*
* Authors:
* Dietmar Maurer (dietmar@ximian.com)
+ * Mono Team (mono-list@lists.ximian.com)
*
- * (C) 2001 Ximian, Inc.
+ * Copyright 2001-2003 Ximian, Inc.
+ * Copyright 2003-2008 Ximian, Inc.
*/
#include <config.h>
#include <execinfo.h>
#endif
+#ifdef HAVE_SYS_TYPES_H
+#include <sys/types.h>
+#endif
+
+#ifdef HAVE_SYS_WAIT_H
+#include <sys/wait.h>
+#endif
+
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+
+#ifdef HAVE_SYS_SYSCALL_H
+#include <sys/syscall.h>
+#endif
+
#include <mono/metadata/appdomain.h>
#include <mono/metadata/tabledefs.h>
#include <mono/metadata/threads.h>
+#include <mono/metadata/threads-types.h>
#include <mono/metadata/debug-helpers.h>
#include <mono/metadata/exception.h>
#include <mono/metadata/gc-internal.h>
#include <mono/metadata/mono-debug.h>
+#include <mono/metadata/profiler.h>
+#include <mono/utils/mono-mmap.h>
#include "mini.h"
+#include "debug-mini.h"
#include "trace.h"
+#include "debugger-agent.h"
-#ifdef MONO_ARCH_SIGSEGV_ON_ALTSTACK
-#include <unistd.h>
-#include <sys/mman.h>
+#ifndef MONO_ARCH_CONTEXT_DEF
+#define MONO_ARCH_CONTEXT_DEF
#endif
-#define IS_ON_SIGALTSTACK(jit_tls) ((jit_tls) && ((guint8*)&(jit_tls) > (guint8*)(jit_tls)->signal_stack) && ((guint8*)&(jit_tls) < ((guint8*)(jit_tls)->signal_stack + (jit_tls)->signal_stack_size)))
+static gpointer restore_context_func, call_filter_func;
+static gpointer throw_exception_func, rethrow_exception_func;
+static gpointer throw_exception_by_name_func, throw_corlib_exception_func;
-#ifndef MONO_ARCH_CONTEXT_DEF
-#define MONO_ARCH_CONTEXT_DEF
+static gpointer try_more_restore_tramp = NULL;
+static gpointer restore_stack_protection_tramp = NULL;
+
+static void try_more_restore (void);
+static void restore_stack_protection (void);
+
+void
+mono_exceptions_init (void)
+{
+#ifdef MONO_ARCH_HAVE_FULL_AOT_TRAMPOLINES
+ guint32 code_size;
+ MonoJumpInfo *ji;
+
+ if (mono_aot_only) {
+ restore_context_func = mono_aot_get_named_code ("restore_context");
+ call_filter_func = mono_aot_get_named_code ("call_filter");
+ throw_exception_func = mono_aot_get_named_code ("throw_exception");
+ rethrow_exception_func = mono_aot_get_named_code ("rethrow_exception");
+ } else {
+ restore_context_func = mono_arch_get_restore_context_full (&code_size, &ji, FALSE);
+ call_filter_func = mono_arch_get_call_filter_full (&code_size, &ji, FALSE);
+ throw_exception_func = mono_arch_get_throw_exception_full (&code_size, &ji, FALSE);
+ rethrow_exception_func = mono_arch_get_rethrow_exception_full (&code_size, &ji, FALSE);
+ }
+#else
+ restore_context_func = mono_arch_get_restore_context ();
+ call_filter_func = mono_arch_get_call_filter ();
+ throw_exception_func = mono_arch_get_throw_exception ();
+ rethrow_exception_func = mono_arch_get_rethrow_exception ();
+#endif
+#ifdef MONO_ARCH_HAVE_RESTORE_STACK_SUPPORT
+ try_more_restore_tramp = mono_create_specific_trampoline (try_more_restore, MONO_TRAMPOLINE_RESTORE_STACK_PROT, mono_domain_get (), NULL);
+ restore_stack_protection_tramp = mono_create_specific_trampoline (restore_stack_protection, MONO_TRAMPOLINE_RESTORE_STACK_PROT, mono_domain_get (), NULL);
+#endif
+
+#ifdef MONO_ARCH_HAVE_EXCEPTIONS_INIT
+ mono_arch_exceptions_init ();
+#endif
+}
+
+gpointer
+mono_get_throw_exception (void)
+{
+ g_assert (throw_exception_func);
+ return throw_exception_func;
+}
+
+gpointer
+mono_get_rethrow_exception (void)
+{
+ g_assert (rethrow_exception_func);
+ return rethrow_exception_func;
+}
+
+gpointer
+mono_get_call_filter (void)
+{
+ g_assert (call_filter_func);
+ return call_filter_func;
+}
+
+gpointer
+mono_get_restore_context (void)
+{
+ g_assert (restore_context_func);
+ return restore_context_func;
+}
+
+gpointer
+mono_get_throw_exception_by_name (void)
+{
+#ifdef MONO_ARCH_HAVE_THROW_EXCEPTION_BY_NAME
+
+ gpointer code = NULL;
+#ifdef MONO_ARCH_HAVE_FULL_AOT_TRAMPOLINES
+ guint32 code_size;
+ MonoJumpInfo *ji;
+#endif
+
+ /* This depends on corlib classes so cannot be inited in mono_exceptions_init () */
+ if (throw_exception_by_name_func)
+ return throw_exception_by_name_func;
+
+#ifdef MONO_ARCH_HAVE_FULL_AOT_TRAMPOLINES
+ if (mono_aot_only)
+ code = mono_aot_get_named_code ("throw_exception_by_name");
+ else
+ code = mono_arch_get_throw_exception_by_name_full (&code_size, &ji, FALSE);
+#else
+ code = mono_arch_get_throw_exception_by_name ();
#endif
-#ifndef mono_find_jit_info
+ mono_memory_barrier ();
+
+ throw_exception_by_name_func = code;
+
+#else
+
+ throw_exception_by_name_func = NULL;
+
+ g_assert_not_reached ();
+#endif
+
+ return throw_exception_by_name_func;
+}
+
+gpointer
+mono_get_throw_corlib_exception (void)
+{
+ gpointer code = NULL;
+#ifdef MONO_ARCH_HAVE_FULL_AOT_TRAMPOLINES
+ guint32 code_size;
+ MonoJumpInfo *ji;
+#endif
+
+ /* This depends on corlib classes so cannot be inited in mono_exceptions_init () */
+ if (throw_corlib_exception_func)
+ return throw_corlib_exception_func;
+
+#if MONO_ARCH_HAVE_THROW_CORLIB_EXCEPTION
+#ifdef MONO_ARCH_HAVE_FULL_AOT_TRAMPOLINES
+ if (mono_aot_only)
+ code = mono_aot_get_named_code ("throw_corlib_exception");
+ else
+ code = mono_arch_get_throw_corlib_exception_full (&code_size, &ji, FALSE);
+#else
+ code = mono_arch_get_throw_corlib_exception ();
+#endif
+#else
+ g_assert_not_reached ();
+#endif
+
+ mono_memory_barrier ();
+
+ throw_corlib_exception_func = code;
+
+ return throw_corlib_exception_func;
+}
+
+#ifdef MONO_ARCH_HAVE_FIND_JIT_INFO_EXT
+
+/*
+ * find_jit_info_no_ext:
+ *
+ * If the target has the find_jit_info_ext version of this function, define the old
+ * version here which translates between the old and new APIs.
+ */
+static MonoJitInfo *
+find_jit_info_no_ext (MonoDomain *domain, MonoJitTlsData *jit_tls, MonoJitInfo *res, MonoJitInfo *prev_ji, MonoContext *ctx,
+ MonoContext *new_ctx, MonoLMF **lmf, gboolean *managed)
+{
+ StackFrameInfo frame;
+ MonoJitInfo *ji;
+ gboolean err;
+ gpointer ip = MONO_CONTEXT_GET_IP (ctx);
+
+ /* Avoid costly table lookup during stack overflow */
+ if (prev_ji && (ip > prev_ji->code_start && ((guint8*)ip < ((guint8*)prev_ji->code_start) + prev_ji->code_size)))
+ ji = prev_ji;
+ else
+ ji = mini_jit_info_table_find (domain, ip, NULL);
+
+ if (managed)
+ *managed = FALSE;
+
+ err = mono_arch_find_jit_info_ext (domain, jit_tls, ji, ctx, new_ctx, lmf, &frame);
+ if (!err)
+ return (gpointer)-1;
+
+ /* Convert between the new and the old APIs */
+ switch (frame.type) {
+ case FRAME_TYPE_MANAGED:
+ if (managed)
+ *managed = TRUE;
+ return ji;
+ case FRAME_TYPE_MANAGED_TO_NATIVE:
+ if (frame.ji)
+ return frame.ji;
+ else {
+ memset (res, 0, sizeof (MonoJitInfo));
+ res->method = frame.method;
+ return res;
+ }
+ case FRAME_TYPE_DEBUGGER_INVOKE: {
+ MonoContext tmp_ctx;
+
+ /*
+ * The normal exception handling code can't handle this frame, so just
+ * skip it.
