WalkVM crash in dd-java-agent v1.56.0 (#298)

zhengyu123 · jbachorik · commit 3f1ab0e93051 · 2025-12-05T16:12:37.000+01:00
(cherry picked from commit 5ec6f6a)
diff --git a/ddprof-lib/src/main/cpp/safeAccess.h b/ddprof-lib/src/main/cpp/safeAccess.h
@@ -45,11 +45,11 @@ class SafeAccess {
 
   static bool handle_safefetch(int sig, void* context);
 
-  static inline void *load(void **ptr) {
+  static inline void *load(void **ptr, void* default_value = nullptr) {
     return loadPtr(ptr, nullptr);
   }
 
-  static inline u32 load32(u32 *ptr, u32 default_value) {
+  static inline u32 load32(u32 *ptr, u32 default_value = 0) {
     int res = safefetch32_impl((int*)ptr, (int)default_value);
     return static_cast<u32>(res);
   }

Original file line number	Diff line number	Diff line change
`@@ -45,11 +45,11 @@ class SafeAccess {`
`45`	`45`
`46`	`46`	`static bool handle_safefetch(int sig, void* context);`
`47`	`47`
`48`		`- static inline void load(void *ptr) {`
	`48`	`+ static inline void load(void ptr, void default_value = nullptr) {`
`49`	`49`	`return loadPtr(ptr, nullptr);`
`50`	`50`	`}`
`51`	`51`
`52`		`- static inline u32 load32(u32 *ptr, u32 default_value) {`
	`52`	`+ static inline u32 load32(u32 *ptr, u32 default_value = 0) {`
`53`	`53`	`int res = safefetch32_impl((int*)ptr, (int)default_value);`
`54`	`54`	`return static_cast<u32>(res);`
`55`	`55`	`}`