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This PR has the enclave runner keep track about all of the usercalls that enclaves do over their lifetimes. This includes: - The total number of each async usercall done - How many of each sync usercall each enclave TCS has done - For `wait`s and `send`s, additional grouping by signal type
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,199 @@ | ||
| use std::collections::HashMap; | ||
| use std::convert::TryInto; | ||
| use std::fmt::{Write, Error as FmtError}; | ||
| use std::result::Result as StdResult; | ||
| use std::sync::atomic::{AtomicUsize, Ordering}; | ||
| use std::sync::{Arc, Mutex}; | ||
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| use crate::usercalls::*; | ||
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| use fortanix_sgx_abi::*; | ||
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| use lazy_static::lazy_static; | ||
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| lazy_static! { | ||
| static ref USERCALL_COUNTERS: [AtomicUsize; 17] = [ | ||
| AtomicUsize::default(), | ||
| AtomicUsize::default(), AtomicUsize::default(), AtomicUsize::default(), AtomicUsize::default(), | ||
| AtomicUsize::default(), AtomicUsize::default(), AtomicUsize::default(), AtomicUsize::default(), | ||
| AtomicUsize::default(), AtomicUsize::default(), AtomicUsize::default(), AtomicUsize::default(), | ||
| AtomicUsize::default(), AtomicUsize::default(), AtomicUsize::default(), AtomicUsize::default(), | ||
| ]; | ||
| static ref TCS_MAPPINGS: Arc<Mutex<HashMap<usize, TcsStats>>> = Arc::new(Mutex::new(HashMap::new())); | ||
| } | ||
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| #[derive(Clone, Default, Debug)] | ||
| pub struct TcsStats { | ||
| // Each index corresponds to that usercall number | ||
| sync_calls: [usize; 17], | ||
| // WAIT_NO, WAIT_INDEFINITE, other | ||
| // There are 16 because there are 4 possible events to wait for | ||
| waits: [(usize, usize, usize); 16], | ||
| // targeted, not targeted | ||
| sends: [usize; 16], | ||
| } | ||
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| pub struct RunnerStats { | ||
| pub sync_calls: HashMap<usize, TcsStats>, | ||
| pub async_calls: [usize; 17], | ||
| } | ||
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| impl RunnerStats { | ||
| /// The total number of sync usercalls that have been handled as of this snapshot | ||
| pub fn total_sync_calls(&self) -> usize { | ||
| self.sync_calls.iter() | ||
| .map(|(_, stats)| stats.sync_calls.iter().sum::<usize>()) | ||
| .sum() | ||
| } | ||
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| /// The total number of async usercalls that have been handled as of this snapshot | ||
| pub fn total_async_calls(&self) -> usize { | ||
| self.async_calls.iter().sum::<usize>() | ||
| } | ||
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| /// The total number of usercalls that have been handled as of this snapshot | ||
| pub fn total_calls(&self) -> usize { | ||
| self.total_sync_calls() + self.total_async_calls() | ||
| } | ||
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| // A "stock" formatting for this information | ||
| pub fn pretty_format(&self) -> StdResult<String, FmtError> { | ||
| let mut out = String::new(); | ||
| let mut counts = USERCALL_COUNTERS.iter() | ||
| .enumerate() | ||
| .map(|(i, counter)| (i, counter.load(Ordering::Relaxed))) | ||
| .filter(|(_, counter)| *counter > 0) | ||
| .map(|(i, counter)| format!("{:?}: {}", abi::UsercallList::from_u64(i as _), counter)) | ||
| .collect::<Vec<_>>() | ||
| .join(", "); | ||
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| if counts.is_empty() { | ||
| counts = "None".to_owned(); | ||
| } | ||
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| writeln!(out, "Async usercall counts: {}", counts)?; | ||
| writeln!(out, "Sync usercall count mappings:")?; | ||
