| |
| /*--------------------------------------------------------------------*/ |
| /*--- Code that is shared between MemCheck and AddrCheck. ---*/ |
| /*--- mc_common.c ---*/ |
| /*--------------------------------------------------------------------*/ |
| |
| /* |
| This file is part of MemCheck, a heavyweight Valgrind skin for |
| detecting memory errors, and AddrCheck, a lightweight Valgrind skin |
| for detecting memory errors. |
| |
| Copyright (C) 2000-2002 Julian Seward |
| jseward@acm.org |
| |
| This program is free software; you can redistribute it and/or |
| modify it under the terms of the GNU General Public License as |
| published by the Free Software Foundation; either version 2 of the |
| License, or (at your option) any later version. |
| |
| This program 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 for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with this program; if not, write to the Free Software |
| Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA |
| 02111-1307, USA. |
| |
| The GNU General Public License is contained in the file COPYING. |
| */ |
| |
| |
| #include "mc_common.h" |
| |
| /*------------------------------------------------------------*/ |
| /*--- Defns ---*/ |
| /*------------------------------------------------------------*/ |
| |
| /* These many bytes below %ESP are considered addressible if we're |
| doing the --workaround-gcc296-bugs hack. */ |
| #define VG_GCC296_BUG_STACK_SLOP 1024 |
| |
| /*------------------------------------------------------------*/ |
| /*--- Command line options ---*/ |
| /*------------------------------------------------------------*/ |
| |
| Bool MC_(clo_partial_loads_ok) = True; |
| Int MC_(clo_freelist_vol) = 1000000; |
| Bool MC_(clo_leak_check) = False; |
| VgRes MC_(clo_leak_resolution) = Vg_LowRes; |
| Bool MC_(clo_show_reachable) = False; |
| Bool MC_(clo_workaround_gcc296_bugs) = False; |
| Bool MC_(clo_cleanup) = True; |
| Bool MC_(clo_check_addrVs) = True; |
| Bool MC_(clo_avoid_strlen_errors) = True; |
| |
| Bool MC_(process_common_cmd_line_option)(Char* arg) |
| { |
| # define STREQ(s1,s2) (0==VG_(strcmp_ws)((s1),(s2))) |
| # define STREQN(nn,s1,s2) (0==VG_(strncmp_ws)((s1),(s2),(nn))) |
| |
| if (STREQ(arg, "--partial-loads-ok=yes")) |
| MC_(clo_partial_loads_ok) = True; |
| else if (STREQ(arg, "--partial-loads-ok=no")) |
| MC_(clo_partial_loads_ok) = False; |
| |
| else if (STREQN(15, arg, "--freelist-vol=")) { |
| MC_(clo_freelist_vol) = (Int)VG_(atoll)(&arg[15]); |
| if (MC_(clo_freelist_vol) < 0) MC_(clo_freelist_vol) = 0; |
| } |
| |
| else if (STREQ(arg, "--leak-check=yes")) |
| MC_(clo_leak_check) = True; |
| else if (STREQ(arg, "--leak-check=no")) |
| MC_(clo_leak_check) = False; |
| |
| else if (STREQ(arg, "--leak-resolution=low")) |
| MC_(clo_leak_resolution) = Vg_LowRes; |
| else if (STREQ(arg, "--leak-resolution=med")) |
| MC_(clo_leak_resolution) = Vg_MedRes; |
| else if (STREQ(arg, "--leak-resolution=high")) |
| MC_(clo_leak_resolution) = Vg_HighRes; |
| |
| else if (STREQ(arg, "--show-reachable=yes")) |
| MC_(clo_show_reachable) = True; |
| else if (STREQ(arg, "--show-reachable=no")) |
| MC_(clo_show_reachable) = False; |
| |
| else if (STREQ(arg, "--workaround-gcc296-bugs=yes")) |
| MC_(clo_workaround_gcc296_bugs) = True; |
| else if (STREQ(arg, "--workaround-gcc296-bugs=no")) |
| MC_(clo_workaround_gcc296_bugs) = False; |
| |
| else if (STREQ(arg, "--cleanup=yes")) |
