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// Use the clang feature for custom xray event logging.
//
// RUN: %clangxx_xray -std=c++11 %s -o %t
// RUN: XRAY_OPTIONS="patch_premain=false verbosity=1 xray_naive_log=false xray_logfile_base=custom-event-logging.xray-" %run %t 2>&1 | FileCheck %s
// RUN: %clangxx_xray -std=c++11 -fpic -fpie %s -o %t
// RUN: XRAY_OPTIONS="patch_premain=false verbosity=1 xray_naive_log=false xray_logfile_base=custom-event-logging.xray-" %run %t 2>&1 | FileCheck %s
// FIXME: Support this in non-x86_64 as well
// REQUIRES: x86_64-linux
// REQUIRES: built-in-llvm-tree
#include <cstdio>
#include "xray/xray_interface.h"
[[clang::xray_always_instrument]] void foo() {
static constexpr char CustomLogged[] = "hello custom logging!";
printf("before calling the custom logging...\n");
__xray_customevent(CustomLogged, sizeof(CustomLogged));
printf("after calling the custom logging...\n");
}
void myprinter(void* ptr, size_t size) {
printf("%.*s\n", static_cast<int>(size), static_cast<const char*>(ptr));
}
int main() {
foo();
// CHECK: before calling the custom logging...
// CHECK-NEXT: after calling the custom logging...
printf("setting up custom event handler...\n");
// CHECK-NEXT: setting up custom event handler...
__xray_set_customevent_handler(myprinter);
__xray_patch();
// CHECK-NEXT: before calling the custom logging...
foo();
// CHECK-NEXT: hello custom logging!
// CHECK-NEXT: after calling the custom logging...
printf("removing custom event handler...\n");
// CHECK-NEXT: removing custom event handler...
__xray_remove_customevent_handler();
foo();
// CHECK-NEXT: before calling the custom logging...
// CHECK-NEXT: after calling the custom logging...
}
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