Expose tick_height to bpf programs

programs/bpf/c/sdk/inc/solana_sdk.h

@@ -188,6 +188,14 @@ SOL_FN_PREFIX void _sol_panic(uint64_t line) {
     _sol_panic(__LINE__); \
   }
 
+/**
+ * Information about the state of the cluster immediately before the program
+ * started executing the current instruction
+ */
+typedef struct {
+  uint64_t tick_height; /** Current ledger tick */
+} SolClusterInfo;
+
 /**
  * De-serializes the input parameters into usable types
  *
@@ -206,6 +214,7 @@ SOL_FN_PREFIX void _sol_panic(uint64_t line) {
  *                   number of filled accounts in `ka_len_out`.
  * @param data On return, a pointer to the instruction data
  * @param data_len On return, the length in bytes of the instruction data
+ * @param cluster_info If not NULL, fill cluster_info
  * @return Boolean true if successful
  */
 SOL_FN_PREFIX bool sol_deserialize(
@@ -214,7 +223,8 @@ SOL_FN_PREFIX bool sol_deserialize(
   uint64_t ka_len,
   uint64_t *ka_len_out,
   const uint8_t **data,
-  uint64_t *data_len
+  uint64_t *data_len,
+  SolClusterInfo *cluster_info
 ) {
 
 
@@ -255,7 +265,11 @@ SOL_FN_PREFIX bool sol_deserialize(
   *data_len = *(uint64_t *) input;
   input += sizeof(uint64_t);
   *data = input;
+  input += sizeof(*data_len);
 
+  if (cluster_info != NULL) {
+    cluster_info->tick_height = *(uint64_t *) input;
+  }
   return true;
 }
 

programs/bpf/c/src/move_funds.c

@@ -16,7 +16,7 @@ extern bool entrypoint(const uint8_t *input) {
   const uint8_t *data;
   uint64_t data_len;
 
-  if (!sol_deserialize(input, ka, NUM_KA, NULL, &data, &data_len)) {
+  if (!sol_deserialize(input, ka, NUM_KA, NULL, &data, &data_len, NULL)) {
     return false;
   }
 

programs/bpf/c/src/noop++.cc

@@ -9,12 +9,13 @@ extern bool entrypoint(const uint8_t *input) {
   uint64_t ka_len;
   const uint8_t *data;
   uint64_t data_len;
+  SolClusterInfo info;
 
-  sol_log("noop++");
-
-  if (!sol_deserialize(input, ka, SOL_ARRAY_SIZE(ka), &ka_len, &data, &data_len)) {
+  sol_log(__FILE__);
+  if (!sol_deserialize(input, ka, SOL_ARRAY_SIZE(ka), &ka_len, &data, &data_len, &info)) {
     return false;
   }
+  sol_log_64(info.tick_height, 0, 0, 0, 0);
 
   // Log the provided account keys and instruction input data.  In the case of
   // the no-op program, no account keys or input data are expected but real

programs/bpf/c/src/noop.c

@@ -9,12 +9,14 @@ extern bool entrypoint(const uint8_t *input) {
   uint64_t ka_len;
   const uint8_t *data;
   uint64_t data_len;
+  SolClusterInfo info;
 
   sol_log(__FILE__);
 
-  if (!sol_deserialize(input, ka, SOL_ARRAY_SIZE(ka), &ka_len, &data, &data_len)) {
+  if (!sol_deserialize(input, ka, SOL_ARRAY_SIZE(ka), &ka_len, &data, &data_len, &info)) {
     return false;
   }
+  sol_log_64(info.tick_height, 0, 0, 0, 0);
 
   // Log the provided account keys and instruction input data.  In the case of
   // the no-op program, no account keys or input data are expected but real

programs/native/bpf_loader/src/lib.rs

@@ -70,13 +70,12 @@ pub fn helper_sol_log_verify(
     ))
 }
 
-#[allow(unused_variables)]
-pub fn helper_sol_log(addr: u64, unused2: u64, unused3: u64, unused4: u64, unused5: u64) -> u64 {
+pub fn helper_sol_log(addr: u64, _arg2: u64, _arg3: u64, _arg4: u64, _arg5: u64) -> u64 {
     let c_buf: *const c_char = addr as *const c_char;
     let c_str: &CStr = unsafe { CStr::from_ptr(c_buf) };
     match c_str.to_str() {
         Ok(slice) => info!("sol_log: {:?}", slice),
-        Err(e) => warn!("Error: Cannot print invalid string"),
+        Err(e) => warn!("Error: Cannot print invalid string: {}", e),
     };
     0
 }
@@ -99,7 +98,11 @@ fn create_vm(prog: &[u8]) -> Result<EbpfVmRaw, Error> {
     Ok(vm)
 }
 
-fn serialize_parameters(keyed_accounts: &mut [KeyedAccount], data: &[u8]) -> Vec<u8> {
+fn serialize_parameters(
+    keyed_accounts: &mut [KeyedAccount],
+    data: &[u8],
+    tick_height: u64,
+) -> Vec<u8> {
     assert_eq!(32, mem::size_of::<Pubkey>());
 
     let mut v: Vec<u8> = Vec::new();
@@ -115,6 +118,7 @@ fn serialize_parameters(keyed_accounts: &mut [KeyedAccount], data: &[u8]) -> Vec
     }
     v.write_u64::<LittleEndian>(data.len() as u64).unwrap();
     v.write_all(data).unwrap();
+    v.write_u64::<LittleEndian>(tick_height).unwrap();
     v
 }
 
@@ -137,7 +141,7 @@ fn deserialize_parameters(keyed_accounts: &mut [KeyedAccount], buffer: &[u8]) {
 }
 
 solana_entrypoint!(entrypoint);
-fn entrypoint(keyed_accounts: &mut [KeyedAccount], tx_data: &[u8], _tick_height: u64) -> bool {
+fn entrypoint(keyed_accounts: &mut [KeyedAccount], tx_data: &[u8], tick_height: u64) -> bool {
     static INIT: Once = ONCE_INIT;
     INIT.call_once(|| {
         // env_logger can only be initialized once
@@ -155,7 +159,7 @@ fn entrypoint(keyed_accounts: &mut [KeyedAccount], tx_data: &[u8], _tick_height:
                 return false;
             }
         };
-        let mut v = serialize_parameters(&mut keyed_accounts[1..], &tx_data);
+        let mut v = serialize_parameters(&mut keyed_accounts[1..], &tx_data, tick_height);
         match vm.execute_program(v.as_mut_slice()) {
             Ok(status) => {
                 if 0 == status {