[llvm-branch-commits] [sanitizer] VReport thread status for failed PTRACE_ATTACH (PR #111901)

[Florian Mayer via llvm-branch-commits]

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@@ -148,6 +148,14 @@ bool ThreadSuspender::SuspendThread(tid_t tid) {
     // Log this event and move on.
     VReport(1, "Could not attach to thread %zu (errno %d).\n", (uptr)tid,
             pterrno);
+    if (common_flags()->verbosity >= 2) {
+      InternalScopedString path;
+      path.AppendF("/proc/%d/task/%llu/status", pid_, tid);
+      InternalMmapVector<char> buffer;
+      ReadFileToVector(path.data(), &buffer);
+      buffer.push_back(0);
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fmayer wrote:

nit: '\0'

https://github.com/llvm/llvm-project/pull/111901