wip: deeper rust CI diagnostics (valid yaml)

Author: emeryberger

.github/workflows/ci.yml

@@ -334,42 +334,29 @@ jobs:
       if: runner.os == 'Linux'
       run: |
         sudo apt-get install -y -qq strace >/dev/null
+        COUNT='import json,collections,sys; t=collections.Counter(json.loads(l)["type"] for l in open(sys.argv[1]) if l.strip()); print("   ", dict(t))'
 
         echo "##### 1. C toy in THIS job (control: is the environment sane?)"
         g++ -g -O2 -c benchmarks/toy/toy.cpp -Iinclude -o /tmp/t.o
         g++ -g /tmp/t.o -o /tmp/ctoy -ldl -lpthread
         timeout 150 ./coz run -o /tmp/c.jsonl --- /tmp/ctoy >/dev/null 2>&1 || true
-        python3 -c "
-import json,collections
-t=collections.Counter()
-for l in open('/tmp/c.jsonl'):
-    l=l.strip()
-    if l: t[json.loads(l)['type']]+=1
-print('  C toy record types:', dict(t))
-" || echo "  C toy: no profile"
+        python3 -c "$COUNT" /tmp/c.jsonl || echo "    C toy: no profile"
 
         echo "##### 2. does perf_event_open succeed for the Rust toy?"
-        strace -f -qq -e trace=perf_event_open -o /tmp/st.txt           ./coz run -o /tmp/s.jsonl --- ./rust/target/release/examples/toy >/dev/null 2>&1 || true
-        echo "  perf_event_open calls: $(grep -c perf_event_open /tmp/st.txt || echo 0)"
-        echo "  failures:"; grep perf_event_open /tmp/st.txt | grep -E '= -1' | head -3 | sed 's/^/    /' || echo "    none"
-        grep perf_event_open /tmp/st.txt | head -2 | sed 's/^/    sample: /'
+        strace -f -qq -e trace=perf_event_open -o /tmp/st.txt ./coz run -o /tmp/s.jsonl --- ./rust/target/release/examples/toy >/dev/null 2>&1 || true
+        echo "  perf_event_open calls: $(grep -c perf_event_open /tmp/st.txt || true)"
+        echo "  failing calls:"; grep perf_event_open /tmp/st.txt | grep -E '= -1' | head -3 | sed 's/^/    /' || true
+        echo "  first call:"; grep perf_event_open /tmp/st.txt | head -1 | sed 's/^/    /' || true
+        python3 -c "$COUNT" /tmp/s.jsonl || echo "    no profile"
 
-        echo "##### 3. profiler lifecycle (verbose, no head/SIGPIPE)"
+        echo "##### 3. profiler lifecycle (verbose, captured to a file)"
         timeout 120 ./coz run --verbose -o /tmp/v.jsonl --- ./rust/target/release/examples/toy >/tmp/v.txt 2>&1 || true
-        grep -aE 'Profiler thread|Registered thread|Starting sampling|startup complete' /tmp/v.txt | head -8 | sed 's/^/  /'
-        echo "  verbose profile record types:"
-        python3 -c "
-import json,collections
-t=collections.Counter()
-for l in open('/tmp/v.jsonl'):
-    l=l.strip()
-    if l: t[json.loads(l)['type']]+=1
-print('   ', dict(t))
-" || echo "    none"
-
-        echo "##### 4. same, but C toy under strace for comparison"
-        strace -f -qq -e trace=perf_event_open -o /tmp/st2.txt           ./coz run -o /tmp/c2.jsonl --- /tmp/ctoy >/dev/null 2>&1 || true
-        echo "  C toy perf_event_open calls: $(grep -c perf_event_open /tmp/st2.txt || echo 0)"
+        grep -aE 'Profiler thread|Registered thread|Starting sampling|startup complete' /tmp/v.txt | head -8 | sed 's/^/  /' || true
+        python3 -c "$COUNT" /tmp/v.jsonl || echo "    no profile"
+
+        echo "##### 4. C toy under strace, for comparison"
+        strace -f -qq -e trace=perf_event_open -o /tmp/st2.txt ./coz run -o /tmp/c2.jsonl --- /tmp/ctoy >/dev/null 2>&1 || true
+        echo "  C toy perf_event_open calls: $(grep -c perf_event_open /tmp/st2.txt || true)"
 
     - name: Profile the Rust toy under coz
       run: |