| for (addr, stats) in TCS_MAPPINGS.lock().map_err(|_| FmtError)?.iter() { | ||
| if stats.should_print() { | ||
| writeln!(out, "Address: 0x{:0>16x}", addr)?; | ||
| write!(out, "{}", stats.format()?)?; | ||
| } | ||
| } | ||
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| Ok(out) | ||
| } | ||
| } | ||
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| fn mask_to_str(ev: usize) -> String { | ||
| let mut events = vec!(); | ||
| let ev = ev as u64; | ||
| if ev & EV_CANCELQ_NOT_FULL != 0 { | ||
| events.push("CANCELQ_NOT_FULL"); | ||
| } | ||
| if ev & EV_RETURNQ_NOT_EMPTY != 0 { | ||
| events.push("RETURNQ_NOT_EMPTY"); | ||
| } | ||
| if ev & EV_USERCALLQ_NOT_FULL != 0 { | ||
| events.push("USERCALLQ_NOT_FULL"); | ||
| } | ||
| if ev & EV_UNPARK != 0 { | ||
| events.push("UNPARK"); | ||
| } | ||
| if events.is_empty() { | ||
| events.push("NONE"); | ||
| } | ||
| events.join(" | ") | ||
| } | ||
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| pub(crate) fn record_usercall( | ||
| tcs_address: Option<TcsAddress>, | ||
| p1: u64, | ||
| p2: u64, | ||
| p3: u64 | ||
| ) { | ||
| // Map sync usercalls to the TCS that made them | ||
| if let Some(tcs_address) = tcs_address { | ||
| let mut mappings = TCS_MAPPINGS.lock().expect("poisoned mutex"); | ||
| let entry = mappings.entry(tcs_address.0).or_default(); | ||
| // type | ||
| entry.sync_calls[p1 as usize] += 1; | ||
| if p1 == 11 { | ||
| // waits | ||
| let mask = &mut entry.waits[p2 as usize]; | ||
| match p3 { | ||
| WAIT_NO => mask.0 += 1, | ||
| WAIT_INDEFINITE => mask.1 += 1, | ||
| _ => mask.2 += 1, | ||
| } | ||
| } else if p1 == 12 { | ||
| // sends | ||
| entry.sends[p2 as usize] += 1; // event mask | ||
| } | ||
| } else { | ||
| // For async calls where we don't know the TCS, just store aggregates | ||
| USERCALL_COUNTERS[p1 as usize].fetch_add(1, Ordering::Relaxed); | ||
| } | ||
| } | ||
|
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| impl TcsStats { | ||
| fn should_print(&self) -> bool { | ||
| self.sync_calls.iter().sum::<usize>() > 10 | ||
| } | ||
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| pub fn format(&self) -> StdResult<String, FmtError> { | ||
| let mut out = String::new(); | ||
| writeln!(out, | ||
| " Sync Totals: {}", | ||
| self.sync_calls.iter() | ||
| .enumerate() | ||
| .filter(|(_, cnt)| **cnt > 0) | ||
| .map(|(idx, cnt)| { | ||
| format!("{:?}: {}", abi::UsercallList::from_u64(idx as u64), cnt) | ||
| }) | ||
| .collect::<Vec<_>>() | ||
| .join(", ") | ||
| )?; | ||
| writeln!(out, | ||
| " Wait Totals: {}", | ||
| self.waits.iter() | ||
| .enumerate() | ||
| .filter(|(_, (a, b, c))| a + b + c > 0) | ||
| .map(|(idx, cnt)| { | ||
| format!("{}: WAIT_NO: {} WAIT_INDEFINITE: {} OTHER: {}", mask_to_str(idx), cnt.0, cnt.1, cnt.2) | ||
| }) | ||
| .collect::<Vec<_>>() | ||
| .join("\n ") | ||
| )?; | ||
| writeln!(out, | ||
| " Send Totals: {}", | ||
| self.sends.iter() | ||
| .enumerate() | ||
| .filter(|(_, cnt)| **cnt > 0) | ||
| .map(|(idx, cnt)| { | ||
| format!("{}: {}", mask_to_str(idx), cnt) | ||
| }) | ||
| .collect::<Vec<_>>() | ||
| .join(", ") | ||
| )?; | ||
| Ok(out) | ||
| } | ||
| } | ||
|
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| pub fn get_stats() -> RunnerStats { | ||
| let async_calls: [usize; 17] = USERCALL_COUNTERS.iter() | ||
| .map(|c| c.load(Ordering::Relaxed)) | ||
| .collect::<Vec<_>>() | ||
| .try_into() | ||
| .unwrap(); | ||
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| assert!(async_calls.len() == 17); | ||
|
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| let sync_calls = { | ||
| TCS_MAPPINGS.lock().expect("poison error").clone() | ||
| }; | ||
|
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| RunnerStats { | ||
| sync_calls, | ||
| async_calls, | ||
| } | ||
| } |
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