jdk8-mips64-public/hotspot: src/os_cpu/solaris_sparc/vm/vm_version_solaris

src/os_cpu/solaris_sparc/vm/vm_version_solaris_sparc.cpp@3b5410755ebd (annotated)

src/os_cpu/solaris_sparc/vm/vm_version_solaris_sparc.cpp

Tue, 25 Jul 2017 10:38:28 -0400

author: shshahma
date: Tue, 25 Jul 2017 10:38:28 -0400
changeset 8880: 3b5410755ebd
parent 8732: ef91cb539697
child 9041: 95a08233f46c
permissions: -rw-r--r--

8177958: Possible uninitialized char* in vm_version_solaris_sparc.cpp
Reviewed-by: kvn, shade

 /*
  * Copyright (c) 2006, 2014, 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.
  *
  * 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 "precompiled.hpp"
 #include "runtime/os.hpp"
 #include "vm_version_sparc.hpp"
 #include <sys/auxv.h>
 #include <sys/auxv_SPARC.h>
 #include <sys/systeminfo.h>
 #include <kstat.h>
 #include <picl.h>
 #include <dlfcn.h>
 #include <link.h>
 extern "C" static int PICL_visit_cpu_helper(picl_nodehdl_t nodeh, void *result);
 // Functions from the library we need (signatures should match those in picl.h)
 extern "C" {
   typedef int (*picl_initialize_func_t)(void);
   typedef int (*picl_shutdown_func_t)(void);
   typedef int (*picl_get_root_func_t)(picl_nodehdl_t *nodehandle);
   typedef int (*picl_walk_tree_by_class_func_t)(picl_nodehdl_t rooth,
       const char *classname, void *c_args,
       int (*callback_fn)(picl_nodehdl_t hdl, void *args));
   typedef int (*picl_get_prop_by_name_func_t)(picl_nodehdl_t nodeh, const char *nm,
       picl_prophdl_t *ph);
   typedef int (*picl_get_propval_func_t)(picl_prophdl_t proph, void *valbuf, size_t sz);
   typedef int (*picl_get_propinfo_func_t)(picl_prophdl_t proph, picl_propinfo_t *pi);
 }
 class PICL {
   // Pointers to functions in the library
   picl_initialize_func_t _picl_initialize;
   picl_shutdown_func_t _picl_shutdown;
   picl_get_root_func_t _picl_get_root;
   picl_walk_tree_by_class_func_t _picl_walk_tree_by_class;
   picl_get_prop_by_name_func_t _picl_get_prop_by_name;
   picl_get_propval_func_t _picl_get_propval;
   picl_get_propinfo_func_t _picl_get_propinfo;
   // Handle to the library that is returned by dlopen
   void *_dl_handle;
   bool open_library();
   void close_library();
   template<typename FuncType> bool bind(FuncType& func, const char* name);
   bool bind_library_functions();
   // Get a value of the integer property. The value in the tree can be either 32 or 64 bit
   // depending on the platform. The result is converted to int.
   int get_int_property(picl_nodehdl_t nodeh, const char* name, int* result) {
     picl_propinfo_t pinfo;
     picl_prophdl_t proph;
     if (_picl_get_prop_by_name(nodeh, name, &proph) != PICL_SUCCESS ||
         _picl_get_propinfo(proph, &pinfo) != PICL_SUCCESS) {
       return PICL_FAILURE;
     }
     if (pinfo.type != PICL_PTYPE_INT && pinfo.type != PICL_PTYPE_UNSIGNED_INT) {
       assert(false, "Invalid property type");
       return PICL_FAILURE;
     }
     if (pinfo.size == sizeof(int64_t)) {
       int64_t val;
       if (_picl_get_propval(proph, &val, sizeof(int64_t)) != PICL_SUCCESS) {
         return PICL_FAILURE;
       }
       *result = static_cast<int>(val);
     } else if (pinfo.size == sizeof(int32_t)) {
       int32_t val;
       if (_picl_get_propval(proph, &val, sizeof(int32_t)) != PICL_SUCCESS) {
         return PICL_FAILURE;
       }
