#include "mc_private.h"
#include "mc_mmu.h"
+#include "mc_page_store.h"
mc_mem_region_t mc_get_snapshot_region(void* addr, mc_snapshot_t snapshot)
{
return NULL;
}
-void* mc_translate_address_region(uintptr_t addr, mc_mem_region_t region)
-{
- xbt_assert(mc_region_contain(region, (void*) addr), "Trying to read out of the region boundary.");
-
- if (!region) {
- return (void *) addr;
- }
-
- // Flat snapshot:
- else if (region->data) {
- uintptr_t offset = addr - (uintptr_t) region->start_addr;
- return (void *) ((uintptr_t) region->data + offset);
- }
-
- // Per-page snapshot:
- else if (region->page_numbers) {
- size_t pageno = mc_page_number(region->start_addr, (void*) addr);
- size_t snapshot_pageno = region->page_numbers[pageno];
- const void* snapshot_page = mc_page_store_get_page(mc_model_checker->pages, snapshot_pageno);
- return (char*) snapshot_page + mc_page_offset((void*) addr);
- }
-
- else {
- xbt_die("No data for this memory region");
- }
-}
-
-void* mc_translate_address(uintptr_t addr, mc_snapshot_t snapshot)
-{
-
- // If not in a process state/clone:
- if (!snapshot) {
- return (uintptr_t *) addr;
- }
-
- mc_mem_region_t region = mc_get_snapshot_region((void*) addr, snapshot);
- return mc_translate_address_region(addr, region);
-}
-
/** @brief Read memory from a snapshot region broken across fragmented pages
*
* @param addr Process (non-snapshot) address of the data
* @param size Size of the data to read in bytes
* @return Pointer where the data is located (target buffer of original location)
*/
-static void* mc_snapshot_read_fragmented(void* addr, mc_mem_region_t region, void* target, size_t size)
+void* mc_snapshot_read_fragmented(void* addr, mc_mem_region_t region, void* target, size_t size)
{
void* end = (char*) addr + size - 1;
size_t page_end = mc_page_number(NULL, end);
return target;
}
-/** @brief Read memory from a snapshot region
- *
- * @param addr Process (non-snapshot) address of the data
- * @param region Snapshot memory region where the data is located
- * @param target Buffer to store the value
- * @param size Size of the data to read in bytes
- * @return Pointer where the data is located (target buffer of original location)
- */
-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;
-
- xbt_assert(addr >= region->start_addr && (char*) addr+size < (char*)region->start_addr+region->size,
- "Trying to read out of the region boundary.");
-
- // Linear memory region:
- if (region->data) {
- return (void*) ((uintptr_t) region->data + offset);
- }
-
- // Fragmented memory region:
- else if (region->page_numbers) {
- void* end = (char*) addr + size - 1;
- if( mc_same_page(addr, end) ) {
- // The memory is contained in a single page:
- return mc_translate_address_region((uintptr_t) addr, region);
- } else {
- // The memory spans several pages:
- return mc_snapshot_read_fragmented(addr, region, target, size);
- }
- }
-
- else {
- xbt_die("No data available for this region");
- }
-}
-
/** @brief Read memory from a snapshot
*
* @param addr Process (non-snapshot) address of the data