[compiler-rt] r317863 - [msan] Move sigaction_impl and signal_impl
Vitaly Buka via llvm-commits
llvm-commits at lists.llvm.org
Thu Nov 9 18:06:50 PST 2017
Author: vitalybuka
Date: Thu Nov 9 18:06:50 2017
New Revision: 317863
URL: http://llvm.org/viewvc/llvm-project?rev=317863&view=rev
Log:
[msan] Move sigaction_impl and signal_impl
Modified:
compiler-rt/trunk/lib/msan/msan_interceptors.cc
Modified: compiler-rt/trunk/lib/msan/msan_interceptors.cc
URL: http://llvm.org/viewvc/llvm-project/compiler-rt/trunk/lib/msan/msan_interceptors.cc?rev=317863&r1=317862&r2=317863&view=diff
==============================================================================
--- compiler-rt/trunk/lib/msan/msan_interceptors.cc (original)
+++ compiler-rt/trunk/lib/msan/msan_interceptors.cc Thu Nov 9 18:06:50 2017
@@ -1020,58 +1020,6 @@ INTERCEPTOR(int, signal, int signo, uptr
return REAL(signal)(signo, cb);
}
-static int sigaction_impl(int signo, const __sanitizer_sigaction *act,
- __sanitizer_sigaction *oldact) {
- ENSURE_MSAN_INITED();
- if (act) read_sigaction(act);
- int res;
- if (flags()->wrap_signals) {
- SpinMutexLock lock(&sigactions_mu);
- CHECK_LT(signo, kMaxSignals);
- uptr old_cb = atomic_load(&sigactions[signo], memory_order_relaxed);
- __sanitizer_sigaction new_act;
- __sanitizer_sigaction *pnew_act = act ? &new_act : nullptr;
- if (act) {
- REAL(memcpy)(pnew_act, act, sizeof(__sanitizer_sigaction));
- uptr cb = (uptr)pnew_act->sigaction;
- uptr new_cb = (pnew_act->sa_flags & __sanitizer::sa_siginfo)
- ? (uptr)SignalAction
- : (uptr)SignalHandler;
- if (cb != __sanitizer::sig_ign && cb != __sanitizer::sig_dfl) {
- atomic_store(&sigactions[signo], cb, memory_order_relaxed);
- pnew_act->sigaction = (void (*)(int, void *, void *))new_cb;
- }
- }
- res = REAL(sigaction)(signo, pnew_act, oldact);
- if (res == 0 && oldact) {
- uptr cb = (uptr)oldact->sigaction;
- if (cb != __sanitizer::sig_ign && cb != __sanitizer::sig_dfl) {
- oldact->sigaction = (void (*)(int, void *, void *))old_cb;
- }
- }
- } else {
- res = REAL(sigaction)(signo, act, oldact);
- }
-
- if (res == 0 && oldact) {
- __msan_unpoison(oldact, sizeof(__sanitizer_sigaction));
- }
- return res;
-}
-
-static uptr signal_impl(int signo, uptr cb) {
- ENSURE_MSAN_INITED();
- if (flags()->wrap_signals) {
- CHECK_LT(signo, kMaxSignals);
- SpinMutexLock lock(&sigactions_mu);
- if (cb != __sanitizer::sig_ign && cb != __sanitizer::sig_dfl) {
- atomic_store(&sigactions[signo], cb, memory_order_relaxed);
- cb = (uptr)&SignalHandler;
- }
- }
- return cb;
-}
-
extern "C" int pthread_attr_init(void *attr);
extern "C" int pthread_attr_destroy(void *attr);
@@ -1327,6 +1275,59 @@ int OnExit() {
#include "sanitizer_common/sanitizer_platform_interceptors.h"
#include "sanitizer_common/sanitizer_common_interceptors.inc"
+
+static int sigaction_impl(int signo, const __sanitizer_sigaction *act,
+ __sanitizer_sigaction *oldact) {
+ ENSURE_MSAN_INITED();
+ if (act) read_sigaction(act);
+ int res;
+ if (flags()->wrap_signals) {
+ SpinMutexLock lock(&sigactions_mu);
+ CHECK_LT(signo, kMaxSignals);
+ uptr old_cb = atomic_load(&sigactions[signo], memory_order_relaxed);
+ __sanitizer_sigaction new_act;
+ __sanitizer_sigaction *pnew_act = act ? &new_act : nullptr;
+ if (act) {
+ REAL(memcpy)(pnew_act, act, sizeof(__sanitizer_sigaction));
+ uptr cb = (uptr)pnew_act->sigaction;
+ uptr new_cb = (pnew_act->sa_flags & __sanitizer::sa_siginfo)
+ ? (uptr)SignalAction
+ : (uptr)SignalHandler;
+ if (cb != __sanitizer::sig_ign && cb != __sanitizer::sig_dfl) {
+ atomic_store(&sigactions[signo], cb, memory_order_relaxed);
+ pnew_act->sigaction = (void (*)(int, void *, void *))new_cb;
+ }
+ }
+ res = REAL(sigaction)(signo, pnew_act, oldact);
+ if (res == 0 && oldact) {
+ uptr cb = (uptr)oldact->sigaction;
+ if (cb != __sanitizer::sig_ign && cb != __sanitizer::sig_dfl) {
+ oldact->sigaction = (void (*)(int, void *, void *))old_cb;
+ }
+ }
+ } else {
+ res = REAL(sigaction)(signo, act, oldact);
+ }
+
+ if (res == 0 && oldact) {
+ __msan_unpoison(oldact, sizeof(__sanitizer_sigaction));
+ }
+ return res;
+}
+
+static uptr signal_impl(int signo, uptr cb) {
+ ENSURE_MSAN_INITED();
+ if (flags()->wrap_signals) {
+ CHECK_LT(signo, kMaxSignals);
+ SpinMutexLock lock(&sigactions_mu);
+ if (cb != __sanitizer::sig_ign && cb != __sanitizer::sig_dfl) {
+ atomic_store(&sigactions[signo], cb, memory_order_relaxed);
+ cb = (uptr)&SignalHandler;
+ }
+ }
+ return cb;
+}
+
#define COMMON_SYSCALL_PRE_READ_RANGE(p, s) CHECK_UNPOISONED(p, s)
#define COMMON_SYSCALL_PRE_WRITE_RANGE(p, s) \
do { \
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