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/jit/src/action.rs

@@ -6,7 +6,10 @@ use std::cmp::max;
 use std::{fmt, mem, ptr, slice};
 use thiserror::Error;
 use wasmtime_environ::ir;
-use wasmtime_runtime::{wasmtime_call_trampoline, Export, InstanceHandle, VMInvokeArgument};
+use wasmtime_runtime::{
+    wasmtime_call_trampoline, Backtrace, Export, InstanceHandle, TrapMessageAndStack,
+    VMInvokeArgument,
+};
 
 /// A runtime value.
 #[derive(Copy, Clone, Debug, Eq, PartialEq)]
@@ -103,6 +106,8 @@ pub enum ActionOutcome {
     Trapped {
         /// The trap message.
         message: String,
+        /// Backtrace.
+        trace: Backtrace,
     },
 }
 
@@ -191,7 +196,7 @@ pub fn invoke(
     compiler.publish_compiled_code();
 
     // Call the trampoline.
-    if let Err(message) = unsafe {
+    if let Err(TrapMessageAndStack(message, trace)) = unsafe {
         instance.with_signals_on(|| {
             wasmtime_call_trampoline(
                 callee_vmctx,
@@ -200,7 +205,7 @@ pub fn invoke(
             )
         })
     } {
-        return Ok(ActionOutcome::Trapped { message });
+        return Ok(ActionOutcome::Trapped { message, trace });
     }
 
     // Load the return values out of `values_vec`.