       *result = static_cast<int>(val);
     } else {
       assert(false, "Unexpected integer property size");
       return PICL_FAILURE;
     }
     return PICL_SUCCESS;
   }
   // Visitor and a state machine that visits integer properties and verifies that the
   // values are the same. Stores the unique value observed.
   class UniqueValueVisitor {
     PICL *_picl;
     enum {
       INITIAL,        // Start state, no assignments happened
       ASSIGNED,       // Assigned a value
       INCONSISTENT    // Inconsistent value seen
     } _state;
     int _value;
   public:
     UniqueValueVisitor(PICL* picl) : _picl(picl), _state(INITIAL) { }
     int value() {
       assert(_state == ASSIGNED, "Precondition");
       return _value;
     }
     void set_value(int value) {
       assert(_state == INITIAL, "Precondition");
       _value = value;
       _state = ASSIGNED;
     }
     bool is_initial()       { return _state == INITIAL;      }
     bool is_assigned()      { return _state == ASSIGNED;     }
     bool is_inconsistent()  { return _state == INCONSISTENT; }
     void set_inconsistent() { _state = INCONSISTENT;         }
     bool visit(picl_nodehdl_t nodeh, const char* name) {
       assert(!is_inconsistent(), "Precondition");
       int curr;
       if (_picl->get_int_property(nodeh, name, &curr) == PICL_SUCCESS) {
         if (!is_assigned()) { // first iteration
           set_value(curr);
         } else if (curr != value()) { // following iterations
           set_inconsistent();
         }
         return true;
       }
       return false;
     }
   };
   class CPUVisitor {
     UniqueValueVisitor _l1_visitor;
     UniqueValueVisitor _l2_visitor;
     int _limit; // number of times visit() can be run
   public:
     CPUVisitor(PICL *picl, int limit) : _l1_visitor(picl), _l2_visitor(picl), _limit(limit) {}
     static int visit(picl_nodehdl_t nodeh, void *arg) {
       CPUVisitor *cpu_visitor = static_cast<CPUVisitor*>(arg);
       UniqueValueVisitor* l1_visitor = cpu_visitor->l1_visitor();
       UniqueValueVisitor* l2_visitor = cpu_visitor->l2_visitor();
       if (!l1_visitor->is_inconsistent()) {
         l1_visitor->visit(nodeh, "l1-dcache-line-size");
       }
       static const char* l2_data_cache_line_property_name = NULL;
       // On the first visit determine the name of the l2 cache line size property and memoize it.
       if (l2_data_cache_line_property_name == NULL) {
         assert(!l2_visitor->is_inconsistent(), "First iteration cannot be inconsistent");
         l2_data_cache_line_property_name = "l2-cache-line-size";
         if (!l2_visitor->visit(nodeh, l2_data_cache_line_property_name)) {
           l2_data_cache_line_property_name = "l2-dcache-line-size";
           l2_visitor->visit(nodeh, l2_data_cache_line_property_name);
         }
       } else {
         if (!l2_visitor->is_inconsistent()) {
           l2_visitor->visit(nodeh, l2_data_cache_line_property_name);
         }
       }
       if (l1_visitor->is_inconsistent() && l2_visitor->is_inconsistent()) {
         return PICL_WALK_TERMINATE;
       }
       cpu_visitor->_limit--;
       if (cpu_visitor->_limit <= 0) {
         return PICL_WALK_TERMINATE;
       }
       return PICL_WALK_CONTINUE;
     }
     UniqueValueVisitor* l1_visitor() { return &_l1_visitor; }
     UniqueValueVisitor* l2_visitor() { return &_l2_visitor; }
