diff options
Diffstat (limited to 'REORG.TODO/elf/reldep3.c')
-rw-r--r-- | REORG.TODO/elf/reldep3.c | 101 |
1 files changed, 101 insertions, 0 deletions
diff --git a/REORG.TODO/elf/reldep3.c b/REORG.TODO/elf/reldep3.c new file mode 100644 index 0000000000..05013d3509 --- /dev/null +++ b/REORG.TODO/elf/reldep3.c @@ -0,0 +1,101 @@ +#include <dlfcn.h> +#include <mcheck.h> +#include <stdio.h> +#include <stdlib.h> + +int +main (void) +{ + void *h1; + void *h2; + int (*fp) (void); + int *vp; + + mtrace (); + + /* Open the two objects. */ + h1 = dlopen ("reldepmod1.so", RTLD_LAZY | RTLD_GLOBAL); + if (h1 == NULL) + { + printf ("cannot open reldepmod1.so: %s\n", dlerror ()); + exit (1); + } + h2 = dlopen ("reldepmod4.so", RTLD_LAZY); + if (h2 == NULL) + { + printf ("cannot open reldepmod4.so: %s\n", dlerror ()); + exit (1); + } + + /* Get the address of the variable in reldepmod1.so. */ + vp = dlsym (h1, "some_var"); + if (vp == NULL) + { + printf ("cannot get address of \"some_var\": %s\n", dlerror ()); + exit (1); + } + + *vp = 42; + + /* Get the function `call_me' in the second object. This has a + dependency which is resolved by a definition in reldepmod1.so. */ + fp = dlsym (h2, "call_me"); + if (fp == NULL) + { + printf ("cannot get address of \"call_me\": %s\n", dlerror ()); + exit (1); + } + + /* Call the function. */ + if (fp () != 0) + { + puts ("function \"call_me\" returned wrong result"); + exit (1); + } + + /* Now close the first object. If must still be around since we have + an implicit dependency. */ + if (dlclose (h1) != 0) + { + printf ("closing h1 failed: %s\n", dlerror ()); + exit (1); + } + + /* Open the first object again. */ + h1 = dlopen ("reldepmod1.so", RTLD_LAZY | RTLD_GLOBAL); + if (h1 == NULL) + { + printf ("cannot open reldepmod1.so the second time: %s\n", dlerror ()); + exit (1); + } + + /* Get the variable address again. */ + vp = dlsym (h1, "some_var"); + if (vp == NULL) + { + printf ("cannot get address of \"some_var\" the second time: %s\n", + dlerror ()); + exit (1); + } + + /* The variable now must have its originial value. */ + if (*vp != 0) + { + puts ("variable \"some_var\" not reset"); + exit (1); + } + + /* Close the first object again, we are done. */ + if (dlclose (h1) != 0) + { + printf ("closing h1 failed: %s\n", dlerror ()); + exit (1); + } + if (dlclose (h2) != 0) + { + printf ("closing h2 failed: %s\n", dlerror ()); + exit (1); + } + + return 0; +} |