+ */
+ ji = find_jit_info_no_ext (domain, jit_tls, res, NULL, new_ctx, &tmp_ctx, lmf, managed);
+ memcpy (new_ctx, &tmp_ctx, sizeof (MonoContext));
+ return ji;
+ }
+ default:
+ g_assert_not_reached ();
+ return NULL;
+ }
+}
+
+#endif
/* mono_find_jit_info:
*
* the @lmf if necessary. @native_offset return the IP offset from the
* start of the function or -1 if that info is not available.
*/
-static MonoJitInfo *
-mono_find_jit_info (MonoDomain *domain, MonoJitTlsData *jit_tls, MonoJitInfo *res, MonoJitInfo *prev_ji, MonoContext *ctx,
- MonoContext *new_ctx, char **trace, MonoLMF **lmf, int *native_offset,
- gboolean *managed)
+MonoJitInfo *
+mono_find_jit_info (MonoDomain *domain, MonoJitTlsData *jit_tls, MonoJitInfo *res, MonoJitInfo *prev_ji, MonoContext *ctx,
+ MonoContext *new_ctx, char **trace, MonoLMF **lmf, int *native_offset,
+ gboolean *managed)
{
gboolean managed2;
gpointer ip = MONO_CONTEXT_GET_IP (ctx);
if (managed)
*managed = FALSE;
- ji = mono_arch_find_jit_info (domain, jit_tls, res, prev_ji, ctx, new_ctx, NULL, lmf, NULL, &managed2);
+#ifdef MONO_ARCH_HAVE_FIND_JIT_INFO_EXT
+ ji = find_jit_info_no_ext (domain, jit_tls, res, prev_ji, ctx, new_ctx, lmf, &managed2);
+#else
+ ji = mono_arch_find_jit_info (domain, jit_tls, res, prev_ji, ctx, new_ctx, lmf, &managed2);
+#endif
if (ji == (gpointer)-1)
return ji;
- if (managed2 || ji->method->wrapper_type) {
- char *source_location, *tmpaddr, *fname;
- gint32 offset, iloffset;
+ if (managed2 || (ji && ji->method->wrapper_type)) {
+ const char *real_ip, *start;
+ gint32 offset;
+ start = (const char *)ji->code_start;
if (!managed2)
/* ctx->ip points into native code */
- offset = (char*)MONO_CONTEXT_GET_IP (new_ctx) - (char*)ji->code_start;
+ real_ip = (const char*)MONO_CONTEXT_GET_IP (new_ctx);
+ else
+ real_ip = (const char*)ip;
+
+ if ((real_ip >= start) && (real_ip <= start + ji->code_size))
+ offset = real_ip - start;
else
- offset = (char *)ip - (char *)ji->code_start;
+ offset = -1;
if (native_offset)
*native_offset = offset;
if (!ji->method->wrapper_type)
*managed = TRUE;
+ if (trace)
+ *trace = mono_debug_print_stack_frame (ji->method, offset, domain);
+ } else {
if (trace) {
- source_location = mono_debug_source_location_from_address (ji->method, offset, NULL, domain);
- iloffset = mono_debug_il_offset_from_address (ji->method, offset, domain);
-
- if (iloffset < 0)
- tmpaddr = g_strdup_printf ("<0x%05x>", offset);
- else
- tmpaddr = g_strdup_printf ("[0x%05x]", iloffset);
-
- fname = mono_method_full_name (ji->method, TRUE);
-
- if (source_location)
- *trace = g_strdup_printf ("in %s (at %s) %s", tmpaddr, source_location, fname);
- else
- *trace = g_strdup_printf ("in %s %s", tmpaddr, fname);
-
+ char *fname = mono_method_full_name (res->method, TRUE);
+ *trace = g_strdup_printf ("in (unmanaged) %s", fname);
g_free (fname);
- g_free (source_location);
- g_free (tmpaddr);
}
}
- else {
- if (trace) {
- char *fname = mono_method_full_name (res->method, TRUE);
+
+ return ji;
+}
+
+#ifdef MONO_ARCH_HAVE_FIND_JIT_INFO_EXT
+
+/*
+ * mono_find_jit_info_ext:
+ *
+ * A version of mono_find_jit_info which returns all data in the StackFrameInfo
+ * structure.
+ */
+gboolean
+mono_find_jit_info_ext (MonoDomain *domain, MonoJitTlsData *jit_tls,
+ MonoJitInfo *prev_ji, MonoContext *ctx,
+ MonoContext *new_ctx, char **trace, MonoLMF **lmf,
+ StackFrameInfo *frame)
+{
+ gboolean err;
+ gpointer ip = MONO_CONTEXT_GET_IP (ctx);
+ MonoJitInfo *ji;
+ MonoDomain *target_domain;
+
+ if (trace)
+ *trace = NULL;
+
+ /* Avoid costly table lookup during stack overflow */
+ if (prev_ji && (ip > prev_ji->code_start && ((guint8*)ip < ((guint8*)prev_ji->code_start) + prev_ji->code_size)))
+ ji = prev_ji;
+ else
+ ji = mini_jit_info_table_find (domain, ip, &target_domain);
+
+ if (!target_domain)
+ target_domain = domain;
+
+ err = mono_arch_find_jit_info_ext (target_domain, jit_tls, ji, ctx, new_ctx, lmf, frame);
+ if (!err)
+ return FALSE;
+
+ frame->native_offset = -1;
+ frame->domain = target_domain;
+
+ ji = frame->ji;
+
+ if (ji && (frame->managed || ji->method->wrapper_type)) {
+ const char *real_ip, *start;
+
+ start = (const char *)ji->code_start;
+ if (!frame->managed)
+ /* ctx->ip points into native code */
+ real_ip = (const char*)MONO_CONTEXT_GET_IP (new_ctx);
+ else
+ real_ip = (const char*)ip;
+
+ if ((real_ip >= start) && (real_ip <= start + ji->code_size))
+ frame->native_offset = real_ip - start;
+ else
+ frame->native_offset = -1;
+
+ if (trace)
+ *trace = mono_debug_print_stack_frame (ji->method, frame->native_offset, domain);
+ } else {
+ if (trace && frame->method) {
+ char *fname = mono_method_full_name (frame->method, TRUE);
*trace = g_strdup_printf ("in (unmanaged) %s", fname);
g_free (fname);
}
}
- return ji;
+ return TRUE;
+}
+
+#endif /* MONO_ARCH_HAVE_FIND_JIT_INFO_EXT */
+
+static gpointer
+get_generic_info_from_stack_frame (MonoJitInfo *ji, MonoContext *ctx)
+{
+ MonoGenericJitInfo *gi;
+ gpointer info;
+
+ if (!ji->has_generic_jit_info)
+ return NULL;
+ gi = mono_jit_info_get_generic_jit_info (ji);
+ if (!gi->has_this)
+ return NULL;
+
+ if (gi->this_in_reg)
+ info = mono_arch_context_get_int_reg (ctx, gi->this_reg);
+ else
+ info = *(gpointer*)(gpointer)((char*)mono_arch_context_get_int_reg (ctx, gi->this_reg) +
+ gi->this_offset);
+ if (mono_method_get_context (ji->method)->method_inst) {
+ return info;
+ } else if ((ji->method->flags & METHOD_ATTRIBUTE_STATIC) || ji->method->klass->valuetype) {
+ return info;
+ } else {
+ /* Avoid returning a managed object */
+ MonoObject *this_obj = info;
+
+ return this_obj->vtable->klass;
+ }
+}
+
+static MonoGenericContext
+get_generic_context_from_stack_frame (MonoJitInfo *ji, gpointer generic_info)
+{
+ MonoGenericContext context = { NULL, NULL };
+ MonoClass *class, *method_container_class;
+
+ g_assert (generic_info);
+
+ g_assert (ji->method->is_inflated);
+ if (mono_method_get_context (ji->method)->method_inst) {
+ MonoMethodRuntimeGenericContext *mrgctx = generic_info;
+
+ class = mrgctx->class_vtable->klass;
+ context.method_inst = mrgctx->method_inst;
+ g_assert (context.method_inst);
+ } else if ((ji->method->flags & METHOD_ATTRIBUTE_STATIC) || ji->method->klass->valuetype) {
+ MonoVTable *vtable = generic_info;
+
+ class = vtable->klass;
+ } else {
+ class = generic_info;
+ }
+
+ g_assert (!ji->method->klass->generic_container);
+ if (ji->method->klass->generic_class)
+ method_container_class = ji->method->klass->generic_class->container_class;
+ else
+ method_container_class = ji->method->klass;
+
+ /* class might refer to a subclass of ji->method's class */
+ while (class->generic_class && class->generic_class->container_class != method_container_class) {
+ class = class->parent;
+ g_assert (class);
+ }
+
+ if (class->generic_class || class->generic_container)
+ context.class_inst = mini_class_get_context (class)->class_inst;
+
+ if (class->generic_class)
+ g_assert (mono_class_has_parent_and_ignore_generics (class->generic_class->container_class, method_container_class));
+ else
+ g_assert (mono_class_has_parent_and_ignore_generics (class, method_container_class));
+
+ return context;
}
-#endif /* mono_find_jit_info */
+static MonoMethod*
+get_method_from_stack_frame (MonoJitInfo *ji, gpointer generic_info)
+{