| MC_(clo_cleanup) = True; |
| else if (STREQ(arg, "--cleanup=no")) |
| MC_(clo_cleanup) = False; |
| |
| else |
| return False; |
| |
| return True; |
| |
| #undef STREQ |
| #undef STREQN |
| } |
| |
| /*------------------------------------------------------------*/ |
| /*--- Comparing and printing errors ---*/ |
| /*------------------------------------------------------------*/ |
| |
| static __inline__ |
| void clear_AddrInfo ( AddrInfo* ai ) |
| { |
| ai->akind = Unknown; |
| ai->blksize = 0; |
| ai->rwoffset = 0; |
| ai->lastchange = NULL; |
| ai->stack_tid = VG_INVALID_THREADID; |
| ai->maybe_gcc = False; |
| } |
| |
| void MC_(clear_MemCheckError) ( MemCheckError* err_extra ) |
| { |
| err_extra->axskind = ReadAxs; |
| err_extra->size = 0; |
| clear_AddrInfo ( &err_extra->addrinfo ); |
| err_extra->isWrite = False; |
| } |
| |
| __attribute__ ((unused)) |
| static Bool eq_AddrInfo ( VgRes res, AddrInfo* ai1, AddrInfo* ai2 ) |
| { |
| if (ai1->akind != Undescribed |
| && ai2->akind != Undescribed |
| && ai1->akind != ai2->akind) |
| return False; |
| if (ai1->akind == Freed || ai1->akind == Mallocd) { |
| if (ai1->blksize != ai2->blksize) |
| return False; |
| if (!VG_(eq_ExeContext)(res, ai1->lastchange, ai2->lastchange)) |
| return False; |
| } |
| return True; |
| } |
| |
| /* Compare error contexts, to detect duplicates. Note that if they |
| are otherwise the same, the faulting addrs and associated rwoffsets |
| are allowed to be different. */ |
| |
| Bool SK_(eq_SkinError) ( VgRes res, Error* e1, Error* e2 ) |
| { |
| MemCheckError* e1_extra = VG_(get_error_extra)(e1); |
| MemCheckError* e2_extra = VG_(get_error_extra)(e2); |
| |
| switch (VG_(get_error_kind)(e1)) { |
| case CoreMemErr: { |
| Char *e1s, *e2s; |
| if (e1_extra->isWrite != e2_extra->isWrite) return False; |
| if (VG_(get_error_kind)(e2) != CoreMemErr) return False; |
| e1s = VG_(get_error_string)(e1); |
| e2s = VG_(get_error_string)(e2); |
| if (e1s == e2s) return True; |
| if (0 == VG_(strcmp)(e1s, e2s)) return True; |
| return False; |
| } |
| |
| case UserErr: |
| case ParamErr: |
| if (e1_extra->isWrite != e2_extra->isWrite) return False; |
| if (VG_(get_error_kind)(e1) == ParamErr |
| && 0 != VG_(strcmp)(VG_(get_error_string)(e1), |
| VG_(get_error_string)(e2))) return False; |
| return True; |
| |
| case FreeErr: |
| case FreeMismatchErr: |
| /* JRS 2002-Aug-26: comparing addrs seems overkill and can |
| cause excessive duplication of errors. Not even AddrErr |
| below does that. So don't compare either the .addr field |
| or the .addrinfo fields. */ |
| /* if (e1->addr != e2->addr) return False; */ |
| /* if (!eq_AddrInfo(res, &e1_extra->addrinfo, &e2_extra->addrinfo)) |
| return False; |
| */ |
| return True; |
| |
| case AddrErr: |
| /* if (e1_extra->axskind != e2_extra->axskind) return False; */ |
| if (e1_extra->size != e2_extra->size) return False; |
| /* |
| if (!eq_AddrInfo(res, &e1_extra->addrinfo, &e2_extra->addrinfo)) |
| return False; |
| */ |
| return True; |
| |
| case ValueErr: |
| if (e1_extra->size != e2_extra->size) return False; |
| return True; |
| |
| default: |
| VG_(printf)("Error:\n unknown error code %d\n", |
| VG_(get_error_kind)(e1)); |
| VG_(skin_panic)("unknown error code in SK_(eq_SkinError)"); |
| } |
| } |
| |
| void MC_(pp_AddrInfo) ( Addr a, AddrInfo* ai ) |
| { |
| switch (ai->akind) { |
| case Stack: |
| VG_(message)(Vg_UserMsg, |
