[Bug tdep/29868] [gdb/tdep, s390x] breakpoint.c:5784: internal-error: bpstat_stop_status_nowatch: Assertion `!target_stopped_by_watchpoint ()'

["vries at gcc dot gnu.org" <sourceware-bugzilla@sourceware.org>]

https://sourceware.org/bugzilla/show_bug.cgi?id=29868

--- Comment #4 from Tom de Vries <vries at gcc dot gnu.org> ---
I found this bit of code in aarch64_linux_nat_target::stopped_data_address:
...
diff --git a/gdb/s390-linux-nat.c b/gdb/s390-linux-nat.c
index 96833e804e9..02b797e422f 100644
--- a/gdb/s390-linux-nat.c
+++ b/gdb/s390-linux-nat.c
@@ -673,6 +673,13 @@ s390_linux_nat_target::stopped_by_watchpoint ()
   if (state->watch_areas.empty ())
     return false;

+  siginfo_t siginfo;
+  if (!linux_nat_get_siginfo (inferior_ptid, &siginfo))
+    return false;
+  if (siginfo.si_signo != SIGTRAP
+      || (siginfo.si_code & 0xffff) != TRAP_HWBKPT)
+    return false;
+
   parea.len = sizeof (per_lowcore);
   parea.process_addr = (addr_t) & per_lowcore;
   parea.kernel_addr = offsetof (struct user_regs_struct, per_info.lowcore);
...
and it fixes the test-case.

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