   };
   int _L1_data_cache_line_size;
   int _L2_data_cache_line_size;
 public:
   static int visit_cpu(picl_nodehdl_t nodeh, void *state) {
     return CPUVisitor::visit(nodeh, state);
   }
   PICL(bool is_fujitsu, bool is_sun4v) : _L1_data_cache_line_size(0), _L2_data_cache_line_size(0), _dl_handle(NULL) {
     if (!open_library()) {
       return;
     }
     if (_picl_initialize() == PICL_SUCCESS) {
       picl_nodehdl_t rooth;
       if (_picl_get_root(&rooth) == PICL_SUCCESS) {
         const char* cpu_class = "cpu";
         // If it's a Fujitsu machine, it's a "core"
         if (is_fujitsu) {
           cpu_class = "core";
         }
         CPUVisitor cpu_visitor(this, (is_sun4v && !is_fujitsu) ? 1 : os::processor_count());
         _picl_walk_tree_by_class(rooth, cpu_class, &cpu_visitor, PICL_visit_cpu_helper);
         if (cpu_visitor.l1_visitor()->is_assigned()) { // Is there a value?
           _L1_data_cache_line_size = cpu_visitor.l1_visitor()->value();
         }
         if (cpu_visitor.l2_visitor()->is_assigned()) {
           _L2_data_cache_line_size = cpu_visitor.l2_visitor()->value();
         }
       }
       _picl_shutdown();
     }
     close_library();
   }
   unsigned int L1_data_cache_line_size() const { return _L1_data_cache_line_size; }
   unsigned int L2_data_cache_line_size() const { return _L2_data_cache_line_size; }
 };
 extern "C" static int PICL_visit_cpu_helper(picl_nodehdl_t nodeh, void *result) {
   return PICL::visit_cpu(nodeh, result);
 }
 template<typename FuncType>
 bool PICL::bind(FuncType& func, const char* name) {
   func = reinterpret_cast<FuncType>(dlsym(_dl_handle, name));
   return func != NULL;
 }
 bool PICL::bind_library_functions() {
   assert(_dl_handle != NULL, "library should be open");
   return bind(_picl_initialize,         "picl_initialize"        ) &&
          bind(_picl_shutdown,           "picl_shutdown"          ) &&
          bind(_picl_get_root,           "picl_get_root"          ) &&
          bind(_picl_walk_tree_by_class, "picl_walk_tree_by_class") &&
          bind(_picl_get_prop_by_name,   "picl_get_prop_by_name"  ) &&
          bind(_picl_get_propval,        "picl_get_propval"       ) &&
          bind(_picl_get_propinfo,       "picl_get_propinfo"      );
 }
 bool PICL::open_library() {
   _dl_handle = dlopen("libpicl.so.1", RTLD_LAZY);
   if (_dl_handle == NULL) {
     return false;
   }
   if (!bind_library_functions()) {
     assert(false, "unexpected PICL API change");
     close_library();
     return false;
   }
   return true;
 }
 void PICL::close_library() {
   assert(_dl_handle != NULL, "library should be open");
   dlclose(_dl_handle);
   _dl_handle = NULL;
 }
 // We need to keep these here as long as we have to build on Solaris
 // versions before 10.
 #ifndef SI_ARCHITECTURE_32
 #define SI_ARCHITECTURE_32      516     /* basic 32-bit SI_ARCHITECTURE */
 #endif
 #ifndef SI_ARCHITECTURE_64
 #define SI_ARCHITECTURE_64      517     /* basic 64-bit SI_ARCHITECTURE */
 #endif
 #ifndef SI_CPUBRAND
 #define SI_CPUBRAND             523     /* return cpu brand string */
 #endif
 class Sysinfo {
   char* _string;
 public:
   Sysinfo(int si) : _string(NULL) {
     char   tmp;
     size_t bufsize = sysinfo(si, &tmp, 1);
     if (bufsize != -1) {
       char* buf = (char*) os::malloc(bufsize, mtInternal);