| " Address 0x%x is on thread %d's stack", |
| a, ai->stack_tid); |
| break; |
| case Unknown: |
| if (ai->maybe_gcc) { |
| VG_(message)(Vg_UserMsg, |
| " Address 0x%x is just below %%esp. Possibly a bug in GCC/G++", |
| a); |
| VG_(message)(Vg_UserMsg, |
| " v 2.96 or 3.0.X. To suppress, use: --workaround-gcc296-bugs=yes"); |
| } else { |
| VG_(message)(Vg_UserMsg, |
| " Address 0x%x is not stack'd, malloc'd or free'd", a); |
| } |
| break; |
| case Freed: case Mallocd: case UserG: case UserS: { |
| UInt delta; |
| UChar* relative; |
| if (ai->rwoffset < 0) { |
| delta = (UInt)(- ai->rwoffset); |
| relative = "before"; |
| } else if (ai->rwoffset >= ai->blksize) { |
| delta = ai->rwoffset - ai->blksize; |
| relative = "after"; |
| } else { |
| delta = ai->rwoffset; |
| relative = "inside"; |
| } |
| if (ai->akind == UserS) { |
| VG_(message)(Vg_UserMsg, |
| " Address 0x%x is %d bytes %s a %d-byte stack red-zone created", |
| a, delta, relative, |
| ai->blksize ); |
| } else { |
| VG_(message)(Vg_UserMsg, |
| " Address 0x%x is %d bytes %s a block of size %d %s", |
| a, delta, relative, |
| ai->blksize, |
| ai->akind==Mallocd ? "alloc'd" |
| : ai->akind==Freed ? "free'd" |
| : "client-defined"); |
| } |
| VG_(pp_ExeContext)(ai->lastchange); |
| break; |
| } |
| default: |
| VG_(skin_panic)("MC_(pp_AddrInfo)"); |
| } |
| } |
| |
| /*------------------------------------------------------------*/ |
| /*--- Recording errors ---*/ |
| /*------------------------------------------------------------*/ |
| |
| /* Is this address within some small distance below %ESP? Used only |
| for the --workaround-gcc296-bugs kludge. */ |
| static Bool is_just_below_ESP( Addr esp, Addr aa ) |
| { |
| if ((UInt)esp > (UInt)aa |
| && ((UInt)esp - (UInt)aa) <= VG_GCC296_BUG_STACK_SLOP) |
| return True; |
| else |
| return False; |
| } |
| |
| /* This one called from generated code. */ |
| |
| void MC_(record_address_error) ( Addr a, Int size, Bool isWrite ) |
| { |
| MemCheckError err_extra; |
| Bool just_below_esp; |
| |
| just_below_esp = is_just_below_ESP( VG_(get_stack_pointer)(), a ); |
| |
| /* If this is caused by an access immediately below %ESP, and the |
| user asks nicely, we just ignore it. */ |
| if (MC_(clo_workaround_gcc296_bugs) && just_below_esp) |
| return; |
| |
| MC_(clear_MemCheckError)( &err_extra ); |
| err_extra.axskind = isWrite ? WriteAxs : ReadAxs; |
| err_extra.size = size; |
| err_extra.addrinfo.akind = Undescribed; |
| err_extra.addrinfo.maybe_gcc = just_below_esp; |
| VG_(maybe_record_error)( NULL, AddrErr, a, /*s*/NULL, &err_extra ); |
| } |
| |
| /* These ones are called from non-generated code */ |
| |
| /* This is for memory errors in pthread functions, as opposed to pthread API |
| errors which are found by the core. */ |
| void MC_(record_core_mem_error) ( ThreadState* tst, Bool isWrite, Char* msg ) |
| { |
| MemCheckError err_extra; |
| |
| MC_(clear_MemCheckError)( &err_extra ); |
| err_extra.isWrite = isWrite; |
| VG_(maybe_record_error)( tst, CoreMemErr, /*addr*/0, msg, &err_extra ); |
| } |
| |
| void MC_(record_param_error) ( ThreadState* tst, Addr a, Bool isWrite, |
| Char* msg ) |
| { |
| MemCheckError err_extra; |
| |
| sk_assert(NULL != tst); |
| MC_(clear_MemCheckError)( &err_extra ); |
| err_extra.addrinfo.akind = Undescribed; |
| err_extra.isWrite = isWrite; |
| VG_(maybe_record_error)( tst, ParamErr, a, msg, &err_extra ); |
| } |
| |
