move toaxe.py script into top-level Rocket-Chip repo
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Howard Mao
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#!/usr/bin/env python
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# This file was originally written by Matthew Naylor, University of
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# Cambridge.
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#
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# This software was partly developed by the University of Cambridge
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# Computer Laboratory under DARPA/AFRL contract FA8750-10-C-0237
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# ("CTSRD"), as part of the DARPA CRASH research programme.
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#
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# This software was partly developed by the University of Cambridge
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# Computer Laboratory under DARPA/AFRL contract FA8750-11-C-0249
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# ("MRC2"), as part of the DARPA MRC research programme.
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#
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# This software was partly developed by the University of Cambridge
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# Computer Laboratory as part of the Rigorous Engineering of
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# Mainstream Systems (REMS) project, funded by EPSRC grant
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# EP/K008528/1.
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# -------
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# Outline
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# -------
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# This script takes memory-subsystem traces produced by the groundtest
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# trace generator (see tracegen.scala) and puts them into a format
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# that can be validated by the axe tool (see
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# https://github.com/CTSRD-CHERI/axe).
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import sys
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import re
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if len(sys.argv) != 2:
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print "Usage: toaxe.py [FILE]"
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sys.exit()
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if sys.argv[1] == "-":
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f = sys.stdin
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else:
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f = open(sys.argv[1], 'r')
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if f == None:
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print "File not found: ", sys.argv[1]
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sys.exit()
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lineCount = 0
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def error(msg):
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print "Error at line ", lineCount, ": ", msg
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sys.exit()
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# Mapping from address to axe address
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addrMap = {}
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nextAddr = 0
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# Mapping from (thread id, tag id) to axe operation id
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tagMap = {}
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# Mapping from thread id to operation id
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fenceReq = {}
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# Mapping from thread id to operation id
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loadReserve = {}
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# Array of axe operations
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ops = []
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for line in f:
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# Exit loop at end of trace
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if line[0:9] == 'Completed': break
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# Parse thread id and command
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m = re.search(' *([0-9]+) *: *([^ ]*) (.*)', line)
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if m == None: error("Expected: <thread-id> ':' <command>")
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tid, cmd, line = m.group(1), m.group(2), m.group(3)
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if cmd == 'fence-req':
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# Parse time
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m = re.search(' *@ *([0-9]+)', line)
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if m == None: error ("expected timestamp")
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# Insert placeholder containing request time
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ops.append(str(m.group(1)))
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fenceReq[tid] = len(ops)-1
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elif cmd == 'fence-resp':
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# Insert 'sync' operation
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if not (tid in fenceReq) or fenceReq[tid] == None:
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error("fence-resp without fence-req on thread " + tid)
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startTime = ops[fenceReq[tid]]
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op = str(tid) + ": sync @ " + startTime
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# Add end-time
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m = re.search(' *@ *([0-9]+)', line)
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if m != None: op = op + ":" + str(m.group(1))
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ops[fenceReq[tid]] = (op,)
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fenceReq[tid] = None
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elif cmd == 'load-req' or cmd == 'load-reserve-req':
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# Parse address, tag, and time
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m = re.search(' *([0-9a-fx]+) *# *([0-9]+) *@ *([0-9]+)', line)
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if m == None: error("expected <address> #<tag> @<timestamp>")
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# Update address map
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if not (m.group(1) in addrMap):
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addrMap[m.group(1)] = nextAddr
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nextAddr = nextAddr+1
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# Insert place-holder
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ops.append((cmd, None, addrMap[m.group(1)], m.group(3), None))
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tagMap[(tid, m.group(2))] = len(ops)-1
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if cmd == 'load-reserve-req':
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loadReserve[tid] = len(ops)-1
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elif cmd == 'store-req' or cmd == 'store-cond-req' or cmd == 'swap-req':
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# Parse value, address, tag, and time
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m = re.search(' *([0-9]+) *([0-9a-fx]+) *# *([0-9]+) *@ *([0-9]+)', line)
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if m == None: error("expected <value> <address> #<tag> @<timestamp>")
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# Update address map
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if not (m.group(2) in addrMap):
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addrMap[m.group(2)] = nextAddr
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nextAddr = nextAddr+1
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# Insert place-holder
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lr = loadReserve[tid] if tid in loadReserve else None
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ops.append((cmd, m.group(1), addrMap[m.group(2)], m.group(4), lr))
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tagMap[(tid, m.group(3))] = len(ops)-1
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if cmd == 'store-cond-req': loadReserve[tid] = None
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elif cmd == 'resp':
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# Parse value and timestamp
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m = re.search(' *([0-9]+) *# *([0-9]+) *@ *([0-9]+)', line)
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if m == None: error("expected <value> #<tag> @<timestamp>")
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# Find corresponding response
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tag = m.group(2)
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if not ((tid, tag) in tagMap) or tagMap[(tid, tag)] == None:
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error("resp without associated req with tag " + tag + " on thread " + tid)
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opId = tagMap[(tid, tag)]
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(c, val, addr, start, lr) = ops[opId]
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if c == 'load-req':
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op = tid + ": M[" + str(addr) + '] == ' + m.group(1) + ' @ '
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op += start + ':' + m.group(3)
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ops[opId] = (op,)
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elif c == 'store-req':
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op = tid + ": M[" + str(addr) + '] := ' + val + ' @ '
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op += start + ':' # + m.group(3)
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ops[opId] = (op,)
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elif c == 'load-reserve-req':
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ops[opId] = (m.group(1), start, m.group(3))
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elif c == 'store-cond-req':
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if lr == None: error("store conditional without load-reserve")
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(loadVal, loadStart, loadFin) = ops[lr]
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if int(m.group(1)) != 0:
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# SC fail
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op = tid + ": M[" + str(addr) + "] == " + loadVal
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op += " @ " + loadStart + ":" + loadFin
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else:
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# SC success
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op = tid + ": { M[" + str(addr) + "] == " + loadVal + "; "
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op += "M[" + str(addr) + "] := " + val + "} @ "
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op += loadStart + ":" # + m.group(3)
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ops[lr] = (op,)
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ops[opId] = None
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elif c == 'swap-req':
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op = tid + ": { M[" + str(addr) + '] == ' + m.group(1)
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op += '; M[' + str(addr) + '] := ' + val
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op += '} @ ' + start + ':' # + m.group(3)
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ops[opId] = (op,)
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else:
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error("Unknown command '" + cmd + "'")
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lineCount = lineCount+1
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# Print address map in comments
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for addr in addrMap:
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print ("# &M[" + str(addrMap[addr]) + "] == " + addr)
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# Print axe trace
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for op in ops:
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if op != None and isinstance(op, tuple) and len(op) == 1:
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print op[0]
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