/*

 * Copyright (c) 2001, 2015, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

#include <stdarg.h>

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <limits.h>

#include <sys/stat.h>

#ifdef _MSC_VER

#include <direct.h>

#include <io.h>

#include <process.h>

#else

#include <unistd.h>

#endif

#include "constants.h"

#include "defines.h"

#include "bytes.h"

#include "utils.h"

#include "unpack.h"

void* must_malloc(size_t size) {

  size_t msize = size;

  #ifdef USE_MTRACE

  if (msize >= 0 && msize < sizeof(int))

    msize = sizeof(int);  // see 0xbaadf00d below

  #endif

  void* ptr = (msize > PSIZE_MAX || msize <= 0) ? null : malloc(msize);

  if (ptr != null) {

    memset(ptr, 0, size);

  } else {

    unpack_abort(ERROR_ENOMEM);

  }

  mtrace('m', ptr, size);

  return ptr;

}

void mkdirs(int oklen, char* path) {

  if (strlen(path) <= (size_t)oklen)  return;

  char dir[PATH_MAX];

  strcpy(dir, path);

  char* slash = strrchr(dir, '/');

  if (slash == 0)  return;

  *slash = 0;

  mkdirs(oklen, dir);

  MKDIR(dir);

}

#ifndef PRODUCT

#ifndef STATIC_BUILD

// use the definition in libjvm when building statically

void breakpoint() { }  // hook for debugger

int assert_failed(const char* p) {

  char message[1<<12];

  sprintf(message, "@assert failed: %s\n", p);

  fprintf(stdout, "%s", 1+message);

  breakpoint();

  unpack_abort(message);

  return 0;

}

#endif

#endif

void unpack_abort(const char* msg, unpacker* u) {

  if (msg == null)  msg = "corrupt pack file or internal error";

  if (u == null)

    u = unpacker::current();

  if (u == null) {

    fprintf(stderr, "Error: unpacker: %s\n", msg);

    ::abort();

    return;

  }

  u->abort(msg);

}

bool unpack_aborting(unpacker* u) {

  if (u == null)

    u = unpacker::current();

  if (u == null) {

    fprintf(stderr, "Error: unpacker: no current instance\n");

    ::abort();

    return true;

  }

  return u->aborting();

}

#ifdef USE_MTRACE

// Use this occasionally for detecting storage leaks in unpack.

void mtrace(char c, void* ptr, size_t size) {

  if (c == 'f')  *(int*)ptr = 0xbaadf00d;

  static FILE* mtfp;

  if (mtfp == (FILE*)-1)  return;

  if (mtfp == null) {

    if (getenv("USE_MTRACE") == null) {

      mtfp = (FILE*)-1;

      return;

    }

    char fname[1024];

    sprintf(fname, "mtr%d.txt", getpid());

    mtfp = fopen(fname, "w");

    if (mtfp == null)

      mtfp = stdout;

  }

  fprintf(mtfp, "%c %p %p\n", c, ptr, (void*)size);

}

/* # Script for processing memory traces.

   # It should report only a limited number (2) of "suspended" blocks,

   # even if a large number of archive segments are processed.

   # It should report no "leaked" blocks at all.

   nawk < mtr*.txt '

   function checkleaks(what) {

     nd = 0

     for (ptr in allocated) {

       if (allocated[ptr] == 1) {

         print NR ": " what " " ptr

         #allocated[ptr] = 0  # stop the dangle

         nd++

       }

     }

     if (nd > 0)  print NR ": count " what " " nd

   }

   /^[mfr]/ {

       ptr = $2

       a1 = ($1 == "m")? 1: 0

       a0 = 0+allocated[ptr]

       allocated[ptr] = a1

       if (a0 + a1 != 1) {

         if (a0 == 0 && a1 == 0)

           print NR ": double free " ptr

         else if (a0 == 1 && a1 == 1)

           print NR ": double malloc " ptr

         else

           print NR ": oddity " $0

       }

       next

     }

   /^s/ {

     checkleaks("suspended")

     next

   }

   {

     print NR ": unrecognized " $0

   }

   END {

     checkleaks("leaked")

   }

'

*/

#endif // USE_MTRACE