2 * mini-exceptions.c: generic exception support
5 * Dietmar Maurer (dietmar@ximian.com)
6 * Mono Team (mono-list@lists.ximian.com)
8 * Copyright 2001-2003 Ximian, Inc.
9 * Copyright 2003-2008 Novell, Inc.
10 * Copyright 2011 Xamarin Inc (http://www.xamarin.com).
18 #ifdef HAVE_EXECINFO_H
22 #ifdef HAVE_SYS_TYPES_H
23 #include <sys/types.h>
26 #ifdef HAVE_SYS_WAIT_H
34 #ifdef HAVE_SYS_SYSCALL_H
35 #include <sys/syscall.h>
38 #include <mono/metadata/appdomain.h>
39 #include <mono/metadata/tabledefs.h>
40 #include <mono/metadata/threads.h>
41 #include <mono/metadata/threads-types.h>
42 #include <mono/metadata/debug-helpers.h>
43 #include <mono/metadata/exception.h>
44 #include <mono/metadata/gc-internal.h>
45 #include <mono/metadata/mono-debug.h>
46 #include <mono/metadata/profiler.h>
47 #include <mono/metadata/mono-endian.h>
48 #include <mono/metadata/environment.h>
49 #include <mono/utils/mono-mmap.h>
50 #include <mono/utils/mono-logger-internal.h>
54 #include "debugger-agent.h"
56 #ifndef MONO_ARCH_CONTEXT_DEF
57 #define MONO_ARCH_CONTEXT_DEF
60 static gpointer restore_context_func, call_filter_func;
61 static gpointer throw_exception_func, rethrow_exception_func;
62 static gpointer throw_corlib_exception_func;
64 static gpointer try_more_restore_tramp = NULL;
65 static gpointer restore_stack_protection_tramp = NULL;
67 static MonoUnhandledExceptionFunc unhandled_exception_hook = NULL;
68 static gpointer unhandled_exception_hook_data = NULL;
70 static void try_more_restore (void);
71 static void restore_stack_protection (void);
72 static void mono_walk_stack_full (MonoJitStackWalk func, MonoContext *start_ctx, MonoDomain *domain, MonoJitTlsData *jit_tls, MonoLMF *lmf, MonoUnwindOptions unwind_options, gpointer user_data);
73 static void mono_raise_exception_with_ctx (MonoException *exc, MonoContext *ctx);
74 static void mono_runtime_walk_stack_with_ctx (MonoJitStackWalk func, MonoContext *start_ctx, MonoUnwindOptions unwind_options, void *user_data);
77 mono_exceptions_init (void)
79 MonoRuntimeExceptionHandlingCallbacks cbs;
81 restore_context_func = mono_aot_get_trampoline ("restore_context");
82 call_filter_func = mono_aot_get_trampoline ("call_filter");
83 throw_exception_func = mono_aot_get_trampoline ("throw_exception");
84 rethrow_exception_func = mono_aot_get_trampoline ("rethrow_exception");
88 restore_context_func = mono_arch_get_restore_context (&info, FALSE);
89 mono_tramp_info_register (info);
90 call_filter_func = mono_arch_get_call_filter (&info, FALSE);
91 mono_tramp_info_register (info);
92 throw_exception_func = mono_arch_get_throw_exception (&info, FALSE);
93 mono_tramp_info_register (info);
94 rethrow_exception_func = mono_arch_get_rethrow_exception (&info, FALSE);
95 mono_tramp_info_register (info);
97 #ifdef MONO_ARCH_HAVE_RESTORE_STACK_SUPPORT
98 try_more_restore_tramp = mono_create_specific_trampoline (try_more_restore, MONO_TRAMPOLINE_RESTORE_STACK_PROT, mono_domain_get (), NULL);
99 restore_stack_protection_tramp = mono_create_specific_trampoline (restore_stack_protection, MONO_TRAMPOLINE_RESTORE_STACK_PROT, mono_domain_get (), NULL);
102 #ifdef MONO_ARCH_HAVE_EXCEPTIONS_INIT
103 mono_arch_exceptions_init ();
105 cbs.mono_walk_stack_with_ctx = mono_runtime_walk_stack_with_ctx;
106 cbs.mono_walk_stack_with_state = mono_walk_stack_with_state;
107 cbs.mono_raise_exception = mono_get_throw_exception ();
108 cbs.mono_raise_exception_with_ctx = mono_raise_exception_with_ctx;
109 cbs.mono_exception_walk_trace = mono_exception_walk_trace;
110 cbs.mono_install_handler_block_guard = mono_install_handler_block_guard;
111 mono_install_eh_callbacks (&cbs);
115 mono_get_throw_exception (void)
117 g_assert (throw_exception_func);
118 return throw_exception_func;
122 mono_get_rethrow_exception (void)
124 g_assert (rethrow_exception_func);
125 return rethrow_exception_func;
129 mono_get_call_filter (void)
131 g_assert (call_filter_func);
132 return call_filter_func;
136 mono_get_restore_context (void)
138 g_assert (restore_context_func);
139 return restore_context_func;
143 mono_get_throw_corlib_exception (void)
145 gpointer code = NULL;
148 /* This depends on corlib classes so cannot be inited in mono_exceptions_init () */
149 if (throw_corlib_exception_func)
150 return throw_corlib_exception_func;
153 code = mono_aot_get_trampoline ("throw_corlib_exception");
155 code = mono_arch_get_throw_corlib_exception (&info, FALSE);
156 mono_tramp_info_register (info);
159 mono_memory_barrier ();
161 throw_corlib_exception_func = code;
163 return throw_corlib_exception_func;
167 is_address_protected (MonoJitInfo *ji, MonoJitExceptionInfo *ei, gpointer ip)
169 MonoTryBlockHoleTableJitInfo *table;
174 if (ei->try_start > ip || ip >= ei->try_end)
177 if (!ji->has_try_block_holes)
180 table = mono_jit_info_get_try_block_hole_table_info (ji);
181 offset = (guint32)((char*)ip - (char*)ji->code_start);
182 clause = (guint16)(ei - ji->clauses);
183 g_assert (clause < ji->num_clauses);
185 for (i = 0; i < table->num_holes; ++i) {
186 MonoTryBlockHoleJitInfo *hole = &table->holes [i];
187 if (hole->clause == clause && hole->offset <= offset && hole->offset + hole->length > offset)
196 * Translate between the mono_arch_find_jit_info function and the old API.
199 find_jit_info (MonoDomain *domain, MonoJitTlsData *jit_tls, MonoJitInfo *res, MonoJitInfo *prev_ji, MonoContext *ctx,
200 MonoContext *new_ctx, MonoLMF **lmf, gboolean *managed)
202 StackFrameInfo frame;
205 gpointer ip = MONO_CONTEXT_GET_IP (ctx);
207 /* Avoid costly table lookup during stack overflow */
208 if (prev_ji && (ip > prev_ji->code_start && ((guint8*)ip < ((guint8*)prev_ji->code_start) + prev_ji->code_size)))
211 ji = mini_jit_info_table_find (domain, ip, NULL);
216 err = mono_arch_find_jit_info (domain, jit_tls, ji, ctx, new_ctx, lmf, NULL, &frame);
220 /* Convert between the new and the old APIs */
221 switch (frame.type) {
222 case FRAME_TYPE_MANAGED:
226 case FRAME_TYPE_MANAGED_TO_NATIVE:
230 memset (res, 0, sizeof (MonoJitInfo));
231 res->d.method = frame.method;
234 case FRAME_TYPE_DEBUGGER_INVOKE: {
238 * The normal exception handling code can't handle this frame, so just
241 ji = find_jit_info (domain, jit_tls, res, NULL, new_ctx, &tmp_ctx, lmf, managed);
242 memcpy (new_ctx, &tmp_ctx, sizeof (MonoContext));
246 g_assert_not_reached ();
251 /* mono_find_jit_info:
253 * This function is used to gather information from @ctx. It return the
254 * MonoJitInfo of the corresponding function, unwinds one stack frame and
255 * stores the resulting context into @new_ctx. It also stores a string
256 * describing the stack location into @trace (if not NULL), and modifies
257 * the @lmf if necessary. @native_offset return the IP offset from the
258 * start of the function or -1 if that info is not available.
261 mono_find_jit_info (MonoDomain *domain, MonoJitTlsData *jit_tls, MonoJitInfo *res, MonoJitInfo *prev_ji, MonoContext *ctx,
262 MonoContext *new_ctx, char **trace, MonoLMF **lmf, int *native_offset,
266 gpointer ip = MONO_CONTEXT_GET_IP (ctx);
268 MonoMethod *method = NULL;
279 ji = find_jit_info (domain, jit_tls, res, prev_ji, ctx, new_ctx, lmf, &managed2);
281 if (ji == (gpointer)-1)
285 method = jinfo_get_method (ji);
287 if (managed2 || (ji && method->wrapper_type)) {
288 const char *real_ip, *start;
291 start = (const char *)ji->code_start;
293 /* ctx->ip points into native code */
294 real_ip = (const char*)MONO_CONTEXT_GET_IP (new_ctx);
296 real_ip = (const char*)ip;
298 if ((real_ip >= start) && (real_ip <= start + ji->code_size))
299 offset = real_ip - start;
304 *native_offset = offset;
307 if (!method->wrapper_type || method->wrapper_type == MONO_WRAPPER_DYNAMIC_METHOD)
311 *trace = mono_debug_print_stack_frame (method, offset, domain);
314 char *fname = mono_method_full_name (jinfo_get_method (res), TRUE);
315 *trace = g_strdup_printf ("in (unmanaged) %s", fname);
324 * mono_find_jit_info_ext:
326 * A version of mono_find_jit_info which returns all data in the StackFrameInfo
328 * A note about frames of type FRAME_TYPE_MANAGED_TO_NATIVE:
329 * - These frames are used to mark managed-to-native transitions, so CTX will refer to native
330 * code, and new_ctx will refer to the last managed frame. The caller should unwind once more
331 * to obtain the last managed frame.
332 * If SAVE_LOCATIONS is not NULL, it should point to an array of size MONO_MAX_IREGS.
333 * On return, it will be filled with the locations where callee saved registers are saved
334 * by the current frame. This is returned outside of StackFrameInfo because it can be
335 * quite large on some platforms.
336 * If ASYNC true, this function will be async safe, but some fields of frame and frame->ji will
340 mono_find_jit_info_ext (MonoDomain *domain, MonoJitTlsData *jit_tls,
341 MonoJitInfo *prev_ji, MonoContext *ctx,
342 MonoContext *new_ctx, char **trace, MonoLMF **lmf,
343 mgreg_t **save_locations,
344 StackFrameInfo *frame)
347 gpointer ip = MONO_CONTEXT_GET_IP (ctx);
349 MonoDomain *target_domain = domain;
350 MonoMethod *method = NULL;
351 gboolean async = mono_thread_info_is_async_context ();
356 /* Avoid costly table lookup during stack overflow */
357 if (prev_ji && (ip > prev_ji->code_start && ((guint8*)ip < ((guint8*)prev_ji->code_start) + prev_ji->code_size)))
360 ji = mini_jit_info_table_find (domain, ip, &target_domain);
363 target_domain = domain;
366 memset (save_locations, 0, MONO_MAX_IREGS * sizeof (mgreg_t*));
368 err = mono_arch_find_jit_info (target_domain, jit_tls, ji, ctx, new_ctx, lmf, save_locations, frame);
372 if (frame->ji && !frame->ji->async)
373 method = jinfo_get_method (frame->ji);
375 if (frame->type == FRAME_TYPE_MANAGED && method) {
376 if (!method->wrapper_type || method->wrapper_type == MONO_WRAPPER_DYNAMIC_METHOD)
377 frame->managed = TRUE;
380 if (frame->type == FRAME_TYPE_MANAGED_TO_NATIVE) {
382 * This type of frame is just a marker, the caller should unwind once more to get the
383 * last managed frame.