+ MonoGenericContext context;
+ MonoMethod *method;
+
+ if (!ji->has_generic_jit_info || !mono_jit_info_get_generic_jit_info (ji)->has_this)
+ return ji->method;
+ context = get_generic_context_from_stack_frame (ji, generic_info);
+
+ method = mono_method_get_declaring_generic_method (ji->method);
+ method = mono_class_inflate_generic_method (method, &context);
+
+ return method;
+}
MonoString *
ves_icall_System_Exception_get_trace (MonoException *ex)
MonoArray *ta = ex->trace_ips;
int i, len;
GString *trace_str;
- char tmpaddr [256];
if (ta == NULL)
/* Exception is not thrown yet */
return NULL;
- len = mono_array_length (ta);
+ len = mono_array_length (ta) >> 1;
trace_str = g_string_new ("");
for (i = 0; i < len; i++) {
MonoJitInfo *ji;
- gpointer ip = mono_array_get (ta, gpointer, i);
+ gpointer ip = mono_array_get (ta, gpointer, i * 2 + 0);
+ gpointer generic_info = mono_array_get (ta, gpointer, i * 2 + 1);
ji = mono_jit_info_table_find (domain, ip);
if (ji == NULL) {
/* Unmanaged frame */
g_string_append_printf (trace_str, "in (unmanaged) %p\n", ip);
} else {
- char *source_location, *fname;
- gint32 address, iloffset;
+ gchar *location;
+ gint32 address;
+ MonoMethod *method = get_method_from_stack_frame (ji, generic_info);
address = (char *)ip - (char *)ji->code_start;
+ location = mono_debug_print_stack_frame (
+ method, address, ex->object.vtable->domain);
- source_location = mono_debug_source_location_from_address (ji->method, address, NULL, ex->object.vtable->domain);
- iloffset = mono_debug_il_offset_from_address (ji->method, address, ex->object.vtable->domain);
-
- if (iloffset < 0)
- sprintf (tmpaddr, "<0x%05x>", address);
- else
- sprintf (tmpaddr, "[0x%05x]", iloffset);
-
- fname = mono_method_full_name (ji->method, TRUE);
-
- if (source_location)
- g_string_append_printf (trace_str, "in %s (at %s) %s\n", tmpaddr, source_location, fname);
- else
- g_string_append_printf (trace_str, "in %s %s\n", tmpaddr, fname);
-
- g_free (fname);
- g_free (source_location);
+ g_string_append_printf (trace_str, "%s\n", location);
+ g_free (location);
}
}
MonoDomain *domain = mono_domain_get ();
MonoArray *res;
MonoArray *ta = exc->trace_ips;
+ MonoDebugSourceLocation *location;
int i, len;
if (ta == NULL) {
/* Exception is not thrown yet */
return mono_array_new (domain, mono_defaults.stack_frame_class, 0);
}
-
- len = mono_array_length (ta);
+
+ len = mono_array_length (ta) >> 1;
res = mono_array_new (domain, mono_defaults.stack_frame_class, len > skip ? len - skip : 0);
for (i = skip; i < len; i++) {
MonoJitInfo *ji;
MonoStackFrame *sf = (MonoStackFrame *)mono_object_new (domain, mono_defaults.stack_frame_class);
- gpointer ip = mono_array_get (ta, gpointer, i);
+ gpointer ip = mono_array_get (ta, gpointer, i * 2 + 0);
+ gpointer generic_info = mono_array_get (ta, gpointer, i * 2 + 1);
+ MonoMethod *method;
ji = mono_jit_info_table_find (domain, ip);
if (ji == NULL) {
g_assert (ji != NULL);
+ method = get_method_from_stack_frame (ji, generic_info);
if (ji->method->wrapper_type) {
char *s;
sf->method = NULL;
- s = mono_method_full_name (ji->method, TRUE);
+ s = mono_method_full_name (method, TRUE);
MONO_OBJECT_SETREF (sf, internal_method_name, mono_string_new (domain, s));
g_free (s);
}
else
- MONO_OBJECT_SETREF (sf, method, mono_method_get_object (domain, ji->method, NULL));
+ MONO_OBJECT_SETREF (sf, method, mono_method_get_object (domain, method, NULL));
sf->native_offset = (char *)ip - (char *)ji->code_start;
- sf->il_offset = mono_debug_il_offset_from_address (ji->method, sf->native_offset, domain);
+ /*
+ * mono_debug_lookup_source_location() returns both the file / line number information
+ * and the IL offset. Note that computing the IL offset is already an expensive
+ * operation, so we shouldn't call this method twice.
+ */
+ location = mono_debug_lookup_source_location (ji->method, sf->native_offset, domain);
+ if (location)
+ sf->il_offset = location->il_offset;
+ else
+ sf->il_offset = 0;
if (need_file_info) {
- gchar *filename;
-
- filename = mono_debug_source_location_from_address (ji->method, sf->native_offset, &sf->line, domain);
-
- if (filename)
- MONO_OBJECT_SETREF (sf, filename, mono_string_new (domain, filename));
- else
+ if (location && location->source_file) {
+ MONO_OBJECT_SETREF (sf, filename, mono_string_new (domain, location->source_file));
+ sf->line = location->row;
+ sf->column = location->column;
+ } else {
+ sf->line = sf->column = 0;
sf->filename = NULL;
- sf->column = 0;
-
- g_free (filename);
+ }
}
+ mono_debug_free_source_location (location);
mono_array_setref (res, i, sf);
}
void
mono_walk_stack (MonoDomain *domain, MonoJitTlsData *jit_tls, MonoContext *start_ctx, MonoStackFrameWalk func, gpointer user_data)
{
- MonoLMF *lmf = jit_tls->lmf;
+ MonoLMF *lmf = mono_get_lmf ();
MonoJitInfo *ji, rji;
gint native_offset;
gboolean managed;
ctx = *start_ctx;
- while (MONO_CONTEXT_GET_BP (&ctx) < jit_tls->end_of_stack) {
+ while (MONO_CONTEXT_GET_SP (&ctx) < jit_tls->end_of_stack) {
/*
* FIXME: mono_find_jit_info () will need to be able to return a different
* MonoDomain when apddomain transitions are found on the stack.
}
}
-#ifndef CUSTOM_STACK_WALK
-
void
mono_jit_walk_stack_from_ctx (MonoStackWalk func, MonoContext *start_ctx, gboolean do_il_offset, gpointer user_data)
{
MonoDomain *domain = mono_domain_get ();
MonoJitTlsData *jit_tls = TlsGetValue (mono_jit_tls_id);
- MonoLMF *lmf = jit_tls->lmf;
+ MonoLMF *lmf = mono_get_lmf ();
MonoJitInfo *ji, rji;
gint native_offset, il_offset;
gboolean managed;
#endif
}
- while (MONO_CONTEXT_GET_BP (&ctx) < jit_tls->end_of_stack) {
-
+ while (MONO_CONTEXT_GET_SP (&ctx) < jit_tls->end_of_stack) {
ji = mono_find_jit_info (domain, jit_tls, &rji, NULL, &ctx, &new_ctx, NULL, &lmf, &native_offset, &managed);
g_assert (ji);
if (ji == (gpointer)-1)
return;
- il_offset = do_il_offset ? mono_debug_il_offset_from_address (ji->method, native_offset, domain): -1;
+ if (do_il_offset) {
+ MonoDebugSourceLocation *source;
+
+ source = mono_debug_lookup_source_location (ji->method, native_offset, domain);
+ il_offset = source ? source->il_offset : -1;
+ mono_debug_free_source_location (source);
+ } else
+ il_offset = -1;
if (func (ji->method, native_offset, il_offset, managed, user_data))
return;
mono_jit_walk_stack_from_ctx (func, NULL, do_il_offset, user_data);
}
+void
+mono_jit_walk_stack_from_ctx_in_thread (MonoJitStackWalk func, MonoDomain *domain, MonoContext *start_ctx, gboolean do_il_offset, MonoInternalThread *thread, MonoLMF *lmf, gpointer user_data)
+{
+ MonoJitTlsData *jit_tls = thread->jit_data;
+ gint il_offset;
+ MonoContext ctx, new_ctx;
+ StackFrameInfo frame;
+#ifndef MONO_ARCH_HAVE_FIND_JIT_INFO_EXT
+ gint native_offset;
+ gboolean managed;
+ MonoJitInfo *ji, rji;
+#else
+ gboolean res;
+#endif
+
+ MONO_ARCH_CONTEXT_DEF
+
+ mono_arch_flush_register_windows ();
+
+ if (start_ctx) {
+ memcpy (&ctx, start_ctx, sizeof (MonoContext));
+ } else {
+#ifdef MONO_INIT_CONTEXT_FROM_CURRENT
+ MONO_INIT_CONTEXT_FROM_CURRENT (&ctx);
+#else
+ MONO_INIT_CONTEXT_FROM_FUNC (&ctx, mono_jit_walk_stack_from_ctx);
+#endif
+ g_assert (thread == mono_thread_internal_current ());
+ }
+
+ while (MONO_CONTEXT_GET_SP (&ctx) < jit_tls->end_of_stack) {
+ frame.lmf = lmf;
+#ifdef MONO_ARCH_HAVE_FIND_JIT_INFO_EXT
