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/api/src/trampoline/func.rs

@@ -11,7 +11,9 @@ use wasmtime_environ::entity::{EntityRef, PrimaryMap};
 use wasmtime_environ::ir::types;
 use wasmtime_environ::isa::TargetIsa;
 use wasmtime_environ::wasm::{DefinedFuncIndex, FuncIndex};
-use wasmtime_environ::{ir, settings, CompiledFunction, Export, Module, TrapInformation};
+use wasmtime_environ::{
+    ir, settings, CompiledFunction, CompiledFunctionUnwindInfo, Export, Module, TrapInformation,
+};
 use wasmtime_jit::trampoline::ir::{
     ExternalName, Function, InstBuilder, MemFlags, StackSlotData, StackSlotKind,
 };
@@ -136,6 +138,7 @@ fn make_trampoline(
 
     let mut context = Context::new();
     context.func = Function::with_name_signature(ExternalName::user(0, 0), signature.clone());
+    context.func.collect_frame_layout_info();
 
     let ss = context.func.create_stack_slot(StackSlotData::new(
         StackSlotKind::ExplicitSlot,
@@ -213,8 +216,7 @@ fn make_trampoline(
         .map_err(|error| pretty_error(&context.func, Some(isa), error))
         .expect("compile_and_emit");
 
-    let mut unwind_info = Vec::new();
-    context.emit_unwind_info(isa, &mut unwind_info);
+    let unwind_info = CompiledFunctionUnwindInfo::new(isa, &context);
 
     let traps = trap_sink.traps;