2019-05-24 16:21:42 -07:00
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pub mod alloc;
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pub mod allocator_bump;
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2018-10-16 16:33:31 -07:00
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pub mod bpf_verifier;
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2019-06-21 11:08:50 -07:00
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pub mod helpers;
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2018-10-16 16:33:31 -07:00
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2019-06-11 10:27:22 -07:00
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#[macro_export]
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macro_rules! solana_bpf_loader {
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() => {
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(
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"solana_bpf_loader".to_string(),
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solana_sdk::bpf_loader::id(),
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)
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};
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}
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2018-10-16 09:43:49 -07:00
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use byteorder::{ByteOrder, LittleEndian, WriteBytesExt};
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2018-12-14 20:39:10 -08:00
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use log::*;
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2019-08-23 11:03:53 -07:00
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use solana_rbpf::{memory_region::MemoryRegion, EbpfVm};
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2018-12-03 13:32:31 -08:00
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use solana_sdk::account::KeyedAccount;
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2019-03-23 20:12:27 -07:00
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use solana_sdk::instruction::InstructionError;
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2019-10-23 19:56:07 -07:00
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use solana_sdk::instruction_processor_utils::limited_deserialize;
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2018-10-25 11:13:08 -07:00
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use solana_sdk::loader_instruction::LoaderInstruction;
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use solana_sdk::pubkey::Pubkey;
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2019-10-03 14:22:48 -07:00
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use solana_sdk::sysvar::rent;
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2019-09-06 16:05:01 -07:00
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use std::convert::TryFrom;
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2018-10-16 09:43:49 -07:00
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use std::io::prelude::*;
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2019-06-21 11:08:50 -07:00
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use std::io::Error;
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2018-10-16 09:43:49 -07:00
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use std::mem;
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2019-05-24 16:21:42 -07:00
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2019-08-23 11:03:53 -07:00
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pub fn create_vm(prog: &[u8]) -> Result<(EbpfVm, MemoryRegion), Error> {
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let mut vm = EbpfVm::new(None)?;
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2018-10-26 19:38:07 -07:00
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vm.set_verifier(bpf_verifier::check)?;
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2019-10-02 10:07:44 -07:00
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vm.set_max_instruction_count(100_000)?;
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2018-11-06 14:28:46 -08:00
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vm.set_elf(&prog)?;
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2019-05-24 16:21:42 -07:00
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2019-06-21 11:08:50 -07:00
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let heap_region = helpers::register_helpers(&mut vm)?;
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2019-05-24 16:21:42 -07:00
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Ok((vm, heap_region))
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2018-10-26 19:38:07 -07:00
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}
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2018-11-13 19:54:41 -08:00
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fn serialize_parameters(
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2018-11-17 17:02:14 -08:00
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program_id: &Pubkey,
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2018-11-13 19:54:41 -08:00
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keyed_accounts: &mut [KeyedAccount],
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data: &[u8],
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) -> Vec<u8> {
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2018-10-16 09:43:49 -07:00
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assert_eq!(32, mem::size_of::<Pubkey>());
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let mut v: Vec<u8> = Vec::new();
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v.write_u64::<LittleEndian>(keyed_accounts.len() as u64)
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.unwrap();
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for info in keyed_accounts.iter_mut() {
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2018-11-29 12:32:16 -08:00
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v.write_u64::<LittleEndian>(info.signer_key().is_some() as u64)
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.unwrap();
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v.write_all(info.unsigned_key().as_ref()).unwrap();
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2019-03-05 16:28:14 -08:00
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v.write_u64::<LittleEndian>(info.account.lamports).unwrap();
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2019-03-14 09:48:27 -07:00
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v.write_u64::<LittleEndian>(info.account.data.len() as u64)
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.unwrap();
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v.write_all(&info.account.data).unwrap();
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2018-11-12 09:29:17 -08:00
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v.write_all(info.account.owner.as_ref()).unwrap();
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2018-10-16 09:43:49 -07:00
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}
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v.write_u64::<LittleEndian>(data.len() as u64).unwrap();
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v.write_all(data).unwrap();
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2018-11-17 17:02:14 -08:00
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v.write_all(program_id.as_ref()).unwrap();
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2018-10-16 09:43:49 -07:00
