#include "xbt/parmap.h"
#include "mc_mmu.h"
#include "mc_page_store.h"
+#include "mc_interface.h"
SG_BEGIN_DECL()
/****************************** Snapshots ***********************************/
-#define NB_REGIONS 3 /* binary data (data + BSS) (type = 2), libsimgrid data (data + BSS) (type = 1), std_heap (type = 0)*/
+#define NB_REGIONS 3 /* binary data (data + BSS) (type = 2), libsimgrid data (data + BSS) (type = 1), std_heap (type = 0)*/
+/** @brief Copy/snapshot of a given memory region
+ *
+ * Two types of region snapshots exist:
+ * <ul>
+ * <li>flat/dense snapshots are a simple copy of the region;</li>
+ * <li>sparse/per-page snapshots are snaapshots which shared
+ * identical pages.</li>
+ * </ul>
+ */
typedef struct s_mc_mem_region{
- // Real address:
+ /** @brief Virtual address of the region in the simulated process */
void *start_addr;
- // Copy of the datra:
+
+ /** @brief Permanent virtual address of the region
+ *
+ * This is usually the same address as the simuilated process address.
+ * However, when using SMPI privatization of global variables,
+ * each SMPI process has its own set of global variables stored
+ * at a different virtual address. The scheduler maps those region
+ * on the region of the global variables.
+ *
+ * */
+ void *permanent_addr;
+
+ /** @brief Copy of the snapshot for flat snapshots regions (NULL otherwise) */
void *data;
- // Size of the data region:
+
+ /** @brief Size of the data region in bytes */
size_t size;
- // For per-page snapshots, this is an array to the number of
+
+ /** @brief Pages indices in the page store for per-page snapshots (NULL otherwise) */
size_t* page_numbers;
+
} s_mc_mem_region_t, *mc_mem_region_t;
static inline __attribute__ ((always_inline))
void* data;
} s_mc_snapshot_ignored_data_t, *mc_snapshot_ignored_data_t;
+typedef struct s_fd_infos{
+ char *filename;
+ int number;
+ off_t current_position;
+ int flags;
+}s_fd_infos_t, *fd_infos_t;
+
typedef struct s_mc_snapshot{
size_t heap_bytes_used;
mc_mem_region_t regions[NB_REGIONS];
xbt_dynar_t to_ignore;
uint64_t hash;
xbt_dynar_t ignored_data;
-} s_mc_snapshot_t, *mc_snapshot_t;
+ int total_fd;
+ fd_infos_t *current_fd;
+} s_mc_snapshot_t;
+
+
+/** @brief Process index used when no process is available
+ *
+ * The expected behaviour is that if a process index is needed it will fail.
+ * */
+#define MC_NO_PROCESS_INDEX -1
-mc_mem_region_t mc_get_snapshot_region(void* addr, mc_snapshot_t snapshot);
+/** @brief Process index when any process is suitable
+ *
+ * We could use a special negative value in the future.
