-/* Copyright (c) 2007-2013. The SimGrid Team.
+/* Copyright (c) 2007-2014. The SimGrid Team.
* All rights reserved. */
/* This program is free software; you can redistribute it and/or modify it
#define NB_REGIONS 3 /* binary data (data + BSS) (type = 2), libsimgrid data (data + BSS) (type = 1), std_heap (type = 0)*/
typedef struct s_mc_mem_region{
+ // Real address:
void *start_addr;
+ // Copy of the datra:
void *data;
+ // Size of the data region:
size_t size;
} s_mc_mem_region_t, *mc_mem_region_t;
void MC_restore_snapshot(mc_snapshot_t);
void MC_free_snapshot(mc_snapshot_t);
+/** \brief Translate a pointer from process address space to snapshot address space
+ *
+ * The address space contains snapshot of the main/application memory:
+ * this function finds the address in a given snaphot for a given
+ * real/application address.
+ *
+ * For read only memory regions and other regions which are not int the
+ * snapshot, the address is not changed.
+ *
+ * \param addr Application address
+ * \param snapshot The snapshot of interest (if NULL no translation is done)
+ * \return Translated address in the snapshot address space
+ * */
+void* mc_translate_address(uintptr_t addr, mc_snapshot_t snapshot);
+
+/** \brief Translate a pointer from the snapshot address space to the application address space
+ *
+ * This is the inverse of mc_translate_address.
+ *
+ * \param addr Address in the snapshot address space
+ * \param snapsot Snapshot of interest (if NULL no translation is done)
+ * \return Translated address in the application address space
+ */
+uintptr_t mc_untranslate_address(void* addr, mc_snapshot_t snapshot);
+
extern xbt_dynar_t mc_checkpoint_ignore;
/********************************* MC Global **********************************/
char *start_exec, *end_exec; // Executable segment
char *start_rw, *end_rw; // Read-write segment
char *start_ro, *end_ro; // read-only segment
- xbt_dynar_t subprograms; // xbt_dynar_t<dw_frame_t>
+ xbt_dict_t subprograms; // xbt_dict_t<origin as hexadecimal string, dw_frame_t>
xbt_dynar_t global_variables; // xbt_dynar_t<dw_variable_t>
xbt_dict_t types; // xbt_dict_t<origin as hexadecimal string, dw_type_t>
- xbt_dict_t types_by_name; // xbt_dict_t<name, dw_type_t> (full defined type only)
+ xbt_dict_t full_types_by_name; // xbt_dict_t<name, dw_type_t> (full defined type only)
// Here we sort the minimal information for an efficient (and cache-efficient)
// lookup of a function given an instruction pointer.
extern mc_object_info_t mc_libsimgrid_info;
extern mc_object_info_t mc_binary_info;
+extern mc_object_info_t mc_object_infos[2];
+extern size_t mc_object_infos_size;
void MC_find_object_address(memory_map_t maps, mc_object_info_t result);
void MC_post_process_types(mc_object_info_t info);
-typedef enum {
- e_dw_loclist,
- e_dw_register,
- e_dw_bregister_op,
- e_dw_lit,
- e_dw_fbregister_op,
- e_dw_piece,
- e_dw_arithmetic,
- e_dw_plus_uconst,
- e_dw_compose,
- e_dw_deref,
- e_dw_uconstant,
- e_dw_sconstant,
- e_dw_unsupported
-} e_dw_location_type;
-
-typedef struct s_dw_location{
- e_dw_location_type type;
- union{
-
- xbt_dynar_t loclist;
-
- int reg;
-
- struct{
- unsigned int reg;
- int offset;
- }breg_op;
-
- unsigned int lit;
-
- int fbreg_op;
-
- int piece;
-
- unsigned short int deref_size;
-
- xbt_dynar_t compose;
-
- char *arithmetic;
-
- struct{
- int bytes;
- long unsigned int value;
- }uconstant;
-
- struct{
- int bytes;
- long signed int value;
- }sconstant;
-
- unsigned int plus_uconst;
-
- }location;
-}s_dw_location_t, *dw_location_t;
-
-typedef struct s_dw_location_entry{
- void* lowpc;
- void* highpc;
- dw_location_t location;
-}s_dw_location_entry_t, *dw_location_entry_t;
+// ***** Expressions
+
+/** \brief a DWARF expression with optional validity contraints */
+typedef struct s_mc_expression {
+ size_t size;
+ Dwarf_Op* ops;
+ // Optional validity:
+ void* lowpc, *highpc;
+} s_mc_expression_t, *mc_expression_t;
+
+/** A location list (list of location expressions) */
+typedef struct s_mc_location_list {
+ size_t size;
+ mc_expression_t locations;
+} s_mc_location_list_t, *mc_location_list_t;
+
