#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))
xbt_dynar_t ignored_data;
} s_mc_snapshot_t, *mc_snapshot_t;
-mc_mem_region_t mc_get_snapshot_region(void* addr, mc_snapshot_t snapshot);
+/** @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
+
+/** @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{
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)
*
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);
+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, int process_index);
+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, 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);
* \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.");
if(snapshot==NULL)
xbt_die("snapshot is NULL");
void** addr = &((xbt_mheap_t)std_heap)->breakval;
- return mc_snapshot_read_pointer(addr, snapshot);
+ 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:
}
}
+static inline __attribute__ ((always_inline))
+void* mc_snapshot_read_pointer_region(void* addr, mc_mem_region_t region)
+{
+ void* res;
+ return *(void**) mc_snapshot_read_region(addr, region, &res, sizeof(void*));
+}
SG_END_DECL()