386 frame->method = NULL;
389 frame->native_offset = -1;
390 frame->domain = target_domain;
391 frame->async_context = async;
395 if (frame->type == FRAME_TYPE_MANAGED)
396 frame->method = method;
398 if (ji && (frame->managed || (method && method->wrapper_type))) {
399 const char *real_ip, *start;
401 start = (const char *)ji->code_start;
403 /* ctx->ip points into native code */
404 real_ip = (const char*)MONO_CONTEXT_GET_IP (new_ctx);
406 real_ip = (const char*)ip;
408 if ((real_ip >= start) && (real_ip <= start + ji->code_size))
409 frame->native_offset = real_ip - start;
411 frame->native_offset = -1;
414 *trace = mono_debug_print_stack_frame (method, frame->native_offset, domain);
416 if (trace && frame->method) {
417 char *fname = mono_method_full_name (frame->method, TRUE);
418 *trace = g_strdup_printf ("in (unmanaged) %s", fname);
427 get_generic_info_from_stack_frame (MonoJitInfo *ji, MonoContext *ctx)
429 MonoGenericJitInfo *gi;
433 if (!ji->has_generic_jit_info)
435 gi = mono_jit_info_get_generic_jit_info (ji);
441 * Search location list if available, it contains the precise location of the
442 * argument for every pc offset, even if the method was interrupted while it was in
446 int offset = (mgreg_t)MONO_CONTEXT_GET_IP (ctx) - (mgreg_t)ji->code_start;
449 for (i = 0; i < gi->nlocs; ++i) {
450 MonoDwarfLocListEntry *entry = &gi->locations [i];
452 if (offset >= entry->from && (offset < entry->to || entry->to == 0)) {
454 info = (gpointer)mono_arch_context_get_int_reg (ctx, entry->reg);
456 info = *(gpointer*)(gpointer)((char*)mono_arch_context_get_int_reg (ctx, entry->reg) + entry->offset);
460 g_assert (i < gi->nlocs);
463 info = (gpointer)mono_arch_context_get_int_reg (ctx, gi->this_reg);
465 info = *(gpointer*)(gpointer)((char*)mono_arch_context_get_int_reg (ctx, gi->this_reg) +
469 method = jinfo_get_method (ji);
470 if (mono_method_get_context (method)->method_inst) {
472 } else if ((method->flags & METHOD_ATTRIBUTE_STATIC) || method->klass->valuetype) {
475 /* Avoid returning a managed object */
476 MonoObject *this_obj = info;
478 return this_obj->vtable->klass;
482 static MonoGenericContext
483 get_generic_context_from_stack_frame (MonoJitInfo *ji, gpointer generic_info)
485 MonoGenericContext context = { NULL, NULL };
486 MonoClass *class, *method_container_class;
489 g_assert (generic_info);
491 method = jinfo_get_method (ji);
492 g_assert (method->is_inflated);
493 if (mono_method_get_context (method)->method_inst) {
494 MonoMethodRuntimeGenericContext *mrgctx = generic_info;
496 class = mrgctx->class_vtable->klass;
497 context.method_inst = mrgctx->method_inst;
498 g_assert (context.method_inst);
499 } else if ((method->flags & METHOD_ATTRIBUTE_STATIC) || method->klass->valuetype) {
500 MonoVTable *vtable = generic_info;
502 class = vtable->klass;
504 class = generic_info;
507 //g_assert (!method->klass->generic_container);
508 if (method->klass->generic_class)
509 method_container_class = method->klass->generic_class->container_class;
511 method_container_class = method->klass;
513 /* class might refer to a subclass of method's class */
514 while (!(class == method->klass || (class->generic_class && class->generic_class->container_class == method_container_class))) {
515 class = class->parent;
519 if (class->generic_class || class->generic_container)
520 context.class_inst = mini_class_get_context (class)->class_inst;
522 if (class->generic_class)
523 g_assert (mono_class_has_parent_and_ignore_generics (class->generic_class->container_class, method_container_class));
525 g_assert (mono_class_has_parent_and_ignore_generics (class, method_container_class));
531 get_method_from_stack_frame (MonoJitInfo *ji, gpointer generic_info)
533 MonoGenericContext context;
536 if (!ji->has_generic_jit_info || !mono_jit_info_get_generic_jit_info (ji)->has_this)
537 return jinfo_get_method (ji);
538 context = get_generic_context_from_stack_frame (ji, generic_info);
540 method = jinfo_get_method (ji);
541 method = mono_method_get_declaring_generic_method (method);
542 method = mono_class_inflate_generic_method (method, &context);
548 * mono_exception_walk_native_trace:
549 * @ex: The exception object whose frames should be walked
550 * @func: callback to call for each stack frame
551 * @user_data: data passed to the callback
553 * This function walks the stacktrace of an exception. For
554 * each frame the callback function is called with the relevant info.
555 * The walk ends when no more stack frames are found or when the callback
556 * returns a TRUE value.
560 mono_exception_walk_trace (MonoException *ex, MonoExceptionFrameWalk func, gpointer user_data)
562 MonoDomain *domain = mono_domain_get ();
563 MonoArray *ta = ex->trace_ips;
569 len = mono_array_length (ta) >> 1;
570 for (i = 0; i < len; i++) {
571 gpointer ip = mono_array_get (ta, gpointer, i * 2 + 0);
572 gpointer generic_info = mono_array_get (ta, gpointer, i * 2 + 1);
573 MonoJitInfo *ji = mono_jit_info_table_find (domain, ip);
576 if (func (NULL, ip, 0, FALSE, user_data))
579 MonoMethod *method = get_method_from_stack_frame (ji, generic_info);
580 if (func (method, ji->code_start, (char *) ip - (char *) ji->code_start, TRUE, user_data))
589 ves_icall_System_Exception_get_trace (MonoException *ex)
591 MonoDomain *domain = mono_domain_get ();
593 MonoArray *ta = ex->trace_ips;
598 /* Exception is not thrown yet */
601 len = mono_array_length (ta) >> 1;
602 trace_str = g_string_new ("");
603 for (i = 0; i < len; i++) {
605 gpointer ip = mono_array_get (ta, gpointer, i * 2 + 0);
606 gpointer generic_info = mono_array_get (ta, gpointer, i * 2 + 1);
608 ji = mono_jit_info_table_find (domain, ip);
610 /* Unmanaged frame */
611 g_string_append_printf (trace_str, "in (unmanaged) %p\n", ip);
615 MonoMethod *method = get_method_from_stack_frame (ji, generic_info);
617 address = (char *)ip - (char *)ji->code_start;
618 location = mono_debug_print_stack_frame (
619 method, address, ex->object.vtable->domain);
621 g_string_append_printf (trace_str, "%s\n", location);
626 res = mono_string_new (ex->object.vtable->domain, trace_str->str);
627 g_string_free (trace_str, TRUE);
633 ves_icall_get_trace (MonoException *exc, gint32 skip, MonoBoolean need_file_info)
635 MonoDomain *domain = mono_domain_get ();
637 MonoArray *ta = exc->trace_ips;
638 MonoDebugSourceLocation *location;
642 /* Exception is not thrown yet */
643 return mono_array_new (domain, mono_defaults.stack_frame_class, 0);
646 len = mono_array_length (ta) >> 1;
648 res = mono_array_new (domain, mono_defaults.stack_frame_class, len > skip ? len - skip : 0);
650 for (i = skip; i < len; i++) {
652 MonoStackFrame *sf = (MonoStackFrame *)mono_object_new (domain, mono_defaults.stack_frame_class);
653 gpointer ip = mono_array_get (ta, gpointer, i * 2 + 0);
654 gpointer generic_info = mono_array_get (ta, gpointer, i * 2 + 1);
657 ji = mono_jit_info_table_find (domain, ip);
659 /* Unmanaged frame */
660 mono_array_setref (res, i, sf);
664 g_assert (ji != NULL);
666 method = get_method_from_stack_frame (ji, generic_info);
667 if (jinfo_get_method (ji)->wrapper_type) {
671 s = mono_method_full_name (method, TRUE);
672 MONO_OBJECT_SETREF (sf, internal_method_name, mono_string_new (domain, s));
676 MONO_OBJECT_SETREF (sf, method, mono_method_get_object (domain, method, NULL));
677 sf->native_offset = (char *)ip - (char *)ji->code_start;
680 * mono_debug_lookup_source_location() returns both the file / line number information
681 * and the IL offset. Note that computing the IL offset is already an expensive
682 * operation, so we shouldn't call this method twice.
684 location = mono_debug_lookup_source_location (jinfo_get_method (ji), sf->native_offset, domain);
686 sf->il_offset = location->il_offset;
690 if (need_file_info) {
691 if (location && location->source_file) {
692 MONO_OBJECT_SETREF (sf, filename, mono_string_new (domain, location->source_file));
693 sf->line = location->row;
694 sf->column = location->column;
696 sf->line = sf->column = 0;
701 mono_debug_free_source_location (location);
702 mono_array_setref (res, i, sf);
709 mono_runtime_walk_stack_with_ctx (MonoJitStackWalk func, MonoContext *start_ctx, MonoUnwindOptions unwind_options, void *user_data)
712 MonoJitTlsData *jit_tls = mono_native_tls_get_value (mono_jit_tls_id);
713 if (jit_tls && jit_tls->orig_ex_ctx_set)
714 start_ctx = &jit_tls->orig_ex_ctx;
716 mono_walk_stack_with_ctx (func, start_ctx, unwind_options, user_data);
719 * mono_walk_stack_with_ctx:
721 * Unwind the current thread starting at @start_ctx.
723 * If @start_ctx is null, we capture the current context.
726 mono_walk_stack_with_ctx (MonoJitStackWalk func, MonoContext *start_ctx, MonoUnwindOptions unwind_options, void *user_data)
728 MonoContext extra_ctx;
729 MonoInternalThread *thread = mono_thread_internal_current ();
730 MONO_ARCH_CONTEXT_DEF
732 if (!thread || !thread->jit_data)
736 mono_arch_flush_register_windows ();
738 #ifdef MONO_INIT_CONTEXT_FROM_CURRENT
739 MONO_INIT_CONTEXT_FROM_CURRENT (&extra_ctx);
741 MONO_INIT_CONTEXT_FROM_FUNC (&extra_ctx, mono_walk_stack_with_ctx);
743 start_ctx = &extra_ctx;
746 mono_walk_stack_full (func, start_ctx, mono_domain_get (), thread->jit_data, mono_get_lmf (), unwind_options, user_data);
750 * mono_walk_stack_with_state:
752 * Unwind a thread described by @state.
