[XRay][compiler-rt] Runtime changes to support custom event logging
Summary:
This change implements support for the custom event logging sleds and
intrinsics at runtime. For now it only supports handling the sleds in
x86_64, with the implementations for other architectures stubbed out to
do nothing.
NOTE: Work in progress, uploaded for exposition/exploration purposes.
Depends on D27503, D30018, and D33032.
Reviewers: echristo, javed.absar, timshen
Subscribers: mehdi_amini, nemanjai, llvm-commits
Differential Revision: https://reviews.llvm.org/D30630
llvm-svn: 302857
diff --git a/compiler-rt/lib/xray/xray_arm.cc b/compiler-rt/lib/xray/xray_arm.cc
index 26d673e..94e1c26 100644
--- a/compiler-rt/lib/xray/xray_arm.cc
+++ b/compiler-rt/lib/xray/xray_arm.cc
@@ -18,7 +18,7 @@
#include <atomic>
#include <cassert>
-extern "C" void __clear_cache(void* start, void* end);
+extern "C" void __clear_cache(void *start, void *end);
namespace __xray {
@@ -122,8 +122,8 @@
reinterpret_cast<std::atomic<uint32_t> *>(FirstAddress),
uint32_t(PatchOpcodes::PO_B20), std::memory_order_release);
}
- __clear_cache(reinterpret_cast<char*>(FirstAddress),
- reinterpret_cast<char*>(CurAddress));
+ __clear_cache(reinterpret_cast<char *>(FirstAddress),
+ reinterpret_cast<char *>(CurAddress));
return true;
}
@@ -143,6 +143,12 @@
return patchSled(Enable, FuncId, Sled, __xray_FunctionTailExit);
}
+bool patchCustomEvent(const bool Enable, const uint32_t FuncId,
+ const XRaySled &Sled)
+ XRAY_NEVER_INSTRUMENT { // FIXME: Implement in arm?
+ return false;
+}
+
// FIXME: Maybe implement this better?
bool probeRequiredCPUFeatures() XRAY_NEVER_INSTRUMENT { return true; }