fluencelabs/wasm-utils
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working gas counter

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This commit is contained in:
NikVolf 2017-04-12 19:41:36 +03:00
parent 9419842d51
commit fe575b4eaa
1 changed files with 17 additions and 0 deletions
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17
gas/src/main.rs
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@ -18,6 +18,22 @@ pub fn update_call_index(opcodes: &mut elements::Opcodes, inserted_index: u32) {
}
}
pub fn inject_counter(opcodes: &mut elements::Opcodes, gas_func: u32) {
use parity_wasm::elements::Opcode::*;
for opcode in opcodes.elements_mut().iter_mut() {
match opcode {
&mut Block(_, ref mut block) | &mut If(_, ref mut block) => {
inject_counter(block, gas_func)
},
_ => { }
}
}
let ops = opcodes.elements_mut().len() as u32;
opcodes.elements_mut().insert(0, I32Const(ops));
opcodes.elements_mut().insert(1, Call(gas_func));
}
fn main() {
let args = env::args().collect::<Vec<_>>();
@ -66,6 +82,7 @@ fn main() {
&mut elements::Section::Code(ref mut code_section) => {
for ref mut func_body in code_section.bodies_mut() {
update_call_index(func_body.code_mut(), gas_func);
inject_counter(func_body.code_mut(), gas_func);
}
},
_ => { }