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Fix for rhbz#1674031

This commit is contained in:
sergesanspaille 2019-05-22 11:36:40 +00:00
parent fe4c5544fa
commit 09654593bd
4 changed files with 249 additions and 1 deletions
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137
0001-Fix-isInSystemMacro-to-handle-pasted-macros.patch Normal file
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@ -0,0 +1,137 @@
From cb7fd3caeee52fe94461b717294c4db4056853e3 Mon Sep 17 00:00:00 2001
From: Serge Guelton <sguelton@redhat.com>
Date: Fri, 1 Feb 2019 06:11:44 +0000
Subject: [PATCH 1/3] Fix isInSystemMacro to handle pasted macros
Token pasted by the preprocessor (through ##) have a Spelling pointing to scratch buffer.
As a result they are not recognized at system macro, even though the pasting happened in
a system macro. