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-rw-r--r--lldb/source/Plugins/Process/Linux/NativeRegisterContextLinux_x86_64.cpp3
1 files changed, 3 insertions, 0 deletions
diff --git a/lldb/source/Plugins/Process/Linux/NativeRegisterContextLinux_x86_64.cpp b/lldb/source/Plugins/Process/Linux/NativeRegisterContextLinux_x86_64.cpp
index a7390f58713..2ce822043af 100644
--- a/lldb/source/Plugins/Process/Linux/NativeRegisterContextLinux_x86_64.cpp
+++ b/lldb/source/Plugins/Process/Linux/NativeRegisterContextLinux_x86_64.cpp
@@ -1018,6 +1018,9 @@ NativeRegisterContextLinux_x86_64::SetHardwareWatchpointWithIndex(
if (wp_index >= NumSupportedHardwareWatchpoints())
return Error ("Watchpoint index out of range");
+ if (watch_flags == 0x2)
+ return Error ("Read watchpoints currently unsupported on x86_64 architecture");
+
if (watch_flags != 0x1 && watch_flags != 0x3)
return Error ("Invalid read/write bits for watchpoint");
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