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Diffstat (limited to 'gcc-4.9/libjava/include/jvm.h')
| -rw-r--r-- | gcc-4.9/libjava/include/jvm.h | 804 |
1 files changed, 804 insertions, 0 deletions
diff --git a/gcc-4.9/libjava/include/jvm.h b/gcc-4.9/libjava/include/jvm.h new file mode 100644 index 000000000..ec74f295a --- /dev/null +++ b/gcc-4.9/libjava/include/jvm.h @@ -0,0 +1,804 @@ +// jvm.h - Header file for private implementation information. -*- c++ -*- + +/* Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 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_JVM_H__ +#define __JAVA_JVM_H__ + +// Define this before including jni.h. +// jni.h is included by jvmpi.h, which might be included. We define +// this unconditionally because it is convenient and it lets other +// files include jni.h without difficulty. +#define __GCJ_JNI_IMPL__ + +#include <gcj/javaprims.h> + +#include <java-assert.h> +#include <java-threads.h> +// Must include java-gc.h before Object.h for the implementation. +#include <java-gc.h> + +#include <java/lang/Object.h> + +// Include cni.h before field.h to enable all definitions. FIXME. +#include <gcj/cni.h> +#include <gcj/field.h> + +#include <java/lang/Thread.h> + +#include <sysdep/locks.h> + +/* Macro for possible unused arguments. */ +#define MAYBE_UNUSED __attribute__((__unused__)) + +/* Structure of the virtual table. */ +struct _Jv_VTable +{ +#ifdef __ia64__ + typedef struct { void *pc, *gp; } vtable_elt; +#else + typedef void *vtable_elt; +#endif + jclass clas; + void *gc_descr; + + // This must be last, as derived classes "extend" this by + // adding new data members. + vtable_elt method[1]; + +#ifdef __ia64__ + void *get_method(int i) { return &method[i]; } + void set_method(int i, void *fptr) { method[i] = *(vtable_elt *)fptr; } + void *get_finalizer() + { + // We know that get_finalizer is only used for checking whether + // this object needs to have a finalizer registered. So it is + // safe to simply return just the PC component of the vtable + // slot. + return ((vtable_elt *)(get_method(0)))->pc; + } +#else + void *get_method(int i) { return method[i]; } + void set_method(int i, void *fptr) { method[i] = fptr; } + void *get_finalizer() { return get_method(0); } +#endif + + static size_t vtable_elt_size() { return sizeof(vtable_elt); } + + // Given a method index, return byte offset from the vtable pointer. + static jint idx_to_offset (int index) + { + return (2 * sizeof (void *)) + (index * vtable_elt_size ()); + } + + static _Jv_VTable *new_vtable (int count); +}; + +union _Jv_word +{ + jobject o; + jint i; // Also stores smaller integral types. + jfloat f; + jint ia[1]; // Half of _Jv_word2. + void* p; + +#if SIZEOF_VOID_P == 8 + // We can safely put a long or a double in here without increasing + // the size of _Jv_Word; we take advantage of this in the interpreter. + jlong l; + jdouble d; +#endif + + jclass clazz; + jstring string; + struct _Jv_Field *field; + struct _Jv_Utf8Const *utf8; + struct _Jv_ResolvedMethod *rmethod; +}; + +union _Jv_word2 +{ + jint ia[2]; + jlong l; + jdouble d; +}; + +union _Jv_value +{ + jbyte byte_value; + jshort short_value; + jchar char_value; + jint int_value; + jlong long_value; + jfloat float_value; + jdouble double_value; + jobject object_value; +}; + +/* Extract a character from a Java-style Utf8 string. + * PTR points to the current character. + * LIMIT points to the end of the Utf8 string. + * PTR is incremented to point after the character thta gets returns. + * On an error, -1 is returned. */ +#define UTF8_GET(PTR, LIMIT) \ + ((PTR) >= (LIMIT) ? -1 \ + : *(PTR) < 128 ? *(PTR)++ \ + : (*(PTR)&0xE0) == 0xC0 && ((PTR)+=2)<=(LIMIT) && ((PTR)[-1]&0xC0) == 0x80 \ + ? (((PTR)[-2] & 0x1F) << 6) + ((PTR)[-1] & 0x3F) \ + : (*(PTR) & 0xF0) == 0xE0 && ((PTR) += 3) <= (LIMIT) \ + && ((PTR)[-2] & 0xC0) == 0x80 && ((PTR)[-1] & 0xC0) == 0x80 \ + ? (((PTR)[-3]&0x0F) << 12) + (((PTR)[-2]&0x3F) << 6) + ((PTR)[-1]&0x3F) \ + : ((PTR)++, -1)) + +extern int _Jv_strLengthUtf8(const char* str, int len); + +typedef struct _Jv_Utf8Const Utf8Const; +_Jv_Utf8Const *_Jv_makeUtf8Const (const char *s, int len); +_Jv_Utf8Const *_Jv_makeUtf8Const (jstring string); +static inline _Jv_Utf8Const *_Jv_makeUtf8Const (const char *s) +{ + return _Jv_makeUtf8Const (s, strlen (s)); +} +extern jboolean _Jv_equalUtf8Consts (const _Jv_Utf8Const *, const _Jv_Utf8Const *); +extern jboolean _Jv_equal (_Jv_Utf8Const *, jstring, jint); +extern jboolean _Jv_equaln (_Jv_Utf8Const *, jstring, jint); + +/* Helper class which converts a jstring to a temporary char*. + Uses the supplied buffer, if non-null. Otherwise, allocates + the buffer on the heap. Use the JV_TEMP_UTF_STRING macro, + which follows, to automatically allocate a stack buffer if + the string is small enough. */ +class _Jv_TempUTFString +{ +public: + _Jv_TempUTFString(jstring jstr, char* buf=0); + ~_Jv_TempUTFString(); + +// Accessors + operator const char*() const + { + return buf_; + } + const char* buf() const + { + return buf_; + } + char* buf() + { + return buf_; + } + +private: + char* buf_; + bool heapAllocated_; +}; + +inline _Jv_TempUTFString::_Jv_TempUTFString (jstring jstr, char* buf) + : buf_(0), heapAllocated_(false) +{ + if (!jstr) return; + jsize len = JvGetStringUTFLength (jstr); + if (buf) + buf_ = buf; + else + { + buf_ = (char*) _Jv_Malloc (len+1); + heapAllocated_ = true; + } + + JvGetStringUTFRegion (jstr, 0, jstr->length(), buf_); + buf_[len] = '\0'; +} + +inline _Jv_TempUTFString::~_Jv_TempUTFString () +{ + if (heapAllocated_) + _Jv_Free (buf_); +} + +/* Macro which uses _Jv_TempUTFString. Allocates a stack-based + buffer if the string and its null terminator are <= 256 + characters in length. Otherwise, a heap-based buffer is + used. The parameters to this macro are the variable name + which is an instance of _Jv_TempUTFString (above) and a + jstring. + + Sample Usage: + + jstring jstr = getAJString(); + JV_TEMP_UTF_STRING(utfstr, jstr); + printf("The string is: %s\n", utfstr.buf()); + + */ +#define JV_TEMP_UTF_STRING(utfstr, jstr) \ + jstring utfstr##thejstr = (jstr); \ + jsize utfstr##_len = utfstr##thejstr ? JvGetStringUTFLength (utfstr##thejstr) + 1 : 0; \ + char utfstr##_buf[utfstr##_len <= 256 ? utfstr##_len : 0]; \ + _Jv_TempUTFString utfstr(utfstr##thejstr, sizeof(utfstr##_buf)==0 ? 0 : utfstr##_buf) + +namespace gcj +{ + /* Some constants used during lookup of special class methods. */ + extern _Jv_Utf8Const *void_signature; /* "()V" */ + extern _Jv_Utf8Const *clinit_name; /* "<clinit>" */ + extern _Jv_Utf8Const *init_name; /* "<init>" */ + extern _Jv_Utf8Const *finit_name; /* "finit$", */ + + /* Set to true by _Jv_CreateJavaVM. */ + extern bool runtimeInitialized; + + /* Print out class names as they are initialized. */ + extern bool verbose_class_flag; + + /* When true, enable the bytecode verifier and BC-ABI verification. */ + extern bool verifyClasses; + + /* Thread stack size specified by the -Xss runtime argument. */ + extern size_t stack_size; + + /* The start time */ + extern jlong startTime; + + /* The VM arguments */ + extern JArray<jstring>* vmArgs; + + // Currently loaded classes + extern jint loadedClasses; + + // Unloaded classes + extern jlong unloadedClasses; +} + +// This class handles all aspects of class preparation and linking. +class _Jv_Linker +{ +private: + typedef unsigned int uaddr __attribute__ ((mode (pointer))); + + static _Jv_Field *find_field_helper(jclass, _Jv_Utf8Const *, _Jv_Utf8Const *, + jclass, jclass *); + static _Jv_Field *find_field(jclass, jclass, jclass *, _Jv_Utf8Const *, + _Jv_Utf8Const *); + static void check_loading_constraints (_Jv_Method *, jclass, jclass); + static void prepare_constant_time_tables(jclass); + static jshort get_interfaces(jclass, _Jv_ifaces *); + static void link_symbol_table(jclass); + static void link_exception_table(jclass); + static void layout_interface_methods(jclass); + static void set_vtable_entries(jclass, _Jv_VTable *); + static void make_vtable(jclass); + static void ensure_fields_laid_out(jclass); + static void ensure_class_linked(jclass); + static void ensure_supers_installed(jclass); + static void add_miranda_methods(jclass, jclass); + static void ensure_method_table_complete(jclass); + static void verify_class(jclass); + static jshort find_iindex(jclass *, jshort *, jshort); + static jshort indexof(void *, void **, jshort); + static int get_alignment_from_class(jclass); + static void generate_itable(jclass, _Jv_ifaces *, jshort *); + static jshort append_partial_itable(jclass, jclass, void **, jshort); + static _Jv_Method *search_method_in_superclasses (jclass cls, jclass klass, + _Jv_Utf8Const *method_name, + _Jv_Utf8Const *method_signature, + jclass *found_class, + bool check_perms = true); + static void *create_error_method(_Jv_Utf8Const *, jclass); + + /* The least significant bit of the signature pointer in a symbol + table is set to 1 by the compiler if the reference is "special", + i.e. if it is an access to a private field or method. Extract + that bit, clearing it in the address and setting the LSB of + SPECIAL accordingly. */ + static void maybe_adjust_signature (_Jv_Utf8Const *&s, uaddr &special) + { + union { + _Jv_Utf8Const *signature; + uaddr signature_bits; + }; + signature = s; + special = signature_bits & 1; + signature_bits -= special; + s = signature; + } + + static _Jv_Mutex_t resolve_mutex; + static void init (void) __attribute__((constructor)); + +public: + + static bool has_field_p (jclass, _Jv_Utf8Const *); + static void print_class_loaded (jclass); + static void resolve_class_ref (jclass, jclass *); + static void wait_for_state(jclass, int); + static _Jv_Method *resolve_method_entry (jclass, jclass &, + int, int, + bool, bool); + static _Jv_word resolve_pool_entry (jclass, int, bool =false); + static void resolve_field (_Jv_Field *, java::lang::ClassLoader *); + static void verify_type_assertions (jclass); + static _Jv_Method *search_method_in_class (jclass, jclass, + _Jv_Utf8Const *, + _Jv_Utf8Const *, + bool check_perms = true); + static void layout_vtable_methods(jclass); + + static jbyte read_cpool_entry (_Jv_word *data, + const _Jv_Constants *const pool, + int index) + { + _Jv_MutexLock (&resolve_mutex); + jbyte tags = pool->tags[index]; + *data = pool->data[index]; + _Jv_MutexUnlock (&resolve_mutex); + return tags; + } + + static void write_cpool_entry (_Jv_word data, jbyte tags, + _Jv_Constants *pool, + int index) + { + _Jv_MutexLock (&resolve_mutex); + pool->data[index] = data; + pool->tags[index] = tags; + _Jv_MutexUnlock (&resolve_mutex); + } +}; + +/* Type of pointer used as finalizer. */ +typedef void _Jv_FinalizerFunc (jobject); + +/* Allocate space for a new Java object. */ +void *_Jv_AllocObj (jsize size, jclass cl) __attribute__((__malloc__)); +/* Allocate space for a potentially uninitialized pointer-free object. + Interesting only with JV_HASH_SYNCHRONIZATION. */ +void *_Jv_AllocPtrFreeObj (jsize size, jclass cl) __attribute__((__malloc__)); +/* Allocate space for an array of Java objects. */ +void *_Jv_AllocArray (jsize size, jclass cl) __attribute__((__malloc__)); +/* Allocate space that is known to be pointer-free. */ +void *_Jv_AllocBytes (jsize size) __attribute__((__malloc__)); +/* Allocate space for a new non-Java object, which does not have the usual + Java