Get tests passing

Add roc_dbg to some platforms.
Also start updating some roc_panic impls.

crates/cli/tests/cli_run.rs

@@ -562,11 +562,11 @@ mod cli_run {
                 x : Num *
                 x = 42
 
-                [<ignored for tests> 19:9] 42
-                [<ignored for tests> 20:9] "Fjoer en ferdjer frieten oan dyn geve lea"
-                [<ignored for tests> 13:9] "abc"
-                [<ignored for tests> 13:9] 10
-                [<ignored for tests> 13:9] A (B C)
+                [#UserApp] 42
+                [#UserApp] "Fjoer en ferdjer frieten oan dyn geve lea"
+                [#UserApp] "abc"
+                [#UserApp] 10
+                [#UserApp] (A (B C))
                 Program finished!
                 "#
             ),

crates/cli/tests/fixtures/packages/platform/host.zig

@@ -38,15 +38,19 @@ export fn roc_memset(dst: [*]u8, value: i32, size: usize) callconv(.C) void {
     return memset(dst, value, size);
 }
 
-export fn roc_panic(c_ptr: *anyopaque, tag_id: u32) callconv(.C) void {
+export fn roc_panic(msg: *RocStr, tag_id: u32) callconv(.C) void {
     _ = tag_id;
 
     const stderr = std.io.getStdErr().writer();
-    const msg = @as([*:0]const u8, @ptrCast(c_ptr));
-    stderr.print("Application crashed with message\n\n    {s}\n\nShutting down\n", .{msg}) catch unreachable;
+    stderr.print("Application crashed with message\n\n    {s}\n\nShutting down\n", .{msg.asSlice()}) catch unreachable;
     std.process.exit(0);
 }
 
+export fn roc_dbg(loc: *RocStr, msg: *RocStr) callconv(.C) void {
+    const stderr = std.io.getStdErr().writer();
+    stderr.print("[{s}] {s}\n", .{ loc.asSlice(), msg.asSlice() }) catch unreachable;
+}
+
 extern fn kill(pid: c_int, sig: c_int) c_int;
 extern fn shm_open(name: *const i8, oflag: c_int, mode: c_uint) c_int;
 extern fn mmap(addr: ?*anyopaque, length: c_uint, prot: c_int, flags: c_int, fd: c_int, offset: c_uint) *anyopaque;

crates/cli_testing_examples/algorithms/fibonacci-platform/host.zig

@@ -1,5 +1,7 @@
 const std = @import("std");
 const builtin = @import("builtin");
+const str = @import("glue").str;
+const RocStr = str.RocStr;
 const testing = std.testing;
 const expectEqual = testing.expectEqual;
 const expect = testing.expect;
@@ -50,13 +52,17 @@ export fn roc_dealloc(c_ptr: *anyopaque, alignment: u32) callconv(.C) void {
     free(@as([*]align(Align) u8, @alignCast(@ptrCast(c_ptr))));
 }
 
-export fn roc_panic(c_ptr: *anyopaque, tag_id: u32) callconv(.C) void {
+export fn roc_panic(msg: *RocStr, tag_id: u32) callconv(.C) void {
     _ = tag_id;
 
     const stderr = std.io.getStdErr().writer();
-    const msg = @as([*:0]const u8, @ptrCast(c_ptr));
-    stderr.print("Application crashed with message\n\n    {s}\n\nShutting down\n", .{msg}) catch unreachable;
-    std.process.exit(0);
+    stderr.print("Application crashed with message\n\n    {s}\n\nShutting down\n", .{msg.asSlice()}) catch unreachable;
+    std.process.exit(1);
+}
+
+export fn roc_dbg(loc: *RocStr, msg: *RocStr) callconv(.C) void {
+    const stderr = std.io.getStdErr().writer();
+    stderr.print("[{s}] {s}\n", .{ loc.asSlice(), msg.asSlice() }) catch unreachable;
 }
 
 export fn roc_memset(dst: [*]u8, value: i32, size: usize) callconv(.C) void {

crates/cli_testing_examples/benchmarks/platform/host.zig

@@ -54,13 +54,17 @@ export fn roc_dealloc(c_ptr: *anyopaque, alignment: u32) callconv(.C) void {
     free(@as([*]align(Align) u8, @alignCast(@ptrCast(c_ptr))));
 }
 
