2041 if (ei->flags == MONO_EXCEPTION_CLAUSE_FILTER) {
2043 * Filter clauses should only be run in the
2044 * first pass of exception handling.
2046 filtered = (filter_idx == first_filter_idx);
2050 error_init (&error);
2051 if ((ei->flags == MONO_EXCEPTION_CLAUSE_NONE &&
2052 mono_object_isinst_checked (ex_obj, catch_class, &error)) || filtered) {
2054 * This guards against the situation that we abort a thread that is executing a finally clause
2055 * that was called by the EH machinery. It won't have a guard trampoline installed, so we must
2056 * check for this situation here and resume interruption if we are below the guarded block.
2058 if (G_UNLIKELY (jit_tls->handler_block_return_address)) {
2059 gboolean is_outside = FALSE;
2060 gpointer prot_bp = MONO_CONTEXT_GET_BP (&jit_tls->handler_block_context);
2061 gpointer catch_bp = MONO_CONTEXT_GET_BP (ctx);
2062 //FIXME make this stack direction aware
2063 if (catch_bp > prot_bp) {
2065 } else if (catch_bp == prot_bp) {
2066 /* Can be either try { try { } catch {} } finally {} or try { try { } finally {} } catch {}
2067 * So we check if the catch handler_start is protected by the guarded handler protected region
2070 * If there is an outstanding guarded_block return address, it means the current thread must be aborted.
2071 * This is the only way to reach out the guarded block as other cases are handled by the trampoline.
2072 * There aren't any further finally/fault handler blocks down the stack over this exception.
2073 * This must be ensured by the code that installs the guard trampoline.
2075 g_assert (ji == mini_jit_info_table_find (domain, (char *)MONO_CONTEXT_GET_IP (&jit_tls->handler_block_context), NULL));
2077 if (!is_address_protected (ji, jit_tls->handler_block, ei->handler_start)) {
2082 jit_tls->handler_block_return_address = NULL;
2083 jit_tls->handler_block = NULL;
2084 mono_thread_resume_interruption (TRUE); /*We ignore the exception here, it will be raised later*/
2088 if (mono_trace_is_enabled () && mono_trace_eval (method))
2089 g_print ("EXCEPTION: catch found at clause %d of %s\n", i, mono_method_full_name (method, TRUE));
2090 jit_tls->orig_ex_ctx_set = TRUE;
2091 mono_profiler_exception_clause_handler (method, ei->flags, i);
2092 jit_tls->orig_ex_ctx_set = FALSE;
2093 mini_set_abort_threshold (ctx);
2097 * ctx->pc points into the interpreter, after the call which transitioned to
2098 * JITted code. Store the unwind state into the
2099 * interpeter state, then resume, the interpreter will unwind itself until
2100 * it reaches the target frame and will continue execution from there.
2101 * The resuming is kinda hackish, from the native code standpoint, it looks
2102 * like the call which transitioned to JITted code has succeeded, but the
2103 * return value register etc. is not set, so we have to be careful.
2105 mono_interp_set_resume_state (mono_ex, &frame, ei->handler_start);
2106 /* Undo the IP adjustment done by mono_arch_unwind_frame () */
2108 ctx->gregs [AMD64_RIP] ++;
2113 MONO_CONTEXT_SET_IP (ctx, ei->handler_start);
2116 #ifndef DISABLE_PERFCOUNTERS
2117 mono_perfcounters->exceptions_depth += frame_count;
2119 if (obj == (MonoObject *)domain->stack_overflow_ex)
2120 jit_tls->handling_stack_ovf = FALSE;
2124 mono_error_cleanup (&error);
2125 if (ei->flags == MONO_EXCEPTION_CLAUSE_FAULT) {
2126 if (mono_trace_is_enabled () && mono_trace_eval (method))
2127 g_print ("EXCEPTION: fault clause %d of %s\n", i, mono_method_full_name (method, TRUE));
2128 jit_tls->orig_ex_ctx_set = TRUE;
2129 mono_profiler_exception_clause_handler (method, ei->flags, i);
2130 jit_tls->orig_ex_ctx_set = FALSE;
2131 mini_set_abort_threshold (ctx);
2132 call_filter (ctx, ei->handler_start);
2134 if (ei->flags == MONO_EXCEPTION_CLAUSE_FINALLY) {
2135 if (mono_trace_is_enabled () && mono_trace_eval (method))
2136 g_print ("EXCEPTION: finally clause %d of %s\n", i, mono_method_full_name (method, TRUE));
2137 jit_tls->orig_ex_ctx_set = TRUE;
2138 mono_profiler_exception_clause_handler (method, ei->flags, i);
2139 jit_tls->orig_ex_ctx_set = FALSE;
2140 #ifndef DISABLE_PERFCOUNTERS
2141 mono_perfcounters->exceptions_finallys++;
2144 if (ji->from_llvm) {
2146 * LLVM compiled finally handlers follow the design
2147 * of the c++ ehabi, i.e. they call a resume function
2148 * at the end instead of returning to the caller.
2149 * So save the exception handling state,
2150 * mono_resume_unwind () will call us again to continue
2153 jit_tls->resume_state.ex_obj = obj;
2154 jit_tls->resume_state.ji = ji;
2155 jit_tls->resume_state.clause_index = i + 1;
2156 jit_tls->resume_state.ctx = *ctx;
2157 jit_tls->resume_state.new_ctx = new_ctx;
2158 jit_tls->resume_state.lmf = lmf;
2159 jit_tls->resume_state.first_filter_idx = first_filter_idx;
2160 jit_tls->resume_state.filter_idx = filter_idx;
2161 mini_set_abort_threshold (ctx);
2162 MONO_CONTEXT_SET_IP (ctx, ei->handler_start);
2165 mini_set_abort_threshold (ctx);
2167 mono_interp_run_finally (&frame, i, ei->handler_start);
2169 call_filter (ctx, ei->handler_start);
2175 jit_tls->orig_ex_ctx_set = TRUE;
2176 mono_profiler_exception_method_leave (method);
2177 jit_tls->orig_ex_ctx_set = FALSE;
2182 g_assert_not_reached ();
2186 * mono_debugger_run_finally:
2187 * \param start_ctx saved processor state
2188 * This method is called by the Mono Debugger to call all \c finally clauses of the
2189 * current stack frame. It's used when the user issues a \c return command to make
2190 * the current stack frame return. After returning from this method, the debugger
2191 * unwinds the stack one frame and gives control back to the user.
