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Fix LLDB build on old Linux kernels (pre-4.1) 

These fields are guarded elsewhere, but were missing here.

Reviewed By: wallace

Differential Revision: https://reviews.llvm.org/D133778
This commit is contained in:
David Spickett 2022-10-05 07:31:03 +00:00
parent 5fc28ebbaf
commit a9ffb47345
1 changed files with 27 additions and 0 deletions
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27
lldb/source/Plugins/Process/Linux/Perf.cpp
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@ -125,6 +125,10 @@ llvm::Error PerfEvent::MmapMetadataAndDataBuffer(size_t num_data_pages,
}
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();
@ -141,6 +145,7 @@ llvm::Error PerfEvent::MmapAuxBuffer(size_t num_aux_pages) {
return Error::success();
} else
return mmap_aux.takeError();
#endif
}
llvm::Error PerfEvent::MmapMetadataAndBuffers(size_t num_data_pages,
@ -170,16 +175,24 @@ perf_event_mmap_page &PerfEvent::GetMetadataPage() const {
}
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() {
@ -188,6 +201,10 @@ 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);
@ -224,6 +241,7 @@ Expected<std::vector<uint8_t>> PerfEvent::GetReadOnlyDataBuffer() {
}
return output;
#endif
}
Expected<std::vector<uint8_t>> PerfEvent::GetReadOnlyAuxBuffer() {
@ -232,6 +250,10 @@ 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);
@ -264,6 +286,7 @@ Expected<std::vector<uint8_t>> PerfEvent::GetReadOnlyAuxBuffer() {
}
return output;
#endif
}
Error PerfEvent::DisableWithIoctl() {
@ -295,11 +318,15 @@ Error PerfEvent::EnableWithIoctl() {
}
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>