Add a compilation section to disable address maps (#3598)

* Add a compilation section to disable address maps

This commit adds a new `Config::generate_address_map` compilation
setting which is used to disable emission of the `.wasmtime.addrmap`
section of compiled artifacts. This section is currently around the size
of the entire `.text` section itself unfortunately and for size reasons
may wish to be omitted. Functionality-wise all that is lost is knowing
the precise wasm module offset address of a faulting instruction or in a
backtrace of instructions. This also means that if the module has DWARF
debugging information available with it Wasmtime isn't able to produce a
filename and line number in the backtrace.

This option remains enabled by default. This option may not be needed in
the future with #3547 perhaps, but in the meantime it seems reasonable
enough to support a configuration mode where the section is entirely
omitted if the smallest module possible is desired.

* Fix some CI issues

* Update tests/all/traps.rs

Co-authored-by: Nick Fitzgerald <fitzgen@gmail.com>

* Do less work in compilation for address maps

But only when disabled

Co-authored-by: Nick Fitzgerald <fitzgen@gmail.com>

crates/environ/src/compilation.rs

@@ -171,7 +171,7 @@ pub trait Compiler: Send + Sync {
         module: &ModuleTranslation,
         types: &TypeTables,
         funcs: PrimaryMap<DefinedFuncIndex, Box<dyn Any + Send>>,
-        emit_dwarf: bool,
+        tunables: &Tunables,
         obj: &mut Object<'static>,
     ) -> Result<(PrimaryMap<DefinedFuncIndex, FunctionInfo>, Vec<Trampoline>)>;
 

crates/environ/src/tunables.rs

@@ -42,6 +42,10 @@ pub struct Tunables {
     /// Whether or not linear memory allocations will have a guard region at the
     /// beginning of the allocation in addition to the end.
     pub guard_before_linear_memory: bool,
+
+    /// Indicates whether an address map from compiled native code back to wasm
+    /// offsets in the original file is generated.
+    pub generate_address_map: bool,
 }
 
 impl Default for Tunables {
@@ -86,6 +90,7 @@ impl Default for Tunables {
             consume_fuel: false,
             static_memory_bound_is_maximum: false,
             guard_before_linear_memory: true,
+            generate_address_map: true,
         }
     }
 }