> compile NEMU

ysyx_22040000 李心杨
Linux calcite 6.6.19 #1-NixOS SMP PREEMPT_DYNAMIC Fri Mar  1 12:35:11 UTC 2024 x86_64 GNU/Linux
 17:50:21  up   7:26,  2 users,  load average: 0.39, 0.50, 0.54

nemu/Kconfig

@@ -159,7 +159,20 @@ config ITRACE_BUFFER
 config MTRACE
   depends on TRACE && TARGET_NATIVE_ELF && ENGINE_INTERPRETER
   bool "Enable memory tracer"
-  default n
+
+
+config MTRACE_RANGE
+  depends on MTRACE
+  string "Memory trace active range"
+  default "0-fffffff"
+  help
+    Memory tracer will only print memory access in these ranges.
+    Use comma to seperate between ranges.
+
+config MTRACE_RANGE_MAX
+  depends on MTRACE
+  int "Max range count in MTRACE_RANGE"
+  default 10
 
 config DIFFTEST
   depends on TARGET_NATIVE_ELF

nemu/src/memory/paddr.c

@@ -13,6 +13,7 @@
 * See the Mulan PSL v2 for more details.
 ***************************************************************************************/
 
+#include "common.h"
 #include <memory/host.h>
 #include <memory/paddr.h>
 #include <device/mmio.h>
@@ -23,6 +24,11 @@ static uint8_t *pmem = NULL;
 #else // CONFIG_PMEM_GARRAY
 static uint8_t pmem[CONFIG_MSIZE] PG_ALIGN = {};
 #endif
+#ifdef CONFIG_MTRACE
+static word_t mtrace_start[CONFIG_MTRACE_RANGE_MAX] = {0};
+static word_t mtrace_end[CONFIG_MTRACE_RANGE_MAX] = {0};
+static int range_count = 0;
+#endif
 
 uint8_t* guest_to_host(paddr_t paddr) { return pmem + paddr - CONFIG_MBASE; }
 paddr_t host_to_guest(uint8_t *haddr) { return haddr - pmem + CONFIG_MBASE; }
@@ -41,10 +47,34 @@ static void out_of_bound(paddr_t addr) {
       addr, PMEM_LEFT, PMEM_RIGHT, cpu.pc);
 }
 
+#ifdef CONFIG_MTRACE
+static void mtrace_print(char type, word_t addr, int len, word_t data) {
+  for (int i = 0; i < range_count; i++)
+    if (addr <= mtrace_end[i] && addr >= mtrace_start[i] ) {
+      printf("[TRACE] Mem %c " FMT_WORD "%d D " FMT_WORD "\n", type, addr, len, data);
+      break;
+    }
+}
+#endif
+
 void init_mem() {
 #if   defined(CONFIG_PMEM_MALLOC)
   pmem = malloc(CONFIG_MSIZE);
   assert(pmem);
+#endif
+#ifdef CONFIG_MTRACE
+  char range[sizeof(CONFIG_MTRACE_RANGE)] = CONFIG_MTRACE_RANGE;
+  char *saveptr, *ptr;
+  ptr = strtok_r(range, ",", &saveptr);
+  for (range_count = 0; range_count < CONFIG_MTRACE_RANGE_MAX; range_count++) {
+    word_t start, end;
+    Assert(sscanf(ptr, "%x-%x", &start, &end) == 2, "Config option MTRACE_RANGE has wrong format");
+    mtrace_start[range_count] = start;
+    mtrace_end[range_count] = end;
+
+    ptr = strtok_r(NULL, ",", &saveptr);
+    if (!ptr) break;
+  }
 #endif
   IFDEF(CONFIG_MEM_RANDOM, memset(pmem, rand(), CONFIG_MSIZE));
   Log("physical memory area [" FMT_PADDR ", " FMT_PADDR "]", PMEM_LEFT, PMEM_RIGHT);
@@ -57,13 +87,13 @@ word_t paddr_read(paddr_t addr, int len) {
   out_of_bound(addr);
 
 mtrace:
-  IFDEF(CONFIG_MTRACE, printf("R " FMT_WORD "%d D " FMT_WORD "\n", addr, len, result));
+  IFDEF(CONFIG_MTRACE, mtrace_print('R', addr, len, result));
   
   return result;
 }
 
 void paddr_write(paddr_t addr, int len, word_t data) {
-  IFDEF(CONFIG_MTRACE, printf("W " FMT_WORD "%d D " FMT_WORD "\n", addr, len, data));
+  IFDEF(CONFIG_MTRACE, mtrace_print('W', addr, len, data));
   if (likely(in_pmem(addr))) { pmem_write(addr, len, data); return; }
   IFDEF(CONFIG_DEVICE, mmio_write(addr, len, data); return);
   out_of_bound(addr);