2192 * NOTE: This method is only used when running inside the Mono Debugger.
2195 mono_debugger_run_finally (MonoContext *start_ctx)
2197 static int (*call_filter) (MonoContext *, gpointer) = NULL;
2198 MonoDomain *domain = mono_domain_get ();
2199 MonoJitTlsData *jit_tls = (MonoJitTlsData *)mono_tls_get_jit_tls ();
2200 MonoLMF *lmf = mono_get_lmf ();
2201 MonoContext ctx, new_ctx;
2202 MonoJitInfo *ji, rji;
2207 ji = mono_find_jit_info (domain, jit_tls, &rji, NULL, &ctx, &new_ctx, NULL, &lmf, NULL, NULL);
2208 if (!ji || ji == (gpointer)-1)
2212 call_filter = (int (*)(MonoContext *, void *))mono_get_call_filter ();
2214 for (i = 0; i < ji->num_clauses; i++) {
2215 MonoJitExceptionInfo *ei = &ji->clauses [i];
2217 if (is_address_protected (ji, ei, MONO_CONTEXT_GET_IP (&ctx)) &&
2218 (ei->flags & MONO_EXCEPTION_CLAUSE_FINALLY)) {
2219 call_filter (&ctx, ei->handler_start);
2225 * mono_handle_exception:
2226 * \param ctx saved processor state
2227 * \param obj the exception object
2230 mono_handle_exception (MonoContext *ctx, MonoObject *obj)
2232 MONO_REQ_GC_UNSAFE_MODE;
2234 #ifndef DISABLE_PERFCOUNTERS
2235 mono_perfcounters->exceptions_thrown++;
2238 return mono_handle_exception_internal (ctx, obj, FALSE, NULL);
2241 #ifdef MONO_ARCH_SIGSEGV_ON_ALTSTACK
2243 #ifndef MONO_ARCH_USE_SIGACTION
2244 #error "Can't use sigaltstack without sigaction"
2247 #define ALIGN_TO(val,align) ((((guint64)val) + ((align) - 1)) & ~((align) - 1))
2250 mono_setup_altstack (MonoJitTlsData *tls)
2254 guint8 *staddr = NULL;
2256 if (mono_running_on_valgrind ())
2259 mono_thread_info_get_stack_bounds (&staddr, &stsize);
2263 tls->end_of_stack = staddr + stsize;
2264 tls->stack_size = stsize;
2266 /*g_print ("thread %p, stack_base: %p, stack_size: %d\n", (gpointer)pthread_self (), staddr, stsize);*/
2268 tls->stack_ovf_guard_base = staddr + mono_pagesize ();
2269 tls->stack_ovf_guard_size = ALIGN_TO (8 * 4096, mono_pagesize ());
2271 g_assert ((guint8*)&sa >= (guint8*)tls->stack_ovf_guard_base + tls->stack_ovf_guard_size);
2273 if (mono_mprotect (tls->stack_ovf_guard_base, tls->stack_ovf_guard_size, MONO_MMAP_NONE)) {
2274 /* mprotect can fail for the main thread stack */
2275 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);
2276 g_assert (gaddr == tls->stack_ovf_guard_base);
2277 tls->stack_ovf_valloced = TRUE;
2280 /* Setup an alternate signal stack */
2281 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);
2282 tls->signal_stack_size = MONO_ARCH_SIGNAL_STACK_SIZE;
2284 g_assert (tls->signal_stack);
2286 sa.ss_sp = tls->signal_stack;
2287 sa.ss_size = MONO_ARCH_SIGNAL_STACK_SIZE;
2289 g_assert (sigaltstack (&sa, NULL) == 0);
2291 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);
2295 mono_free_altstack (MonoJitTlsData *tls)
2300 sa.ss_sp = tls->signal_stack;
2301 sa.ss_size = MONO_ARCH_SIGNAL_STACK_SIZE;
2302 sa.ss_flags = SS_DISABLE;
2303 err = sigaltstack (&sa, NULL);
2304 g_assert (err == 0);
2306 if (tls->signal_stack)
2307 mono_vfree (tls->signal_stack, MONO_ARCH_SIGNAL_STACK_SIZE, MONO_MEM_ACCOUNT_EXCEPTIONS);
2308 if (tls->stack_ovf_valloced)
2309 mono_vfree (tls->stack_ovf_guard_base, tls->stack_ovf_guard_size, MONO_MEM_ACCOUNT_EXCEPTIONS);
2311 mono_mprotect (tls->stack_ovf_guard_base, tls->stack_ovf_guard_size, MONO_MMAP_READ|MONO_MMAP_WRITE);
2314 #else /* !MONO_ARCH_SIGSEGV_ON_ALTSTACK */
2317 mono_setup_altstack (MonoJitTlsData *tls)
2322 mono_free_altstack (MonoJitTlsData *tls)
2326 #endif /* MONO_ARCH_SIGSEGV_ON_ALTSTACK */
2329 try_restore_stack_protection (MonoJitTlsData *jit_tls, int extra_bytes)
2331 gint32 unprotect_size = jit_tls->stack_ovf_guard_size;
2332 /* we need to leave some room for throwing the exception */
2333 while (unprotect_size >= 0 && (char*)jit_tls->stack_ovf_guard_base + unprotect_size > ((char*)&unprotect_size - extra_bytes))
2334 unprotect_size -= mono_pagesize ();
2335 /* at this point we could try and build a new domain->stack_overflow_ex, but only if there
2336 * is sufficient stack
2338 //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);
2340 mono_mprotect (jit_tls->stack_ovf_guard_base, unprotect_size, MONO_MMAP_NONE);
