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/* RUN: %clang_msan -g %s -o %t
RUN: %clang_msan -g %s -DBUILD_SO -fPIC -o %t-so.so -shared
RUN: %run %t 2>&1 | FileCheck %s
REQUIRES: glibc{{.*}}
*/
#define _GNU_SOURCE
#ifndef BUILD_SO
#include <assert.h>
#include <dlfcn.h>
#include <elf.h>
#include <link.h>
#include <stdio.h>
#include <stdlib.h>
typedef volatile long *(* get_t)();
get_t GetTls;
int main(int argc, char *argv[]) {
char path[4096];
snprintf(path, sizeof(path), "%s-so.so", argv[0]);
int i;
void *handle = dlopen(path, RTLD_LAZY);
if (!handle) fprintf(stderr, "%s\n", dlerror());
assert(handle != 0);
GetTls = (get_t)dlsym(handle, "GetTls");
assert(dlerror() == 0);
{
printf("Testing RTLD_DL_LINKMAP\n");
fflush(stdout);
Dl_info info;
struct link_map *map_ptr;
int ret = dladdr1(GetTls, &info, (void**)(&map_ptr), RTLD_DL_LINKMAP);
assert(ret != 0);
printf("fname: %s\n", info.dli_fname);
printf("fbase: %p\n", info.dli_fbase);
printf("sname: %s\n", info.dli_sname);
// CHECK: sname: GetTls
printf("saddr: %p\n", info.dli_saddr);
assert(map_ptr != NULL);
printf("map_ptr: %p\n", map_ptr);
fflush(stdout);
// Find the start of the link map
while(map_ptr->l_prev != NULL) {
fflush(stdout);
map_ptr = map_ptr->l_prev;
}
fflush(stdout);
while(map_ptr != NULL) {
assert(map_ptr->l_name != NULL);
printf("0x%lx: '%s', %p\n", map_ptr->l_addr, map_ptr->l_name, map_ptr->l_ld);
fflush(stdout);
map_ptr = map_ptr->l_next;
}
// CHECK: libc.so
// CHECK: dladdr1_test
}
// Test RTLD_DL_SYMENT
{
printf("Testing RTLD_DL_SYMENT\n");
fflush(stdout);
Dl_info info;
ElfW(Sym) *sym;
int ret = dladdr1(GetTls, &info, (void**)(&sym), RTLD_DL_SYMENT);
assert(ret != 0);
printf("fname: %s\n", info.dli_fname);
printf("fbase: %p\n", info.dli_fbase);
printf("sname: %s\n", info.dli_sname);
// CHECK: sname: GetTls
printf("saddr: %p\n", info.dli_saddr);
printf("sym: %d %d %d %d %lu %lu\n",
sym->st_name, sym->st_info, sym->st_other,
sym->st_shndx, sym->st_value, sym->st_size);
// CHECK: sym:
}
return 0;
}
#else // BUILD_SO
long var;
long *GetTls() {
return &var;
}
#endif
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