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authoraph <aph@138bc75d-0d04-0410-961f-82ee72b054a4>2016-09-30 16:24:48 +0000
committeraph <aph@138bc75d-0d04-0410-961f-82ee72b054a4>2016-09-30 16:24:48 +0000
commit1ab7ff47807da0d9415c8929232b8c11b4ae4f4b (patch)
tree3f22b3241c513ad168c8353805614ae1249410f4 /libjava/include/java-interp.h
parent657f2849bed5a2ffe6eb04310cd4b2187c29067c (diff)
downloadgcc-1ab7ff47807da0d9415c8929232b8c11b4ae4f4b.tar.gz
2016-09-30 Andrew Haley <aph@redhat.com>
* Makefile.def: Remove libjava. * Makefile.tpl: Likewise. * Makefile.in: Regenerate. * configure.ac: Likewise. * configure: Likewise. * gcc/java: Remove. * libjava: Likewise. git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@240662 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'libjava/include/java-interp.h')
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diff --git a/libjava/include/java-interp.h b/libjava/include/java-interp.h
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index c088e9f010d..00000000000
--- a/libjava/include/java-interp.h
+++ /dev/null
@@ -1,588 +0,0 @@
-// java-interp.h - Header file for the bytecode interpreter. -*- c++ -*-
-
-/* Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007 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 __JAVA_INTERP_H__
-#define __JAVA_INTERP_H__
-
-#include <jvm.h>
-#include <java-cpool.h>
-#include <gnu/gcj/runtime/NameFinder.h>
-
-enum _Jv_FrameType
-{
- frame_native,
- frame_interpreter,
- frame_proxy
-};
-
-#ifdef INTERPRETER
-
-#pragma interface
-
-#include <java/lang/Class.h>
-#include <java/lang/ClassLoader.h>
-#include <java/lang/reflect/Modifier.h>
-#include <java/lang/Thread.h>
-#include <gnu/gcj/RawData.h>
-
-// Define this to get the direct-threaded interpreter. If undefined,
-// we revert to a basic bytecode interpreter. The former is faster
-// but uses more memory.
-#define DIRECT_THREADED
-
-#include <ffi.h>
-
-struct _Jv_ResolvedMethod;
-
-void _Jv_InitInterpreter ();
-void _Jv_DefineClass (jclass, jbyteArray, jint, jint,
- java::security::ProtectionDomain *,
- _Jv_Utf8Const **);
-
-void _Jv_InitField (jobject, jclass, int);
-void * _Jv_AllocMethodInvocation (jsize size);
-int _Jv_count_arguments (_Jv_Utf8Const *signature,
- jboolean staticp = true);
-void _Jv_VerifyMethod (_Jv_InterpMethod *method);
-void _Jv_CompileMethod (_Jv_InterpMethod* method);
-int _Jv_init_cif (_Jv_Utf8Const* signature,
- int arg_count,
- jboolean staticp,
- ffi_cif *cif,
- ffi_type **arg_types,
- ffi_type **rtype_p);
-
-/* the interpreter is written in C++, primarily because it makes it easy for
- * the entire thing to be "friend" with class Class. */
-
-class _Jv_InterpClass;
-class _Jv_InterpMethod;
-
-// Before a method is "compiled" we store values as the bytecode PC,
-// an int. Afterwards we store them as pointers into the prepared
-// code itself.
-union _Jv_InterpPC
-{
- int i;
- void *p;
-};
-
-class _Jv_InterpException
-{
- _Jv_InterpPC start_pc;
- _Jv_InterpPC end_pc;
- _Jv_InterpPC handler_pc;
- _Jv_InterpPC handler_type;
-
- friend class _Jv_ClassReader;
- friend class _Jv_InterpMethod;
- friend class _Jv_BytecodeVerifier;
-};
-
-// Base class for method representations. Subclasses are interpreted
-// and JNI methods.
-class _Jv_MethodBase
-{
-protected:
- // The class which defined this method.
- jclass defining_class;
-
- // The method description.
- _Jv_Method *self;
-
- // Size of raw arguments.
- _Jv_ushort args_raw_size;
-
- friend class _Jv_InterpreterEngine;
-
-public:
- _Jv_Method *get_method ()
- {
- return self;
- }
-};
-
-// The type of the PC depends on whether we're doing direct threading
-// or a more ordinary bytecode interpreter.
-#ifdef DIRECT_THREADED
-// Slot in the "compiled" form of the bytecode.
-union insn_slot
-{
- // Address of code.
- void *insn;
- // An integer value used by an instruction.
- jint int_val;
- // A pointer value used by an instruction.
