Bash-4.3 distribution sources and documentation

lib/malloc/getpagesize.h

@@ -32,7 +32,7 @@
 #endif
 
 #if !defined (getpagesize)
-#  ifndef _MINIX
+#  if defined (HAVE_SYS_PARAM_H)
 #    include <sys/param.h>
 #  endif
 #  if defined (PAGESIZE)

lib/malloc/imalloc.h

@@ -45,11 +45,11 @@
 #  define NULL 0
 #endif
 
-#if !defined (__STRING)
+#if !defined (CPP_STRING)
 #  if defined (HAVE_STRINGIZE)
-#    define __STRING(x) #x
+#    define CPP_STRING(x) #x
 #  else
-#    define __STRING(x) "x"
+#    define CPP_STRING(x) "x"
 #  endif /* !HAVE_STRINGIZE */
 #endif /* !__STRING */
 
@@ -165,4 +165,9 @@ do {									\
 #  define _(x)	x
 #endif
 
+#include <signal.h>
+
+extern void _malloc_block_signals __P((sigset_t *, sigset_t *));
+extern void _malloc_unblock_signals __P((sigset_t *, sigset_t *));
+
 #endif /* _IMALLOC_H */

lib/malloc/malloc.c

@@ -172,7 +172,7 @@ typedef union _malloc_guard {
 #define ASSERT(p) \
   do \
     { \
-      if (!(p)) xbotch((PTR_T)0, ERR_ASSERT_FAILED, __STRING(p), file, line); \
+      if (!(p)) xbotch((PTR_T)0, ERR_ASSERT_FAILED, CPP_STRING(p), file, line); \
     } \
   while (0)
 
@@ -265,7 +265,7 @@ extern char *sbrk ();
 #endif /* !HAVE_DECL_SBRK */
 
 #ifdef SHELL
-extern int interrupt_immediately;
+extern int interrupt_immediately, running_trap;
 extern int signal_is_trapped __P((int));
 #endif
 
@@ -498,8 +498,8 @@ xsplit (mp, nu)
   busy[nbuck] = 0;
 }
 
-static void
-block_signals (setp, osetp)
+void
+_malloc_block_signals (setp, osetp)
      sigset_t *setp, *osetp;
 {
 #ifdef HAVE_POSIX_SIGNALS
@@ -513,8 +513,8 @@ block_signals (setp, osetp)
 #endif
 }
 
-static void
-unblock_signals (setp, osetp)
+void
+_malloc_unblock_signals (setp, osetp)
      sigset_t *setp, *osetp;
 {
 #ifdef HAVE_POSIX_SIGNALS
@@ -562,10 +562,14 @@ morecore (nu)
   /* Block all signals in case we are executed from a signal handler. */
   blocked_sigs = 0;
 #ifdef SHELL
-  if (interrupt_immediately || signal_is_trapped (SIGINT) || signal_is_trapped (SIGCHLD))
+#  if defined (SIGCHLD)
+  if (interrupt_immediately || running_trap || signal_is_trapped (SIGINT) || signal_is_trapped (SIGCHLD))
+#  else
+  if (interrupt_immediately || running_trap || signal_is_trapped (SIGINT))
+#  endif
 #endif
     {
-      block_signals (&set, &oset);
+      _malloc_block_signals (&set, &oset);
       blocked_sigs = 1;
     }
 
@@ -652,7 +656,7 @@ morecore (nu)
 
 morecore_done:
   if (blocked_sigs)
-    unblock_signals (&set, &oset);
+    _malloc_unblock_signals (&set, &oset);
 }
 
 static void
@@ -901,10 +905,10 @@ internal_free (mem, file, line, flags)
   if (mg.i != p->mh_nbytes)
     xbotch (mem, ERR_ASSERT_FAILED, _("free: start and end chunk sizes differ"), file, line);
 
-#if 1
-  if (nunits >= LESSCORE_MIN && ((char *)p + binsize(nunits) == memtop))
+#if GLIBC21
+  if (nunits >= LESSCORE_MIN && ((char *)p + binsize(nunits) == sbrk (0)))
 #else
-  if (((char *)p + binsize(nunits) == memtop) && nunits >= LESSCORE_MIN)
+  if (nunits >= LESSCORE_MIN && ((char *)p + binsize(nunits) == memtop))
 #endif
     {
       /* If above LESSCORE_FRC, give back unconditionally.  This should be set

lib/malloc/table.c

@@ -28,6 +28,11 @@
 #include "imalloc.h"
 #include "table.h"
 
+#ifdef SHELL
+extern int interrupt_immediately, running_trap;
+extern int signal_is_trapped __P((int));
+#endif
+
 extern int malloc_register;
 
 #ifdef MALLOC_REGISTER
@@ -168,6 +173,18 @@ mregister_alloc (tag, mem, size, file, line)
      int line;
 {
   mr_table_t *tentry;
+  sigset_t set, oset;
+  int blocked_sigs;
+
+  /* Block all signals in case we are executed from a signal handler. */
+  blocked_sigs = 0;
+#ifdef SHELL
+  if (interrupt_immediately || running_trap || signal_is_trapped (SIGINT) || signal_is_trapped (SIGCHLD))
+#endif
+    {
+      _malloc_block_signals (&set, &oset);
+      blocked_sigs = 1;
+    }
 
   tentry = find_entry (mem, FIND_ALLOC);
 
@@ -175,6 +192,8 @@ mregister_alloc (tag, mem, size, file, line)
     {
       /* oops.  table is full.  punt. */
       fprintf (stderr, _("register_alloc: alloc table is full with FIND_ALLOC?\n"));
+      if (blocked_sigs)
+	_malloc_unblock_signals (&set, &oset);
       return;
     }
   
@@ -194,6 +213,9 @@ mregister_alloc (tag, mem, size, file, line)
 
   if (tentry != &mem_overflow)
     table_allocated++;
+
+  if (blocked_sigs)
+    _malloc_unblock_signals (&set, &oset);
 }
 
 void
@@ -204,6 +226,18 @@ mregister_free (mem, size, file, line)
      int line;
 {
   mr_table_t *tentry;
+  sigset_t set, oset;
+  int blocked_sigs;
+
+  /* Block all signals in case we are executed from a signal handler. */
+  blocked_sigs = 0;
+#ifdef SHELL
+  if (interrupt_immediately || running_trap || signal_is_trapped (SIGINT) || signal_is_trapped (SIGCHLD))
+#endif
+    {
+      _malloc_block_signals (&set, &oset);
+      blocked_sigs = 1;
+    }
 
   tentry = find_entry (mem, FIND_EXIST);
   if (tentry == 0)
@@ -212,6 +246,8 @@ mregister_free (mem, size, file, line)
 #if 0
       fprintf (stderr, "register_free: %p not in allocation table?\n", mem);
 #endif
+      if (blocked_sigs)
+	_malloc_unblock_signals (&set, &oset);
       return;
     }
   if (tentry->flags & MT_FREE)
@@ -228,6 +264,9 @@ mregister_free (mem, size, file, line)
 
   if (tentry != &mem_overflow)
     table_allocated--;
+
+  if (blocked_sigs)
+    _malloc_unblock_signals (&set, &oset);
 }
 
 /* If we ever add more flags, this will require changes. */