| void MC_(record_jump_error) ( ThreadState* tst, Addr a ) |
| { |
| MemCheckError err_extra; |
| |
| sk_assert(NULL != tst); |
| |
| MC_(clear_MemCheckError)( &err_extra ); |
| err_extra.axskind = ExecAxs; |
| err_extra.addrinfo.akind = Undescribed; |
| VG_(maybe_record_error)( tst, AddrErr, a, /*s*/NULL, &err_extra ); |
| } |
| |
| void MC_(record_free_error) ( ThreadState* tst, Addr a ) |
| { |
| MemCheckError err_extra; |
| |
| sk_assert(NULL != tst); |
| |
| MC_(clear_MemCheckError)( &err_extra ); |
| err_extra.addrinfo.akind = Undescribed; |
| VG_(maybe_record_error)( tst, FreeErr, a, /*s*/NULL, &err_extra ); |
| } |
| |
| void MC_(record_freemismatch_error) ( ThreadState* tst, Addr a ) |
| { |
| MemCheckError err_extra; |
| |
| sk_assert(NULL != tst); |
| |
| MC_(clear_MemCheckError)( &err_extra ); |
| err_extra.addrinfo.akind = Undescribed; |
| VG_(maybe_record_error)( tst, FreeMismatchErr, a, /*s*/NULL, &err_extra ); |
| } |
| |
| /*------------------------------------------------------------*/ |
| /*--- Suppressions ---*/ |
| /*------------------------------------------------------------*/ |
| |
| Bool SK_(read_extra_suppression_info) ( Int fd, Char* buf, Int nBuf, Supp *su ) |
| { |
| Bool eof; |
| |
| if (VG_(get_supp_kind)(su) == ParamSupp) { |
| eof = VG_(get_line) ( fd, buf, nBuf ); |
| if (eof) return False; |
| VG_(set_supp_string)(su, VG_(strdup)(buf)); |
| } |
| return True; |
| } |
| |
| #define STREQ(s1,s2) (s1 != NULL && s2 != NULL \ |
| && VG_(strcmp)((s1),(s2))==0) |
| |
| extern Bool SK_(error_matches_suppression)(Error* err, Supp* su) |
| { |
| UInt su_size; |
| MemCheckError* err_extra = VG_(get_error_extra)(err); |
| ErrorKind ekind = VG_(get_error_kind )(err); |
| |
| switch (VG_(get_supp_kind)(su)) { |
| case ParamSupp: |
| return (ekind == ParamErr |
| && STREQ(VG_(get_error_string)(err), VG_(get_supp_string)(su))); |
| |
| case CoreMemSupp: |
| return (ekind == CoreMemErr |
| && STREQ(VG_(get_error_string)(err), VG_(get_supp_string)(su))); |
| |
| case Value0Supp: su_size = 0; goto value_case; |
| case Value1Supp: su_size = 1; goto value_case; |
| case Value2Supp: su_size = 2; goto value_case; |
| case Value4Supp: su_size = 4; goto value_case; |
| case Value8Supp: su_size = 8; goto value_case; |
| value_case: |
| return (ekind == ValueErr && err_extra->size == su_size); |
| |
| case Addr1Supp: su_size = 1; goto addr_case; |
| case Addr2Supp: su_size = 2; goto addr_case; |
| case Addr4Supp: su_size = 4; goto addr_case; |
| case Addr8Supp: su_size = 8; goto addr_case; |
| addr_case: |
| return (ekind == AddrErr && err_extra->size == su_size); |
| |
| case FreeSupp: |
| return (ekind == FreeErr || ekind == FreeMismatchErr); |
| |
| default: |
| VG_(printf)("Error:\n" |
| " unknown suppression type %d\n", |
| VG_(get_supp_kind)(su)); |
| VG_(skin_panic)("unknown suppression type in " |
| "SK_(error_matches_suppression)"); |
| } |
| } |
| |
| # undef STREQ |
| |
| /*------------------------------------------------------------*/ |
| /*--- Crude profiling machinery. ---*/ |
| /*------------------------------------------------------------*/ |
| |
| /* Event index. If just the name of the fn is given, this means the |
| number of calls to the fn. Otherwise it is the specified event. |
| Ones marked 'M' are MemCheck only. Ones marked 'A' are AddrCheck only. |
| The rest are shared. |
| |
| 10 alloc_secondary_map |
| |
| 20 get_abit |
| M 21 get_vbyte |