-export fn roc_panic(c_ptr: *anyopaque, tag_id: u32) callconv(.C) void {
+export fn roc_panic(msg: *RocStr, tag_id: u32) callconv(.C) void {
     _ = tag_id;
 
     const stderr = std.io.getStdErr().writer();
-    const msg = @as([*:0]const u8, @ptrCast(c_ptr));
-    stderr.print("Application crashed with message\n\n    {s}\n\nShutting down\n", .{msg}) catch unreachable;
-    std.process.exit(0);
+    stderr.print("Application crashed with message\n\n    {s}\n\nShutting down\n", .{msg.asSlice()}) catch unreachable;
+    std.process.exit(1);
+}
+
+export fn roc_dbg(loc: *RocStr, msg: *RocStr) callconv(.C) void {
+    const stderr = std.io.getStdErr().writer();
+    stderr.print("[{s}] {s}\n", .{ loc.asSlice(), msg.asSlice() }) catch unreachable;
 }
 
 export fn roc_memset(dst: [*]u8, value: i32, size: usize) callconv(.C) void {

crates/cli_testing_examples/expects/zig-platform/host.zig

@@ -44,13 +44,18 @@ export fn roc_dealloc(c_ptr: *anyopaque, alignment: u32) callconv(.C) void {
     free(@as([*]align(Align) u8, @alignCast(@ptrCast(c_ptr))));
 }
 
-export fn roc_panic(c_ptr: *anyopaque, tag_id: u32) callconv(.C) void {
+export fn roc_panic(msg: *RocStr, tag_id: u32) callconv(.C) void {
     _ = tag_id;
 
     const stderr = std.io.getStdErr().writer();
-    const msg = @as([*:0]const u8, @ptrCast(c_ptr));
-    stderr.print("Application crashed with message\n\n    {s}\n\nShutting down\n", .{msg}) catch unreachable;
-    std.process.exit(0);
+    stderr.print("Application crashed with message\n\n    {s}\n\nShutting down\n", .{msg.asSlice()}) catch unreachable;
+    std.process.exit(1);
+}
+
+export fn roc_dbg(loc: *RocStr, msg: *RocStr) callconv(.C) void {
+    // This platform uses stdout for testing purposes instead of the normal stderr.
+    const stdout = std.io.getStdOut().writer();
+    stdout.print("[{s}] {s}\n", .{ loc.asSlice(), msg.asSlice() }) catch unreachable;
 }
 
 export fn roc_memset(dst: [*]u8, value: i32, size: usize) callconv(.C) void {

crates/compiler/gen_dev/src/lib.rs

@@ -57,6 +57,14 @@ impl AssemblyBackendMode {
             AssemblyBackendMode::Repl => true,
         }
     }
+
+    fn generate_roc_dbg(self) -> bool {
+        match self {
+            AssemblyBackendMode::Binary => false,
+            AssemblyBackendMode::Test => true,
+            AssemblyBackendMode::Repl => true,
+        }
+    }
 }
 
 pub struct Env<'a> {

crates/compiler/gen_dev/src/object_builder.rs

@@ -296,6 +296,23 @@ fn generate_roc_panic<'a, B: Backend<'a>>(backend: &mut B, output: &mut Object)
     }
 }
 
+fn generate_roc_dbg<'a, B: Backend<'a>>(_backend: &mut B, output: &mut Object) {
+    let text_section = output.section_id(StandardSection::Text);
+    let proc_symbol = Symbol {
+        name: "roc_dbg".as_bytes().to_vec(),
+        value: 0,
+        size: 0,
+        kind: SymbolKind::Text,
+        scope: SymbolScope::Dynamic,
+        weak: false,
+        section: SymbolSection::Section(text_section),
+        flags: SymbolFlags::None,
+    };
+    let _proc_id = output.add_symbol(proc_symbol);
+    // TODO: Actually generate an impl instead of just an empty symbol.
+    // At a minimum, it should just be a ret.
+}
+
 fn generate_wrapper<'a, B: Backend<'a>>(
     backend: &mut B,
     output: &mut Object,
@@ -412,6 +429,10 @@ fn build_object<'a, B: Backend<'a>>(
         generate_longjmp(&mut backend, &mut output);
     }
 
