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Diffstat (limited to 'libjava/prims.cc')
| -rw-r--r-- | libjava/prims.cc | 2038 |
1 files changed, 2038 insertions, 0 deletions
diff --git a/libjava/prims.cc b/libjava/prims.cc new file mode 100644 index 000000000..652cf5b4a --- /dev/null +++ b/libjava/prims.cc @@ -0,0 +1,2038 @@ +// prims.cc - Code for core of runtime environment. + +/* Copyright (C) 1998, 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. */ + +#include <config.h> +#include <platform.h> + +#include <stdlib.h> +#include <stdarg.h> +#include <stdio.h> +#include <string.h> +#include <signal.h> + +#ifdef HAVE_UNISTD_H +#include <unistd.h> +#endif + +#include <gcj/cni.h> +#include <jvm.h> +#include <java-signal.h> +#include <java-threads.h> +#include <java-interp.h> + +#ifdef ENABLE_JVMPI +#include <jvmpi.h> +#include <java/lang/ThreadGroup.h> +#endif + +#ifdef INTERPRETER +#include <jvmti.h> +#include "jvmti-int.h" +#endif + +#ifndef DISABLE_GETENV_PROPERTIES +#include <java-props.h> +#define PROCESS_GCJ_PROPERTIES process_gcj_properties() +#else +#define PROCESS_GCJ_PROPERTIES +#endif // DISABLE_GETENV_PROPERTIES + +#include <java/lang/Class.h> +#include <java/lang/ClassLoader.h> +#include <java/lang/Runtime.h> +#include <java/lang/String.h> +#include <java/lang/Thread.h> +#include <java/lang/ThreadGroup.h> +#include <java/lang/ArrayIndexOutOfBoundsException.h> +#include <java/lang/ArithmeticException.h> +#include <java/lang/ClassFormatError.h> +#include <java/lang/ClassNotFoundException.h> +#include <java/lang/InternalError.h> +#include <java/lang/NegativeArraySizeException.h> +#include <java/lang/NoClassDefFoundError.h> +#include <java/lang/NullPointerException.h> +#include <java/lang/OutOfMemoryError.h> +#include <java/lang/System.h> +#include <java/lang/VMClassLoader.h> +#include <java/lang/reflect/Modifier.h> +#include <java/io/PrintStream.h> +#include <java/lang/UnsatisfiedLinkError.h> +#include <java/lang/VirtualMachineError.h> +#include <gnu/gcj/runtime/ExtensionClassLoader.h> +#include <gnu/gcj/runtime/FinalizerThread.h> +#include <execution.h> + +#ifdef INTERPRETER +#include <gnu/classpath/jdwp/Jdwp.h> +#include <gnu/classpath/jdwp/VMVirtualMachine.h> +#endif // INTERPRETER + +#include <gnu/java/lang/MainThread.h> + +#ifdef USE_LTDL +#include <ltdl.h> +#endif + +// Execution engine for compiled code. +_Jv_CompiledEngine _Jv_soleCompiledEngine; + +// Execution engine for code compiled with -findirect-classes +_Jv_IndirectCompiledEngine _Jv_soleIndirectCompiledEngine; + +// We allocate a single OutOfMemoryError exception which we keep +// around for use if we run out of memory. +static java::lang::OutOfMemoryError *no_memory; + +// Number of bytes in largest array object we create. This could be +// increased to the largest size_t value, so long as the appropriate +// functions are changed to take a size_t argument instead of jint. +#define MAX_OBJECT_SIZE (((size_t)1<<31) - 1) + +// Properties set at compile time. +const char **_Jv_Compiler_Properties = NULL; +int _Jv_Properties_Count = 0; + +#ifndef DISABLE_GETENV_PROPERTIES +// Property key/value pairs. +property_pair *_Jv_Environment_Properties; +#endif + +// Stash the argv pointer to benefit native libraries that need it. +const char **_Jv_argv; +int _Jv_argc; + +// Debugging options +static bool remoteDebug = false; +#ifdef INTERPRETER +static char defaultJdwpOptions[] = ""; +static char *jdwpOptions = defaultJdwpOptions; + +// Typedefs for JVMTI agent functions. +typedef jint jvmti_agent_onload_func (JavaVM *vm, char *options, + void *reserved); +typedef jint jvmti_agent_onunload_func (JavaVM *vm); + +// JVMTI agent function pointers. +static jvmti_agent_onload_func *jvmti_agentonload = NULL; +static jvmti_agent_onunload_func *jvmti_agentonunload = NULL; +static char *jvmti_agent_opts; +#endif // INTERPRETER + +// Argument support. +int +_Jv_GetNbArgs (void) +{ + // _Jv_argc is 0 if not explicitly initialized. + return _Jv_argc; +} + +const char * +_Jv_GetSafeArg (int index) +{ + if (index >=0 && index < _Jv_GetNbArgs ()) + return _Jv_argv[index]; + else + return ""; +} + +void +_Jv_SetArgs (int argc, const char **argv) +{ + _Jv_argc = argc; + _Jv_argv = argv; +} + +#ifdef ENABLE_JVMPI +// Pointer to JVMPI notification functions. +void (*_Jv_JVMPI_Notify_OBJECT_ALLOC) (JVMPI_Event *event); +void (*_Jv_JVMPI_Notify_THREAD_START) (JVMPI_Event *event); +void (*_Jv_JVMPI_Notify_THREAD_END) (JVMPI_Event *event); +#endif + + +#if defined (HANDLE_SEGV) || defined(HANDLE_FPE) +/* Unblock a signal. Unless we do this, the signal may only be sent + once. */ +static void +unblock_signal (int signum __attribute__ ((__unused__))) +{ +#ifdef _POSIX_VERSION + sigset_t sigs; + + sigemptyset (&sigs); + sigaddset (&sigs, signum); + sigprocmask (SIG_UNBLOCK, &sigs, NULL); +#endif +} +#endif + +#ifdef HANDLE_SEGV +SIGNAL_HANDLER (catch_segv) +{ + unblock_signal (SIGSEGV); + MAKE_THROW_FRAME (nullp); + java::lang::NullPointerException *nullp + = new java::lang::NullPointerException; + throw nullp; +} +#endif + +#ifdef HANDLE_FPE +SIGNAL_HANDLER (catch_fpe) +{ + unblock_signal (SIGFPE); +#ifdef HANDLE_DIVIDE_OVERFLOW + HANDLE_DIVIDE_OVERFLOW; +#else + MAKE_THROW_FRAME (arithexception); +#endif + java::lang::ArithmeticException *arithexception + = new java::lang::ArithmeticException (JvNewStringLatin1 ("/ by zero")); + throw arithexception; +} +#endif + + +jboolean +_Jv_equalUtf8Consts (const Utf8Const* a, const Utf8Const *b) +{ + int len; + const _Jv_ushort *aptr, *bptr; + if (a == b) + return true; + if (a->hash != b->hash) + return false; + len = a->length; + if (b->length != len) + return false; + aptr = (const _Jv_ushort *)a->data; + bptr = (const _Jv_ushort *)b->data; + len = (len + 1) >> 1; + while (--len >= 0) + if (*aptr++ != *bptr++) + return false; + return true; +} + +/* True iff A is equal to STR. + HASH is STR->hashCode(). +*/ + +jboolean +_Jv_equal (Utf8Const* a, jstring str, jint hash) +{ + if (a->hash != (_Jv_ushort) hash) + return false; + jint len = str->length(); + jint i = 0; + jchar *sptr = _Jv_GetStringChars (str); + unsigned char* ptr = (unsigned char*) a->data; + unsigned char* limit = ptr + a->length; + for (;; i++, sptr++) + { + int ch = UTF8_GET (ptr, limit); + if (i == len) + return ch < 0; + if (ch != *sptr) + return false; + } + return true; +} + +/* Like _Jv_equal, but stop after N characters. */ +jboolean +_Jv_equaln (Utf8Const *a, jstring str, jint n) +{ + jint len = str->length(); + jint i = 0; + jchar *sptr = _Jv_GetStringChars (str); + unsigned char* ptr = (unsigned char*) a->data; + unsigned char* limit = ptr + a->length; + for (; n-- > 0; i++, sptr++) + { + int ch = UTF8_GET (ptr, limit); + if (i == len) + return ch < 0; + if (ch != *sptr) + return false; + } + return true; +} + +// Determines whether the given Utf8Const object contains +// a type which is primitive or some derived form of it, eg. +// an array or multi-dimensional array variant. +jboolean +_Jv_isPrimitiveOrDerived(const Utf8Const *a) +{ + unsigned char *aptr = (unsigned char *) a->data; + unsigned char *alimit = aptr + a->length; + int ac = UTF8_GET(aptr, alimit); + + // Skips any leading array marks. + while (ac == '[') + ac = UTF8_GET(aptr, alimit); + + // There should not be another character. This implies that + // the type name is only one character long. + if (UTF8_GET(aptr, alimit) == -1) + switch ( ac ) + { + case 'Z': + case 'B': + case 'C': + case 'S': + case 'I': + case 'J': + case 'F': + case 'D': + return true; + default: + break; + } + + return false; +} + +// Find out whether two _Jv_Utf8Const candidates contain the same +// classname. +// The method is written to handle the different formats of classnames. +// Eg. "Ljava/lang/Class;", "Ljava.lang.Class;", "java/lang/Class" and +// "java.lang.Class" will be seen as equal. +// Warning: This function is not smart enough to declare "Z" and "boolean" +// and similar cases as equal (and is not meant to be used this way)! +jboolean +_Jv_equalUtf8Classnames (const Utf8Const *a, const Utf8Const *b) +{ + // If the class name's length differs by two characters + // it is possible that we have candidates which are given + // in the two different formats ("Lp1/p2/cn;" vs. "p1/p2/cn") + switch (a->length - b->length) + { + case -2: + case 0: + case 2: + break; + default: + return false; + } + + unsigned char *aptr = (unsigned char *) a->data; + unsigned char *alimit = aptr + a->length; + unsigned char *bptr = (unsigned char *) b->data; + unsigned char *blimit = bptr + b->length; + + if (alimit[-1] == ';') + alimit--; + + if (blimit[-1] == ';') + blimit--; + + int ac = UTF8_GET(aptr, alimit); + int bc = UTF8_GET(bptr, blimit); + + // Checks whether both strings have the same amount of leading [ characters. + while (ac == '[') + { + if (bc == '[') + { + ac = UTF8_GET(aptr, alimit); + bc = UTF8_GET(bptr, blimit); + continue; + } + + return false; + } + + // Skips leading L character. + if (ac == 'L') + ac = UTF8_GET(aptr, alimit); + + if (bc == 'L') + bc = UTF8_GET(bptr, blimit); + + // Compares the remaining characters. + while (ac != -1 && bc != -1) + { + // Replaces package separating dots with slashes. + if (ac == '.') + ac = '/'; + + if (bc == '.') + bc = '/'; + + // Now classnames differ if there is at least one non-matching + // character. + if (ac != bc) + return false; + + ac = UTF8_GET(aptr, alimit); + bc = UTF8_GET(bptr, blimit); + } + + return (ac == bc); +} + +/* Count the number of Unicode chars encoded in a given Ut8 string. */ +int +_Jv_strLengthUtf8(const char* str, int len) +{ + unsigned char* ptr; + unsigned char* limit; + int str_length; + + ptr = (unsigned char*) str; + limit = ptr + len; + str_length = 0; + for (; ptr < limit; str_length++) + { + if (UTF8_GET (ptr, limit) < 0) + return (-1); + } + return (str_length); +} + +/* Calculate a hash value for a string encoded in Utf8 format. + * This returns the same hash value as specified or java.lang.String.hashCode. + */ +jint +_Jv_hashUtf8String (const char* str, int len) +{ + unsigned char* ptr = (unsigned char*) str; + unsigned char* limit = ptr + len; + jint hash = 0; + + for (; ptr < limit;) + { + int ch = UTF8_GET (ptr, limit); + /* Updated specification from + http://www.javasoft.com/docs/books/jls/clarify.html. */ + hash = (31 * hash) + ch; + } + return hash; +} + +void +_Jv_Utf8Const::init(const char *s, int len) +{ + ::memcpy (data, s, len); + data[len] = 0; + length = len; + hash = _Jv_hashUtf8String (s, len) & 0xFFFF; +} + +_Jv_Utf8Const * +_Jv_makeUtf8Const (const char* s, int len) +{ + if (len < 0) + len = strlen (s); + Utf8Const* m + = (Utf8Const*) _Jv_AllocBytes (_Jv_Utf8Const::space_needed(s, len)); + m->init(s, len); + return m; +} + +_Jv_Utf8Const * +_Jv_makeUtf8Const (jstring string) +{ + jint hash = string->hashCode (); + jint len = _Jv_GetStringUTFLength (string); + + Utf8Const* m = (Utf8Const*) + _Jv_AllocBytes (sizeof(Utf8Const) + len + 1); + + m->hash = hash; + m->length = len; + + _Jv_GetStringUTFRegion (string, 0, string->length (), m->data); + m->data[len] = 0; + + return m; +} + + + +#ifdef __GCJ_DEBUG +void +_Jv_Abort (const char *function, const char *file, int line, + const char *message) +#else +void +_Jv_Abort (const char *, const char *, int, const char *message) +#endif +{ +#ifdef __GCJ_DEBUG + fprintf (stderr, + "libgcj failure: %s\n in function %s, file %s, line %d\n", + message, function, file, line); +#else + fprintf (stderr, "libgcj failure: %s\n", message); +#endif + fflush (stderr); + abort (); +} + +static void +fail_on_finalization (jobject) +{ + JvFail ("object was finalized"); +} + +void +_Jv_GCWatch (jobject obj) +{ + _Jv_RegisterFinalizer (obj, fail_on_finalization); +} + +void +_Jv_ThrowBadArrayIndex(jint bad_index) +{ + throw new java::lang::ArrayIndexOutOfBoundsException + (java::lang::String::valueOf (bad_index)); +} + +void +_Jv_ThrowNullPointerException () +{ + throw new java::lang::NullPointerException; +} + +// Resolve an entry in the constant pool and return the target +// address. +void * +_Jv_ResolvePoolEntry (jclass this_class, jint index) +{ + _Jv_Constants *pool = &this_class->constants; + + if ((pool->tags[index] & JV_CONSTANT_ResolvedFlag) != 0) + return pool->data[index].field->u.addr; + + JvSynchronize sync (this_class); + return (_Jv_Linker::resolve_pool_entry (this_class, index)) + .field->u.addr; +} + + +// Explicitly throw a no memory exception. +// The collector calls this when it encounters an out-of-memory condition. +void _Jv_ThrowNoMemory() +{ + throw no_memory; +} + +#ifdef ENABLE_JVMPI +# define JVMPI_NOTIFY_ALLOC(klass,size,obj) \ + if (__builtin_expect (_Jv_JVMPI_Notify_OBJECT_ALLOC != 0, false)) \ + jvmpi_notify_alloc(klass,size,obj); +static void +jvmpi_notify_alloc(jclass klass, jint size, jobject obj) +{ + // Service JVMPI allocation request. + JVMPI_Event event; + + event.event_type = JVMPI_EVENT_OBJECT_ALLOC; + event.env_id = NULL; + event.u.obj_alloc.arena_id = 0; + event.u.obj_alloc.class_id = (jobjectID) klass; + event.u.obj_alloc.is_array = 0; + event.u.obj_alloc.size = size; + event.u.obj_alloc.obj_id = (jobjectID) obj; + + // FIXME: This doesn't look right for the Boehm GC. A GC may + // already be in progress. _Jv_DisableGC () doesn't wait for it. + // More importantly, I don't see the need for disabling GC, since we + // blatantly have a pointer to obj on our stack, ensuring that the + // object can't be collected. Even for a nonconservative collector, + // it appears to me that this must be true, since we are about to + // return obj. Isn't this whole approach way too intrusive for + // a useful profiling interface? - HB + _Jv_DisableGC (); + (*_Jv_JVMPI_Notify_OBJECT_ALLOC) (&event); + _Jv_EnableGC (); +} +#else /* !ENABLE_JVMPI */ +# define JVMPI_NOTIFY_ALLOC(klass,size,obj) /* do nothing */ +#endif + +// Allocate a new object of class KLASS. +// First a version that assumes that we have no finalizer, and that +// the class is already initialized. +// If we know that JVMPI is disabled, this can be replaced by a direct call +// to the allocator for the appropriate GC. +jobject +_Jv_AllocObjectNoInitNoFinalizer (jclass klass) +{ + jint size = klass->size (); + jobject obj = (jobject) _Jv_AllocObj (size, klass); + JVMPI_NOTIFY_ALLOC (klass, size, obj); + return obj; +} + +// And now a version that initializes if necessary. +jobject +_Jv_AllocObjectNoFinalizer (jclass klass) +{ + if (_Jv_IsPhantomClass(klass) ) + throw new java::lang::NoClassDefFoundError(klass->getName()); + + _Jv_InitClass (klass); + jint size = klass->size (); + jobject obj = (jobject) _Jv_AllocObj (size, klass); + JVMPI_NOTIFY_ALLOC (klass, size, obj); + return obj; +} + +// And now the general version that registers a finalizer if necessary. +jobject +_Jv_AllocObject (jclass klass) +{ + jobject obj = _Jv_AllocObjectNoFinalizer (klass); + + // We assume that the compiler only generates calls to this routine + // if there really is an interesting finalizer. + // Unfortunately, we still have to the dynamic test, since there may + // be cni calls to this routine. + // Note that on IA64 get_finalizer() returns the starting address of the + // function, not a function pointer. Thus this still works. + if (klass->vtable->get_finalizer () + != java::lang::Object::class$.vtable->get_finalizer ()) + _Jv_RegisterFinalizer (obj, _Jv_FinalizeObject); + return obj; +} + +// Allocate a String, including variable length storage. +jstring +_Jv_AllocString(jsize len) +{ + using namespace java::lang; + + jsize sz = sizeof(java::lang::String) + len * sizeof(jchar); + + // We assert that for strings allocated this way, the data field + // will always point to the object itself. Thus there is no reason + // for the garbage collector to scan any of it. + // Furthermore, we're about to overwrite the string data, so + // initialization of the object is not an issue. + + // String needs no initialization, and there is no finalizer, so + // we can go directly to the collector's allocator interface. + jstring obj = (jstring) _Jv_AllocPtrFreeObj(sz, &String::class$); + + obj->data = obj; + obj->boffset = sizeof(java::lang::String); + obj->count = len; + obj->cachedHashCode = 0; + + JVMPI_NOTIFY_ALLOC (&String::class$, sz, obj); + + return obj; +} + +// A version of the above that assumes the object contains no pointers, +// and requires no finalization. This can't happen if we need pointers +// to locks. +#ifdef JV_HASH_SYNCHRONIZATION +jobject +_Jv_AllocPtrFreeObject (jclass klass) +{ + _Jv_InitClass (klass); + jint size = klass->size (); + + jobject obj = (jobject) _Jv_AllocPtrFreeObj (size, klass); + + JVMPI_NOTIFY_ALLOC (klass, size, obj); + + return obj; +} +#endif /* JV_HASH_SYNCHRONIZATION */ + + +// Allocate a new array of Java objects. Each object is of type +// `elementClass'. `init' is used to initialize each slot in the +// array. +jobjectArray +_Jv_NewObjectArray (jsize count, jclass elementClass, jobject init) +{ + // Creating an array of an unresolved type is impossible. So we throw + // the NoClassDefFoundError. + if ( _Jv_IsPhantomClass(elementClass) ) + throw new java::lang::NoClassDefFoundError(elementClass->getName()); + + if (__builtin_expect (count < 0, false)) + throw new java::lang::NegativeArraySizeException; + + JvAssert (! elementClass->isPrimitive ()); + + // Ensure that elements pointer is properly aligned. + jobjectArray obj = NULL; + size_t size = (size_t) elements (obj); + // Check for overflow. + if (__builtin_expect ((size_t) count > + (MAX_OBJECT_SIZE - 1 - size) / sizeof (jobject), false)) + throw no_memory; + + size += count * sizeof (jobject); + + jclass klass = _Jv_GetArrayClass (elementClass, + elementClass->getClassLoaderInternal()); + + obj = (jobjectArray) _Jv_AllocArray (size, klass); + // Cast away const. + jsize *lp = const_cast<jsize *> (&obj->length); + *lp = count; + // We know the allocator returns zeroed memory. So don't bother + // zeroing it again. + if (init) + { + jobject *ptr = elements(obj); + while (--count >= 0) + *ptr++ = init; + } + return obj; +} + +// Allocate a new array of primitives. ELTYPE is the type of the +// element, COUNT is the size of the array. +jobject +_Jv_NewPrimArray (jclass eltype, jint count) +{ + int elsize = eltype->size(); + if (__builtin_expect (count < 0, false)) + throw new java::lang::NegativeArraySizeException; + + JvAssert (eltype->isPrimitive ()); + jobject dummy = NULL; + size_t size = (size_t) _Jv_GetArrayElementFromElementType (dummy, eltype); + + // Check for overflow. + if (__builtin_expect ((size_t) count > + (MAX_OBJECT_SIZE - size) / elsize, false)) + throw no_memory; + + jclass klass = _Jv_GetArrayClass (eltype, 0); + +# ifdef JV_HASH_SYNCHRONIZATION + // Since the vtable is always statically allocated, + // these are completely pointerfree! Make sure the GC doesn't touch them. + __JArray *arr = + (__JArray*) _Jv_AllocPtrFreeObj (size + elsize * count, klass); + memset((char *)arr + size, 0, elsize * count); +# else + __JArray *arr = (__JArray*) _Jv_AllocObj (size + elsize * count, klass); + // Note that we assume we are given zeroed memory by the allocator. +# endif + // Cast away const. + jsize *lp = const_cast<jsize *> (&arr->length); + *lp = count; + + return arr; +} + +jobject +_Jv_NewArray (jint type, jint size) +{ + switch (type) + { + case 4: return JvNewBooleanArray (size); + case 5: return JvNewCharArray (size); + case 6: return JvNewFloatArray (size); + case 7: return JvNewDoubleArray (size); + case 8: return JvNewByteArray (size); + case 9: return JvNewShortArray (size); + case 10: return JvNewIntArray (size); + case 11: return JvNewLongArray (size); + } + throw new java::lang::InternalError + (JvNewStringLatin1 ("invalid type code in _Jv_NewArray")); +} + +// Allocate a possibly multi-dimensional array but don't check that +// any array length is <0. +static jobject +_Jv_NewMultiArrayUnchecked (jclass type, jint dimensions, jint *sizes) +{ + JvAssert (type->isArray()); + jclass element_type = type->getComponentType(); + jobject result; + if (element_type->isPrimitive()) + result = _Jv_NewPrimArray (element_type, sizes[0]); + else + result = _Jv_NewObjectArray (sizes[0], element_type, NULL); + + if (dimensions > 1) + { + JvAssert (! element_type->isPrimitive()); + JvAssert (element_type->isArray()); + jobject *contents = elements ((jobjectArray) result); + for (int i = 0; i < sizes[0]; ++i) + contents[i] = _Jv_NewMultiArrayUnchecked (element_type, dimensions - 1, + sizes + 1); + } + + return result; +} + +jobject +_Jv_NewMultiArray (jclass type, jint dimensions, jint *sizes) +{ + for (int i = 0; i < dimensions; ++i) + if (sizes[i] < 0) + throw new java::lang::NegativeArraySizeException; + + return _Jv_NewMultiArrayUnchecked (type, dimensions, sizes); +} + +jobject +_Jv_NewMultiArray (jclass array_type, jint dimensions, ...) +{ + // Creating an array of an unresolved type is impossible. So we throw + // the NoClassDefFoundError. + if (_Jv_IsPhantomClass(array_type)) + throw new java::lang::NoClassDefFoundError(array_type->getName()); + + va_list args; + jint sizes[dimensions]; + va_start (args, dimensions); + for (int i = 0; i < dimensions; ++i) + { + jint size = va_arg (args, jint); + if (size < 0) + throw new java::lang::NegativeArraySizeException; + sizes[i] = size; + } + va_end (args); + + return _Jv_NewMultiArrayUnchecked (array_type, dimensions, sizes); +} + + + +// Ensure 8-byte alignment, for hash synchronization. +#define DECLARE_PRIM_TYPE(NAME) \ + java::lang::Class _Jv_##NAME##Class __attribute__ ((aligned (8))); + +DECLARE_PRIM_TYPE(byte) +DECLARE_PRIM_TYPE(short) +DECLARE_PRIM_TYPE(int) +DECLARE_PRIM_TYPE(long) +DECLARE_PRIM_TYPE(boolean) +DECLARE_PRIM_TYPE(char) +DECLARE_PRIM_TYPE(float) +DECLARE_PRIM_TYPE(double) +DECLARE_PRIM_TYPE(void) + +void +_Jv_InitPrimClass (jclass cl, const char *cname, char sig, int len) +{ + using namespace java::lang::reflect; + + // We must set the vtable for the class; the Java constructor + // doesn't do this. + (*(_Jv_VTable **) cl) = java::lang::Class::class$.vtable; + + // Initialize the fields we care about. We do this in the same + // order they are declared in Class.h. + cl->name = _Jv_makeUtf8Const ((char *) cname, -1); + cl->accflags = Modifier::PUBLIC | Modifier::FINAL | Modifier::ABSTRACT; + cl->method_count = sig; + cl->size_in_bytes = len; + cl->vtable = JV_PRIMITIVE_VTABLE; + cl->state = JV_STATE_DONE; + cl->depth = -1; +} + +jclass +_Jv_FindClassFromSignature (char *sig, java::lang::ClassLoader *loader, + char **endp) +{ + // First count arrays. + int array_count = 0; + while (*sig == '[') + { + ++sig; + ++array_count; + } + + jclass result = NULL; + switch (*sig) + { + case 'B': + result = JvPrimClass (byte); + break; + case 'S': + result = JvPrimClass (short); + break; + case 'I': + result = JvPrimClass (int); + break; + case 'J': + result = JvPrimClass (long); + break; + case 'Z': + result = JvPrimClass (boolean); + break; + case 'C': + result = JvPrimClass (char); + break; + case 'F': + result = JvPrimClass (float); + break; + case 'D': + result = JvPrimClass (double); + break; + case 'V': + result = JvPrimClass (void); + break; + case 'L': + { + char *save = ++sig; + while (*sig && *sig != ';') + ++sig; + // Do nothing if signature appears to be malformed. + if (*sig == ';') + { + _Jv_Utf8Const *name = _Jv_makeUtf8Const (save, sig - save); + result = _Jv_FindClass (name, loader); + } + break; + } + default: + // Do nothing -- bad signature. + break; + } + + if (endp) + { + // Not really the "end", but the last valid character that we + // looked at. + *endp = sig; + } + + if (! result) + return NULL; + + // Find arrays. + while (array_count-- > 0) + result = _Jv_GetArrayClass (result, loader); + return result; +} + + +jclass +_Jv_FindClassFromSignatureNoException (char *sig, java::lang::ClassLoader *loader, + char **endp) +{ + jclass klass; + + try + { + klass = _Jv_FindClassFromSignature(sig, loader, endp); + } + catch (java::lang::NoClassDefFoundError *ncdfe) + { + return NULL; + } + catch (java::lang::ClassNotFoundException *cnfe) + { + return NULL; + } + + return klass; +} + +JArray<jstring> * +JvConvertArgv (int argc, const char **argv) +{ + if (argc < 0) + argc = 0; + jobjectArray ar = JvNewObjectArray(argc, &java::lang::String::class$, NULL); + jobject *ptr = elements(ar); + jbyteArray bytes = NULL; + for (int i = 0; i < argc; i++) + { + const char *arg = argv[i]; + int len = strlen (arg); + if (bytes == NULL || bytes->length < len) + bytes = JvNewByteArray (len); + jbyte *bytePtr = elements (bytes); + // We assume jbyte == char. + memcpy (bytePtr, arg, len); + + // Now convert using the default encoding. + *ptr++ = new java::lang::String (bytes, 0, len); + } + return (JArray<jstring>*) ar; +} + +// FIXME: These variables are static so that they will be +// automatically scanned by the Boehm collector. This is needed +// because with qthreads the collector won't scan the initial stack -- +// it will only scan the qthreads stacks. + +// Command line arguments. +static JArray<jstring> *arg_vec; + +// The primary thread. +static java::lang::Thread *main_thread; + +#ifndef DISABLE_GETENV_PROPERTIES + +#define c_isspace(c) (memchr (" \t\n\r\v\f", c, 6) != NULL) + +static char * +next_property_key (char *s, size_t *length) +{ + size_t l = 0; + + JvAssert (s); + + // Skip over whitespace + while (c_isspace (*s)) + s++; + + // If we've reached the end, return NULL. Also return NULL if for + // some reason we've come across a malformed property string. + if (*s == 0 + || *s == ':' + || *s == '=') + return NULL; + + // Determine the length of the property key. + while (s[l] != 0 + && ! c_isspace (s[l]) + && s[l] != ':' + && s[l] != '=') + { + if (s[l] == '\\' + && s[l+1] != 0) + l++; + l++; + } + + *length = l; + + return s; +} + +static char * +next_property_value (char *s, size_t *length) +{ + size_t l = 0; + + JvAssert (s); + + while (c_isspace (*s)) + s++; + + if (*s == ':' + || *s == '=') + s++; + + while (c_isspace (*s)) + s++; + + // Determine the length of the property value. + while (s[l] != 0 + && ! c_isspace (s[l]) + && s[l] != ':' + && s[l] != '=') + { + if (s[l] == '\\' + && s[l+1] != 0) + l += 2; + else + l++; + } + + *length = l; + + return s; +} + +static void +process_gcj_properties () +{ + char *props = getenv("GCJ_PROPERTIES"); + + if (NULL == props) + return; + + // Later on we will write \0s into this string. It is simplest to + // just duplicate it here. + props = strdup (props); + + char *p = props; + size_t length; + size_t property_count = 0; + + // Whip through props quickly in order to count the number of + // property values. + while (p && (p = next_property_key (p, &length))) + { + // Skip to the end of the key + p += length; + + p = next_property_value (p, &length); + if (p) + p += length; + + property_count++; + } + + // Allocate an array of property value/key pairs. + _Jv_Environment_Properties = + (property_pair *) malloc (sizeof(property_pair) + * (property_count + 1)); + + // Go through the properties again, initializing _Jv_Properties + // along the way. + p = props; + property_count = 0; + while (p && (p = next_property_key (p, &length))) + { + _Jv_Environment_Properties[property_count].key = p; + _Jv_Environment_Properties[property_count].key_length = length; + + // Skip to the end of the key + p += length; + + p = next_property_value (p, &length); + + _Jv_Environment_Properties[property_count].value = p; + _Jv_Environment_Properties[property_count].value_length = length; + + if (p) + p += length; + + property_count++; + } + memset ((void *) &_Jv_Environment_Properties[property_count], + 0, sizeof (property_pair)); + + // Null terminate the strings. + for (property_pair *prop = &_Jv_Environment_Properties[0]; + prop->key != NULL; + prop++) + { + prop->key[prop->key_length] = 0; + prop->value[prop->value_length] = 0; + } +} +#endif // DISABLE_GETENV_PROPERTIES + +namespace gcj +{ + _Jv_Utf8Const *void_signature; + _Jv_Utf8Const *clinit_name; + _Jv_Utf8Const *init_name; + _Jv_Utf8Const *finit_name; + + bool runtimeInitialized = false; + + // When true, print debugging information about class loading. + bool verbose_class_flag; + + // When true, enable the bytecode verifier and BC-ABI type verification. + bool verifyClasses = true; + + // Thread stack size specified by the -Xss runtime argument. + size_t stack_size = 0; + + // Start time of the VM + jlong startTime = 0; + + // Arguments passed to the VM + JArray<jstring>* vmArgs; + + // Currently loaded classes + jint loadedClasses = 0; + + // Unloaded classes + jlong unloadedClasses = 0; +} + +// We accept all non-standard options accepted by Sun's java command, +// for compatibility with existing application launch scripts. +static jint +parse_x_arg (char* option_string) +{ + if (strlen (option_string) <= 0) + return -1; + + if (! strcmp (option_string, "int")) + { + // FIXME: this should cause the vm to never load shared objects + } + else if (! strcmp (option_string, "mixed")) + { + // FIXME: allow interpreted and native code + } + else if (! strcmp (option_string, "batch")) + { + // FIXME: disable background JIT'ing + } + else if (! strcmp (option_string, "debug")) + { + remoteDebug = true; + } +#ifdef INTERPRETER + else if (! strncmp (option_string, "runjdwp:", 8)) + { + if (strlen (option_string) > 8) + jdwpOptions = &option_string[8]; + else + { + fprintf (stderr, + "libgcj: argument required for JDWP options"); + return -1; + } + } +#endif // INTERPRETER + else if (! strncmp (option_string, "bootclasspath:", 14)) + { + // FIXME: add a parse_bootclasspath_arg function + } + else if (! strncmp (option_string, "bootclasspath/a:", 16)) + { + } + else if (! strncmp (option_string, "bootclasspath/p:", 16)) + { + } + else if (! strcmp (option_string, "check:jni")) + { + // FIXME: enable strict JNI checking + } + else if (! strcmp (option_string, "future")) + { + // FIXME: enable strict class file format checks + } + else if (! strcmp (option_string, "noclassgc")) + { + // FIXME: disable garbage collection for classes + } + else if (! strcmp (option_string, "incgc")) + { + // FIXME: incremental garbage collection + } + else if (! strncmp (option_string, "loggc:", 6)) + { + if (option_string[6] == '\0') + { + fprintf (stderr, + "libgcj: filename argument expected for loggc option\n"); + return -1; + } + // FIXME: set gc logging filename + } + else if (! strncmp (option_string, "ms", 2)) + { + // FIXME: ignore this option until PR 20699 is fixed. + // _Jv_SetInitialHeapSize (option_string + 2); + } + else if (! strncmp (option_string, "mx", 2)) + _Jv_SetMaximumHeapSize (option_string + 2); + else if (! strcmp (option_string, "prof")) + { + // FIXME: enable profiling of program running in vm + } + else if (! strncmp (option_string, "runhprof:", 9)) + { + // FIXME: enable specific type of vm profiling. add a + // parse_runhprof_arg function + } + else if (! strcmp (option_string, "rs")) + { + // FIXME: reduced system signal usage. disable thread dumps, + // only terminate in response to user-initiated calls, + // e.g. System.exit() + } + else if (! strncmp (option_string, "ss", 2)) + { + _Jv_SetStackSize (option_string + 2); + } + else if (! strcmp (option_string, "X:+UseAltSigs")) + { + // FIXME: use signals other than SIGUSR1 and SIGUSR2 + } + else if (! strcmp (option_string, "share:off")) + { + // FIXME: don't share class data + } + else if (! strcmp (option_string, "share:auto")) + { + // FIXME: share class data where possible + } + else if (! strcmp (option_string, "share:on")) + { + // FIXME: fail if impossible to share class data + } + else + { + // Unrecognized. + return -1; + } + return 0; +} + +static jint +parse_verbose_args (char* option_string, + bool ignore_unrecognized) +{ + size_t len = sizeof ("-verbose") - 1; + + if (strlen (option_string) < len) + return -1; + + if (option_string[len] == ':' + && option_string[len + 1] != '\0') + { + char* verbose_args = option_string + len + 1; + + do + { + if (! strncmp (verbose_args, + "gc", sizeof ("gc") - 1)) + { + if (verbose_args[sizeof ("gc") - 1] == '\0' + || verbose_args[sizeof ("gc") - 1] == ',') + { + // FIXME: we should add functions to boehm-gc that + // toggle GC_print_stats, GC_PRINT_ADDRESS_MAP and + // GC_print_back_height. + verbose_args += sizeof ("gc") - 1; + } + else + { + verbose_arg_err: + fprintf (stderr, "libgcj: unknown verbose option: %s\n", + option_string); + return -1; + } + } + else if (! strncmp (verbose_args, + "class", + sizeof ("class") - 1)) + { + if (verbose_args[sizeof ("class") - 1] == '\0' + || verbose_args[sizeof ("class") - 1] == ',') + { + gcj::verbose_class_flag = true; + verbose_args += sizeof ("class") - 1; + } + else + goto verbose_arg_err; + } + else if (! strncmp (verbose_args, "jni", + sizeof ("jni") - 1)) + { + if (verbose_args[sizeof ("jni") - 1] == '\0' + || verbose_args[sizeof ("jni") - 1] == ',') + { + // FIXME: enable JNI messages. + verbose_args += sizeof ("jni") - 1; + } + else + goto verbose_arg_err; + } + else if (ignore_unrecognized + && verbose_args[0] == 'X') + { + // ignore unrecognized non-standard verbose option + while (verbose_args[0] != '\0' + && verbose_args[0] != ',') + verbose_args++; + } + else if (verbose_args[0] == ',') + { + verbose_args++; + } + else + goto verbose_arg_err; + + if (verbose_args[0] == ',') + verbose_args++; + } + while (verbose_args[0] != '\0'); + } + else if (option_string[len] == 'g' + && option_string[len + 1] == 'c' + && option_string[len + 2] == '\0') + { + // FIXME: we should add functions to boehm-gc that + // toggle GC_print_stats, GC_PRINT_ADDRESS_MAP and + // GC_print_back_height. + return 0; + } + else if (option_string[len] == '\0') + { + gcj::verbose_class_flag = true; + return 0; + } + else + { + // unrecognized option beginning with -verbose + return -1; + } + return 0; +} + +#ifdef INTERPRETER +// This function loads the agent functions for JVMTI from the library indicated +// by name. It returns a negative value on failure, the value of which +// indicates where ltdl failed, it also prints an error message. +static jint +load_jvmti_agent (const char *name) +{ +#ifdef USE_LTDL + if (lt_dlinit ()) + { + fprintf (stderr, + "libgcj: Error in ltdl init while loading agent library.\n"); + return -1; + } + + lt_dlhandle lib = lt_dlopenext (name); + if (!lib) + { + fprintf (stderr, + "libgcj: Error opening agent library.\n"); + return -2; + } + + if (lib) + { + jvmti_agentonload + = (jvmti_agent_onload_func *) lt_dlsym (lib, "Agent_OnLoad"); + + if (!jvmti_agentonload) + { + fprintf (stderr, + "libgcj: Error finding agent function in library %s.\n", + name); + lt_dlclose (lib); + lib = NULL; + return -4; + } + else + { + jvmti_agentonunload + = (jvmti_agent_onunload_func *) lt_dlsym (lib, "Agent_OnUnload"); + + return 0; + } + } + else + { + fprintf (stderr, "libgcj: Library %s not found in library path.\n", name); + return -3; + } + +#endif /* USE_LTDL */ + + // If LTDL cannot be used, return an error code indicating this. + return -99; +} +#endif // INTERPRETER + +static jint +parse_init_args (JvVMInitArgs* vm_args) +{ + // if _Jv_Compiler_Properties is non-NULL then it needs to be + // re-allocated dynamically. + if (_Jv_Compiler_Properties) + { + const char** props = _Jv_Compiler_Properties; + _Jv_Compiler_Properties = NULL; + + for (int i = 0; props[i]; i++) + { + _Jv_Compiler_Properties = (const char**) _Jv_Realloc + (_Jv_Compiler_Properties, + (_Jv_Properties_Count + 1) * sizeof (const char*)); + _Jv_Compiler_Properties[_Jv_Properties_Count++] = props[i]; + } + } + + if (vm_args == NULL) + return 0; + + for (int i = 0; i < vm_args->nOptions; ++i) + { + char* option_string = vm_args->options[i].optionString; + + if (! strcmp (option_string, "vfprintf") + || ! strcmp (option_string, "exit") + || ! strcmp (option_string, "abort")) + { + // FIXME: we are required to recognize these, but for + // now we don't handle them in any way. + continue; + } + else if (! strncmp (option_string, + "-verbose", sizeof ("-verbose") - 1)) + { + jint result = parse_verbose_args (option_string, + vm_args->ignoreUnrecognized); + if (result < 0) + return result; + } + else if (! strncmp (option_string, "-D", 2)) + { + _Jv_Compiler_Properties = (const char**) _Jv_Realloc + (_Jv_Compiler_Properties, + (_Jv_Properties_Count + 1) * sizeof (char*)); + + _Jv_Compiler_Properties[_Jv_Properties_Count++] = + strdup (option_string + 2); + + continue; + } +#ifdef INTERPRETER + else if (! strncmp (option_string, "-agentlib", sizeof ("-agentlib") - 1)) + { + char *strPtr; + + if (strlen(option_string) > (sizeof ("-agentlib:") - 1)) + strPtr = &option_string[sizeof ("-agentlib:") - 1]; + else + { + fprintf (stderr, + "libgcj: Malformed agentlib argument %s: expected lib name\n", + option_string); + return -1; + } + + // These are optional arguments to pass to the agent library. + jvmti_agent_opts = strchr (strPtr, '='); + + if (! strncmp (strPtr, "jdwp", 4)) + { + // We want to run JDWP here so set the correct variables. + remoteDebug = true; + jdwpOptions = ++jvmti_agent_opts; + } + else + { + jint