object header but may contain pointers to other GC'ed objects. */ +void *_Jv_AllocRawObj (jsize size) __attribute__((__malloc__)); +/* Allocate a double-indirect pointer to a _Jv_ClosureList such that + the _Jv_ClosureList gets automatically finalized when it is no + longer reachable, not even by other finalizable objects. */ +_Jv_ClosureList **_Jv_ClosureListFinalizer (void) __attribute__((__malloc__)); +/* Explicitly throw an out-of-memory exception. */ +void _Jv_ThrowNoMemory() __attribute__((__noreturn__)); +/* Allocate an object with a single pointer. The first word is reserved + for the GC, and the second word is the traced pointer. */ +void *_Jv_AllocTraceOne (jsize size /* incl. reserved slot */); +/* Ditto, but for two traced pointers. */ +void *_Jv_AllocTraceTwo (jsize size /* incl. reserved slot */); +/* Initialize the GC. */ +void _Jv_InitGC (void); +/* Register a finalizer. */ +void _Jv_RegisterFinalizer (void *object, _Jv_FinalizerFunc *method); +/* Compute the GC descriptor for a class */ +void * _Jv_BuildGCDescr(jclass); + +/* Allocate some unscanned, unmoveable memory. Return NULL if out of + memory. */ +void *_Jv_MallocUnchecked (jsize size) __attribute__((__malloc__)); + +/* Initialize finalizers. The argument is a function to be called + when a finalizer is ready to be run. */ +void _Jv_GCInitializeFinalizers (void (*notifier) (void)); +/* Run finalizers for objects ready to be finalized.. */ +void _Jv_RunFinalizers (void); +/* Run all finalizers. Should be called only before exit. */ +void _Jv_RunAllFinalizers (void); +/* Perform a GC. */ +void _Jv_RunGC (void); +/* Disable and enable GC. */ +void _Jv_DisableGC (void); +void _Jv_EnableGC (void); +/* Register a disappearing link. This is a field F which should be + cleared when *F is found to be inaccessible. This is used in the + implementation of java.lang.ref.Reference. */ +void _Jv_GCRegisterDisappearingLink (jobject *objp); +/* Return true if OBJECT should be reclaimed. This is used to + implement soft references. */ +jboolean _Jv_GCCanReclaimSoftReference (jobject obj); + +/* Register a finalizer for a String object. This is only used by + the intern() implementation. */ +void _Jv_RegisterStringFinalizer (jobject str); +/* This is called to actually finalize a possibly-intern()d String. */ +void _Jv_FinalizeString (jobject str); + +/* Return approximation of total size of heap. */ +long _Jv_GCTotalMemory (void); +/* Return approximation of total free memory. */ +long _Jv_GCFreeMemory (void); + +/* Set initial heap size. If SIZE==0, ignore. Should be run before + _Jv_InitGC. Not required to have any actual effect. */ +void _Jv_GCSetInitialHeapSize (size_t size); + +/* Set maximum heap size. If SIZE==0, unbounded. Should be run + before _Jv_InitGC. Not required to have any actual effect. */ +void _Jv_GCSetMaximumHeapSize (size_t size); + +/* External interface to setting the heap size. Parses ARG (a number + which can optionally have "k" or "m" appended and calls + _Jv_GCSetInitialHeapSize. */ +void _Jv_SetInitialHeapSize (const char *arg); + +/* External interface to setting the maximum heap size. Parses ARG (a + number which can optionally have "k" or "m" appended and calls + _Jv_GCSetMaximumHeapSize. */ +void _Jv_SetMaximumHeapSize (const char *arg); + +/* External interface for setting the GC_free_space_divisor. Calls + GC_set_free_space_divisor and returns the old value. */ +int _Jv_SetGCFreeSpaceDivisor (int div); + +/* Free the method cache, if one was allocated. This is only called + during thread deregistration. */ +void _Jv_FreeMethodCache (); + +/* Set the stack size for threads. Parses ARG, a number which can + optionally have "k" or "m" appended. */ +void _Jv_SetStackSize (const char *arg); + +extern "C" void JvRunMain (jclass