+Dwarf_Off mc_dwarf_resolve_location(mc_expression_t expression, unw_cursor_t* c, void* frame_pointer_address, mc_snapshot_t snapshot);
+Dwarf_Off mc_dwarf_resolve_locations(mc_location_list_t locations, unw_cursor_t* c, void* frame_pointer_address, mc_snapshot_t snapshot);
+
+void mc_dwarf_expression_clear(mc_expression_t expression);
+void mc_dwarf_expression_init(mc_expression_t expression, size_t len, Dwarf_Op* ops);
+
+void mc_dwarf_location_list_clear(mc_location_list_t list);
+
+void mc_dwarf_location_list_init_from_expression(mc_location_list_t target, size_t len, Dwarf_Op* ops);
+void mc_dwarf_location_list_init(mc_location_list_t target, mc_object_info_t info, Dwarf_Die* die, Dwarf_Attribute* attr);
+
+// ***** Variables and functions
+
+struct s_dw_type{
+ e_dw_type_type type;
+ void *id; /* Offset in the section (in hexadecimal form) */
+ char *name; /* Name of the type */
+ int byte_size; /* Size in bytes */
+ int element_count; /* Number of elements for array type */
+ char *dw_type_id; /* DW_AT_type id */
+ xbt_dynar_t members; /* if DW_TAG_structure_type, DW_TAG_class_type, DW_TAG_union_type*/
+ int is_pointer_type;
+
+ // Location (for members) is either of:
+ struct s_mc_expression location;
+ int offset;
+
+ dw_type_t subtype; // DW_AT_type
+ dw_type_t full_type; // The same (but more complete) type
+};
+
+void* mc_member_resolve(const void* base, dw_type_t type, dw_type_t member, mc_snapshot_t snapshot);
+void* mc_member_snapshot_resolve(const void* base, dw_type_t type, dw_type_t member, mc_snapshot_t snapshot);
typedef struct s_dw_variable{
Dwarf_Off dwarf_offset; /* Global offset of the field. */
dw_type_t type;
// Use either of:
- dw_location_t location;
+ s_mc_location_list_t locations;
void* address;
size_t start_scope;
}s_dw_variable_t, *dw_variable_t;
struct s_dw_frame{
+ int tag;
char *name;
void *low_pc;
void *high_pc;
- dw_location_t frame_base;
+ s_mc_location_list_t frame_base;
xbt_dynar_t /* <dw_variable_t> */ variables; /* Cannot use dict, there may be several variables with the same name (in different lexical blocks)*/
- unsigned long int start; /* DWARF offset of the subprogram */
- unsigned long int end; /* Dwarf offset of the next sibling */
+ unsigned long int id; /* DWARF offset of the subprogram */
+ xbt_dynar_t /* <dw_frame_t> */ scopes;
+ Dwarf_Off abstract_origin_id;
};
struct s_mc_function_index_item {
dw_frame_t function;
};
+void mc_frame_free(dw_frame_t freme);
+
void dw_type_free(dw_type_t t);
void dw_variable_free(dw_variable_t v);
void dw_variable_free_voidp(void *t);
/********************************** DWARF **********************************/
-Dwarf_Off MC_dwarf_resolve_location(unw_cursor_t* c, dw_location_t location, void* frame_pointer_address);
-void* mc_find_frame_base(void* ip, dw_frame_t frame, unw_cursor_t* unw_cursor);
+#define MC_EXPRESSION_STACK_SIZE 64
+
+#define MC_EXPRESSION_OK 0
+#define MC_EXPRESSION_E_UNSUPPORTED_OPERATION 1
+#define MC_EXPRESSION_E_STACK_OVERFLOW 2
+#define MC_EXPRESSION_E_STACK_UNDERFLOW 3
+#define MC_EXPRESSION_E_MISSING_STACK_CONTEXT 4
+#define MC_EXPRESSION_E_MISSING_FRAME_BASE 5
+
+typedef struct s_mc_expression_state {
+ uintptr_t stack[MC_EXPRESSION_STACK_SIZE];
+ size_t stack_size;
+
+ unw_cursor_t* cursor;
+ void* frame_base;
+ mc_snapshot_t snapshot;
+} s_mc_expression_state_t, *mc_expression_state_t;
+
+int mc_dwarf_execute_expression(size_t n, const Dwarf_Op* ops, mc_expression_state_t state);
+
+void* mc_find_frame_base(dw_frame_t frame, unw_cursor_t* unw_cursor);
/********************************** Miscellaneous **********************************/
typedef struct s_local_variable{
- char *frame;
+ dw_frame_t subprogram;
unsigned long ip;
char *name;
dw_type_t type;
int completed;
unsigned long src_proc;
unsigned long dst_proc;
+ const char *src_host;
+ const char *dst_host;
char *rdv;
size_t data_size;
void *data;
typedef struct s_mc_address_set *mc_address_set_t;
mc_address_set_t mc_address_set_new();
-mc_address_set_t mc_address_set_free(mc_address_set_t* p);
+void mc_address_set_free(mc_address_set_t* p);
void mc_address_add(mc_address_set_t p, const void* value);
bool mc_address_test(mc_address_set_t p, const void* value);
