gcc/5.4.0: drop 'sigaltstack' usage, bug #629502

Fixes asan build failure against glibc-2.26.

Bug: https://bugs.gentoo.org/629502

2 files changed, 79 insertions, 0 deletions

diff --git a/src/patchsets/gcc/5.4.0/gentoo/94_all_no-sigaltstack.patch b/src/patchsets/gcc/5.4.0/gentoo/94_all_no-sigaltstack.patch
new file mode 100644
index 0000000000..838c811571
--- /dev/null
+++ b/src/patchsets/gcc/5.4.0/gentoo/94_all_no-sigaltstack.patch
@@ -0,0 +1,77 @@
+https://bugs.gentoo.org/629502
+
+commit 67dce0587409353e1b6e38c4b33ed89d4ccabe5c
+Author: jakub <jakub@138bc75d-0d04-0410-961f-82ee72b054a4>
+Date:   Fri Jul 14 09:10:45 2017 +0000
+
+            PR sanitizer/81066
+            * sanitizer_common/sanitizer_linux.h: Cherry-pick upstream r307969.
+            * sanitizer_common/sanitizer_linux.cc: Likewise.
+            * sanitizer_common/sanitizer_stoptheworld_linux_libcdep.cc: Likewise.
+            * tsan/tsan_platform_linux.cc: Likewise.
+    
+    
+    git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@250200 138bc75d-0d04-0410-961f-82ee72b054a4
+
+diff --git a/libsanitizer/sanitizer_common/sanitizer_linux.cc b/libsanitizer/sanitizer_common/sanitizer_linux.cc
+index 806fcd5e284..5b6f18602e7 100644
+--- a/libsanitizer/sanitizer_common/sanitizer_linux.cc
++++ b/libsanitizer/sanitizer_common/sanitizer_linux.cc
+@@ -605,8 +605,7 @@ uptr internal_prctl(int option, uptr arg2, uptr arg3, uptr arg4, uptr arg5) {
+ }
+ #endif
+ 
+-uptr internal_sigaltstack(const struct sigaltstack *ss,
+-                         struct sigaltstack *oss) {
++uptr internal_sigaltstack(const void *ss, void *oss) {
+   return internal_syscall(SYSCALL(sigaltstack), (uptr)ss, (uptr)oss);
+ }
+ 
+diff --git a/libsanitizer/sanitizer_common/sanitizer_linux.h b/libsanitizer/sanitizer_common/sanitizer_linux.h
+index 895bfc18195..a42df576405 100644
+--- a/libsanitizer/sanitizer_common/sanitizer_linux.h
++++ b/libsanitizer/sanitizer_common/sanitizer_linux.h
+@@ -19,7 +19,6 @@
+ #include "sanitizer_platform_limits_posix.h"
+ 
+ struct link_map;  // Opaque type returned by dlopen().
+-struct sigaltstack;
+ 
+ namespace __sanitizer {
+ // Dirent structure for getdents(). Note that this structure is different from
+@@ -28,8 +27,7 @@ struct linux_dirent;
+ 
+ // Syscall wrappers.
+ uptr internal_getdents(fd_t fd, struct linux_dirent *dirp, unsigned int count);
+-uptr internal_sigaltstack(const struct sigaltstack* ss,
+-                          struct sigaltstack* oss);
++uptr internal_sigaltstack(const void* ss, void* oss);
+ uptr internal_sigprocmask(int how, __sanitizer_sigset_t *set,
+     __sanitizer_sigset_t *oldset);
+ 
+diff --git a/libsanitizer/sanitizer_common/sanitizer_stoptheworld_linux_libcdep.cc b/libsanitizer/sanitizer_common/sanitizer_stoptheworld_linux_libcdep.cc
+index 891386dc0ba..234e8c652c6 100644
+--- a/libsanitizer/sanitizer_common/sanitizer_stoptheworld_linux_libcdep.cc
++++ b/libsanitizer/sanitizer_common/sanitizer_stoptheworld_linux_libcdep.cc
+@@ -273,7 +273,7 @@ static int TracerThread(void* argument) {
+ 
+   // Alternate stack for signal handling.
+   InternalScopedBuffer<char> handler_stack_memory(kHandlerStackSize);
+-  struct sigaltstack handler_stack;
++  stack_t handler_stack;
+   internal_memset(&handler_stack, 0, sizeof(handler_stack));
+   handler_stack.ss_sp = handler_stack_memory.data();
+   handler_stack.ss_size = kHandlerStackSize;
+diff --git a/libsanitizer/tsan/tsan_platform_linux.cc b/libsanitizer/tsan/tsan_platform_linux.cc
+index 2ed5718a12e..6f972ab0dd6 100644
+--- a/libsanitizer/tsan/tsan_platform_linux.cc
++++ b/libsanitizer/tsan/tsan_platform_linux.cc
+@@ -287,7 +287,7 @@ void InitializePlatform() {
+ int ExtractResolvFDs(void *state, int *fds, int nfd) {
+ #if SANITIZER_LINUX && !SANITIZER_ANDROID
+   int cnt = 0;
+-  __res_state *statp = (__res_state*)state;
++  struct __res_state *statp = (struct __res_state*)state;
+   for (int i = 0; i < MAXNS && cnt < nfd; i++) {
+     if (statp->_u._ext.nsaddrs[i] && statp->_u._ext.nssocks[i] != -1)
+       fds[cnt++] = statp->_u._ext.nssocks[i];
diff --git a/src/patchsets/gcc/5.4.0/gentoo/README.history b/src/patchsets/gcc/5.4.0/gentoo/README.history
index ef6c8e64b7..7aec051291 100644
--- a/src/patchsets/gcc/5.4.0/gentoo/README.history
+++ b/src/patchsets/gcc/5.4.0/gentoo/README.history
@@ -1,3 +1,5 @@
+1.7		26 Oct 2017
+	+ 94_all_no-sigaltstack.patch
 1.6		26 Oct 2017
 	+ 93_all_ucontext-to-ucontext_t.patch
 1.5		24 Oct 2017