Environment variables support complete

Author: grendello

src/native/nativeaot/host/CMakeLists.txt

@@ -29,6 +29,7 @@ set(CLR_SOURCES_PATH "../../clr")
 set(XAMARIN_MONODROID_SOURCES
   bridge-processing.cc
   host.cc
+  host-environment.cc
   host-jni.cc
   internal-pinvoke-stubs.cc
 

src/native/nativeaot/host/host-environment.cc

@@ -0,0 +1,33 @@
+#include <cstdint>
+
+#include <host/host-environment.hh>
+#include <runtime-base/logger.hh>
+
+using namespace xamarin::android;
+
+struct AppEnvironmentVariable {
+	uint32_t name_index;
+	uint32_t value_index;
+};
+
+extern "C" {
+	extern const uint32_t __naot_android_app_environment_variable_count;
+	extern const AppEnvironmentVariable __naot_android_app_environment_variables[];
+	extern const char __naot_android_app_environment_variable_contents[];
+}
+
+void HostEnvironment::init () noexcept
+{
+	if (__naot_android_app_environment_variable_count == 0) {
+		return;
+	}
+
+	log_debug (LOG_DEFAULT, "Setting {} environment variables", __naot_android_app_environment_variable_count);
+	for (size_t i = 0; i < __naot_android_app_environment_variable_count; i++) {
+		AppEnvironmentVariable const& env_var = __naot_android_app_environment_variables[i];
+		const char *var_name = &__naot_android_app_environment_variable_contents[env_var.name_index];
+		const char *var_value = &__naot_android_app_environment_variable_contents[env_var.value_index];
+
+		set_variable (var_name, var_value);
+	}
+}

src/native/nativeaot/host/host.cc

@@ -1,5 +1,6 @@
 #include <host/bridge-processing.hh>
 #include <host/gc-bridge.hh>
+#include <host/host-environment.hh>
 #include <host/host-nativeaot.hh>
 #include <host/os-bridge.hh>
 #include <runtime-base/logger.hh>
@@ -20,6 +21,7 @@ extern "C" {
 auto HostCommon::Java_JNI_OnLoad (JavaVM *vm, void *reserved) noexcept -> jint
 {
 	Logger::init_logging_categories ();
+	HostEnvironment::init ();
 
 	log_warn (LOG_ASSEMBLY, "{}", __PRETTY_FUNCTION__);
 

src/native/nativeaot/include/host/host-environment.hh

@@ -0,0 +1,29 @@
+#pragma once
+
+#include <cerrno>
+#include <cstdlib>
+#include <cstring>
+#include <string_view>
+
+#include <runtime-base/logger.hh>
+
+namespace xamarin::android {
+	class HostEnvironment
+	{
+	public:
+		static void init () noexcept;
+
+		static void set_variable (const char *name, const char *value) noexcept
+		{
+			log_debug (LOG_DEFAULT, " Variable {} = '{}'", name, value);
+			if (::setenv (name, value, 1) < 0) {
+				log_warn (LOG_DEFAULT, "Failed to set environment variable '{}': {}", name, ::strerror (errno));
+			}
+		}
+
+		static void set_variable (std::string_view const& name, std::string_view const& value) noexcept
+		{
+			set_variable (name.data (), value.data ());
+		}
+	};
+}