Quellcode-Bibliothek

^© Kompilation durch diese Firma

[Weder Korrektheit noch Funktionsfähigkeit der Software werden zugesichert.]

Datei: loadlib_aix.hpp Sprache: C

/*
* Copyright (c) 2012, 2015 SAP SE. 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.
*
*/

#ifndef OS_AIX_PORTING_AIX_HPP
#define OS_AIX_PORTING_AIX_HPP

#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 mimic 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);

struct tbtable;

class AixSymbols {
public:

  // Given a program counter, tries to locate the traceback table and returns info from
  // it - e.g. function name, displacement of the pc inside the function, and the traceback
  // table itself.
  static bool get_function_name (
    address 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
    bool demangle                    // [in] whether to demangle the name
  );

  // Given a program counter, returns the name of the module (library and module) the pc points to
  static bool get_module_name (
    address pc,                      // [in] program counter
    char* p_name, size_t namelen     // [out] module name
  );

};

class AixNativeCallstack {
public:
  // This function can be used independently from os::init();
  static void print_callstack_for_context(outputStream* st, const ucontext_t* uc,
                                          bool demangle,
                                          char* buf, size_t buf_size);
};

class AixMisc {
public:
  struct stackbounds_t {
    address base; // high address (stack grows down)
    size_t size;
  };

  // Invokes pthread_getthrds_np() and returns its values. Note: values are
  // not aligned to stack page sizes.
  // This function can be used independently from os::init();
  static bool query_stack_bounds_for_current_thread(stackbounds_t* out);

};

#endif // OS_AIX_PORTING_AIX_HPP

¤ Dauer der Verarbeitung: 0.16 Sekunden (vorverarbeitet) ¤

Download des Quellennavigators
Download des sprechenden Kalenders
in der Quellcodebibliothek suchen

Haftungshinweis

Die Informationen auf dieser Webseite wurden nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit, noch Qualität der bereit gestellten Informationen zugesichert.

Bemerkung:

Die farbliche Syntaxdarstellung ist noch experimentell.