2341 return unprotect_size == jit_tls->stack_ovf_guard_size;
2344 static G_GNUC_UNUSED void
2345 try_more_restore (void)
2347 MonoJitTlsData *jit_tls = (MonoJitTlsData *)mono_tls_get_jit_tls ();
2348 if (try_restore_stack_protection (jit_tls, 500))
2349 jit_tls->restore_stack_prot = NULL;
2352 static G_GNUC_UNUSED void
2353 restore_stack_protection (void)
2355 MonoJitTlsData *jit_tls = (MonoJitTlsData *)mono_tls_get_jit_tls ();
2356 MonoException *ex = mono_domain_get ()->stack_overflow_ex;
2357 /* if we can't restore the stack protection, keep a callback installed so
2358 * we'll try to restore as much stack as we can at each return from unmanaged
2361 if (try_restore_stack_protection (jit_tls, 4096))
2362 jit_tls->restore_stack_prot = NULL;
2364 jit_tls->restore_stack_prot = try_more_restore_tramp;
2365 /* here we also throw a stack overflow exception */
2366 ex->trace_ips = NULL;
2367 ex->stack_trace = NULL;
2368 mono_raise_exception (ex);
2372 mono_altstack_restore_prot (mgreg_t *regs, guint8 *code, gpointer *tramp_data, guint8* tramp)
2374 MONO_REQ_GC_UNSAFE_MODE;
2376 void (*func)(void) = (void (*)(void))tramp_data;
2382 mono_handle_soft_stack_ovf (MonoJitTlsData *jit_tls, MonoJitInfo *ji, void *ctx, MONO_SIG_HANDLER_INFO_TYPE *siginfo, guint8* fault_addr)
2387 /* we got a stack overflow in the soft-guard pages
2388 * There are two cases:
2389 * 1) managed code caused the overflow: we unprotect the soft-guard page
2390 * and let the arch-specific code trigger the exception handling mechanism
2391 * in the thread stack. The soft-guard pages will be protected again as the stack is unwound.
2392 * 2) unmanaged code caused the overflow: we unprotect the soft-guard page
2393 * and hope we can continue with those enabled, at least until the hard-guard page
2394 * is hit. The alternative to continuing here is to just print a message and abort.
2395 * We may add in the future the code to protect the pages again in the codepath
2396 * when we return from unmanaged to managed code.
2398 if (jit_tls->stack_ovf_guard_size && fault_addr >= (guint8*)jit_tls->stack_ovf_guard_base &&
2399 fault_addr < (guint8*)jit_tls->stack_ovf_guard_base + jit_tls->stack_ovf_guard_size) {
2400 /* we unprotect the minimum amount we can */
2402 gboolean handled = FALSE;
2404 guard_size = jit_tls->stack_ovf_guard_size - (mono_pagesize () * SIZEOF_VOID_P / 4);
2405 while (guard_size && fault_addr < (guint8*)jit_tls->stack_ovf_guard_base + guard_size) {
2406 guard_size -= mono_pagesize ();
2408 guard_size = jit_tls->stack_ovf_guard_size - guard_size;
2409 /*fprintf (stderr, "unprotecting: %d\n", guard_size);*/
2410 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);
2411 #ifdef MONO_ARCH_SIGSEGV_ON_ALTSTACK
2413 mono_arch_handle_altstack_exception (ctx, siginfo, fault_addr, TRUE);
2418 /* We print a message: after this even managed stack overflows
2419 * may crash the runtime
2421 mono_runtime_printf_err ("Stack overflow in unmanaged: IP: %p, fault addr: %p", mono_arch_ip_from_context (ctx), fault_addr);
2422 if (!jit_tls->handling_stack_ovf) {
2423 jit_tls->restore_stack_prot = restore_stack_protection_tramp;
2424 jit_tls->handling_stack_ovf = 1;
2426 /*fprintf (stderr, "Already handling stack overflow\n");*/
2435 MonoMethod *omethod;
2437 } PrintOverflowUserData;
2439 #ifdef MONO_ARCH_HAVE_SIGCTX_TO_MONOCTX
2441 print_overflow_stack_frame (StackFrameInfo *frame, MonoContext *ctx, gpointer data)
2443 MonoMethod *method = NULL;
2444 PrintOverflowUserData *user_data = (PrintOverflowUserData *)data;
2447 if (frame->ji && frame->type != FRAME_TYPE_TRAMPOLINE)
2448 method = jinfo_get_method (frame->ji);
2451 if (user_data->count == 0) {
2452 /* The first frame is in its prolog, so a line number cannot be computed */
2453 user_data->count ++;
2457 /* If this is a one method overflow, skip the other instances */
2458 if (method == user_data->omethod)
2461 location = mono_debug_print_stack_frame (method, frame->native_offset, mono_domain_get ());
2462 mono_runtime_printf_err (" %s", location);
2465 if (user_data->count == 1) {
2466 mono_runtime_printf_err (" <...>");
2467 user_data->omethod = method;
2469 user_data->omethod = NULL;