nameLength; + + if (jvmti_agent_opts == NULL) + nameLength = strlen (strPtr); + else + { + nameLength = jvmti_agent_opts - strPtr; + jvmti_agent_opts++; + } + + char lib_name[nameLength + 3 + 1]; + strcpy (lib_name, "lib"); + strncat (lib_name, strPtr, nameLength); + + jint result = load_jvmti_agent (lib_name); + + if (result < 0) + { + return -1; + } + + // Mark JVMTI active + JVMTI::enabled = true; + } + + continue; + } + else if (! strncmp (option_string, "-agentpath:", + sizeof ("-agentpath:") - 1)) + { + char *strPtr; + + if (strlen(option_string) > 10) + strPtr = &option_string[10]; + else + { + fprintf (stderr, + "libgcj: Malformed agentlib argument %s: expected lib path\n", + option_string); + return -1; + } + + // These are optional arguments to pass to the agent library. + jvmti_agent_opts = strchr (strPtr, '='); + + jint nameLength; + + if (jvmti_agent_opts == NULL) + nameLength = strlen (strPtr); + else + { + nameLength = jvmti_agent_opts - strPtr; + jvmti_agent_opts++; + } + + char lib_name[nameLength + 3 + 1]; + strcpy (lib_name, "lib"); + strncat (lib_name, strPtr, nameLength); + jint result = load_jvmti_agent (strPtr); + + if (result < 0) + { + return -1; + } + + // Mark JVMTI active + JVMTI::enabled = true; + continue; + } +#endif // INTERPRETER + else + { + int r = -1; + if (option_string[0] == '_') + r = parse_x_arg (option_string + 1); + else if (! strncmp (option_string, "-X", 2)) + r = parse_x_arg (option_string + 2); + + if (r == -1 && ! vm_args->ignoreUnrecognized) + { + fprintf (stderr, "libgcj: unknown option: %s\n", option_string); + return -1; + } + } + } + return 0; +} + +jint +_Jv_CreateJavaVM (JvVMInitArgs* vm_args) +{ + using namespace gcj; + + if (runtimeInitialized) + return -1; + + runtimeInitialized = true; + startTime = _Jv_platform_gettimeofday(); + + jint result = parse_init_args (vm_args); + if (result < 0) + return -1; + + PROCESS_GCJ_PROPERTIES; + + /* Threads must be initialized before the GC, so that it inherits the + signal mask. */ + _Jv_InitThreads (); + _Jv_InitGC (); + _Jv_InitializeSyncMutex (); + +#ifdef INTERPRETER + _Jv_InitInterpreter (); +#endif + +#ifdef HANDLE_SEGV + INIT_SEGV; +#endif + +#ifdef HANDLE_FPE + INIT_FPE; +#endif + + /* Initialize Utf8 constants declared in jvm.h. */ + void_signature = _Jv_makeUtf8Const ("()V", 3); + clinit_name = _Jv_makeUtf8Const ("<clinit>", 8); + init_name = _Jv_makeUtf8Const ("<init>", 6); + finit_name = _Jv_makeUtf8Const ("finit$", 6); + + /* Initialize built-in classes to represent primitive TYPEs. */ + _Jv_InitPrimClass (&_Jv_byteClass, "byte", 'B', 1); + _Jv_InitPrimClass (&_Jv_shortClass, "short", 'S', 2); + _Jv_InitPrimClass (&_Jv_intClass, "int", 'I', 4); + _Jv_InitPrimClass (&_Jv_longClass, "long", 'J', 8); + _Jv_InitPrimClass (&_Jv_booleanClass, "boolean", 'Z', 1); + _Jv_InitPrimClass (&_Jv_charClass, "char", 'C', 2); + _Jv_InitPrimClass (&_Jv_floatClass, "float", 'F', 4); + _Jv_InitPrimClass (&_Jv_doubleClass, "double", 'D', 8); + _Jv_InitPrimClass (&_Jv_voidClass, "void", 'V', 0); + + // We have to initialize this fairly early, to avoid circular class + // initialization. In particular we want to start the + // initialization of ClassLoader before we start the initialization + // of VMClassLoader. + _Jv_InitClass (&java::lang::ClassLoader::class$); + + // Set up the system class loader and the bootstrap class loader. + gnu::gcj::runtime::ExtensionClassLoader::initialize(); + java::lang::VMClassLoader::initialize(JvNewStringLatin1(TOOLEXECLIBDIR)); + + _Jv_RegisterBootstrapPackages(); + + no_memory = new java::lang::OutOfMemoryError; + +#ifdef USE_LTDL + LTDL_SET_PRELOADED_SYMBOLS (); +#endif + + _Jv_platform_initialize (); + + _Jv_JNI_Init (); + +#ifdef INTERPRETER + _Jv_JVMTI_Init (); +#endif + + _Jv_GCInitializeFinalizers (&::gnu::gcj::runtime::FinalizerThread::finalizerReady); + + // Start the GC finalizer thread. A VirtualMachineError can be + // thrown by the runtime if, say, threads aren't available. + try + { + using namespace gnu::gcj::runtime; + FinalizerThread *ft = new FinalizerThread (); + ft->start (); + } + catch (java::lang::VirtualMachineError *ignore) + { + } + + runtimeInitialized = true; + + return 0; +} + +void +_Jv_RunMain (JvVMInitArgs *vm_args, jclass klass, const char *name, int argc, + const char **argv, bool is_jar) +{ +#ifndef DISABLE_MAIN_ARGS + _Jv_SetArgs (argc, argv); +#endif + + java::lang::Runtime *runtime = NULL; + + try + { + if (_Jv_CreateJavaVM (vm_args) < 0) + { + fprintf (stderr, "libgcj: couldn't create virtual machine\n"); + exit (1); + } + + if (vm_args == NULL) + gcj::vmArgs = JvConvertArgv(0, NULL); + else + { + const char* vmArgs[vm_args->nOptions]; + const char** vmPtr = vmArgs; + struct _Jv_VMOption* optionPtr = vm_args->options; + for (int i = 0; i < vm_args->nOptions; ++i) + *vmPtr++ = (*optionPtr++).optionString; + gcj::vmArgs = JvConvertArgv(vm_args->nOptions, vmArgs); + } + + // Get the Runtime here. We want to initialize it before searching + // for `main'; that way it will be set up if `main' is a JNI method. + runtime = java::lang::Runtime::getRuntime (); + +#ifdef DISABLE_MAIN_ARGS + arg_vec = JvConvertArgv (0, 0); +#else + arg_vec = JvConvertArgv (argc - 1, argv + 1); +#endif + + using namespace gnu::java::lang; + if (klass) + main_thread = new MainThread (klass, arg_vec); + else + main_thread = new MainThread (JvNewStringUTF (name), + arg_vec, is_jar); + _Jv_AttachCurrentThread (main_thread); + +#ifdef INTERPRETER + // Start JVMTI if an agent function has been found. + if (jvmti_agentonload) + (*jvmti_agentonload) (_Jv_GetJavaVM (), jvmti_agent_opts, NULL); + + // Start JDWP + if (remoteDebug) + { + using namespace gnu::classpath::jdwp; + VMVirtualMachine::initialize (); + Jdwp *jdwp = new Jdwp (); + jdwp->setDaemon (true); + jdwp->configure (JvNewStringLatin1 (jdwpOptions)); + jdwp->start (); + + // Wait for JDWP to initialize and start + jdwp->join (); + } + // Send VMInit + if (JVMTI_REQUESTED_EVENT (VMInit)) + _Jv_JVMTI_PostEvent (JVMTI_EVENT_VM_INIT, main_thread); +#endif // INTERPRETER + } + catch (java::lang::Throwable *t) + { + java::lang::System::err->println (JvNewStringLatin1 + ("Exception during runtime