Mercurial > hg
annotate tests/test-parseindex.t @ 46858:85e3a630cad9
revlog: move the details of revlog "v2" index inside revlog.utils.constants
the revlog module is quite large and this kind of format information would handy
for other module. So let us start to gather this information about the format in
a more appropriate place.
We update various reference to this information to use the new "source of truth"
in the process.
Differential Revision: https://phab.mercurial-scm.org/D10305
author | Pierre-Yves David <pierre-yves.david@octobus.net> |
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date | Mon, 05 Apr 2021 12:21:12 +0200 |
parents | 61e7464477ac |
children | 42d2b31cee0b |
rev | line source |
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1 revlog.parseindex must be able to parse the index file even if |
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2 an index entry is split between two 64k blocks. The ideal test |
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3 would be to create an index file with inline data where |
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4 64k < size < 64k + 64 (64k is the size of the read buffer, 64 is |
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5 the size of an index entry) and with an index entry starting right |
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6 before the 64k block boundary, and try to read it. |
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7 We approximate that by reducing the read buffer to 1 byte. |
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8 |
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9 $ hg init a |
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10 $ cd a |
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11 $ echo abc > foo |
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12 $ hg add foo |
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13 $ hg commit -m 'add foo' |
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14 $ echo >> foo |
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15 $ hg commit -m 'change foo' |
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16 $ hg log -r 0: |
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17 changeset: 0:7c31755bf9b5 |
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18 user: test |
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19 date: Thu Jan 01 00:00:00 1970 +0000 |
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20 summary: add foo |
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21 |
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22 changeset: 1:26333235a41c |
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23 tag: tip |
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24 user: test |
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25 date: Thu Jan 01 00:00:00 1970 +0000 |
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26 summary: change foo |
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27 |
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28 $ cat >> test.py << EOF |
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29 > from __future__ import print_function |
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30 > from mercurial import changelog, node, pycompat, vfs |
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31 > |
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32 > class singlebyteread(object): |
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33 > def __init__(self, real): |
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34 > self.real = real |
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35 > |
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36 > def read(self, size=-1): |
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37 > if size == 65536: |
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38 > size = 1 |
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39 > return self.real.read(size) |
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40 > |
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41 > def __getattr__(self, key): |
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42 > return getattr(self.real, key) |
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43 > |
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44 > def __enter__(self): |
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45 > self.real.__enter__() |
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46 > return self |
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47 > |
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48 > def __exit__(self, *args, **kwargs): |
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49 > return self.real.__exit__(*args, **kwargs) |
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50 > |
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51 > def opener(*args): |
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52 > o = vfs.vfs(*args) |
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53 > def wrapper(*a, **kwargs): |
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54 > f = o(*a, **kwargs) |
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55 > return singlebyteread(f) |
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56 > wrapper.options = o.options |
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57 > return wrapper |
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58 > |
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59 > cl = changelog.changelog(opener(b'.hg/store')) |
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60 > print(len(cl), 'revisions:') |
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61 > for r in cl: |
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62 > print(pycompat.sysstr(node.short(cl.node(r)))) |
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63 > EOF |
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64 $ "$PYTHON" test.py |
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65 2 revisions: |
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66 7c31755bf9b5 |
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67 26333235a41c |
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68 |
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69 $ cd .. |
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70 |
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71 #if no-pure |
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72 |
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73 Test SEGV caused by bad revision passed to reachableroots() (issue4775): |
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74 |
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75 $ cd a |
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76 |
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77 $ "$PYTHON" <<EOF |
