r329762 - Introduce a new builtin, __builtin_dump_struct, that is useful for dumping structure contents at runtime in circumstances where debuggers may not be easily available (such as in kernel work).
Aaron Ballman via cfe-commits
cfe-commits at lists.llvm.org
Tue Apr 10 14:58:13 PDT 2018
Author: aaronballman
Date: Tue Apr 10 14:58:13 2018
New Revision: 329762
URL: http://llvm.org/viewvc/llvm-project?rev=329762&view=rev
Log:
Introduce a new builtin, __builtin_dump_struct, that is useful for dumping structure contents at runtime in circumstances where debuggers may not be easily available (such as in kernel work).
Patch by Paul Semel.
Added:
cfe/trunk/test/CodeGen/dump-struct-builtin.c
cfe/trunk/test/Sema/builtin-dump-struct.c
Modified:
cfe/trunk/include/clang/Basic/Builtins.def
cfe/trunk/lib/CodeGen/CGBuiltin.cpp
cfe/trunk/lib/Sema/SemaChecking.cpp
Modified: cfe/trunk/include/clang/Basic/Builtins.def
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/Basic/Builtins.def?rev=329762&r1=329761&r2=329762&view=diff
==============================================================================
--- cfe/trunk/include/clang/Basic/Builtins.def (original)
+++ cfe/trunk/include/clang/Basic/Builtins.def Tue Apr 10 14:58:13 2018
@@ -1374,6 +1374,7 @@ BUILTIN(__builtin_addressof, "v*v&", "nc
BUILTIN(__builtin_operator_new, "v*z", "tc")
BUILTIN(__builtin_operator_delete, "vv*", "tn")
BUILTIN(__builtin_char_memchr, "c*cC*iz", "n")
+BUILTIN(__builtin_dump_struct, "ivC*v*", "tn")
// Safestack builtins
BUILTIN(__builtin___get_unsafe_stack_start, "v*", "Fn")
Modified: cfe/trunk/lib/CodeGen/CGBuiltin.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGBuiltin.cpp?rev=329762&r1=329761&r2=329762&view=diff
==============================================================================
--- cfe/trunk/lib/CodeGen/CGBuiltin.cpp (original)
+++ cfe/trunk/lib/CodeGen/CGBuiltin.cpp Tue Apr 10 14:58:13 2018
@@ -14,6 +14,7 @@
#include "CGCXXABI.h"
#include "CGObjCRuntime.h"
#include "CGOpenCLRuntime.h"
+#include "CGRecordLayout.h"
#include "CodeGenFunction.h"
#include "CodeGenModule.h"
#include "ConstantEmitter.h"
@@ -930,6 +931,93 @@ EmitCheckedMixedSignMultiply(CodeGenFunc
return RValue::get(Overflow);
}
+static llvm::Value *dumpRecord(CodeGenFunction &CGF, QualType RType,
+ Value *&RecordPtr, CharUnits Align, Value *Func,
+ int Lvl) {
+ const auto *RT = RType->getAs<RecordType>();
+ ASTContext &Context = CGF.getContext();
+ RecordDecl *RD = RT->getDecl()->getDefinition();
+ ASTContext &Ctx = RD->getASTContext();
+ const ASTRecordLayout &RL = Ctx.getASTRecordLayout(RD);
+ std::string Pad = std::string(Lvl * 4, ' ');
+
+ Value *GString =
+ CGF.Builder.CreateGlobalStringPtr(RType.getAsString() + " {\n");
+ Value *Res = CGF.Builder.CreateCall(Func, {GString});
+
+ static llvm::DenseMap<QualType, const char *> Types;
+ if (Types.empty()) {
+ Types[Context.CharTy] = "%c";
+ Types[Context.BoolTy] = "%d";
