Mercurial > hg
annotate tests/test-dirstate-read-race.t @ 50229:7169ff59a2f8 stable
dirstate: initial creation of a test file to check dirstate race read
More problems to solveā¦ yeah ! (I guess)
author | Pierre-Yves David <pierre-yves.david@octobus.net> |
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date | Sat, 25 Feb 2023 00:54:30 +0100 |
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children | e5fea4f1b052 |
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1 ============================================================================== |
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2 Check potential race conditions between a dirstate's read and other operations |
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3 ============================================================================== |
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4 |
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5 Some commands, like `hg status`, do not need to take the wlock but need to |
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6 access dirstate data. |
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7 Other commands might update the dirstate data while this happens. |
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8 |
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9 This can create issues if repository data is read in the wrong order, or for |
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10 the dirstate-v2 format where the data is contained in multiple files. |
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11 |
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12 This test file is meant to test various cases where such parallel operations |
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13 happen and make sure the reading process behaves fine. We do so with a `hg |
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14 status` command since it is probably the most advanced of such read-only |
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15 command. |
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16 |
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17 It bears simililarity with `tests/test-dirstate-status-race.t ` but tests a |
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18 different type of race. |
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19 |
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20 Setup |
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21 ===== |
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22 |
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23 $ directories="dir dir/nested dir2" |
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24 $ first_files="dir/nested/a dir/b dir/c dir/d dir2/e f" |
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25 $ second_files="g dir/nested/h dir/i dir/j dir2/k dir2/l dir/nested/m" |
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26 $ extra_files="dir/n dir/o p q" |
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27 |
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28 $ hg init reference-repo |
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29 $ cd reference-repo |
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30 $ mkdir -p dir/nested dir2 |
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31 $ touch -t 200001010000 $first_files $directories |
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32 $ hg commit -Aqm "recreate a bunch of files to facilitate dirstate-v2 append" |
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33 $ touch -t 200001010010 $second_files $directories |
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34 $ hg commit -Aqm "more files to have two commit" |
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35 $ hg log -G -v |
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36 @ changeset: 1:9a86dcbfb938 |
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37 | tag: tip |
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38 | user: test |
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39 | date: Thu Jan 01 00:00:00 1970 +0000 |
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40 | files: dir/i dir/j dir/nested/h dir/nested/m dir2/k dir2/l g |
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41 | description: |
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42 | more files to have two commit |
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43 | |
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44 | |
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45 o changeset: 0:4f23db756b09 |
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46 user: test |
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47 date: Thu Jan 01 00:00:00 1970 +0000 |
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48 files: dir/b dir/c dir/d dir/nested/a dir2/e f |
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49 description: |
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50 recreate a bunch of files to facilitate dirstate-v2 append |
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51 |
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52 |
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53 $ hg manifest |
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54 dir/b |
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55 dir/c |
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56 dir/d |
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57 dir/i |
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58 dir/j |
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59 dir/nested/a |
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60 dir/nested/h |
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61 dir/nested/m |
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62 dir2/e |
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63 dir2/k |
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64 dir2/l |
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65 f |
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66 g |
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67 |
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68 Add some unknown files and refresh the dirstate |
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69 |
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70 $ touch -t 200001010020 $extra_files |
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71 $ hg add dir/o |
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72 $ hg remove dir/nested/m |
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73 |
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74 $ hg st --config devel.dirstate.v2.data_update_mode=force-new |
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75 A dir/o |
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76 R dir/nested/m |
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77 ? dir/n |
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78 ? p |
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79 ? q |
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80 $ hg debugstate |
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81 n 644 0 2000-01-01 00:00:00 dir/b |
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82 n 644 0 2000-01-01 00:00:00 dir/c |
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83 n 644 0 2000-01-01 00:00:00 dir/d |
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84 n 644 0 2000-01-01 00:10:00 dir/i |
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85 n 644 0 2000-01-01 00:10:00 dir/j |
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86 n 644 0 2000-01-01 00:00:00 dir/nested/a |
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87 n 644 0 2000-01-01 00:10:00 dir/nested/h |
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88 r ?????????????????????????????????? dir/nested/m (glob) |
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89 a ?????????????????????????????????? dir/o (glob) |
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90 n 644 0 2000-01-01 00:00:00 dir2/e |
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91 n 644 0 2000-01-01 00:10:00 dir2/k |
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92 n 644 0 2000-01-01 00:10:00 dir2/l |
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93 n 644 0 2000-01-01 00:00:00 f |
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94 n 644 0 2000-01-01 00:10:00 g |
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95 $ hg debugstate > ../reference |
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96 $ cd .. |
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97 |
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98 Actual Testing |
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99 ============== |
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100 |
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101 Race with a `hg add` |
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102 ------------------- |
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103 |
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104 $ cp -a reference-repo race-with-add |
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105 $ cd race-with-add |
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106 |
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107 spin a `hg status` with some caches to update |
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108 |
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109 $ hg st >$TESTTMP/status-race-lock.out 2>$TESTTMP/status-race-lock.log \ |
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110 > --config rhg.on-unsupported=abort \ |
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111 > --config devel.sync.dirstate.pre-read-file=$TESTTMP/status-race-lock \ |
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112 > & |
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113 $ $RUNTESTDIR/testlib/wait-on-file 5 $TESTTMP/status-race-lock.waiting |
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114 |
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115 Add a file |
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116 |
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117 $ hg add dir/n $d2args |
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118 $ touch $TESTTMP/status-race-lock |
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119 $ wait |
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120 |
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121 The file should in a "added" state |
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122 |
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123 $ hg status |
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124 A dir/n |
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125 A dir/o |
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126 R dir/nested/m |
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127 ? p |
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128 ? q |
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129 |
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130 The status process should return a consistent result and not crash. |
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131 |
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132 $ cat $TESTTMP/status-race-lock.out |
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133 A dir/n |
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134 A dir/o |
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135 R dir/nested/m |
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136 ? p |
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137 ? q |
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138 $ cat $TESTTMP/status-race-lock.log |
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139 |
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140 final cleanup |
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141 |
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142 $ rm $TESTTMP/status-race-lock $TESTTMP/status-race-lock.waiting |
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143 $ cd .. |