2472 user_data->count ++;
2474 mono_runtime_printf_err (" at <unknown> <0x%05x>", frame->native_offset);
2481 mono_handle_hard_stack_ovf (MonoJitTlsData *jit_tls, MonoJitInfo *ji, void *ctx, guint8* fault_addr)
2483 #ifdef MONO_ARCH_HAVE_SIGCTX_TO_MONOCTX
2484 PrintOverflowUserData ud;
2488 /* we don't do much now, but we can warn the user with a useful message */
2489 mono_runtime_printf_err ("Stack overflow: IP: %p, fault addr: %p", mono_arch_ip_from_context (ctx), fault_addr);
2491 #ifdef MONO_ARCH_HAVE_SIGCTX_TO_MONOCTX
2492 mono_sigctx_to_monoctx (ctx, &mctx);
2494 mono_runtime_printf_err ("Stacktrace:");
2496 memset (&ud, 0, sizeof (ud));
2498 mono_walk_stack_with_ctx (print_overflow_stack_frame, &mctx, MONO_UNWIND_LOOKUP_ACTUAL_METHOD, &ud);
2500 if (ji && !ji->is_trampoline && jinfo_get_method (ji))
2501 mono_runtime_printf_err ("At %s", mono_method_full_name (jinfo_get_method (ji), TRUE));
2503 mono_runtime_printf_err ("At <unmanaged>.");
2510 print_stack_frame_to_stderr (StackFrameInfo *frame, MonoContext *ctx, gpointer data)
2512 MonoMethod *method = NULL;
2514 if (frame->ji && frame->type != FRAME_TYPE_TRAMPOLINE)
2515 method = jinfo_get_method (frame->ji);
2518 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, mono_domain_get ());
2519 mono_runtime_printf_err (" %s", location);
2522 mono_runtime_printf_err (" at <unknown> <0x%05x>", frame->native_offset);
2527 static G_GNUC_UNUSED gboolean
2528 print_stack_frame_to_string (StackFrameInfo *frame, MonoContext *ctx, gpointer data)
2530 GString *p = (GString*)data;
2531 MonoMethod *method = NULL;
2533 if (frame->ji && frame->type != FRAME_TYPE_TRAMPOLINE)
2534 method = jinfo_get_method (frame->ji);
2536 if (method && frame->domain) {
2537 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, frame->domain);
2538 g_string_append_printf (p, " %s\n", location);
2541 g_string_append_printf (p, " at <unknown> <0x%05x>\n", frame->native_offset);
2546 #ifndef MONO_CROSS_COMPILE
2548 static void print_process_map (void)
2551 FILE *fp = fopen ("/proc/self/maps", "r");
2555 mono_runtime_printf_err ("no /proc/self/maps, not on linux?\n");
2559 mono_runtime_printf_err ("/proc/self/maps:");
2561 while (fgets (line, sizeof (line), fp)) {
2563 size_t len = strlen (line) - 1;
2564 if (len >= 0 && line [len] == '\n')
2567 mono_runtime_printf_err ("%s", line);
2576 static gboolean handling_sigsegv = FALSE;
2579 * mono_handle_native_crash:
2581 * Handle a native crash (e.g. SIGSEGV) while in native code by
2582 * printing diagnostic information and aborting.
2585 mono_handle_native_crash (const char *signal, void *ctx, MONO_SIG_HANDLER_INFO_TYPE *info)
2587 #ifdef MONO_ARCH_USE_SIGACTION
2588 struct sigaction sa;
2590 MonoJitTlsData *jit_tls = (MonoJitTlsData *)mono_tls_get_jit_tls ();
2592 gboolean is_sigsegv = !strcmp ("SIGSEGV", signal);
2594 if (handling_sigsegv && is_sigsegv)
2597 if (mini_get_debug_options ()->suspend_on_native_crash) {
2598 mono_runtime_printf_err ("Received %s, suspending...", signal);
2609 /* To prevent infinite loops when the stack walk causes a crash */
2611 handling_sigsegv = TRUE;
2613 /* !jit_tls means the thread was not registered with the runtime */
2614 if (jit_tls && mono_thread_internal_current ()) {
2615 mono_runtime_printf_err ("Stacktrace:\n");
2617 /* FIXME: Is MONO_UNWIND_LOOKUP_IL_OFFSET correct here? */
2618 mono_walk_stack (print_stack_frame_to_stderr, MONO_UNWIND_LOOKUP_IL_OFFSET, NULL);
2621 print_process_map ();
2623 #ifdef HAVE_BACKTRACE_SYMBOLS
2629 mono_runtime_printf_err ("\nNative stacktrace:\n");
2631 size = backtrace (array, 256);
2632 names = backtrace_symbols (array, size);
2633 for (i =0; i < size; ++i) {
2634 mono_runtime_printf_err ("\t%s", names [i]);
2638 /* Try to get more meaningful information using gdb */
2640 #if !defined(HOST_WIN32) && defined(HAVE_SYS_SYSCALL_H) && defined(SYS_fork)
2641 if (!mini_get_debug_options ()->no_gdb_backtrace) {
2642 /* From g_spawn_command_line_sync () in eglib */
2645 pid_t crashed_pid = getpid ();
2648 * glibc fork acquires some locks, so if the crash happened inside malloc/free,
2649 * it will deadlock. Call the syscall directly instead.