+ Types[Context.IntTy] = "%d";
+ Types[Context.UnsignedIntTy] = "%u";
+ Types[Context.LongTy] = "%ld";
+ Types[Context.UnsignedLongTy] = "%lu";
+ Types[Context.LongLongTy] = "%lld";
+ Types[Context.UnsignedLongLongTy] = "%llu";
+ Types[Context.ShortTy] = "%hd";
+ Types[Context.UnsignedShortTy] = "%hu";
+ Types[Context.VoidPtrTy] = "%p";
+ Types[Context.FloatTy] = "%f";
+ Types[Context.DoubleTy] = "%f";
+ Types[Context.LongDoubleTy] = "%Lf";
+ Types[Context.getPointerType(Context.CharTy)] = "%s";
+ }
+
+ for (const auto *FD : RD->fields()) {
+ uint64_t Off = RL.getFieldOffset(FD->getFieldIndex());
+ Off = Ctx.toCharUnitsFromBits(Off).getQuantity();
+
+ Value *FieldPtr = RecordPtr;
+ if (RD->isUnion())
+ FieldPtr = CGF.Builder.CreatePointerCast(
+ FieldPtr, CGF.ConvertType(Context.getPointerType(FD->getType())));
+ else
+ FieldPtr = CGF.Builder.CreateStructGEP(CGF.ConvertType(RType), FieldPtr,
+ FD->getFieldIndex());
+
+ GString = CGF.Builder.CreateGlobalStringPtr(
+ llvm::Twine(Pad)
+ .concat(FD->getType().getAsString())
+ .concat(llvm::Twine(' '))
+ .concat(FD->getNameAsString())
+ .concat(" : ")
+ .str());
+ Value *TmpRes = CGF.Builder.CreateCall(Func, {GString});
+ Res = CGF.Builder.CreateAdd(Res, TmpRes);
+
+ QualType CanonicalType =
+ FD->getType().getUnqualifiedType().getCanonicalType();
+
+ // We check whether we are in a recursive type
+ if (CanonicalType->isRecordType()) {
+ Value *TmpRes =
+ dumpRecord(CGF, CanonicalType, FieldPtr, Align, Func, Lvl + 1);
+ Res = CGF.Builder.CreateAdd(TmpRes, Res);
+ continue;
+ }
+
+ // We try to determine the best format to print the current field
+ llvm::Twine Format = Types.find(CanonicalType) == Types.end()
+ ? Types[Context.VoidPtrTy]
+ : Types[CanonicalType];
+
+ Address FieldAddress = Address(FieldPtr, Align);
+ FieldPtr = CGF.Builder.CreateLoad(FieldAddress);
+
+ // FIXME Need to handle bitfield here
+ GString = CGF.Builder.CreateGlobalStringPtr(
+ Format.concat(llvm::Twine('\n')).str());
+ TmpRes = CGF.Builder.CreateCall(Func, {GString, FieldPtr});
+ Res = CGF.Builder.CreateAdd(Res, TmpRes);
+ }
+
+ GString = CGF.Builder.CreateGlobalStringPtr(Pad + "}\n");
+ Value *TmpRes = CGF.Builder.CreateCall(Func, {GString});
+ Res = CGF.Builder.CreateAdd(Res, TmpRes);
+ return Res;
+}
+
RValue CodeGenFunction::EmitBuiltinExpr(const FunctionDecl *FD,
unsigned BuiltinID, const CallExpr *E,
ReturnValueSlot ReturnValue) {
@@ -1196,6 +1284,18 @@ RValue CodeGenFunction::EmitBuiltinExpr(
return RValue::get(ComplexVal.first);
}
+ case Builtin::BI__builtin_dump_struct: {
+ Value *Func = EmitScalarExpr(E->getArg(1)->IgnoreImpCasts());
+ CharUnits Arg0Align = EmitPointerWithAlignment(E->getArg(0)).getAlignment();
+
+ const Expr *Arg0 = E->getArg(0)->IgnoreImpCasts();
+ QualType Arg0Type = Arg0->getType()->getPointeeType();
+
+ Value *RecordPtr = EmitScalarExpr(Arg0);
+ Value *Res = dumpRecord(*this, Arg0Type, RecordPtr, Arg0Align, Func, 0);
