bash/SOURCES/bash-5.0-bgp-resize.patch
2021-09-09 14:59:23 +00:00

96 lines
2.4 KiB
Diff

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