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https://github.com/Zenithsiz/ftmemsim-valgrind.git
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275c1897dc
Revision 14976 causes a regression : stacktrace produced when the stack has not yet been extended to cover SP will only contain one element, as the stack limits are considered to be the limits of the resvn segment. This patch fixes that, by taking Resvn/SmUpper segment into account to properly compute the limits. It also contains a new regtest that fails with the trunk (only one function in the stacktrace) and succeeds with this patch (the 2 expected functions). git-svn-id: svn://svn.valgrind.org/valgrind/trunk@15046
24 lines
604 B
C
24 lines
604 B
C
#include <stdio.h>
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__attribute__((noinline)) void big(void)
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{
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/* The below ensures the stack grows a lot. However, we hope the stack
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extension is not done yet, as no memory has been read/written. */
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volatile char c[200000];
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/* Access only the higher part of the stack, to avoid mapping SP */
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/* The below 2 printfs should produce deterministic output, whatever
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the random value of c[]. */
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if (c[200000 - 1])
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fprintf(stderr, "Accessing fresh %s\n", "stack");
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else
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fprintf(stderr, "Accessing %s stack\n", "fresh");
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}
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int main(void )
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{
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big();
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return 0;
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}
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