+ return RValue::get(Res);
+ }
+
case Builtin::BI__builtin_cimag:
case Builtin::BI__builtin_cimagf:
case Builtin::BI__builtin_cimagl:
Modified: cfe/trunk/lib/Sema/SemaChecking.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Sema/SemaChecking.cpp?rev=329762&r1=329761&r2=329762&view=diff
==============================================================================
--- cfe/trunk/lib/Sema/SemaChecking.cpp (original)
+++ cfe/trunk/lib/Sema/SemaChecking.cpp Tue Apr 10 14:58:13 2018
@@ -1105,6 +1105,63 @@ Sema::CheckBuiltinFunctionCall(FunctionD
CorrectDelayedTyposInExpr(TheCallResult.get());
return Res;
}
+ case Builtin::BI__builtin_dump_struct: {
+ // We first want to ensure we are called with 2 arguments
+ if (checkArgCount(*this, TheCall, 2))
+ return ExprError();
+ // Ensure that the first argument is of type 'struct XX *'
+ const Expr *PtrArg = TheCall->getArg(0)->IgnoreParenImpCasts();
+ const QualType PtrArgType = PtrArg->getType();
+ if (!PtrArgType->isPointerType() ||
+ !PtrArgType->getPointeeType()->isRecordType()) {
+ Diag(PtrArg->getLocStart(), diag::err_typecheck_convert_incompatible)
+ << PtrArgType << "structure pointer" << 1 << 0 << 3 << 1 << PtrArgType
+ << "structure pointer";
+ return ExprError();
+ }
+
+ // Ensure that the second argument is of type 'FunctionType'
+ const Expr *FnPtrArg = TheCall->getArg(1)->IgnoreImpCasts();
+ const QualType FnPtrArgType = FnPtrArg->getType();
+ if (!FnPtrArgType->isPointerType()) {
+ Diag(FnPtrArg->getLocStart(), diag::err_typecheck_convert_incompatible)
+ << FnPtrArgType << "'int (*)(const char *, ...)'" << 1 << 0 << 3
+ << 2 << FnPtrArgType << "'int (*)(const char *, ...)'";
+ return ExprError();
+ }
+
+ const auto *FuncType =
+ FnPtrArgType->getPointeeType()->getAs<FunctionType>();
+
+ if (!FuncType) {
+ Diag(FnPtrArg->getLocStart(), diag::err_typecheck_convert_incompatible)
+ << FnPtrArgType << "'int (*)(const char *, ...)'" << 1 << 0 << 3
+ << 2 << FnPtrArgType << "'int (*)(const char *, ...)'";
+ return ExprError();
+ }
+
+ if (const auto *FT = dyn_cast<FunctionProtoType>(FuncType)) {
+ if (!FT->getNumParams()) {
+ Diag(FnPtrArg->getLocStart(), diag::err_typecheck_convert_incompatible)
+ << FnPtrArgType << "'int (*)(const char *, ...)'" << 1 << 0 << 3
+ << 2 << FnPtrArgType << "'int (*)(const char *, ...)'";
+ return ExprError();
+ }
+ QualType PT = FT->getParamType(0);
+ if (!FT->isVariadic() || FT->getReturnType() != Context.IntTy ||
+ !PT->isPointerType() || !PT->getPointeeType()->isCharType() ||
+ !PT->getPointeeType().isConstQualified()) {
+ Diag(FnPtrArg->getLocStart(), diag::err_typecheck_convert_incompatible)
+ << FnPtrArgType << "'int (*)(const char *, ...)'" << 1 << 0 << 3
+ << 2 << FnPtrArgType << "'int (*)(const char *, ...)'";
+ return ExprError();
+ }
+ }
+
+ TheCall->setType(Context.IntTy);
+ break;
+ }
+
// check secure string manipulation functions where overflows
