Import compiler-rt 10.0.1 release.

ok kettenis@

1 files changed, 86 insertions, 0 deletions

diff --git a/gnu/llvm/compiler-rt/lib/fuzzer/dataflow/DataFlowCallbacks.cpp b/gnu/llvm/compiler-rt/lib/fuzzer/dataflow/DataFlowCallbacks.cpp
new file mode 100644
index 00000000000..170b4d891d7
--- /dev/null
+++ b/gnu/llvm/compiler-rt/lib/fuzzer/dataflow/DataFlowCallbacks.cpp
@@ -0,0 +1,86 @@
+/*===- DataFlowCallbacks.cpp - a standalone DataFlow trace          -------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+// Instrumentation callbacks for DataFlow.cpp.
+// These functions should not be instrumented by DFSan, so we
+// keep them in a separate file and compile it w/o DFSan.
+//===----------------------------------------------------------------------===*/
+#include "DataFlow.h"
+
+#include <cassert>
+#include <cstdio>
+#include <cstdlib>
+
+static __thread size_t CurrentFunc;
+static uint32_t *GuardsBeg, *GuardsEnd;
+static inline bool BlockIsEntry(size_t BlockIdx) {
+  return __dft.PCsBeg[BlockIdx * 2 + 1] & PCFLAG_FUNC_ENTRY;
+}
+
+extern "C" {
+
+void __sanitizer_cov_trace_pc_guard_init(uint32_t *start,
+                                         uint32_t *stop) {
+  assert(__dft.NumFuncs == 0 && "This tool does not support DSOs");
+  assert(start < stop && "The code is not instrumented for coverage");
+  if (start == stop || *start) return;  // Initialize only once.
+  GuardsBeg = start;
+  GuardsEnd = stop;
+}
+
+void __sanitizer_cov_pcs_init(const uintptr_t *pcs_beg,
+                              const uintptr_t *pcs_end) {
+  if (__dft.NumGuards) return;  // Initialize only once.
+  __dft.NumGuards = GuardsEnd - GuardsBeg;
+  __dft.PCsBeg = pcs_beg;
+  __dft.PCsEnd = pcs_end;
+  assert(__dft.NumGuards == (__dft.PCsEnd - __dft.PCsBeg) / 2);
+  for (size_t i = 0; i < __dft.NumGuards; i++) {
+    if (BlockIsEntry(i)) {
+      __dft.NumFuncs++;
+      GuardsBeg[i] = __dft.NumFuncs;
+    }
+  }
+  __dft.BBExecuted = (bool*)calloc(__dft.NumGuards, sizeof(bool));
+  fprintf(stderr, "INFO: %zd instrumented function(s) observed "
+          "and %zd basic blocks\n", __dft.NumFuncs, __dft.NumGuards);
+}
+
+void __sanitizer_cov_trace_pc_indir(uint64_t x){}  // unused.
+
+void __sanitizer_cov_trace_pc_guard(uint32_t *guard) {
+  size_t GuardIdx = guard - GuardsBeg;
+  // assert(GuardIdx < __dft.NumGuards);
+  __dft.BBExecuted[GuardIdx] = true;
+  if (!*guard) return;  // not a function entry.
+  uint32_t FuncNum = *guard - 1;  // Guards start from 1.
+  // assert(FuncNum < __dft.NumFuncs);
+  CurrentFunc = FuncNum;
+}
+
+void __dfsw___sanitizer_cov_trace_switch(uint64_t Val, uint64_t *Cases,
+                                         dfsan_label L1, dfsan_label UnusedL) {
+  assert(CurrentFunc < __dft.NumFuncs);
+  __dft.FuncLabels[CurrentFunc] |= L1;
+}
+
+#define HOOK(Name, Type)                                                       \
+  void Name(Type Arg1, Type Arg2, dfsan_label L1, dfsan_label L2) {            \
+    __dft.FuncLabels[CurrentFunc] |= L1 | L2;                                  \
+  }
+    //assert(CurrentFunc < __dft.NumFuncs);
+
+HOOK(__dfsw___sanitizer_cov_trace_const_cmp1, uint8_t)
+HOOK(__dfsw___sanitizer_cov_trace_const_cmp2, uint16_t)
+HOOK(__dfsw___sanitizer_cov_trace_const_cmp4, uint32_t)
+HOOK(__dfsw___sanitizer_cov_trace_const_cmp8, uint64_t)
+HOOK(__dfsw___sanitizer_cov_trace_cmp1, uint8_t)
+HOOK(__dfsw___sanitizer_cov_trace_cmp2, uint16_t)
+HOOK(__dfsw___sanitizer_cov_trace_cmp4, uint32_t)
+HOOK(__dfsw___sanitizer_cov_trace_cmp8, uint64_t)
+
+} // extern "C"