+ */
+#define MC_ANY_PROCESS_INDEX 0
+
+mc_mem_region_t mc_get_snapshot_region(void* addr, mc_snapshot_t snapshot, int process_index);
static inline __attribute__ ((always_inline))
-mc_mem_region_t mc_get_region_hinted(void* addr, mc_snapshot_t snapshot, mc_mem_region_t region)
+mc_mem_region_t mc_get_region_hinted(void* addr, mc_snapshot_t snapshot, int process_index, mc_mem_region_t region)
{
if (mc_region_contain(region, addr))
return region;
else
- return mc_get_snapshot_region(addr, snapshot);
+ return mc_get_snapshot_region(addr, snapshot, process_index);
}
/** Information about a given stack frame
typedef struct s_mc_snapshot_stack{
xbt_dynar_t local_variables;
xbt_dynar_t stack_frames; // mc_stack_frame_t
+ int process_index;
}s_mc_snapshot_stack_t, *mc_snapshot_stack_t;
typedef struct s_mc_global_t{
static void* mc_snapshot_get_heap_end(mc_snapshot_t snapshot);
-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);
size_t* mc_take_page_snapshot_region(void* data, size_t page_count, uint64_t* pagemap, size_t* reference_pages);
void mc_free_page_snapshot_region(size_t* pagenos, size_t page_count);
-void mc_restore_page_snapshot_region(mc_mem_region_t region, size_t page_count, uint64_t* pagemap, mc_mem_region_t reference_region);
+void mc_restore_page_snapshot_region(void* start_addr, size_t page_count, size_t* pagenos, uint64_t* pagemap, size_t* reference_pagenos);
-mc_mem_region_t mc_region_new_sparse(int type, void *start_addr, size_t size, mc_mem_region_t ref_reg);
+mc_mem_region_t mc_region_new_sparse(int type, void *start_addr, void* data_addr, size_t size, mc_mem_region_t ref_reg);
+void MC_region_destroy(mc_mem_region_t reg);
void mc_region_restore_sparse(mc_mem_region_t reg, mc_mem_region_t ref_reg);
void mc_softdirty_reset();
void* mc_snapshot_read_fragmented(void* addr, mc_mem_region_t region, void* target, size_t size);
-void* mc_snapshot_read(void* addr, mc_snapshot_t snapshot, void* target, size_t size);
-int mc_snapshot_region_memcp(
+void* mc_snapshot_read(void* addr, mc_snapshot_t snapshot, int process_index, void* target, size_t size);
+int mc_snapshot_region_memcmp(
void* addr1, mc_mem_region_t region1,
void* addr2, mc_mem_region_t region2, size_t size);
-int mc_snapshot_memcp(
+int mc_snapshot_memcmp(
void* addr1, mc_snapshot_t snapshot1,
- void* addr2, mc_snapshot_t snapshot2, size_t size);
+ void* addr2, mc_snapshot_t snapshot2, int process_index, size_t size);
-static void* mc_snapshot_read_pointer(void* addr, mc_snapshot_t snapshot);
+static void* mc_snapshot_read_pointer(void* addr, mc_snapshot_t snapshot, int process_index);
/** @brief State of the model-checker (global variables for the model checker)
*
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);
-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);
unsigned int MC_request_testany_fail(smx_simcall_t req);
/*int MC_waitany_is_enabled_by_comm(smx_req_t req, unsigned int comm);*/
int MC_request_is_visible(smx_simcall_t req);
+
+/** Can this requests can be executed.
+ *
+ * Most requests are always enabled but WAIT and WAITANY
+ * are not always enabled: a WAIT where the communication does not
+ * have both a source and a destination yet is not enabled
+ * (unless timeout is enabled in the wait and enabeld in SimGridMC).
+ */
int MC_request_is_enabled(smx_simcall_t req);
int MC_request_is_enabled_by_idx(smx_simcall_t req, unsigned int idx);
+
+/** Is the process ready to execute its simcall?
+ *
+ * This is true if the request associated with the process is ready.
