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// java-stack.h - Definitions for unwinding & inspecting the call stack.
/* Copyright (C) 2005 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 <unwind.h>
#include <gcj/cni.h>
#include <gcj/javaprims.h>
#include <java-interp.h>
#include <java/lang/Class.h>
#include <java/lang/StackTraceElement.h>
#include <java/lang/Throwable.h>
#include <java/lang/Thread.h>
#include <gnu/gcj/runtime/NameFinder.h>
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 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);
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<jclass> *GetClassContext (jclass checkClass);
static ClassLoader *GetFirstNonSystemClassLoader (void);
};
#endif /* __JV_STACKTRACE_H__ */
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