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Use memmove() not memcpy() to slide some pointers down.

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The previous coding here was formally undefined, though it seems to
accidentally work on most platforms in the buildfarm.  Caught by some
OpenBSD platforms in which libc contains an assertion check for
overlapping areas passed to memcpy().

Thomas Munro
This commit is contained in:
Tom Lane
2016-04-27 18:19:28 -04:00
parent 4c804fbdfb
commit ad520ec4ac
1 changed files with 6 additions and 6 deletions
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12
src/test/isolation/isolationtester.c
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@ -554,8 +554,8 @@ run_permutation(TestSpec *testspec, int nsteps, Step **steps)
/* Remove that step from the waiting[] array. */
if (w + 1 < nwaiting)
memcpy(&waiting[w], &waiting[w + 1],
(nwaiting - (w + 1)) * sizeof(Step *));
memmove(&waiting[w], &waiting[w + 1],
(nwaiting - (w + 1)) * sizeof(Step *));
nwaiting--;
break;
@ -582,8 +582,8 @@ run_permutation(TestSpec *testspec, int nsteps, Step **steps)
/* This one finished, too! */
errorstep[nerrorstep++] = waiting[w];
if (w + 1 < nwaiting)
memcpy(&waiting[w], &waiting[w + 1],
(nwaiting - (w + 1)) * sizeof(Step *));
memmove(&waiting[w], &waiting[w + 1],
(nwaiting - (w + 1)) * sizeof(Step *));
nwaiting--;
}
}
@ -614,8 +614,8 @@ run_permutation(TestSpec *testspec, int nsteps, Step **steps)
{
errorstep[nerrorstep++] = waiting[w];
if (w + 1 < nwaiting)
memcpy(&waiting[w], &waiting[w + 1],
(nwaiting - (w + 1)) * sizeof(Step *));
memmove(&waiting[w], &waiting[w + 1],
(nwaiting - (w + 1)) * sizeof(Step *));
nwaiting--;
}
}