/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 * vim: set ts=4 sw=4 et tw=99 ft=cpp:
 *
 * ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is Mozilla SpiderMonkey JavaScript 1.9 code, released
 * June 30, 2010
 *
 * The Initial Developer of the Original Code is
 *   the Mozilla Corporation.
 *
 * Contributor(s):
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either of the GNU General Public License Version 2 or later (the "GPL"),
 * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */

#include "mozilla/Util.h"

#include "jstypes.h"
#include "jscntxt.h"
#include "jsgcstats.h"
#include "jsgc.h"
#include "jsxml.h"
#include "jscompartment.h"

#include "jsgcinlines.h"
#include "jsobjinlines.h"

using namespace mozilla;
using namespace js;
using namespace js::gc;

#define UL(x)       ((unsigned long)(x))
#define PERCENT(x,y)  (100.0 * (double) (x) / (double) (y))

namespace js {
namespace gc {

#if defined(JS_DUMP_CONSERVATIVE_GC_ROOTS)

void
ConservativeGCStats::dump(FILE *fp)
{
    size_t words = 0;
    for (size_t i = 0; i < ArrayLength(counter); ++i)
        words += counter[i];
   
#define ULSTAT(x)       ((unsigned long)(x))
    fprintf(fp, "CONSERVATIVE STACK SCANNING:\n");
    fprintf(fp, "      number of stack words: %lu\n", ULSTAT(words));
    fprintf(fp, "      excluded, low bit set: %lu\n", ULSTAT(counter[CGCT_LOWBITSET]));
    fprintf(fp, "        not withing a chunk: %lu\n", ULSTAT(counter[CGCT_NOTCHUNK]));
    fprintf(fp, "     not within arena range: %lu\n", ULSTAT(counter[CGCT_NOTARENA]));
    fprintf(fp, "     in another compartment: %lu\n", ULSTAT(counter[CGCT_OTHERCOMPARTMENT]));
    fprintf(fp, "       points to free arena: %lu\n", ULSTAT(counter[CGCT_FREEARENA]));
    fprintf(fp, "         excluded, not live: %lu\n", ULSTAT(counter[CGCT_NOTLIVE]));
    fprintf(fp, "            valid GC things: %lu\n", ULSTAT(counter[CGCT_VALID]));
    fprintf(fp, "      valid but not aligned: %lu\n", ULSTAT(unaligned));
#undef ULSTAT
}
#endif

} //gc

#ifdef JS_DUMP_CONSERVATIVE_GC_ROOTS
void
GCMarker::dumpConservativeRoots()
{
    if (!conservativeDumpFileName)
        return;

    FILE *fp;
    if (!strcmp(conservativeDumpFileName, "stdout")) {
        fp = stdout;
    } else if (!strcmp(conservativeDumpFileName, "stderr")) {
        fp = stderr;
    } else if (!(fp = fopen(conservativeDumpFileName, "aw"))) {
        fprintf(stderr,
                "Warning: cannot open %s to dump the conservative roots\n",
                conservativeDumpFileName);
        return;
    }

    conservativeStats.dump(fp);

    for (void **thingp = conservativeRoots.begin(); thingp != conservativeRoots.end(); ++thingp) {
        void *thing = thingp;
        fprintf(fp, "  %p: ", thing);

        switch (GetGCThingTraceKind(thing)) {
          case JSTRACE_OBJECT: {
            JSObject *obj = (JSObject *) thing;
            fprintf(fp, "object %s", obj->getClass()->name);
            break;
          }
          case JSTRACE_STRING: {
            JSString *str = (JSString *) thing;
            if (str->isLinear()) {
                char buf[50];
                PutEscapedString(buf, sizeof buf, &str->asLinear(), '"');
                fprintf(fp, "string %s", buf);
            } else {
                fprintf(fp, "rope: length %d", (int)str->length());
            }
            break;
          }
          case JSTRACE_SCRIPT: {
            fprintf(fp, "shape");
            break;
          }
          case JSTRACE_SHAPE: {
            fprintf(fp, "shape");
            break;
          }
          case JSTRACE_BASE_SHAPE: {
            fprintf(fp, "base_shape");
            break;
          }
          case JSTRACE_TYPE_OBJECT: {
            fprintf(fp, "type_object");
            break;
          }
# if JS_HAS_XML_SUPPORT
          case JSTRACE_XML: {
            JSXML *xml = (JSXML *) thing;
            fprintf(fp, "xml %u", (unsigned)xml->xml_class);
            break;
          }
# endif
        }
        fputc('\n', fp);
    }
    fputc('\n', fp);

    if (fp != stdout && fp != stderr)
        fclose(fp);
}
#endif /* JS_DUMP_CONSERVATIVE_GC_ROOTS */

} /* namespace js */