1172 lines
28 KiB
C++
1172 lines
28 KiB
C++
// prims.cc - Code for core of runtime environment.
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/* Copyright (C) 1998, 1999, 2000, 2001 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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#include <config.h>
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#ifdef USE_WIN32_SIGNALLING
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#include <windows.h>
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#endif /* USE_WIN32_SIGNALLING */
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#ifdef USE_WINSOCK
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#undef __INSIDE_CYGWIN__
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#include <winsock.h>
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#endif /* USE_WINSOCK */
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#include <stdlib.h>
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#include <stdarg.h>
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#include <stdio.h>
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#include <string.h>
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#include <signal.h>
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#include <gcj/cni.h>
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#include <jvm.h>
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#include <java-signal.h>
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#include <java-threads.h>
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#ifdef ENABLE_JVMPI
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#include <jvmpi.h>
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#include <java/lang/ThreadGroup.h>
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#endif
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#ifndef DISABLE_GETENV_PROPERTIES
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#include <ctype.h>
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#include <java-props.h>
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#define PROCESS_GCJ_PROPERTIES process_gcj_properties()
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#else
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#define PROCESS_GCJ_PROPERTIES
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#endif // DISABLE_GETENV_PROPERTIES
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#include <java/lang/Class.h>
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#include <java/lang/ClassLoader.h>
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#include <java/lang/Runtime.h>
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#include <java/lang/String.h>
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#include <java/lang/Thread.h>
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#include <java/lang/ThreadGroup.h>
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#include <gnu/gcj/runtime/FirstThread.h>
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#include <java/lang/ArrayIndexOutOfBoundsException.h>
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#include <java/lang/ArithmeticException.h>
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#include <java/lang/ClassFormatError.h>
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#include <java/lang/NegativeArraySizeException.h>
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#include <java/lang/NullPointerException.h>
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#include <java/lang/OutOfMemoryError.h>
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#include <java/lang/System.h>
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#include <java/lang/reflect/Modifier.h>
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#include <java/io/PrintStream.h>
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#include <java/lang/UnsatisfiedLinkError.h>
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#ifdef USE_LTDL
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#include <ltdl.h>
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#endif
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// We allocate a single OutOfMemoryError exception which we keep
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// around for use if we run out of memory.
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static java::lang::OutOfMemoryError *no_memory;
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// Largest representable size_t.
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#define SIZE_T_MAX ((size_t) (~ (size_t) 0))
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static const char *no_properties[] = { NULL };
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// Properties set at compile time.
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const char **_Jv_Compiler_Properties = no_properties;
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// The JAR file to add to the beginning of java.class.path.
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const char *_Jv_Jar_Class_Path;
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#ifndef DISABLE_GETENV_PROPERTIES
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// Property key/value pairs.
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property_pair *_Jv_Environment_Properties;
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#endif
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// The name of this executable.
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static char * _Jv_execName;
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// Stash the argv pointer to benefit native libraries that need it.
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const char **_Jv_argv;
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int _Jv_argc;
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typedef void main_func (jobject);
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#ifdef ENABLE_JVMPI
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// Pointer to JVMPI notification functions.
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void (*_Jv_JVMPI_Notify_OBJECT_ALLOC) (JVMPI_Event *event);
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void (*_Jv_JVMPI_Notify_THREAD_START) (JVMPI_Event *event);
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void (*_Jv_JVMPI_Notify_THREAD_END) (JVMPI_Event *event);
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#endif
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extern "C" void _Jv_ThrowSignal (jthrowable) __attribute ((noreturn));
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// Just like _Jv_Throw, but fill in the stack trace first. Although
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// this is declared extern in order that its name not be mangled, it
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// is not intended to be used outside this file.
