Add new files resulting from merging in the 2.4.0 line. Many of these
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 a5019735-40e9-0310-863c-91ae7b9d1cf9
diff --git a/memcheck/tests/pointer-trace.c b/memcheck/tests/pointer-trace.c
new file mode 100644
index 0000000..89e3cad
--- /dev/null
+++ b/memcheck/tests/pointer-trace.c
@@ -0,0 +1,59 @@
+/*
+ Make sure that leak-check's pointer tracing avoids traps
+ */
+
+#include <stdio.h>
+#include "memcheck/memcheck.h"
+#include <sys/mman.h>
+#include <stdlib.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+int main()
+{
+ const int ptrbits = sizeof(void *) * 8;
+ const int stepbits = 14;
+ const int stepsize = (1 << stepbits);
+ const int nptrs = 1 << (ptrbits - stepbits);
+
+ char **volatile ptrs;
+ int i;
+ int fd;
+ char *map;
+
+ ptrs = malloc(nptrs * sizeof(char *));
+ for(i = 0; i < nptrs; i++)
+ ptrs[i] = (char *)(i << stepbits);
+
+ /* lay some traps */
+ map = mmap(0, stepsize * 2, PROT_NONE, MAP_PRIVATE|MAP_NORESERVE|MAP_ANONYMOUS, -1, 0);
+ if (map == (char *)-1)
+ perror("trap 1 failed");
+
+ map = mmap(0, stepsize * 2, PROT_WRITE, MAP_PRIVATE|MAP_NORESERVE|MAP_ANONYMOUS, -1, 0);
+ if (map == (char *)-1)
+ perror("trap 2 failed");
+
+ /* non-zero mmap of a zero-length file -> SIGBUS */
+ fd = open("./pointer-trace-test-file", O_RDWR | O_CREAT | O_EXCL, 0600);
+ unlink("./pointer-trace-test-file");
+
+ map = mmap(0, stepsize * 2, PROT_WRITE|PROT_READ, MAP_PRIVATE, fd, 0);
+ if (map == (char *)-1)
+ perror("trap 3 failed");
+ //printf("trap 3 = %p-%p\n", map, map+stepsize*2);
+
+ map = mmap(0, 256*1024, PROT_NONE, MAP_PRIVATE|MAP_NORESERVE|MAP_ANONYMOUS, -1, 0);
+ if (map == (char *)-1)
+ perror("trap 4 failed");
+ else {
+ munmap(map, 256*1024);
+ VALGRIND_MAKE_READABLE(map, 256*1024); /* great big fat lie */
+ }
+
+ VALGRIND_DO_LEAK_CHECK;
+
+ ptrs = 0;
+
+ return 0;
+}