gdb: clear step over information on thread exit (PR gdb/27338)

[binutils-gdb.git] / gdb / gdbarch-gen.h

diff --git a/gdb/gdbarch-gen.h b/gdb/gdbarch-gen.h
index 1d169c6e4f46559287c7322176ec60c1487edbb7..9f468bd1f61842332d771354e5113d7d9afad6cc 100644 (file)
--- a/gdb/gdbarch-gen.h
+++ b/gdb/gdbarch-gen.h
@@ -1138,7 +1138,11 @@ typedef displaced_step_prepare_status (gdbarch_displaced_step_prepare_ftype) (st
 extern displaced_step_prepare_status gdbarch_displaced_step_prepare (struct gdbarch *gdbarch, thread_info *thread, CORE_ADDR &displaced_pc);
 extern void set_gdbarch_displaced_step_prepare (struct gdbarch *gdbarch, gdbarch_displaced_step_prepare_ftype *displaced_step_prepare);
 
-/* Clean up after a displaced step of THREAD. */
+/* Clean up after a displaced step of THREAD.
+
+   It is possible for the displaced-stepped instruction to have caused
+   the thread to exit.  The implementation can detect this case by
+   checking if WS.kind is TARGET_WAITKIND_THREAD_EXITED. */
 
 typedef displaced_step_finish_status (gdbarch_displaced_step_finish_ftype) (struct gdbarch *gdbarch, thread_info *thread, const target_waitstatus &ws);
 extern displaced_step_finish_status gdbarch_displaced_step_finish (struct gdbarch *gdbarch, thread_info *thread, const target_waitstatus &ws);