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void
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_Jv_ThrowSignal (jthrowable throwable)
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{
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throwable->fillInStackTrace ();
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throw throwable;
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}
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#ifdef HANDLE_SEGV
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static java::lang::NullPointerException *nullp;
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SIGNAL_HANDLER (catch_segv)
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{
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MAKE_THROW_FRAME (nullp);
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_Jv_ThrowSignal (nullp);
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}
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#endif
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static java::lang::ArithmeticException *arithexception;
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#ifdef HANDLE_FPE
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SIGNAL_HANDLER (catch_fpe)
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{
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#ifdef HANDLE_DIVIDE_OVERFLOW
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HANDLE_DIVIDE_OVERFLOW;
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#else
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MAKE_THROW_FRAME (arithexception);
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#endif
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_Jv_ThrowSignal (arithexception);
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}
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#endif
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jboolean
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_Jv_equalUtf8Consts (Utf8Const* a, Utf8Const *b)
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{
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int len;
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_Jv_ushort *aptr, *bptr;
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if (a == b)
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return true;
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if (a->hash != b->hash)
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return false;
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len = a->length;
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if (b->length != len)
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return false;
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aptr = (_Jv_ushort *)a->data;
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bptr = (_Jv_ushort *)b->data;
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len = (len + 1) >> 1;
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while (--len >= 0)
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if (*aptr++ != *bptr++)
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return false;
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return true;
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}
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/* True iff A is equal to STR.
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HASH is STR->hashCode().
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*/
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jboolean
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_Jv_equal (Utf8Const* a, jstring str, jint hash)
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{
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if (a->hash != (_Jv_ushort) hash)
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return false;
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jint len = str->length();
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jint i = 0;
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jchar *sptr = _Jv_GetStringChars (str);
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unsigned char* ptr = (unsigned char*) a->data;
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unsigned char* limit = ptr + a->length;
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for (;; i++, sptr++)
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{
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int ch = UTF8_GET (ptr, limit);
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if (i == len)
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return ch < 0;
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if (ch != *sptr)
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return false;
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}
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return true;
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}
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/* Like _Jv_equal, but stop after N characters. */
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jboolean
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_Jv_equaln (Utf8Const *a, jstring str, jint n)
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{
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jint len = str->length();
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jint i = 0;
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jchar *sptr = _Jv_GetStringChars (str);
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unsigned char* ptr = (unsigned char*) a->data;
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unsigned char* limit = ptr + a->length;
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for (; n-- > 0; i++, sptr++)
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{
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int ch = UTF8_GET (ptr, limit);
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if (i == len)
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return ch < 0;
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if (ch != *sptr)
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return false;
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}
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return true;
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}
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/* Count the number of Unicode chars encoded in a given Ut8 string. */
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int
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_Jv_strLengthUtf8(char* str, int len)
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{
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unsigned char* ptr;
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unsigned char* limit;
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int str_length;
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ptr = (unsigned char*) str;
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limit = ptr + len;
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str_length = 0;
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for (; ptr < limit; str_length++)
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{
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if (UTF8_GET (ptr, limit) < 0)
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return (-1);
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}
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return (str_length);
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}
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/* Calculate a hash value for a string encoded in Utf8 format.
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* This returns the same hash value as specified or java.lang.String.hashCode.
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*/
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static jint
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hashUtf8String (char* str, int len)
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{
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unsigned char* ptr = (unsigned char*) str;
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unsigned char* limit = ptr + len;
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jint hash = 0;
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for (; ptr < limit;)
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{
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int ch = UTF8_GET (ptr, limit);
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/* Updated specification from
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http://www.javasoft.com/docs/books/jls/clarify.html. */
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hash = (31 * hash) + ch;
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}
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return hash;
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}
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_Jv_Utf8Const *
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_Jv_makeUtf8Const (char* s, int len)
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{
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if (len < 0)
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len = strlen (s);