754 * State must be valid (state->valid == TRUE).
756 * If you are using this function to unwind another thread, make sure it is suspended.
758 * If @state is null, we capture the current context.
761 mono_walk_stack_with_state (MonoJitStackWalk func, MonoThreadUnwindState *state, MonoUnwindOptions unwind_options, void *user_data)
763 MonoThreadUnwindState extra_state;
765 g_assert (!mono_thread_info_is_async_context ());
766 if (!mono_thread_state_init_from_current (&extra_state))
768 state = &extra_state;
771 g_assert (state->valid);
773 mono_walk_stack_full (func,
775 state->unwind_data [MONO_UNWIND_DATA_DOMAIN],
776 state->unwind_data [MONO_UNWIND_DATA_JIT_TLS],
777 state->unwind_data [MONO_UNWIND_DATA_LMF],
778 unwind_options, user_data);
782 mono_walk_stack (MonoJitStackWalk func, MonoUnwindOptions options, void *user_data)
784 MonoThreadUnwindState state;
785 if (!mono_thread_state_init_from_current (&state))
787 mono_walk_stack_with_state (func, &state, options, user_data);
791 * mono_walk_stack_full:
792 * @func: callback to call for each stack frame
793 * @domain: starting appdomain, can be NULL to use the current domain
794 * @unwind_options: what extra information the unwinder should gather
795 * @start_ctx: starting state of the stack walk, can be NULL.
796 * @thread: the thread whose stack to walk, can be NULL to use the current thread
797 * @lmf: the LMF of @thread, can be NULL to use the LMF of the current thread
798 * @user_data: data passed to the callback
800 * This function walks the stack of a thread, starting from the state
801 * represented by start_ctx. For each frame the callback
802 * function is called with the relevant info. The walk ends when no more
803 * managed stack frames are found or when the callback returns a TRUE value.
806 mono_walk_stack_full (MonoJitStackWalk func, MonoContext *start_ctx, MonoDomain *domain, MonoJitTlsData *jit_tls, MonoLMF *lmf, MonoUnwindOptions unwind_options, gpointer user_data)
809 MonoContext ctx, new_ctx;
810 StackFrameInfo frame;
812 mgreg_t *reg_locations [MONO_MAX_IREGS];
813 mgreg_t *new_reg_locations [MONO_MAX_IREGS];
814 gboolean get_reg_locations = unwind_options & MONO_UNWIND_REG_LOCATIONS;
815 gboolean async = mono_thread_info_is_async_context ();
817 g_assert (start_ctx);
820 /*The LMF will be null if the target have no managed frames.*/
821 /* g_assert (lmf); */
824 g_assert (unwind_options == MONO_UNWIND_NONE);
826 memcpy (&ctx, start_ctx, sizeof (MonoContext));
827 memset (reg_locations, 0, sizeof (reg_locations));
829 while (MONO_CONTEXT_GET_SP (&ctx) < jit_tls->end_of_stack) {
831 res = mono_find_jit_info_ext (domain, jit_tls, NULL, &ctx, &new_ctx, NULL, &lmf, get_reg_locations ? new_reg_locations : NULL, &frame);
835 if ((unwind_options & MONO_UNWIND_LOOKUP_IL_OFFSET) && frame.ji) {
836 MonoDebugSourceLocation *source;
838 source = mono_debug_lookup_source_location (jinfo_get_method (frame.ji), frame.native_offset, domain);
839 il_offset = source ? source->il_offset : -1;
840 mono_debug_free_source_location (source);
844 frame.il_offset = il_offset;
846 if ((unwind_options & MONO_UNWIND_LOOKUP_ACTUAL_METHOD) && frame.ji) {
847 frame.actual_method = get_method_from_stack_frame (frame.ji, get_generic_info_from_stack_frame (frame.ji, &ctx));
849 frame.actual_method = frame.method;
852 if (get_reg_locations)
853 frame.reg_locations = reg_locations;
855 if (func (&frame, &ctx, user_data))
858 if (get_reg_locations) {
859 for (i = 0; i < MONO_MAX_IREGS; ++i)
860 if (new_reg_locations [i])
861 reg_locations [i] = new_reg_locations [i];
869 ves_icall_get_frame_info (gint32 skip, MonoBoolean need_file_info,
870 MonoReflectionMethod **method,
871 gint32 *iloffset, gint32 *native_offset,
872 MonoString **file, gint32 *line, gint32 *column)
874 MonoDomain *domain = mono_domain_get ();
875 MonoJitTlsData *jit_tls = mono_native_tls_get_value (mono_jit_tls_id);
876 MonoLMF *lmf = mono_get_lmf ();
877 MonoJitInfo *ji = NULL;
878 MonoContext ctx, new_ctx;
879 MonoDebugSourceLocation *location;
880 MonoMethod *jmethod = NULL, *actual_method;
881 StackFrameInfo frame;
884 MONO_ARCH_CONTEXT_DEF;
886 mono_arch_flush_register_windows ();
888 #ifdef MONO_INIT_CONTEXT_FROM_CURRENT
889 MONO_INIT_CONTEXT_FROM_CURRENT (&ctx);
891 MONO_INIT_CONTEXT_FROM_FUNC (&ctx, ves_icall_get_frame_info);
897 res = mono_find_jit_info_ext (domain, jit_tls, NULL, &ctx, &new_ctx, NULL, &lmf, NULL, &frame);
901 if (frame.type == FRAME_TYPE_MANAGED_TO_NATIVE || frame.type == FRAME_TYPE_DEBUGGER_INVOKE)
905 *native_offset = frame.native_offset;
907 /* The skip count passed by the caller depends on us not filtering out MANAGED_TO_NATIVE */
908 jmethod = jinfo_get_method (ji);
909 if (jmethod->wrapper_type != MONO_WRAPPER_NONE && jmethod->wrapper_type != MONO_WRAPPER_DYNAMIC_METHOD && jmethod->wrapper_type != MONO_WRAPPER_MANAGED_TO_NATIVE)
914 actual_method = get_method_from_stack_frame (ji, get_generic_info_from_stack_frame (ji, &ctx));
916 mono_gc_wbarrier_generic_store (method, (MonoObject*) mono_method_get_object (domain, actual_method, NULL));
918 location = mono_debug_lookup_source_location (jmethod, *native_offset, domain);
920 *iloffset = location->il_offset;
924 if (need_file_info) {
926 mono_gc_wbarrier_generic_store (file, (MonoObject*) mono_string_new (domain, location->source_file));
927 *line = location->row;
928 *column = location->column;
935 mono_debug_free_source_location (location);
942 MonoSecurityFrame *frame;
943 } MonoFrameSecurityInfo;
946 callback_get_first_frame_security_info (StackFrameInfo *frame, MonoContext *ctx, gpointer data)
948 MonoFrameSecurityInfo *si = (MonoFrameSecurityInfo*) data;
949 MonoJitInfo *ji = frame->ji;
955 /* FIXME: skip all wrappers ?? probably not - case by case testing is required */
956 method = jinfo_get_method (ji);
957 if (method->wrapper_type == MONO_WRAPPER_RUNTIME_INVOKE ||
958 method->wrapper_type == MONO_WRAPPER_XDOMAIN_INVOKE ||
959 method->wrapper_type == MONO_WRAPPER_XDOMAIN_DISPATCH ||
960 method->wrapper_type == MONO_WRAPPER_REMOTING_INVOKE_WITH_CHECK ||
961 method->wrapper_type == MONO_WRAPPER_REMOTING_INVOKE) {
970 si->frame = mono_declsec_create_frame (frame->domain, ji);
972 /* Stop - we only want the first frame (e.g. LinkDemand and InheritanceDemand) */
977 * ves_icall_System_Security_SecurityFrame_GetSecurityFrame:
978 * @skip: the number of stack frames to skip
980 * This function returns a the security informations of a single stack frame
981 * (after the skipped ones). This is required for [NonCas]LinkDemand[Choice]
982 * and [NonCas]InheritanceDemand[Choice] as only the caller security is
986 ves_icall_System_Security_SecurityFrame_GetSecurityFrame (gint32 skip)
988 MonoFrameSecurityInfo si;
993 mono_walk_stack (callback_get_first_frame_security_info, MONO_UNWIND_DEFAULT, &si);
995 return (si.skips == 0) ? si.frame : NULL;
1004 } MonoSecurityStack;
1007 grow_array (MonoSecurityStack *stack)
1009 MonoDomain *domain = mono_domain_get ();
1010 guint32 newsize = (stack->maximum << 1);
1011 MonoArray *newstack = mono_array_new (domain, mono_defaults.runtimesecurityframe_class, newsize);
1013 for (i=0; i < stack->maximum; i++) {
1014 gpointer frame = mono_array_get (stack->stack, gpointer, i);
1015 mono_array_setref (newstack, i, frame);
1017 stack->maximum = newsize;
1018 stack->stack = newstack;
1022 callback_get_stack_frames_security_info (StackFrameInfo *frame, MonoContext *ctx, gpointer data)
1024 MonoSecurityStack *ss = (MonoSecurityStack*) data;
1025 MonoJitInfo *ji = frame->ji;
1031 /* FIXME: skip all wrappers ?? probably not - case by case testing is required */
1032 method = jinfo_get_method (ji);
1033 if (method->wrapper_type == MONO_WRAPPER_RUNTIME_INVOKE ||
1034 method->wrapper_type == MONO_WRAPPER_XDOMAIN_INVOKE ||
1035 method->wrapper_type == MONO_WRAPPER_XDOMAIN_DISPATCH ||
1036 method->wrapper_type == MONO_WRAPPER_REMOTING_INVOKE_WITH_CHECK ||
1037 method->wrapper_type == MONO_WRAPPER_REMOTING_INVOKE) {
1041 if (ss->skips > 0) {
1046 if (ss->count == ss->maximum)
1049 mono_array_setref (ss->stack, ss->count++, mono_declsec_create_frame (frame->domain, ji));
1051 /* continue down the stack */
1056 glist_to_array (GList *list, MonoClass *eclass)
1058 MonoDomain *domain = mono_domain_get ();
1065 len = g_list_length (list);
1066 res = mono_array_new (domain, eclass, len);
1068 for (i = 0; list; list = list->next, i++)
1069 mono_array_set (res, gpointer, i, list->data);
1075 * ves_icall_System_Security_SecurityFrame_GetSecurityStack:
1076 * @skip: the number of stack frames to skip
1078 * This function returns an managed array of containing the security
1079 * informations for each frame (after the skipped ones). This is used for
1080 * [NonCas]Demand[Choice] where the complete evaluation of the stack is
1084 ves_icall_System_Security_SecurityFrame_GetSecurityStack (gint32 skip)
1086 MonoSecurityStack ss;
1088 #if defined(__ia64__) || defined(__s390__) || defined(__s390x__)
1094 ss.maximum = MONO_CAS_INITIAL_STACK_SIZE;
1095 ss.stack = mono_array_new (mono_domain_get (), mono_defaults.runtimesecurityframe_class, ss.maximum);
1096 mono_walk_stack (callback_get_stack_frames_security_info, MONO_UNWIND_DEFAULT, &ss);
1097 /* g_warning ("STACK RESULT: %d out of %d", ss.count, ss.maximum); */
1102 get_exception_catch_class (MonoJitExceptionInfo *ei, MonoJitInfo *ji, MonoContext *ctx)
1104 MonoClass *catch_class = ei->data.catch_class;
1105 MonoType *inflated_type;
1106 MonoGenericContext context;
1108 /*MonoJitExceptionInfo::data is an union used by filter and finally clauses too.*/
1109 if (!catch_class || ei->flags != MONO_EXCEPTION_CLAUSE_NONE)
1112 if (!ji->has_generic_jit_info || !mono_jit_info_get_generic_jit_info (ji)->has_this)
1114 context = get_generic_context_from_stack_frame (ji, get_generic_info_from_stack_frame (ji, ctx));
1116 /* FIXME: we shouldn't inflate but instead put the
1117 type in the rgctx and fetch it from there. It
1118 might be a good idea to do this lazily, i.e. only
1119 when the exception is actually thrown, so as not to
1120 waste space for exception clauses which might never
1122 inflated_type = mono_class_inflate_generic_type (&catch_class->byval_arg, &context);
1123 catch_class = mono_class_from_mono_type (inflated_type);
1124 mono_metadata_free_type (inflated_type);
1130 * mini_jit_info_table_find:
1132 * Same as mono_jit_info_table_find, but search all the domains of the current thread
1133 * if ADDR is not found in DOMAIN. The domain where the method was found is stored into
1134 * OUT_DOMAIN if it is not NULL.
