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fix allocator corruption for large sizes (#7338)

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* fix allocator corruption for large sizes
* allow large chunks to coalesce and added test case
* use correct constants in MaxBigChunkSize
This commit is contained in:
jcosborn 2018-03-17 17:59:04 -05:00 • committed by Andreas Rumpf
commit e39f2a9283
5 changed files with 92 additions and 41 deletions
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48
tests/system/io.nim
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@ -1,48 +0,0 @@
import
unittest, osproc, streams, os, strformat
const STRING_DATA = "Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua. At vero eos et accusam et justo duo dolores et ea rebum. Stet clita kasd gubergren, no sea takimata sanctus est Lorem ipsum dolor sit amet. Lorem ipsum dolor sit amet, consetetur sadipscing elitr, sed diam nonumy eirmod tempor invidunt ut labore et dolore magna aliquyam erat, sed diam voluptua. At vero eos et accusam et justo duo dolores et ea rebum. Stet clita kasd gubergren, no sea takimata sanctus est Lorem ipsum dolor sit amet."
const TEST_FILE = "tests/testdata/string.txt"
proc echoLoop(str: string): string =
result = ""
var process = startProcess(findExe("tests/system/helpers/readall_echo"))
var input = process.inputStream
input.write(str)
input.close()
var output = process.outputStream
discard process.waitForExit
while not output.atEnd:
result.add(output.readLine)
suite "io":
suite "readAll":
test "stdin":
check:
echoLoop(STRING_DATA) == STRING_DATA
echoLoop(STRING_DATA[0..3999]) == STRING_DATA[0..3999]
test "file":
check:
readFile(TEST_FILE) == STRING_DATA
proc verifyFileSize(sz: int64) =
# issue 7121, large file size (2-4GB and >4Gb)
const fn = "tmpfile112358"
let size_in_mb = sz div 1_000_000
when defined(windows):
discard execProcess(&"fsutil file createnew {fn} {sz}" )
else:
discard execProcess(&"dd if=/dev/zero of={fn} bs=1000000 count={size_in_mb}")
doAssert os.getFileSize(fn) == sz # Verify OS filesize by string
var f = open(fn)
doAssert f.getFileSize() == sz # Verify file handle filesize
f.close()
os.removeFile(fn)
#disable tests for automatic testers
#for s in [50_000_000'i64, 3_000_000_000, 5_000_000_000]:
# verifyFileSize(s)