feat: pass FailState value to WasmVmIntegration::error() (#450)

* pass FailState value to WasmVmIntegration::error()

Signed-off-by: Rachel Green <[email protected]>

Author: rachgreen33

include/proxy-wasm/wasm_vm.h

@@ -143,12 +143,25 @@ enum class AbiVersion { ProxyWasm_0_1_0, ProxyWasm_0_2_0, ProxyWasm_0_2_1, Unkno
 
 class NullPlugin;
 
+enum class FailState : int {
+  Ok = 0,
+  UnableToCreateVm = 1,
+  UnableToCloneVm = 2,
+  MissingFunction = 3,
+  UnableToInitializeCode = 4,
+  StartFailed = 5,
+  ConfigureFailed = 6,
+  RuntimeError = 7,
+};
+
 // Integrator specific WasmVm operations.
 struct WasmVmIntegration {
   virtual ~WasmVmIntegration() {}
   virtual WasmVmIntegration *clone() = 0;
   virtual proxy_wasm::LogLevel getLogLevel() = 0;
   virtual void error(std::string_view message) = 0;
+  // Allow integrations to handle specific FailStates differently.
+  virtual void error(FailState fail_state, std::string_view message) { error(message); }
   virtual void trace(std::string_view message) = 0;
   // Get a NullVm implementation of a function.
   // @param function_name is the name of the function with the implementation specific prefix.
@@ -165,17 +178,6 @@ struct WasmVmIntegration {
                                  void *ptr_to_function_return) = 0;
 };
 
-enum class FailState : int {
-  Ok = 0,
-  UnableToCreateVm = 1,
-  UnableToCloneVm = 2,
-  MissingFunction = 3,
-  UnableToInitializeCode = 4,
-  StartFailed = 5,
-  ConfigureFailed = 6,
-  RuntimeError = 7,
-};
-
 // Wasm VM instance. Provides the low level WASM interface.
 class WasmVm {
 public:
@@ -308,14 +310,11 @@ class WasmVm {
    */
   virtual bool usesWasmByteOrder() = 0;
 
-  /**
-   * Warm the VM such as engine and runtime.
-   */
-  virtual void warm() = 0;
+  virtual void warm() {}
 
   bool isFailed() { return failed_ != FailState::Ok; }
   void fail(FailState fail_state, std::string_view message) {
-    integration()->error(message);
+    integration()->error(fail_state, message);
     failed_ = fail_state;
     for (auto &callback : fail_callbacks_) {
       callback(fail_state);