+ res = mono_find_jit_info_ext (domain, jit_tls, NULL, &ctx, &new_ctx, NULL, &lmf, &frame);
+ if (!res)
+ return;
+#else
+ ji = mono_find_jit_info (domain, jit_tls, &rji, NULL, &ctx, &new_ctx, NULL, &lmf, &native_offset, &managed);
+ g_assert (ji);
+ frame.type = FRAME_TYPE_MANAGED;
+ frame.ji = ji;
+ frame.managed = managed;
+ frame.native_offset = native_offset;
+
+ if (ji == (gpointer)-1)
+ return;
+#endif
+
+ if (do_il_offset && frame.ji) {
+ MonoDebugSourceLocation *source;
+
+ source = mono_debug_lookup_source_location (frame.ji->method, frame.native_offset, domain);
+ il_offset = source ? source->il_offset : -1;
+ mono_debug_free_source_location (source);
+ } else
+ il_offset = -1;
+
+ frame.il_offset = il_offset;
+
+ if (func (&frame, &ctx, user_data))
+ return;
+
+ ctx = new_ctx;
+ }
+}
+
+
MonoBoolean
ves_icall_get_frame_info (gint32 skip, MonoBoolean need_file_info,
MonoReflectionMethod **method,
{
MonoDomain *domain = mono_domain_get ();
MonoJitTlsData *jit_tls = TlsGetValue (mono_jit_tls_id);
- MonoLMF *lmf = jit_tls->lmf;
+ MonoLMF *lmf = mono_get_lmf ();
MonoJitInfo *ji, rji;
- MonoContext ctx, new_ctx;
+ MonoContext ctx, new_ctx, ji_ctx;
+ MonoDebugSourceLocation *location;
+ MonoMethod *last_method = NULL, *actual_method;
MONO_ARCH_CONTEXT_DEF;
mono_arch_flush_register_windows ();
+#ifdef MONO_INIT_CONTEXT_FROM_CURRENT
+ MONO_INIT_CONTEXT_FROM_CURRENT (&ctx);
+#else
MONO_INIT_CONTEXT_FROM_FUNC (&ctx, ves_icall_get_frame_info);
-
- skip++;
+#endif
do {
- ji = mono_find_jit_info (domain, jit_tls, &rji, NULL, &ctx, &new_ctx, NULL, &lmf, native_offset, NULL);
-
+ ji_ctx = ctx;
+ ji = mono_find_jit_info (domain, jit_tls, &rji, NULL, &ctx, &new_ctx, NULL, &lmf, (int*) native_offset, NULL);
ctx = new_ctx;
-
- if (!ji || ji == (gpointer)-1 || MONO_CONTEXT_GET_BP (&ctx) >= jit_tls->end_of_stack)
+
+ if (ji && ji != (gpointer)-1 &&
+ MONO_CONTEXT_GET_IP (&ctx) >= ji->code_start &&
+ (guint8*)MONO_CONTEXT_GET_IP (&ctx) < (guint8*)ji->code_start + ji->code_size) {
+ ji_ctx = ctx;
+ }
+
+ if (!ji || ji == (gpointer)-1 || MONO_CONTEXT_GET_SP (&ctx) >= jit_tls->end_of_stack)
return FALSE;
/* skip all wrappers ??*/
ji->method->wrapper_type == MONO_WRAPPER_XDOMAIN_INVOKE ||
ji->method->wrapper_type == MONO_WRAPPER_XDOMAIN_DISPATCH ||
ji->method->wrapper_type == MONO_WRAPPER_REMOTING_INVOKE_WITH_CHECK ||
- ji->method->wrapper_type == MONO_WRAPPER_REMOTING_INVOKE)
+ ji->method->wrapper_type == MONO_WRAPPER_REMOTING_INVOKE ||
+ ji->method->wrapper_type == MONO_WRAPPER_NATIVE_TO_MANAGED)
continue;
+ if (ji->method->wrapper_type == MONO_WRAPPER_MANAGED_TO_NATIVE && ji->method == last_method) {
+ /*
+ * FIXME: Native-to-managed wrappers sometimes show up twice.
+ * Probably the whole mono_find_jit_info () stuff needs to be fixed so this
+ * isn't needed.
+ */
+ continue;
+ }
+
+ last_method = ji->method;
+
skip--;
} while (skip >= 0);
- *method = mono_method_get_object (domain, ji->method, NULL);
- *iloffset = mono_debug_il_offset_from_address (ji->method, *native_offset, domain);
+ actual_method = get_method_from_stack_frame (ji, get_generic_info_from_stack_frame (ji, &ji_ctx));
- if (need_file_info) {
- gchar *filename;
-
- filename = mono_debug_source_location_from_address (ji->method, *native_offset, line, domain);
+ mono_gc_wbarrier_generic_store (method, (MonoObject*) mono_method_get_object (domain, actual_method, NULL));
- *file = filename? mono_string_new (domain, filename): NULL;
- *column = 0;
+ location = mono_debug_lookup_source_location (ji->method, *native_offset, domain);
+ if (location)
+ *iloffset = location->il_offset;
+ else
+ *iloffset = 0;
- g_free (filename);
+ if (need_file_info) {
+ if (location) {
+ mono_gc_wbarrier_generic_store (file, (MonoObject*) mono_string_new (domain, location->source_file));
+ *line = location->row;
+ *column = location->column;
+ } else {
+ *file = NULL;
+ *line = *column = 0;
+ }
}
+ mono_debug_free_source_location (location);
+
return TRUE;
}
-#endif /* CUSTOM_STACK_WALK */
-
typedef struct {
guint32 skips;
MonoSecurityFrame *frame;
MONO_ARCH_CONTEXT_DEF
+#ifdef MONO_INIT_CONTEXT_FROM_CURRENT
+ MONO_INIT_CONTEXT_FROM_CURRENT (&ctx);
+#else
MONO_INIT_CONTEXT_FROM_FUNC (&ctx, ves_icall_System_Security_SecurityFrame_GetSecurityFrame);
+#endif
+
+#if defined(__ia64__) || defined(__s390__) || defined(__s390x__)
+ skip--;
+#endif
si.skips = skip;
si.frame = NULL;
if (ss->count == ss->maximum)
grow_array (ss);
-
+
mono_array_setref (ss->stack, ss->count++, mono_declsec_create_frame (domain, ji));
/* continue down the stack */
MONO_ARCH_CONTEXT_DEF
+#ifdef MONO_INIT_CONTEXT_FROM_CURRENT
+ MONO_INIT_CONTEXT_FROM_CURRENT (&ctx);
+#else
MONO_INIT_CONTEXT_FROM_FUNC (&ctx, ves_icall_System_Security_SecurityFrame_GetSecurityStack);
+#endif
+
+#if defined(__ia64__) || defined(__s390__) || defined(__s390x__)
+ skip--;
+#endif
ss.skips = skip;
ss.count = 0;
return ss.stack;
}
-#ifndef CUSTOM_EXCEPTION_HANDLING
+static MonoClass*
+get_exception_catch_class (MonoJitExceptionInfo *ei, MonoJitInfo *ji, MonoContext *ctx)
+{
+ MonoClass *catch_class = ei->data.catch_class;
+ MonoType *inflated_type;
+ MonoGenericContext context;
+
+ if (!catch_class)
+ return NULL;
+
+ if (!ji->has_generic_jit_info || !mono_jit_info_get_generic_jit_info (ji)->has_this)
+ return catch_class;
+ context = get_generic_context_from_stack_frame (ji, get_generic_info_from_stack_frame (ji, ctx));
+
+ /* FIXME: we shouldn't inflate but instead put the
+ type in the rgctx and fetch it from there. It
+ might be a good idea to do this lazily, i.e. only
+ when the exception is actually thrown, so as not to
+ waste space for exception clauses which might never
+ be encountered. */
+ inflated_type = mono_class_inflate_generic_type (&catch_class->byval_arg, &context);
+ catch_class = mono_class_from_mono_type (inflated_type);
+ mono_metadata_free_type (inflated_type);
+
+ return catch_class;
+}
+
+/*
+ * mini_jit_info_table_find:
+ *
+ * Same as mono_jit_info_table_find, but search all the domains of the current thread
+ * if ADDR is not found in DOMAIN. The domain where the method was found is stored into
+ * OUT_DOMAIN if it is not NULL.
+ */
+MonoJitInfo*
+mini_jit_info_table_find (MonoDomain *domain, char *addr, MonoDomain **out_domain)
+{
+ MonoJitInfo *ji;
+ MonoInternalThread *t = mono_thread_internal_current ();
+ GSList *l;
+
+ if (out_domain)
+ *out_domain = NULL;
+
+ ji = mono_jit_info_table_find (domain, addr);
+ if (ji) {
+ if (out_domain)
+ *out_domain = domain;
+ return ji;
+ }
+
+ /* maybe it is shared code, so we also search in the root domain */
+ if (domain != mono_get_root_domain ()) {
+ ji = mono_jit_info_table_find (mono_get_root_domain (), addr);
+ if (ji) {
+ if (out_domain)
+ *out_domain = mono_get_root_domain ();
+ return ji;
+ }
+ }
+
+ for (l = t->appdomain_refs; l; l = l->next) {
+ if (l->data != domain) {
+ ji = mono_jit_info_table_find ((MonoDomain*)l->data, addr);
+ if (ji) {
+ if (out_domain)
+ *out_domain = (MonoDomain*)l->data;
+ return ji;
+ }
+ }
+ }
+
+ return NULL;
+}
/**
* mono_handle_exception_internal:
* @test_only: only test if the exception is caught, but dont call handlers
* @out_filter_idx: out parameter. if test_only is true, set to the index of
* the first filter clause which caught the exception.
+ * @resume: whenever to resume unwinding based on the state in MonoJitTlsData.
*/
static gboolean
-mono_handle_exception_internal (MonoContext *ctx, gpointer obj, gpointer original_ip, gboolean test_only, gint32 *out_filter_idx)
+mono_handle_exception_internal (MonoContext *ctx, gpointer obj, gpointer original_ip, gboolean test_only, gboolean resume, gint32 *out_filter_idx, MonoJitInfo **out_ji)
{
MonoDomain *domain = mono_domain_get ();
MonoJitInfo *ji, rji;
static int (*call_filter) (MonoContext *, gpointer) = NULL;
static void (*restore_context) (void *);
MonoJitTlsData *jit_tls = TlsGetValue (mono_jit_tls_id);
- MonoLMF *lmf = jit_tls->lmf;
+ MonoLMF *lmf = mono_get_lmf ();
MonoArray *initial_trace_ips = NULL;
GList *trace_ips = NULL;
MonoException *mono_ex;
gboolean stack_overflow = FALSE;
MonoContext initial_ctx;
int frame_count = 0;
- gboolean gc_disabled = FALSE;
gboolean has_dynamic_methods = FALSE;
gint32 filter_idx, first_filter_idx;
-
- /*
- * This function might execute on an alternate signal stack, and Boehm GC
- * can't handle that.
- * Also, since the altstack is small, stack space intensive operations like
- * JIT compilation should be avoided.
- */
- if (IS_ON_SIGALTSTACK (jit_tls)) {
- /*
- * FIXME: disabling/enabling GC while already on a signal stack might
- * not be safe either.
- */
- /* Have to reenable it later */
- gc_disabled = TRUE;
- mono_gc_disable ();
- }
g_assert (ctx != NULL);
if (!obj) {
obj = (MonoObject *)ex;
}
+ if (!test_only)
+ mono_debugger_agent_handle_exception (obj, ctx);
+
/*
* Allocate a new exception object instead of the preconstructed ones.
- * We can't do this in sigsegv_signal_handler, since GC is not yet
- * disabled.
*/
if (obj == domain->stack_overflow_ex) {
- obj = mono_get_exception_stack_overflow ();
+ /*
+ * It is not a good idea to try and put even more pressure on the little stack available.
+ * obj = mono_get_exception_stack_overflow ();
+ */
stack_overflow = TRUE;
}
else if (obj == domain->null_reference_ex) {
mono_ex = NULL;
}
+ if (mono_ex && jit_tls->class_cast_from && !strcmp (mono_ex->object.vtable->klass->name, "InvalidCastException")) {
+ char *from_name = mono_type_get_full_name (jit_tls->class_cast_from);
+ char *to_name = mono_type_get_full_name (jit_tls->class_cast_to);
+ char *msg = g_strdup_printf ("Unable to cast object of type '%s' to type '%s'.", from_name, to_name);
+ mono_ex->message = mono_string_new (domain, msg);
+ g_free (from_name);
+ g_free (to_name);
+ g_free (msg);
+ }
+
if (!call_filter)
- call_filter = mono_arch_get_call_filter ();
+ call_filter = mono_get_call_filter ();
if (!restore_context)
- restore_context = mono_arch_get_restore_context ();
+ restore_context = mono_get_restore_context ();
g_assert (jit_tls->end_of_stack);
g_assert (jit_tls->abort_func);
if (!test_only) {
MonoContext ctx_cp = *ctx;
if (mono_trace_is_enabled ())
- g_print ("EXCEPTION handling: %s\n", mono_object_class (obj)->name);
- if (!mono_handle_exception_internal (&ctx_cp, obj, original_ip, TRUE, &first_filter_idx)) {
+ g_print ("[%p:] EXCEPTION handling: %s\n", (void*)GetCurrentThreadId (), mono_object_class (obj)->name);
+ mono_profiler_exception_thrown (obj);
+ if (!mono_handle_exception_internal (&ctx_cp, obj, original_ip, TRUE, FALSE, &first_filter_idx, out_ji)) {
if (mono_break_on_exc)
G_BREAKPOINT ();
+ // FIXME: This runs managed code so it might cause another stack overflow when
+ // we are handling a stack overflow
+ mono_debugger_agent_handle_unhandled_exception (obj, ctx);
mono_unhandled_exception (obj);
-
- if (mono_debugger_unhandled_exception (original_ip, MONO_CONTEXT_GET_SP (ctx), obj)) {
- /*
- * If this returns true, then we're running inside the
- * Mono Debugger and the debugger wants us to restore the
- * context and continue (normally, the debugger inserts
- * a breakpoint on the `original_ip', so it regains control
- * immediately after restoring the context).
- */
- MONO_CONTEXT_SET_IP (ctx, original_ip);
- restore_context (ctx);
- g_assert_not_reached ();
- }
}
}
if (out_filter_idx)
*out_filter_idx = -1;
+ if (out_ji)
+ *out_ji = NULL;
filter_idx = 0;
initial_ctx = *ctx;
memset (&rji, 0, sizeof (rji));
g_assert_not_reached ();
}
+ if (ji != (gpointer)-1 && !(ji->code_start <= MONO_CONTEXT_GET_IP (ctx) && (((guint8*)ji->code_start + ji->code_size >= (guint8*)MONO_CONTEXT_GET_IP (ctx))))) {
+ /*
+ * The exception was raised in native code and we got back to managed code
+ * using the LMF.
+ */
+ *ctx = new_ctx;
+ continue;
+ }
+
if (ji != (gpointer)-1) {
frame_count ++;
//printf ("M: %s %d %d.\n", mono_method_full_name (ji->method, TRUE), frame_count, test_only);
*/
if (!initial_trace_ips && (frame_count < 1000)) {
trace_ips = g_list_prepend (trace_ips, MONO_CONTEXT_GET_IP (ctx));
+ trace_ips = g_list_prepend (trace_ips,
+ get_generic_info_from_stack_frame (ji, ctx));
}
}
has_dynamic_methods = TRUE;
if (stack_overflow)
- free_stack = (guint8*)(MONO_CONTEXT_GET_BP (ctx)) - (guint8*)(MONO_CONTEXT_GET_BP (&initial_ctx));
+#ifndef MONO_ARCH_STACK_GROWS_UP
+ free_stack = (guint8*)(MONO_CONTEXT_GET_SP (ctx)) - (guint8*)(MONO_CONTEXT_GET_SP (&initial_ctx));
+#else
+ free_stack = (guint8*)(MONO_CONTEXT_GET_SP (&initial_ctx)) - (guint8*)(MONO_CONTEXT_GET_SP (ctx));
+#endif
else
free_stack = 0xffffff;
MonoJitExceptionInfo *ei = &ji->clauses [i];
gboolean filtered = FALSE;
-#ifdef __s390__
+#if defined(__s390__)
+ /*
+ * This is required in cases where a try block starts immediately after
+ * a call which causes an exception. Testcase: tests/exception8.cs.
+ * FIXME: Clean this up.
