tcg/wasm32: trace compiled-store TLB corruption under ramrace

system/memory.c

@@ -32,6 +32,7 @@
 #include "sysemu/tcg.h"
 #include "qemu/accel.h"
 #include "hw/boards.h"
+#include "hw/core/cpu.h"
 #include "migration/vmstate.h"
 #include "exec/address-spaces.h"
 
@@ -1404,6 +1405,10 @@ static const MemoryRegionOps ram_device_mem_ops = {
     },
 };
 
+#if defined(EMSCRIPTEN) && !defined(CONFIG_TCG_INTERPRETER)
+extern int wasm_ramrace_trace;
+#endif
+
 bool memory_region_access_valid(MemoryRegion *mr,
                                 hwaddr addr,
                                 unsigned size,
@@ -1416,6 +1421,16 @@ bool memory_region_access_valid(MemoryRegion *mr,
                       ", size %u, region '%s', reason: rejected\n",
                       is_write ? "write" : "read",
                       addr, size, memory_region_name(mr));
+#if defined(EMSCRIPTEN) && !defined(CONFIG_TCG_INTERPRETER)
+        if (wasm_ramrace_trace) {
+            printf("FAULTTRACE rejected %s addr=0x%llx size=%u mr=%p name=%s ops=%p opaque=%p ram=%d rom=%d readonly=%d current_cpu=%p\n",
+                   is_write ? "write" : "read", (unsigned long long)addr,
+                   size, mr, memory_region_name(mr) ?: "(null)", mr->ops,
+                   mr->opaque, memory_region_is_ram(mr), memory_region_is_rom(mr),
+                   mr->readonly, current_cpu);
+            fflush(stdout);
+        }
+#endif
         return false;
     }
 

system/physmem.c

@@ -2979,6 +2979,15 @@ static MemTxResult flatview_read(FlatView *fv, hwaddr addr,
 
     l = len;
     mr = flatview_translate(fv, addr, &mr_addr, &l, false, attrs);
+#if defined(EMSCRIPTEN) && !defined(CONFIG_TCG_INTERPRETER)
+    if (wasm_ramrace_trace && current_cpu && mr->ops == &unassigned_mem_ops) {
+        printf("FAULTTRACE flatview_read addr=0x%llx len=0x%llx mr_addr=0x%llx translated_len=0x%llx fv=%p root=%p root_name=%s nr=%u\n",
+               (unsigned long long)addr, (unsigned long long)len,
+               (unsigned long long)mr_addr, (unsigned long long)l,
+               fv, fv->root, memory_region_name(fv->root) ?: "(null)", fv->nr);
+        fflush(stdout);
+    }
+#endif
     if (!flatview_access_allowed(mr, attrs, addr, len)) {
         return MEMTX_ACCESS_ERROR;
     }