hakmem/scripts/box/pgo_tiny_profile_box.sh

#!/bin/bash
# Box: PGO Profile Collection (Tiny Front)
# Contract: Execute representative Tiny workloads for PGO
# Usage: ./scripts/box/pgo_tiny_profile_box.sh
#
# Input: Built binaries with -fprofile-generate -flto
# Output: .gcda profile data files
# Guarantees: Deterministic execution, error detection, summary report

set -e  # Fail fast on errors

SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
PGO_CONFIG_BASENAME="${PGO_CONFIG:-pgo_tiny_profile_config.sh}"
source "${SCRIPT_DIR}/${PGO_CONFIG_BASENAME}"

echo "========================================="
echo "Box: PGO Profile Collection (Tiny Front)"
echo "========================================="
echo "Date: $(date)"
echo "Workloads: $PGO_WORKLOAD_COUNT"
echo "Binaries: $PGO_BINARY_COUNT"
echo "Config: $PGO_CONFIG_BASENAME"
echo ""

# Validate binaries exist and are executable
echo "[PGO_BOX] Validating binaries..."
for bin in "${PGO_BINARIES[@]}"; do
    if [[ ! -f "$bin" ]]; then
        echo "ERROR: Binary not found: $bin"
        exit 1
    fi
    if [[ ! -x "$bin" ]]; then
        echo "ERROR: Binary not executable: $bin"
        chmod +x "$bin" || exit 1
        echo "  Fixed: Made $bin executable"
    fi
    echo "  ✓ $bin"
done
echo ""

# Clean old profile data
echo "[PGO_BOX] Cleaning old .gcda files..."
GCDA_OLD_COUNT=$(find . -name "*.gcda" 2>/dev/null | wc -l)
if [[ $GCDA_OLD_COUNT -gt 0 ]]; then
    find . -name "*.gcda" -delete
    echo "  Removed $GCDA_OLD_COUNT old .gcda files"
else
    echo "  No old .gcda files found"
fi
echo ""

# Execute workloads
echo "[PGO_BOX] Executing representative workloads..."
echo "==========================================="
WORKLOAD_NUM=0
for workload in "${PGO_WORKLOADS[@]}"; do
    WORKLOAD_NUM=$((WORKLOAD_NUM + 1))
    echo ""
    echo "[$WORKLOAD_NUM/$PGO_WORKLOAD_COUNT] Running: $workload"
    echo "-------------------------------------------"

    # Execute with timeout (30s per workload)
    if timeout 30 bash -lc "$workload"; then
        echo "  ✓ Success"
    else
        EXIT_CODE=$?
        if [[ $EXIT_CODE -eq 124 ]]; then
            echo "  ✗ TIMEOUT (30s exceeded)"
        else
            echo "  ✗ FAILED (exit code: $EXIT_CODE)"
        fi
        echo "ERROR: Workload failed: $workload"
        exit 1
    fi
done
echo ""
echo "==========================================="

# Verify profile data generated
echo "[PGO_BOX] Verifying profile data..."
GCDA_COUNT=$(find . -name "*.gcda" 2>/dev/null | wc -l)
if [[ $GCDA_COUNT -eq 0 ]]; then
    echo "ERROR: No .gcda files generated!"
    echo "  This usually means binaries were not built with -fprofile-generate"
    exit 1
fi

echo "  ✓ Generated $GCDA_COUNT .gcda files"
echo ""

# Summary
echo "========================================="
echo "PGO Profile Collection: SUCCESS"
echo "========================================="
echo "Profile files: $GCDA_COUNT .gcda files"
echo "Next step: make pgo-tiny-build"
echo ""
echo "Profile locations:"
find . -name "*.gcda" | head -5
if [[ $GCDA_COUNT -gt 5 ]]; then
    echo "  ... and $((GCDA_COUNT - 5)) more"
fi
echo "========================================="