1137 mini_jit_info_table_find (MonoDomain *domain, char *addr, MonoDomain **out_domain)
1140 MonoInternalThread *t = mono_thread_internal_current ();
1146 ji = mono_jit_info_table_find (domain, addr);
1149 *out_domain = domain;
1153 /* maybe it is shared code, so we also search in the root domain */
1154 if (domain != mono_get_root_domain ()) {
1155 ji = mono_jit_info_table_find (mono_get_root_domain (), addr);
1158 *out_domain = mono_get_root_domain ();
1166 refs = (t->appdomain_refs) ? *(gpointer *) t->appdomain_refs : NULL;
1167 for (; refs && *refs; refs++) {
1168 if (*refs != domain && *refs != mono_get_root_domain ()) {
1169 ji = mono_jit_info_table_find ((MonoDomain*) *refs, addr);
1172 *out_domain = (MonoDomain*) *refs;
1182 * wrap_non_exception_throws:
1184 * Determine whenever M's assembly has a RuntimeCompatibilityAttribute with the
1185 * WrapNonExceptionThrows flag set.
1188 wrap_non_exception_throws (MonoMethod *m)
1190 MonoAssembly *ass = m->klass->image->assembly;
1191 MonoCustomAttrInfo* attrs;
1192 static MonoClass *klass;
1194 gboolean val = FALSE;
1197 if (ass->wrap_non_exception_throws_inited)
1198 return ass->wrap_non_exception_throws;
1200 klass = mono_class_from_name_cached (mono_defaults.corlib, "System.Runtime.CompilerServices", "RuntimeCompatibilityAttribute");
1202 attrs = mono_custom_attrs_from_assembly (ass);
1204 for (i = 0; i < attrs->num_attrs; ++i) {
1205 MonoCustomAttrEntry *attr = &attrs->attrs [i];
1207 int len, num_named, named_type, data_type, name_len;
1210 if (!attr->ctor || attr->ctor->klass != klass)
1212 /* Decode the RuntimeCompatibilityAttribute. See reflection.c */
1213 len = attr->data_size;
1214 p = (const char*)attr->data;
1215 g_assert (read16 (p) == 0x0001);
1217 num_named = read16 (p);
1226 if (named_type != 0x54)
1228 name_len = mono_metadata_decode_blob_size (p, &p);
1229 name = g_malloc (name_len + 1);
1230 memcpy (name, p, name_len);
1231 name [name_len] = 0;
1233 g_assert (!strcmp (name, "WrapNonExceptionThrows"));
1235 /* The value is a BOOLEAN */
1238 mono_custom_attrs_free (attrs);
1241 ass->wrap_non_exception_throws = val;
1242 mono_memory_barrier ();
1243 ass->wrap_non_exception_throws_inited = TRUE;
1248 #ifndef MONO_ARCH_STACK_GROWS_UP
1249 #define DOES_STACK_GROWS_UP 1
1251 #define DOES_STACK_GROWS_UP 0
1254 #define MAX_UNMANAGED_BACKTRACE 128
1256 build_native_trace (void)
1258 /* This puppy only makes sense on mobile, IOW, ARM. */
1259 #if defined (HAVE_BACKTRACE_SYMBOLS) && defined (TARGET_ARM)
1261 void *native_trace [MAX_UNMANAGED_BACKTRACE];
1262 int size = backtrace (native_trace, MAX_UNMANAGED_BACKTRACE);
1267 res = mono_array_new (mono_domain_get (), mono_defaults.int_class, size);
1269 for (i = 0; i < size; i++)
1270 mono_array_set (res, gpointer, i, native_trace [i]);
1277 #define setup_managed_stacktrace_information() do { \
1278 if (mono_ex && !initial_trace_ips) { \
1279 trace_ips = g_list_reverse (trace_ips); \
1280 MONO_OBJECT_SETREF (mono_ex, trace_ips, glist_to_array (trace_ips, mono_defaults.int_class)); \
1281 MONO_OBJECT_SETREF (mono_ex, native_trace_ips, build_native_trace ()); \
1282 if (has_dynamic_methods) \
1283 /* These methods could go away anytime, so compute the stack trace now */ \
1284 MONO_OBJECT_SETREF (mono_ex, stack_trace, ves_icall_System_Exception_get_trace (mono_ex)); \
1286 g_list_free (trace_ips); \
1290 * mono_handle_exception_internal_first_pass:
1292 * The first pass of exception handling. Unwind the stack until a catch clause which can catch
1293 * OBJ is found. Run the index of the filter clause which caught the exception into
1294 * OUT_FILTER_IDX. Return TRUE if the exception is caught, FALSE otherwise.
1297 mono_handle_exception_internal_first_pass (MonoContext *ctx, gpointer obj, gint32 *out_filter_idx, MonoJitInfo **out_ji, MonoJitInfo **out_prev_ji, MonoObject *non_exception)
1299 MonoDomain *domain = mono_domain_get ();
1300 MonoJitInfo *ji = NULL;
1301 static int (*call_filter) (MonoContext *, gpointer) = NULL;
1302 MonoJitTlsData *jit_tls = mono_native_tls_get_value (mono_jit_tls_id);
1303 MonoLMF *lmf = mono_get_lmf ();
1304 MonoArray *initial_trace_ips = NULL;
1305 GList *trace_ips = NULL;
1306 MonoException *mono_ex;
1307 gboolean stack_overflow = FALSE;
1308 MonoContext initial_ctx;
1310 int frame_count = 0;
1311 gboolean has_dynamic_methods = FALSE;
1316 g_assert (ctx != NULL);
1318 if (obj == domain->stack_overflow_ex)
1319 stack_overflow = TRUE;
1321 mono_ex = (MonoException*)obj;
1322 initial_trace_ips = mono_ex->trace_ips;
1324 if (mono_object_isinst (obj, mono_defaults.exception_class)) {
1325 mono_ex = (MonoException*)obj;
1326 initial_trace_ips = mono_ex->trace_ips;
1332 call_filter = mono_get_call_filter ();
1334 g_assert (jit_tls->end_of_stack);
1335 g_assert (jit_tls->abort_func);
1338 *out_filter_idx = -1;
1342 *out_prev_ji = NULL;
1347 MonoContext new_ctx;
1349 int clause_index_start = 0;
1350 gboolean unwind_res = TRUE;
1352 StackFrameInfo frame;
1357 unwind_res = mono_find_jit_info_ext (domain, jit_tls, NULL, ctx, &new_ctx, NULL, &lmf, NULL, &frame);
1359 if (frame.type == FRAME_TYPE_DEBUGGER_INVOKE || frame.type == FRAME_TYPE_MANAGED_TO_NATIVE) {
1363 g_assert (frame.type == FRAME_TYPE_MANAGED);
1368 setup_managed_stacktrace_information ();
1373 method = jinfo_get_method (ji);
1374 //printf ("M: %s %d.\n", mono_method_full_name (method, TRUE), frame_count);
1376 if (mini_get_debug_options ()->reverse_pinvoke_exceptions && method->wrapper_type == MONO_WRAPPER_NATIVE_TO_MANAGED) {
1377 g_error ("A native frame was found while unwinding the stack after an exception.\n"
1378 "The native frame called the managed method:\n%s\n",
1379 mono_method_full_name (method, TRUE));
1382 if (method->wrapper_type != MONO_WRAPPER_RUNTIME_INVOKE && mono_ex) {
1384 * Avoid overwriting the stack trace if the exception is
1385 * rethrown. Also avoid giant stack traces during a stack
1388 if (!initial_trace_ips && (frame_count < 1000)) {
1389 trace_ips = g_list_prepend (trace_ips, MONO_CONTEXT_GET_IP (ctx));
1390 trace_ips = g_list_prepend (trace_ips,
1391 get_generic_info_from_stack_frame (ji, ctx));
1395 if (method->dynamic)
1396 has_dynamic_methods = TRUE;
1398 if (stack_overflow) {
1399 if (DOES_STACK_GROWS_UP)
1400 free_stack = (guint8*)(MONO_CONTEXT_GET_SP (ctx)) - (guint8*)(MONO_CONTEXT_GET_SP (&initial_ctx));
1402 free_stack = (guint8*)(MONO_CONTEXT_GET_SP (&initial_ctx)) - (guint8*)(MONO_CONTEXT_GET_SP (ctx));
1404 free_stack = 0xffffff;
1407 for (i = clause_index_start; i < ji->num_clauses; i++) {
1408 MonoJitExceptionInfo *ei = &ji->clauses [i];
1409 gboolean filtered = FALSE;
1412 * During stack overflow, wait till the unwinding frees some stack
1413 * space before running handlers/finalizers.
1415 if (free_stack <= (64 * 1024))
1418 if (is_address_protected (ji, ei, MONO_CONTEXT_GET_IP (ctx))) {
1420 MonoClass *catch_class = get_exception_catch_class (ei, ji, ctx);
1423 * Have to unwrap RuntimeWrappedExceptions if the
1424 * method's assembly doesn't have a RuntimeCompatibilityAttribute.
