| // Check that we can patch and unpatch specific function ids. |
| // |
| // RUN: %clangxx_xray -std=c++11 %s -o %t |
| // RUN: XRAY_OPTIONS="patch_premain=false xray_naive_log=false" %run %t | FileCheck %s |
| |
| // UNSUPPORTED: target-is-mips64,target-is-mips64el |
| |
| #include "xray/xray_interface.h" |
| |
| #include <set> |
| #include <cstdio> |
| #include <cassert> |
| |
| std::set<int32_t> function_ids; |
| |
| [[clang::xray_never_instrument]] void coverage_handler(int32_t fid, |
| XRayEntryType) { |
| thread_local bool patching = false; |
| if (patching) return; |
| patching = true; |
| function_ids.insert(fid); |
| __xray_unpatch_function(fid); |
| patching = false; |
| } |
| |
| [[clang::xray_always_instrument]] void baz() { |
| // do nothing! |
| } |
| |
| [[clang::xray_always_instrument]] void bar() { |
| baz(); |
| } |
| |
| [[clang::xray_always_instrument]] void foo() { |
| bar(); |
| } |
| |
| [[clang::xray_always_instrument]] int main(int argc, char *argv[]) { |
| __xray_set_handler(coverage_handler); |
| assert(__xray_patch() == XRayPatchingStatus::SUCCESS); |
| foo(); |
| assert(__xray_unpatch() == XRayPatchingStatus::SUCCESS); |
| |
| // print out the function_ids. |
| printf("first pass.\n"); |
| for (const auto id : function_ids) |
| printf("patched: %d\n", id); |
| |
| // CHECK-LABEL: first pass. |
| // CHECK-DAG: patched: [[F1:.*]] |
| // CHECK-DAG: patched: [[F2:.*]] |
| // CHECK-DAG: patched: [[F3:.*]] |
| |
| // make a copy of the function_ids, then patch them later. |
| auto called_fns = function_ids; |
| |
| // clear the function_ids. |
| function_ids.clear(); |
| |
| // patch the functions we've called before. |
| for (const auto id : called_fns) |
| assert(__xray_patch_function(id) == XRayPatchingStatus::SUCCESS); |
| |
| // then call them again. |
| foo(); |
| assert(__xray_unpatch() == XRayPatchingStatus::SUCCESS); |
| |
| // confirm that we've seen the same functions again. |
| printf("second pass.\n"); |
| for (const auto id : function_ids) |
| printf("patched: %d\n", id); |
| // CHECK-LABEL: second pass. |
| // CHECK-DAG: patched: [[F1]] |
| // CHECK-DAG: patched: [[F2]] |
| // CHECK-DAG: patched: [[F3]] |
| |
| // Now we want to make sure that if we unpatch one, that we're only going to |
| // see two calls of the coverage_handler. |
| function_ids.clear(); |
| assert(__xray_patch() == XRayPatchingStatus::SUCCESS); |
| assert(__xray_unpatch_function(1) == XRayPatchingStatus::SUCCESS); |
| foo(); |
| assert(__xray_unpatch() == XRayPatchingStatus::SUCCESS); |
| |
| // confirm that we don't see function id one called anymore. |
| printf("missing 1.\n"); |
| for (const auto id : function_ids) |
| printf("patched: %d\n", id); |
| // CHECK-LABEL: missing 1. |
| // CHECK-NOT: patched: 1 |
| } |