[LLDB][MIPS] Hardware Watchpoints for MIPS

Reviewers: clayborg, jingham.
Subscribers: jaydeep, bhushan, dsanders, sagar, lldb-commits.
Differential Revision: http://reviews.llvm.org/D9142

llvm-svn: 239991

1 files changed, 21 insertions, 0 deletions

diff --git a/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp b/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp
index f6cefa9e001..be07b436580 100644
--- a/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp
+++ b/lldb/source/Plugins/Process/Linux/NativeProcessLinux.cpp
@@ -2011,6 +2011,27 @@ NativeProcessLinux::MonitorSIGTRAP(const siginfo_t *info, lldb::pid_t pid)
         break;
 
     case SI_KERNEL:
+#if defined __mips__
+        // For mips there is no special signal for watchpoint
+        // So we check for watchpoint in kernel trap
+        if (thread_sp)
+        {
+            // If a watchpoint was hit, report it
+            uint32_t wp_index;
+            Error error = thread_sp->GetRegisterContext()->GetWatchpointHitIndex(wp_index, NULL);
+            if (error.Fail() && log)
+                log->Printf("NativeProcessLinux::%s() "
+                            "received error while checking for watchpoint hits, "
+                            "pid = %" PRIu64 " error = %s",
+                            __FUNCTION__, pid, error.AsCString());
+            if (wp_index != LLDB_INVALID_INDEX32)
+            {
+                MonitorWatchpoint(pid, thread_sp, wp_index);
+                break;
+            }
+        }
+        // NO BREAK
+#endif
     case TRAP_BRKPT:
         MonitorBreakpoint(pid, thread_sp);
         break;