1 // Check that we can turn a function id to a function address, and also get the
2 // maximum function id for the current binary.
3 //
4 // RUN: %clangxx_xray -std=c++11 %s -o %t
5 // RUN: XRAY_OPTIONS="patch_premain=false" %run %t
6 // RUN: %clangxx_xray -fno-xray-function-index -std=c++11 %s -o %t
7 // RUN: XRAY_OPTIONS="patch_premain=false" %run %t
8 
9 // UNSUPPORTED: target-is-mips64,target-is-mips64el
10 
11 #include "xray/xray_interface.h"
12 #include <algorithm>
13 #include <cassert>
14 #include <cstdio>
15 #include <iterator>
16 #include <set>
17 
18 [[clang::xray_always_instrument]] void bar(){}
19 
20 [[clang::xray_always_instrument]] void foo() {
21   bar();
22 }
23 
24 [[clang::xray_always_instrument]] int main(int argc, char *argv[]) {
25   assert(__xray_max_function_id() != 0 && "we need xray instrumentation!");
26   std::set<void *> must_be_instrumented = {reinterpret_cast<void *>(&foo),
27                                            reinterpret_cast<void *>(&bar),
28                                            reinterpret_cast<void *>(&main)};
29   std::set<void *> all_instrumented;
30   for (auto i = __xray_max_function_id(); i != 0; --i) {
31     auto addr = __xray_function_address(i);
32     all_instrumented.insert(reinterpret_cast<void *>(addr));
33   }
34   assert(all_instrumented.size() == __xray_max_function_id() &&
35          "each function id must be assigned to a unique function");
36 
37   std::set<void *> not_instrumented;
38   std::set_difference(
39       must_be_instrumented.begin(), must_be_instrumented.end(),
40       all_instrumented.begin(), all_instrumented.end(),
41       std::inserter(not_instrumented, not_instrumented.begin()));
42   assert(
43       not_instrumented.empty() &&
44       "we should see all explicitly instrumented functions with function ids");
45   return not_instrumented.empty() ? 0 : 1;
46 }
47