+    if backend.env().mode.generate_roc_dbg() {
+        generate_roc_dbg(&mut backend, &mut output);
+    }
+
     if backend.env().mode.generate_allocators() {
         generate_wrapper(
             &mut backend,

crates/compiler/gen_llvm/src/llvm/externs.rs

@@ -160,6 +160,9 @@ pub fn add_default_roc_externs(env: &Env<'_, '_, '_>) {
             }
         }
 
+        // TODO: generate a valid impl of dbg here.
+        unreachable_function(env, "roc_dbg");
+
         match env.target_info.operating_system {
             roc_target::OperatingSystem::Windows => {
                 // We don't need these functions on Windows

crates/compiler/test_gen/src/helpers/wasm_test_platform.c

@@ -132,6 +132,8 @@ void roc_panic(void* msg, unsigned int panic_tag)
     exit(101);
 }
 
+void roc_debug(void* loc, void* msg) {}
+
 //--------------------------
 
 void *roc_memset(void *str, int c, size_t n)

crates/compiler/test_mono/generated/dbg_in_expect.txt

@@ -2,8 +2,48 @@ procedure Bool.2 ():
     let Bool.23 : Int1 = true;
     ret Bool.23;
 
+procedure Inspect.249 (Inspect.250, Inspect.248):
+    let Inspect.323 : Str = "\"";
+    let Inspect.322 : Str = CallByName Inspect.61 Inspect.250 Inspect.323;
+    let Inspect.318 : Str = CallByName Inspect.61 Inspect.322 Inspect.248;
+    let Inspect.319 : Str = "\"";
+    let Inspect.317 : Str = CallByName Inspect.61 Inspect.318 Inspect.319;
+    ret Inspect.317;
+
+procedure Inspect.30 (Inspect.147):
+    ret Inspect.147;
+
+procedure Inspect.35 (Inspect.300):
+    ret Inspect.300;
+
+procedure Inspect.36 (Inspect.304):
+    let Inspect.311 : Str = "";
+    ret Inspect.311;
+
+procedure Inspect.44 (Inspect.248):
+    let Inspect.313 : Str = CallByName Inspect.30 Inspect.248;
+    ret Inspect.313;
+
+procedure Inspect.5 (Inspect.150):
+    let Inspect.312 : Str = CallByName Inspect.44 Inspect.150;
+    let Inspect.309 : {} = Struct {};
+    let Inspect.308 : Str = CallByName Inspect.36 Inspect.309;
+    let Inspect.307 : Str = CallByName Inspect.249 Inspect.308 Inspect.312;
+    ret Inspect.307;
+
+procedure Inspect.61 (Inspect.303, Inspect.298):
+    let Inspect.321 : Str = CallByName Str.3 Inspect.303 Inspect.298;
+    dec Inspect.298;
+    ret Inspect.321;
+
+procedure Str.3 (#Attr.2, #Attr.3):
+    let Str.292 : Str = lowlevel StrConcat #Attr.2 #Attr.3;
+    ret Str.292;
+
 procedure Test.1 ():
-    let Test.0 : Str = "";
+    let Test.5 : Str = "";
+    let Test.4 : Str = CallByName Inspect.5 Test.5;
+    let Test.0 : Str = CallByName Inspect.35 Test.4;
     dbg Test.0;
     dec Test.0;
     let Test.3 : Int1 = CallByName Bool.2;

