Much better support for ELF files (#755)

* Rebuild hello_elf using rustc 1.85.1 (4eb161250 2025-03-15)

* Update object and gimli

* Use runtime loaded size as total for ELF files

If you care about binary size you are probably going to strip all
debuginfo and symbols anyway. Unlike wasm, for elf twiggy requires
debuginfo so people can't strip the executable before running twiggy on
it and as such using the file size as total is misleading.

* Use symbols rather than debuginfo for finding functions on ELF

This allows functioning without debuginfo. Some standard library crates
are intentionally compiled without debuginfo and as such previously
didn't show up in the report at all or without function name. Same for
the main function. This also adds statics and anonymous allocations as a
side effect by not filtering their symbols out.

* Handle call edges for ELF files based on relocations

This also nicely handles edges involving statics and anonymous
allocations too.

* Add warning when there are no relocations

* Regenerate without debuginfo

* Rustfmt

* Update proc-macro2

Author: bjorn3

Cargo.lock

@@ -14,14 +14,11 @@ path = "./parser.rs"
 
 [dependencies]
 anyhow = "1.0"
-fallible-iterator = { version = "0.2.0", optional = true }
-gimli = { version = "0.27.3", optional = true, default-features = false, features = ["std", "read"] }
-object = { version = "0.17.0", optional = true }
+object = { version = "0.36.7", optional = true }
 wasmparser = "0.80.0"
-typed-arena = { version = "2.0.2", optional = true }
 twiggy-ir = { version = "=0.7.0", path = "../ir" }
 twiggy-traits = { version = "=0.7.0", path = "../traits" }
 
 [features]
 default = ["dwarf"]
-dwarf = ["fallible-iterator", "gimli", "object", "typed-arena", "twiggy-traits/dwarf"]
+dwarf = ["object", "twiggy-traits/dwarf"]