+ */
if (ei->try_start < MONO_CONTEXT_GET_IP (ctx) &&
#else
if (ei->try_start <= MONO_CONTEXT_GET_IP (ctx) &&
#endif
MONO_CONTEXT_GET_IP (ctx) <= ei->try_end) {
/* catch block */
+ MonoClass *catch_class = get_exception_catch_class (ei, ji, ctx);
if ((ei->flags == MONO_EXCEPTION_CLAUSE_NONE) || (ei->flags == MONO_EXCEPTION_CLAUSE_FILTER)) {
- /* store the exception object in cfg->excvar */
- g_assert (ei->exvar_offset);
- *((gpointer *)(gpointer)((char *)MONO_CONTEXT_GET_BP (ctx) + ei->exvar_offset)) = obj;
+ if (ji->from_llvm) {
+#ifdef MONO_CONTEXT_SET_LLVM_EXC_REG
+ MONO_CONTEXT_SET_LLVM_EXC_REG (ctx, obj);
+#else
+ g_assert_not_reached ();
+#endif
+ } else {
+ /* store the exception object in bp + ei->exvar_offset */
+ *((gpointer *)(gpointer)((char *)MONO_CONTEXT_GET_BP (ctx) + ei->exvar_offset)) = obj;
+ }
}
if (ei->flags == MONO_EXCEPTION_CLAUSE_FILTER) {
- // mono_debugger_handle_exception (ei->data.filter, MONO_CONTEXT_GET_SP (ctx), obj);
if (test_only) {
+ mono_perfcounters->exceptions_filters++;
+ mono_debugger_call_exception_handler (ei->data.filter, MONO_CONTEXT_GET_SP (ctx), obj);
filtered = call_filter (ctx, ei->data.filter);
if (filtered && out_filter_idx)
*out_filter_idx = filter_idx;
+ if (out_ji)
+ *out_ji = ji;
}
else {
/*
}
if ((ei->flags == MONO_EXCEPTION_CLAUSE_NONE &&
- mono_object_isinst (obj, ei->data.catch_class)) || filtered) {
+ mono_object_isinst (obj, catch_class)) || filtered) {
if (test_only) {
if (mono_ex && !initial_trace_ips) {
trace_ips = g_list_reverse (trace_ips);
}
g_list_free (trace_ips);
- if (gc_disabled)
- mono_gc_enable ();
return TRUE;
}
if (mono_trace_is_enabled () && mono_trace_eval (ji->method))
g_print ("EXCEPTION: catch found at clause %d of %s\n", i, mono_method_full_name (ji->method, TRUE));
- mono_debugger_handle_exception (ei->handler_start, MONO_CONTEXT_GET_SP (ctx), obj);
+ mono_profiler_exception_clause_handler (ji->method, ei->flags, i);
+ mono_debugger_call_exception_handler (ei->handler_start, MONO_CONTEXT_GET_SP (ctx), obj);
MONO_CONTEXT_SET_IP (ctx, ei->handler_start);
- jit_tls->lmf = lmf;
+ *(mono_get_lmf_addr ()) = lmf;
+ mono_perfcounters->exceptions_depth += frame_count;
+ if (obj == domain->stack_overflow_ex)
+ jit_tls->handling_stack_ovf = FALSE;
- if (gc_disabled)
- mono_gc_enable ();
return 0;
}
if (!test_only && ei->try_start <= MONO_CONTEXT_GET_IP (ctx) &&
MONO_CONTEXT_GET_IP (ctx) < ei->try_end &&
- (ei->flags & MONO_EXCEPTION_CLAUSE_FINALLY)) {
+ (ei->flags == MONO_EXCEPTION_CLAUSE_FAULT)) {
if (mono_trace_is_enabled () && mono_trace_eval (ji->method))
- g_print ("EXCEPTION: finally clause %d of %s\n", i, mono_method_full_name (ji->method, TRUE));
- mono_debugger_handle_exception (ei->handler_start, MONO_CONTEXT_GET_SP (ctx), obj);
+ g_print ("EXCEPTION: fault clause %d of %s\n", i, mono_method_full_name (ji->method, TRUE));
+ mono_profiler_exception_clause_handler (ji->method, ei->flags, i);
+ mono_debugger_call_exception_handler (ei->handler_start, MONO_CONTEXT_GET_SP (ctx), obj);
call_filter (ctx, ei->handler_start);
}
+ if (!test_only && ei->try_start <= MONO_CONTEXT_GET_IP (ctx) &&
+ MONO_CONTEXT_GET_IP (ctx) < ei->try_end &&
+ (ei->flags == MONO_EXCEPTION_CLAUSE_FINALLY)) {
+ if (mono_trace_is_enabled () && mono_trace_eval (ji->method))
+ g_print ("EXCEPTION: finally clause %d of %s\n", i, mono_method_full_name (ji->method, TRUE));
+ mono_profiler_exception_clause_handler (ji->method, ei->flags, i);
+ mono_debugger_call_exception_handler (ei->handler_start, MONO_CONTEXT_GET_SP (ctx), obj);
+ mono_perfcounters->exceptions_finallys++;
+ *(mono_get_lmf_addr ()) = lmf;
+ if (ji->from_llvm) {
+ /*
+ * LLVM compiled finally handlers follow the design
+ * of the c++ ehabi, i.e. they call a resume function
+ * at the end instead of returning to the caller.
+ * So save the exception handling state,
+ * mono_resume_unwind () will call us again to continue
+ * the unwinding.
+ */
+ MONO_CONTEXT_SET_IP (ctx, ei->handler_start);
+ *(mono_get_lmf_addr ()) = lmf;
+ jit_tls->ex_ctx = new_ctx;
+ jit_tls->ex_obj = obj;
+ return 0;
+ } else {
+ call_filter (ctx, ei->handler_start);
+ }
+ }
}
}
}
+ if (!test_only)
+ mono_profiler_exception_method_leave (ji->method);
}
*ctx = new_ctx;
if (ji == (gpointer)-1) {
- if (gc_disabled)
- mono_gc_enable ();
if (!test_only) {
- jit_tls->lmf = lmf;
-
- if (IS_ON_SIGALTSTACK (jit_tls)) {
- /* Switch back to normal stack */
- if (stack_overflow) {
- /* Free up some stack space */
- MONO_CONTEXT_SET_SP (&initial_ctx, (gssize)(MONO_CONTEXT_GET_SP (&initial_ctx)) + (64 * 1024));
- g_assert ((gssize)MONO_CONTEXT_GET_SP (&initial_ctx) < (gssize)jit_tls->end_of_stack);
- }
- MONO_CONTEXT_SET_IP (&initial_ctx, (gssize)jit_tls->abort_func);
- restore_context (&initial_ctx);
- }
- else
- jit_tls->abort_func (obj);
+ *(mono_get_lmf_addr ()) = lmf;
+
+ jit_tls->abort_func (obj);
g_assert_not_reached ();
} else {
if (mono_ex && !initial_trace_ips) {
g_assert_not_reached ();
}
+/*
+ * mono_debugger_handle_exception:
+ *
+ * Notify the debugger about exceptions. Returns TRUE if the debugger wants us to stop
+ * at the exception and FALSE to resume with the normal exception handling.
+ *
+ * The arch code is responsible to setup @ctx in a way that MONO_CONTEXT_GET_IP () and
+ * MONO_CONTEXT_GET_SP () point to the throw instruction; ie. before executing the
+ * `callq throw' instruction.
+ */
+gboolean
+mono_debugger_handle_exception (MonoContext *ctx, MonoObject *obj)
+{
+ MonoDebuggerExceptionAction action;
+
+ if (!mono_debug_using_mono_debugger ())
+ return FALSE;
+
+ if (!obj) {
+ MonoException *ex = mono_get_exception_null_reference ();
+ MONO_OBJECT_SETREF (ex, message, mono_string_new (mono_domain_get (), "Object reference not set to an instance of an object"));
+ obj = (MonoObject *)ex;
+ }
+
+ action = _mono_debugger_throw_exception (MONO_CONTEXT_GET_IP (ctx), MONO_CONTEXT_GET_SP (ctx), obj);
+
+ if (action == MONO_DEBUGGER_EXCEPTION_ACTION_STOP) {
+ /*
+ * The debugger wants us to stop on the `throw' instruction.
+ * By the time we get here, it already inserted a breakpoint there.
+ */
+ return TRUE;
+ } else if (action == MONO_DEBUGGER_EXCEPTION_ACTION_STOP_UNHANDLED) {
+ MonoContext ctx_cp = *ctx;
+ MonoJitInfo *ji = NULL;
+ gboolean ret;
+
+ /*
+ * The debugger wants us to stop only if this exception is user-unhandled.
+ */
+
+ ret = mono_handle_exception_internal (&ctx_cp, obj, MONO_CONTEXT_GET_IP (ctx), TRUE, FALSE, NULL, &ji);
+ if (ret && (ji != NULL) && (ji->method->wrapper_type == MONO_WRAPPER_RUNTIME_INVOKE)) {
+ /*
+ * The exception is handled in a runtime-invoke wrapper, that means that it's unhandled
+ * inside the method being invoked, so we handle it like a user-unhandled exception.
+ */
+ ret = FALSE;
+ }
+
+ if (!ret) {
+ /*
+ * The exception is user-unhandled - tell the debugger to stop.
+ */
+ return _mono_debugger_unhandled_exception (MONO_CONTEXT_GET_IP (ctx), MONO_CONTEXT_GET_SP (ctx), obj);
+ }
+
+ /*
+ * The exception is catched somewhere - resume with the normal exception handling and don't
+ * stop in the debugger.
