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top: harden management of 'Hide_pid' array allocations

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While setting the size of that Hide_pid array to equal
total pids high water mark was probably safe, in truth
there is no real relationship. At some point one could
exceed that HWM if the 'v' toggle was used extensively
and at least 1 of those entries remained non-negative.

This commit simply divorces Hide_tot from the pids HWM
and bases Hide_pid array size on actual run-time need.

Signed-off-by: Jim Warner <james.warner@comcast.net>
This commit is contained in:
Jim Warner 2018-11-01 00:00:00 -05:00 committed by Craig Small
parent 22ae537707
commit ca9142767c
1 changed files with 13 additions and 6 deletions
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19
top/top.c
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@ -4331,7 +4331,6 @@ static void forest_begin (WIN_t *q) {
if (hwmsav < PIDSmaxt) { // grow, but never shrink
hwmsav = PIDSmaxt;
Tree_ppt = alloc_r(Tree_ppt, sizeof(void *) * hwmsav);
Hide_pid = alloc_r(Hide_pid, sizeof(int) * hwmsav);
}
#ifndef TREE_SCANALL
@ -4986,11 +4985,19 @@ static void keys_task (int ch) {
break;
}
}
if (i == Hide_tot) Hide_pid[Hide_tot++] = pid;
// plenty of room, but if everything's expanded let's reset ...
for (i = 0; i < Hide_tot; i++)
if (Hide_pid[i] > 0) break;
if (i == Hide_tot) Hide_tot = 0;
if (i == Hide_tot) {
static int totsav;
if (Hide_tot >= totsav) {
totsav += 128;
Hide_pid = alloc_r(Hide_pid, sizeof(int) * totsav);
}
Hide_pid[Hide_tot++] = pid;
} else {
// if everything's expanded, let's empty the array ...
for (i = 0; i < Hide_tot; i++)
if (Hide_pid[i] > 0) break;
if (i == Hide_tot) Hide_tot = 0;
}
}
}
break;