-/*
- * handle.h: Handle to object in native code
+/**
+ * \file
+ * Handle to object in native code
*
* Authors:
* - Ludovic Henry <ludovic@xamarin.com>
G_BEGIN_DECLS
-
/*
Handle stack.
/* define MONO_HANDLE_TRACK_OWNER to store the file and line number of each call to MONO_HANDLE_NEW
* in the handle stack. (This doubles the amount of memory used for handles, so it's only useful for debugging).
*/
-/* #define MONO_HANDLE_TRACK_OWNER */
+/*#define MONO_HANDLE_TRACK_OWNER*/
+
+/* define MONO_HANDLE_TRACK_SP to record the C stack pointer at the time of each HANDLE_FUNCTION_ENTER and
+ * to ensure that when a new handle is allocated the previous newest handle is not lower in the stack.
+ * This is useful to catch missing HANDLE_FUNCTION_ENTER / HANDLE_FUNCTION_RETURN pairs which could cause
+ * handle leaks.
+ */
+/*#define MONO_HANDLE_TRACK_SP*/
typedef struct {
gpointer o; /* MonoObject ptr or interior ptr */
#ifdef MONO_HANDLE_TRACK_OWNER
const char *owner;
+ gpointer backtrace_ips[7]; /* result of backtrace () at time of allocation */
+#endif
+#ifdef MONO_HANDLE_TRACK_SP
+ gpointer alloc_sp; /* sp from HandleStack:stackmark_sp at time of allocation */
#endif
} HandleChunkElem;
-/* number of guint32's needed to store the interior pointers bitmap */
-#define INTERIOR_HANDLE_BITMAP_WORDS ((OBJECTS_PER_HANDLES_CHUNK + 31) / 32)
-
struct _HandleChunk {
int size; //number of handles
- /* bits in the range 0..size-1 of interior_bitmap are valid; rest are ignored. */
- guint32 interior_bitmap [INTERIOR_HANDLE_BITMAP_WORDS];
HandleChunk *prev, *next;
HandleChunkElem elems [OBJECTS_PER_HANDLES_CHUNK];
};
typedef struct {
HandleChunk *top; //alloc from here
HandleChunk *bottom; //scan from here
+#ifdef MONO_HANDLE_TRACK_SP
+ gpointer stackmark_sp; // C stack pointer top when from most recent mono_stack_mark_init
+#endif
+ /* Chunk for storing interior pointers. Not extended right now */
+ HandleChunk *interior;
} HandleStack;
+// Keep this in sync with RuntimeStructs.cs
typedef struct {
- int size;
+ int size, interior_size;
HandleChunk *chunk;
+#ifdef MONO_HANDLE_TRACK_SP
+ gpointer prev_sp; // C stack pointer from prior mono_stack_mark_init
+#endif
} HandleStackMark;
typedef void *MonoRawHandle;
#ifndef MONO_HANDLE_TRACK_OWNER
MonoRawHandle mono_handle_new (MonoObject *object);
MonoRawHandle mono_handle_new_full (gpointer rawptr, gboolean interior);
+MonoRawHandle mono_handle_new_interior (gpointer rawptr);
#else
MonoRawHandle mono_handle_new (MonoObject *object, const char* owner);
MonoRawHandle mono_handle_new_full (gpointer rawptr, gboolean interior, const char *owner);
+MonoRawHandle mono_handle_new_interior (gpointer rawptr, const char *owner);
#endif
-
void mono_handle_stack_scan (HandleStack *stack, GcScanFunc func, gpointer gc_data, gboolean precise);
gboolean mono_handle_stack_is_empty (HandleStack *stack);
HandleStack* mono_handle_stack_alloc (void);
void mono_handle_stack_free (HandleStack *handlestack);
MonoRawHandle mono_stack_mark_pop_value (MonoThreadInfo *info, HandleStackMark *stackmark, MonoRawHandle value);
void mono_stack_mark_record_size (MonoThreadInfo *info, HandleStackMark *stackmark, const char *func_name);
+void mono_handle_stack_free_domain (HandleStack *stack, MonoDomain *domain);
+
+#ifdef MONO_HANDLE_TRACK_SP
+void mono_handle_chunk_leak_check (HandleStack *handles);
+#endif
static inline void
mono_stack_mark_init (MonoThreadInfo *info, HandleStackMark *stackmark)
{
+#ifdef MONO_HANDLE_TRACK_SP
+ gpointer sptop = (gpointer)(intptr_t)&stackmark;
+#endif
HandleStack *handles = (HandleStack *)info->handle_stack;
stackmark->size = handles->top->size;
stackmark->chunk = handles->top;
+ stackmark->interior_size = handles->interior->size;
+#ifdef MONO_HANDLE_TRACK_SP
+ stackmark->prev_sp = handles->stackmark_sp;
+ handles->stackmark_sp = sptop;
+#endif
}
static inline void
old_top->size = stackmark->size;
mono_memory_write_barrier ();
handles->top = old_top;
+ handles->interior->size = stackmark->interior_size;
+#ifdef MONO_HANDLE_TRACK_SP
+ mono_memory_write_barrier (); /* write to top before prev_sp */
+ handles->stackmark_sp = stackmark->prev_sp;
+#endif
}
/*
mono_handle_array_getref (MONO_HANDLE_CAST(MonoObject, (DEST)), (HANDLE), (IDX)); \
} while (0)
-/* Handles into the interior of objects.
