bart | f056aab | 2014-06-09 07:55:14 +0000 | [diff] [blame] | 1 | /*--------------------------------------------------------------------*/ |
| 2 | /*--- Client-space code for DRD. drd_libstdcxx_intercepts.c ---*/ |
| 3 | /*--------------------------------------------------------------------*/ |
| 4 | |
| 5 | /* |
| 6 | This file is part of DRD, a thread error detector. |
| 7 | |
sewardj | b3a1e4b | 2015-08-21 11:32:26 +0000 | [diff] [blame] | 8 | Copyright (C) 2014-2015 Bart Van Assche <bvanassche@acm.org>. |
bart | f056aab | 2014-06-09 07:55:14 +0000 | [diff] [blame] | 9 | |
| 10 | This program is free software; you can redistribute it and/or |
| 11 | modify it under the terms of the GNU General Public License as |
| 12 | published by the Free Software Foundation; either version 2 of the |
| 13 | License, or (at your option) any later version. |
| 14 | |
| 15 | This program is distributed in the hope that it will be useful, but |
| 16 | WITHOUT ANY WARRANTY; without even the implied warranty of |
| 17 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 18 | General Public License for more details. |
| 19 | |
| 20 | You should have received a copy of the GNU General Public License |
| 21 | along with this program; if not, write to the Free Software |
| 22 | Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 23 | 02111-1307, USA. |
| 24 | |
| 25 | The GNU General Public License is contained in the file COPYING. |
| 26 | */ |
| 27 | |
| 28 | /* --------------------------------------------------------------------- |
| 29 | ALL THE CODE IN THIS FILE RUNS ON THE SIMULATED CPU. |
| 30 | |
| 31 | These functions are not called directly - they're the targets of code |
| 32 | redirection or load notifications (see pub_core_redir.h for info). |
| 33 | They're named weirdly so that the intercept code can find them when the |
| 34 | shared object is initially loaded. |
| 35 | |
| 36 | Note that this filename has the "drd_" prefix because it can appear |
| 37 | in stack traces, and the "drd_" makes it a little clearer that it |
| 38 | originates from Valgrind. |
| 39 | ------------------------------------------------------------------ */ |
| 40 | |
| 41 | #include "drd_basics.h" /* DRD_() */ |
| 42 | #include "drd_clientreq.h" |
| 43 | #include "pub_tool_redir.h" /* VG_WRAP_FUNCTION_ZZ() */ |
| 44 | |
| 45 | /* From <cxxabi.h> */ |
| 46 | int __cxa_guard_acquire(void* guard); |
| 47 | void __cxa_guard_release(void* guard) __attribute__((__nothrow__)); |
| 48 | void __cxa_guard_abort(void* guard) __attribute__((__nothrow__)); |
| 49 | |
| 50 | #define LIBSTDCXX_FUNC(ret_ty, zf, implf, argl_decl, argl) \ |
| 51 | ret_ty VG_WRAP_FUNCTION_ZZ(VG_Z_LIBSTDCXX_SONAME,zf) argl_decl; \ |
| 52 | ret_ty VG_WRAP_FUNCTION_ZZ(VG_Z_LIBSTDCXX_SONAME,zf) argl_decl \ |
| 53 | { return implf argl; } |
| 54 | |
| 55 | /* |
| 56 | * Not inlining one of the intercept functions will cause the regression |
| 57 | * tests to fail because this would cause an additional stackfram to appear |
| 58 | * in the output. The __always_inline macro guarantees that inlining will |
| 59 | * happen, even when compiling with optimization disabled. |
| 60 | */ |
| 61 | #undef __always_inline /* since already defined in <cdefs.h> */ |
| 62 | #if __GNUC__ > 3 || __GNUC__ == 3 && __GNUC_MINOR__ >= 2 |
| 63 | #define __always_inline __inline__ __attribute__((always_inline)) |
| 64 | #else |
| 65 | #define __always_inline __inline__ |
| 66 | #endif |
| 67 | |
| 68 | static __always_inline |
| 69 | int __cxa_guard_acquire_intercept(void *guard) |
| 70 | { |
| 71 | int ret; |
| 72 | OrigFn fn; |
| 73 | VALGRIND_GET_ORIG_FN(fn); |
| 74 | VALGRIND_DO_CLIENT_REQUEST_STMT(VG_USERREQ__PRE_MUTEX_LOCK, |
| 75 | guard, mutex_type_cxa_guard, 0, 0, 0); |
| 76 | CALL_FN_W_W(ret, fn, guard); |
| 77 | VALGRIND_DO_CLIENT_REQUEST_STMT(VG_USERREQ__POST_MUTEX_LOCK, |
| 78 | guard, 1, 0, 0, 0); |
| 79 | if (ret == 0) { |
| 80 | VALGRIND_DO_CLIENT_REQUEST_STMT(VG_USERREQ__PRE_MUTEX_UNLOCK, |
| 81 | guard, mutex_type_cxa_guard, 0, 0, 0); |
| 82 | VALGRIND_DO_CLIENT_REQUEST_STMT(VG_USERREQ__POST_MUTEX_UNLOCK, |
| 83 | guard, 0, 0, 0, 0); |
| 84 | } |
| 85 | return ret; |
| 86 | } |
| 87 | |
| 88 | LIBSTDCXX_FUNC(int, ZuZucxaZuguardZuacquire, __cxa_guard_acquire_intercept, |
| 89 | (void *guard), (guard)); |
| 90 | LIBSTDCXX_FUNC(int, ZuZucxaZuguardZuacquireZAZACXXABIZu1Zd3, |
| 91 | __cxa_guard_acquire_intercept, (void *guard), (guard)); |
| 92 | |
| 93 | static __always_inline |
| 94 | void __cxa_guard_abort_release_intercept(void *guard) |
| 95 | { |
| 96 | int ret; |
| 97 | OrigFn fn; |
| 98 | VALGRIND_GET_ORIG_FN(fn); |
| 99 | VALGRIND_DO_CLIENT_REQUEST_STMT(VG_USERREQ__PRE_MUTEX_UNLOCK, |
| 100 | guard, mutex_type_cxa_guard, 0, 0, 0); |
| 101 | CALL_FN_W_W(ret, fn, guard); |
| 102 | VALGRIND_DO_CLIENT_REQUEST_STMT(VG_USERREQ__POST_MUTEX_UNLOCK, |
| 103 | guard, 0, 0, 0, 0); |
| 104 | } |
| 105 | |
| 106 | LIBSTDCXX_FUNC(void, ZuZucxaZuguardZurelease, |
| 107 | __cxa_guard_abort_release_intercept, (void *guard), (guard)); |
| 108 | LIBSTDCXX_FUNC(void, ZuZucxaZuguardZuabort, |
| 109 | __cxa_guard_abort_release_intercept, (void *guard), (guard)); |