| /* |
| * 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. |
| * |
| */ |
| |
| #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 |
| ); |