feat(rust): add print! macro for logging into terminal

core/Makefile

@@ -158,7 +158,7 @@ build_firmware: templates build_cross ## build firmware with frozen modules
 	$(SCONS) CFLAGS="$(CFLAGS)" PRODUCTION="$(PRODUCTION)" TREZOR_MODEL="$(TREZOR_MODEL)" PYOPT="$(PYOPT)" BITCOIN_ONLY="$(BITCOIN_ONLY)" UI2="$(UI2)" $(FIRMWARE_BUILD_DIR)/firmware.bin
 
 build_unix: templates ## build unix port
-	$(SCONS) CFLAGS="$(CFLAGS)" $(UNIX_BUILD_DIR)/trezor-emu-core $(UNIX_PORT_OPTS) TREZOR_MODEL="$(TREZOR_MODEL)" BITCOIN_ONLY="$(BITCOIN_ONLY)" TREZOR_EMULATOR_ASAN="$(ADDRESS_SANITIZER)" UI2="$(UI2)"
+	$(SCONS) CFLAGS="$(CFLAGS)" $(UNIX_BUILD_DIR)/trezor-emu-core $(UNIX_PORT_OPTS) TREZOR_MODEL="$(TREZOR_MODEL)" PYOPT="0" BITCOIN_ONLY="$(BITCOIN_ONLY)" TREZOR_EMULATOR_ASAN="$(ADDRESS_SANITIZER)" UI2="$(UI2)"
 
 build_unix_frozen: templates build_cross ## build unix port with frozen modules
 	$(SCONS) CFLAGS="$(CFLAGS)" $(UNIX_BUILD_DIR)/trezor-emu-core $(UNIX_PORT_OPTS) TREZOR_MODEL="$(TREZOR_MODEL)" PYOPT="$(PYOPT)" BITCOIN_ONLY="$(BITCOIN_ONLY)" TREZOR_EMULATOR_ASAN="$(ADDRESS_SANITIZER)" UI2="$(UI2)" TREZOR_MEMPERF="$(TREZOR_MEMPERF)" TREZOR_EMULATOR_FROZEN=1

core/SConscript.unix

@@ -671,7 +671,7 @@ def cargo_build():
     if UI2:
         features.append('ui')
         if PYOPT == '0':
-            features.append('ui_debug')
+            features.append('debug')
 
     return f'cd embed/rust; cargo build --profile {RUST_PROFILE} --target-dir=../../build/unix/rust --no-default-features --features "{" ".join(features)}"'
 

core/embed/rust/Cargo.toml

@@ -18,6 +18,7 @@ ui_debug = []
 buttons = []
 touch = []
 clippy = []
+debug = ["ui_debug"]
 test = ["cc", "glob", "micropython", "protobuf", "ui", "ui_debug"]
 
 [lib]

core/embed/rust/build.rs

@@ -196,6 +196,9 @@ fn generate_micropython_bindings() {
         // time
         .allowlist_function("mp_hal_ticks_ms")
         .allowlist_function("mp_hal_delay_ms")
+        // debug
+        .allowlist_function("mp_print_strn")
+        .allowlist_var("mp_plat_print")
         // typ
         .allowlist_var("mp_type_type")
         // module

core/embed/rust/src/micropython/macros.rs

@@ -204,3 +204,27 @@ macro_rules! obj_module {
         obj_module!($($key => $val),*)
     });
 }
+
+/// Print arbitrary amounts of slices into a terminal.
+/// Does not include a newline at the end.
+/// Does not do anything when not in debugging mode.
+#[allow(unused_macros)] // Should be used only for debugging purposes
+macro_rules! print {
+    ($($string:expr),+) => {
+        #[cfg(feature = "debug")]
+        {
+            $(crate::micropython::print::print($string);)+
+        }
+    }
+}
+
+/// Print arbitrary amounts of slices into a terminal.
+/// Includes a newline at the end.
+/// Does not do anything when not in debugging mode.
+#[allow(unused_macros)] // Should be used only for debugging purposes
+macro_rules! println {
+    ($($string:expr),+) => {
+        // Just delegating to print! and adding a newline
+        print!($($string),+, "\n");
+    }
+}

core/embed/rust/src/micropython/mod.rs

@@ -12,6 +12,7 @@ pub mod list;
 pub mod map;
 pub mod module;
 pub mod obj;
+pub mod print;
 pub mod qstr;
 pub mod runtime;
 pub mod time;

core/embed/rust/src/micropython/print.rs

@@ -0,0 +1,16 @@
+use super::ffi;
+
+/// Print a slice into emulator console.
+/// Is being '\0' terminated automatically.
+pub fn print(to_log: &str) {
+    unsafe {
+        ffi::mp_print_strn(
+            &ffi::mp_plat_print,
+            to_log.as_ptr() as _,
+            to_log.len(),
+            0,
+            '\0' as _,
+            0,
+        );
+    }
+}