+ */
+ }
+
+ return FALSE;
+}
+
/**
* mono_debugger_run_finally:
* @start_ctx: saved processor state
static int (*call_filter) (MonoContext *, gpointer) = NULL;
MonoDomain *domain = mono_domain_get ();
MonoJitTlsData *jit_tls = TlsGetValue (mono_jit_tls_id);
- MonoLMF *lmf = jit_tls->lmf;
+ MonoLMF *lmf = mono_get_lmf ();
MonoContext ctx, new_ctx;
MonoJitInfo *ji, rji;
int i;
return;
if (!call_filter)
- call_filter = mono_arch_get_call_filter ();
+ call_filter = mono_get_call_filter ();
for (i = 0; i < ji->num_clauses; i++) {
MonoJitExceptionInfo *ei = &ji->clauses [i];
gboolean
mono_handle_exception (MonoContext *ctx, gpointer obj, gpointer original_ip, gboolean test_only)
{
- return mono_handle_exception_internal (ctx, obj, original_ip, test_only, NULL);
-}
+ if (!test_only)
+ mono_perfcounters->exceptions_thrown++;
-#endif /* CUSTOM_EXCEPTION_HANDLING */
+ return mono_handle_exception_internal (ctx, obj, original_ip, test_only, FALSE, NULL, NULL);
+}
#ifdef MONO_ARCH_SIGSEGV_ON_ALTSTACK
+#ifndef MONO_ARCH_USE_SIGACTION
+#error "Can't use sigaltstack without sigaction"
+#endif
+
+#define ALIGN_TO(val,align) ((((guint64)val) + ((align) - 1)) & ~((align) - 1))
+
void
mono_setup_altstack (MonoJitTlsData *tls)
{
- pthread_t self = pthread_self();
- pthread_attr_t attr;
size_t stsize = 0;
struct sigaltstack sa;
guint8 *staddr = NULL;
- guint8 *current = (guint8*)&staddr;
if (mono_running_on_valgrind ())
return;
- /* Determine stack boundaries */
- pthread_attr_init( &attr );
-#ifdef HAVE_PTHREAD_GETATTR_NP
- pthread_getattr_np( self, &attr );
-#else
-#ifdef HAVE_PTHREAD_ATTR_GET_NP
- pthread_attr_get_np( self, &attr );
-#elif defined(sun)
- pthread_attr_getstacksize( &attr, &stsize );
-#else
-#error "Not implemented"
-#endif
-#endif
-#ifndef sun
- pthread_attr_getstack( &attr, (void**)&staddr, &stsize );
-#endif
+ mono_thread_get_stack_bounds (&staddr, &stsize);
g_assert (staddr);
- g_assert ((current > staddr) && (current < staddr + stsize));
-
tls->end_of_stack = staddr + stsize;
+ /*g_print ("thread %p, stack_base: %p, stack_size: %d\n", (gpointer)pthread_self (), staddr, stsize);*/
+
+ tls->stack_ovf_guard_base = staddr + mono_pagesize ();
+ tls->stack_ovf_guard_size = ALIGN_TO (8 * 4096, mono_pagesize ());
+
+ if (mono_mprotect (tls->stack_ovf_guard_base, tls->stack_ovf_guard_size, MONO_MMAP_NONE)) {
+ /* mprotect can fail for the main thread stack */
+ 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);
+ g_assert (gaddr == tls->stack_ovf_guard_base);
+ }
+
/*
* threads created by nptl does not seem to have a guard page, and
* since the main thread is not created by us, we can't even set one.
* Increasing stsize fools the SIGSEGV signal handler into thinking this
* is a stack overflow exception.
*/
- tls->stack_size = stsize + getpagesize ();
+ tls->stack_size = stsize + mono_pagesize ();
/* Setup an alternate signal stack */
- tls->signal_stack = mmap (0, MONO_ARCH_SIGNAL_STACK_SIZE, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
+ tls->signal_stack = mono_valloc (0, MONO_ARCH_SIGNAL_STACK_SIZE, MONO_MMAP_READ|MONO_MMAP_WRITE|MONO_MMAP_PRIVATE|MONO_MMAP_ANON);
tls->signal_stack_size = MONO_ARCH_SIGNAL_STACK_SIZE;
g_assert (tls->signal_stack);
g_assert (err == 0);
if (tls->signal_stack)
- munmap (tls->signal_stack, MONO_ARCH_SIGNAL_STACK_SIZE);
+ mono_vfree (tls->signal_stack, MONO_ARCH_SIGNAL_STACK_SIZE);
+}
+
+#else /* !MONO_ARCH_SIGSEGV_ON_ALTSTACK */
+
+void
+mono_setup_altstack (MonoJitTlsData *tls)
+{
+}
+
+void
+mono_free_altstack (MonoJitTlsData *tls)
+{
}
#endif /* MONO_ARCH_SIGSEGV_ON_ALTSTACK */
+static gboolean
+try_restore_stack_protection (MonoJitTlsData *jit_tls, int extra_bytes)
+{
+ gint32 unprotect_size = jit_tls->stack_ovf_guard_size;
+ /* we need to leave some room for throwing the exception */
+ while (unprotect_size >= 0 && (char*)jit_tls->stack_ovf_guard_base + unprotect_size > ((char*)&unprotect_size - extra_bytes))
+ unprotect_size -= mono_pagesize ();
+ /* at this point we could try and build a new domain->stack_overflow_ex, but only if there
+ * is sufficient stack
+ */
+ //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);
+ if (unprotect_size)
+ mono_mprotect (jit_tls->stack_ovf_guard_base, unprotect_size, MONO_MMAP_NONE);
+ return unprotect_size == jit_tls->stack_ovf_guard_size;
+}
+
+static void
+try_more_restore (void)
+{
+ MonoJitTlsData *jit_tls = TlsGetValue (mono_jit_tls_id);
+ if (try_restore_stack_protection (jit_tls, 500))
+ jit_tls->restore_stack_prot = NULL;
+}
+
+static void
+restore_stack_protection (void)
+{
+ MonoJitTlsData *jit_tls = TlsGetValue (mono_jit_tls_id);
+ MonoException *ex = mono_domain_get ()->stack_overflow_ex;
+ /* if we can't restore the stack protection, keep a callback installed so
+ * we'll try to restore as much stack as we can at each return from unmanaged
+ * code.
+ */
+ if (try_restore_stack_protection (jit_tls, 4096))
+ jit_tls->restore_stack_prot = NULL;
+ else
+ jit_tls->restore_stack_prot = try_more_restore_tramp;
+ /* here we also throw a stack overflow exception */
+ ex->trace_ips = NULL;
+ ex->stack_trace = NULL;
+ mono_raise_exception (ex);
+}
+
+gpointer
+mono_altstack_restore_prot (mgreg_t *regs, guint8 *code, gpointer *tramp_data, guint8* tramp)
+{
+ void (*func)(void) = (gpointer)tramp_data;
+ func ();
+ return NULL;
+}
+
+gboolean
+mono_handle_soft_stack_ovf (MonoJitTlsData *jit_tls, MonoJitInfo *ji, void *ctx, guint8* fault_addr)
+{
+ /* we got a stack overflow in the soft-guard pages
+ * There are two cases:
+ * 1) managed code caused the overflow: we unprotect the soft-guard page
+ * and let the arch-specific code trigger the exception handling mechanism
+ * in the thread stack. The soft-guard pages will be protected again as the stack is unwound.
+ * 2) unmanaged code caused the overflow: we unprotect the soft-guard page
+ * and hope we can continue with those enabled, at least until the hard-guard page
+ * is hit. The alternative to continuing here is to just print a message and abort.
+ * We may add in the future the code to protect the pages again in the codepath
+ * when we return from unmanaged to managed code.
+ */
+ if (jit_tls->stack_ovf_guard_size && fault_addr >= (guint8*)jit_tls->stack_ovf_guard_base &&
+ fault_addr < (guint8*)jit_tls->stack_ovf_guard_base + jit_tls->stack_ovf_guard_size) {
+ /* we unprotect the minimum amount we can */
+ guint32 guard_size;
+ gboolean handled = FALSE;
+
+ guard_size = jit_tls->stack_ovf_guard_size - (mono_pagesize () * SIZEOF_VOID_P / 4);
+ while (guard_size && fault_addr < (guint8*)jit_tls->stack_ovf_guard_base + guard_size) {
+ guard_size -= mono_pagesize ();
+ }
+ guard_size = jit_tls->stack_ovf_guard_size - guard_size;
+ /*fprintf (stderr, "unprotecting: %d\n", guard_size);*/
+ 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);
+#ifdef MONO_ARCH_SIGSEGV_ON_ALTSTACK
+ if (ji) {
+ mono_arch_handle_altstack_exception (ctx, fault_addr, TRUE);
+ handled = TRUE;
+ }
+#endif
+ if (!handled) {
+ /* We print a message: after this even managed stack overflows
+ * may crash the runtime
+ */
+ fprintf (stderr, "Stack overflow in unmanaged: IP: %p, fault addr: %p\n", mono_arch_ip_from_context (ctx), fault_addr);
+ if (!jit_tls->handling_stack_ovf) {
+ jit_tls->restore_stack_prot = restore_stack_protection_tramp;
+ jit_tls->handling_stack_ovf = 1;
+ } else {
+ /*fprintf (stderr, "Already handling stack overflow\n");*/
+ }
+ }
+ return TRUE;
+ }
+ return FALSE;
+}
+
static gboolean
print_stack_frame (MonoMethod *method, gint32 native_offset, gint32 il_offset, gboolean managed, gpointer data)
{
FILE *stream = (FILE*)data;
if (method) {
- char *fname = mono_method_full_name (method, TRUE);
+ gchar *location = mono_debug_print_stack_frame (method, native_offset, mono_domain_get ());
+ fprintf (stream, " %s\n", location);
+ g_free (location);
+ } else
+ fprintf (stream, " at <unknown> <0x%05x>\n", native_offset);
+
+ return FALSE;
+}
- if (il_offset != -1) {
- gchar *source_location = mono_debug_source_location_from_address (method, native_offset, NULL, mono_domain_get ());
+static G_GNUC_UNUSED gboolean
+print_stack_frame_to_string (MonoMethod *method, gint32 native_offset, gint32 il_offset, gboolean managed,
+ gpointer data)
+{
+ GString *p = (GString*)data;
- if (source_location)
- fprintf (stream, "in %s (at %s)\n", fname, source_location);
- else
- fprintf (stream, "in %s [IL 0x%lx]\n", fname, (long)il_offset);
- } else
- fprintf (stream, "in %s <0x%lx>\n", fname, (long)native_offset);
- g_free (fname);
+ if (method) {
+ gchar *location = mono_debug_print_stack_frame (method, native_offset, mono_domain_get ());
+ g_string_append_printf (p, " %s\n", location);
+ g_free (location);
} else
- fprintf (stream, "in <unknown> <%lx>\n", (long)native_offset);
+ g_string_append_printf (p, " at <unknown> <0x%05x>\n", native_offset);
return FALSE;
}
+static gboolean handling_sigsegv = FALSE;
+
/*
* mono_handle_native_sigsegv:
*
* information and aborting.
