1// Check that we can get a profile from a single-threaded application, on
2// demand through the XRay logging implementation API.
3//
4// FIXME: Make -fxray-modes=xray-profiling part of the default?
5// RUN: %clangxx_xray -std=c++11 %s -o %t -fxray-modes=xray-profiling
6// RUN: rm -f xray-log.profiling-single-*
7// RUN: XRAY_OPTIONS=verbosity=1 \
8// RUN: XRAY_PROFILING_OPTIONS=no_flush=true %run %t
9// RUN: XRAY_OPTIONS=verbosity=1 %run %t
10// RUN: PROFILES=`ls xray-log.profiling-single-* | wc -l`
11// RUN: [ $PROFILES -eq 2 ]
12// RUN: rm -f xray-log.profiling-single-*
13//
14// REQUIRES: built-in-llvm-tree
15
16#include "xray/xray_interface.h"
17#include "xray/xray_log_interface.h"
18#include <cassert>
19#include <cstdio>
20#include <string>
21
22[[clang::xray_always_instrument]] void f2() { return; }
23[[clang::xray_always_instrument]] void f1() { f2(); }
24[[clang::xray_always_instrument]] void f0() { f1(); }
25
26using namespace std;
27
28volatile int buffer_counter = 0;
29
30[[clang::xray_never_instrument]] void process_buffer(const char *, XRayBuffer) {
31 // FIXME: Actually assert the contents of the buffer.
32 ++buffer_counter;
33}
34
35[[clang::xray_always_instrument]] int main(int, char **) {
36 assert(__xray_log_select_mode("xray-profiling") ==
37 XRayLogRegisterStatus::XRAY_REGISTRATION_OK);
38 assert(__xray_log_get_current_mode() != nullptr);
39 std::string current_mode = __xray_log_get_current_mode();
40 assert(current_mode == "xray-profiling");
41 assert(__xray_patch() == XRayPatchingStatus::SUCCESS);
42 assert(__xray_log_init_mode("xray-profiling", "") ==
43 XRayLogInitStatus::XRAY_LOG_INITIALIZED);
44 f0();
45 assert(__xray_log_finalize() == XRayLogInitStatus::XRAY_LOG_FINALIZED);
46 f0();
47 assert(__xray_log_process_buffers(process_buffer) ==
48 XRayLogFlushStatus::XRAY_LOG_FLUSHED);
49 // There's always at least one buffer, containing the profile file header. We
50 // assert that we have two, to indicate that we're expecting exactly one
51 // thread's worth of data.
52 assert(buffer_counter == 2);
53 assert(__xray_log_flushLog() == XRayLogFlushStatus::XRAY_LOG_FLUSHED);
54
55 // Let's reset the counter.
56 buffer_counter = 0;
57
58 assert(__xray_log_init_mode("xray-profiling", "") ==
59 XRayLogInitStatus::XRAY_LOG_INITIALIZED);
60 f0();
61 assert(__xray_log_finalize() == XRayLogInitStatus::XRAY_LOG_FINALIZED);
62 f0();
63 assert(__xray_log_process_buffers(process_buffer) ==
64 XRayLogFlushStatus::XRAY_LOG_FLUSHED);
65 assert(buffer_counter == 2);
66 assert(__xray_log_flushLog() == XRayLogFlushStatus::XRAY_LOG_FLUSHED);
67}
68

source code of compiler-rt/test/xray/TestCases/Posix/profiling-single-threaded.cpp