       if (buf != NULL) {
         if (sysinfo(si, buf, bufsize) == bufsize) {
           _string = buf;
         } else {
           os::free(buf);
         }
       }
      }
    }
   ~Sysinfo() {
     if (_string != NULL) {
       os::free(_string);
     }
   }
   const char* value() const {
     return _string;
   }
   bool valid() const {
     return _string != NULL;
   }
   bool match(const char* s) const {
     return valid() ? strcmp(_string, s) == 0 : false;
   }
   bool match_substring(const char* s) const {
     return valid() ? strstr(_string, s) != NULL : false;
   }
 };
 class Sysconf {
   int _value;
 public:
   Sysconf(int sc) : _value(-1) {
     _value = sysconf(sc);
   }
   bool valid() const {
     return _value != -1;
   }
   int value() const {
     return _value;
   }
 };
 #ifndef _SC_DCACHE_LINESZ
 #define _SC_DCACHE_LINESZ       508     /* Data cache line size */
 #endif
 #ifndef _SC_L2CACHE_LINESZ
 #define _SC_L2CACHE_LINESZ      527     /* Size of L2 cache line */
 #endif
 int VM_Version::platform_features(int features) {
   assert(os::Solaris::supports_getisax(), "getisax() must be available");
   // Check 32-bit architecture.
   if (Sysinfo(SI_ARCHITECTURE_32).match("sparc")) {
     features |= v8_instructions_m;
   }
   // Check 64-bit architecture.
   if (Sysinfo(SI_ARCHITECTURE_64).match("sparcv9")) {
     features |= generic_v9_m;
   }
   // Extract valid instruction set extensions.
   uint_t avs[2];
   uint_t avn = os::Solaris::getisax(avs, 2);
   assert(avn <= 2, "should return two or less av's");
   uint_t av = avs[0];
 #ifndef PRODUCT
   if (PrintMiscellaneous && Verbose) {
     tty->print("getisax(2) returned: " PTR32_FORMAT, av);
     if (avn > 1) {
       tty->print(", " PTR32_FORMAT, avs[1]);
     }
     tty->cr();
   }
 #endif
   if (av & AV_SPARC_MUL32)  features |= hardware_mul32_m;
   if (av & AV_SPARC_DIV32)  features |= hardware_div32_m;
   if (av & AV_SPARC_FSMULD) features |= hardware_fsmuld_m;
   if (av & AV_SPARC_V8PLUS) features |= v9_instructions_m;
   if (av & AV_SPARC_POPC)   features |= hardware_popc_m;
   if (av & AV_SPARC_VIS)    features |= vis1_instructions_m;
   if (av & AV_SPARC_VIS2)   features |= vis2_instructions_m;
   if (avn > 1) {
     uint_t av2 = avs[1];
 #ifndef AV2_SPARC_SPARC5
 #define AV2_SPARC_SPARC5 0x00000008 /* The 29 new fp and sub instructions */
 #endif
     if (av2 & AV2_SPARC_SPARC5)       features |= sparc5_instructions_m;
   }
   // We only build on Solaris 10 and up, but some of the values below
   // are not defined on all versions of Solaris 10, so we define them,
   // if necessary.
 #ifndef AV_SPARC_ASI_BLK_INIT
 #define AV_SPARC_ASI_BLK_INIT 0x0080  /* ASI_BLK_INIT_xxx ASI */
 #endif
   if (av & AV_SPARC_ASI_BLK_INIT) features |= blk_init_instructions_m;
 #ifndef AV_SPARC_FMAF
 #define AV_SPARC_FMAF 0x0100        /* Fused Multiply-Add */
 #endif
   if (av & AV_SPARC_FMAF)         features |= fmaf_instructions_m;
 #ifndef AV_SPARC_FMAU
 #define AV_SPARC_FMAU    0x0200  /* Unfused Multiply-Add */
 #endif
   if (av & AV_SPARC_FMAU)         features |= fmau_instructions_m;
 #ifndef AV_SPARC_VIS3
 #define AV_SPARC_VIS3    0x0400  /* VIS3 instruction set extensions */
 #endif
   if (av & AV_SPARC_VIS3)         features |= vis3_instructions_m;
 #ifndef AV_SPARC_CBCOND
 #define AV_SPARC_CBCOND 0x10000000  /* compare and branch instrs supported */