// are detectable at compile time
case Builtin::BI__builtin___memcpy_chk:
Added: cfe/trunk/test/CodeGen/dump-struct-builtin.c
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CodeGen/dump-struct-builtin.c?rev=329762&view=auto
==============================================================================
--- cfe/trunk/test/CodeGen/dump-struct-builtin.c (added)
+++ cfe/trunk/test/CodeGen/dump-struct-builtin.c Tue Apr 10 14:58:13 2018
@@ -0,0 +1,391 @@
+// RUN: %clang_cc1 -triple x86_64-unknown-unknown -emit-llvm %s -o - | FileCheck %s
+
+#include "Inputs/stdio.h"
+
+int printf(const char *fmt, ...) {
+ return 0;
+}
+
+void unit1() {
+ struct U1A {
+ short a;
+ };
+
+ struct U1A a = {
+ .a = 12,
+ };
+
+ // CHECK: call i32 (i8*, ...) @printf(
+ // CHECK: [[RES1:%[0-9]+]] = getelementptr inbounds %struct.U1A, %struct.U1A* %a, i32 0, i32 0
+ // CHECK: call i32 (i8*, ...) @printf(
+ // CHECK: [[LOAD1:%[0-9]+]] = load i16, i16* [[RES1]],
+ // CHECK: call i32 (i8*, ...) @printf({{.*}}, i16 [[LOAD1]])
+ // CHECK: call i32 (i8*, ...) @printf(
+ __builtin_dump_struct(&a, &printf);
+}
+
+void unit2() {
+ struct U2A {
+ unsigned short a;
+ };
+
+ struct U2A a = {
+ .a = 12,
+ };
+
+ // CHECK: call i32 (i8*, ...) @printf(
+ // CHECK: [[RES1:%[0-9]+]] = getelementptr inbounds %struct.U2A, %struct.U2A* %a, i32 0, i32 0
+ // CHECK: call i32 (i8*, ...) @printf(
+ // CHECK: [[LOAD1:%[0-9]+]] = load i16, i16* [[RES1]],
+ // CHECK: call i32 (i8*, ...) @printf({{.*}}, i16 [[LOAD1]])
+ // CHECK: call i32 (i8*, ...) @printf(
+ __builtin_dump_struct(&a, &printf);
+}
+
+void unit3() {
+ struct U3A {
+ int a;
+ };
+
+ struct U3A a = {
+ .a = 12,
+ };
+
+ // CHECK: call i32 (i8*, ...) @printf(
+ // CHECK: [[RES1:%[0-9]+]] = getelementptr inbounds %struct.U3A, %struct.U3A* %a, i32 0, i32 0
+ // CHECK: call i32 (i8*, ...) @printf(
+ // CHECK: [[LOAD1:%[0-9]+]] = load i32, i32* [[RES1]],
+ // CHECK: call i32 (i8*, ...) @printf({{.*}}, i32 [[LOAD1]])
+ // CHECK: call i32 (i8*, ...) @printf(
+ __builtin_dump_struct(&a, &printf);
+}
+
+void unit4() {
+ struct U4A {
+ unsigned int a;
+ };
+
+ struct U4A a = {
+ .a = 12,
+ };
+
+ // CHECK: call i32 (i8*, ...) @printf(
+ // CHECK: [[RES1:%[0-9]+]] = getelementptr inbounds %struct.U4A, %struct.U4A* %a, i32 0, i32 0
+ // CHECK: call i32 (i8*, ...) @printf(
+ // CHECK: [[LOAD1:%[0-9]+]] = load i32, i32* [[RES1]],
+ // CHECK: call i32 (i8*, ...) @printf({{.*}}, i32 [[LOAD1]])
+ // CHECK: call i32 (i8*, ...) @printf(
+ __builtin_dump_struct(&a, &printf);
+}
+
+void unit5() {
+ struct U5A {
+ long a;
+ };
+
+ struct U5A a = {
+ .a = 12,
+ };
+
+ // CHECK: call i32 (i8*, ...) @printf(
+ // CHECK: [[RES1:%[0-9]+]] = getelementptr inbounds %struct.U5A, %struct.U5A* %a, i32 0, i32 0
+ // CHECK: call i32 (i8*, ...) @printf(
+ // CHECK: [[LOAD1:%[0-9]+]] = load i64, i64* [[RES1]],
+ // CHECK: call i32 (i8*, ...) @printf({{.*}}, i64 [[LOAD1]])
+ // CHECK: call i32 (i8*, ...) @printf(