- void *datum;
-};
-
-typedef insn_slot *pc_t;
-#else
-typedef unsigned char *pc_t;
-#endif
-
-
-// This structure holds the bytecode pc and corresponding source code
-// line number. An array (plus length field) of this structure is put
-// in each _Jv_InterpMethod and used to resolve the (internal) program
-// counter of the interpreted method to an actual java source file
-// line.
-struct _Jv_LineTableEntry
-{
- union
- {
- pc_t pc;
- int bytecode_pc;
- };
- int line;
-};
-
-// This structure holds local variable information.
-// Like _Jv_LineTableEntry above, it is remapped when the method is
-// compiled for direct threading.
-struct _Jv_LocalVarTableEntry
-{
- // First PC value at which variable is live
- union
- {
- pc_t pc;
- int bytecode_pc;
- };
-
- // length of visibility of variable
- int length;
-
- // variable name
- char *name;
-
- // type description
- char *descriptor;
-
- // stack slot number (long and double occupy slot and slot + 1)
- int slot;
-};
-
-class _Jv_InterpMethod : public _Jv_MethodBase
-{
- // Breakpoint instruction
- static pc_t breakpoint_insn;
-#ifdef DIRECT_THREADED
- static insn_slot bp_insn_slot;
-
-public:
- // Mutex to prevent a data race between threads when rewriting
- // instructions. See interpret-run.cc for an explanation of its use.
- static _Jv_Mutex_t rewrite_insn_mutex;
-
- // The count of threads executing this method.
- long thread_count;
-
-private:
-
-#else
- static unsigned char bp_insn_opcode;
-#endif
-
- _Jv_ushort max_stack;
- _Jv_ushort max_locals;
- int code_length;
-
- _Jv_ushort exc_count;
- bool is_15;
-
- // Length of the line_table - when this is zero then line_table is NULL.
- int line_table_len;
- _Jv_LineTableEntry *line_table;
-
- // The local variable table length and the table itself
- int local_var_table_len;
- _Jv_LocalVarTableEntry *local_var_table;
-
- pc_t prepared;
- int number_insn_slots;
-
- unsigned char* bytecode ()
- {
- return
- ((unsigned char*)this)
- + ROUND((sizeof (_Jv_InterpMethod)
- + exc_count*sizeof (_Jv_InterpException)), 4);
- }
-
- _Jv_InterpException * exceptions ()
- {
- return (_Jv_InterpException*) (this+1);
- }
-
- static size_t size (int exc_count, int code_length)
- {
- return
- ROUND ((sizeof (_Jv_InterpMethod)
- + (exc_count * sizeof (_Jv_InterpException))), 4)
- + code_length;
- }
-
- // return the method's invocation pointer (a stub).
- void *ncode (jclass);
- void compile (const void * const *);
-
-#if FFI_NATIVE_RAW_API
-# define INTERP_FFI_RAW_TYPE ffi_raw
-#else
-# define INTERP_FFI_RAW_TYPE ffi_java_raw
-#endif
-
- static void run_normal (ffi_cif*, void*, INTERP_FFI_RAW_TYPE*, void*);
- static void run_synch_object (ffi_cif*, void*, INTERP_FFI_RAW_TYPE*, void*);
- static void run_class (ffi_cif*, void*, INTERP_FFI_RAW_TYPE*, void*);
- static void run_synch_class (ffi_cif*, void*, INTERP_FFI_RAW_TYPE*, void*);
-
- static void run_normal_debug (ffi_cif*, void*, INTERP_FFI_RAW_TYPE*, void*);
- static void run_synch_object_debug (ffi_cif*, void*, INTERP_FFI_RAW_TYPE*,
- void*);
- static void run_class_debug (ffi_cif*, void*, INTERP_FFI_RAW_TYPE*, void*);
- static void run_synch_class_debug (ffi_cif*, void*, INTERP_FFI_RAW_TYPE*,
- void*);
-
- static void run (void *, INTERP_FFI_RAW_TYPE *, _Jv_InterpMethod *);
- static void run_debug (void *, INTERP_FFI_RAW_TYPE *, _Jv_InterpMethod *);
-
-
-
- // Returns source file line number for given PC value, or -1 if line
- // number info is unavailable.
- int get_source_line(pc_t mpc);
-
- public:
-
- // Convenience function for indexing bytecode PC/insn slots in
- // line tables for JDWP
- jlong insn_index (pc_t pc);
-
- // Helper function used to check if there is a handler for an exception
- // present at this code index
- jboolean check_handler (pc_t *pc, _Jv_InterpMethod *meth,
- java::lang::Throwable *ex);
-
- /* Get the line table for this method.
