cl::desc("instrument atomic instructions (rmw, cmpxchg)"), cl::Hidden,
cl::init(true));
+static cl::opt<bool>
+ ClInstrumentByval("asan-instrument-byval",
+ cl::desc("instrument byval call arguments"), cl::Hidden,
+ cl::init(true));
+
static cl::opt<bool> ClAlwaysSlowPath(
"asan-always-slow-path",
cl::desc("use instrumentation with slow path for all accesses"), cl::Hidden,
Alignment = (unsigned)AlignmentConstant->getZExtValue();
Value *Mask = CI->getOperand(2 + OpOffset);
Interesting.emplace_back(I, OpOffset, IsWrite, Ty, Alignment, Mask);
+ } else {
+ for (unsigned ArgNo = 0; ArgNo < CI->getNumArgOperands(); ArgNo++) {
+ if (!ClInstrumentByval || !CI->isByValArgument(ArgNo) ||
+ ignoreAccess(CI->getArgOperand(ArgNo)))
+ continue;
+ Type *Ty = CI->getParamByValType(ArgNo);
+ Interesting.emplace_back(I, ArgNo, false, Ty, 1);
+ }
}
}
}
cl::desc("instrument atomic instructions (rmw, cmpxchg)"), cl::Hidden,
cl::init(true));
+static cl::opt<bool> ClInstrumentByval("hwasan-instrument-byval",
+ cl::desc("instrument byval arguments"),
+ cl::Hidden, cl::init(true));
+
static cl::opt<bool> ClRecover(
"hwasan-recover",
cl::desc("Enable recovery mode (continue-after-error)."),
return;
Interesting.emplace_back(I, XCHG->getPointerOperandIndex(), true,
XCHG->getCompareOperand()->getType(), 0);
+ } else if (auto CI = dyn_cast<CallInst>(I)) {
+ for (unsigned ArgNo = 0; ArgNo < CI->getNumArgOperands(); ArgNo++) {
+ if (!ClInstrumentByval || !CI->isByValArgument(ArgNo) ||
+ ignoreAccess(CI->getArgOperand(ArgNo)))
+ continue;
+ Type *Ty = CI->getParamByValType(ArgNo);
+ Interesting.emplace_back(I, ArgNo, false, Ty, 1);
+ }
}
}
--- /dev/null
+; RUN: opt < %s -asan -S | FileCheck %s
+; Test that for call instructions, the by-value arguments are instrumented.
+
+target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
+target triple = "x86_64-unknown-linux-gnu"
+
+%struct.bar = type { %struct.foo }
+%struct.foo = type { i8*, i8*, i8* }
+define dso_local void @func2(%struct.foo* %foo) sanitize_address {
+; CHECK-LABEL: @func2
+ tail call void @func1(%struct.foo* byval(%struct.foo) align 8 %foo) #2
+; CHECK: call void @__asan_report_load
+ ret void
+; CHECK: ret void
+}
+declare dso_local void @func1(%struct.foo* byval(%struct.foo) align 8)
+
+!0 = !{i32 1, !"wchar_size", i32 4}