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diff --git a/include/typemax.h b/include/typemax.h
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--- a/include/typemax.h
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+++ b/include/typemax.h
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@@ -35,14 +35,23 @@
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# define TYPE_SIGNED(t) (! ((t) 0 < (t) -1))
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#endif
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+#ifndef TYPE_SIGNED_MAGNITUDE
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+# define TYPE_SIGNED_MAGNITUDE(t) ((t) ~ (t) 0 < (t) -1)
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+#endif
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+
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+#ifndef TYPE_WIDTH
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+# define TYPE_WIDTH(t) (sizeof (t) * CHAR_BIT)
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+#endif
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+
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#ifndef TYPE_MINIMUM
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-# define TYPE_MINIMUM(t) ((t) (TYPE_SIGNED (t) \
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- ? ~ (t) 0 << (sizeof (t) * CHAR_BIT - 1) \
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- : (t) 0))
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+# define TYPE_MINIMUM(t) ((t) ~ TYPE_MAXIMUM (t))
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#endif
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#ifndef TYPE_MAXIMUM
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-# define TYPE_MAXIMUM(t) ((t) (~ (t) 0 - TYPE_MINIMUM (t)))
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+# define TYPE_MAXIMUM(t) \
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+ ((t) (! TYPE_SIGNED (t) \
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+ ? (t) -1 \
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+ : ((((t) 1 << (TYPE_WIDTH (t) - 2)) - 1) * 2 + 1)))
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#endif
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#ifdef HAVE_LONG_LONG
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diff --git a/jobs.c b/jobs.c
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--- a/jobs.c
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+++ b/jobs.c
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@@ -72,6 +72,8 @@
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#include "execute_cmd.h"
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#include "flags.h"
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+#include "typemax.h"
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+
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#include "builtins/builtext.h"
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#include "builtins/common.h"
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@@ -92,7 +94,7 @@ extern int killpg __P((pid_t, int));
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#endif
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#if !MAX_CHILD_MAX
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-# define MAX_CHILD_MAX 8192
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+# define MAX_CHILD_MAX 32768
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#endif
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#if !defined (DEBUG)
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@@ -751,7 +753,7 @@ stop_pipeline (async, deferred)
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static void
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bgp_resize ()
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{
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- ps_index_t nsize;
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+ ps_index_t nsize, nsize_cur, nsize_max;
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ps_index_t psi;
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if (bgpids.nalloc == 0)
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@@ -765,11 +767,20 @@ bgp_resize ()
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else
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nsize = bgpids.nalloc;
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- while (nsize < js.c_childmax)
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- nsize *= 2;
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+ nsize_max = TYPE_MAXIMUM (ps_index_t);
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+ nsize_cur = (ps_index_t)js.c_childmax;
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+ if (nsize_cur < 0) /* overflow */
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+ nsize_cur = MAX_CHILD_MAX;
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- if (bgpids.nalloc < js.c_childmax)
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- {
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+ while (nsize > 0 && nsize < nsize_cur) /* > 0 should catch overflow */
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+ nsize <<= 1;
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+ if (nsize > nsize_max || nsize <= 0) /* overflow? */
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+ nsize = nsize_max;
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+ if (nsize > MAX_CHILD_MAX)
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+ nsize = nsize_max = MAX_CHILD_MAX; /* hard cap */
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+
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+ if (bgpids.nalloc < nsize_cur && bgpids.nalloc < nsize_max)
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+ {
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bgpids.storage = (struct pidstat *)xrealloc (bgpids.storage, nsize * sizeof (struct pidstat));
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for (psi = bgpids.nalloc; psi < nsize; psi++)
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@@ -787,7 +798,7 @@ bgp_getindex ()
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{
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ps_index_t psi;
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- if (bgpids.nalloc < js.c_childmax || bgpids.head >= bgpids.nalloc)
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+ if (bgpids.nalloc < (ps_index_t)js.c_childmax || bgpids.head >= bgpids.nalloc)
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bgp_resize ();
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pshash_delindex (bgpids.head); /* XXX - clear before reusing */
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