- * start is the lowest index in the method
- * end is the highest index in the method
- * line_numbers is an array to hold the list of source line numbers
- * code_indices is an array to hold the corresponding list of code indices
- */
- void get_line_table (jlong& start, jlong& end, jintArray& line_numbers,
- jlongArray& code_indices);
-
- int get_max_locals ()
- {
- return static_cast<int> (max_locals);
- }
-
- /* Get info for a local variable of this method.
- * If there is no loca_var_table for this method it will return -1.
- * table_slot indicates which slot in the local_var_table to get, if there is
- * no variable at this location it will return 0.
- * Otherwise, it will return the number of table slots after the selected
- * slot, indexed from 0.
- *
- * Example: there are 5 slots in the table, you request slot 0 so it will
- * return 4.
- */
- int get_local_var_table (char **name, char **sig, char **generic_sig,
- jlong *startloc, jint *length, jint *slot,
- int table_slot);
-
- /* Installs a break instruction at the given code index. Returns
- the pc_t of the breakpoint or NULL if index is invalid. */
- pc_t install_break (jlong index);
-
- // Gets the instruction at the given index
- pc_t get_insn (jlong index);
-
- /* Writes the given instruction at the given code index. Returns
- the insn or NULL if index is invalid. */
- pc_t set_insn (jlong index, pc_t insn);
-
- // Is the given location in this method a breakpoint?
- bool breakpoint_at (jlong index);
-
-#ifdef DIRECT_THREADED
- friend void _Jv_CompileMethod (_Jv_InterpMethod*);
-#endif
-
- friend class _Jv_ClassReader;
- friend class _Jv_BytecodeVerifier;
- friend class _Jv_StackTrace;
- friend class _Jv_InterpreterEngine;
-
-#ifdef JV_MARKOBJ_DECL
- friend JV_MARKOBJ_DECL;
-#endif
-};
-
-class _Jv_InterpClass
-{
- _Jv_MethodBase **interpreted_methods;
- _Jv_ushort *field_initializers;
- jstring source_file_name;
- _Jv_ClosureList **closures;
-
- friend class _Jv_ClassReader;
- friend class _Jv_InterpMethod;
- friend class _Jv_StackTrace;
- friend class _Jv_InterpreterEngine;
-
- friend void _Jv_InitField (jobject, jclass, int);
-#ifdef JV_MARKOBJ_DECL
- friend JV_MARKOBJ_DECL;
-#endif
-
- friend _Jv_MethodBase ** _Jv_GetFirstMethod (_Jv_InterpClass *klass);
- friend jstring _Jv_GetInterpClassSourceFile (jclass);
-};
-
-extern inline _Jv_MethodBase **
-_Jv_GetFirstMethod (_Jv_InterpClass *klass)
-{
- return klass->interpreted_methods;
-}
-
-struct _Jv_ResolvedMethod
-{
- jint stack_item_count;
- jclass klass;
- _Jv_Method* method;
-
- // a resolved method holds the cif in-line, so that _Jv_MarkObj just needs
- // to mark the resolved method to hold on to the cif. Some memory could be
- // saved by keeping a cache of cif's, since many will be the same.
- ffi_cif cif;
- ffi_type * arg_types[0];
-};
-
-class _Jv_JNIMethod : public _Jv_MethodBase
-{
- // The underlying function. If NULL we have to look for the
- // function.
- void *function;
-
- // This is the CIF used by the JNI function.
- ffi_cif jni_cif;
-
- // These are the argument types used by the JNI function.
- ffi_type **jni_arg_types;
-
- // This function is used when making a JNI call from the interpreter.
- static void call (ffi_cif *, void *, INTERP_FFI_RAW_TYPE *, void *);
-
- void *ncode (jclass);
-
- friend class _Jv_ClassReader;
- friend class _Jv_InterpreterEngine;
-
-#ifdef JV_MARKOBJ_DECL
- friend JV_MARKOBJ_DECL;
-#endif
-
-public:
- // FIXME: this is ugly.
