Add GDB pretty printers for evmc_address, evmc_bytes32, evmc_bytes

.gdbinit

@@ -0,0 +1 @@
+source -v gdb_pretty_printers.py

gdb_pretty_printers.py

@@ -0,0 +1,67 @@
+import gdb
+
+EVMC_BYTES_TARGET_TYPES = [
+    "evmc::address",
+    "const evmc::address",
+    "evmc_address",
+    "const evmc_address",
+    "evmc::bytes32",
+    "const evmc::bytes32",
+    "evmc_bytes32",
+    "const evmc_bytes32",
+    "evmc_uint256be",
+    "const evmc_uint256be",
+    "evmc::uint256be",
+    "const evmc::uint256be",
+]
+
+
+class EvmcBytesPrinter:
+    def __init__(self, val):
+        self.val = val
+
+    def to_string(self):
+        start = self.val['bytes']
+        bytes_int = [int(start[i]) for i in range(start.type.range()[1] + 1)]
+        return "0x" + (''.join(f'{byte:02x}' for byte in bytes_int))
+
+
+# In CLion these are automatically overwritten by std::* pretty printers.
+# Reload this script manually (`source -v ../../gdb_pretty_printers.py`) to activate them again.
+STRING_TARGET_TYPES = [
+    "std::__cxx11::basic_string<unsigned char, evmc::byte_traits<unsigned char>, std::allocator<unsigned char> >",
+    "const std::__cxx11::basic_string<unsigned char, evmc::byte_traits<unsigned char>, std::allocator<unsigned char> >",
+]
+
+
+class StdBasicStringUint8Printer:
+    def __init__(self, val):
+        self.val = val
+
+    def to_string(self):
+        start = self.val['_M_dataplus']['_M_p']
+        length = self.val['_M_string_length']
+        content = [int(start[i]) for i in range(length)]
+        return '{%s}' % (', '.join(hex(byte) for byte in content))
+
+
+def register_printers(obj):
+    if obj == None:
+        obj = gdb
+    obj.pretty_printers.insert(0, lookup_function)
+
+
+def lookup_function(val):
+    type_str = str(val.type.strip_typedefs())
+    # print("lookup " + type_str) # uncomment to see exact type requested
+
+    if type_str in EVMC_BYTES_TARGET_TYPES:
+        return EvmcBytesPrinter(val)
+
+    if type_str in STRING_TARGET_TYPES:
+        return StdBasicStringUint8Printer(val)
+
+    return None
+
+
+register_printers(gdb.current_objfile())