#include <dlfcn.h> #include <mcheck.h> #include <stdio.h> #include <stdlib.h> typedef int (*fn)(void); #define CHUNKS 1024 #define REPEAT 64 int main (void) { void *h1; void *h2; fn **foopp; fn bar, baz; int i, j; int n; void *allocs[REPEAT][CHUNKS]; mtrace (); /* Open the two objects. */ h1 = dlopen ("reldep6mod3.so", RTLD_LAZY); if (h1 == NULL) { printf ("cannot open reldep6mod3.so: %s\n", dlerror ()); exit (1); } foopp = dlsym (h1, "foopp"); if (foopp == NULL) { printf ("cannot get address of \"foopp\": %s\n", dlerror ()); exit (1); } n = (**foopp) (); if (n != 20) { printf ("(**foopp)() return %d, not return 20\n", n); exit (1); } h2 = dlopen ("reldep6mod4.so", RTLD_LAZY); if (h2 == NULL) { printf ("cannot open reldep6mod4.so: %s\n", dlerror ()); exit (1); } baz = dlsym (h2, "baz"); if (baz == NULL) { printf ("cannot get address of \"baz\": %s\n", dlerror ()); exit (1); } if (baz () != 31) { printf ("baz() did not return 31\n"); exit (1); } if (dlclose (h1) != 0) { printf ("closing h1 failed: %s\n", dlerror ()); exit (1); } /* Clobber memory. */ for (i = 0; i < REPEAT; ++i) for (j = 0; j < CHUNKS; ++j) allocs[i][j] = calloc (1, j + 1); bar = dlsym (h2, "bar"); if (bar == NULL) { printf ("cannot get address of \"bar\": %s\n", dlerror ()); exit (1); } if (bar () != 40) { printf ("bar() did not return 40\n"); exit (1); } baz = dlsym (h2, "baz"); if (baz == NULL) { printf ("cannot get address of \"baz\": %s\n", dlerror ()); exit (1); } if (baz () != 31) { printf ("baz() did not return 31\n"); exit (1); } for (i = 0; i < REPEAT; ++i) for (j = 0; j < CHUNKS; ++j) free (allocs[i][j]); if (dlclose (h2) != 0) { printf ("closing h2 failed: %s\n", dlerror ()); exit (1); } return 0; }