Add compiler timeout

oj-lab · Oct 2, 2024 · dfd1a2f · dfd1a2f
1 parent 7536349
commit dfd1a2f
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Showing 2 changed files with 37 additions and 16 deletions.
diff --git a/judge-core/Cargo.toml b/judge-core/Cargo.toml
@@ -17,6 +17,7 @@ serde = "1"
 serde_derive = "1"
 serde_json = "1"
 serde_yaml = "0.9"
+wait-timeout = "0.2"
 
 [dev-dependencies]
 # Need to lock the version of env_logger to 0.10.0

diff --git a/judge-core/src/compiler.rs b/judge-core/src/compiler.rs
@@ -2,7 +2,10 @@ use crate::error::JudgeCoreError;
 use crate::utils::get_pathbuf_str;
 use anyhow::anyhow;
 use serde_derive::{Deserialize, Serialize};
+use wait_timeout::ChildExt;
 use std::path::PathBuf;
+use std::process::Stdio;
+use std::time::Duration;
 use std::{fmt, fs};
 use std::{process::Command, str::FromStr};
 
@@ -13,6 +16,8 @@ const RUST_COMPILE_COMMAND_TEMPLATE: &str = "rustc {src_path} -o {target_path}";
 const CPP_COMPILE_COMMAND_TEMPLATE: &str = "g++ {src_path} -o {target_path} -O2 -static";
 const PYTHON_COMPILE_COMMAND_TEMPLATE: &str = "cp {src_path} {target_path}";
 
+const COMPILE_TIMEOUT: Duration = Duration::from_secs(15);
+
 #[derive(Clone)]
 struct CommandBuilder {
     command_template: String,
@@ -162,22 +167,37 @@ impl Compiler {
             std::fs::remove_file(target_path)?;
         }
 
-        let output = Command::new("sh")
-            .arg("-c")
-            .arg(
-                self.command_builder
-                    .get_command(vec![src_path_string, target_path_string]),
-            )
-            .args(self.compiler_args.iter())
-            .output()?;
-        if output.status.success() {
-            let compile_output = String::from_utf8_lossy(&output.stdout).to_string();
-            log::debug!("Compile output: {}", compile_output);
-            Ok(compile_output)
-        } else {
-            let error_output = String::from_utf8_lossy(&output.stderr).to_string();
-            log::error!("Compile error: {}", error_output);
-            Err(JudgeCoreError::CompileError(error_output))
+        let mut child = Command::new("sh")
+        .arg("-c")
+        .arg(
+            self.command_builder
+                .get_command(vec![src_path_string, target_path_string]),
+        )
+        .args(self.compiler_args.iter())
+        .stdout(Stdio::piped())
+        .stderr(Stdio::piped())
+        .spawn()?;
+
+        match child.wait_timeout(COMPILE_TIMEOUT)? {
+            Some(status) => {
+                if status.success() {
+                    let output = child.wait_with_output()?;
+                    let compile_output = String::from_utf8_lossy(&output.stdout).to_string();
+                    log::debug!("Compile output: {}", compile_output);
+                    Ok(compile_output)
+                } else {
+                    let output = child.wait_with_output()?;
+                    let error_output = String::from_utf8_lossy(&output.stderr).to_string();
+                    log::error!("Compile error: {}", error_output);
+                    Err(JudgeCoreError::CompileError(error_output))
+                }
+            }
+            None => {
+                child.kill()?;
+                let error_output = "Compile process timed out".to_string();
+                log::error!("Compile error: {}", error_output);
+                Err(JudgeCoreError::CompileError(error_output))
+            }
         }
     }
 }