Expose install_fatal_error_handler() through the C API.

I expose the API with some caveats:

- The C++ API involves a traditional void* opaque pointer for the fatal 
error callback.  The C API doesn’t do this.  I don’t think that the void* 
opaque pointer makes any sense since this is a global callback - there will 
only be one of them.  So if you need to pass some data to your callback, 
just put it in a global variable.

- The bindings will ignore the gen_crash_diag boolean.  I ignore it because 
(1) I don’t know what it does, (2) it’s not documented AFAIK, and (3) I 
couldn’t imagine any use for it.  I made the gut call that it probably 
wasn’t important enough to expose through the C API.

llvm-svn: 192864

1 files changed, 16 insertions, 0 deletions

diff --git a/llvm/include/llvm-c/Core.h b/llvm/include/llvm-c/Core.h
index d39128db1a6..f9717cc5f55 100644
--- a/llvm/include/llvm-c/Core.h
+++ b/llvm/include/llvm-c/Core.h
@@ -416,6 +416,22 @@ void LLVMShutdown();
 char *LLVMCreateMessage(const char *Message);
 void LLVMDisposeMessage(char *Message);
 
+typedef void (*LLVMFatalErrorHandler)(const char *Reason);
+
+/**
+ * Install a fatal error handler. By default, if LLVM detects a fatal error, it
+ * will call exit(1). This may not be appropriate in many contexts. For example,
+ * doing exit(1) will bypass many crash reporting/tracing system tools. This
+ * function allows you to install a callback that will be invoked prior to the
+ * call to exit(1).
+ */
+void LLVMInstallFatalErrorHandler(LLVMFatalErrorHandler Handler);
+
+/**
+ * Reset the fatal error handler. This resets LLVM's fatal error handling
+ * behavior to the default.
+ */
+void LLVMResetFatalErrorHandler(void);
 
 /**
  * @defgroup LLVMCCoreContext Contexts