Backtrace WebAssembly function JIT frames (#759)

* Create backtrace

* Extend unwind information with FDE data.

* Expose backtrace via API/Trap

* wasmtime_call returns not-str

* Return Arc<JITFrameTag>

* rename frame -> function

* Fix windows crashes and unwrap UNWIND_HISTORY_TABLE

* mmaps -> entries

* pass a backtrace in ActionOutcome

* add test_trap_stack_overflow

* Update cranelift version.

crates/runtime/src/jit_function_registry.rs

@@ -0,0 +1,83 @@
+#![allow(missing_docs)]
+
+use lazy_static::lazy_static;
+use std::collections::BTreeMap;
+use std::sync::{Arc, RwLock};
+
+lazy_static! {
+    static ref REGISTRY: RwLock<JITFunctionRegistry> = RwLock::new(JITFunctionRegistry::default());
+}
+
+#[derive(Clone)]
+pub struct JITFunctionTag {
+    pub module_id: Option<String>,
+    pub func_index: usize,
+}
+
+impl std::fmt::Debug for JITFunctionTag {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        if let Some(ref module_id) = self.module_id {
+            write!(f, "{}", module_id)?;
+        } else {
+            write!(f, "(module)")?;
+        }
+        write!(f, ":{}", self.func_index)
+    }
+}
+
+struct JITFunctionRegistry {
+    ranges: BTreeMap<usize, (usize, Arc<JITFunctionTag>)>,
+}
+
+impl Default for JITFunctionRegistry {
+    fn default() -> Self {
+        Self {
+            ranges: Default::default(),
+        }
+    }
+}
+
+impl JITFunctionRegistry {
+    fn register(&mut self, fn_start: usize, fn_end: usize, tag: JITFunctionTag) {
+        self.ranges.insert(fn_end, (fn_start, Arc::new(tag)));
+    }
+
+    fn unregister(&mut self, fn_end: usize) {
+        self.ranges.remove(&fn_end);
+    }
+
+    fn find(&self, pc: usize) -> Option<&Arc<JITFunctionTag>> {
+        self.ranges
+            .range(pc..)
+            .next()
+            .and_then(|(end, (start, s))| {
+                if *start <= pc && pc < *end {
+                    Some(s)
+                } else {
+                    None
+                }
+            })
+    }
+}
+
+pub fn register(fn_start: usize, fn_end: usize, tag: JITFunctionTag) {
+    REGISTRY
+        .write()
+        .expect("jit function registry lock got poisoned")
+        .register(fn_start, fn_end, tag);
+}
+
+pub fn unregister(_fn_start: usize, fn_end: usize) {
+    REGISTRY
+        .write()
+        .expect("jit function registry lock got poisoned")
+        .unregister(fn_end);
+}
+
+pub fn find(pc: usize) -> Option<Arc<JITFunctionTag>> {
+    REGISTRY
+        .read()
+        .expect("jit function registry lock got poisoned")
+        .find(pc)
+        .cloned()
+}