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// natThrowable.cc - Superclass for all exceptions.
/* Copyright (C) 2000 Red Hat Inc
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. */
/**
* @author Andrew Haley <aph@cygnus.com>
* @date Jan 6 2000
*/
#include <config.h>
#include <string.h>
#pragma implementation "Throwable.h"
#include <gcj/cni.h>
#include <jvm.h>
#include <java/lang/Object.h>
#include <java-threads.h>
#include <java/lang/Throwable.h>
#include <java/io/PrintStream.h>
#include <java/io/PrintWriter.h>
#include <sys/types.h>
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#ifdef HAVE_EXECINFO_H
#include <execinfo.h>
#endif
#include <name-finder.h>
/* FIXME: size of the stack trace is limited to 128 elements. It's
undoubtedly sensible to limit the stack trace, but 128 is rather
arbitrary. It may be better to configure this. */
java::lang::Throwable *
java::lang::Throwable::fillInStackTrace (void)
{
#ifdef HAVE_BACKTRACE
void *p[128];
// We subtract 1 from the number of elements because we don't want
// to include the call to fillInStackTrace in the trace.
int n = backtrace (p, 128) - 1;
// ??? Might this cause a problem if the byte array isn't aligned?
stackTrace = JvNewByteArray (n * sizeof p[0]);
memcpy (elements (stackTrace), p+1, (n * sizeof p[0]));
#endif
return this;
}
void
java::lang::Throwable::printStackTrace (java::io::PrintWriter *wr)
{
wr->println (toString ());
#ifdef HAVE_BACKTRACE
if (!stackTrace)
return;
void **p = (void **)elements (stackTrace);
int depth = stackTrace->length / sizeof p[0];
_Jv_name_finder finder (_Jv_ThisExecutable ());
for (int i = 0; i < depth; i++)
{
bool found = finder.lookup (p[i]);
wr->print (JvNewStringLatin1 (" at "));
wr->print (JvNewStringLatin1 (finder.hex));
if (found)
{
wr->print (JvNewStringLatin1 (": "));
wr->print (JvNewStringLatin1 (finder.method_name));
wr->print (JvNewStringLatin1 (" ("));
wr->print (JvNewStringLatin1 (finder.file_name));
wr->print (JvNewStringLatin1 (")"));
}
wr->println ();
}
#endif /* HAVE_BACKTRACE */
}
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