initialization")); + t->printStackTrace(); + if (runtime) + java::lang::Runtime::exitNoChecksAccessor (1); + // In case the runtime creation failed. + ::exit (1); + } + + _Jv_ThreadRun (main_thread); + +#ifdef INTERPRETER + // Send VMDeath + if (JVMTI_REQUESTED_EVENT (VMDeath)) + { + java::lang::Thread *thread = java::lang::Thread::currentThread (); + JNIEnv *jni_env = _Jv_GetCurrentJNIEnv (); + _Jv_JVMTI_PostEvent (JVMTI_EVENT_VM_DEATH, thread, jni_env); + } + + // Run JVMTI AgentOnUnload if it exists and an agent is loaded. + if (jvmti_agentonunload) + (*jvmti_agentonunload) (_Jv_GetJavaVM ()); +#endif // INTERPRETER + + // If we got here then something went wrong, as MainThread is not + // supposed to terminate. + ::exit (1); +} + +void +_Jv_RunMain (jclass klass, const char *name, int argc, const char **argv, + bool is_jar) +{ + _Jv_RunMain (NULL, klass, name, argc, argv, is_jar); +} + +void +JvRunMain (jclass klass, int argc, const char **argv) +{ + _Jv_RunMain (klass, NULL, argc, argv, false); +} + +void +JvRunMainName (const char *name, int argc, const char **argv) +{ + _Jv_RunMain (NULL, name, argc, argv, false); +} + + + +// Parse a string and return a heap size. +static size_t +parse_memory_size (const char *spec) +{ + char *end; + unsigned long val = strtoul (spec, &end, 10); + if (*end == 'k' || *end == 'K') + val *= 1024; + else if (*end == 'm' || *end == 'M') + val *= 1048576; + return (size_t) val; +} + +// Set the initial heap size. This might be ignored by the GC layer. +// This must be called before _Jv_RunMain. +void +_Jv_SetInitialHeapSize (const char *arg) +{ + size_t size = parse_memory_size (arg); + _Jv_GCSetInitialHeapSize (size); +} + +// Set the maximum heap size. This might be ignored by the GC layer. +// This must be called before _Jv_RunMain. +void +_Jv_SetMaximumHeapSize (const char *arg) +{ + size_t size = parse_memory_size (arg); + _Jv_GCSetMaximumHeapSize (size); +} + +void +_Jv_SetStackSize (const char *arg) +{ + size_t size = parse_memory_size (arg); + gcj::stack_size = size; +} + +void * +_Jv_Malloc (jsize size) +{ + if (__builtin_expect (size == 0, false)) + size = 1; + void *ptr = malloc ((size_t) size); + if (__builtin_expect (ptr == NULL, false)) + throw no_memory; + return ptr; +} + +void * +_Jv_Realloc (void *ptr, jsize size) +{ + if (__builtin_expect (size == 0, false)) + size = 1; + ptr = realloc (ptr, (size_t) size); + if (__builtin_expect (ptr == NULL, false)) + throw no_memory; + return ptr; +} + +void * +_Jv_MallocUnchecked (jsize size) +{ + if (__builtin_expect (size == 0, false)) + size = 1; + return malloc ((size_t) size); +} + +void +_Jv_Free (void* ptr) +{ + return free (ptr); +} + + + +// In theory, these routines can be #ifdef'd away on machines which +// support divide overflow signals. However, we never know if some +// code might have been compiled with "-fuse-divide-subroutine", so we +// always include them in libgcj. + +jint +_Jv_divI (jint dividend, jint divisor) +{ + if (__builtin_expect (divisor == 0, false)) + { + java::lang::ArithmeticException *arithexception + = new java::lang::ArithmeticException (JvNewStringLatin1 ("/ by zero")); + throw arithexception; + } + + if (dividend == (jint) 0x80000000L && divisor == -1) + return dividend; + + return dividend / divisor; +} + +jint +_Jv_remI (jint dividend, jint divisor) +{ + if (__builtin_expect (divisor == 0, false)) + { + java::lang::ArithmeticException *arithexception + = new java::lang::ArithmeticException (JvNewStringLatin1 ("/ by zero")); + throw arithexception; + } + + if (dividend == (jint) 0x80000000L && divisor == -1) + return 0; + + return dividend % divisor; +} + +jlong +_Jv_divJ (jlong dividend, jlong divisor) +{ + if (__builtin_expect (divisor == 0, false)) + { + java::lang::ArithmeticException *arithexception + = new java::lang::ArithmeticException (JvNewStringLatin1 ("/ by zero")); + throw arithexception; + } + + if (dividend == (jlong) 0x8000000000000000LL && divisor == -1) + return dividend; + + return dividend / divisor; +} + +jlong +_Jv_remJ (jlong dividend, jlong divisor) +{ + if (__builtin_expect (divisor == 0, false)) + { + java::lang::ArithmeticException *arithexception + = new java::lang::ArithmeticException (JvNewStringLatin1 ("/ by zero")); + throw arithexception; + } + + if (dividend == (jlong) 0x8000000000000000LL && divisor == -1) + return 0; + + return dividend % divisor; +} + + + +// Return true if SELF_KLASS can access a field or method in +// OTHER_KLASS. The field or method's access flags are specified in +// FLAGS. +jboolean +_Jv_CheckAccess (jclass self_klass, jclass other_klass, jint flags) +{ + using namespace java::lang::reflect; + return ((self_klass == other_klass) + || ((flags & Modifier::PUBLIC) != 0) + || (((flags & Modifier::PROTECTED) != 0) + && _Jv_IsAssignableFromSlow (self_klass, other_klass)) + || (((flags & Modifier::PRIVATE) == 0) + && _Jv_ClassNameSamePackage (self_klass->name, + other_klass->name))); +} + +// Prepend GCJ_VERSIONED_LIBDIR to a module search path stored in a C +// char array, if the path is not already prefixed by +// GCJ_VERSIONED_LIBDIR. Return a newly JvMalloc'd char buffer. The +// result should be freed using JvFree. +char* +_Jv_PrependVersionedLibdir (char* libpath) +{ + char* retval = 0; + + if (libpath && libpath[0] != '\0') + { + if (! strncmp (libpath, + GCJ_VERSIONED_LIBDIR, + sizeof (GCJ_VERSIONED_LIBDIR) - 1)) + { + // LD_LIBRARY_PATH is already prefixed with + // GCJ_VERSIONED_LIBDIR. + retval = (char*) _Jv_Malloc (strlen (libpath) + 1); + strcpy (retval, libpath); + } + else + { + // LD_LIBRARY_PATH is not prefixed with + // GCJ_VERSIONED_LIBDIR. + char path_sep[2]; + path_sep[0] = (char) _Jv_platform_path_separator; + path_sep[1] = '\0'; + jsize total = ((sizeof (GCJ_VERSIONED_LIBDIR) - 1) + + 1 /* path separator */ + strlen (libpath) + 1); + retval = (char*) _Jv_Malloc (total); + strcpy (retval, GCJ_VERSIONED_LIBDIR); + strcat (retval, path_sep); + strcat (retval, libpath); + } + } + else + { + // LD_LIBRARY_PATH was not specified or is empty. + retval = (char*) _Jv_Malloc (sizeof (GCJ_VERSIONED_LIBDIR)); + strcpy (retval, GCJ_VERSIONED_LIBDIR); + } + + return retval; +} |