t/t5351-unpack-large-objects.sh

   1 #!/bin/sh
   2 #
   3 # Copyright (c) 2022 Han Xin
   4 #
   5
   6 test_description='git unpack-objects with large objects'
   7
   8 TEST_PASSES_SANITIZE_LEAK=true
   9 . ./test-lib.sh
  10
  11 prepare_dest () {
  12         test_when_finished "rm -rf dest.git" &&
  13         git init --bare dest.git &&
  14         git -C dest.git config core.bigFileThreshold "$1"
  15 }
  16
  17 test_expect_success "create large objects (1.5 MB) and PACK" '
  18         test-tool genrandom foo 1500000 >big-blob &&
  19         test_commit --append foo big-blob &&
  20         test-tool genrandom bar 1500000 >big-blob &&
  21         test_commit --append bar big-blob &&
  22         PACK=$(echo HEAD | git pack-objects --revs pack) &&
  23         git verify-pack -v pack-$PACK.pack >out &&
  24         sed -n -e "s/^\([0-9a-f][0-9a-f]*\).*\(commit\|tree\|blob\).*/\1/p" \
  25                 <out >obj-list
  26 '
  27
  28 test_expect_success 'set memory limitation to 1MB' '
  29         GIT_ALLOC_LIMIT=1m &&
  30         export GIT_ALLOC_LIMIT
  31 '
  32
  33 test_expect_success 'unpack-objects failed under memory limitation' '
  34         prepare_dest 2m &&
  35         test_must_fail git -C dest.git unpack-objects <pack-$PACK.pack 2>err &&
  36         grep "fatal: attempting to allocate" err
  37 '
  38
  39 test_expect_success 'unpack-objects works with memory limitation in dry-run mode' '
  40         prepare_dest 2m &&
  41         git -C dest.git unpack-objects -n <pack-$PACK.pack &&
  42         test_stdout_line_count = 0 find dest.git/objects -type f &&
  43         test_dir_is_empty dest.git/objects/pack
  44 '
  45
  46 test_expect_success 'unpack big object in stream' '
  47         prepare_dest 1m &&
  48         git -C dest.git unpack-objects <pack-$PACK.pack &&
  49         test_dir_is_empty dest.git/objects/pack
  50 '
  51
  52 check_fsync_events () {
  53         local trace="$1" &&
  54         shift &&
  55
  56         cat >expect &&
  57         sed -n \
  58                 -e '/^{"event":"counter",.*"category":"fsync",/ {
  59                         s/.*"category":"fsync",//;
  60                         s/}$//;
  61                         p;
  62                 }' \
  63                 <"$trace" >actual &&
  64         test_cmp expect actual
  65 }
  66
  67 BATCH_CONFIGURATION='-c core.fsync=loose-object -c core.fsyncmethod=batch'
  68
  69 test_expect_success 'unpack big object in stream (core.fsyncmethod=batch)' '
  70         prepare_dest 1m &&
  71         GIT_TRACE2_EVENT="$(pwd)/trace2.txt" \
  72         GIT_TEST_FSYNC=true \
  73                 git -C dest.git $BATCH_CONFIGURATION unpack-objects <pack-$PACK.pack &&
  74         if grep "core.fsyncMethod = batch is unsupported" trace2.txt
  75         then
  76                 flush_count=7
  77         else
  78                 flush_count=1
  79         fi &&
  80         check_fsync_events trace2.txt <<-EOF &&
  81         "name":"writeout-only","count":6
  82         "name":"hardware-flush","count":$flush_count
  83         EOF
  84
  85         test_dir_is_empty dest.git/objects/pack &&
  86         git -C dest.git cat-file --batch-check="%(objectname)" <obj-list >current &&
  87         cmp obj-list current
  88 '
  89
  90 test_expect_success 'do not unpack existing large objects' '
  91         prepare_dest 1m &&
  92         git -C dest.git index-pack --stdin <pack-$PACK.pack &&
  93         git -C dest.git unpack-objects <pack-$PACK.pack &&
  94
  95         # The destination came up with the exact same pack...
  96         DEST_PACK=$(echo dest.git/objects/pack/pack-*.pack) &&
  97         cmp pack-$PACK.pack $DEST_PACK &&
  98
  99         # ...and wrote no loose objects
 100         test_stdout_line_count = 0 find dest.git/objects -type f ! -name "pack-*"
 101 '
 102
 103 test_done