- *
- * Typically when working with value types, we pass them by reference. In the case where the value type
- * is a field in a managed class, the reference will be a pointer into the middle of a managed object.
- * We need to identify such pointers in order for SGen to scan them correctly.
- */
-
-#ifndef MONO_HANDLE_TRACK_OWNER
-#define MONO_HANDLE_NEW_GET_VALPTR(HANDLE,TYPE,FIELD) (TYPE_VALUE_HANDLE_NAME(TYPE))(mono_handle_new_full (&(HANDLE)->__raw->FIELD), TRUE))
-#else
-#define MONO_HANDLE_NEW_GET_VALPTR(HANDLE,TYPE,FIELD) (TYPE_VALUE_HANDLE_NAME(TYPE))(mono_handle_new_full (&(HANDLE)->__raw->FIELD), TRUE, HANDLE_OWNER_STRINGIFY(__FILE__, __LINE__))
-#endif
-
-
#define MONO_HANDLE_ASSIGN(DESTH, SRCH) \
mono_handle_assign (MONO_HANDLE_CAST (MonoObject, (DESTH)), MONO_HANDLE_CAST(MonoObject, (SRCH)))
#define MONO_HANDLE_DOMAIN(HANDLE) (mono_object_domain (MONO_HANDLE_RAW (MONO_HANDLE_CAST (MonoObject, HANDLE))))
+/* Given an object and a MonoClassField, return the value (must be non-object)
+ * of the field. It's the caller's responsibility to check that the object is
+ * of the correct class. */
+#define MONO_HANDLE_GET_FIELD_VAL(HANDLE,TYPE,FIELD) *(TYPE *)(mono_handle_unsafe_field_addr (MONO_HANDLE_CAST (MonoObject, (HANDLE)), (FIELD)))
+
+#define MONO_HANDLE_NEW_GET_FIELD(HANDLE,TYPE,FIELD) MONO_HANDLE_NEW (TYPE, *(TYPE**)(mono_handle_unsafe_field_addr (MONO_HANDLE_CAST (MonoObject, (HANDLE)), (FIELD))))
+
+#define MONO_HANDLE_SET_FIELD_VAL(HANDLE,TYPE,FIELD,VAL) do { \
+ MonoObjectHandle __obj = (HANDLE); \
+ MonoClassField *__field = (FIELD); \
+ TYPE __value = (VAL); \
+ *(TYPE*)(mono_handle_unsafe_field_addr (__obj, __field)) = __value; \
+ } while (0)
+
+#define MONO_HANDLE_SET_FIELD_REF(HANDLE,FIELD,VALH) do { \
+ MonoObjectHandle __obj = MONO_HANDLE_CAST (MonoObject, (HANDLE)); \
+ MonoClassField *__field = (FIELD); \
+ MonoObjectHandle __value = MONO_HANDLE_CAST (MonoObject, (VALH)); \
+ mono_gc_wbarrier_generic_store (mono_handle_unsafe_field_addr (__obj, __field), MONO_HANDLE_RAW (__value)); \
+ } while (0)
/* Baked typed handles we all want */
TYPED_HANDLE_DECL (MonoString);
TYPED_HANDLE_DECL (MonoArray);
TYPED_HANDLE_DECL (MonoObject);
TYPED_HANDLE_DECL (MonoException);
+TYPED_HANDLE_DECL (MonoAppContext);
+
+/* Unfortunately MonoThreadHandle is already a typedef used for something unrelated. So
+ * the coop handle for MonoThread* is MonoThreadObjectHandle.
+ */
+typedef MonoThread MonoThreadObject;
+TYPED_HANDLE_DECL (MonoThreadObject);
#define NULL_HANDLE_STRING MONO_HANDLE_CAST(MonoString, NULL_HANDLE)
mono_gc_wbarrier_generic_store (&dest->__raw, src ? MONO_HANDLE_RAW(src) : NULL);
}
+/* It is unsafe to call this function directly - it does not pin the handle! Use MONO_HANDLE_GET_FIELD_VAL(). */
+static inline gchar*
+mono_handle_unsafe_field_addr (MonoObjectHandle h, MonoClassField *field)
+{
+ return ((gchar *)MONO_HANDLE_RAW (h)) + field->offset;
+}
+
//FIXME this should go somewhere else
MonoStringHandle mono_string_new_handle (MonoDomain *domain, const char *data, MonoError *error);
MonoArrayHandle mono_array_new_handle (MonoDomain *domain, MonoClass *eclass, uintptr_t n, MonoError *error);
#define MONO_ARRAY_HANDLE_PIN(handle,type,index,gchandle_out) mono_array_handle_pin_with_size (MONO_HANDLE_CAST(MonoArray,(handle)), sizeof (type), (index), (gchandle_out))
+gunichar2 *
+mono_string_handle_pin_chars (MonoStringHandle s, uint32_t *gchandle_out);
+
+gpointer
+mono_object_handle_pin_unbox (MonoObjectHandle boxed_valuetype_obj, uint32_t *gchandle_out);
+
void
mono_error_set_exception_handle (MonoError *error, MonoExceptionHandle exc);
+MonoAppContextHandle
+mono_context_get_handle (void);
+
+void
+mono_context_set_handle (MonoAppContextHandle new_context);
+
G_END_DECLS
#endif /* __MONO_HANDLE_H__ */
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