-/* 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
#include "xbt/function_types.h"
#include "xbt/mmalloc.h"
#include "../simix/smx_private.h"
+#include "../xbt/mmalloc/mmprivate.h"
#include "xbt/automaton.h"
#include "xbt/hash.h"
#include "msg/msg.h"
#include "xbt/strbuff.h"
#include "xbt/parmap.h"
+typedef struct s_dw_frame s_dw_frame_t, *dw_frame_t;
+typedef struct s_mc_function_index_item s_mc_function_index_item_t, *mc_function_index_item_t;
+
/****************************** Snapshots ***********************************/
#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;
size_t heap_bytes_used;
mc_mem_region_t regions[NB_REGIONS];
int nb_processes;
+ mc_mem_region_t* privatization_regions;
+ int privatization_index;
size_t *stack_sizes;
xbt_dynar_t stacks;
xbt_dynar_t to_ignore;
uint64_t hash;
} s_mc_snapshot_t, *mc_snapshot_t;
+/** Information about a given stack frame
+ *
+ */
+typedef struct s_mc_stack_frame {
+ /** Instruction pointer */
+ unw_word_t ip;
+ /** Stack pointer */
+ unw_word_t sp;
+ unw_word_t frame_base;
+ dw_frame_t frame;
+ char* frame_name;
+ unw_cursor_t unw_cursor;
+} s_mc_stack_frame_t, *mc_stack_frame_t;
+
typedef struct s_mc_snapshot_stack{
xbt_dynar_t local_variables;
void *stack_pointer;
void *real_address;
+ xbt_dynar_t stack_frames; // mc_stack_frame_t
}s_mc_snapshot_stack_t, *mc_snapshot_stack_t;
typedef struct s_mc_global_t{
size_t size;
}s_mc_checkpoint_ignore_region_t, *mc_checkpoint_ignore_region_t;
+inline static void* mc_snapshot_get_heap_end(mc_snapshot_t snapshot) {
+ if(snapshot==NULL)
+ xbt_die("snapshot is NULL");
+ xbt_mheap_t heap = (xbt_mheap_t)snapshot->regions[0]->data;
+ return heap->breakval;
+}
+
mc_snapshot_t SIMIX_pre_mc_snapshot(smx_simcall_t simcall);
mc_snapshot_t MC_take_snapshot(int num_state);
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 **********************************/
void MC_show_deadlock(smx_simcall_t req);
void MC_show_stack_safety(xbt_fifo_t stack);
void MC_dump_stack_safety(xbt_fifo_t stack);
-void MC_init(void);
int SIMIX_pre_mc_random(smx_simcall_t simcall, int min, int max);
+extern xbt_fifo_t mc_stack;
+int get_search_interval(xbt_dynar_t list, void *ref, int *min, int *max);
+
/********************************* Requests ***********************************/
/******************************** States **************************************/
+extern mc_global_t initial_global_state;
+
/* Possible exploration status of a process in a state */
typedef enum {
MC_NOT_INTERLEAVE=0, /* Do not interleave (do not execute) */
/* you must wrap the code between MC_SET_RAW_MODE and MC_UNSET_RAW_MODE */
extern void *std_heap;
-extern void *raw_heap;
+extern void *mc_heap;
/* FIXME: Horrible hack! because the mmalloc library doesn't provide yet of */
/* size_t bytes_free; /\* Byte total of chunks in the free list. *\/ */
/* }; */
-#define MC_SET_RAW_MEM mmalloc_set_current_heap(raw_heap)
-#define MC_UNSET_RAW_MEM mmalloc_set_current_heap(std_heap)
+#define MC_SET_MC_HEAP mmalloc_set_current_heap(mc_heap)
+#define MC_SET_STD_HEAP mmalloc_set_current_heap(std_heap)
/******************************* MEMORY MAPPINGS ***************************/
//#define MC_DEBUG 1
#define MC_VERBOSE 1
-
-/********************************** DPOR for safety property **************************************/
+/********************************** Safety verification **************************************/
typedef enum {
e_mc_reduce_unset,
} e_mc_reduce_t;
extern e_mc_reduce_t mc_reduce_kind;
-extern mc_global_t initial_state_safety;
-extern xbt_fifo_t mc_stack_safety;
extern xbt_dict_t first_enabled_state;
-void MC_dpor_init(void);
-void MC_dpor(void);
+void MC_pre_modelcheck_safety(void);
+void MC_modelcheck_safety(void);
typedef struct s_mc_visited_state{
mc_snapshot_t system_state;
int other_num; // dot_output for
}s_mc_visited_state_t, *mc_visited_state_t;
+extern xbt_dynar_t visited_states;
+int is_visited_state(void);
+void visited_state_free(mc_visited_state_t state);
+void visited_state_free_voidp(void *s);
-/********************************** Double-DFS for liveness property **************************************/
+/********************************** Liveness verification **************************************/
-extern xbt_fifo_t mc_stack_liveness;
-extern mc_global_t initial_state_liveness;
extern xbt_automaton_t _mc_property_automaton;
-extern int compare;
typedef struct s_mc_pair{
int num;
mc_visited_pair_t MC_visited_pair_new(int pair_num, xbt_automaton_state_t automaton_state, xbt_dynar_t atomic_propositions);
void MC_visited_pair_delete(mc_visited_pair_t p);
-void MC_ddfs_init(void);
-void MC_ddfs(void);
+void MC_pre_modelcheck_liveness(void);
+void MC_modelcheck_liveness(void);
void MC_show_stack_liveness(xbt_fifo_t stack);
void MC_dump_stack_liveness(xbt_fifo_t stack);
+extern xbt_dynar_t visited_pairs;
+int is_visited_pair(mc_visited_pair_t pair, int pair_num, xbt_automaton_state_t automaton_state, xbt_dynar_t atomic_propositions);
+
/********************************** Variables with DWARF **********************************/
+#define MC_OBJECT_INFO_EXECUTABLE 1
+
struct s_mc_object_info {
+ size_t flags;
char* file_name;
char *start_exec, *end_exec; // Executable segment
char *start_rw, *end_rw; // Read-write segment
char *start_ro, *end_ro; // read-only segment
- xbt_dict_t local_variables; // xbt_dict_t<frame_name, 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.