2651 #if defined(PLATFORM_ANDROID)
2652 /* SYS_fork is defined to be __NR_fork which is not defined in some ndk versions */
2653 g_assert_not_reached ();
2654 #elif !defined(PLATFORM_MACOSX) && defined(SYS_fork)
2655 pid = (pid_t) syscall (SYS_fork);
2656 #elif defined(PLATFORM_MACOSX) && HAVE_FORK
2657 pid = (pid_t) fork ();
2659 g_assert_not_reached ();
2662 #if defined (HAVE_PRCTL) && defined(PR_SET_PTRACER)
2664 // Allow gdb to attach to the process even if ptrace_scope sysctl variable is set to
2665 // a value other than 0 (the most permissive ptrace scope). Most modern Linux
2666 // distributions set the scope to 1 which allows attaching only to direct children of
2667 // the current process
2668 prctl (PR_SET_PTRACER, pid, 0, 0, 0);
2672 dup2 (STDERR_FILENO, STDOUT_FILENO);
2674 mono_gdb_render_native_backtraces (crashed_pid);
2678 mono_runtime_printf_err ("\nDebug info from gdb:\n");
2679 waitpid (pid, &status, 0);
2684 #ifdef PLATFORM_ANDROID
2685 /* set DUMPABLE for this process so debuggerd can attach with ptrace(2), see:
2686 * https://android.googlesource.com/platform/bionic/+/151da681000c07da3c24cd30a3279b1ca017f452/linker/debugger.cpp#206
2687 * this has changed on later versions of Android. Also, we don't want to
2688 * set this on start-up as DUMPABLE has security implications. */
2689 prctl (PR_SET_DUMPABLE, 1);
2691 mono_runtime_printf_err ("\nNo native Android stacktrace (see debuggerd output).\n");
2696 * A SIGSEGV indicates something went very wrong so we can no longer depend
2697 * on anything working. So try to print out lots of diagnostics, starting
2698 * with ones which have a greater chance of working.
2700 mono_runtime_printf_err (
2702 "=================================================================\n"
2703 "Got a %s while executing native code. This usually indicates\n"
2704 "a fatal error in the mono runtime or one of the native libraries \n"
2705 "used by your application.\n"
2706 "=================================================================\n",
2709 #ifdef MONO_ARCH_USE_SIGACTION
2710 sa.sa_handler = SIG_DFL;
2711 sigemptyset (&sa.sa_mask);
2714 /* Remove our SIGABRT handler */
2715 g_assert (sigaction (SIGABRT, &sa, NULL) != -1);
2717 /* On some systems we get a SIGILL when calling abort (), because it might
2718 * fail to raise SIGABRT */
2719 g_assert (sigaction (SIGILL, &sa, NULL) != -1);
2722 if (!mono_do_crash_chaining) {
2723 /*Android abort is a fluke, it doesn't abort, it triggers another segv. */
2724 #if defined (PLATFORM_ANDROID)
2735 mono_handle_native_crash (const char *signal, void *ctx, MONO_SIG_HANDLER_INFO_TYPE *info)
2737 g_assert_not_reached ();
2740 #endif /* !MONO_CROSS_COMPILE */
2743 mono_print_thread_dump_internal (void *sigctx, MonoContext *start_ctx)
2745 MonoInternalThread *thread = mono_thread_internal_current ();
2746 #ifdef MONO_ARCH_HAVE_SIGCTX_TO_MONOCTX
2751 GError *error = NULL;
2756 text = g_string_new (0);
2758 name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
2760 g_string_append_printf (text, "\n\"%s\"", name);
2763 else if (thread->threadpool_thread)
2764 g_string_append (text, "\n\"<threadpool thread>\"");
2766 g_string_append (text, "\n\"<unnamed thread>\"");
2768 g_string_append_printf (text, " tid=0x%p this=0x%p ", (gpointer)(gsize)thread->tid, thread);
2769 mono_thread_internal_describe (thread, text);
2770 g_string_append (text, "\n");
2772 #ifdef MONO_ARCH_HAVE_SIGCTX_TO_MONOCTX
2774 memcpy (&ctx, start_ctx, sizeof (MonoContext));
2776 MONO_INIT_CONTEXT_FROM_FUNC (&ctx, mono_print_thread_dump);
2778 mono_sigctx_to_monoctx (sigctx, &ctx);
2780 mono_walk_stack_with_ctx (print_stack_frame_to_string, &ctx, MONO_UNWIND_LOOKUP_ALL, text);
2782 mono_runtime_printf ("\t<Stack traces in thread dumps not supported on this platform>");
2785 mono_runtime_printf ("%s", text->str);
2787 #if PLATFORM_WIN32 && TARGET_WIN32 && _DEBUG
2788 OutputDebugStringA(text->str);
2791 g_string_free (text, TRUE);
2792 mono_runtime_stdout_fflush ();
2796 * mono_print_thread_dump:
2798 * Print information about the current thread to stdout.
2799 * \p sigctx can be NULL, allowing this to be called from gdb.
2802 mono_print_thread_dump (void *sigctx)
2804 mono_print_thread_dump_internal (sigctx, NULL);
2808 mono_print_thread_dump_from_ctx (MonoContext *ctx)
2810 mono_print_thread_dump_internal (NULL, ctx);
2814 * mono_resume_unwind:
2816 * This is called by a trampoline from LLVM compiled finally clauses to continue
2820 mono_resume_unwind (MonoContext *ctx)
2822 MONO_REQ_GC_UNSAFE_MODE;
2824 MonoJitTlsData *jit_tls = (MonoJitTlsData *)mono_tls_get_jit_tls ();
2825 MonoContext new_ctx;
2827 MONO_CONTEXT_SET_IP (ctx, MONO_CONTEXT_GET_IP (&jit_tls->resume_state.ctx));
2828 MONO_CONTEXT_SET_SP (ctx, MONO_CONTEXT_GET_SP (&jit_tls->resume_state.ctx));
2831 mono_handle_exception_internal (&new_ctx, (MonoObject *)jit_tls->resume_state.ex_obj, TRUE, NULL);
2833 mono_restore_context (&new_ctx);
2836 #ifdef MONO_ARCH_HAVE_HANDLER_BLOCK_GUARD
2841 MonoJitExceptionInfo *ei;
2842 } FindHandlerBlockData;
2845 find_last_handler_block (StackFrameInfo *frame, MonoContext *ctx, gpointer data)
2849 FindHandlerBlockData *pdata = (FindHandlerBlockData *)data;
2850 MonoJitInfo *ji = frame->ji;
2855 ip = MONO_CONTEXT_GET_IP (ctx);
2857 for (i = 0; i < ji->num_clauses; ++i) {
2858 MonoJitExceptionInfo *ei = ji->clauses + i;
2859 if (ei->flags != MONO_EXCEPTION_CLAUSE_FINALLY)
2861 /*If ip points to the first instruction it means the handler block didn't start
2862 so we can leave its execution to the EH machinery*/
2863 if (ei->handler_start < ip && ip < ei->data.handler_end) {
2875 install_handler_block_guard (MonoJitInfo *ji, MonoContext *ctx)
2878 MonoJitExceptionInfo *clause = NULL;
2881 ip = MONO_CONTEXT_GET_IP (ctx);
2883 for (i = 0; i < ji->num_clauses; ++i) {
2884 clause = &ji->clauses [i];
2885 if (clause->flags != MONO_EXCEPTION_CLAUSE_FINALLY)
2887 if (clause->handler_start < ip && clause->data.handler_end > ip)
2891 /*no matching finally */
2892 if (i == ji->num_clauses)
2895 /*If we stopped on the instruction right before the try, we haven't actually started executing it*/
2896 if (ip == clause->handler_start)
2899 return mono_arch_install_handler_block_guard (ji, clause, ctx, mono_create_handler_block_trampoline ());
2903 * Finds the bottom handler block running and install a block guard if needed.