+ __builtin_dump_struct(&a, &printf);
+}
+
+void unit6() {
+ struct U6A {
+ unsigned long a;
+ };
+
+ struct U6A a = {
+ .a = 12,
+ };
+
+ // CHECK: call i32 (i8*, ...) @printf(
+ // CHECK: [[RES1:%[0-9]+]] = getelementptr inbounds %struct.U6A, %struct.U6A* %a, i32 0, i32 0
+ // CHECK: call i32 (i8*, ...) @printf(
+ // CHECK: [[LOAD1:%[0-9]+]] = load i64, i64* [[RES1]],
+ // CHECK: call i32 (i8*, ...) @printf({{.*}}, i64 [[LOAD1]])
+ // CHECK: call i32 (i8*, ...) @printf(
+ __builtin_dump_struct(&a, &printf);
+}
+
+void unit7() {
+ struct U7A {
+ long long a;
+ };
+
+ struct U7A a = {
+ .a = 12,
+ };
+
+ // CHECK: call i32 (i8*, ...) @printf(
+ // CHECK: [[RES1:%[0-9]+]] = getelementptr inbounds %struct.U7A, %struct.U7A* %a, i32 0, i32 0
+ // CHECK: call i32 (i8*, ...) @printf(
+ // CHECK: [[LOAD1:%[0-9]+]] = load i64, i64* [[RES1]],
+ // CHECK: call i32 (i8*, ...) @printf({{.*}}, i64 [[LOAD1]])
+ // CHECK: call i32 (i8*, ...) @printf(
+ __builtin_dump_struct(&a, &printf);
+}
+
+void unit8() {
+ struct U8A {
+ long long a;
+ };
+
+ struct U8A a = {
+ .a = 12,
+ };
+
+ // CHECK: call i32 (i8*, ...) @printf(
+ // CHECK: [[RES1:%[0-9]+]] = getelementptr inbounds %struct.U8A, %struct.U8A* %a, i32 0, i32 0
+ // CHECK: call i32 (i8*, ...) @printf(
+ // CHECK: [[LOAD1:%[0-9]+]] = load i64, i64* [[RES1]],
+ // CHECK: call i32 (i8*, ...) @printf({{.*}}, i64 [[LOAD1]])
+ // CHECK: call i32 (i8*, ...) @printf(
+ __builtin_dump_struct(&a, &printf);
+}
+
+void unit9() {
+ struct U9A {
+ char a;
+ };
+
+ struct U9A a = {
+ .a = 'a',
+ };
+
+ // CHECK: call i32 (i8*, ...) @printf(
+ // CHECK: [[RES1:%[0-9]+]] = getelementptr inbounds %struct.U9A, %struct.U9A* %a, i32 0, i32 0
+ // CHECK: call i32 (i8*, ...) @printf(
+ // CHECK: [[LOAD1:%[0-9]+]] = load i8, i8* [[RES1]],
+ // CHECK: call i32 (i8*, ...) @printf({{.*}}, i8 [[LOAD1]])
+ // CHECK: call i32 (i8*, ...) @printf(
+ __builtin_dump_struct(&a, &printf);
+}
+
+void unit10() {
+ struct U10A {
+ char *a;
+ };
+
+ struct U10A a = {
+ .a = "LSE",
+ };
+
+ // CHECK: call i32 (i8*, ...) @printf(
+ // CHECK: [[RES1:%[0-9]+]] = getelementptr inbounds %struct.U10A, %struct.U10A* %a, i32 0, i32 0
+ // CHECK: call i32 (i8*, ...) @printf(
+ // CHECK: [[LOAD1:%[0-9]+]] = load i8*, i8** [[RES1]],
+ // CHECK: call i32 (i8*, ...) @printf({{.*}}, i8* [[LOAD1]])
+ // CHECK: call i32 (i8*, ...) @printf(
+ __builtin_dump_struct(&a, &printf);
+}
+
+void unit11() {
+ struct U11A {
+ void *a;
+ };
+
+ struct U11A a = {
+ .a = (void *)0x12345678,
+ };
+
+ // CHECK: call i32 (i8*, ...) @printf(
+ // CHECK: [[RES1:%[0-9]+]] = getelementptr inbounds %struct.U11A, %struct.U11A* %a, i32 0, i32 0
+ // CHECK: call i32 (i8*, ...) @printf(
+ // CHECK: [[LOAD1:%[0-9]+]] = load i8*, i8** [[RES1]],
+ // CHECK: call i32 (i8*, ...) @printf({{.*}}, i8* [[LOAD1]])
+ // CHECK: call i32 (i8*, ...) @printf(
+ __builtin_dump_struct(&a, &printf);
+}
+
