* Added vm_debug_copy_page_memory() which copies memory from a potentially not

mapped page.
* debug_{mem,strl}cpy():
  - Added "team" parameter for specifying the address space the address are
    to be interpreted in.
  - When the standard memcpy() (with fault handler) fails, fall back to
    vm_debug_copy_page_memory().
* Added debug_is_debugged_team(): Predicate returning true, if the supplied
  team_id refers to the same team debug_get_debugged_thread() belongs to.
* Added DebuggedThreadSetter class for scope-based debug_set_debugged_thread().
  Made use of it in several debugger functions.
* print_demangled_call() (x86): Fixed unsafe memory access.

Allows KDL stack traces to work correctly again, even if the page daemon has
already unmapped the concerned pages.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@36230 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/private/kernel/debug.h

@@ -132,8 +132,10 @@ extern bool		debug_is_kernel_memory_accessible(addr_t address, size_t size,
 					uint32 protection);
 extern int		debug_call_with_fault_handler(jmp_buf jumpBuffer,
 					void (*function)(void*), void* parameter);
-extern status_t	debug_memcpy(void* to, const void* from, size_t size);
-extern ssize_t	debug_strlcpy(char* to, const char* from, size_t size);
+extern status_t	debug_memcpy(team_id teamID, void* to, const void* from,
+					size_t size);
+extern ssize_t	debug_strlcpy(team_id teamID, char* to, const char* from,
+					size_t size);
 
 extern char		kgetc(void);
 extern void		kputs(const char *string);
@@ -172,8 +174,9 @@ extern status_t	debug_get_next_demangled_argument(uint32* _cookie,
 
 extern struct thread* debug_set_debugged_thread(struct thread* thread);
 extern struct thread* debug_get_debugged_thread();
-extern struct arch_debug_registers* debug_get_debug_registers(int32 cpu);
+extern bool debug_is_debugged_team(team_id teamID);
 
+extern struct arch_debug_registers* debug_get_debug_registers(int32 cpu);
 
 extern status_t	_user_kernel_debugger(const char *message);
 extern void		_user_debug_output(const char *userString);
@@ -182,4 +185,27 @@ extern void		_user_debug_output(const char *userString);
 }
 #endif
 
+
+#ifdef __cplusplus
+
+struct DebuggedThreadSetter {
+	DebuggedThreadSetter(struct thread* thread)
+		:
+		fPreviousThread(debug_set_debugged_thread(thread))
+	{
+	}
+
+	~DebuggedThreadSetter()
+	{
+		debug_set_debugged_thread(fPreviousThread);
+	}
+
+private:
+	struct thread*	fPreviousThread;
+};
+
+
+#endif	// __cplusplus
+
+
 #endif	/* _KERNEL_DEBUG_H */

headers/private/kernel/vm/vm.h

@@ -140,6 +140,9 @@ status_t vm_memcpy_to_physical(addr_t to, const void* from, size_t length,
 			bool user);
 void vm_memcpy_physical_page(addr_t to, addr_t from);
 
+status_t vm_debug_copy_page_memory(team_id teamID, void* unsafeMemory,
+			void* buffer, size_t size, bool copyToUnsafe);
+
 // user syscalls
 area_id _user_create_area(const char *name, void **address, uint32 addressSpec,
 			size_t size, uint32 lock, uint32 protection);