1426 if (non_exception && !wrap_non_exception_throws (method))
1427 ex_obj = non_exception;
1431 if (ei->flags == MONO_EXCEPTION_CLAUSE_FILTER) {
1432 gboolean is_user_frame = method->wrapper_type == MONO_WRAPPER_NONE || method->wrapper_type == MONO_WRAPPER_DYNAMIC_METHOD;
1433 #ifndef DISABLE_PERFCOUNTERS
1434 mono_perfcounters->exceptions_filters++;
1437 Here's the thing, if this is a filter clause done by a wrapper like runtime invoke, we don't want to
1438 trim the stackframe since if it returns FALSE we lose information.
1440 FIXME Not 100% sure if it's a good idea even with user clauses.
1443 setup_managed_stacktrace_information ();
1445 if (ji->from_llvm) {
1446 #ifdef MONO_CONTEXT_SET_LLVM_EXC_REG
1447 MONO_CONTEXT_SET_LLVM_EXC_REG (ctx, ex_obj);
1449 g_assert_not_reached ();
1452 /* store the exception object in bp + ei->exvar_offset */
1453 *((gpointer *)(gpointer)((char *)MONO_CONTEXT_GET_BP (ctx) + ei->exvar_offset)) = ex_obj;
1456 mono_debugger_agent_begin_exception_filter (mono_ex, ctx, &initial_ctx);
1457 filtered = call_filter (ctx, ei->data.filter);
1458 mono_debugger_agent_end_exception_filter (mono_ex, ctx, &initial_ctx);
1459 if (filtered && out_filter_idx)
1460 *out_filter_idx = filter_idx;
1467 setup_managed_stacktrace_information ();
1468 /* mono_debugger_agent_handle_exception () needs this */
1469 MONO_CONTEXT_SET_IP (ctx, ei->handler_start);
1474 if (ei->flags == MONO_EXCEPTION_CLAUSE_NONE && mono_object_isinst (ex_obj, catch_class)) {
1475 setup_managed_stacktrace_information ();
1480 /* mono_debugger_agent_handle_exception () needs this */
1481 MONO_CONTEXT_SET_IP (ctx, ei->handler_start);
1490 g_assert_not_reached ();
1494 * mono_handle_exception_internal:
1495 * @ctx: saved processor state
1496 * @obj: the exception object
1497 * @resume: whenever to resume unwinding based on the state in MonoJitTlsData.
1500 mono_handle_exception_internal (MonoContext *ctx, gpointer obj, gboolean resume, MonoJitInfo **out_ji)
1502 MonoDomain *domain = mono_domain_get ();
1503 MonoJitInfo *ji, *prev_ji;
1504 static int (*call_filter) (MonoContext *, gpointer) = NULL;
1505 MonoJitTlsData *jit_tls = mono_native_tls_get_value (mono_jit_tls_id);
1506 MonoLMF *lmf = mono_get_lmf ();
1507 MonoException *mono_ex;
1508 gboolean stack_overflow = FALSE;
1509 MonoContext initial_ctx;
1511 int frame_count = 0;
1512 gint32 filter_idx, first_filter_idx = 0;
1515 MonoObject *non_exception = NULL;
1517 g_assert (ctx != NULL);
1519 MonoException *ex = mono_get_exception_null_reference ();
1520 MONO_OBJECT_SETREF (ex, message, mono_string_new (domain, "Object reference not set to an instance of an object"));
1521 obj = (MonoObject *)ex;
1525 * Allocate a new exception object instead of the preconstructed ones.
1527 if (obj == domain->stack_overflow_ex) {
1529 * It is not a good idea to try and put even more pressure on the little stack available.
1530 * obj = mono_get_exception_stack_overflow ();
1532 stack_overflow = TRUE;
1534 else if (obj == domain->null_reference_ex) {
1535 obj = mono_get_exception_null_reference ();
1538 if (!mono_object_isinst (obj, mono_defaults.exception_class)) {
1539 non_exception = obj;
1540 obj = mono_get_exception_runtime_wrapped (obj);
1543 mono_ex = (MonoException*)obj;
1545 if (mono_object_isinst (obj, mono_defaults.exception_class)) {
1546 mono_ex = (MonoException*)obj;
1551 if (mono_ex && jit_tls->class_cast_from) {
1552 if (!strcmp (mono_ex->object.vtable->klass->name, "InvalidCastException")) {
1553 char *from_name = mono_type_get_full_name (jit_tls->class_cast_from);
1554 char *to_name = mono_type_get_full_name (jit_tls->class_cast_to);
1555 char *msg = g_strdup_printf ("Unable to cast object of type '%s' to type '%s'.", from_name, to_name);
1556 mono_ex->message = mono_string_new (domain, msg);
1561 if (!strcmp (mono_ex->object.vtable->klass->name, "ArrayTypeMismatchException")) {
1562 char *from_name = mono_type_get_full_name (jit_tls->class_cast_from);
1563 char *to_name = mono_type_get_full_name (jit_tls->class_cast_to);
1564 char *msg = g_strdup_printf ("Source array of type '%s' cannot be cast to destination array type '%s'.", from_name, to_name);
1565 mono_ex->message = mono_string_new (domain, msg);
1573 call_filter = mono_get_call_filter ();
1575 g_assert (jit_tls->end_of_stack);
1576 g_assert (jit_tls->abort_func);
1579 * We set orig_ex_ctx_set to TRUE/FALSE around profiler calls to make sure it doesn't
1580 * end up being TRUE on any code path.
1582 memcpy (&jit_tls->orig_ex_ctx, ctx, sizeof (MonoContext));
1587 MonoContext ctx_cp = *ctx;
1588 if (mono_trace_is_enabled ()) {
1589 MonoMethod *system_exception_get_message = mono_class_get_method_from_name (mono_defaults.exception_class, "get_Message", 0);
1590 MonoMethod *get_message = system_exception_get_message == NULL ? NULL : mono_object_get_virtual_method (obj, system_exception_get_message);
1591 MonoObject *message;
1592 const char *type_name = mono_class_get_name (mono_object_class (mono_ex));
1594 MonoObject *exc = NULL;
1595 if (get_message == NULL) {
1597 } else if (!strcmp (type_name, "OutOfMemoryException") || !strcmp (type_name, "StackOverflowException")) {
1599 msg = g_strdup_printf ("(No exception message for: %s)\n", type_name);
1601 message = mono_runtime_invoke (get_message, obj, NULL, &exc);
1605 msg = message ? mono_string_to_utf8 ((MonoString *) message) : g_strdup ("(System.Exception.Message property not available)");
1607 g_print ("[%p:] EXCEPTION handling: %s.%s: %s\n", (void*)GetCurrentThreadId (), mono_object_class (obj)->name_space, mono_object_class (obj)->name, msg);
1609 if (mono_ex && mono_trace_eval_exception (mono_object_class (mono_ex)))
1610 mono_print_thread_dump_from_ctx (ctx);
1612 jit_tls->orig_ex_ctx_set = TRUE;
1613 mono_profiler_exception_thrown (obj);
1614 jit_tls->orig_ex_ctx_set = FALSE;
1616 res = mono_handle_exception_internal_first_pass (&ctx_cp, obj, &first_filter_idx, &ji, &prev_ji, non_exception);
1619 if (mini_get_debug_options ()->break_on_exc)
1621 mono_debugger_agent_handle_exception (obj, ctx, NULL);
1623 if (mini_get_debug_options ()->suspend_on_unhandled) {
1624 mono_runtime_printf_err ("Unhandled exception, suspending...");
1629 // FIXME: This runs managed code so it might cause another stack overflow when
1630 // we are handling a stack overflow
1631 mono_unhandled_exception (obj);
1633 gboolean unhandled = FALSE;
1636 * The exceptions caught by the mono_runtime_invoke () calls in mono_async_invoke () needs to be treated as
1637 * unhandled (#669836).
1638 * FIXME: The check below is hackish, but its hard to distinguish these runtime invoke calls from others
1641 if (ji && jinfo_get_method (ji)->wrapper_type == MONO_WRAPPER_RUNTIME_INVOKE) {
1643 MonoInternalThread *thread = mono_thread_internal_current ();
1644 if (jinfo_get_method (prev_ji) == thread->async_invoke_method)
1649 mono_debugger_agent_handle_exception (obj, ctx, NULL);
1651 mono_debugger_agent_handle_exception (obj, ctx, &ctx_cp);
1661 MonoContext new_ctx;
1663 int clause_index_start = 0;
1664 gboolean unwind_res = TRUE;
1668 ji = jit_tls->resume_state.ji;
1669 new_ctx = jit_tls->resume_state.new_ctx;
1670 clause_index_start = jit_tls->resume_state.clause_index;
1671 lmf = jit_tls->resume_state.lmf;
1672 first_filter_idx = jit_tls->resume_state.first_filter_idx;
1673 filter_idx = jit_tls->resume_state.filter_idx;
1675 StackFrameInfo frame;
1677 unwind_res = mono_find_jit_info_ext (domain, jit_tls, NULL, ctx, &new_ctx, NULL, &lmf, NULL, &frame);
1679 if (frame.type == FRAME_TYPE_DEBUGGER_INVOKE || frame.type == FRAME_TYPE_MANAGED_TO_NATIVE) {
1683 g_assert (frame.type == FRAME_TYPE_MANAGED);
1689 *(mono_get_lmf_addr ()) = lmf;
1691 jit_tls->abort_func (obj);
1692 g_assert_not_reached ();
1695 method = jinfo_get_method (ji);
1697 //printf ("M: %s %d.\n", mono_method_full_name (method, TRUE), frame_count);
1699 if (stack_overflow) {
1700 if (DOES_STACK_GROWS_UP)
1701 free_stack = (guint8*)(MONO_CONTEXT_GET_SP (ctx)) - (guint8*)(MONO_CONTEXT_GET_SP (&initial_ctx));
1703 free_stack = (guint8*)(MONO_CONTEXT_GET_SP (&initial_ctx)) - (guint8*)(MONO_CONTEXT_GET_SP (ctx));
1705 free_stack = 0xffffff;
1708 for (i = clause_index_start; i < ji->num_clauses; i++) {
1709 MonoJitExceptionInfo *ei = &ji->clauses [i];
1710 gboolean filtered = FALSE;
1713 * During stack overflow, wait till the unwinding frees some stack
1714 * space before running handlers/finalizers.
1716 if (free_stack <= (64 * 1024))
1719 if (is_address_protected (ji, ei, MONO_CONTEXT_GET_IP (ctx))) {
1721 MonoClass *catch_class = get_exception_catch_class (ei, ji, ctx);
1724 * Have to unwrap RuntimeWrappedExceptions if the
1725 * method's assembly doesn't have a RuntimeCompatibilityAttribute.
1727 if (non_exception && !wrap_non_exception_throws (method))
1728 ex_obj = non_exception;
1732 if (((ei->flags == MONO_EXCEPTION_CLAUSE_NONE) || (ei->flags == MONO_EXCEPTION_CLAUSE_FILTER))) {
1733 if (ji->from_llvm) {
1734 #ifdef MONO_CONTEXT_SET_LLVM_EXC_REG
1735 MONO_CONTEXT_SET_LLVM_EXC_REG (ctx, ex_obj);
1737 g_assert_not_reached ();
1740 /* store the exception object in bp + ei->exvar_offset */
1741 *((gpointer *)(gpointer)((char *)MONO_CONTEXT_GET_BP (ctx) + ei->exvar_offset)) = ex_obj;
1745 if (ei->flags == MONO_EXCEPTION_CLAUSE_FILTER) {
1747 * Filter clauses should only be run in the
1748 * first pass of exception handling.