+void unit12() {
+ struct U12A {
+ const char *a;
+ };
+
+ struct U12A a = {
+ .a = "LSE",
+ };
+
+ // CHECK: call i32 (i8*, ...) @printf(
+ // CHECK: [[RES1:%[0-9]+]] = getelementptr inbounds %struct.U12A, %struct.U12A* %a, i32 0, i32 0
+ // CHECK: call i32 (i8*, ...) @printf(
+ // CHECK: [[LOAD1:%[0-9]+]] = load i8*, i8** [[RES1]],
+ // CHECK: call i32 (i8*, ...) @printf({{.*}}, i8* [[LOAD1]])
+ // CHECK: call i32 (i8*, ...) @printf(
+ __builtin_dump_struct(&a, &printf);
+}
+
+void unit13() {
+ typedef char *charstar;
+ struct U13A {
+ const charstar a;
+ };
+
+ struct U13A a = {
+ .a = "LSE",
+ };
+
+ // CHECK: call i32 (i8*, ...) @printf(
+ // CHECK: [[RES1:%[0-9]+]] = getelementptr inbounds %struct.U13A, %struct.U13A* %a, i32 0, i32 0
+ // CHECK: call i32 (i8*, ...) @printf(
+ // CHECK: [[LOAD1:%[0-9]+]] = load i8*, i8** [[RES1]],
+ // CHECK: call i32 (i8*, ...) @printf({{.*}}, i8* [[LOAD1]])
+ // CHECK: call i32 (i8*, ...) @printf(
+ __builtin_dump_struct(&a, &printf);
+}
+
+void unit14() {
+ struct U14A {
+ double a;
+ };
+
+ struct U14A a = {
+ .a = 1.123456,
+ };
+
+ // CHECK: call i32 (i8*, ...) @printf(
+ // CHECK: [[RES1:%[0-9]+]] = getelementptr inbounds %struct.U14A, %struct.U14A* %a, i32 0, i32 0
+ // CHECK: call i32 (i8*, ...) @printf(
+ // CHECK: [[LOAD1:%[0-9]+]] = load double, double* [[RES1]],
+ // CHECK: call i32 (i8*, ...) @printf({{.*}}, double [[LOAD1]])
+ // CHECK: call i32 (i8*, ...) @printf(
+ __builtin_dump_struct(&a, &printf);
+}
+
+void unit15() {
+ struct U15A {
+ int a[3];
+ };
+
+ struct U15A a = {
+ .a = {1, 2, 3},
+ };
+
+ // CHECK: call i32 (i8*, ...) @printf(
+ // CHECK: [[RES1:%[0-9]+]] = getelementptr inbounds %struct.U15A, %struct.U15A* %a, i32 0, i32 0
+ // CHECK: call i32 (i8*, ...) @printf(
+ // CHECK: [[LOAD1:%[0-9]+]] = load [3 x i32], [3 x i32]* [[RES1]],
+ // CHECK: call i32 (i8*, ...) @printf({{.*}}, [3 x i32] [[LOAD1]])
+ // CHECK: call i32 (i8*, ...) @printf(
+ __builtin_dump_struct(&a, &printf);
+}
+
+void test1() {
+ struct T1A {
+ int a;
+ char *b;
+ };
+
+ struct T1A a = {
+ .a = 12,
+ .b = "LSE",
+ };
+
+ // CHECK: call i32 (i8*, ...) @printf(
+ // CHECK: [[RES1:%[0-9]+]] = getelementptr inbounds %struct.T1A, %struct.T1A* %a, i32 0, i32 0
+ // CHECK: call i32 (i8*, ...) @printf(
+ // CHECK: [[LOAD1:%[0-9]+]] = load i32, i32* [[RES1]],
+ // CHECK: call i32 (i8*, ...) @printf({{.*}}, i32 [[LOAD1]])
+ // CHECK: [[RES2:%[0-9]+]] = getelementptr inbounds %struct.T1A, %struct.T1A* %a, i32 0, i32 1
+ // CHECK: call i32 (i8*, ...) @printf(
+ // CHECK: [[LOAD2:%[0-9]+]] = load i8*, i8** [[RES2]],
+ // CHECK: call i32 (i8*, ...) @printf({{.*}}, i8* [[LOAD2]])
+ // CHECK: call i32 (i8*, ...) @printf(
+ __builtin_dump_struct(&a, &printf);
+}
+
+void test2() {
+ struct T2A {
+ int a;
+ };
+
+ struct T2B {
+ int b;
+ struct T2A a;
+ };
+
+ struct T2B b = {
+ .b = 24,
+ .a = {
+ .a = 12,
+ }
+ };
+
+ // CHECK: call i32 (i8*, ...) @printf(