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Utf8Const* m = (Utf8Const*) _Jv_AllocBytes (sizeof(Utf8Const) + len + 1);
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if (! m)
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throw no_memory;
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memcpy (m->data, s, len);
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m->data[len] = 0;
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m->length = len;
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m->hash = hashUtf8String (s, len) & 0xFFFF;
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return (m);
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}
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_Jv_Utf8Const *
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_Jv_makeUtf8Const (jstring string)
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{
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jint hash = string->hashCode ();
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jint len = _Jv_GetStringUTFLength (string);
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Utf8Const* m = (Utf8Const*)
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_Jv_AllocBytes (sizeof(Utf8Const) + len + 1);
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m->hash = hash;
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m->length = len;
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_Jv_GetStringUTFRegion (string, 0, string->length (), m->data);
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m->data[len] = 0;
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return m;
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}
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#ifdef DEBUG
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void
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_Jv_Abort (const char *function, const char *file, int line,
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const char *message)
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#else
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void
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_Jv_Abort (const char *, const char *, int, const char *message)
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#endif
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{
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#ifdef DEBUG
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fprintf (stderr,
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"libgcj failure: %s\n in function %s, file %s, line %d\n",
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message, function, file, line);
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#else
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java::io::PrintStream *err = java::lang::System::err;
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err->print(JvNewStringLatin1 ("libgcj failure: "));
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err->println(JvNewStringLatin1 (message));
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err->flush();
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#endif
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abort ();
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}
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static void
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fail_on_finalization (jobject)
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{
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JvFail ("object was finalized");
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}
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void
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_Jv_GCWatch (jobject obj)
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{
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_Jv_RegisterFinalizer (obj, fail_on_finalization);
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}
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void
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_Jv_ThrowBadArrayIndex(jint bad_index)
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{
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throw new java::lang::ArrayIndexOutOfBoundsException
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(java::lang::String::valueOf (bad_index));
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}
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void
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_Jv_ThrowNullPointerException ()
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{
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throw new java::lang::NullPointerException;
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}
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// Explicitly throw a no memory exception.
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// The collector calls this when it encounters an out-of-memory condition.
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void _Jv_ThrowNoMemory()
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{
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_Jv_Throw (no_memory);
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}
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// Allocate a new object of class KLASS. SIZE is the size of the object
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// to allocate. You might think this is redundant, but it isn't; some
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// classes, such as String, aren't of fixed size.
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jobject
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_Jv_AllocObject (jclass klass, jint size)
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{
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_Jv_InitClass (klass);
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jobject obj = (jobject) _Jv_AllocObj (size, klass);
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// If this class has inherited finalize from Object, then don't
|
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// bother registering a finalizer. We know that finalize() is the
|
||
// very first method after the dummy entry. If this turns out to be
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// unreliable, a more robust implementation can be written. Such an
|
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// implementation would look for Object.finalize in Object's method
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// table at startup, and then use that information to find the
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// appropriate index in the method vector.
|
||
if (klass->vtable->get_finalizer()
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!= java::lang::Object::class$.vtable->get_finalizer())
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_Jv_RegisterFinalizer (obj, _Jv_FinalizeObject);
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||
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||
#ifdef ENABLE_JVMPI
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||
// Service JVMPI request.
|
||
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||
if (__builtin_expect (_Jv_JVMPI_Notify_OBJECT_ALLOC != 0, false))
|
||
{
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||
JVMPI_Event event;
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||
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event.event_type = JVMPI_EVENT_OBJECT_ALLOC;
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||
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
|
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// 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 ();
|
||
}
|
||
#endif
|
||
|
||
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
|
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jobject
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_Jv_AllocPtrFreeObject (jclass klass, jint size)
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{
|
||
_Jv_InitClass (klass);
|
||
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||
jobject obj = (jobject) _Jv_AllocPtrFreeObj (size, klass);
|
||
|
||
#ifdef ENABLE_JVMPI
|
||
// Service JVMPI request.
|
||
|
||
if (__builtin_expect (_Jv_JVMPI_Notify_OBJECT_ALLOC != 0, false))
|
||
{
|
||
JVMPI_Event event;
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||
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||
event.event_type = JVMPI_EVENT_OBJECT_ALLOC;
|
||
event.env_id = NULL;
|
||
event.u.obj_alloc.arena_id = 0;
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||
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;
|
||
|
||
_Jv_DisableGC ();
|
||
(*_Jv_JVMPI_Notify_OBJECT_ALLOC) (&event);
|
||
_Jv_EnableGC ();
|
||
}
|
||
#endif
|
||
|
||
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)
|
||
{
|
||
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);
|
||
size += count * sizeof (jobject);
|
||
|
||
// FIXME: second argument should be "current loader"
|
||
jclass klass = _Jv_GetArrayClass (elementClass, 0);
|
||
|
||
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 >
|
||
(SIZE_T_MAX - 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);
|
||
}
|
||
JvFail ("newarray - bad type code");
|
||
return NULL; // Placate compiler.