*/
void
-mono_handle_native_sigsegv (void *ctx)
+mono_handle_native_sigsegv (int signal, void *ctx)
{
- /*
- * A SIGSEGV indicates something went very wrong so we can no longer depend
- * on anything working. So try to print out lots of diagnostics, starting
- * with ones which have a greater change of working.
- */
- fprintf (stderr,
- "\n"
- "=================================================================\n"
- "Got a SIGSEGV while executing native code. This usually indicates\n"
- "a fatal error in the mono runtime or one of the native libraries \n"
- "used by your application.\n"
- "=================================================================\n"
- "\n");
+#ifdef MONO_ARCH_USE_SIGACTION
+ struct sigaction sa;
+#endif
+ MonoJitTlsData *jit_tls = TlsGetValue (mono_jit_tls_id);
+
+ if (handling_sigsegv)
+ return;
- fprintf (stderr, "Stacktrace:\n\n");
+ if (mini_get_debug_options ()->suspend_on_sigsegv) {
+ fprintf (stderr, "Received SIGSEGV, suspending...");
+ while (1)
+ ;
+ }
- mono_jit_walk_stack (print_stack_frame, TRUE, stderr);
+ /* To prevent infinite loops when the stack walk causes a crash */
+ handling_sigsegv = TRUE;
- fflush (stderr);
+ /* !jit_tls means the thread was not registered with the runtime */
+ if (jit_tls && mono_thread_internal_current ()) {
+ fprintf (stderr, "Stacktrace:\n\n");
+
+ mono_jit_walk_stack (print_stack_frame, TRUE, stderr);
+
+ fflush (stderr);
+ }
#ifdef HAVE_BACKTRACE_SYMBOLS
{
void *array [256];
char **names;
int i, size;
+ const char *signal_str = (signal == SIGSEGV) ? "SIGSEGV" : "SIGABRT";
fprintf (stderr, "\nNative stacktrace:\n\n");
fprintf (stderr, "\t%s\n", names [i]);
}
free (names);
- }
fflush (stderr);
+
+ /* Try to get more meaningful information using gdb */
+
+#if !defined(HOST_WIN32) && defined(HAVE_SYS_SYSCALL_H) && defined(SYS_fork)
+ if (!mini_get_debug_options ()->no_gdb_backtrace && !mono_debug_using_mono_debugger ()) {
+ /* From g_spawn_command_line_sync () in eglib */
+ int res;
+ int stdout_pipe [2] = { -1, -1 };
+ pid_t pid;
+ int status;
+ char buffer [1024];
+
+ res = pipe (stdout_pipe);
+ g_assert (res != -1);
+
+ //pid = fork ();
+ /*
+ * glibc fork acquires some locks, so if the crash happened inside malloc/free,
+ * it will deadlock. Call the syscall directly instead.
+ */
+ pid = mono_runtime_syscall_fork ();
+
+ if (pid == 0) {
+ close (stdout_pipe [0]);
+ dup2 (stdout_pipe [1], STDOUT_FILENO);
+
+ for (i = getdtablesize () - 1; i >= 3; i--)
+ close (i);
+
+ if (!mono_gdb_render_native_backtraces ())
+ close (STDOUT_FILENO);
+
+ exit (1);
+ }
+
+ close (stdout_pipe [1]);
+
+ fprintf (stderr, "\nDebug info from gdb:\n\n");
+
+ while (1) {
+ int nread = read (stdout_pipe [0], buffer, 1024);
+
+ if (nread <= 0)
+ break;
+ write (STDERR_FILENO, buffer, nread);
+ }
+
+ waitpid (pid, &status, WNOHANG);
+ }
+#endif
+ /*
+ * A SIGSEGV indicates something went very wrong so we can no longer depend
+ * on anything working. So try to print out lots of diagnostics, starting
+ * with ones which have a greater chance of working.
+ */
+ fprintf (stderr,
+ "\n"
+ "=================================================================\n"
+ "Got a %s while executing native code. This usually indicates\n"
+ "a fatal error in the mono runtime or one of the native libraries \n"
+ "used by your application.\n"
+ "=================================================================\n"
+ "\n", signal_str);
+
+ }
+#endif
+
+#ifdef MONO_ARCH_USE_SIGACTION
+
+ /* Remove our SIGABRT handler */
+ sa.sa_handler = SIG_DFL;
+ sigemptyset (&sa.sa_mask);
+ sa.sa_flags = 0;
+
+ g_assert (sigaction (SIGABRT, &sa, NULL) != -1);
+
#endif
abort ();
}
-/*
- * mono_print_thread_dump:
- *
- * Print information about the current thread to stdout.
- */
-void
-mono_print_thread_dump (void *sigctx)
+static void
+mono_print_thread_dump_internal (void *sigctx, MonoContext *start_ctx)
{
- MonoThread *thread = mono_thread_current ();
-#ifdef __i386__
+ MonoInternalThread *thread = mono_thread_internal_current ();
+#if defined(__i386__) || defined(__x86_64__)
MonoContext ctx;
#endif
- char *name;
+ GString* text = g_string_new (0);
+ char *name, *wapi_desc;
GError *error = NULL;
if (thread->name) {
name = g_utf16_to_utf8 (thread->name, thread->name_len, NULL, NULL, &error);
g_assert (!error);
- fprintf (stdout, "\n\"%s\"", name);
+ g_string_append_printf (text, "\n\"%s\"", name);
g_free (name);
}
+ else if (thread->threadpool_thread)
+ g_string_append (text, "\n\"<threadpool thread>\"");
else
- fprintf (stdout, "\n\"\"");
+ g_string_append (text, "\n\"<unnamed thread>\"");
- fprintf (stdout, " tid=0x%p this=0x%p:\n", (gpointer)(gsize)thread->tid, thread);
+#ifndef HOST_WIN32
+ wapi_desc = wapi_current_thread_desc ();
+ g_string_append_printf (text, " tid=0x%p this=0x%p %s\n", (gpointer)(gsize)thread->tid, thread, wapi_desc);
+ free (wapi_desc);
+#endif
- /* FIXME: */
-#ifdef __i386__
- mono_arch_sigctx_to_monoctx (sigctx, &ctx);
+#ifdef MONO_ARCH_HAVE_SIGCTX_TO_MONOCTX
+ if (start_ctx) {
+ memcpy (&ctx, start_ctx, sizeof (MonoContext));
+ } else if (!sigctx)
+ MONO_INIT_CONTEXT_FROM_FUNC (&ctx, mono_print_thread_dump);
+ else
+ mono_arch_sigctx_to_monoctx (sigctx, &ctx);
- mono_jit_walk_stack_from_ctx (print_stack_frame, &ctx, TRUE, stdout);
+ mono_jit_walk_stack_from_ctx (print_stack_frame_to_string, &ctx, TRUE, text);
#else
printf ("\t<Stack traces in thread dumps not supported on this platform>\n");
#endif
+ fprintf (stdout, "%s", text->str);
+ g_string_free (text, TRUE);
fflush (stdout);
}
+
+/*
+ * mono_print_thread_dump:
+ *
+ * Print information about the current thread to stdout.
+ * SIGCTX can be NULL, allowing this to be called from gdb.
+ */
+void
+mono_print_thread_dump (void *sigctx)
+{
+ mono_print_thread_dump_internal (sigctx, NULL);
+}
+
+void
+mono_print_thread_dump_from_ctx (MonoContext *ctx)
+{
+ mono_print_thread_dump_internal (NULL, ctx);
+}
+
+/*
+ * mono_resume_unwind:
+ *
+ * This is called by code at the end of LLVM compiled finally clauses to continue
+ * unwinding.
+ */
+void
+mono_resume_unwind (void)
+{
+ MonoJitTlsData *jit_tls = TlsGetValue (mono_jit_tls_id);
+ static void (*restore_context) (MonoContext *);
+ MonoContext ctx;
+
+ memcpy (&ctx, &jit_tls->ex_ctx, sizeof (MonoContext));
+
+ mono_handle_exception_internal (&ctx, jit_tls->ex_obj, NULL, FALSE, TRUE, NULL, NULL);
+
+ if (!restore_context)
+ restore_context = mono_get_restore_context ();
+
+ restore_context (&ctx);
+}
projects / mono.git / blobdiff