Adding upstream version 86.0.1.upstream/86.0.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 63 insertions, 0 deletions

diff --git a/third_party/rust/parity-wasm/examples/inject.rs b/third_party/rust/parity-wasm/examples/inject.rs
new file mode 100644
index 0000000000..0e58e23167
--- /dev/null
+++ b/third_party/rust/parity-wasm/examples/inject.rs
@@ -0,0 +1,63 @@
+extern crate parity_wasm;
+
+use std::env;
+
+use parity_wasm::elements;
+use parity_wasm::builder;
+
+pub fn inject_nop(instructions: &mut elements::Instructions) {
+	use parity_wasm::elements::Instruction::*;
+	let instructions = instructions.elements_mut();
+	let mut position = 0;
+	loop {
+		let need_inject = match &instructions[position] {
+			&Block(_) | &If(_) => true,
+			_ => false,
+		};
+		if need_inject {
+			instructions.insert(position + 1, Nop);
+		}
+
+		position += 1;
+		if position >= instructions.len() {
+			break;
+		}
+	}
+}
+
+fn main() {
+	let args = env::args().collect::<Vec<_>>();
+	if args.len() != 3 {
+		println!("Usage: {} input_file.wasm output_file.wasm", args[0]);
+		return;
+	}
+
+	let mut module = parity_wasm::deserialize_file(&args[1]).unwrap();
+
+	for section in module.sections_mut() {
+		match section {
+			&mut elements::Section::Code(ref mut code_section) => {
+				for ref mut func_body in code_section.bodies_mut() {
+					inject_nop(func_body.code_mut());
+				}
+			},
+			_ => { }
+		}
+	}
+
+	let mut build = builder::from_module(module);
+	let import_sig = build.push_signature(
+		builder::signature()
+			.param().i32()
+			.param().i32()
+			.return_type().i32()
+			.build_sig()
+	);
+	let build = build.import()
+		.module("env")
+		.field("log")
+		.external().func(import_sig)
+		.build();
+
+	parity_wasm::serialize_to_file(&args[2], build.build()).unwrap();
+}
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