Add support for generating perf maps for simple perf profiling (#6030)

* Add support for generating perf maps for simple perf profiling

* add missing enum entry in C code

* bugfix: use hexa when printing the code region's length too (thanks bjorn3!)

* sanitize file name + use bufwriter

* introduce --profile CLI flag for wasmtime

* Update doc and doc comments for new --profile option

* remove redundant FromStr import

* Apply review feedback: make_line receives a Write impl, report errors

* fix tests?

* better docs

crates/jit/src/profiling.rs

@@ -11,6 +11,16 @@ cfg_if::cfg_if! {
     }
 }
 
+cfg_if::cfg_if! {
+    if #[cfg(target_os = "linux")] {
+        #[path = "profiling/perfmap_linux.rs"]
+        mod perfmap;
+    } else {
+        #[path = "profiling/perfmap_disabled.rs"]
+        mod perfmap;
+    }
+}
+
 cfg_if::cfg_if! {
     // Note: VTune support is disabled on windows mingw because the ittapi crate doesn't compile
     // there; see also https://github.com/bytecodealliance/wasmtime/pull/4003 for rationale.
@@ -24,6 +34,7 @@ cfg_if::cfg_if! {
 }
 
 pub use jitdump::JitDumpAgent;
+pub use perfmap::PerfMapAgent;
 pub use vtune::VTuneAgent;
 
 /// Common interface for profiling tools.