2906 mono_install_handler_block_guard (MonoThreadUnwindState *ctx)
2908 FindHandlerBlockData data = { 0 };
2909 MonoJitTlsData *jit_tls = (MonoJitTlsData *)ctx->unwind_data [MONO_UNWIND_DATA_JIT_TLS];
2912 #ifndef MONO_ARCH_HAVE_HANDLER_BLOCK_GUARD_AOT
2917 /* Guard against a null MonoJitTlsData. This can happens if the thread receives the
2918 * interrupt signal before the JIT has time to initialize its TLS data for the given thread.
2920 if (!jit_tls || jit_tls->handler_block_return_address)
2923 /* Do an async safe stack walk */
2924 mono_thread_info_set_is_async_context (TRUE);
2925 mono_walk_stack_with_state (find_last_handler_block, ctx, MONO_UNWIND_NONE, &data);
2926 mono_thread_info_set_is_async_context (FALSE);
2931 memcpy (&jit_tls->handler_block_context, &data.ctx, sizeof (MonoContext));
2933 resume_ip = install_handler_block_guard (data.ji, &data.ctx);
2934 if (resume_ip == NULL)
2937 jit_tls->handler_block_return_address = resume_ip;
2938 jit_tls->handler_block = data.ei;
2944 mono_current_thread_has_handle_block_guard (void)
2946 MonoJitTlsData *jit_tls = (MonoJitTlsData *)mono_tls_get_jit_tls ();
2947 return jit_tls && jit_tls->handler_block_return_address != NULL;
2952 mono_install_handler_block_guard (MonoThreadUnwindState *ctx)
2958 mono_current_thread_has_handle_block_guard (void)
2966 mono_set_cast_details (MonoClass *from, MonoClass *to)
2968 MonoJitTlsData *jit_tls = NULL;
2970 if (mini_get_debug_options ()->better_cast_details) {
2971 jit_tls = (MonoJitTlsData *)mono_tls_get_jit_tls ();
2972 jit_tls->class_cast_from = from;
2973 jit_tls->class_cast_to = to;
2978 /*returns false if the thread is not attached*/
2980 mono_thread_state_init_from_sigctx (MonoThreadUnwindState *ctx, void *sigctx)
2982 #ifdef MONO_ARCH_HAVE_SIGCTX_TO_MONOCTX
2983 MonoThreadInfo *thread = mono_thread_info_current_unchecked ();
2990 mono_sigctx_to_monoctx (sigctx, &ctx->ctx);
2992 ctx->unwind_data [MONO_UNWIND_DATA_DOMAIN] = mono_domain_get ();
2993 ctx->unwind_data [MONO_UNWIND_DATA_LMF] = mono_get_lmf ();
2994 ctx->unwind_data [MONO_UNWIND_DATA_JIT_TLS] = thread->jit_data;
2997 mono_thread_state_init (ctx);
3000 if (!ctx->unwind_data [MONO_UNWIND_DATA_DOMAIN] || !ctx->unwind_data [MONO_UNWIND_DATA_LMF])
3006 g_error ("Implement mono_arch_sigctx_to_monoctx for the current target");
3012 mono_thread_state_init (MonoThreadUnwindState *ctx)
3014 MonoThreadInfo *thread = mono_thread_info_current_unchecked ();
3016 #if defined(MONO_CROSS_COMPILE)
3017 ctx->valid = FALSE; //A cross compiler doesn't need to suspend.
