jdk8-mips64-public/hotspot: src/os/aix/vm/loadlib_aix.cpp@427b2fb1944f (annotated)

src/os/aix/vm/loadlib_aix.cpp@427b2fb1944f (annotated)

src/os/aix/vm/loadlib_aix.cpp

Wed, 31 Jan 2018 19:24:57 -0500

author: dbuck
date: Wed, 31 Jan 2018 19:24:57 -0500
changeset 9289: 427b2fb1944f
parent 0: f90c822e73f8
permissions: -rw-r--r--

8189170: Add option to disable stack overflow checking in primordial thread for use with JNI_CreateJavaJVM
Reviewed-by: dcubed

 /*
  * 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);
   }
 }

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src/os/aix/vm/loadlib_aix.cpp@427b2fb1944f (annotated)

src/os/aix/vm/loadlib_aix.cpp