+ // CHECK: [[RES1:%[0-9]+]] = getelementptr inbounds %struct.T2B, %struct.T2B* %b, i32 0, i32 0
+ // CHECK: call i32 (i8*, ...) @printf(
+ // CHECK: [[LOAD1:%[0-9]+]] = load i32, i32* [[RES1]],
+ // CHECK: call i32 (i8*, ...) @printf({{.*}}, i32 [[LOAD1]])
+ // CHECK: [[NESTED_STRUCT:%[0-9]+]] = getelementptr inbounds %struct.T2B, %struct.T2B* %b, i32 0, i32 1
+ // CHECK: call i32 (i8*, ...) @printf(
+ // CHECK: [[RES2:%[0-9]+]] = getelementptr inbounds %struct.T2A, %struct.T2A* [[NESTED_STRUCT]], i32 0, i32 0
+ // CHECK: call i32 (i8*, ...) @printf(
+ // CHECK: [[LOAD2:%[0-9]+]] = load i32, i32* [[RES2]],
+ // CHECK: call i32 (i8*, ...) @printf({{.*}}, i32 [[LOAD2]])
+ // CHECK: call i32 (i8*, ...) @printf(
+ __builtin_dump_struct(&b, &printf);
+}
+
+void test3() {
+ struct T3A {
+ union {
+ int a;
+ char b[4];
+ };
+ };
+
+ struct T3A a = {
+ .a = 42,
+ };
+
+ // CHECK: call i32 (i8*, ...) @printf(
+ // CHECK: [[RES1:%[0-9]+]] = getelementptr inbounds %struct.T3A, %struct.T3A* %a, i32 0, i32 0
+ // CHECK: call i32 (i8*, ...) @printf(
+ // CHECK: [[BC1:%[0-9]+]] = bitcast %union.anon* [[RES1]] to i32*
+ // CHECK: [[LOAD1:%[0-9]+]] = load i32, i32* [[BC1]],
+ // CHECK: call i32 (i8*, ...) @printf({{.*}}, i32 [[LOAD1]])
+ // CHECK: [[BC2:%[0-9]+]] = bitcast %union.anon* [[RES1]] to [4 x i8]*
+ // CHECK: [[LOAD2:%[0-9]+]] = load [4 x i8], [4 x i8]* [[BC2]],
+ // CHECK: call i32 (i8*, ...) @printf({{.*}}, [4 x i8] [[LOAD2]])
+ // CHECK: call i32 (i8*, ...) @printf(
+ __builtin_dump_struct(&a, &printf);
+}
+
+void test4() {
+ struct T4A {
+ union {
+ struct {
+ void *a;
+ };
+ struct {
+ unsigned long b;
+ };
+ };
+ };
+
+ struct T4A a = {
+ .a = (void *)0x12345678,
+ };
+
+ // CHECK: call i32 (i8*, ...) @printf(
+ // CHECK: [[RES1:%[0-9]+]] = getelementptr inbounds %struct.T4A, %struct.T4A* %a, i32 0, i32 0
+ // CHECK: call i32 (i8*, ...) @printf(
+ // CHECK: [[BC1:%[0-9]+]] = bitcast %union.anon.0* [[RES1]] to %struct.anon*
+ // CHECK: [[RES2:%[0-9]+]] = getelementptr inbounds %struct.anon, %struct.anon* [[BC1]], i32 0, i32 0
+ // CHECK: [[LOAD1:%[0-9]+]] = load i8*, i8** [[RES2]],
+ // CHECK: call i32 (i8*, ...) @printf({{.*}}, i8* [[LOAD1]])
+
+ // CHECK: [[BC2:%[0-9]+]] = bitcast %union.anon.0* [[RES1]] to %struct.anon.1*
+ // CHECK: [[RES3:%[0-9]+]] = getelementptr inbounds %struct.anon.1, %struct.anon.1* [[BC2]], i32 0, i32 0
+ // CHECK: [[LOAD2:%[0-9]+]] = load i64, i64* [[RES3]],
+ // CHECK: call i32 (i8*, ...) @printf({{.*}}, i64 [[LOAD2]])
+ // CHECK: call i32 (i8*, ...) @printf(
+ __builtin_dump_struct(&a, &printf);
+}
Added: cfe/trunk/test/Sema/builtin-dump-struct.c
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/Sema/builtin-dump-struct.c?rev=329762&view=auto
==============================================================================
--- cfe/trunk/test/Sema/builtin-dump-struct.c (added)
+++ cfe/trunk/test/Sema/builtin-dump-struct.c Tue Apr 10 14:58:13 2018
