100 lines
2.3 KiB
C++
100 lines
2.3 KiB
C++
// natThrowable.cc - Superclass for all exceptions.
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/* Copyright (C) 2000 Free Software Foundation, Inc
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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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/**
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* @author Andrew Haley <aph@cygnus.com>
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* @date Jan 6 2000
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*/
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#include <config.h>
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#include <string.h>
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#include <gcj/cni.h>
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#include <jvm.h>
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#include <java/lang/Object.h>
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#include <java-threads.h>
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#include <java/lang/Throwable.h>
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#include <java/lang/StackTraceElement.h>
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#include <java/io/PrintStream.h>
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#include <java/io/PrintWriter.h>
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#include <java/io/IOException.h>
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#include <sys/types.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <unistd.h>
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#ifdef HAVE_EXECINFO_H
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#include <execinfo.h>
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#endif
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#include <name-finder.h>
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/* FIXME: size of the stack trace is limited to 128 elements. It's
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undoubtedly sensible to limit the stack trace, but 128 is rather
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arbitrary. It may be better to configure this. */
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java::lang::Throwable *
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java::lang::Throwable::fillInStackTrace (void)
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{
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if (! trace_enabled)
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return this;
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#if defined (HAVE_BACKTRACE)
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void *p[128];
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// We subtract 1 from the number of elements because we don't want
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// to include the call to fillInStackTrace in the trace.
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int n = backtrace (p, 128) - 1;
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if (n > 0)
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{
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// We copy the array below to deal with alignment issues.
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stackTraceBytes = JvNewByteArray (n * sizeof p[0]);
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memcpy (elements (stackTraceBytes), p+1, (n * sizeof p[0]));
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}
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#endif
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return this;
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}
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JArray<java::lang::StackTraceElement*> *
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java::lang::Throwable::getStackTrace0 ()
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{
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#ifdef HAVE_BACKTRACE
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if (!stackTraceBytes)
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return NULL;
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int depth = stackTraceBytes->length / sizeof (void *);
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void *p[depth];
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// This memcpy is esential; it ensures that the array of void* is
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// correctly aligned.
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memcpy (p, elements (stackTraceBytes), sizeof p);
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JArray<java::lang::StackTraceElement*> *result;
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java::lang::StackTraceElement** el;
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result = reinterpret_cast <JArray<java::lang::StackTraceElement *>*>
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(JvNewObjectArray (depth, &java::lang::StackTraceElement::class$, NULL));
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el = elements (result);
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_Jv_name_finder finder (_Jv_ThisExecutable ());
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for (int i = 0; i < depth; i++)
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el[i] = finder.lookup (p[i]);
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return result;
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#else
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return NULL;
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#endif /* HAVE_BACKTRACE */
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}
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