- void set_function (void *f)
- {
- function = f;
- }
-};
-
-// The composite call stack as represented by a linked list of frames
-class _Jv_Frame
-{
-public:
- java::lang::Thread *thread;
-
- union
- {
- _Jv_MethodBase *self;
- void *meth;
- _Jv_Method *proxyMethod;
- };
-
- //The full list of frames, JNI and interpreted
- _Jv_Frame *next;
- _Jv_FrameType frame_type;
-
- _Jv_Frame (_Jv_MethodBase *s, java::lang::Thread *thr, _Jv_FrameType type)
- {
- self = s;
- frame_type = type;
- next = (_Jv_Frame *) thr->frame;
- thr->frame = (gnu::gcj::RawData *) this;
- thread = thr;
- }
-
- ~_Jv_Frame ()
- {
- thread->frame = (gnu::gcj::RawData *) next;
- }
-
- int depth ()
- {
- int depth = 0;
- struct _Jv_Frame *f;
- for (f = this; f != NULL; f = f->next)
- ++depth;
-
- return depth;
- }
-};
-
-// An interpreted frame in the call stack
-class _Jv_InterpFrame : public _Jv_Frame
-{
-public:
-
- // Keep the purely interpreted list around so as not to break backtraces
- _Jv_InterpFrame *next_interp;
-
- union
- {
- pc_t pc;
- jclass proxyClass;
- };
-
- // Pointer to the actual pc value.
- pc_t *pc_ptr;
-
- //Debug info for local variables.
- _Jv_word *locals;
- char *locals_type;
-
- // Object pointer for this frame ("this")
- jobject obj_ptr;
-
- _Jv_InterpFrame (void *meth, java::lang::Thread *thr, jclass proxyCls = NULL,
- pc_t *pc = NULL,
- _Jv_FrameType frame_type = frame_interpreter)
- : _Jv_Frame (reinterpret_cast<_Jv_MethodBase *> (meth), thr,
- frame_type)
- {
- next_interp = (_Jv_InterpFrame *) thr->interp_frame;
- proxyClass = proxyCls;
- thr->interp_frame = (gnu::gcj::RawData *) this;
- obj_ptr = NULL;
- pc_ptr = pc;
- }
-
- ~_Jv_InterpFrame ()
- {
- thread->interp_frame = (gnu::gcj::RawData *) next_interp;
- }
-
- jobject get_this_ptr ()
- {
- return obj_ptr;
- }
-
- pc_t get_pc ()
- {
- pc_t pc;
-
- // If the PC_PTR is NULL, we are not debugging.
- if (pc_ptr == NULL)
- pc = 0;
- else
- pc = *pc_ptr - 1;
-
- return pc;
- }
-};
-
-// A native frame in the call stack really just a placeholder
-class _Jv_NativeFrame : public _Jv_Frame
-{
-public:
-
- _Jv_NativeFrame (_Jv_JNIMethod *s, java::lang::Thread *thr)
- : _Jv_Frame (s, thr, frame_native)
- {
- }
-};
-
-#ifdef DIRECT_THREADED
-// This class increments and decrements the thread_count field in an
-// interpreted method. On entry to the interpreter a
-// ThreadCountAdjuster is created when increments the thread_count in
-// the current method and uses the next_interp field in the frame to
-// find the previous method and decrement its thread_count.
-class ThreadCountAdjuster
-{
-
- // A class used to handle the rewrite_insn_mutex while we're
- // adjusting the thread_count in a method. Unlocking the mutex in a
- // destructor ensures that it's unlocked even if (for example) a
- // segfault occurs in the critical section.
- class MutexLock
- {
- private:
- _Jv_Mutex_t *mutex;
- public:
- MutexLock (_Jv_Mutex_t *m)
- {
- mutex = m;
- _Jv_MutexLock (mutex);
- }
- ~MutexLock ()
- {
- _Jv_MutexUnlock (mutex);
- }
- };
-
- _Jv_InterpMethod *method;
- _Jv_InterpMethod *next_method;
-
-public:
-
- ThreadCountAdjuster (_Jv_InterpMethod *m, _Jv_InterpFrame *fr)
- {
- MutexLock lock (&::_Jv_InterpMethod::rewrite_insn_mutex);
-
- method = m;
- next_method = NULL;
-
- _Jv_InterpFrame *next_interp = fr->next_interp;
-
- // Record the fact that we're executing this method and that
- // we're no longer executing the method that called us.
- method->thread_count++;
-
- if (next_interp && next_interp->frame_type == frame_interpreter)
- {
- next_method
- = reinterpret_cast<_Jv_InterpMethod *> (next_interp->meth);
- next_method->thread_count--;
- }
- }
-
- ~ThreadCountAdjuster ()
- {
- MutexLock lock (&::_Jv_InterpMethod::rewrite_insn_mutex);
-
- // We're going to return to the method that called us, so bump its
- // thread_count and decrement our own.
-
- method->thread_count--;
-
- if (next_method)
- next_method->thread_count++;
- }
-};
-#endif // DIRECT_THREADED
-
-#endif /* INTERPRETER */
-
-#endif /* __JAVA_INTERP_H__ */