|
||
}
|
||
|
||
jobject
|
||
_Jv_NewMultiArray (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_NewMultiArray (element_type, dimensions - 1,
|
||
sizes + 1);
|
||
}
|
||
|
||
return result;
|
||
}
|
||
|
||
jobject
|
||
_Jv_NewMultiArray (jclass array_type, jint dimensions, ...)
|
||
{
|
||
va_list args;
|
||
jint sizes[dimensions];
|
||
va_start (args, dimensions);
|
||
for (int i = 0; i < dimensions; ++i)
|
||
{
|
||
jint size = va_arg (args, jint);
|
||
sizes[i] = size;
|
||
}
|
||
va_end (args);
|
||
|
||
return _Jv_NewMultiArray (array_type, dimensions, sizes);
|
||
}
|
||
|
||
|
||
|
||
#define DECLARE_PRIM_TYPE(NAME, SIG, LEN) \
|
||
_Jv_ArrayVTable _Jv_##NAME##VTable; \
|
||
java::lang::Class _Jv_##NAME##Class ((jobject) #NAME, \
|
||
(jbyte) SIG, (jint) LEN, \
|
||
(jobject) &_Jv_##NAME##VTable);
|
||
|
||
DECLARE_PRIM_TYPE(byte, 'B', 1);
|
||
DECLARE_PRIM_TYPE(short, 'S', 2);
|
||
DECLARE_PRIM_TYPE(int, 'I', 4);
|
||
DECLARE_PRIM_TYPE(long, 'J', 8);
|
||
DECLARE_PRIM_TYPE(boolean, 'Z', 1);
|
||
DECLARE_PRIM_TYPE(char, 'C', 2);
|
||
DECLARE_PRIM_TYPE(float, 'F', 4);
|
||
DECLARE_PRIM_TYPE(double, 'D', 8);
|
||
DECLARE_PRIM_TYPE(void, 'V', 0);
|
||
|
||
jclass
|
||
_Jv_FindClassFromSignature (char *sig, java::lang::ClassLoader *loader)
|
||
{
|
||
switch (*sig)
|
||
{
|
||
case 'B':
|
||
return JvPrimClass (byte);
|
||
case 'S':
|
||
return JvPrimClass (short);
|
||
case 'I':
|
||
return JvPrimClass (int);
|
||
case 'J':
|
||
return JvPrimClass (long);
|
||
case 'Z':
|
||
return JvPrimClass (boolean);
|
||
case 'C':
|
||
return JvPrimClass (char);
|
||
case 'F':
|
||
return JvPrimClass (float);
|
||
case 'D':
|
||
return JvPrimClass (double);
|
||
case 'V':
|
||
return JvPrimClass (void);
|
||
case 'L':
|
||
{
|
||
int i;
|
||
for (i = 1; sig[i] && sig[i] != ';'; ++i)
|
||
;
|
||
_Jv_Utf8Const *name = _Jv_makeUtf8Const (&sig[1], i - 1);
|
||
return _Jv_FindClass (name, loader);
|
||
|
||
}
|
||
case '[':
|
||
{
|
||
jclass klass = _Jv_FindClassFromSignature (&sig[1], loader);
|
||
if (! klass)
|
||
return NULL;
|
||
return _Jv_GetArrayClass (klass, loader);
|
||
}
|
||
}
|
||
|
||
return NULL; // Placate compiler.
|
||
}
|
||
|
||
|
||
|
||
JArray<jstring> *
|
||
JvConvertArgv (int argc, const char **argv)
|
||
{
|
||
if (argc < 0)
|
||
argc = 0;
|
||
jobjectArray ar = JvNewObjectArray(argc, &StringClass, NULL);
|
||
jobject* ptr = elements(ar);
|
||
for (int i = 0; i < argc; i++)
|
||
{
|
||
const char *arg = argv[i];
|
||
// FIXME - should probably use JvNewStringUTF.
|
||
*ptr++ = JvNewStringLatin1(arg, strlen(arg));
|
||
}
|
||
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 jobject arg_vec;
|
||
|
||
// The primary thread.
