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74 lines
2.3 KiB
74 lines
2.3 KiB
4 months ago
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// RUN: %clangxx_xray -g -std=c++11 %s -o %t
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// RUN: rm xray-log.fdr-reinit* || true
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// RUN: XRAY_OPTIONS="verbosity=1" %run %t
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// RUN: rm xray-log.fdr-reinit* || true
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#include "xray/xray_log_interface.h"
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#include <atomic>
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#include <cassert>
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#include <cstddef>
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#include <thread>
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volatile uint64_t var = 0;
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std::atomic_flag keep_going = ATOMIC_FLAG_INIT;
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[[clang::xray_always_instrument]] void __attribute__((noinline)) func() {
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++var;
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}
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int main(int argc, char *argv[]) {
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// Start a thread that will just keep calling the function, to spam calls to
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// the function call handler.
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keep_going.test_and_set(std::memory_order_acquire);
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std::thread t([] {
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while (keep_going.test_and_set(std::memory_order_acquire))
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func();
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});
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static constexpr char kConfig[] =
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"buffer_size=1024:buffer_max=10:no_file_flush=true";
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// Then we initialize the FDR mode implementation.
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assert(__xray_log_select_mode("xray-fdr") ==
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XRayLogRegisterStatus::XRAY_REGISTRATION_OK);
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auto init_status = __xray_log_init_mode("xray-fdr", kConfig);
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assert(init_status == XRayLogInitStatus::XRAY_LOG_INITIALIZED);
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// Now we patch the instrumentation points.
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__xray_patch();
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// Spin for a bit, calling func() enough times.
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for (auto i = 0; i < 1 << 20; ++i)
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func();
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// Then immediately finalize the implementation.
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auto finalize_status = __xray_log_finalize();
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assert(finalize_status == XRayLogInitStatus::XRAY_LOG_FINALIZED);
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// Once we're here, we should then flush.
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auto flush_status = __xray_log_flushLog();
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assert(flush_status == XRayLogFlushStatus::XRAY_LOG_FLUSHED);
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// Without doing anything else, we should re-initialize.
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init_status = __xray_log_init_mode("xray-fdr", kConfig);
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assert(init_status == XRayLogInitStatus::XRAY_LOG_INITIALIZED);
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// Then we spin for a bit again calling func() enough times.
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for (auto i = 0; i < 1 << 20; ++i)
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func();
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// Then immediately finalize the implementation.
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finalize_status = __xray_log_finalize();
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assert(finalize_status == XRayLogInitStatus::XRAY_LOG_FINALIZED);
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// Once we're here, we should then flush.
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flush_status = __xray_log_flushLog();
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assert(flush_status == XRayLogFlushStatus::XRAY_LOG_FLUSHED);
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// Finally, we should signal the sibling thread to stop.
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keep_going.clear(std::memory_order_release);
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// Then join.
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t.join();
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}
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