1750 filtered = (filter_idx == first_filter_idx);
1754 if ((ei->flags == MONO_EXCEPTION_CLAUSE_NONE &&
1755 mono_object_isinst (ex_obj, catch_class)) || filtered) {
1757 * This guards against the situation that we abort a thread that is executing a finally clause
1758 * that was called by the EH machinery. It won't have a guard trampoline installed, so we must
1759 * check for this situation here and resume interruption if we are below the guarded block.
1761 if (G_UNLIKELY (jit_tls->handler_block_return_address)) {
1762 gboolean is_outside = FALSE;
1763 gpointer prot_bp = MONO_CONTEXT_GET_BP (&jit_tls->handler_block_context);
1764 gpointer catch_bp = MONO_CONTEXT_GET_BP (ctx);
1765 //FIXME make this stack direction aware
1766 if (catch_bp > prot_bp) {
1768 } else if (catch_bp == prot_bp) {
1769 /* Can be either try { try { } catch {} } finally {} or try { try { } finally {} } catch {}
1770 * So we check if the catch handler_start is protected by the guarded handler protected region
1773 * If there is an outstanding guarded_block return address, it means the current thread must be aborted.
1774 * This is the only way to reach out the guarded block as other cases are handled by the trampoline.
1775 * There aren't any further finally/fault handler blocks down the stack over this exception.
1776 * This must be ensured by the code that installs the guard trampoline.
1778 g_assert (ji == mini_jit_info_table_find (domain, MONO_CONTEXT_GET_IP (&jit_tls->handler_block_context), NULL));
1780 if (!is_address_protected (ji, jit_tls->handler_block, ei->handler_start)) {
1785 jit_tls->handler_block_return_address = NULL;
1786 jit_tls->handler_block = NULL;
1787 mono_thread_resume_interruption (); /*We ignore the exception here, it will be raised later*/
1791 if (mono_trace_is_enabled () && mono_trace_eval (method))
1792 g_print ("EXCEPTION: catch found at clause %d of %s\n", i, mono_method_full_name (method, TRUE));
1793 jit_tls->orig_ex_ctx_set = TRUE;
1794 mono_profiler_exception_clause_handler (method, ei->flags, i);
1795 jit_tls->orig_ex_ctx_set = FALSE;
1796 MONO_CONTEXT_SET_IP (ctx, ei->handler_start);
1797 *(mono_get_lmf_addr ()) = lmf;
1798 #ifndef DISABLE_PERFCOUNTERS
1799 mono_perfcounters->exceptions_depth += frame_count;
1801 if (obj == domain->stack_overflow_ex)
1802 jit_tls->handling_stack_ovf = FALSE;
1806 if (is_address_protected (ji, ei, MONO_CONTEXT_GET_IP (ctx)) &&
1807 (ei->flags == MONO_EXCEPTION_CLAUSE_FAULT)) {
1808 if (mono_trace_is_enabled () && mono_trace_eval (method))
1809 g_print ("EXCEPTION: fault clause %d of %s\n", i, mono_method_full_name (method, TRUE));
1810 jit_tls->orig_ex_ctx_set = TRUE;
1811 mono_profiler_exception_clause_handler (method, ei->flags, i);
1812 jit_tls->orig_ex_ctx_set = FALSE;
1813 call_filter (ctx, ei->handler_start);
1815 if (is_address_protected (ji, ei, MONO_CONTEXT_GET_IP (ctx)) &&
1816 (ei->flags == MONO_EXCEPTION_CLAUSE_FINALLY)) {
1817 if (mono_trace_is_enabled () && mono_trace_eval (method))
1818 g_print ("EXCEPTION: finally clause %d of %s\n", i, mono_method_full_name (method, TRUE));
1819 jit_tls->orig_ex_ctx_set = TRUE;
1820 mono_profiler_exception_clause_handler (method, ei->flags, i);
1821 jit_tls->orig_ex_ctx_set = FALSE;
1822 #ifndef DISABLE_PERFCOUNTERS
1823 mono_perfcounters->exceptions_finallys++;
1825 *(mono_get_lmf_addr ()) = lmf;
1826 if (ji->from_llvm) {
1828 * LLVM compiled finally handlers follow the design
1829 * of the c++ ehabi, i.e. they call a resume function
1830 * at the end instead of returning to the caller.
1831 * So save the exception handling state,
1832 * mono_resume_unwind () will call us again to continue
1835 jit_tls->resume_state.ex_obj = obj;
1836 jit_tls->resume_state.ji = ji;
1837 jit_tls->resume_state.clause_index = i + 1;
1838 jit_tls->resume_state.ctx = *ctx;
1839 jit_tls->resume_state.new_ctx = new_ctx;
1840 jit_tls->resume_state.lmf = lmf;
1841 jit_tls->resume_state.first_filter_idx = first_filter_idx;
1842 jit_tls->resume_state.filter_idx = filter_idx;
1843 MONO_CONTEXT_SET_IP (ctx, ei->handler_start);
1846 call_filter (ctx, ei->handler_start);
1852 jit_tls->orig_ex_ctx_set = TRUE;
1853 mono_profiler_exception_method_leave (method);
1854 jit_tls->orig_ex_ctx_set = FALSE;
1859 g_assert_not_reached ();
1863 * mono_debugger_run_finally:
1864 * @start_ctx: saved processor state
1866 * This method is called by the Mono Debugger to call all `finally' clauses of the
1867 * current stack frame. It's used when the user issues a `return' command to make
1868 * the current stack frame return. After returning from this method, the debugger
1869 * unwinds the stack one frame and gives control back to the user.
1871 * NOTE: This method is only used when running inside the Mono Debugger.
1874 mono_debugger_run_finally (MonoContext *start_ctx)
1876 static int (*call_filter) (MonoContext *, gpointer) = NULL;
1877 MonoDomain *domain = mono_domain_get ();
1878 MonoJitTlsData *jit_tls = mono_native_tls_get_value (mono_jit_tls_id);
1879 MonoLMF *lmf = mono_get_lmf ();
1880 MonoContext ctx, new_ctx;
1881 MonoJitInfo *ji, rji;
1886 ji = mono_find_jit_info (domain, jit_tls, &rji, NULL, &ctx, &new_ctx, NULL, &lmf, NULL, NULL);
1887 if (!ji || ji == (gpointer)-1)
1891 call_filter = mono_get_call_filter ();
1893 for (i = 0; i < ji->num_clauses; i++) {
1894 MonoJitExceptionInfo *ei = &ji->clauses [i];
1896 if (is_address_protected (ji, ei, MONO_CONTEXT_GET_IP (&ctx)) &&
1897 (ei->flags & MONO_EXCEPTION_CLAUSE_FINALLY)) {
1898 call_filter (&ctx, ei->handler_start);
1904 * mono_handle_exception:
1905 * @ctx: saved processor state
1906 * @obj: the exception object
1909 mono_handle_exception (MonoContext *ctx, gpointer obj)
1911 #ifndef DISABLE_PERFCOUNTERS
1912 mono_perfcounters->exceptions_thrown++;
1915 return mono_handle_exception_internal (ctx, obj, FALSE, NULL);
1918 #ifdef MONO_ARCH_SIGSEGV_ON_ALTSTACK
1920 #ifndef MONO_ARCH_USE_SIGACTION
1921 #error "Can't use sigaltstack without sigaction"
1924 #define ALIGN_TO(val,align) ((((guint64)val) + ((align) - 1)) & ~((align) - 1))
1927 mono_setup_altstack (MonoJitTlsData *tls)
1931 guint8 *staddr = NULL;
1933 if (mono_running_on_valgrind ())
1936 mono_thread_info_get_stack_bounds (&staddr, &stsize);
1940 tls->end_of_stack = staddr + stsize;
1941 tls->stack_size = stsize;
1943 /*g_print ("thread %p, stack_base: %p, stack_size: %d\n", (gpointer)pthread_self (), staddr, stsize);*/
1945 tls->stack_ovf_guard_base = staddr + mono_pagesize ();
1946 tls->stack_ovf_guard_size = ALIGN_TO (8 * 4096, mono_pagesize ());
1948 g_assert ((guint8*)&sa >= (guint8*)tls->stack_ovf_guard_base + tls->stack_ovf_guard_size);
1950 if (mono_mprotect (tls->stack_ovf_guard_base, tls->stack_ovf_guard_size, MONO_MMAP_NONE)) {
1951 /* mprotect can fail for the main thread stack */
1952 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);
1953 g_assert (gaddr == tls->stack_ovf_guard_base);
1954 tls->stack_ovf_valloced = TRUE;
1957 /* Setup an alternate signal stack */
1958 tls->signal_stack = mono_valloc (0, MONO_ARCH_SIGNAL_STACK_SIZE, MONO_MMAP_READ|MONO_MMAP_WRITE|MONO_MMAP_PRIVATE|MONO_MMAP_ANON);
1959 tls->signal_stack_size = MONO_ARCH_SIGNAL_STACK_SIZE;
1961 g_assert (tls->signal_stack);
1963 sa.ss_sp = tls->signal_stack;
1964 sa.ss_size = MONO_ARCH_SIGNAL_STACK_SIZE;
1966 g_assert (sigaltstack (&sa, NULL) == 0);
1968 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);
1972 mono_free_altstack (MonoJitTlsData *tls)
1977 sa.ss_sp = tls->signal_stack;
1978 sa.ss_size = MONO_ARCH_SIGNAL_STACK_SIZE;
1979 sa.ss_flags = SS_DISABLE;
1980 err = sigaltstack (&sa, NULL);
1981 g_assert (err == 0);
1983 if (tls->signal_stack)
1984 mono_vfree (tls->signal_stack, MONO_ARCH_SIGNAL_STACK_SIZE);
1985 if (tls->stack_ovf_valloced)
1986 mono_vfree (tls->stack_ovf_guard_base, tls->stack_ovf_guard_size);
1988 mono_mprotect (tls->stack_ovf_guard_base, tls->stack_ovf_guard_size, MONO_MMAP_READ|MONO_MMAP_WRITE);
1991 #else /* !MONO_ARCH_SIGSEGV_ON_ALTSTACK */
1994 mono_setup_altstack (MonoJitTlsData *tls)
1999 mono_free_altstack (MonoJitTlsData *tls)
2003 #endif /* MONO_ARCH_SIGSEGV_ON_ALTSTACK */
2006 try_restore_stack_protection (MonoJitTlsData *jit_tls, int extra_bytes)
2008 gint32 unprotect_size = jit_tls->stack_ovf_guard_size;
2009 /* we need to leave some room for throwing the exception */
2010 while (unprotect_size >= 0 && (char*)jit_tls->stack_ovf_guard_base + unprotect_size > ((char*)&unprotect_size - extra_bytes))
2011 unprotect_size -= mono_pagesize ();
2012 /* at this point we could try and build a new domain->stack_overflow_ex, but only if there
2013 * is sufficient stack
2015 //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);
2017 mono_mprotect (jit_tls->stack_ovf_guard_base, unprotect_size, MONO_MMAP_NONE);
2018 return unprotect_size == jit_tls->stack_ovf_guard_size;
2021 static G_GNUC_UNUSED void
2022 try_more_restore (void)
2024 MonoJitTlsData *jit_tls = mono_native_tls_get_value (mono_jit_tls_id);
2025 if (try_restore_stack_protection (jit_tls, 500))
2026 jit_tls->restore_stack_prot = NULL;
2029 static G_GNUC_UNUSED void
2030 restore_stack_protection (void)
2032 MonoJitTlsData *jit_tls = mono_native_tls_get_value (mono_jit_tls_id);
2033 MonoException *ex = mono_domain_get ()->stack_overflow_ex;
2034 /* if we can't restore the stack protection, keep a callback installed so
2035 * we'll try to restore as much stack as we can at each return from unmanaged
2038 if (try_restore_stack_protection (jit_tls, 4096))
2039 jit_tls->restore_stack_prot = NULL;
2041 jit_tls->restore_stack_prot = try_more_restore_tramp;
2042 /* here we also throw a stack overflow exception */
2043 ex->trace_ips = NULL;
2044 ex->stack_trace = NULL;
2045 mono_raise_exception (ex);
2049 mono_altstack_restore_prot (mgreg_t *regs, guint8 *code, gpointer *tramp_data, guint8* tramp)
2051 void (*func)(void) = (gpointer)tramp_data;
2057 mono_handle_soft_stack_ovf (MonoJitTlsData *jit_tls, MonoJitInfo *ji, void *ctx, guint8* fault_addr)
2059 /* we got a stack overflow in the soft-guard pages
2060 * There are two cases:
2061 * 1) managed code caused the overflow: we unprotect the soft-guard page
2062 * and let the arch-specific code trigger the exception handling mechanism
2063 * in the thread stack. The soft-guard pages will be protected again as the stack is unwound.