crates/compiler/test_mono/generated/dbg_str_followed_by_number.txt

@@ -1,5 +1,45 @@
+procedure Inspect.249 (Inspect.250, Inspect.248):
+    let Inspect.323 : Str = "\"";
+    let Inspect.322 : Str = CallByName Inspect.61 Inspect.250 Inspect.323;
+    let Inspect.318 : Str = CallByName Inspect.61 Inspect.322 Inspect.248;
+    let Inspect.319 : Str = "\"";
+    let Inspect.317 : Str = CallByName Inspect.61 Inspect.318 Inspect.319;
+    ret Inspect.317;
+
+procedure Inspect.30 (Inspect.147):
+    ret Inspect.147;
+
+procedure Inspect.35 (Inspect.300):
+    ret Inspect.300;
+
+procedure Inspect.36 (Inspect.304):
+    let Inspect.311 : Str = "";
+    ret Inspect.311;
+
+procedure Inspect.44 (Inspect.248):
+    let Inspect.313 : Str = CallByName Inspect.30 Inspect.248;
+    ret Inspect.313;
+
+procedure Inspect.5 (Inspect.150):
+    let Inspect.312 : Str = CallByName Inspect.44 Inspect.150;
+    let Inspect.309 : {} = Struct {};
+    let Inspect.308 : Str = CallByName Inspect.36 Inspect.309;
+    let Inspect.307 : Str = CallByName Inspect.249 Inspect.308 Inspect.312;
+    ret Inspect.307;
+
+procedure Inspect.61 (Inspect.303, Inspect.298):
+    let Inspect.321 : Str = CallByName Str.3 Inspect.303 Inspect.298;
+    dec Inspect.298;
+    ret Inspect.321;
+
+procedure Str.3 (#Attr.2, #Attr.3):
+    let Str.292 : Str = lowlevel StrConcat #Attr.2 #Attr.3;
+    ret Str.292;
+
 procedure Test.0 ():
-    let Test.1 : Str = "";
+    let Test.4 : Str = "";
+    let Test.3 : Str = CallByName Inspect.5 Test.4;
+    let Test.1 : Str = CallByName Inspect.35 Test.3;
     dbg Test.1;
     dec Test.1;
     let Test.2 : I64 = 42i64;

crates/compiler/uitest/tests/solve/constrain_dbg_flex_var.txt

@@ -1,7 +1,7 @@
 app "test" provides [main] to "./platform"
 
 polyDbg = \x ->
-#^^^^^^^{-1} a -[[polyDbg(1)]]-> a
+#^^^^^^^{-1} val -[[polyDbg(1)]]-> val where val implements Inspect
     dbg x
     x
 

crates/roc_std/src/lib.rs

@@ -36,6 +36,7 @@ extern "C" {
     ) -> *mut c_void;
     pub fn roc_dealloc(ptr: *mut c_void, alignment: u32);
     pub fn roc_panic(c_ptr: *mut c_void, tag_id: u32);
+    pub fn roc_dbg(loc: *mut c_void, msg: *mut c_void);
     pub fn roc_memset(dst: *mut c_void, c: i32, n: usize) -> *mut c_void;
 }
 

crates/roc_std/tests/test_roc_std.rs

@@ -32,18 +32,14 @@ pub unsafe extern "C" fn roc_dealloc(c_ptr: *mut c_void, _alignment: u32) {
 
 #[cfg(test)]
 #[no_mangle]
-pub unsafe extern "C" fn roc_panic(c_ptr: *mut c_void, tag_id: u32) {
-    use std::ffi::CStr;
-    use std::os::raw::c_char;
+pub unsafe extern "C" fn roc_panic(msg: *mut roc_std::RocStr, _tag_id: u32) {
+    panic!("roc_panic during test: {}", &*msg);
+}
 
-    match tag_id {
-        0 => {
-            let c_str = CStr::from_ptr(c_ptr as *const c_char);
-            let string = c_str.to_str().unwrap();
-            panic!("roc_panic during test: {string}");
-        }
-        _ => todo!(),
-    }
+#[cfg(test)]
+#[no_mangle]
+pub unsafe extern "C" fn roc_dbg(loc: *mut roc_std::RocStr, msg: *mut roc_std::RocStr) {
+    eprintln!("[{}] {}", &*loc, &*msg);
 }
 
