// java-stack.h - Definitions for unwinding & inspecting the call stack. /* Copyright (C) 2005, 2006 Free Software Foundation This file is part of libgcj. This software is copyrighted work licensed under the terms of the Libgcj License. Please consult the file "LIBGCJ_LICENSE" for details. */ #ifndef __JV_STACKTRACE_H__ #define __JV_STACKTRACE_H__ #include #include #include #include #include #include #include #include #include #include #include using namespace gnu::gcj::runtime; using namespace java::lang; enum _Jv_FrameType { frame_native, frame_interpreter }; #ifdef INTERPRETER struct _Jv_InterpFrameInfo { _Jv_InterpMethod *meth; pc_t pc; }; #endif union _Jv_FrameInfo { }; struct _Jv_StackFrame { _Jv_FrameType type; /* Native or interpreted. */ union { #ifdef INTERPRETER _Jv_InterpFrameInfo interp; #endif struct { void *ip; void *start_ip; }; }; // _Jv_FrameInfo info; /* Frame-type specific data. */ jclass klass; _Jv_Method *meth; }; typedef struct _Jv_UnwindState; typedef _Unwind_Reason_Code (*_Jv_TraceFn) (_Jv_UnwindState *); struct _Jv_UnwindState { jint length; // length of FRAMES jint pos; // current position in FRAMES _Jv_StackFrame *frames; // array of stack frame data to be filled. #ifdef INTERPRETER _Jv_InterpFrame *interp_frame; // current frame in the interpreter stack. #endif _Jv_TraceFn trace_function; // function to call back after each frame // is enumerated. May be NULL. void *trace_data; // additional state data for trace_function. _Jv_UnwindState (jint ln) { length = ln; pos = 0; frames = NULL; Thread *thread = Thread::currentThread(); // Check for NULL currentThread(), in case an exception is created // very early during the runtime startup. #ifdef INTERPRETER if (thread) interp_frame = (_Jv_InterpFrame *) thread->interp_frame; #endif trace_function = NULL; trace_data = NULL; } }; class _Jv_StackTrace { private: int length; _Jv_StackFrame frames[]; static java::util::IdentityHashMap *ncodeMap; static void UpdateNCodeMap (); static jclass ClassForFrame (_Jv_StackFrame *frame); static void FillInFrameInfo (_Jv_StackFrame *frame); static void getLineNumberForFrame(_Jv_StackFrame *frame, NameFinder *finder, jstring *sourceFileName, jint *lineNum, jstring *methodName); static _Unwind_Reason_Code UnwindTraceFn (struct _Unwind_Context *context, void *state_ptr); static _Unwind_Reason_Code calling_class_trace_fn (_Jv_UnwindState *state); static _Unwind_Reason_Code non_system_trace_fn (_Jv_UnwindState *state); static _Unwind_Reason_Code accesscontrol_trace_fn (_Jv_UnwindState *state); public: static _Jv_StackTrace *GetStackTrace (void); static JArray< ::java::lang::StackTraceElement *>* GetStackTraceElements (_Jv_StackTrace *trace, java::lang::Throwable *throwable); static jclass GetCallingClass (jclass); static void GetCallerInfo (jclass checkClass, jclass *, _Jv_Method **); static JArray *GetClassContext (jclass checkClass); static ClassLoader *GetFirstNonSystemClassLoader (void); static jobjectArray GetAccessControlStack (); friend jclass _Jv_GetMethodDeclaringClass (jmethodID); }; // Information about a given address. struct _Jv_AddrInfo { // File name of the defining module. const char *file_name; // Base address of the loaded module. void *base; // Name of the nearest symbol. const char *sym_name; // Address of the nearest symbol. void *sym_addr; ~_Jv_AddrInfo (void) { // On systems with a real dladdr(), the file and symbol names given by // _Jv_platform_dladdr() are not dynamically allocated. On Windows, // they are. #ifdef WIN32 if (file_name) free ((void *)file_name); if (sym_name) free ((void *)sym_name); #endif /* WIN32 */ } }; #endif /* __JV_STACKTRACE_H__ */