Merge panic-abort and panic-log crates into mc-sgx-panic

This moves the previously named `mc-sgx-panic` crate to
`mc-sgx-panic-sys`.

.github/workflows/ci.yaml

@@ -21,10 +21,6 @@ jobs:
           components: rustfmt
       - uses: r7kamura/rust-problem-matchers@v1
       - run: cargo fmt --all -- --check
-      - run: cargo fmt --all -- --check
-        working-directory: panic/abort
-      - run: cargo fmt --all -- --check
-        working-directory: panic/log
 
   markdown-lint:
     runs-on: ubuntu-22.04
@@ -60,10 +56,6 @@ jobs:
       - uses: actions/checkout@v3
       - run: cargo install cargo-sort
       - run: cargo sort --workspace --check >/dev/null
-      - run: cargo sort --workspace --check >/dev/null
-        working-directory: panic/abort
-      - run: cargo sort --workspace --check >/dev/null
-        working-directory: panic/log
 
   clippy:
     runs-on: ubuntu-22.04
@@ -82,10 +74,6 @@ jobs:
           components: clippy
       - uses: r7kamura/rust-problem-matchers@v1
       - run: cargo +${{ matrix.rust }} clippy --all --all-features -- -D warnings
-      - run: cargo +${{ matrix.rust }} clippy --all --all-features -- -D warnings
-        working-directory: panic/abort
-      - run: cargo +${{ matrix.rust }} clippy --all --all-features -- -D warnings
-        working-directory: panic/log
 
   build:
     runs-on: ubuntu-22.04
@@ -106,10 +94,6 @@ jobs:
           toolchain: ${{ matrix.rust }}
       - uses: r7kamura/rust-problem-matchers@v1
       - run: cargo +${{ matrix.rust }} build --release
-      - run: cargo +${{ matrix.rust }} build --release
-        working-directory: panic/abort
-      - run: cargo +${{ matrix.rust }} build --release
-        working-directory: panic/log
 
   test:
     runs-on: ubuntu-22.04
@@ -147,10 +131,6 @@ jobs:
           toolchain: ${{ matrix.rust }}
       - uses: r7kamura/rust-problem-matchers@v1
       - run: cargo +${{ matrix.rust }} doc --release --no-deps
-      - run: cargo +${{ matrix.rust }} doc --release --no-deps
-        working-directory: panic/abort
-      - run: cargo +${{ matrix.rust }} doc --release --no-deps
-        working-directory: panic/log
 
   coverage:
     runs-on: ubuntu-22.04

Cargo.toml

@@ -4,11 +4,10 @@ members = [
     "io",
     "io/untrusted",
     "panic",
+    "panic/sys",
     "sync",
 ]
 exclude = [
-    "panic/abort",
-    "panic/log",
     "test_enclave",
 ]
 

panic/Cargo.toml

@@ -7,8 +7,13 @@ rust-version = "1.62.1"
 license = "Apache-2.0"
 readme = "README.md"
 repository = "https://github.com/mobilecoinfoundation/sgx-std"
-description = "Common panic handling behavior for SGX enclaves"
+description = "Panic handler for SGX enclaves"
 categories = ["hardware-support", "no-std"]
 keywords = ["sgx", "no-std", "panic"]
 
+[features]
+log = ["dep:mc-sgx-io", "dep:mc-sgx-sync"]
+
 [dependencies]
+mc-sgx-io = { path = "../io", version = "0.1.0", optional = true }
+mc-sgx-sync = { path = "../sync", version = "0.1.0", optional = true }

panic/README.md

@@ -7,7 +7,16 @@
 -->[![Docs Status][docs-image]][docs-link]<!--
 -->[![Dependency Status][deps-image]][deps-link]
 
-Common panic handling behavior for SGX enclaves
+Panic handler for use in SGX enclaves
+
+The panic handler will redirect to the SGX SDK `abort()` method to mark the
+enclave as crashed.
+
+## Features
+
+- `log`: Log panic messages during panic handling. The panic messages will be
+directed to the host via
+[mc-sgx-io::stderr_write_all](https://docs.rs/mc-sgx-io/latest/mc_sgx_io/fn.stderr_write_all.html).
 
 [chat-image]: https://img.shields.io/discord/844353360348971068?style=flat-square
 [chat-link]: https://mobilecoin.chat

panic/src/lib.rs

@@ -1,8 +1,24 @@
-// Copyright (c) 2023 The MobileCoin Foundation
-#![feature(thread_local)]
+// Copyright (c) 2022-2023 The MobileCoin Foundation
+
 #![doc = include_str!("../README.md")]
-#![deny(missing_docs, missing_debug_implementations, unsafe_code)]
+#![deny(missing_docs, missing_debug_implementations)]
 #![no_std]
 
