Fix a panic enabling profiling (#12186)

* Fix a panic enabling profiling

This fixes a regression from #11630 where a panic happened when loading
a component with profiling enabled.

Closes #12158

* Skip test on Windows

Author: alexcrichton

crates/wasmtime/src/runtime/instantiate.rs

@@ -176,8 +176,14 @@ impl CompiledModule {
         let key = self.index.func_by_text_offset(text_offset)?;
         match key {
             FuncKey::DefinedWasmFunction(module, def_func_index) => {
-                debug_assert_eq!(module, self.module_index());
-                Some(def_func_index)
+                // If this function is for `self` then pass it through,
+                // otherwise it's for some other module in this image so
+                // there's no `DefinedFuncIndex` for this offset.
+                if module == self.module_index() {
+                    Some(def_func_index)
+                } else {
+                    None
+                }
             }
             _ => None,
         }

tests/all/main.rs

@@ -43,6 +43,7 @@ mod native_debug;
 mod noextern;
 mod piped_tests;
 mod pooling_allocator;
+mod profiling;
 mod pulley;
 mod relocs;
 mod stack_creator;

tests/all/profiling.rs

@@ -0,0 +1,24 @@
+use wasmtime::component::Component;
+use wasmtime::{Config, Engine, Module, Result};
+
+#[test]
+#[cfg_attr(miri, ignore)]
+#[cfg_attr(windows, ignore)] // perfmap not supported on Windows
+fn perfmap() -> Result<()> {
+    let mut config = Config::new();
+    config.profiler(wasmtime::ProfilingStrategy::PerfMap);
+    let engine = Engine::new(&config)?;
+
+    Module::new(&engine, "(module (func))")?;
+    Component::new(&engine, "(component)")?;
+    Component::new(&engine, "(component (core module (func)))")?;
+    Component::new(
+        &engine,
+        "(component
+            (core module (func))
+            (core module (func))
+        )",
+    )?;
+
+    Ok(())
+}