3018 #elif MONO_ARCH_HAS_MONO_CONTEXT
3019 MONO_CONTEXT_GET_CURRENT (ctx->ctx);
3021 g_error ("Use a null sigctx requires a working mono-context");
3024 ctx->unwind_data [MONO_UNWIND_DATA_DOMAIN] = mono_domain_get ();
3025 ctx->unwind_data [MONO_UNWIND_DATA_LMF] = mono_get_lmf ();
3026 ctx->unwind_data [MONO_UNWIND_DATA_JIT_TLS] = thread ? thread->jit_data : NULL;
3032 mono_thread_state_init_from_monoctx (MonoThreadUnwindState *ctx, MonoContext *mctx)
3034 MonoThreadInfo *thread = mono_thread_info_current_unchecked ();
3041 ctx->unwind_data [MONO_UNWIND_DATA_DOMAIN] = mono_domain_get ();
3042 ctx->unwind_data [MONO_UNWIND_DATA_LMF] = mono_get_lmf ();
3043 ctx->unwind_data [MONO_UNWIND_DATA_JIT_TLS] = thread->jit_data;
3048 /*returns false if the thread is not attached*/
3050 mono_thread_state_init_from_current (MonoThreadUnwindState *ctx)
3052 MonoThreadInfo *thread = mono_thread_info_current_unchecked ();
3053 MONO_ARCH_CONTEXT_DEF
3055 mono_arch_flush_register_windows ();
3057 if (!thread || !thread->jit_data) {
3061 #ifdef MONO_INIT_CONTEXT_FROM_CURRENT
3062 MONO_INIT_CONTEXT_FROM_CURRENT (&ctx->ctx);
3064 MONO_INIT_CONTEXT_FROM_FUNC (&ctx->ctx, mono_thread_state_init_from_current);
3067 ctx->unwind_data [MONO_UNWIND_DATA_DOMAIN] = mono_domain_get ();
3068 ctx->unwind_data [MONO_UNWIND_DATA_LMF] = mono_get_lmf ();
3069 ctx->unwind_data [MONO_UNWIND_DATA_JIT_TLS] = thread->jit_data;
3075 mono_raise_exception_with_ctx (MonoException *exc, MonoContext *ctx)
3077 mono_handle_exception (ctx, (MonoObject *)exc);
3078 mono_restore_context (ctx);
3081 /*FIXME Move all monoctx -> sigctx conversion to signal handlers once all archs support utils/mono-context */
3083 mono_setup_async_callback (MonoContext *ctx, void (*async_cb)(void *fun), gpointer user_data)
3085 #ifdef MONO_ARCH_HAVE_SETUP_ASYNC_CALLBACK
3086 MonoJitTlsData *jit_tls = (MonoJitTlsData *)mono_tls_get_jit_tls ();
3087 jit_tls->ex_ctx = *ctx;
3089 mono_arch_setup_async_callback (ctx, async_cb, user_data);
3091 g_error ("This target doesn't support mono_arch_setup_async_callback");
3096 * mono_restore_context:
3098 * Call the architecture specific restore context function.
3101 mono_restore_context (MonoContext *ctx)
3103 static void (*restore_context) (MonoContext *);
3105 if (!restore_context)
3106 restore_context = (void (*)(MonoContext *))mono_get_restore_context ();
3107 restore_context (ctx);
3108 g_assert_not_reached ();
3112 * mono_jinfo_get_unwind_info:
3114 * Return the unwind info for JI.
3117 mono_jinfo_get_unwind_info (MonoJitInfo *ji, guint32 *unwind_info_len)
3119 if (ji->has_unwind_info) {
3120 /* The address/length in the MonoJitInfo structure itself */
3121 MonoUnwindJitInfo *info = mono_jit_info_get_unwind_info (ji);
3122 *unwind_info_len = info->unw_info_len;
3123 return info->unw_info;
3124 } else if (ji->from_aot)
3125 return mono_aot_get_unwind_info (ji, unwind_info_len);
3127 return mono_get_cached_unwind_info (ji->unwind_info, unwind_info_len);
3131 mono_jinfo_get_epilog_size (MonoJitInfo *ji)
3133 MonoArchEHJitInfo *info;
3135 info = mono_jit_info_get_arch_eh_info (ji);
3138 return info->epilog_size;
3142 * LLVM/Bitcode exception handling.
3146 throw_exception (MonoObject *ex, gboolean rethrow)
3148 MONO_REQ_GC_UNSAFE_MODE;
3151 MonoJitTlsData *jit_tls = mono_get_jit_tls ();
3152 MonoException *mono_ex;
3154 if (!mono_object_isinst_checked (ex, mono_defaults.exception_class, &error)) {
3155 mono_error_assert_ok (&error);
3156 mono_ex = mono_get_exception_runtime_wrapped_checked (ex, &error);
3157 mono_error_assert_ok (&error);
3158 jit_tls->thrown_non_exc = mono_gchandle_new (ex, FALSE);
3161 mono_ex = (MonoException*)ex;
3164 jit_tls->thrown_exc = mono_gchandle_new ((MonoObject*)mono_ex, FALSE);
3167 #ifdef MONO_ARCH_HAVE_UNWIND_BACKTRACE
3168 GList *l, *ips = NULL;
3171 _Unwind_Backtrace (build_stack_trace, &ips);
3172 /* The list contains ip-gshared info pairs */
3174 ips = g_list_reverse (ips);
3175 for (l = ips; l; l = l->next) {
3176 trace = g_list_append (trace, l->data);
3177 trace = g_list_append (trace, NULL);
3179 MonoArray *ips_arr = mono_glist_to_array (trace, mono_defaults.int_class, &error);
3180 mono_error_assert_ok (&error);
3181 MONO_OBJECT_SETREF (mono_ex, trace_ips, ips_arr);
3183 g_list_free (trace);
3187 mono_llvm_cpp_throw_exception ();
3191 mono_llvm_throw_exception (MonoObject *ex)
3193 throw_exception (ex, FALSE);
3197 mono_llvm_rethrow_exception (MonoObject *ex)
3199 throw_exception (ex, TRUE);
3203 mono_llvm_raise_exception (MonoException *e)
3205 mono_llvm_throw_exception ((MonoObject*)e);
3209 mono_llvm_throw_corlib_exception (guint32 ex_token_index)
3211 guint32 ex_token = MONO_TOKEN_TYPE_DEF | ex_token_index;
3214 ex = mono_exception_from_token (mono_defaults.exception_class->image, ex_token);
3216 mono_llvm_throw_exception ((MonoObject*)ex);
3220 * mono_llvm_resume_exception:
3222 * Resume exception propagation.
3225 mono_llvm_resume_exception (void)
3227 mono_llvm_cpp_throw_exception ();
3231 * mono_llvm_load_exception:
3233 * Return the currently thrown exception.
