Mercurial > jdk8-mips64-public > hotspot / file revision

 /*

  * 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.

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  */

 #include <stddef.h>

 // Header file to contain porting-relevant code which does not have a

 // home anywhere else and which can not go into os_<platform>.h because

 // that header is included inside the os class definition, hence all

 // its content is part of the os class.

 // Aix' own version of dladdr().

 // This function tries to mimick dladdr(3) on Linux

 // (see http://linux.die.net/man/3/dladdr)

 // dladdr(3) is not POSIX but a GNU extension, and is not available on AIX.

 //

 // Differences between AIX dladdr and Linux dladdr:

 //

 // 1) Dl_info.dli_fbase: can never work, is disabled.

 //   A loaded image on AIX is divided in multiple segments, at least two

 //   (text and data) but potentially also far more. This is because the loader may

 //   load each member into an own segment, as for instance happens with the libC.a

 // 2) Dl_info.dli_sname: This only works for code symbols (functions); for data, a

 //   zero-length string is returned ("").

 // 3) Dl_info.dli_saddr: For code, this will return the entry point of the function,

 //   not the function descriptor.

 typedef struct {

   const char *dli_fname; // file path of loaded library

   // void *dli_fbase;

   const char *dli_sname; // symbol name; "" if not known

   void *dli_saddr;       // address of *entry* of function; not function descriptor;

 } Dl_info;

 // Note: we export this to use it inside J2se too

 #ifdef __cplusplus

 extern "C"

 #endif

 int dladdr(void *addr, Dl_info *info);

 // The semantics in this file are thus that codeptr_t is a *real code ptr*.

 // This means that any function taking codeptr_t as arguments will assume

 // a real codeptr and won't handle function descriptors (eg getFuncName),

 // whereas functions taking address as args will deal with function

 // descriptors (eg os::dll_address_to_library_name).

 typedef unsigned int* codeptr_t;

 // helper function - given a program counter, tries to locate the traceback table and

 // returns info from it (like, most importantly, function name, displacement of the

 // pc inside the function, and the traceback table itself.

 #ifdef __cplusplus

 extern "C"

 #endif

 int getFuncName(

       codeptr_t pc,                    // [in] program counter

       char* p_name, size_t namelen,    // [out] optional: user provided buffer for the function name

       int* p_displacement,             // [out] optional: displacement

       const struct tbtable** p_tb,     // [out] optional: ptr to traceback table to get further information

       char* p_errmsg, size_t errmsglen // [out] optional: user provided buffer for error messages

     );