stub using feature flags

set cu consumed

program-runtime/Cargo.toml

@@ -58,3 +58,5 @@ frozen-abi = [
     "solana-sdk/frozen-abi",
 ]
 shuttle-test = ["solana-type-overrides/shuttle-test"]
+stub-proc-instr = []
+

program-runtime/src/invoke_context.rs

@@ -455,10 +455,18 @@ impl<'a> InvokeContext<'a> {
         timings: &mut ExecuteTimings,
     ) -> Result<(), InstructionError> {
         *compute_units_consumed = 0;
+
+        // Stub out the processing of the instruction
+        if cfg!(feature = "stub-proc-instr"){
+            eprintln!("Stubbing out processing of instruction");
+            return Ok(());
+        }
+
         self.transaction_context
             .get_next_instruction_context()?
             .configure(program_indices, instruction_accounts, instruction_data);
         self.push()?;
+
         self.process_executable_chain(compute_units_consumed, timings)
             // MUST pop if and only if `push` succeeded, independent of `result`.
             // Thus, the `.and()` instead of an `.and_then()`.