72 lines
2 KiB
Diff
72 lines
2 KiB
Diff
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http://bugs.python.org/issue2422 - adaption of the patch there to honour our G_SLICE
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--- misc/Python-2.6.1/Objects/obmalloc.c 2011-07-26 13:10:12.668380720 +0100
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+++ misc/build/Python-2.6.1/Objects/obmalloc.c 2011-07-26 13:17:41.951444953 +0100
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@@ -1,7 +1,18 @@
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#include "Python.h"
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+#include <stdlib.h>
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#ifdef WITH_PYMALLOC
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+static int running_with_system_allocator = -1;
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+
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+/* If we're using GCC, use __builtin_expect() to reduce overhead of
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+ the allocator checks */
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+#if defined(__GNUC__) && (__GNUC__ > 2) && defined(__OPTIMIZE__)
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+# define UNLIKELY(value) __builtin_expect((value), 0)
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+#else
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+# define UNLIKELY(value) (value)
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+#endif
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+
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/* An object allocator for Python.
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Here is an introduction to the layers of the Python memory architecture,
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@@ -728,6 +739,11 @@
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poolp next;
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uint size;
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+ if (UNLIKELY(running_with_system_allocator == -1))
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+ running_with_system_allocator = (getenv("G_SLICE") != NULL);
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+ if (UNLIKELY(running_with_system_allocator))
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+ goto redirect;
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+
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/*
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* Limit ourselves to PY_SSIZE_T_MAX bytes to prevent security holes.
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* Most python internals blindly use a signed Py_ssize_t to track
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@@ -927,6 +943,9 @@
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if (p == NULL) /* free(NULL) has no effect */
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return;
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+ if (UNLIKELY(running_with_system_allocator > 0))
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+ goto redirect;
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+
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pool = POOL_ADDR(p);
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if (Py_ADDRESS_IN_RANGE(p, pool)) {
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/* We allocated this address. */
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@@ -1121,6 +1140,7 @@
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return;
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}
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+redirect:
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/* We didn't allocate this address. */
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free(p);
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}
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@@ -1150,6 +1170,10 @@
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if (nbytes > PY_SSIZE_T_MAX)
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return NULL;
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+ /* Treat running_with_system_allocator == -1 the same as 0 */
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+ if (UNLIKELY(running_with_system_allocator > 0))
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+ goto redirect;
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+
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pool = POOL_ADDR(p);
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if (Py_ADDRESS_IN_RANGE(p, pool)) {
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/* We're in charge of this block */
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@@ -1177,6 +1201,7 @@
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}
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return bp;
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}
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+redirect:
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/* We're not managing this block. If nbytes <=
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* SMALL_REQUEST_THRESHOLD, it's tempting to try to take over this
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* block. However, if we do, we need to copy the valid data from
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