test: Pass bench exe into test framework utils

This teaches the test framework about the bench executable, which is
required for the next commit.

test/functional/test_framework/test_framework.py

@@ -943,6 +943,11 @@ class BitcoinTestFramework(metaclass=BitcoinTestMetaClass):
         if not self.is_bitcoin_chainstate_compiled():
             raise SkipTest("bitcoin-chainstate has not been compiled")
 
+    def skip_if_no_bitcoin_bench(self):
+        """Skip the running test if bench_bitcoin has not been compiled."""
+        if not self.is_bench_compiled():
+            raise SkipTest("bench_bitcoin has not been compiled")
+
     def skip_if_no_cli(self):
         """Skip the running test if bitcoin-cli has not been compiled."""
         if not self.is_cli_compiled():
@@ -976,6 +981,10 @@ class BitcoinTestFramework(metaclass=BitcoinTestMetaClass):
         if self.options.valgrind:
             raise SkipTest("This test is not compatible with Valgrind.")
 
+    def is_bench_compiled(self):
+        """Checks whether bench_bitcoin was compiled."""
+        return self.config["components"].getboolean("BUILD_BENCH")
+
     def is_cli_compiled(self):
         """Checks whether bitcoin-cli was compiled."""
         return self.config["components"].getboolean("ENABLE_CLI")

test/functional/test_framework/util.py

@@ -261,6 +261,10 @@ class Binaries:
         # Add -nonamed because "bitcoin rpc" enables -named by default, but bitcoin-cli doesn't
         return self._argv("rpc", self.paths.bitcoincli) + ["-nonamed"]
 
+    def bench_argv(self):
+        "Return argv array that should be used to invoke bench_bitcoin"
+        return self._argv("bench", self.paths.bitcoin_bench)
+
     def tx_argv(self):
         "Return argv array that should be used to invoke bitcoin-tx"
         return self._argv("tx", self.paths.bitcointx)
@@ -301,6 +305,7 @@ def get_binary_paths(config):
     binaries = {
         "bitcoin": "BITCOIN_BIN",
         "bitcoind": "BITCOIND",
+        "bench_bitcoin": "BITCOIN_BENCH",
         "bitcoin-cli": "BITCOINCLI",
         "bitcoin-util": "BITCOINUTIL",
         "bitcoin-tx": "BITCOINTX",