2064 * 2) unmanaged code caused the overflow: we unprotect the soft-guard page
2065 * and hope we can continue with those enabled, at least until the hard-guard page
2066 * is hit. The alternative to continuing here is to just print a message and abort.
2067 * We may add in the future the code to protect the pages again in the codepath
2068 * when we return from unmanaged to managed code.
2070 if (jit_tls->stack_ovf_guard_size && fault_addr >= (guint8*)jit_tls->stack_ovf_guard_base &&
2071 fault_addr < (guint8*)jit_tls->stack_ovf_guard_base + jit_tls->stack_ovf_guard_size) {
2072 /* we unprotect the minimum amount we can */
2074 gboolean handled = FALSE;
2076 guard_size = jit_tls->stack_ovf_guard_size - (mono_pagesize () * SIZEOF_VOID_P / 4);
2077 while (guard_size && fault_addr < (guint8*)jit_tls->stack_ovf_guard_base + guard_size) {
2078 guard_size -= mono_pagesize ();
2080 guard_size = jit_tls->stack_ovf_guard_size - guard_size;
2081 /*fprintf (stderr, "unprotecting: %d\n", guard_size);*/
2082 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);
2083 #ifdef MONO_ARCH_SIGSEGV_ON_ALTSTACK
2085 mono_arch_handle_altstack_exception (ctx, fault_addr, TRUE);
2090 /* We print a message: after this even managed stack overflows
2091 * may crash the runtime
2093 mono_runtime_printf_err ("Stack overflow in unmanaged: IP: %p, fault addr: %p", mono_arch_ip_from_context (ctx), fault_addr);
2094 if (!jit_tls->handling_stack_ovf) {
2095 jit_tls->restore_stack_prot = restore_stack_protection_tramp;
2096 jit_tls->handling_stack_ovf = 1;
2098 /*fprintf (stderr, "Already handling stack overflow\n");*/
2107 MonoMethod *omethod;
2109 } PrintOverflowUserData;
2111 #ifdef MONO_ARCH_HAVE_SIGCTX_TO_MONOCTX
2113 print_overflow_stack_frame (StackFrameInfo *frame, MonoContext *ctx, gpointer data)
2115 MonoMethod *method = NULL;
2116 PrintOverflowUserData *user_data = data;
2120 method = jinfo_get_method (frame->ji);
2123 if (user_data->count == 0) {
2124 /* The first frame is in its prolog, so a line number cannot be computed */
2125 user_data->count ++;
2129 /* If this is a one method overflow, skip the other instances */
2130 if (method == user_data->omethod)
2133 location = mono_debug_print_stack_frame (method, frame->native_offset, mono_domain_get ());
2134 mono_runtime_printf_err (" %s", location);
2137 if (user_data->count == 1) {
2138 mono_runtime_printf_err (" <...>");
2139 user_data->omethod = method;
2141 user_data->omethod = NULL;
2144 user_data->count ++;
2146 mono_runtime_printf_err (" at <unknown> <0x%05x>", frame->native_offset);
2153 mono_handle_hard_stack_ovf (MonoJitTlsData *jit_tls, MonoJitInfo *ji, void *ctx, guint8* fault_addr)
2155 #ifdef MONO_ARCH_HAVE_SIGCTX_TO_MONOCTX
2156 PrintOverflowUserData ud;
2160 /* we don't do much now, but we can warn the user with a useful message */
2161 mono_runtime_printf_err ("Stack overflow: IP: %p, fault addr: %p", mono_arch_ip_from_context (ctx), fault_addr);
2163 #ifdef MONO_ARCH_HAVE_SIGCTX_TO_MONOCTX
2164 mono_arch_sigctx_to_monoctx (ctx, &mctx);
2166 mono_runtime_printf_err ("Stacktrace:");
2168 memset (&ud, 0, sizeof (ud));
2170 mono_walk_stack_with_ctx (print_overflow_stack_frame, &mctx, MONO_UNWIND_LOOKUP_ACTUAL_METHOD, &ud);
2172 if (ji && jinfo_get_method (ji))
2173 mono_runtime_printf_err ("At %s", mono_method_full_name (jinfo_get_method (ji), TRUE));
2175 mono_runtime_printf_err ("At <unmanaged>.");
2182 print_stack_frame_to_stderr (StackFrameInfo *frame, MonoContext *ctx, gpointer data)
2184 MonoMethod *method = NULL;
2187 method = jinfo_get_method (frame->ji);
2190 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, mono_domain_get ());
2191 mono_runtime_printf_err (" %s", location);
2194 mono_runtime_printf_err (" at <unknown> <0x%05x>", frame->native_offset);
2199 static G_GNUC_UNUSED gboolean
2200 print_stack_frame_to_string (StackFrameInfo *frame, MonoContext *ctx, gpointer data)
2202 GString *p = (GString*)data;
2203 MonoMethod *method = NULL;
2206 method = jinfo_get_method (frame->ji);
2209 gchar *location = mono_debug_print_stack_frame (method, frame->native_offset, mono_domain_get ());
2210 g_string_append_printf (p, " %s\n", location);
2213 g_string_append_printf (p, " at <unknown> <0x%05x>\n", frame->native_offset);
2218 static gboolean handling_sigsegv = FALSE;
2221 * mono_handle_native_sigsegv:
2223 * Handle a SIGSEGV received while in native code by printing diagnostic
2224 * information and aborting.
2227 mono_handle_native_sigsegv (int signal, void *ctx)
2229 #ifdef MONO_ARCH_USE_SIGACTION
2230 struct sigaction sa;
2232 MonoJitTlsData *jit_tls = mono_native_tls_get_value (mono_jit_tls_id);
2233 const char *signal_str = (signal == SIGSEGV) ? "SIGSEGV" : "SIGABRT";
2235 if (handling_sigsegv)
2238 if (mini_get_debug_options ()->suspend_on_sigsegv) {
2239 mono_runtime_printf_err ("Received SIGSEGV, suspending...");
2250 /* To prevent infinite loops when the stack walk causes a crash */
2251 handling_sigsegv = TRUE;
2253 /* !jit_tls means the thread was not registered with the runtime */
2254 if (jit_tls && mono_thread_internal_current ()) {
2255 mono_runtime_printf_err ("Stacktrace:\n");
2257 mono_walk_stack (print_stack_frame_to_stderr, TRUE, NULL);
2260 #ifdef HAVE_BACKTRACE_SYMBOLS
2266 mono_runtime_printf_err ("\nNative stacktrace:\n");
2268 size = backtrace (array, 256);
2269 names = backtrace_symbols (array, size);
2270 for (i =0; i < size; ++i) {
2271 mono_runtime_printf_err ("\t%s", names [i]);
2275 /* Try to get more meaningful information using gdb */
2277 #if !defined(HOST_WIN32) && defined(HAVE_SYS_SYSCALL_H) && defined(SYS_fork)
2278 if (!mini_get_debug_options ()->no_gdb_backtrace) {
2279 /* From g_spawn_command_line_sync () in eglib */
2282 pid_t crashed_pid = getpid ();
2286 * glibc fork acquires some locks, so if the crash happened inside malloc/free,
2287 * it will deadlock. Call the syscall directly instead.
2289 pid = mono_runtime_syscall_fork ();
2292 dup2 (STDERR_FILENO, STDOUT_FILENO);
2294 mono_gdb_render_native_backtraces (crashed_pid);
2298 mono_runtime_printf_err ("\nDebug info from gdb:\n");
2299 waitpid (pid, &status, 0);
2306 * A SIGSEGV indicates something went very wrong so we can no longer depend
2307 * on anything working. So try to print out lots of diagnostics, starting
2308 * with ones which have a greater chance of working.
2310 mono_runtime_printf_err (
2312 "=================================================================\n"
2313 "Got a %s while executing native code. This usually indicates\n"
2314 "a fatal error in the mono runtime or one of the native libraries \n"
2315 "used by your application.\n"
2316 "=================================================================\n",
2320 #ifdef MONO_ARCH_USE_SIGACTION
2322 /* Remove our SIGABRT handler */
2323 sa.sa_handler = SIG_DFL;
2324 sigemptyset (&sa.sa_mask);
2327 g_assert (sigaction (SIGABRT, &sa, NULL) != -1);
2331 /*Android abort is a fluke, it doesn't abort, it triggers another segv. */
2332 #if defined (PLATFORM_ANDROID)
2340 mono_print_thread_dump_internal (void *sigctx, MonoContext *start_ctx)
2342 MonoInternalThread *thread = mono_thread_internal_current ();
2343 #ifdef MONO_ARCH_HAVE_SIGCTX_TO_MONOCTX
2346 GString* text = g_string_new (0);
2347 char *name, *wapi_desc;
2348 GError *error = NULL;
2351 name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
2353 g_string_append_printf (text, "\n\"%s\"", name);
2356 else if (thread->threadpool_thread)
2357 g_string_append (text, "\n\"<threadpool thread>\"");
2359 g_string_append (text, "\n\"<unnamed thread>\"");
2362 wapi_desc = wapi_current_thread_desc ();
2363 g_string_append_printf (text, " tid=0x%p this=0x%p %s\n", (gpointer)(gsize)thread->tid, thread, wapi_desc);
2367 #ifdef MONO_ARCH_HAVE_SIGCTX_TO_MONOCTX
2369 memcpy (&ctx, start_ctx, sizeof (MonoContext));
2371 MONO_INIT_CONTEXT_FROM_FUNC (&ctx, mono_print_thread_dump);
2373 mono_arch_sigctx_to_monoctx (sigctx, &ctx);
2375 mono_walk_stack_with_ctx (print_stack_frame_to_string, &ctx, MONO_UNWIND_LOOKUP_ALL, text);
2377 mono_runtime_printf ("\t<Stack traces in thread dumps not supported on this platform>");
2380 mono_runtime_printf ("%s", text->str);
2382 #if PLATFORM_WIN32 && TARGET_WIN32 && _DEBUG
2383 OutputDebugStringA(text->str);
2386 g_string_free (text, TRUE);
2387 mono_runtime_stdout_fflush ();
2391 * mono_print_thread_dump:
2393 * Print information about the current thread to stdout.