|
||
static java::lang::Thread *main_thread;
|
||
|
||
char *
|
||
_Jv_ThisExecutable (void)
|
||
{
|
||
return _Jv_execName;
|
||
}
|
||
|
||
void
|
||
_Jv_ThisExecutable (const char *name)
|
||
{
|
||
if (name)
|
||
{
|
||
_Jv_execName = (char *) _Jv_Malloc (strlen (name) + 1);
|
||
strcpy (_Jv_execName, name);
|
||
}
|
||
}
|
||
|
||
#ifdef USE_WIN32_SIGNALLING
|
||
|
||
extern "C" int* win32_get_restart_frame (void *);
|
||
|
||
LONG CALLBACK
|
||
win32_exception_handler (LPEXCEPTION_POINTERS e)
|
||
{
|
||
int* setjmp_buf;
|
||
if (e->ExceptionRecord->ExceptionCode == EXCEPTION_ACCESS_VIOLATION)
|
||
setjmp_buf = win32_get_restart_frame (nullp);
|
||
else if (e->ExceptionRecord->ExceptionCode == EXCEPTION_INT_DIVIDE_BY_ZERO)
|
||
setjmp_buf = win32_get_restart_frame (arithexception);
|
||
else
|
||
return EXCEPTION_CONTINUE_SEARCH;
|
||
|
||
e->ContextRecord->Ebp = setjmp_buf[0];
|
||
// FIXME: Why does i386-signal.h increment the PC here, do we need to do it?
|
||
e->ContextRecord->Eip = setjmp_buf[1];
|
||
// FIXME: Is this the stack pointer? Do we need it?
|
||
e->ContextRecord->Esp = setjmp_buf[2];
|
||
|
||
return EXCEPTION_CONTINUE_EXECUTION;
|
||
}
|
||
|
||
#endif
|
||
|
||
|
||
#ifndef DISABLE_GETENV_PROPERTIES
|
||
|
||
static char *
|
||
next_property_key (char *s, size_t *length)
|
||
{
|
||
size_t l = 0;
|
||
|
||
JvAssert (s);
|
||
|
||
// Skip over whitespace
|
||
while (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
|
||
&& ! 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 (isspace (*s))
|
||
s++;
|
||
|
||
if (*s == ':'
|
||
|| *s == '=')
|
||
s++;
|
||
|
||
while (isspace (*s))
|
||
s++;
|
||
|
||
// If we've reached the end, return NULL.
|
||
if (*s == 0)
|
||
return NULL;
|
||
|
||
// Determine the length of the property value.
|
||
while (s[l] != 0
|
||
&& ! 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");
|
||
char *p = props;
|
||
size_t length;
|
||
size_t property_count = 0;
|
||
|
||
if (NULL == props)
|
||
return;
|
||
|
||
// 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));
|
||
{
|
||
size_t i = 0;
|
||
|
||
// Null terminate the strings.
|
||
while (_Jv_Environment_Properties[i].key)
|
||
{
|
||
_Jv_Environment_Properties[i].key[_Jv_Environment_Properties[i].key_length] = 0;
|
||
_Jv_Environment_Properties[i++].value[_Jv_Environment_Properties[i].value_length] = 0;
|
||
}
|
||
}
|
||
}
|
||
#endif // DISABLE_GETENV_PROPERTIES
|
||
|
||
jint
|
||
_Jv_CreateJavaVM (void* /*vm_args*/)
|
||
{
|
||
PROCESS_GCJ_PROPERTIES;
|
||
|
||
// Turn stack trace generation off while creating exception objects.
|
||
_Jv_InitClass (&java::lang::Throwable::class$);
|
||
java::lang::Throwable::trace_enabled = 0;
|
||
|
||
INIT_SEGV;
|
||
#ifdef HANDLE_FPE
|
||
INIT_FPE;
|
||
#else
|
||
arithexception = new java::lang::ArithmeticException
|
||
(JvNewStringLatin1 ("/ by zero"));
|
||
#endif
|
||
|
||
no_memory = new java::lang::OutOfMemoryError;
|
||
|
||
java::lang::Throwable::trace_enabled = 1;
|
||
|
||
#ifdef USE_LTDL
|
||
LTDL_SET_PRELOADED_SYMBOLS ();
|
||
#endif
|
||
|
||
#ifdef USE_WINSOCK
|
||
// Initialise winsock for networking
|
||
WSADATA data;
|
||
if (WSAStartup (MAKEWORD (1, 1), &data))
|
||
MessageBox (NULL, "Error initialising winsock library.", "Error", MB_OK | MB_ICONEXCLAMATION);
|
||
#endif /* USE_WINSOCK */
|
||
|
||
#ifdef USE_WIN32_SIGNALLING
|
||
// Install exception handler
|
||
SetUnhandledExceptionFilter (win32_exception_handler);
|
||
#elif defined(HAVE_SIGACTION)
|
||
// We only want this on POSIX systems.