 #endif
   if (av & AV_SPARC_CBCOND)       features |= cbcond_instructions_m;
 #ifndef AV_SPARC_AES
 #define AV_SPARC_AES 0x00020000  /* aes instrs supported */
 #endif
   if (av & AV_SPARC_AES)       features |= aes_instructions_m;
 #ifndef AV_SPARC_SHA1
 #define AV_SPARC_SHA1   0x00400000  /* sha1 instruction supported */
 #endif
   if (av & AV_SPARC_SHA1)         features |= sha1_instruction_m;
 #ifndef AV_SPARC_SHA256
 #define AV_SPARC_SHA256 0x00800000  /* sha256 instruction supported */
 #endif
   if (av & AV_SPARC_SHA256)       features |= sha256_instruction_m;
 #ifndef AV_SPARC_SHA512
 #define AV_SPARC_SHA512 0x01000000  /* sha512 instruction supported */
 #endif
   if (av & AV_SPARC_SHA512)       features |= sha512_instruction_m;
   // Determine the machine type.
   if (Sysinfo(SI_MACHINE).match("sun4v")) {
     features |= sun4v_m;
   }
   // If SI_CPUBRAND works, that means Solaris 12 API to get the cache line sizes
   // is available to us as well
   Sysinfo cpu_info(SI_CPUBRAND);
   bool use_solaris_12_api = cpu_info.valid();
   const char* impl = "unknown";
   int impl_m = 0;
   if (use_solaris_12_api) {
     impl = cpu_info.value();
 #ifndef PRODUCT
   if (PrintMiscellaneous && Verbose) {
     tty->print_cr("Parsing CPU implementation from %s", impl);
   }
 #endif
     impl_m = parse_features(impl);
   } else {
     // Otherwise use kstat to determine the machine type.
     kstat_ctl_t* kc = kstat_open();
     if (kc != NULL) {
       kstat_t* ksp = kstat_lookup(kc, (char*)"cpu_info", -1, NULL);
       if (ksp != NULL) {
         if (kstat_read(kc, ksp, NULL) != -1 && ksp->ks_data != NULL) {
           kstat_named_t* knm = (kstat_named_t *)ksp->ks_data;
           for (int i = 0; i < ksp->ks_ndata; i++) {
             if (strcmp((const char*)&(knm[i].name), "implementation") == 0) {
               impl = KSTAT_NAMED_STR_PTR(&knm[i]);
 #ifndef PRODUCT
               if (PrintMiscellaneous && Verbose) {
                 tty->print_cr("Parsing CPU implementation from %s", impl);
               }
 #endif
               impl_m = parse_features(impl);
               break;
             }
           }
         }
       }
       kstat_close(kc);
     }
   }
   assert(impl_m != 0, err_msg("Unrecognized CPU implementation %s", impl));
   features |= impl_m;
   bool is_sun4v = (features & sun4v_m) != 0;
   if (use_solaris_12_api && is_sun4v) {
     // If Solaris 12 API is supported and it's sun4v use sysconf() to get the cache line sizes
     Sysconf l1_dcache_line_size(_SC_DCACHE_LINESZ);
     if (l1_dcache_line_size.valid()) {
       _L1_data_cache_line_size =  l1_dcache_line_size.value();
     }
     Sysconf l2_dcache_line_size(_SC_L2CACHE_LINESZ);
     if (l2_dcache_line_size.valid()) {
       _L2_data_cache_line_size = l2_dcache_line_size.value();
     }
   } else {
     // Otherwise figure out the cache line sizes using PICL
     bool is_fujitsu = (features & sparc64_family_m) != 0;
     PICL picl(is_fujitsu, is_sun4v);
     _L1_data_cache_line_size = picl.L1_data_cache_line_size();
     _L2_data_cache_line_size = picl.L2_data_cache_line_size();
   }
   return features;
 }

Mercurial > jdk8-mips64-public > hotspot / annotate

src/os_cpu/solaris_sparc/vm/vm_version_solaris_sparc.cpp@3b5410755ebd (annotated)

src/os_cpu/solaris_sparc/vm/vm_version_solaris_sparc.cpp