[src/trunk]: src/external/gpl3/gcc/dist/libsanitizer/sanitizer_common Adapt s...

[kamil <kamil%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/a21f20d3747b
branches:  trunk
changeset: 938547:a21f20d3747b
user:      kamil <kamil%NetBSD.org@localhost>
date:      Fri Sep 11 01:07:00 2020 +0000

description:
Adapt stop-the-world for ptrace changes in NetBSD-9.99.30

Cherry-pick and adapt:

commit fc356dcc11c10003ff22acff667b0a9f5e6c1e0f
Author: Kamil Rytarowski <n54%gmx.com@localhost>
Date:   Tue Dec 24 20:33:54 2019 +0100

    [compiler-rt] Adapt stop-the-world for ptrace changes in NetBSD-9.99.30

    Handle PT_LWPNEXT for newer kernels and keep PT_LWPINFO for older ones.

diffstat:

 external/gpl3/gcc/dist/libsanitizer/sanitizer_common/sanitizer_stoptheworld_netbsd_libcdep.cc |  12 ++++++++-
 1 files changed, 10 insertions(+), 2 deletions(-)

diffs (24 lines):

diff -r e4172be6a9ea -r a21f20d3747b external/gpl3/gcc/dist/libsanitizer/sanitizer_common/sanitizer_stoptheworld_netbsd_libcdep.cc
--- a/external/gpl3/gcc/dist/libsanitizer/sanitizer_common/sanitizer_stoptheworld_netbsd_libcdep.cc     Fri Sep 11 01:05:28 2020 +0000
+++ b/external/gpl3/gcc/dist/libsanitizer/sanitizer_common/sanitizer_stoptheworld_netbsd_libcdep.cc     Fri Sep 11 01:07:00 2020 +0000
@@ -120,10 +120,18 @@
 
   VReport(2, "Attached to process %d.\n", pid_);
 
+#ifdef PT_LWPNEXT
+  struct ptrace_lwpstatus pl;
+  int op = PT_LWPNEXT;
+#else
   struct ptrace_lwpinfo pl;
+  int op = PT_LWPINFO;
+#endif
+
+  pl.pl_lwpid = 0;
+
   int val;
-  pl.pl_lwpid = 0;
-  while ((val = ptrace(PT_LWPINFO, pid_, (void *)&pl, sizeof(pl))) != -1 &&
+  while ((val = ptrace(op, pid_, (void *)&pl, sizeof(pl))) != -1 &&
          pl.pl_lwpid != 0) {
     suspended_threads_list_.Append(pl.pl_lwpid);
     VReport(2, "Appended thread %d in process %d.\n", pl.pl_lwpid, pid_);