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top: fix the collapsed children cpu segmentation fault

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While that 'Hide_cpu' value will always be zero unless
there are collapsed children, the damn array will only
be present when a window's in 'Show_FOREST' view mode.

Reference(s):
https://www.freelists.org/post/procps/important-improvements-to-top,8

Signed-off-by: Jim Warner <james.warner@comcast.net>
This commit is contained in:
Jim Warner 2018-07-17 00:00:00 -05:00 committed by Craig Small
parent 8626141d8f
commit 786bffc253
1 changed files with 4 additions and 4 deletions
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8
top/top.c
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@ -4692,7 +4692,7 @@ static int Tree_idx; // frame_make resets to zero
static int *Hide_pid; // collapsible process array
static int Hide_tot; // total used in above array
#ifndef TREE_VCPUOFF
static int *Hide_cpu; // accum tics from collapsed
static unsigned *Hide_cpu; // accum tics from collapsed
#endif
/*
@ -4749,7 +4749,7 @@ static void forest_create (WIN_t *q) {
Tree_ppt = alloc_r(Tree_ppt, sizeof(proc_t*) * hwmsav);
Hide_pid = alloc_r(Hide_pid, sizeof(int) * hwmsav);
#ifndef TREE_VCPUOFF
Hide_cpu = alloc_r(Hide_cpu, sizeof(int) * hwmsav);
Hide_cpu = alloc_r(Hide_cpu, sizeof(unsigned) * hwmsav);
#endif
}
@ -4761,7 +4761,7 @@ static void forest_create (WIN_t *q) {
forest_adds(i, 0); // add a parent and its children
}
#ifndef TREE_VCPUOFF
memset(Hide_cpu, 0, sizeof(int) * Frame_maxtask);
memset(Hide_cpu, 0, sizeof(unsigned) * Frame_maxtask);
#endif
/* we're borrowing some pad bytes in the proc_t,
pad_2: 'x' means a collapsed thread, 'z' means an unseen child
@ -6002,7 +6002,7 @@ static const char *task_show (const WIN_t *q, const int idx) {
{ float u = (float)p->pcpu;
#ifndef TREE_VCPUOFF
// Hide_cpu entry is always zero, unless we're a collapsed parent
u += Hide_cpu[idx];
if (CHKw(q, Show_FOREST)) u += Hide_cpu[idx];
u *= Frame_etscale;
if (p->pad_2 != 'x' && u > 100.0 * p->nlwp) u = 100.0 * p->nlwp;
#else