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[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.
This commit is contained in:
Kamil Rytarowski 2019-12-24 20:33:54 +01:00
parent c06e53119b
commit fc356dcc11
1 changed files with 10 additions and 2 deletions
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12
compiler-rt/lib/sanitizer_common/sanitizer_stoptheworld_netbsd_libcdep.cpp
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@ -120,10 +120,18 @@ bool ThreadSuspender::SuspendAllThreads() {
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 val;
int op = PT_LWPINFO;
#endif
pl.pl_lwpid = 0;
while ((val = ptrace(PT_LWPINFO, pid_, (void *)&pl, sizeof(pl))) != -1 &&
int val;
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_);