| 22 set_abit |
| M 23 set_vbyte |
| 24 get_abits4_ALIGNED |
| M 25 get_vbytes4_ALIGNED |
| |
| 30 set_address_range_perms |
| 31 set_address_range_perms(lower byte loop) |
| 32 set_address_range_perms(quadword loop) |
| 33 set_address_range_perms(upper byte loop) |
| |
| 35 make_noaccess |
| 36 make_writable |
| 37 make_readable |
| A 38 make_accessible |
| |
| 40 copy_address_range_state |
| 41 copy_address_range_state(byte loop) |
| 42 check_writable |
| 43 check_writable(byte loop) |
| 44 check_readable |
| 45 check_readable(byte loop) |
| 46 check_readable_asciiz |
| 47 check_readable_asciiz(byte loop) |
| A 48 check_accessible |
| A 49 check_accessible(byte loop) |
| |
| 50 make_noaccess_aligned |
| 51 make_writable_aligned |
| |
| M 60 helperc_LOADV4 |
| M 61 helperc_STOREV4 |
| M 62 helperc_LOADV2 |
| M 63 helperc_STOREV2 |
| M 64 helperc_LOADV1 |
| M 65 helperc_STOREV1 |
| |
| A 66 helperc_ACCESS4 |
| A 67 helperc_ACCESS2 |
| A 68 helperc_ACCESS1 |
| |
| M 70 rim_rd_V4_SLOWLY |
| M 71 rim_wr_V4_SLOWLY |
| M 72 rim_rd_V2_SLOWLY |
| M 73 rim_wr_V2_SLOWLY |
| M 74 rim_rd_V1_SLOWLY |
| M 75 rim_wr_V1_SLOWLY |
| |
| A 76 ACCESS4_SLOWLY |
| A 77 ACCESS2_SLOWLY |
| A 78 ACCESS1_SLOWLY |
| |
| 80 fpu_read |
| 81 fpu_read aligned 4 |
| 82 fpu_read aligned 8 |
| 83 fpu_read 2 |
| 84 fpu_read 10/28/108 |
| |
| M 85 fpu_write |
| M 86 fpu_write aligned 4 |
| M 87 fpu_write aligned 8 |
| M 88 fpu_write 2 |
| M 89 fpu_write 10/28/108 |
| |
| 90 fpu_access |
| 91 fpu_access aligned 4 |
| 92 fpu_access aligned 8 |
| 93 fpu_access 2 |
| 94 fpu_access 10/28/108 |
| |
| 100 fpu_access_check_SLOWLY |
| 101 fpu_access_check_SLOWLY(byte loop) |
| */ |
| |
| #ifdef VG_PROFILE_MEMORY |
| |
| #define N_PROF_EVENTS 150 |
| |
| extern UInt MC_(event_ctr)[N_PROF_EVENTS]; |
| |
| void MC_(init_prof_mem) ( void ) |
| { |
| Int i; |
| for (i = 0; i < N_PROF_EVENTS; i++) |
| MC_(event_ctr)[i] = 0; |
| } |
| |
| void MC_(done_prof_mem) ( void ) |
| { |
| Int i; |
| for (i = 0; i < N_PROF_EVENTS; i++) { |
| if ((i % 10) == 0) |
| VG_(printf)("\n"); |
| if (MC_(event_ctr)[i] > 0) |
| VG_(printf)( "prof mem event %2d: %d\n", i, MC_(event_ctr)[i] ); |
| } |
| VG_(printf)("\n"); |
| } |
| |
| #else |
| |
| void MC_(init_prof_mem) ( void ) { } |
| void MC_(done_prof_mem) ( void ) { } |
| |
| #define PROF_EVENT(ev) /* */ |
| |
| #endif |
| |
| /*------------------------------------------------------------*/ |
| /*--- Shadow chunks info ---*/ |
| /*------------------------------------------------------------*/ |
| |
| void MC_(set_where)( ShadowChunk* sc, ExeContext* ec ) |
| { |
| VG_(set_sc_extra)( sc, 0, (UInt)ec ); |
| } |
| |
| ExeContext *MC_(get_where)( ShadowChunk* sc ) |
| { |
| return (ExeContext*)VG_(get_sc_extra)(sc, 0); |
| } |
| |
| void SK_(complete_shadow_chunk) ( ShadowChunk* sc, ThreadState* tst ) |
| { |
| VG_(set_sc_extra) ( sc, 0, (UInt)VG_(get_ExeContext)(tst) ); |
| } |
| |
| |
| /*------------------------------------------------------------*/ |
| /*--- Postponing free()ing ---*/ |
| /*------------------------------------------------------------*/ |
| |
| /* Holds blocks after freeing. */ |
| static ShadowChunk* freed_list_start = NULL; |
| static ShadowChunk* freed_list_end = NULL; |
| static Int freed_list_volume = 0; |
| |
| __attribute__ ((unused)) |
| Int MC_(count_freelist) ( void ) |
| { |
| ShadowChunk* sc; |
| Int n = 0; |
| for (sc = freed_list_start; sc != NULL; sc = VG_(get_sc_next)(sc)) |
