42 lines
1.3 KiB
Diff
42 lines
1.3 KiB
Diff
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# HG changeset patch
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# User Victor Stinner <victor.stinner@gmail.com>
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# Date 1423661015 -3600
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# Node ID 689092296ad31951f8f919fc06b49450e648e93d
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# Parent 645f3d750be139ce0198e15e221da07b22289a92
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Issue #23433: Fix faulthandler._stack_overflow()
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Fix undefined behaviour: don't compare pointers. Use Py_uintptr_t type instead
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of void*. It fixes test_faulthandler on Fedora 22 which now uses GCC 5.
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diff --git a/Modules/faulthandler.c b/Modules/faulthandler.c
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--- a/Modules/faulthandler.c
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+++ b/Modules/faulthandler.c
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@@ -911,12 +911,12 @@ faulthandler_fatal_error_py(PyObject *se
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}
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#if defined(HAVE_SIGALTSTACK) && defined(HAVE_SIGACTION)
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-static void*
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-stack_overflow(void *min_sp, void *max_sp, size_t *depth)
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+static Py_uintptr_t
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+stack_overflow(Py_uintptr_t min_sp, Py_uintptr_t max_sp, size_t *depth)
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{
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/* allocate 4096 bytes on the stack at each call */
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unsigned char buffer[4096];
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- void *sp = &buffer;
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+ Py_uintptr_t sp = (Py_uintptr_t)&buffer;
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*depth += 1;
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if (sp < min_sp || max_sp < sp)
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return sp;
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@@ -929,7 +929,8 @@ static PyObject *
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faulthandler_stack_overflow(PyObject *self)
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{
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size_t depth, size;
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- char *sp = (char *)&depth, *stop;
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+ Py_uintptr_t sp = (Py_uintptr_t)&depth;
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+ Py_uintptr_t stop;
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depth = 0;
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stop = stack_overflow(sp - STACK_OVERFLOW_MAX_SIZE,
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