klass, int argc, const char **argv); +extern "C" void JvRunMainName (const char *name, int argc, const char **argv); + +void _Jv_RunMain (jclass klass, const char *name, int argc, const char **argv, + bool is_jar); + +void _Jv_RunMain (struct _Jv_VMInitArgs *vm_args, jclass klass, + const char *name, int argc, const char **argv, bool is_jar); + +// Delayed until after _Jv_AllocRawObj is declared. +inline _Jv_VTable * +_Jv_VTable::new_vtable (int count) +{ + size_t size = sizeof(_Jv_VTable) + (count - 1) * vtable_elt_size (); + return (_Jv_VTable *) _Jv_AllocRawObj (size); +} + +// Determine if METH gets an entry in a VTable. +static inline jboolean _Jv_isVirtualMethod (_Jv_Method *meth) +{ + using namespace java::lang::reflect; + return (((meth->accflags & (Modifier::STATIC | Modifier::PRIVATE)) == 0) + && meth->name->first() != '<'); +} + +// This function is used to determine the hash code of an object. +inline jint +_Jv_HashCode (jobject obj) +{ + // This was chosen to yield relatively well distributed results on + // both 32- and 64-bit architectures. Note 0x7fffffff is prime. + // FIXME: we assume sizeof(long) == sizeof(void *). + return (jint) ((unsigned long) obj % 0x7fffffff); +} + +// Return a raw pointer to the elements of an array given the array +// and its element type. You might think we could just pick a single +// array type and use elements() on it, but we can't because we must +// account for alignment of the element type. When ARRAY is null, we +// obtain the number of bytes taken by the base part of the array. +inline char * +_Jv_GetArrayElementFromElementType (jobject array, + jclass element_type) +{ + char *elts; + if (element_type == JvPrimClass (byte)) + elts = (char *) elements ((jbyteArray) array); + else if (element_type == JvPrimClass (short)) + elts = (char *) elements ((jshortArray) array); + else if (element_type == JvPrimClass (int)) + elts = (char *) elements ((jintArray) array); + else if (element_type == JvPrimClass (long)) + elts = (char *) elements ((jlongArray) array); + else if (element_type == JvPrimClass (boolean)) + elts = (char *) elements ((jbooleanArray) array); + else if (element_type == JvPrimClass (char)) + elts = (char *) elements ((jcharArray) array); + else if (element_type == JvPrimClass (float)) + elts = (char *) elements ((jfloatArray) array); + else if (element_type == JvPrimClass (double)) + elts = (char *) elements ((jdoubleArray) array); + else + elts = (char *) elements ((jobjectArray) array); + return elts; +} + +extern "C" void _Jv_ThrowBadArrayIndex (jint bad_index) + __attribute__((noreturn)); +extern "C" void _Jv_ThrowNullPointerException (void) + __attribute__((noreturn)); +extern "C" void _Jv_ThrowNoSuchMethodError (void) + __attribute__((noreturn)); +extern "C" void _Jv_ThrowNoSuchFieldError (int) + __attribute__((noreturn)); +extern "C" jobject _Jv_NewArray (jint type, jint size) + __attribute__((__malloc__)); +extern "C" jobject _Jv_NewMultiArray (jclass klass, jint dims, ...) + __attribute__((__malloc__)); +extern "C" void *_Jv_CheckCast (jclass klass, jobject obj); +extern "C" void *_Jv_LookupInterfaceMethod (jclass klass, Utf8Const *name, + Utf8Const *signature); +extern "C" void *_Jv_LookupInterfaceMethodIdx (jclass klass, jclass iface, + int meth_idx); +extern "C" void _Jv_CheckArrayStore (jobject array, jobject obj); +extern "C" void _Jv_RegisterClass (jclass klass); +extern "C" void _Jv_RegisterClasses (const jclass *classes); +extern "C" void _Jv_RegisterClasses_Counted (const jclass *classes, + size_t count); +extern "C" void _Jv_RegisterResource (void *vptr); +extern void _Jv_UnregisterClass (_Jv_Utf8Const*, java::lang::ClassLoader*); + +extern "C" jobject _Jv_UnwrapJNIweakReference (jobject); + +extern jclass _Jv_FindClass (_Jv_Utf8Const *name, + java::lang::ClassLoader *loader); + +extern jclass _Jv_FindClassNoException (_Jv_Utf8Const *name, + java::lang::ClassLoader *loader); + +extern jclass _Jv_FindClassFromSignature (char *, + java::lang::ClassLoader *loader, + char ** = NULL); + +extern jclass _Jv_FindClassFromSignatureNoException (char *, + java::lang::ClassLoader *loader, + char ** = NULL); + +extern void _Jv_GetTypesFromSignature (jmethodID method, + jclass declaringClass, + JArray<jclass> **arg_types_out, + jclass *return_type_out); + +extern jboolean _Jv_CheckAccess (jclass self_klass, jclass other_klass, + jint flags); + +extern jobject _Jv_CallAnyMethodA (jobject obj, jclass return_type, + jmethodID meth, jboolean is_constructor, + JArray<jclass> *parameter_types, + jobjectArray args, + jclass iface = NULL); + +union jvalue; +extern void _Jv_CallAnyMethodA (jobject obj, + jclass return_type, + jmethodID meth, + jboolean is_constructor, + jboolean is_virtual_call, + JArray<jclass> *parameter_types, + const jvalue *args, + jvalue *result, + jboolean is_jni_call = true, + jclass iface = NULL); + +extern void _Jv_CheckOrCreateLoadingConstraint (jclass, + java::lang::ClassLoader *); + +extern jobject _Jv_NewMultiArray (jclass, jint ndims, jint* dims) + __attribute__((__malloc__)); + +extern "C" void _Jv_ThrowAbstractMethodError () __attribute__((__noreturn__)); + +/* Checked divide subroutines. */ +extern "C" +{ + jint _Jv_divI (jint, jint); + jint _Jv_remI (jint, jint); + jlong _Jv_divJ (jlong, jlong); + jlong _Jv_remJ (jlong, jlong); +} + +/* Get the number of arguments (cf. argc) or 0 if our argument + list was never initialized. */ +extern int _Jv_GetNbArgs (void); + +/* Get the specified argument (cf. argv[index]) or "" if either + our argument list was never initialized or the specified index + is out of bounds. */ +extern const char * _Jv_GetSafeArg (int index); + +/* Sets our argument list. Can be used by programs with non-standard + entry points. */ +extern void _Jv_SetArgs (int argc, const char **argv); + +/* Get the name of the running executable. */ +extern const char *_Jv_ThisExecutable (void); + +/* Return a pointer to a symbol in executable or loaded library. */ +void *_Jv_FindSymbolInExecutable (const char *); + +/* Initialize JNI. */ +extern void _Jv_JNI_Init (void); + +/* Get or set the per-thread JNIEnv used by the invocation API. */ +_Jv_JNIEnv *_Jv_GetCurrentJNIEnv (); +void _Jv_SetCurrentJNIEnv (_Jv_JNIEnv *); + +/* Free a JNIEnv. */ +void _Jv_FreeJNIEnv (_Jv_JNIEnv *); + +extern "C" void _Jv_JNI_PopSystemFrame (_Jv_JNIEnv *); +_Jv_JNIEnv *_Jv_GetJNIEnvNewFrameWithLoader (::java::lang::ClassLoader *); + +struct _Jv_JavaVM; +_Jv_JavaVM *_Jv_GetJavaVM (); + +/* Get a JVMTI environment */ +struct _Jv_JVMTIEnv; +_Jv_JVMTIEnv *_Jv_GetJVMTIEnv (void); + +/* Initialize JVMTI */ +extern void _Jv_JVMTI_Init (void); + +// Some verification functions from defineclass.cc. +bool _Jv_VerifyFieldSignature (_Jv_Utf8Const*sig); +bool _Jv_VerifyMethodSignature (_Jv_Utf8Const*sig); +bool _Jv_VerifyClassName (unsigned char* ptr, _Jv_ushort length); +bool _Jv_VerifyClassName (_Jv_Utf8Const *name); +bool _Jv_VerifyIdentifier (_Jv_Utf8Const *); +bool _Jv_ClassNameSamePackage (_Jv_Utf8Const *name1, _Jv_Utf8Const *name2); + +struct _Jv_core_chain +{ + int name_length; + const char *name; + int data_length; + const void *data; + + struct _Jv_core_chain *next; +}; + +// This is called when new core data is loaded. +extern void (*_Jv_RegisterCoreHook) (_Jv_core_chain *); + +_Jv_core_chain *_Jv_FindCore (_Jv_core_chain *node, jstring name); +void _Jv_FreeCoreChain (_Jv_core_chain *chain); + +#ifdef ENABLE_JVMPI + +#include "jvmpi.h" + +extern void (*_Jv_JVMPI_Notify_OBJECT_ALLOC) (JVMPI_Event *event); +extern void (*_Jv_JVMPI_Notify_THREAD_START) (JVMPI_Event *event); +extern void (*_Jv_JVMPI_Notify_THREAD_END) (JVMPI_Event *event); +#endif + +/* FIXME: this should really be defined in some more generic place */ +#define ROUND(V, A) (((((unsigned) (V))-1) | ((A)-1))+1) + +extern void _Jv_RegisterBootstrapPackages (); + +#define FLAG_BINARYCOMPAT_ABI (1<<31) /* Class is built with the BC-ABI. */ + +#define FLAG_BOOTSTRAP_LOADER (1<<30) /* Used when defining a class that + should be loaded by the bootstrap + loader. */ + +// These are used to find ABI versions we recognize. +#define GCJ_CXX_ABI_VERSION (__GNUC__ * 100000 + __GNUC_MINOR__ * 1000) + +// This is the old-style BC version ID used by GCJ 4.0.0. +#define OLD_GCJ_40_BC_ABI_VERSION (4 * 10000 + 0 * 10 + 5) + +// New style version IDs used by GCJ 4.0.1 and later. +#define GCJ_40_BC_ABI_VERSION (4 * 100000 + 0 * 1000) + +void _Jv_CheckABIVersion (unsigned long value); + + +inline bool +_Jv_ClassForBootstrapLoader (unsigned long value) +{ + return (value & FLAG_BOOTSTRAP_LOADER); +} + +// It makes the source cleaner if we simply always define this +// function. If the interpreter is not built, it will never return +// 'true'. +extern inline jboolean +_Jv_IsInterpretedClass (jclass c) +{ + return (c->accflags & java::lang::reflect::Modifier::INTERPRETED) != 0; +} + +// Return true if the class was compiled with the BC ABI. +extern inline jboolean +_Jv_IsBinaryCompatibilityABI (jclass c) +{ + // There isn't really a better test for the ABI type at this point, + // that will work once the class has been registered. + return c->otable_syms || c->atable_syms || c->itable_syms; +} + +// Returns whether the given class does not really exists (ie. we have no +// bytecode) but still allows us to do some very conservative actions. +// E.g. throwing a NoClassDefFoundError with the name of the missing +// class. +extern inline jboolean +_Jv_IsPhantomClass (jclass c) +{ + return c->state == JV_STATE_PHANTOM; +} + +// A helper function defined in prims.cc. +char* _Jv_PrependVersionedLibdir (char* libpath); + + +// An enum for use with JvSetThreadState. We use a C++ enum rather +// than the Java enum to avoid problems with class initialization +// during VM bootstrap. +typedef enum +{ + JV_BLOCKED, + JV_NEW, + JV_RUNNABLE, + JV_TERMINATED, + JV_TIMED_WAITING, + JV_WAITING +} JvThreadState; + +// Temporarily set the thread's state. +class JvSetThreadState +{ +private: + ::java::lang::Thread *thread; + jint saved; + +public: + + // Note that 'cthread' could be NULL -- during VM startup there may + // not be a Thread available. + JvSetThreadState(::java::lang::Thread *cthread, JvThreadState nstate) + : thread (cthread), + saved (cthread ? cthread->state : (jint)JV_NEW) + { + if (thread) + thread->state = nstate; + } + + ~JvSetThreadState() + { + if (thread) + thread->state = saved; + } +}; + +// This structure is used to represent all the data the native side +// needs. An object of this type is assigned to the `data' member of +// the Thread class. +struct natThread +{ + // A thread is either alive, dead, or being sent a signal; if it is + // being sent a signal, it is also alive. Thus, if you want to know + // if a thread is alive, it is sufficient to test alive_status != + // THREAD_DEAD. + volatile obj_addr_t alive_flag; + + // These are used to interrupt sleep and join calls. We can share a + // condition variable here since it only ever gets notified when the thread + // exits. + _Jv_Mutex_t join_mutex; + _Jv_ConditionVariable_t join_cond; + + // These are used by Unsafe.park() and Unsafe.unpark(). + ParkHelper park_helper; + + // This is private data for the thread system layer. + _Jv_Thread_t *thread; + + // Each thread has its own JNI object. + _Jv_JNIEnv *jni_env; +}; + +#endif /* __JAVA_JVM_H__ */ |