Method execute

src/commands/objdump.rs:108–402

Executes the command.

(self)

    /// Executes the command.
    pub fn execute(self) -> Result<()> {
        // Setup stdout handling color options. Also build some variables used
        // below to configure colors of certain items.
        let mut choice = self.color;
        if choice == ColorChoice::Auto && !std::io::stdout().is_terminal() {
            choice = ColorChoice::Never;
        }
        let mut stdout = StandardStream::stdout(choice);

        let mut color_address = ColorSpec::new();
        color_address.set_bold(true).set_fg(Some(Color::Yellow));
        let mut color_bytes = ColorSpec::new();
        color_bytes.set_fg(Some(Color::Magenta));

        let bytes = self.read_cwasm()?;

        // Double-check this is a `*.cwasm`
        if Engine::detect_precompiled(&bytes).is_none() {
            bail!("not a `*.cwasm` file from wasmtime: {:?}", self.cwasm);
        }

        // Parse the input as an ELF file, extract the `.text` section.
        let elf = ElfFile64::<Endianness>::parse(&bytes)?;
        let text = elf
            .section_by_name(".text")
            .context("missing .text section")?;
        let text = text.data()?;

        let frame_table_descriptors = elf
            .section_by_name(obj::ELF_WASMTIME_FRAMES)
            .and_then(|section| section.data().ok())
            .and_then(|bytes| FrameTable::parse(bytes, text).ok());

        let mut breakpoints = frame_table_descriptors
            .iter()
            .flat_map(|ftd| ftd.breakpoint_patches())
            .map(|(wasm_pc, patch)| (wasm_pc, patch.offset, SmallVec::from(patch.enable)))
            .collect::<Vec<_>>();
        breakpoints.sort_by_key(|(_wasm_pc, native_offset, _patch)| *native_offset);
        let breakpoints: Box<dyn Iterator<Item = _>> = Box::new(breakpoints.into_iter());
        let breakpoints = breakpoints.peekable();

        // Build the helper that'll get used to attach decorations/annotations
        // to various instructions.
        let mut decorator = Decorator {
            addrmap: elf
                .section_by_name(obj::ELF_WASMTIME_ADDRMAP)
                .and_then(|section| section.data().ok())
                .and_then(|bytes| wasmtime_environ::iterate_address_map(bytes))
                .map(|i| (Box::new(i) as Box<dyn Iterator<Item = _>>).peekable()),
            traps: elf
                .section_by_name(obj::ELF_WASMTIME_TRAPS)
                .and_then(|section| section.data().ok())
                .and_then(|bytes| wasmtime_environ::iterate_traps(bytes))
                .map(|i| (Box::new(i) as Box<dyn Iterator<Item = _>>).peekable()),
            stack_maps: elf
                .section_by_name(obj::ELF_WASMTIME_STACK_MAP)
                .and_then(|section| section.data().ok())