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78 > from __future__ import print_function |
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79 > from mercurial import changelog, vfs |
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80 > cl = changelog.changelog(vfs.vfs(b'.hg/store')) |
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81 > print('good heads:') |
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82 > for head in [0, len(cl) - 1, -1]: |
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83 > print('%s: %r' % (head, cl.reachableroots(0, [head], [0]))) |
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84 > print('bad heads:') |
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85 > for head in [len(cl), 10000, -2, -10000, None]: |
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86 > print('%s:' % head, end=' ') |
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87 > try: |
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88 > cl.reachableroots(0, [head], [0]) |
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89 > print('uncaught buffer overflow?') |
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90 > except (IndexError, TypeError) as inst: |
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91 > print(inst) |
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92 > print('good roots:') |
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93 > for root in [0, len(cl) - 1, -1]: |
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94 > print('%s: %r' % (root, cl.reachableroots(root, [len(cl) - 1], [root]))) |
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95 > print('out-of-range roots are ignored:') |
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96 > for root in [len(cl), 10000, -2, -10000]: |
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97 > print('%s: %r' % (root, cl.reachableroots(root, [len(cl) - 1], [root]))) |
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98 > print('bad roots:') |
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99 > for root in [None]: |
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100 > print('%s:' % root, end=' ') |
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101 > try: |
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102 > cl.reachableroots(root, [len(cl) - 1], [root]) |
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103 > print('uncaught error?') |
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104 > except TypeError as inst: |
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105 > print(inst) |
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106 > EOF |
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107 good heads: |
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108 0: [0] |
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109 1: [0] |
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110 -1: [] |
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111 bad heads: |
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112 2: head out of range |
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113 10000: head out of range |
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114 -2: head out of range |
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115 -10000: head out of range |
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116 None: an integer is required( .got type NoneType.)? (re) |
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117 good roots: |
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118 0: [0] |
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119 1: [1] |
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120 -1: [-1] |
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121 out-of-range roots are ignored: |
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122 2: [] |
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123 10000: [] |
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124 -2: [] |
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125 -10000: [] |
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126 bad roots: |
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127 None: an integer is required( .got type NoneType.)? (re) |
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128 |
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129 $ cd .. |
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130 |
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131 Test corrupted p1/p2 fields that could cause SEGV at parsers.c: |
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132 |
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133 $ mkdir invalidparent |
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134 $ cd invalidparent |
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135 |
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136 $ hg clone --pull -q --config phases.publish=False ../a limit --config format.sparse-revlog=no |
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137 $ hg clone --pull -q --config phases.publish=False ../a neglimit --config format.sparse-revlog=no |
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138 $ hg clone --pull -q --config phases.publish=False ../a segv --config format.sparse-revlog=no |
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139 $ rm -R limit/.hg/cache neglimit/.hg/cache segv/.hg/cache |
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140 |
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141 $ "$PYTHON" <<EOF |
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142 > data = open("limit/.hg/store/00changelog.i", "rb").read() |
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143 > poisons = [ |
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144 > (b'limit', b'\0\0\0\x02'), |
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145 > (b'neglimit', b'\xff\xff\xff\xfe'), |
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146 > (b'segv', b'\0\x01\0\0'), |
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147 > ] |
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148 > for n, p in poisons: |
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149 > # corrupt p1 at rev0 and p2 at rev1 |
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150 > d = data[:24] + p + data[28:127 + 28] + p + data[127 + 32:] |
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151 > open(n + b"/.hg/store/00changelog.i", "wb").write(d) |
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152 > EOF |
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153 |
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154 $ hg -R limit debugrevlogindex -f1 -c |
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155 rev flag size link p1 p2 nodeid |
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156 0 0000 62 0 2 -1 7c31755bf9b5 |
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157 1 0000 65 1 0 2 26333235a41c |