+ // The entries are sorted by low_pc and a binary search can be used to look them up.
+ xbt_dynar_t functions_index;
};
mc_object_info_t MC_new_object_info(void);
-mc_object_info_t MC_find_object_info(memory_map_t maps, char* name);
+mc_object_info_t MC_find_object_info(memory_map_t maps, char* name, int executable);
void MC_free_object_info(mc_object_info_t* p);
void MC_dwarf_get_variables(mc_object_info_t info);
const char* MC_dwarf_attrname(int attr);
const char* MC_dwarf_tagname(int tag);
+dw_frame_t MC_find_function_by_ip(void* ip);
+mc_object_info_t MC_ip_find_object_info(void* ip);
+
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;
-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{
- long lowpc;
- long highpc;
- dw_location_t location;
-}s_dw_location_entry_t, *dw_location_entry_t;
+void MC_find_object_address(memory_map_t maps, mc_object_info_t result);
+void MC_post_process_types(mc_object_info_t info);
+void MC_post_process_object_info(mc_object_info_t info);
+
+// ***** 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;
+
+uintptr_t mc_dwarf_resolve_location(mc_expression_t expression, mc_object_info_t object_info, unw_cursor_t* c, void* frame_pointer_address, mc_snapshot_t snapshot);
+uintptr_t mc_dwarf_resolve_locations(mc_location_list_t locations, mc_object_info_t object_info, 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;
+ Dwarf_Off 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. */
int global;
char *name;
char *type_origin;
- union{
- dw_location_t location; // For global==0
- void *address; // For global!=0
- }address;
+ dw_type_t type;
+
+ // Use either of:
+ s_mc_location_list_t locations;
+ void* address;
+
+ size_t start_scope;
+ mc_object_info_t object_info;
+
}s_dw_variable_t, *dw_variable_t;
-typedef struct s_dw_frame{
+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 */
-}s_dw_frame_t, *dw_frame_t;
+ unsigned long int id; /* DWARF offset of the subprogram */
+ xbt_dynar_t /* <dw_frame_t> */ scopes;
+ Dwarf_Off abstract_origin_id;
+ mc_object_info_t object_info;
+};
+
+struct s_mc_function_index_item {
+ void* low_pc, *high_pc;
+ 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 MC_dwarf_register_non_global_variable(mc_object_info_t info, dw_frame_t frame, dw_variable_t variable);
void MC_dwarf_register_variable(mc_object_info_t info, dw_frame_t frame, dw_variable_t variable);
+/** Find the DWARF offset for this ELF object
+ *
+ * An offset is applied to address found in DWARF:
+ *
+ * <ul>
+ * <li>for an executable obejct, addresses are virtual address
+ * (there is no offset) i.e. \f$\text{virtual address} = \{dwarf address}\f$;</li>
+ * <li>for a shared object, the addreses are offset from the begining
+ * of the shared object (the base address of the mapped shared
+ * object must be used as offset
+ * i.e. \f$\text{virtual address} = \text{shared object base address}
+ * + \text{dwarf address}\f$.</li>
+ *
+ */
+void* MC_object_base_address(mc_object_info_t info);
+
/********************************** DWARF **********************************/
-Dwarf_Off MC_dwarf_resolve_location(unw_cursor_t* c, dw_location_t location, void* frame_pointer_address);
-void* mc_find_frame_base(unw_word_t 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
+#define MC_EXPRESSION_E_NO_BASE_ADDRESS 6
+
+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;
+ mc_object_info_t object_info;
+} 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, mc_object_info_t object_info, unw_cursor_t* unw_cursor);
/********************************** Miscellaneous **********************************/
typedef struct s_local_variable{
- char *frame;
+ dw_frame_t subprogram;
unsigned long ip;
char *name;
- char *type;
+ dw_type_t type;
void *address;
int region;
}s_local_variable_t, *local_variable_t;
int num;
smx_action_t comm;
e_smx_comm_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;
+ ssize_t data_size;
void *data;
- int matched_comm;
}s_mc_comm_pattern_t, *mc_comm_pattern_t;
extern xbt_dynar_t communications_pattern;
+extern xbt_dynar_t incomplete_communications_pattern;
void get_comm_pattern(xbt_dynar_t communications_pattern, smx_simcall_t request, int call);
+void complete_comm_pattern(xbt_dynar_t list, smx_action_t comm);
+void MC_pre_modelcheck_comm_determinism(void);
/* *********** Sets *********** */
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);
/* *********** Hash *********** */
-uint64_t mc_hash_processes_state(int num_state);
-
-#define MC_USE_SNAPSHOT_HASH 1
+/** \brief Hash the current state
+ * \param num_state number of states
+ * \param stacks stacks (mc_snapshot_stak_t) used fot the stack unwinding informations
+ * \result resulting hash
+ * */
+uint64_t mc_hash_processes_state(int num_state, xbt_dynar_t stacks);
#endif