3236 mono_llvm_load_exception (void)
3239 MonoJitTlsData *jit_tls = mono_get_jit_tls ();
3241 MonoException *mono_ex = (MonoException*)mono_gchandle_get_target (jit_tls->thrown_exc);
3243 if (mono_ex->trace_ips) {
3244 GList *trace_ips = NULL;
3245 gpointer ip = __builtin_return_address (0);
3247 size_t upper = mono_array_length (mono_ex->trace_ips);
3249 for (int i = 0; i < upper; i+= 2) {
3250 gpointer curr_ip = mono_array_get (mono_ex->trace_ips, gpointer, i);
3251 gpointer curr_info = mono_array_get (mono_ex->trace_ips, gpointer, i + 1);
3252 trace_ips = g_list_append (trace_ips, curr_ip);
3253 trace_ips = g_list_append (trace_ips, curr_info);
3259 // FIXME: Does this work correctly for rethrows?
3260 // We may be discarding useful information
3261 // when this gets GC'ed
3262 MonoArray *ips_arr = mono_glist_to_array (trace_ips, mono_defaults.int_class, &error);
3263 mono_error_assert_ok (&error);
3264 MONO_OBJECT_SETREF (mono_ex, trace_ips, ips_arr);
3265 g_list_free (trace_ips);
3268 //MONO_OBJECT_SETREF (mono_ex, stack_trace, ves_icall_System_Exception_get_trace (mono_ex));
3270 MONO_OBJECT_SETREF (mono_ex, trace_ips, mono_array_new_checked (mono_domain_get (), mono_defaults.int_class, 0, &error));
3271 mono_error_assert_ok (&error);
3272 MONO_OBJECT_SETREF (mono_ex, stack_trace, mono_array_new_checked (mono_domain_get (), mono_defaults.stack_frame_class, 0, &error));
3273 mono_error_assert_ok (&error);
3276 return &mono_ex->object;
3280 * mono_llvm_clear_exception:
3282 * Mark the currently thrown exception as handled.
3285 mono_llvm_clear_exception (void)
3287 MonoJitTlsData *jit_tls = mono_get_jit_tls ();
3288 mono_gchandle_free (jit_tls->thrown_exc);
3289 jit_tls->thrown_exc = 0;
3290 if (jit_tls->thrown_non_exc)
3291 mono_gchandle_free (jit_tls->thrown_non_exc);
3292 jit_tls->thrown_non_exc = 0;
3294 mono_memory_barrier ();
3298 * mono_llvm_match_exception:
3300 * Return the innermost clause containing REGION_START-REGION_END which can handle
3301 * the current exception.
3304 mono_llvm_match_exception (MonoJitInfo *jinfo, guint32 region_start, guint32 region_end, gpointer rgctx, MonoObject *this_obj)
3307 MonoJitTlsData *jit_tls = mono_get_jit_tls ();
3311 g_assert (jit_tls->thrown_exc);
3312 exc = mono_gchandle_get_target (jit_tls->thrown_exc);
3313 if (jit_tls->thrown_non_exc) {
3315 * Have to unwrap RuntimeWrappedExceptions if the
3316 * method's assembly doesn't have a RuntimeCompatibilityAttribute.
3318 if (!wrap_non_exception_throws (jinfo_get_method (jinfo)))
3319 exc = mono_gchandle_get_target (jit_tls->thrown_non_exc);
3322 for (int i = 0; i < jinfo->num_clauses; i++) {
3323 MonoJitExceptionInfo *ei = &jinfo->clauses [i];
3324 MonoClass *catch_class;
3326 if (! (ei->try_offset == region_start && ei->try_offset + ei->try_len == region_end) )
3329 catch_class = ei->data.catch_class;
3330 if (mono_class_is_open_constructed_type (&catch_class->byval_arg)) {
3331 MonoGenericContext context;
3332 MonoType *inflated_type;
3334 g_assert (rgctx || this_obj);
3335 context = get_generic_context_from_stack_frame (jinfo, rgctx ? rgctx : this_obj->vtable);
3336 inflated_type = mono_class_inflate_generic_type_checked (&catch_class->byval_arg, &context, &error);
3337 mono_error_assert_ok (&error); /* FIXME don't swallow the error */
3339 catch_class = mono_class_from_mono_type (inflated_type);
3340 mono_metadata_free_type (inflated_type);
3343 // FIXME: Handle edge cases handled in get_exception_catch_class
3344 if (ei->flags == MONO_EXCEPTION_CLAUSE_NONE && mono_object_isinst_checked (exc, catch_class, &error)) {
3345 index = ei->clause_index;
3348 mono_error_assert_ok (&error);
3350 if (ei->flags == MONO_EXCEPTION_CLAUSE_FILTER) {
3351 g_assert_not_reached ();
3360 mono_debug_personality (int a, _Unwind_Action b,
3361 uint64_t c, struct _Unwind_Exception *d, struct _Unwind_Context *e)
3363 g_assert_not_reached ();
3367 mono_debug_personality (void);
3370 mono_debug_personality (void)
3372 g_assert_not_reached ();
3376 #ifndef ENABLE_INTERPRETER
3377 /* Stubs of interpreter functions */
3379 mono_interp_set_resume_state (MonoException *ex, StackFrameInfo *frame, gpointer handler_ip)
3381 g_assert_not_reached ();
3385 mono_interp_run_finally (StackFrameInfo *frame, int clause_index, gpointer handler_ip)
3387 g_assert_not_reached ();
3391 mono_interp_frame_iter_init (MonoInterpStackIter *iter, gpointer interp_exit_data)
3393 g_assert_not_reached ();
3397 mono_interp_frame_iter_next (MonoInterpStackIter *iter, StackFrameInfo *frame)
3399 g_assert_not_reached ();