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158 |
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159 $ hg -R limit debugdeltachain -c |
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160 rev chain# chainlen prev delta size rawsize chainsize ratio lindist extradist extraratio |
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161 0 1 1 -1 base 63 62 63 1.01613 63 0 0.00000 |
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162 1 2 1 -1 base 66 65 66 1.01538 66 0 0.00000 |
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163 |
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164 $ hg -R neglimit debugrevlogindex -f1 -c |
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165 rev flag size link p1 p2 nodeid |
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166 0 0000 62 0 -2 -1 7c31755bf9b5 |
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167 1 0000 65 1 0 -2 26333235a41c |
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168 |
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169 $ hg -R segv debugrevlogindex -f1 -c |
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170 rev flag size link p1 p2 nodeid |
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171 0 0000 62 0 65536 -1 7c31755bf9b5 |
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172 1 0000 65 1 0 65536 26333235a41c |
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173 |
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174 $ hg -R segv debugdeltachain -c |
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175 rev chain# chainlen prev delta size rawsize chainsize ratio lindist extradist extraratio |
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176 0 1 1 -1 base 63 62 63 1.01613 63 0 0.00000 |
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177 1 2 1 -1 base 66 65 66 1.01538 66 0 0.00000 |
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178 |
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179 $ cat <<EOF > test.py |
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180 > from __future__ import print_function |
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181 > import sys |
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182 > from mercurial import changelog, pycompat, vfs |
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183 > cl = changelog.changelog(vfs.vfs(pycompat.fsencode(sys.argv[1]))) |
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184 > n0, n1 = cl.node(0), cl.node(1) |
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185 > ops = [ |
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186 > ('reachableroots', |
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187 > lambda: cl.index.reachableroots2(0, [1], [0], False)), |
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188 > ('compute_phases_map_sets', lambda: cl.computephases({1: {cl.node(0)}})), |
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189 > ('index_headrevs', lambda: cl.headrevs()), |
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190 > ('find_gca_candidates', lambda: cl.commonancestorsheads(n0, n1)), |
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191 > ('find_deepest', lambda: cl.ancestor(n0, n1)), |
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192 > ] |
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193 > for l, f in ops: |
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194 > print(l + ':', end=' ') |
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195 > try: |
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196 > f() |
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197 > print('uncaught buffer overflow?') |
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198 > except ValueError as inst: |
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199 > print(inst) |
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200 > EOF |
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201 |
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202 $ "$PYTHON" test.py limit/.hg/store |
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203 reachableroots: parent out of range |
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204 compute_phases_map_sets: parent out of range |
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205 index_headrevs: parent out of range |
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206 find_gca_candidates: parent out of range |
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207 find_deepest: parent out of range |
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208 $ "$PYTHON" test.py neglimit/.hg/store |
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209 reachableroots: parent out of range |
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210 compute_phases_map_sets: parent out of range |
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211 index_headrevs: parent out of range |
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212 find_gca_candidates: parent out of range |
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213 find_deepest: parent out of range |
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214 $ "$PYTHON" test.py segv/.hg/store |
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215 reachableroots: parent out of range |
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216 compute_phases_map_sets: parent out of range |
82d6a35cf432
parsers: fix buffer overflow by invalid parent revision read from revlog
Yuya Nishihara <yuya@tcha.org>
parents:
16913
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217 index_headrevs: parent out of range |
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parsers: fix buffer overflow by invalid parent revision read from revlog
Yuya Nishihara <yuya@tcha.org>
parents:
16913
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218 find_gca_candidates: parent out of range |
82d6a35cf432
parsers: fix buffer overflow by invalid parent revision read from revlog
Yuya Nishihara <yuya@tcha.org>
parents:
16913
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219 find_deepest: parent out of range |
82d6a35cf432
parsers: fix buffer overflow by invalid parent revision read from revlog
Yuya Nishihara <yuya@tcha.org>
parents:
16913
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220 |
82d6a35cf432
parsers: fix buffer overflow by invalid parent revision read from revlog
Yuya Nishihara <yuya@tcha.org>
parents:
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221 $ cd .. |
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1619563959b3
tests: disable test of buffer overflow in parsers.c if --pure
Yuya Nishihara <yuya@tcha.org>
parents:
25810
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222 |
1619563959b3
tests: disable test of buffer overflow in parsers.c if --pure
Yuya Nishihara <yuya@tcha.org>
parents:
25810
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223 #endif |