+ */
int MC_process_is_enabled(smx_process_t process);
+
char *MC_request_get_dot_output(smx_simcall_t req, int value);
typedef struct mc_state {
unsigned long max_pid; /* Maximum pid at state's creation time */
mc_procstate_t proc_status; /* State's exploration status by process */
- s_smx_action_t internal_comm; /* To be referenced by the internal_req */
+ s_smx_synchro_t internal_comm; /* To be referenced by the internal_req */
s_smx_simcall_t internal_req; /* Internal translation of request */
s_smx_simcall_t executed_req; /* The executed request of the state */
int req_num; /* The request number (in the case of a
/* Normally the system should operate in std, for switching to raw mode */
/* you must wrap the code between MC_SET_RAW_MODE and MC_UNSET_RAW_MODE */
-extern void *std_heap;
-extern void *mc_heap;
+extern xbt_mheap_t std_heap;
+extern xbt_mheap_t mc_heap;
/* FIXME: Horrible hack! because the mmalloc library doesn't provide yet of */
extern __thread double mc_snapshot_comparison_time;
int snapshot_compare(void *state1, void *state2);
-int SIMIX_pre_mc_compare_snapshots(smx_simcall_t simcall, mc_snapshot_t s1, mc_snapshot_t s2);
void print_comparison_times(void);
//#define MC_DEBUG 1
}s_mc_visited_state_t, *mc_visited_state_t;
extern xbt_dynar_t visited_states;
-int is_visited_state(void);
+mc_visited_state_t is_visited_state(void);
void visited_state_free(mc_visited_state_t state);
void visited_state_free_voidp(void *s);
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);
void MC_post_process_object_info(mc_object_info_t info);
// ***** Expressions
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);
+/** A location is either a location in memory of a register location
+ *
+ * Usage:
+ *
+ * * mc_dwarf_resolve_locations or mc_dwarf_resolve_location is used
+ * to find the location of a given location expression or location list;
+ *
+ * * mc_get_location_type MUST be used to find the location type;
+ *
+ * * for MC_LOCATION_TYPE_ADDRESS, memory_address is the resulting address
+ *
+ * * for MC_LOCATION_TYPE_REGISTER, unw_get_reg(l.cursor, l.register_id, value)
+ * and unw_get_reg(l.cursor, l.register_id, value) can be used to read/write
+ * the value.
+ * </ul>
+ */
+typedef struct s_mc_location {
+ void* memory_location;
+ unw_cursor_t* cursor;
+ int register_id;
+} s_mc_location_t, *mc_location_t;
+
+/** Type of a given location
+ *
+ * Use `mc_get_location_type(location)` to find the type.
+ * */
+typedef enum mc_location_type {
+ MC_LOCATION_TYPE_ADDRESS,
+ MC_LOCATION_TYPE_REGISTER
+} mc_location_type;
+
+/** Find the type of a location */
+static inline __attribute__ ((always_inline))
+enum mc_location_type mc_get_location_type(mc_location_t location) {
+ if (location->cursor) {
+ return MC_LOCATION_TYPE_REGISTER;
+ } else {
+ return MC_LOCATION_TYPE_ADDRESS;
+ }
+}
+
+void mc_dwarf_resolve_location(mc_location_t location, mc_expression_t expression, mc_object_info_t object_info, unw_cursor_t* c, void* frame_pointer_address, mc_snapshot_t snapshot, int process_index);
+void mc_dwarf_resolve_locations(mc_location_t location, mc_location_list_t locations, mc_object_info_t object_info, unw_cursor_t* c, void* frame_pointer_address, mc_snapshot_t snapshot, int process_index);
void mc_dwarf_expression_clear(mc_expression_t expression);
void mc_dwarf_expression_init(mc_expression_t expression, size_t len, Dwarf_Op* ops);
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_resolve(const void* base, dw_type_t type, dw_type_t member, mc_snapshot_t snapshot, int process_index);
typedef struct s_dw_variable{
Dwarf_Off dwarf_offset; /* Global offset of the field. */
void* frame_base;
mc_snapshot_t snapshot;
mc_object_info_t object_info;
+ int process_index;
} 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);
typedef struct s_mc_comm_pattern{
int num;
- smx_action_t comm;
+ smx_synchro_t comm;
e_smx_comm_type_t type;
unsigned long src_proc;
unsigned long dst_proc;
void *data;
}s_mc_comm_pattern_t, *mc_comm_pattern_t;
+extern xbt_dynar_t initial_communications_pattern;
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);
+// Can we use the SIMIX syscall for this?
