[lldb-dev] [Bug 40588] New: NativeProcessLinux::MonitorCallback incorrectly logs value of libc "signal" function

via lldb-dev lldb-dev at lists.llvm.org
Mon Feb 4 07:44:41 PST 2019


            Bug ID: 40588
           Summary: NativeProcessLinux::MonitorCallback incorrectly logs
                    value of libc "signal" function
           Product: lldb
           Version: unspecified
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: P
         Component: All Bugs
          Assignee: lldb-dev at lists.llvm.org
          Reporter: jcowgill+llvm at jcowgill.uk
                CC: llvm-bugs at lists.llvm.org

In commit 4d99ca2308f9 ("Add pretty-printer for wait(2) statuses and modernize
the code handling them"), the "signal" parameter was removed from
NativeProcessLinux::MonitorCallback. Unfortunately not all uses of this
parameter were removed and as a result these uses now refer to the "signal"
function from libc which is probably unintended!

Both users are debug logging calls.

Call 1:
 LLDB_LOG(log, "got exit signal({0}) , tid = {1} ({2} main thread)", signal,
          pid, is_main_thread ? "is" : "is not");

Call 2:
          "GetSignalInfo failed: {0}, tid = {1}, signal = {2}, "
          "status = {3}, main_thread = {4}, thread_found: {5}",
          info_err, pid, signal, status, is_main_thread, thread_found);

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