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-rw-r--r--src/client/linux/handler/exception_handler.h6
1 files changed, 5 insertions, 1 deletions
diff --git a/src/client/linux/handler/exception_handler.h b/src/client/linux/handler/exception_handler.h
index 1de38616..bb88b950 100644
--- a/src/client/linux/handler/exception_handler.h
+++ b/src/client/linux/handler/exception_handler.h
@@ -252,7 +252,11 @@ class ExceptionHandler {
MinidumpDescriptor minidump_descriptor_;
- HandlerCallback crash_handler_;
+ // Must be volatile. The compiler is unaware of the code which runs in
+ // the signal handler which reads this variable. Without volatile the
+ // compiler is free to optimise away writes to this variable which it
+ // believes are never read.
+ volatile HandlerCallback crash_handler_;
// The global exception handler stack. This is need becuase there may exist
// multiple ExceptionHandler instances in a process. Each will have itself