| n++; |
| return n; |
| } |
| |
| __attribute__ ((unused)) |
| void MC_(freelist_sanity) ( void ) |
| { |
| ShadowChunk* sc; |
| Int n = 0; |
| /* VG_(printf)("freelist sanity\n"); */ |
| for (sc = freed_list_start; sc != NULL; sc = VG_(get_sc_next)(sc)) |
| n += VG_(get_sc_size)(sc); |
| sk_assert(n == freed_list_volume); |
| } |
| |
| /* Put a shadow chunk on the freed blocks queue, possibly freeing up |
| some of the oldest blocks in the queue at the same time. */ |
| static void add_to_freed_queue ( ShadowChunk* sc ) |
| { |
| ShadowChunk* sc1; |
| |
| /* Put it at the end of the freed list */ |
| if (freed_list_end == NULL) { |
| sk_assert(freed_list_start == NULL); |
| freed_list_end = freed_list_start = sc; |
| freed_list_volume = VG_(get_sc_size)(sc); |
| } else { |
| sk_assert(VG_(get_sc_next)(freed_list_end) == NULL); |
| VG_(set_sc_next)(freed_list_end, sc); |
| freed_list_end = sc; |
| freed_list_volume += VG_(get_sc_size)(sc); |
| } |
| VG_(set_sc_next)(sc, NULL); |
| |
| /* Release enough of the oldest blocks to bring the free queue |
| volume below vg_clo_freelist_vol. */ |
| |
| while (freed_list_volume > MC_(clo_freelist_vol)) { |
| /* freelist_sanity(); */ |
| sk_assert(freed_list_start != NULL); |
| sk_assert(freed_list_end != NULL); |
| |
| sc1 = freed_list_start; |
| freed_list_volume -= VG_(get_sc_size)(sc1); |
| /* VG_(printf)("volume now %d\n", freed_list_volume); */ |
| sk_assert(freed_list_volume >= 0); |
| |
| if (freed_list_start == freed_list_end) { |
| freed_list_start = freed_list_end = NULL; |
| } else { |
| freed_list_start = VG_(get_sc_next)(sc1); |
| } |
| VG_(set_sc_next)(sc1, NULL); /* just paranoia */ |
| VG_(free_ShadowChunk) ( sc1 ); |
| } |
| } |
| |
| /* Return the first shadow chunk satisfying the predicate p. */ |
| ShadowChunk* MC_(any_matching_freed_ShadowChunks) ( Bool (*p)(ShadowChunk*) ) |
| { |
| ShadowChunk* sc; |
| |
| /* No point looking through freed blocks if we're not keeping |
| them around for a while... */ |
| for (sc = freed_list_start; sc != NULL; sc = VG_(get_sc_next)(sc)) |
| if (p(sc)) |
| return sc; |
| |
| return NULL; |
| } |
| |
| void SK_(alt_free) ( ShadowChunk* sc, ThreadState* tst ) |
| { |
| /* Record where freed */ |
| MC_(set_where)( sc, VG_(get_ExeContext) ( tst ) ); |
| |
| /* Put it out of harm's way for a while. */ |
| add_to_freed_queue ( sc ); |
| } |
| |
| /*------------------------------------------------------------*/ |
| /*--- Syscall wrappers ---*/ |
| /*------------------------------------------------------------*/ |
| |
| void* SK_(pre_syscall) ( ThreadId tid, UInt syscallno, Bool isBlocking ) |
| { |
| Int sane = SK_(cheap_sanity_check)(); |
| return (void*)sane; |
| } |
| |
| void SK_(post_syscall) ( ThreadId tid, UInt syscallno, |
| void* pre_result, Int res, Bool isBlocking ) |
| { |
| Int sane_before_call = (Int)pre_result; |
| Bool sane_after_call = SK_(cheap_sanity_check)(); |
| |
| if ((Int)sane_before_call && (!sane_after_call)) { |
| VG_(message)(Vg_DebugMsg, "post-syscall: "); |
| VG_(message)(Vg_DebugMsg, |
| "probable sanity check failure for syscall number %d\n", |
| syscallno ); |
| VG_(skin_panic)("aborting due to the above ... bye!"); |
| } |
| } |
| |
| /*--------------------------------------------------------------------*/ |
| /*--- end mc_common.c ---*/ |
| /*--------------------------------------------------------------------*/ |