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v
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}
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2018-10-19 18:28:38 -07:00
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fn deserialize_parameters(keyed_accounts: &mut [KeyedAccount], buffer: &[u8]) {
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2018-10-16 09:43:49 -07:00
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assert_eq!(32, mem::size_of::<Pubkey>());
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let mut start = mem::size_of::<u64>();
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for info in keyed_accounts.iter_mut() {
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2018-11-29 12:32:16 -08:00
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start += mem::size_of::<u64>(); // skip signer_key boolean
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2018-10-16 09:43:49 -07:00
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start += mem::size_of::<Pubkey>(); // skip pubkey
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2019-03-05 16:28:14 -08:00
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info.account.lamports = LittleEndian::read_u64(&buffer[start..]);
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2018-10-16 09:43:49 -07:00
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2019-03-05 16:28:14 -08:00
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start += mem::size_of::<u64>() // skip lamports
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2018-10-16 09:43:49 -07:00
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+ mem::size_of::<u64>(); // skip length tag
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let end = start + info.account.data.len();
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info.account.data.clone_from_slice(&buffer[start..end]);
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2018-10-16 09:43:49 -07:00
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2019-03-14 09:48:27 -07:00
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start += info.account.data.len() // skip data
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2018-11-12 09:29:17 -08:00
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+ mem::size_of::<Pubkey>(); // skip owner
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2018-10-16 09:43:49 -07:00
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}
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}
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2019-06-12 08:49:59 -07:00
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pub fn process_instruction(
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program_id: &Pubkey,
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keyed_accounts: &mut [KeyedAccount],
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ix_data: &[u8],
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2019-03-18 09:05:03 -07:00
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) -> Result<(), InstructionError> {
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2018-12-14 12:36:50 -08:00
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solana_logger::setup();
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2018-10-16 16:33:31 -07:00
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2019-10-23 19:56:07 -07:00
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if let Ok(instruction) = limited_deserialize(ix_data) {
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2018-10-16 09:43:49 -07:00
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match instruction {
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LoaderInstruction::Write { offset, bytes } => {
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if keyed_accounts[0].signer_key().is_none() {
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warn!("key[0] did not sign the transaction");
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return Err(InstructionError::GenericError);
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}
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2018-10-16 09:43:49 -07:00
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let offset = offset as usize;
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2018-10-19 18:28:38 -07:00
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let len = bytes.len();
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trace!("Write: offset={} length={}", offset, len);
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2019-03-14 09:48:27 -07:00
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if keyed_accounts[0].account.data.len() < offset + len {
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2018-10-30 08:39:10 -07:00
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warn!(
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"Write overflow: {} < {}",
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2019-03-14 09:48:27 -07:00
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keyed_accounts[0].account.data.len(),
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offset + len
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);
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2019-03-18 09:05:03 -07:00
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return Err(InstructionError::GenericError);
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2018-10-16 09:43:49 -07:00
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}
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2019-03-14 09:48:27 -07:00
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keyed_accounts[0].account.data[offset..offset + len].copy_from_slice(&bytes);
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2018-10-16 09:43:49 -07:00
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}
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LoaderInstruction::Finalize => {
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2019-10-03 14:22:48 -07:00
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if keyed_accounts.len() < 2 {
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return Err(InstructionError::InvalidInstructionData);
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}
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2019-07-16 09:45:32 -07:00
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if keyed_accounts[0].signer_key().is_none() {
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warn!("key[0] did not sign the transaction");
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return Err(InstructionError::GenericError);
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}
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2019-10-03 14:22:48 -07:00
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rent::verify_rent_exemption(&keyed_accounts[0], &keyed_accounts[1])?;
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2018-10-16 09:43:49 -07:00
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keyed_accounts[0].account.executable = true;
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2018-11-29 12:32:16 -08:00
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info!(
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"Finalize: account {:?}",
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keyed_accounts[0].signer_key().unwrap()
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);
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2018-10-16 09:43:49 -07:00
