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import re
rss_re = re.compile("^VmRSS:\s+(\d+) kB$")
ptr = "(?:0x)?(?P<ptr>(?:\w+)|(?:\(nil\)))"
size = "(?P<size>\d+)"
time = "(?P<time>\d+)"
tid = "(?P<tid>\d+)"
malloc_re = re.compile("^{} {} ma {} {}$".format(time, tid, size, ptr))
free_re = re.compile("^{} {} f {}$".format(time, tid, ptr))
calloc_re = re.compile("^{} {} c (?P<nmemb>\d+) {} {}$".format(time, tid, size, ptr))
realloc_re = re.compile("^{} {} r {} {} {}$".format(time, tid, ptr, size, ptr.replace("ptr", "nptr")))
memalign_re = re.compile("^{} {} mm (?P<alignment>\d+) {} {}$".format(time, tid, size, ptr))
def analyse(path="chattymalloc.data"):
allocations = {}
requested_size = [0]
hist = {}
ln = 0
with open(path, "r") as f:
#Skip first empty line. See chattymalloc.c why it is there.
# for bl in f.readlines()[1:]:
for l in f.readlines():
ln += 1
res = malloc_re.match(l)
if res != None:
res = res.groupdict()
size = int(res["size"])
allocations[res["ptr"]] = size
requested_size.append(requested_size[-1] + size)
hist[size] = hist.get(size, 0)
continue
res = free_re.match(l)
if res != None:
res = res.groupdict()
ptr = res["ptr"]
if ptr == "(nil)" or len(ptr) != 12:
continue
requested_size.append(requested_size[-1] - allocations[ptr])
del(allocations[ptr])
continue
res = calloc_re.match(l)
if res != None:
res = res.groupdict()
size = int(res["nmemb"]) * int(res["size"])
allocations[res["ptr"]] = size
requested_size.append(requested_size[-1] + size)
hist[size] = hist.get(size, 0)
continue
res = realloc_re.match(l)
if res != None:
res = res.groupdict()
optr, size, nptr = res["ptr"], int(res["size"]), res["nptr"]
if optr == nptr:
requested_size.append(requested_size[-1] + size - allocations[nptr])
allocations[nptr] = size
else:
if optr in allocations:
requested_size.append(requested_size[-1] + size - allocations[optr])
del(allocations[optr])
else:
requested_size.append(requested_size[-1] + size)
allocations[nptr] = size
continue
res = memalign_re.match(l)
if res != None:
res = res.groupdict()
size, ptr = int(res["size"]), res["ptr"]
allocations[ptr] = size
requested_size.append(requested_size[-1] + size)
hist[size] = hist.get(size, 0)
continue
print("\ninvalid line at", ln, ":", l)
return requested_size, hist
def hist(path="chattymalloc.data"):
return analyse(path=path)[1]
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