 #[cfg(test)]

crates/valgrind/zig-platform/host.zig

@@ -44,13 +44,17 @@ export fn roc_dealloc(c_ptr: *anyopaque, alignment: u32) callconv(.C) void {
     free(@as([*]align(Align) u8, @alignCast(@ptrCast(c_ptr))));
 }
 
-export fn roc_panic(c_ptr: *anyopaque, tag_id: u32) callconv(.C) void {
+export fn roc_panic(msg: *RocStr, tag_id: u32) callconv(.C) void {
     _ = tag_id;
 
     const stderr = std.io.getStdErr().writer();
-    const msg = @as([*:0]const u8, @ptrCast(c_ptr));
-    stderr.print("Application crashed with message\n\n    {s}\n\nShutting down\n", .{msg}) catch unreachable;
-    std.process.exit(0);
+    stderr.print("Application crashed with message\n\n    {s}\n\nShutting down\n", .{msg.asSlice()}) catch unreachable;
+    std.process.exit(1);
+}
+
+export fn roc_dbg(loc: *RocStr, msg: *RocStr) callconv(.C) void {
+    const stderr = std.io.getStdErr().writer();
+    stderr.print("[{s}] {s}\n", .{ loc.asSlice(), msg.asSlice() }) catch unreachable;
 }
 
 export fn roc_memset(dst: [*]u8, value: i32, size: usize) callconv(.C) void {

examples/platform-switching/zig-platform/host.zig

@@ -44,15 +44,19 @@ export fn roc_dealloc(c_ptr: *anyopaque, alignment: u32) callconv(.C) void {
     free(@as([*]align(Align) u8, @alignCast(@ptrCast(c_ptr))));
 }
 
-export fn roc_panic(c_ptr: *anyopaque, tag_id: u32) callconv(.C) void {
+export fn roc_panic(msg: *RocStr, tag_id: u32) callconv(.C) void {
     _ = tag_id;
 
     const stderr = std.io.getStdErr().writer();
-    const msg = @as([*:0]const u8, @ptrCast(c_ptr));
-    stderr.print("Application crashed with message\n\n    {s}\n\nShutting down\n", .{msg}) catch unreachable;
+    stderr.print("Application crashed with message\n\n    {s}\n\nShutting down\n", .{msg.asSlice()}) catch unreachable;
     std.process.exit(0);
 }
 
+export fn roc_dbg(loc: *RocStr, msg: *RocStr) callconv(.C) void {
+    const stderr = std.io.getStdErr().writer();
+    stderr.print("[{s}] {s}\n", .{ loc.asSlice(), msg.asSlice() }) catch unreachable;
+}
+
 export fn roc_memset(dst: [*]u8, value: i32, size: usize) callconv(.C) void {
     return memset(dst, value, size);
 }

examples/static-site-gen/platform/src/lib.rs

@@ -86,16 +86,22 @@ pub extern "C" fn rust_main() -> i32 {
 }
 
 #[no_mangle]
-pub unsafe extern "C" fn roc_panic(c_ptr: *mut c_void, tag_id: u32) {
+pub unsafe extern "C" fn roc_panic(msg: *mut RocStr, tag_id: u32) {
     match tag_id {
         0 => {
-            let slice = CStr::from_ptr(c_ptr as *const c_char);
-            let string = slice.to_str().unwrap();
-            eprintln!("Roc hit a panic: {}", string);
-            std::process::exit(1);
+            eprintln!("Roc standard library hit a panic: {}", &*msg);
         }
-        _ => todo!(),
+        1 => {
+            eprintln!("Application hit a panic: {}", &*msg);
+        }
+        _ => unreachable!(),
     }
+    std::process::exit(1);
+}
+
+#[no_mangle]
+pub unsafe extern "C" fn roc_dbg(loc: *mut RocStr, msg: *mut RocStr) {
+    eprintln!("[{}] {}", &*loc, &*msg);
 }
 
 #[no_mangle]