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 /*

  * Copyright 2012, 2013 SAP AG. 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.

  *

  * 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.

  *

  */

 // Implementation of LoadedLibraries and friends

 // Ultimately this just uses loadquery()

 // See:

 // http://publib.boulder.ibm.com/infocenter/pseries/v5r3/index.jsp

 //      ?topic=/com.ibm.aix.basetechref/doc/basetrf1/loadquery.htm

 #ifndef __STDC_FORMAT_MACROS

 #define __STDC_FORMAT_MACROS

 #endif

 // 'allocation.inline.hpp' triggers the inclusion of 'inttypes.h' which defines macros

 // required by the definitions in 'globalDefinitions.hpp'. But these macros in 'inttypes.h'

 // are only defined if '__STDC_FORMAT_MACROS' is defined!

 #include "memory/allocation.inline.hpp"

 #include "oops/oop.inline.hpp"

 #include "runtime/threadCritical.hpp"

 #include "utilities/debug.hpp"

 #include "utilities/ostream.hpp"

 #include "loadlib_aix.hpp"

 #include "porting_aix.hpp"

 // For loadquery()

 #include <sys/ldr.h>

 ///////////////////////////////////////////////////////////////////////////////

 // Implementation for LoadedLibraryModule

 // output debug info

 void LoadedLibraryModule::print(outputStream* os) const {

   os->print("%15.15s: text: " INTPTR_FORMAT " - " INTPTR_FORMAT

                ", data: " INTPTR_FORMAT " - " INTPTR_FORMAT " ",

       shortname, text_from, text_to, data_from, data_to);

   os->print(" %s", fullpath);

   if (strlen(membername) > 0) {

     os->print("(%s)", membername);

   }

   os->cr();

 }

 ///////////////////////////////////////////////////////////////////////////////

 // Implementation for LoadedLibraries

 // class variables

 LoadedLibraryModule LoadedLibraries::tab[MAX_MODULES];

 int LoadedLibraries::num_loaded = 0;

 // Checks whether the address p points to any of the loaded code segments.

 // If it does, returns the LoadedLibraryModule entry. If not, returns NULL.

 // static

 const LoadedLibraryModule* LoadedLibraries::find_for_text_address(const unsigned char* p) {

   if (num_loaded == 0) {

     reload();

   }

   for (int i = 0; i < num_loaded; i++) {

     if (tab[i].is_in_text(p)) {

       return &tab[i];

     }

   }

   return NULL;

 }

 // Checks whether the address p points to any of the loaded data segments.

 // If it does, returns the LoadedLibraryModule entry. If not, returns NULL.

 // static

 const LoadedLibraryModule* LoadedLibraries::find_for_data_address(const unsigned char* p) {

   if (num_loaded == 0) {

     reload();

   }

   for (int i = 0; i < num_loaded; i++) {

     if (tab[i].is_in_data(p)) {

       return &tab[i];

     }

   }

   return NULL;

 }

 // Rebuild the internal table of LoadedLibraryModule objects

 // static

 void LoadedLibraries::reload() {

   ThreadCritical cs;

   // discard old content

   num_loaded = 0;

   // Call loadquery(L_GETINFO..) to get a list of all loaded Dlls from AIX.

   size_t buf_size = 4096;

   char* loadquery_buf = AllocateHeap(buf_size, mtInternal);

   while(loadquery(L_GETINFO, loadquery_buf, buf_size) == -1) {

     if (errno == ENOMEM) {

       buf_size *= 2;

       loadquery_buf = ReallocateHeap(loadquery_buf, buf_size, mtInternal);

     } else {

       FreeHeap(loadquery_buf);

       // Ensure that the uintptr_t pointer is valid

       assert(errno != EFAULT, "loadquery: Invalid uintptr_t in info buffer.");

       fprintf(stderr, "loadquery failed (%d %s)", errno, strerror(errno));

       return;

     }

   }

   // Iterate over the loadquery result. For details see sys/ldr.h on AIX.

   const struct ld_info* p = (struct ld_info*) loadquery_buf;

   // Ensure we have all loaded libs.

   bool all_loaded = false;

   while(num_loaded < MAX_MODULES) {

     LoadedLibraryModule& mod = tab[num_loaded];

     mod.text_from = (const unsigned char*) p->ldinfo_textorg;

     mod.text_to   = (const unsigned char*) (((char*)p->ldinfo_textorg) + p->ldinfo_textsize);

     mod.data_from = (const unsigned char*) p->ldinfo_dataorg;

     mod.data_to   = (const unsigned char*) (((char*)p->ldinfo_dataorg) + p->ldinfo_datasize);

     sprintf(mod.fullpath, "%.*s", sizeof(mod.fullpath), p->ldinfo_filename);

     // do we have a member name as well (see ldr.h)?

     const char* p_mbr_name = p->ldinfo_filename + strlen(p->ldinfo_filename) + 1;

     if (*p_mbr_name) {

       sprintf(mod.membername, "%.*s", sizeof(mod.membername), p_mbr_name);

     } else {

       mod.membername[0] = '\0';

     }

     // fill in the short name

     const char* p_slash = strrchr(mod.fullpath, '/');

     if (p_slash) {

       sprintf(mod.shortname, "%.*s", sizeof(mod.shortname), p_slash + 1);

     } else {

       sprintf(mod.shortname, "%.*s", sizeof(mod.shortname), mod.fullpath);

     }

     num_loaded ++;

     // next entry...

     if (p->ldinfo_next) {

       p = (struct ld_info*)(((char*)p) + p->ldinfo_next);

     } else {

       all_loaded = true;

       break;

     }

   }

   FreeHeap(loadquery_buf);

   // Ensure we have all loaded libs

   assert(all_loaded, "loadquery returned more entries then expected. Please increase MAX_MODULES");

 } // end LoadedLibraries::reload()

 // output loaded libraries table

 //static

 void LoadedLibraries::print(outputStream* os) {

   for (int i = 0; i < num_loaded; i++) {

     tab[i].print(os);

   }

 }