31c509b171
- printf that looks like debug/status info or disabled by macro/comments mostly turned to corresponding nyx_debug() - printf followed by exit/abort/assert turned to nyx_error(), or nyx_abort() if the error is unlikely to need backtrace/gdb - non-fatal error/warning messages turned to nyx_warn() - few hardcoded printf remain, e.g. hexdump and debug helpers
140 lines
5.0 KiB
C
140 lines
5.0 KiB
C
#include "qemu/osdep.h"
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#include "qemu/main-loop.h"
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#include "sysemu/sysemu.h"
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#include "exec/ram_addr.h"
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#include "migration/migration.h"
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#include "qemu/rcu_queue.h"
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#include "nyx/memory_access.h"
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#include "nyx/fast_vm_reload.h"
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#include "nyx/snapshot/memory/backend/nyx_debug.h"
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/* init operation */
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void nyx_snapshot_debug_pre_init(void)
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{
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/* TODO */
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}
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/* init operation */
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void nyx_snapshot_debug_init(fast_reload_t *self)
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{
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/* TODO */
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}
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/* enable operation */
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void nyx_snapshot_debug_enable(fast_reload_t *self)
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{
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/* TODO */
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}
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/* restore operation */
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uint32_t nyx_snapshot_debug_restore(shadow_memory_t *shadow_memory_state,
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snapshot_page_blocklist_t *blocklist,
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bool verbose)
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{
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uint32_t num_dirty_pages = 0;
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void *current_region = NULL;
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int counter = 0;
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for (uint8_t i = 0; i < shadow_memory_state->ram_regions_num; i++) {
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if (shadow_memory_state->incremental_enabled) {
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current_region =
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shadow_memory_state->ram_regions[i].incremental_region_ptr;
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} else {
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current_region = shadow_memory_state->ram_regions[i].snapshot_region_ptr;
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}
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for (uint64_t addr = 0; addr < shadow_memory_state->ram_regions[i].size;
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addr += 0x1000)
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{
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void *host_addr =
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shadow_memory_state->ram_regions[i].host_region_ptr + addr;
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void *snapshot_addr = current_region + addr;
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uint64_t physical_addr = addr + shadow_memory_state->ram_regions[i].base;
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/* check first if the page is dirty (this is super slow, but quite useful for debugging) */
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if (memcmp(host_addr, snapshot_addr, TARGET_PAGE_SIZE)) {
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/* check if page is not on the block list */
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if (snapshot_page_blocklist_check_phys_addr(blocklist,
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physical_addr) == false)
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{
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// nyx_debug("(2) DIRTY: 0x%lx (NUM: %d - OFFSET: 0x%lx)\n", physical_addr, i, addr);
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if (verbose) {
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printf("%s -> (phys: 0x%lx) %p <-- %p [%d]\n", __func__,
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physical_addr, host_addr, snapshot_addr,
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shadow_memory_state->incremental_enabled);
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counter++;
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}
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memcpy(host_addr, snapshot_addr, TARGET_PAGE_SIZE);
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num_dirty_pages++;
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}
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}
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}
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}
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if (verbose) {
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printf("TOTAL: %d\n", counter);
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}
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return num_dirty_pages;
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}
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void nyx_snapshot_debug_save_root_pages(shadow_memory_t *shadow_memory_state,
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snapshot_page_blocklist_t *blocklist,
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bool verbose)
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{
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void *current_region = NULL;
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for (uint8_t i = 0; i < shadow_memory_state->ram_regions_num; i++) {
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if (shadow_memory_state->incremental_enabled) {
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current_region =
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shadow_memory_state->ram_regions[i].incremental_region_ptr;
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} else {
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current_region = shadow_memory_state->ram_regions[i].snapshot_region_ptr;
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}
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for (uint64_t addr = 0; addr < shadow_memory_state->ram_regions[i].size;
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addr += 0x1000)
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{
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void *host_addr =
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shadow_memory_state->ram_regions[i].host_region_ptr + addr;
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void *snapshot_addr = current_region + addr;
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uint64_t physical_addr = addr + shadow_memory_state->ram_regions[i].base;
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void *incremental_addr =
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shadow_memory_state->ram_regions[i].incremental_region_ptr + addr;
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/* check first if the page is dirty (this is super slow, but quite useful for debugging) */
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if (memcmp(host_addr, snapshot_addr, TARGET_PAGE_SIZE)) {
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/* check if page is not on the block list */
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if (snapshot_page_blocklist_check_phys_addr(blocklist,
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physical_addr) == false)
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{
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// nyx_debug("(2) DIRTY: 0x%lx (NUM: %d - OFFSET: 0x%lx)\n", physical_addr, i, addr);
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if (verbose &&
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!shadow_memory_is_root_page_tracked(shadow_memory_state,
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addr, i))
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{
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printf("%s -> %p <-- %p [%d]\n", __func__, host_addr,
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snapshot_addr,
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shadow_memory_state->incremental_enabled);
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}
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shadow_memory_track_dirty_root_pages(shadow_memory_state, addr, i);
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memcpy(incremental_addr, host_addr, TARGET_PAGE_SIZE);
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}
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}
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}
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}
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}
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/* set operation */
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void nyx_snapshot_debug_set(fast_reload_t *self)
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{
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/* TODO */
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}
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