Add store-tool (#13254)

Cargo.lock

@@ -4903,6 +4903,19 @@ dependencies = [
  "solana-transaction-status",
 ]
 
+[[package]]
+name = "solana-store-tool"
+version = "1.5.0"
+dependencies = [
+ "clap",
+ "log 0.4.8",
+ "solana-logger 1.5.0",
+ "solana-measure",
+ "solana-runtime",
+ "solana-sdk 1.5.0",
+ "solana-version",
+]
+
 [[package]]
 name = "solana-streamer"
 version = "1.5.0"

Cargo.toml

@@ -53,6 +53,7 @@ members = [
     "remote-wallet",
     "ramp-tps",
     "runtime",
+    "runtime/store-tool",
     "sdk",
     "sdk/cargo-build-bpf",
     "scripts",

runtime/src/append_vec.rs

@@ -111,11 +111,14 @@ pub struct AppendVec {
     append_offset: Mutex<usize>,
     current_len: AtomicUsize,
     file_size: u64,
+    remove_on_drop: bool,
 }
 
 impl Drop for AppendVec {
     fn drop(&mut self) {
-        let _ignored = remove_file(&self.path);
+        if self.remove_on_drop {
+            let _ignored = remove_file(&self.path);
+        }
     }
 }
 
@@ -176,11 +179,16 @@ impl AppendVec {
             append_offset: Mutex::new(initial_len),
             current_len: AtomicUsize::new(initial_len),
             file_size: size as u64,
+            remove_on_drop: true,
         }
     }
 
+    pub fn set_no_remove_on_drop(&mut self) {
+        self.remove_on_drop = false;
+    }
+
     #[allow(clippy::mutex_atomic)]
-    pub(crate) fn new_empty_map(current_len: usize) -> Self {
+    pub fn new_empty_map(current_len: usize) -> Self {
         let map = MmapMut::map_anon(1).unwrap_or_else(|e| {
             error!(
                 "Failed to create VM map for snapshot. {:?}\n
@@ -196,6 +204,7 @@ impl AppendVec {
             append_offset: Mutex::new(current_len),
             current_len: AtomicUsize::new(current_len),
             file_size: 0, // will be filled by set_file()
+            remove_on_drop: true,
         }
     }
 

runtime/store-tool/Cargo.toml

@@ -0,0 +1,22 @@
+[package]
+authors = ["Solana Maintainers <maintainers@solana.foundation>"]
+edition = "2018"
+name = "solana-store-tool"
+description = "Tool to inspect append vecs"
+version = "1.5.0"
+repository = "https://github.com/solana-labs/solana"
+license = "Apache-2.0"
+homepage = "https://solana.com/"
+publish = false
+
+[dependencies]
+log = { version = "0.4.8" }
+solana-logger = { path = "../../logger", version = "1.5.0" }
+solana-version = { path = "../../version", version = "1.5.0" }
+solana-measure = { path = "../../measure", version = "1.5.0" }
+solana-runtime = { path = "..", version = "1.5.0" }
+solana-sdk = { path = "../../sdk", version = "1.5.0" }
+clap = "2.33.1"
+
+[package.metadata.docs.rs]
+targets = ["x86_64-unknown-linux-gnu"]

runtime/store-tool/src/main.rs

@@ -0,0 +1,47 @@
+use clap::{crate_description, crate_name, value_t_or_exit, App, Arg};
+use log::*;
+use solana_runtime::append_vec::AppendVec;
+
+fn main() {
+    solana_logger::setup_with_default("solana=info");
+    let matches = App::new(crate_name!())
+        .about(crate_description!())
+        .version(solana_version::version!())
+        .arg(
+            Arg::with_name("file")
+                .long("file")
+                .takes_value(true)
+                .value_name("<PATH>")
+                .help("store to open"),
+        )
+        .arg(
+            Arg::with_name("len")
+                .long("len")
+                .takes_value(true)
+                .value_name("LEN")
+                .help("len of store to open"),
+        )
+        .get_matches();
+
+    let file = value_t_or_exit!(matches, "file", String);
+    let len = value_t_or_exit!(matches, "len", usize);
+    let mut store = AppendVec::new_empty_map(len);
+    store.set_no_remove_on_drop();
+    store.set_file(file).expect("set_file failed");
+    let accounts = store.accounts(0);
+    info!(
+        "store: len: {} capacity: {} accounts: {}",
+        store.len(),
+        store.capacity(),
+        accounts.len()
+    );
+    for account in store.accounts(0) {
+        info!(
+            "  account: {:?} version: {} data: {} hash: {:?}",
+            account.meta.pubkey, account.meta.write_version, account.meta.data_len, account.hash
+        );
+    }
+}
+
+#[cfg(test)]
+pub mod test {}