}
llvm::Error PerfEvent::MmapAuxBuffer(size_t num_aux_pages) {
+#ifndef PERF_ATTR_SIZE_VER5
+ return createStringError(inconvertibleErrorCode(),
+ "Intel PT Linux perf event not supported");
+#else
if (num_aux_pages == 0)
return Error::success();
return Error::success();
} else
return mmap_aux.takeError();
+#endif
}
llvm::Error PerfEvent::MmapMetadataAndBuffers(size_t num_data_pages,
}
ArrayRef<uint8_t> PerfEvent::GetDataBuffer() const {
+#ifndef PERF_ATTR_SIZE_VER5
+ llvm_unreachable("Intel PT Linux perf event not supported");
+#else
perf_event_mmap_page &mmap_metadata = GetMetadataPage();
return {reinterpret_cast<uint8_t *>(m_metadata_data_base.get()) +
mmap_metadata.data_offset,
static_cast<size_t>(mmap_metadata.data_size)};
+#endif
}
ArrayRef<uint8_t> PerfEvent::GetAuxBuffer() const {
+#ifndef PERF_ATTR_SIZE_VER5
+ llvm_unreachable("Intel PT Linux perf event not supported");
+#else
perf_event_mmap_page &mmap_metadata = GetMetadataPage();
return {reinterpret_cast<uint8_t *>(m_aux_base.get()),
static_cast<size_t>(mmap_metadata.aux_size)};
+#endif
}
Expected<std::vector<uint8_t>> PerfEvent::GetReadOnlyDataBuffer() {
// this piece of code updates some pointers. See more about data_tail
// in https://man7.org/linux/man-pages/man2/perf_event_open.2.html.
+#ifndef PERF_ATTR_SIZE_VER5
+ return createStringError(inconvertibleErrorCode(),
+ "Intel PT Linux perf event not supported");
+#else
bool was_enabled = m_enabled;
if (Error err = DisableWithIoctl())
return std::move(err);
}
return output;
+#endif
}
Expected<std::vector<uint8_t>> PerfEvent::GetReadOnlyAuxBuffer() {
// this piece of code updates some pointers. See more about aux_tail
// in https://man7.org/linux/man-pages/man2/perf_event_open.2.html.
+#ifndef PERF_ATTR_SIZE_VER5
+ return createStringError(inconvertibleErrorCode(),
+ "Intel PT Linux perf event not supported");
+#else
bool was_enabled = m_enabled;
if (Error err = DisableWithIoctl())
return std::move(err);
}
return output;
+#endif
}
Error PerfEvent::DisableWithIoctl() {
}
size_t PerfEvent::GetEffectiveDataBufferSize() const {
+#ifndef PERF_ATTR_SIZE_VER5
+ llvm_unreachable("Intel PT Linux perf event not supported");
+#else
perf_event_mmap_page &mmap_metadata = GetMetadataPage();
if (mmap_metadata.data_head < mmap_metadata.data_size)
return mmap_metadata.data_head;
else
return mmap_metadata.data_size; // The buffer has wrapped.
+#endif
}
Expected<PerfEvent>