update: adapt code to multi-platform builds

Co-authored-by: Rohith Raju <rohithraju488@gmail.com>
Signed-off-by: Jason Dellaluce <jasondellaluce@gmail.com>

userspace/engine/CMakeLists.txt

@@ -29,6 +29,10 @@ set(FALCO_ENGINE_SOURCE_FILES
 
 add_library(falco_engine STATIC ${FALCO_ENGINE_SOURCE_FILES})
 
+if (EMSCRIPTEN)
+	target_compile_options(falco_engine PRIVATE "-sDISABLE_EXCEPTION_CATCHING=0")
+endif()
+
 add_dependencies(falco_engine yamlcpp njson)
 
 if(MINIMAL_BUILD)

userspace/engine/evttype_index_ruleset.cpp

@@ -204,7 +204,11 @@ void evttype_index_ruleset::add(
 		wrap->filter = filter;
 		if(rule.source == falco_common::syscall_source)
 		{
+#ifdef __linux__
 			wrap->sc_codes = libsinsp::filter::ast::ppm_sc_codes(condition.get());
+#else
+			wrap->sc_codes = { };
+#endif
 			wrap->event_codes = libsinsp::filter::ast::ppm_event_codes(condition.get());
 		}
 		else

userspace/engine/falco_engine.cpp

@@ -769,7 +769,10 @@ void falco_engine::get_json_evt_types(libsinsp::filter::ast::expr* ast,
 {
 	output = Json::arrayValue;
 	auto evtcodes = libsinsp::filter::ast::ppm_event_codes(ast);
+	libsinsp::events::set<ppm_sc_code> syscodes;
+#ifdef __linux__
 	auto syscodes = libsinsp::filter::ast::ppm_sc_codes(ast);
+#endif
 	auto syscodes_to_evt_names = libsinsp::events::sc_set_to_event_names(syscodes);
 	auto evtcodes_to_evt_names = libsinsp::events::event_set_to_names(evtcodes, false);
 	for (const auto& n : unordered_set_union(syscodes_to_evt_names, evtcodes_to_evt_names))

userspace/engine/indexed_vector.h

@@ -16,7 +16,6 @@ limitations under the License.
 
 #pragma once
 
-#include <map>
 #include <string>
 #include <vector>
 #include <unordered_map>