-mod panicking;
-pub mod thread;
+#[cfg(not(test))]
+use core::panic::PanicInfo;
+
+#[cfg(feature = "log")]
+mod log;
+
+#[cfg(not(test))]
+#[panic_handler]
+fn panic(_info: &PanicInfo) -> ! {
+    #[cfg(feature = "log")]
+    log::log_panic_info(_info);
+
+    extern "C" {
+        fn abort() -> !;
+    }
+
+    unsafe { abort() }
+}

panic/log/src/lib.rs → panic/src/log.rs

@@ -1,8 +1,6 @@
-// Copyright (c) 2022 The MobileCoin Foundation
+// Copyright (c) 2022-2023 The MobileCoin Foundation
 
-#![doc = include_str!("../README.md")]
-#![deny(missing_docs, missing_debug_implementations)]
-#![no_std]
+//! Logging utilities used during panic handling
 
 use core::fmt::Write;
 use core::panic::PanicInfo;
@@ -14,20 +12,14 @@ use mc_sgx_sync::Mutex;
 /// the cause of the panic.
 static MESSAGE_BUFFER: Mutex<WriteBuffer> = Mutex::new(WriteBuffer::new());
 
-#[panic_handler]
-fn panic(info: &PanicInfo) -> ! {
-    log_panic_info(info);
-    loop {}
-}
-
 /// Log information during a panic
 ///
 /// If for some reason the `info` exceeds the size of the [`MESSAGE_BUFFER`]
 /// then this will log a default message.
 ///
 /// # Arguments:
 /// * `info` - The panic information to log
-fn log_panic_info(info: &PanicInfo) {
+pub(crate) fn log_panic_info(info: &PanicInfo) {
     if let Ok(mut buffer) = MESSAGE_BUFFER.lock() {
         buffer.clear();
         let message = match write!(buffer, "{info}") {

panic/sys/Cargo.toml

@@ -0,0 +1,14 @@
+[package]
+name = "mc-sgx-panic-sys"
+version = "0.1.0"
+edition = "2021"
+authors = ["MobileCoin"]
+rust-version = "1.65"
+license = "Apache-2.0"
+readme = "README.md"
+repository = "https://github.com/mobilecoinfoundation/sgx-std"
+description = "Common panic handling behavior for SGX enclaves"
+categories = ["hardware-support", "no-std"]
+keywords = ["sgx", "no-std", "panic"]
+
+[dependencies]

panic/sys/README.md

@@ -0,0 +1,21 @@
+# MobileCoin: System specific logic for panic handling
+
+[![Project Chat][chat-image]][chat-link]<!--
+-->![License][license-image]<!--
+-->![Target][target-image]<!--
+-->[![Crates.io][crate-image]][crate-link]<!--
+-->[![Docs Status][docs-image]][docs-link]<!--
+-->[![Dependency Status][deps-image]][deps-link]
+
+System specific logic for panic handling
+
+[chat-image]: https://img.shields.io/discord/844353360348971068?style=flat-square
+[chat-link]: https://mobilecoin.chat
+[license-image]: https://img.shields.io/crates/l/mc-sgx-panic-sys?style=flat-square
+[target-image]: https://img.shields.io/badge/target-x86__64-blue?style=flat-square
+[crate-image]: https://img.shields.io/crates/v/mc-sgx-panic-sys.svg?style=flat-square
+[crate-link]: https://crates.io/crates/mc-sgx-panic-sys
+[docs-image]: https://img.shields.io/docsrs/mc-sgx-panic-sys?style=flat-square
+[docs-link]: https://docs.rs/crate/mc-sgx-panic-sys
+[deps-image]: https://deps.rs/crate/mc-sgx-panic-sys/0.1.0/status.svg?style=flat-square
+[deps-link]: https://deps.rs/crate/mc-sgx-panic-sys/0.1.0

panic/sys/src/lib.rs

@@ -0,0 +1,8 @@
+// Copyright (c) 2022-2023 The MobileCoin Foundation
+#![feature(thread_local)]
+#![doc = include_str!("../README.md")]
+#![deny(missing_docs, missing_debug_implementations, unsafe_code)]
+#![no_std]
+
+mod panicking;
+pub mod thread;

panic/src/thread.rs → panic/sys/src/thread.rs

@@ -24,7 +24,7 @@ use crate::panicking;
 /// # Examples
 ///
 /// ```should_panic
-/// use mc_sgx_panic::thread;
+/// use mc_sgx_panic_sys::thread;
 ///
 /// struct SomeStruct;
 ///

sync/Cargo.toml

@@ -17,5 +17,5 @@ test = false
 doctest = false
 
 [dependencies]
-mc-sgx-panic = { path = "../panic", version = "=0.1.0" }
+mc-sgx-panic-sys = { path = "../panic/sys", version = "=0.1.0" }
 mc-sgx-tstdc = "0.4.1"

sync/src/poison.rs

@@ -15,7 +15,7 @@
 use core::error::Error;
 use core::fmt;
 use core::sync::atomic::{AtomicBool, Ordering};
-use mc_sgx_panic::thread;
+use mc_sgx_panic_sys::thread;
 
 pub(crate) struct Flag {
     failed: AtomicBool,