2394 * SIGCTX can be NULL, allowing this to be called from gdb.
2397 mono_print_thread_dump (void *sigctx)
2399 mono_print_thread_dump_internal (sigctx, NULL);
2403 mono_print_thread_dump_from_ctx (MonoContext *ctx)
2405 mono_print_thread_dump_internal (NULL, ctx);
2409 * mono_resume_unwind:
2411 * This is called by a trampoline from LLVM compiled finally clauses to continue
2415 mono_resume_unwind (MonoContext *ctx)
2417 MonoJitTlsData *jit_tls = mono_native_tls_get_value (mono_jit_tls_id);
2418 MonoContext new_ctx;
2420 MONO_CONTEXT_SET_IP (ctx, MONO_CONTEXT_GET_IP (&jit_tls->resume_state.ctx));
2421 MONO_CONTEXT_SET_SP (ctx, MONO_CONTEXT_GET_SP (&jit_tls->resume_state.ctx));
2424 mono_handle_exception_internal (&new_ctx, jit_tls->resume_state.ex_obj, TRUE, NULL);
2426 mono_restore_context (&new_ctx);
2429 #ifdef MONO_ARCH_HAVE_HANDLER_BLOCK_GUARD
2434 MonoJitExceptionInfo *ei;
2435 } FindHandlerBlockData;
2438 find_last_handler_block (StackFrameInfo *frame, MonoContext *ctx, gpointer data)
2442 FindHandlerBlockData *pdata = data;
2443 MonoJitInfo *ji = frame->ji;
2448 ip = MONO_CONTEXT_GET_IP (ctx);
2450 for (i = 0; i < ji->num_clauses; ++i) {
2451 MonoJitExceptionInfo *ei = ji->clauses + i;
2452 if (ei->flags != MONO_EXCEPTION_CLAUSE_FINALLY)
2454 /*If ip points to the first instruction it means the handler block didn't start
2455 so we can leave its execution to the EH machinery*/
2456 if (ei->handler_start < ip && ip < ei->data.handler_end) {
2468 install_handler_block_guard (MonoJitInfo *ji, MonoContext *ctx)
2471 MonoJitExceptionInfo *clause = NULL;
2474 ip = MONO_CONTEXT_GET_IP (ctx);
2476 for (i = 0; i < ji->num_clauses; ++i) {
2477 clause = &ji->clauses [i];
2478 if (clause->flags != MONO_EXCEPTION_CLAUSE_FINALLY)
2480 if (clause->handler_start < ip && clause->data.handler_end > ip)
2484 /*no matching finally */
2485 if (i == ji->num_clauses)
2488 /*If we stopped on the instruction right before the try, we haven't actually started executing it*/
2489 if (ip == clause->handler_start)
2492 return mono_arch_install_handler_block_guard (ji, clause, ctx, mono_create_handler_block_trampoline ());
2496 * Finds the bottom handler block running and install a block guard if needed.
2497 * FIXME add full-aot support.
2500 mono_install_handler_block_guard (MonoThreadUnwindState *ctx)
2502 FindHandlerBlockData data = { 0 };
2503 MonoJitTlsData *jit_tls = ctx->unwind_data [MONO_UNWIND_DATA_JIT_TLS];
2510 /* Guard against a null MonoJitTlsData. This can happens if the thread receives the
2511 * interrupt signal before the JIT has time to initialize its TLS data for the given thread.
2513 if (!jit_tls || jit_tls->handler_block_return_address)
2516 /* Do an async safe stack walk */
2517 mono_thread_info_set_is_async_context (TRUE);
2518 mono_walk_stack_with_state (find_last_handler_block, ctx, MONO_UNWIND_NONE, &data);
2519 mono_thread_info_set_is_async_context (FALSE);
2524 memcpy (&jit_tls->handler_block_context, &data.ctx, sizeof (MonoContext));
2526 resume_ip = install_handler_block_guard (data.ji, &data.ctx);
2527 if (resume_ip == NULL)
2530 jit_tls->handler_block_return_address = resume_ip;
2531 jit_tls->handler_block = data.ei;
2538 mono_install_handler_block_guard (MonoThreadUnwindState *ctx)
2546 mono_set_cast_details (MonoClass *from, MonoClass *to)
2548 MonoJitTlsData *jit_tls = NULL;
2550 if (mini_get_debug_options ()->better_cast_details) {
2551 jit_tls = mono_native_tls_get_value (mono_jit_tls_id);
2552 jit_tls->class_cast_from = from;
2553 jit_tls->class_cast_to = to;
2558 /*returns false if the thread is not attached*/
2560 mono_thread_state_init_from_sigctx (MonoThreadUnwindState *ctx, void *sigctx)
2562 #ifdef MONO_ARCH_HAVE_SIGCTX_TO_MONOCTX
2563 MonoInternalThread *thread = mono_thread_internal_current ();
2564 if (!thread || !thread->jit_data) {
2570 mono_arch_sigctx_to_monoctx (sigctx, &ctx->ctx);
2572 #if MONO_ARCH_HAS_MONO_CONTEXT && !defined(MONO_CROSS_COMPILE)
2573 MONO_CONTEXT_GET_CURRENT (ctx->ctx);
2575 g_error ("Use a null sigctx requires a working mono-context");
2578 ctx->unwind_data [MONO_UNWIND_DATA_DOMAIN] = mono_domain_get ();
2579 ctx->unwind_data [MONO_UNWIND_DATA_LMF] = mono_get_lmf ();
2580 ctx->unwind_data [MONO_UNWIND_DATA_JIT_TLS] = thread->jit_data;
2584 g_error ("Implement mono_arch_sigctx_to_monoctx for the current target");
2590 mono_thread_state_init_from_monoctx (MonoThreadUnwindState *ctx, MonoContext *mctx)
2592 MonoInternalThread *thread = mono_thread_internal_current ();
2593 if (!thread || !thread->jit_data) {
2599 ctx->unwind_data [MONO_UNWIND_DATA_DOMAIN] = mono_domain_get ();
2600 ctx->unwind_data [MONO_UNWIND_DATA_LMF] = mono_get_lmf ();
2601 ctx->unwind_data [MONO_UNWIND_DATA_JIT_TLS] = thread->jit_data;
2606 /*returns false if the thread is not attached*/
2608 mono_thread_state_init_from_current (MonoThreadUnwindState *ctx)
2610 MonoInternalThread *thread = mono_thread_internal_current ();
2611 MONO_ARCH_CONTEXT_DEF
2613 mono_arch_flush_register_windows ();
2615 if (!thread || !thread->jit_data) {
2619 #ifdef MONO_INIT_CONTEXT_FROM_CURRENT
2620 MONO_INIT_CONTEXT_FROM_CURRENT (&ctx->ctx);
2622 MONO_INIT_CONTEXT_FROM_FUNC (&ctx->ctx, mono_thread_state_init_from_current);
2625 ctx->unwind_data [MONO_UNWIND_DATA_DOMAIN] = mono_domain_get ();
2626 ctx->unwind_data [MONO_UNWIND_DATA_LMF] = mono_get_lmf ();
2627 ctx->unwind_data [MONO_UNWIND_DATA_JIT_TLS] = thread->jit_data;
2633 mono_raise_exception_with_ctx (MonoException *exc, MonoContext *ctx)
2635 mono_handle_exception (ctx, exc);
2636 mono_restore_context (ctx);
2639 /*FIXME Move all monoctx -> sigctx conversion to signal handlers once all archs support utils/mono-context */
2641 mono_setup_async_callback (MonoContext *ctx, void (*async_cb)(void *fun), gpointer user_data)
2643 #ifdef MONO_ARCH_HAVE_SETUP_ASYNC_CALLBACK
2644 MonoJitTlsData *jit_tls = mono_native_tls_get_value (mono_jit_tls_id);
2645 jit_tls->ex_ctx = *ctx;
2647 mono_arch_setup_async_callback (ctx, async_cb, user_data);
2649 g_error ("This target doesn't support mono_arch_setup_async_callback");
2654 mono_install_unhandled_exception_hook (MonoUnhandledExceptionFunc func, gpointer user_data)
2656 unhandled_exception_hook = func;
2657 unhandled_exception_hook_data = user_data;
2661 mono_invoke_unhandled_exception_hook (MonoObject *exc)
2663 if (unhandled_exception_hook) {
2664 unhandled_exception_hook (exc, unhandled_exception_hook_data);
2666 MonoObject *other = NULL;
2667 MonoString *str = mono_object_to_string (exc, &other);
2671 msg = mono_string_to_utf8 (str);
2673 char *original_backtrace = mono_exception_get_managed_backtrace ((MonoException*)exc);
2674 char *nested_backtrace = mono_exception_get_managed_backtrace ((MonoException*)other);
2676 msg = g_strdup_printf ("Nested exception detected.\nOriginal Exception: %s\nNested exception:%s\n",
2677 original_backtrace, nested_backtrace);
2679 g_free (original_backtrace);
2680 g_free (nested_backtrace);
2682 msg = g_strdup ("Nested exception trying to figure out what went wrong");
2684 mono_runtime_printf_err ("[ERROR] FATAL UNHANDLED EXCEPTION: %s", msg);
2686 #if defined(__APPLE__) && defined(__arm__)
2687 g_assertion_message ("Terminating runtime due to unhandled exception");
2689 exit (mono_environment_exitcode_get ());
2693 g_assert_not_reached ();
2697 * mono_restore_context:
2699 * Call the architecture specific restore context function.
2702 mono_restore_context (MonoContext *ctx)
2704 static void (*restore_context) (MonoContext *);
2706 if (!restore_context)
2707 restore_context = mono_get_restore_context ();
2708 restore_context (ctx);
2709 g_assert_not_reached ();
2713 * mono_jinfo_get_unwind_info:
2715 * Return the unwind info for JI.
2718 mono_jinfo_get_unwind_info (MonoJitInfo *ji, guint32 *unwind_info_len)
2721 return mono_aot_get_unwind_info (ji, unwind_info_len);
2723 return mono_get_cached_unwind_info (ji->used_regs, unwind_info_len);