|
||
struct sigaction act;
|
||
act.sa_handler = SIG_IGN;
|
||
sigemptyset (&act.sa_mask);
|
||
act.sa_flags = 0;
|
||
sigaction (SIGPIPE, &act, NULL);
|
||
#else
|
||
signal (SIGPIPE, SIG_IGN);
|
||
#endif
|
||
|
||
_Jv_JNI_Init ();
|
||
|
||
return 0;
|
||
}
|
||
|
||
static void
|
||
runFirst (::java::lang::Class *klass, ::java::lang::Object *args)
|
||
{
|
||
Utf8Const* main_signature = _Jv_makeUtf8Const ("([Ljava.lang.String;)V", 22);
|
||
Utf8Const* main_name = _Jv_makeUtf8Const ("main", 4);
|
||
|
||
_Jv_Method *meth = _Jv_GetMethodLocal (klass, main_name, main_signature);
|
||
|
||
// Some checks from Java Spec section 12.1.4.
|
||
const char *msg = NULL;
|
||
if (meth == NULL)
|
||
msg = "no suitable method `main' in class";
|
||
else if (! java::lang::reflect::Modifier::isStatic(meth->accflags))
|
||
msg = "`main' must be static";
|
||
else if (! java::lang::reflect::Modifier::isPublic(meth->accflags))
|
||
msg = "`main' must be public";
|
||
if (msg != NULL)
|
||
{
|
||
fprintf (stderr, "%s\n", msg);
|
||
::exit(1);
|
||
}
|
||
|
||
#ifdef WITH_JVMPI
|
||
if (_Jv_JVMPI_Notify_THREAD_START)
|
||
{
|
||
JVMPI_Event event;
|
||
|
||
jstring thread_name = getName ();
|
||
jstring group_name = NULL, parent_name = NULL;
|
||
java::lang::ThreadGroup *group = getThreadGroup ();
|
||
|
||
if (group)
|
||
{
|
||
group_name = group->getName ();
|
||
group = group->getParent ();
|
||
|
||
if (group)
|
||
parent_name = group->getName ();
|
||
}
|
||
|
||
int thread_len = thread_name ? JvGetStringUTFLength (thread_name) : 0;
|
||
int group_len = group_name ? JvGetStringUTFLength (group_name) : 0;
|
||
int parent_len = parent_name ? JvGetStringUTFLength (parent_name) : 0;
|
||
|
||
char thread_chars[thread_len + 1];
|
||
char group_chars[group_len + 1];
|
||
char parent_chars[parent_len + 1];
|
||
|
||
if (thread_name)
|
||
JvGetStringUTFRegion (thread_name, 0,
|
||
thread_name->length(), thread_chars);
|
||
if (group_name)
|
||
JvGetStringUTFRegion (group_name, 0,
|
||
group_name->length(), group_chars);
|
||
if (parent_name)
|
||
JvGetStringUTFRegion (parent_name, 0,
|
||
parent_name->length(), parent_chars);
|
||
|
||
thread_chars[thread_len] = '\0';
|
||
group_chars[group_len] = '\0';
|
||
parent_chars[parent_len] = '\0';
|
||
|
||
event.event_type = JVMPI_EVENT_THREAD_START;
|
||
event.env_id = NULL;
|
||
event.u.thread_start.thread_name = thread_chars;
|
||
event.u.thread_start.group_name = group_chars;
|
||
event.u.thread_start.parent_name = parent_chars;
|
||
event.u.thread_start.thread_id = (jobjectID) this;
|
||
event.u.thread_start.thread_env_id = _Jv_GetCurrentJNIEnv ();
|
||
|
||
_Jv_DisableGC ();
|
||
(*_Jv_JVMPI_Notify_THREAD_START) (&event);
|
||
_Jv_EnableGC ();
|
||
}
|
||
#endif
|
||
|
||
main_func *real_main = (main_func *) meth->ncode;
|
||
(*real_main) (args);
|
||
}
|
||
|
||
void
|
||
JvRunMain (jclass klass, int argc, const char **argv)
|
||
{
|
||
_Jv_argv = argv;
|
||
_Jv_argc = argc;
|
||
|
||
_Jv_CreateJavaVM (NULL);
|
||
#ifdef HAVE_PROC_SELF_EXE
|
||
char exec_name[20];
|
||
sprintf (exec_name, "/proc/%d/exe", getpid ());
|
||
_Jv_ThisExecutable (exec_name);
|
||
#else
|
||
_Jv_ThisExecutable (argv[0]);
|
||
#endif
|
||
|
||
// 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.
