mirror of
https://github.com/Zenithsiz/ftmemsim-valgrind.git
synced 2026-02-04 10:21:20 +00:00
7c542ccd39
seem to be simply duplication of the x86 instruction set tests into the addrcheck and helgrind trees. I'm not sure what this duplication achieves. git-svn-id: svn://svn.valgrind.org/valgrind/trunk@3264
60 lines
1.4 KiB
C
60 lines
1.4 KiB
C
/*
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Make sure that leak-check's pointer tracing avoids traps
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*/
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#include <stdio.h>
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#include "memcheck/memcheck.h"
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#include <sys/mman.h>
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#include <stdlib.h>
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#include <fcntl.h>
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#include <unistd.h>
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int main()
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{
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const int ptrbits = sizeof(void *) * 8;
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const int stepbits = 14;
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const int stepsize = (1 << stepbits);
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const int nptrs = 1 << (ptrbits - stepbits);
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char **volatile ptrs;
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int i;
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int fd;
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char *map;
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ptrs = malloc(nptrs * sizeof(char *));
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for(i = 0; i < nptrs; i++)
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ptrs[i] = (char *)(i << stepbits);
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/* lay some traps */
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map = mmap(0, stepsize * 2, PROT_NONE, MAP_PRIVATE|MAP_NORESERVE|MAP_ANONYMOUS, -1, 0);
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if (map == (char *)-1)
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perror("trap 1 failed");
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map = mmap(0, stepsize * 2, PROT_WRITE, MAP_PRIVATE|MAP_NORESERVE|MAP_ANONYMOUS, -1, 0);
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if (map == (char *)-1)
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perror("trap 2 failed");
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/* non-zero mmap of a zero-length file -> SIGBUS */
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fd = open("./pointer-trace-test-file", O_RDWR | O_CREAT | O_EXCL, 0600);
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unlink("./pointer-trace-test-file");
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map = mmap(0, stepsize * 2, PROT_WRITE|PROT_READ, MAP_PRIVATE, fd, 0);
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if (map == (char *)-1)
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perror("trap 3 failed");
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//printf("trap 3 = %p-%p\n", map, map+stepsize*2);
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map = mmap(0, 256*1024, PROT_NONE, MAP_PRIVATE|MAP_NORESERVE|MAP_ANONYMOUS, -1, 0);
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if (map == (char *)-1)
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perror("trap 4 failed");
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else {
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munmap(map, 256*1024);
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VALGRIND_MAKE_READABLE(map, 256*1024); /* great big fat lie */
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}
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VALGRIND_DO_LEAK_CHECK;
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ptrs = 0;
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return 0;
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}
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