1// Use the clang feature for custom xray event logging.
2//
3// RUN: %clangxx_xray -std=c++11 %s -o %t
4// RUN: XRAY_OPTIONS="patch_premain=false verbosity=1 xray_logfile_base=custom-event-logging.xray-" %run %t 2>&1 | FileCheck %s
5// RUN: %clangxx_xray -std=c++11 -fpic -fpie %s -o %t
6// RUN: XRAY_OPTIONS="patch_premain=false verbosity=1 xray_logfile_base=custom-event-logging.xray-" %run %t 2>&1 | FileCheck %s
7// FIXME: Support this in non-x86_64 as well
8// REQUIRES: target={{(aarch64|x86_64)-.*linux.*}}
9// REQUIRES: built-in-llvm-tree
10#include <cstdio>
11#include "xray/xray_interface.h"
12
13[[clang::xray_always_instrument]] void foo() {
14 static constexpr char CustomLogged[] = "hello custom logging!";
15 printf(format: "before calling the custom logging...\n");
16 __xray_customevent(CustomLogged, sizeof(CustomLogged));
17 printf(format: "after calling the custom logging...\n");
18}
19
20void myprinter(void* ptr, size_t size) {
21 printf(format: "%.*s\n", static_cast<int>(size), static_cast<const char*>(ptr));
22}
23
24int main() {
25 foo();
26 // CHECK: before calling the custom logging...
27 // CHECK-NEXT: after calling the custom logging...
28 printf(format: "setting up custom event handler...\n");
29 // CHECK-NEXT: setting up custom event handler...
30 __xray_set_customevent_handler(entry: myprinter);
31 __xray_patch();
32 // CHECK-NEXT: before calling the custom logging...
33 foo();
34 // CHECK-NEXT: hello custom logging!
35 // CHECK-NEXT: after calling the custom logging...
36 printf(format: "removing custom event handler...\n");
37 // CHECK-NEXT: removing custom event handler...
38 __xray_remove_customevent_handler();
39 foo();
40 // CHECK-NEXT: before calling the custom logging...
41 // CHECK-NEXT: after calling the custom logging...
42}
43

source code of compiler-rt/test/xray/TestCases/Posix/custom-event-logging.cpp