+typedef enum mc_call_type {
+ MC_CALL_TYPE_NONE,
+ MC_CALL_TYPE_SEND,
+ MC_CALL_TYPE_RECV,
+ MC_CALL_TYPE_WAIT,
+ MC_CALL_TYPE_WAITANY,
+} mc_call_type;
+
+static inline mc_call_type mc_get_call_type(smx_simcall_t req) {
+ switch(req->call) {
+ case SIMCALL_COMM_ISEND:
+ return MC_CALL_TYPE_SEND;
+ case SIMCALL_COMM_IRECV:
+ return MC_CALL_TYPE_RECV;
+ case SIMCALL_COMM_WAIT:
+ return MC_CALL_TYPE_WAIT;
+ case SIMCALL_COMM_WAITANY:
+ return MC_CALL_TYPE_WAITANY;
+ default:
+ return MC_CALL_TYPE_NONE;
+ }
+}
+
+void get_comm_pattern(xbt_dynar_t communications_pattern, smx_simcall_t request, mc_call_type call_type);
+void mc_update_comm_pattern(mc_call_type call_type, smx_simcall_t request, int value, xbt_dynar_t current_pattern);
+void complete_comm_pattern(xbt_dynar_t list, smx_synchro_t comm);
void MC_pre_modelcheck_comm_determinism(void);
void MC_modelcheck_comm_determinism(void);
* \return Translated address in the snapshot address space
* */
static inline __attribute__((always_inline))
-void* mc_translate_address(uintptr_t addr, mc_snapshot_t snapshot)
+void* mc_translate_address(uintptr_t addr, mc_snapshot_t snapshot, int process_index)
{
// If not in a process state/clone:
return (uintptr_t *) addr;
}
- mc_mem_region_t region = mc_get_snapshot_region((void*) addr, snapshot);
+ mc_mem_region_t region = mc_get_snapshot_region((void*) addr, snapshot, process_index);
xbt_assert(mc_region_contain(region, (void*) addr), "Trying to read out of the region boundary.");
void* mc_snapshot_get_heap_end(mc_snapshot_t snapshot) {
if(snapshot==NULL)
xbt_die("snapshot is NULL");
- void** addr = &((xbt_mheap_t)std_heap)->breakval;
- return mc_snapshot_read_pointer(addr, snapshot);
+ void** addr = &(std_heap->breakval);
+ return mc_snapshot_read_pointer(addr, snapshot, MC_ANY_PROCESS_INDEX);
}
static inline __attribute__ ((always_inline))
-void* mc_snapshot_read_pointer(void* addr, mc_snapshot_t snapshot)
+void* mc_snapshot_read_pointer(void* addr, mc_snapshot_t snapshot, int process_index)
{
void* res;
- return *(void**) mc_snapshot_read(addr, snapshot, &res, sizeof(void*));
+ return *(void**) mc_snapshot_read(addr, snapshot, process_index, &res, sizeof(void*));
}
/** @brief Read memory from a snapshot region
static inline __attribute__((always_inline))
void* mc_snapshot_read_region(void* addr, mc_mem_region_t region, void* target, size_t size)
{
- uintptr_t offset = (uintptr_t) addr - (uintptr_t) region->start_addr;
+ if (region==NULL)
+ return addr;
+
+ uintptr_t offset = (char*) addr - (char*) region->start_addr;
- xbt_assert(addr >= region->start_addr && (char*) addr+size <= (char*)region->start_addr+region->size,
+ xbt_assert(mc_region_contain(region, addr),
"Trying to read out of the region boundary.");
// Linear memory region:
if (region->data) {
- return (void*) ((uintptr_t) region->data + offset);
+ return (char*) region->data + offset;
}
// Fragmented memory region:
else if (region->page_numbers) {
+ // Last byte of the region:
void* end = (char*) addr + size - 1;
if( mc_same_page(addr, end) ) {
// The memory is contained in a single page:
return *(void**) mc_snapshot_read_region(addr, region, &res, sizeof(void*));
}
+#define MC_LOG_REQUEST(log, req, value) \
+ if (XBT_LOG_ISENABLED(log, xbt_log_priority_debug)) { \
+ char* req_str = MC_request_to_string(req, value); \
+ XBT_DEBUG("Execute: %s", req_str); \
+ xbt_free(req_str); \
+ }
+
+/** @brief Dump the stacks of the application processes
+ *
+ * This functions is currently not used but it is quite convenient
+ * to call from the debugger.
+ *
+ * Does not work when an application thread is running.
+ */
+void MC_dump_stacks(FILE* file);
+
SG_END_DECL()
#endif
-