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