@@ -0,0 +1,42 @@
+// RUN: %clang_cc1 -triple i386-unknown-unknown -fsyntax-only -fno-spell-checking -verify %s
+
+void invalid_uses() {
+ struct A {
+ };
+ struct A a;
+ void *b;
+ int (*goodfunc)(const char *, ...);
+ int (*badfunc1)(const char *);
+ int (*badfunc2)(int, ...);
+ void (*badfunc3)(const char *, ...);
+ int (*badfunc4)(char *, ...);
+ int (*badfunc5)(void);
+
+ __builtin_dump_struct(); // expected-error {{too few arguments to function call, expected 2, have 0}}
+ __builtin_dump_struct(1); // expected-error {{too few arguments to function call, expected 2, have 1}}
+ __builtin_dump_struct(1, 2); // expected-error {{passing 'int' to parameter of incompatible type structure pointer: type mismatch at 1st parameter ('int' vs structure pointer)}}
+ __builtin_dump_struct(&a, 2); // expected-error {{passing 'int' to parameter of incompatible type 'int (*)(const char *, ...)': type mismatch at 2nd parameter ('int' vs 'int (*)(const char *, ...)')}}
+ __builtin_dump_struct(b, goodfunc); // expected-error {{passing 'void *' to parameter of incompatible type structure pointer: type mismatch at 1st parameter ('void *' vs structure pointer)}}
+ __builtin_dump_struct(&a, badfunc1); // expected-error {{passing 'int (*)(const char *)' to parameter of incompatible type 'int (*)(const char *, ...)': type mismatch at 2nd parameter ('int (*)(const char *)' vs 'int (*)(const char *, ...)')}}
+ __builtin_dump_struct(&a, badfunc2); // expected-error {{passing 'int (*)(int, ...)' to parameter of incompatible type 'int (*)(const char *, ...)': type mismatch at 2nd parameter ('int (*)(int, ...)' vs 'int (*)(const char *, ...)')}}
+ __builtin_dump_struct(&a, badfunc3); // expected-error {{passing 'void (*)(const char *, ...)' to parameter of incompatible type 'int (*)(const char *, ...)': type mismatch at 2nd parameter ('void (*)(const char *, ...)' vs 'int (*)(const char *, ...)')}}
+ __builtin_dump_struct(&a, badfunc4); // expected-error {{passing 'int (*)(char *, ...)' to parameter of incompatible type 'int (*)(const char *, ...)': type mismatch at 2nd parameter ('int (*)(char *, ...)' vs 'int (*)(const char *, ...)')}}
+ __builtin_dump_struct(&a, badfunc5); // expected-error {{passing 'int (*)(void)' to parameter of incompatible type 'int (*)(const char *, ...)': type mismatch at 2nd parameter ('int (*)(void)' vs 'int (*)(const char *, ...)')}}
+ __builtin_dump_struct(a, goodfunc); // expected-error {{passing 'struct A' to parameter of incompatible type structure pointer: type mismatch at 1st parameter ('struct A' vs structure pointer)}}
+}
+
+void valid_uses() {
+ struct A {
+ };
+ union B {
+ };
+
+ int (*goodfunc)(const char *, ...);
+ int (*goodfunc2)();
+ struct A a;
+ union B b;
+
+ __builtin_dump_struct(&a, goodfunc);
+ __builtin_dump_struct(&b, goodfunc);
+ __builtin_dump_struct(&a, goodfunc2);
+}
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