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}
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2019-07-16 09:45:32 -07:00
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LoaderInstruction::InvokeMain { data } => {
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if !keyed_accounts[0].account.executable {
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warn!("BPF account not executable");
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return Err(InstructionError::GenericError);
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}
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let (progs, params) = keyed_accounts.split_at_mut(1);
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let prog = &progs[0].account.data;
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let (mut vm, heap_region) = match create_vm(prog) {
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Ok(info) => info,
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Err(e) => {
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warn!("Failed to create BPF VM: {}", e);
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return Err(InstructionError::GenericError);
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}
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};
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let mut v = serialize_parameters(program_id, params, &data);
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2019-09-10 16:13:23 -07:00
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info!("Call BPF program");
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2019-07-16 09:45:32 -07:00
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match vm.execute_program(v.as_mut_slice(), &[], &[heap_region]) {
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2019-09-06 16:05:01 -07:00
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Ok(status) => match u32::try_from(status) {
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Ok(status) => {
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if status > 0 {
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warn!("BPF program failed: {}", status);
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return Err(InstructionError::CustomError(status));
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}
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}
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Err(e) => {
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warn!("BPF VM encountered invalid status: {}", e);
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2019-07-16 09:45:32 -07:00
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return Err(InstructionError::GenericError);
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}
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2019-09-06 16:05:01 -07:00
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},
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2019-07-16 09:45:32 -07:00
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Err(e) => {
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warn!("BPF VM failed to run program: {}", e);
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return Err(InstructionError::GenericError);
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}
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}
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deserialize_parameters(params, &v);
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2019-09-10 16:13:23 -07:00
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info!("BPF program success");
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2019-07-16 09:45:32 -07:00
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}
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2018-10-16 09:43:49 -07:00
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}
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} else {
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2019-07-16 09:45:32 -07:00
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warn!("Invalid instruction data: {:?}", ix_data);
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2019-03-18 09:05:03 -07:00
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return Err(InstructionError::GenericError);
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2018-10-16 09:43:49 -07:00
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}
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2018-12-03 13:32:31 -08:00
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Ok(())
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2018-10-16 09:43:49 -07:00
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}
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2018-10-31 10:59:56 -07:00
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#[cfg(test)]
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mod tests {
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use super::*;
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2018-11-06 14:28:46 -08:00
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2018-10-31 10:59:56 -07:00
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#[test]
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2019-08-23 11:03:53 -07:00
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#[should_panic(expected = "Error: Exceeded maximum number of instructions allowed")]
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2018-10-31 10:59:56 -07:00
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fn test_non_terminating_program() {
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#[rustfmt::skip]
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let prog = &[
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2019-02-22 16:27:19 -08:00
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0x07, 0x01, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, // r6 + 1
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0x05, 0x00, 0xfe, 0xff, 0x00, 0x00, 0x00, 0x00, // goto -2
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2018-10-31 10:59:56 -07:00
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0x95, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // exit
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];
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let input = &mut [0x00];
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2018-11-06 14:28:46 -08:00
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2019-08-23 11:03:53 -07:00
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let mut vm = EbpfVm::new(None).unwrap();
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2018-11-06 14:28:46 -08:00
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vm.set_verifier(bpf_verifier::check).unwrap();
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2019-02-22 16:27:19 -08:00
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vm.set_max_instruction_count(10).unwrap();
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2018-11-06 14:28:46 -08:00
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vm.set_program(prog).unwrap();
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2019-05-24 16:21:42 -07:00
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vm.execute_program(input, &[], &[]).unwrap();
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2018-10-31 10:59:56 -07:00
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}
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}
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