|
||
java::lang::Runtime *rtime = java::lang::Runtime::getRuntime ();
|
||
|
||
main_thread = _Jv_AttachCurrentThread (JvNewStringLatin1 ("main"), NULL);
|
||
arg_vec = JvConvertArgv (argc - 1, argv + 1);
|
||
runFirst (klass, arg_vec);
|
||
_Jv_ThreadWait ();
|
||
|
||
int status = (int) java::lang::ThreadGroup::had_uncaught_exception;
|
||
|
||
rtime->_exit (status);
|
||
}
|
||
|
||
void
|
||
_Jv_RunMain (const char *name, int argc, const char **argv, bool is_jar)
|
||
{
|
||
jstring class_name;
|
||
|
||
_Jv_CreateJavaVM (NULL);
|
||
|
||
#ifdef HAVE_PROC_SELF_EXE
|
||
char exec_name[20];
|
||
sprintf (exec_name, "/proc/%d/exe", getpid ());
|
||
_Jv_ThisExecutable (exec_name);
|
||
#endif
|
||
|
||
// 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.
|
||
java::lang::Runtime *rtime = java::lang::Runtime::getRuntime ();
|
||
|
||
main_thread = _Jv_AttachCurrentThread (JvNewStringLatin1 ("main"), NULL);
|
||
|
||
if (is_jar)
|
||
{
|
||
// name specifies a jar file. We must now extract the
|
||
// Main-Class attribute from the jar's manifest file.
|
||
// This is done by gnu.gcj.runtime.FirstThread.getMain.
|
||
_Jv_Jar_Class_Path = strdup (name);
|
||
jstring jar_name = JvNewStringLatin1 (name);
|
||
// FirstThread.getMain extracts the main class name.
|
||
class_name = gnu::gcj::runtime::FirstThread::getMain (jar_name);
|
||
|
||
// We need a new ClassLoader because the classpath must be the
|
||
// jar file only. The easiest way to do this is to lose our
|
||
// reference to the previous classloader.
|
||
java::lang::ClassLoader::system = NULL;
|
||
}
|
||
else
|
||
class_name = JvNewStringLatin1 (name);
|
||
|
||
arg_vec = JvConvertArgv (argc - 1, argv + 1);
|
||
|
||
if (class_name)
|
||
{
|
||
runFirst(java::lang::Class::forName (class_name), arg_vec);
|
||
_Jv_ThreadWait ();
|
||
}
|
||
|
||
int status = (int) java::lang::ThreadGroup::had_uncaught_exception;
|
||
|
||
rtime->exit (status);
|
||
}
|
||
|
||
|
||
|
||
// Parse a string and return a heap size.
|
||
static size_t
|
||
parse_heap_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_heap_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_heap_size (arg);
|
||
_Jv_GCSetMaximumHeapSize (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))
|
||
_Jv_ThrowSignal (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))
|
||
_Jv_ThrowSignal (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))
|
||
_Jv_ThrowSignal (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))
|
||
_Jv_ThrowSignal (arithexception);
|
||
|
||
if (dividend == (jlong) 0x8000000000000000LL && divisor == -1)
|
||
return 0;
|
||
|
||
return dividend % divisor;
|
||
}
|