Add get_processed_sibling_instruction syscall (#22859)

programs/bpf/rust/sibling_inner_instruction/Cargo.toml

@@ -0,0 +1,23 @@
+[package]
+name = "solana-bpf-rust-sibling_inner-instructions"
+version = "1.10.0"
+description = "Solana BPF test program written in Rust"
+authors = ["Solana Maintainers <maintainers@solana.foundation>"]
+repository = "https://github.com/solana-labs/solana"
+license = "Apache-2.0"
+homepage = "https://solana.com/"
+documentation = "https://docs.rs/solana-bpf-rust-log-data"
+edition = "2021"
+
+[dependencies]
+solana-program = { path = "../../../../sdk/program", version = "=1.10.0" }
+
+[features]
+default = ["program"]
+program = []
+
+[lib]
+crate-type = ["lib", "cdylib"]
+
+[package.metadata.docs.rs]
+targets = ["x86_64-unknown-linux-gnu"]

programs/bpf/rust/sibling_inner_instruction/src/lib.rs

@@ -0,0 +1,69 @@
+//! Example Rust-based BPF program that queries sibling instructions
+
+#![cfg(feature = "program")]
+
+use solana_program::{
+    account_info::AccountInfo,
+    entrypoint,
+    entrypoint::ProgramResult,
+    instruction::{
+        get_processed_sibling_instruction, get_stack_height, AccountMeta, Instruction,
+        TRANSACTION_LEVEL_STACK_HEIGHT,
+    },
+    msg,
+    pubkey::Pubkey,
+};
+
+entrypoint!(process_instruction);
+fn process_instruction(
+    _program_id: &Pubkey,
+    accounts: &[AccountInfo],
+    _instruction_data: &[u8],
+) -> ProgramResult {
+    msg!("sibling inner");
+
+    // account 0 is mint
+    // account 1 is noop
+    // account 2 is invoke_and_return
+
+    // Check sibling instructions
+
+    let sibling_instruction2 = Instruction::new_with_bytes(
+        *accounts[2].key,
+        &[3],
+        vec![AccountMeta::new_readonly(*accounts[1].key, false)],
+    );
+    let sibling_instruction1 = Instruction::new_with_bytes(
+        *accounts[1].key,
+        &[2],
+        vec![
+            AccountMeta::new_readonly(*accounts[0].key, true),
+            AccountMeta::new_readonly(*accounts[1].key, false),
+        ],
+    );
+    let sibling_instruction0 = Instruction::new_with_bytes(
+        *accounts[1].key,
+        &[1],
+        vec![
+            AccountMeta::new_readonly(*accounts[1].key, false),
+            AccountMeta::new_readonly(*accounts[0].key, true),
+        ],
+    );
+
+    assert_eq!(TRANSACTION_LEVEL_STACK_HEIGHT + 1, get_stack_height());
+    assert_eq!(
+        get_processed_sibling_instruction(0),
+        Some(sibling_instruction0)
+    );
+    assert_eq!(
+        get_processed_sibling_instruction(1),
+        Some(sibling_instruction1)
+    );
+    assert_eq!(
+        get_processed_sibling_instruction(2),
+        Some(sibling_instruction2)
+    );
+    assert_eq!(get_processed_sibling_instruction(3), None);
+
+    Ok(())
+}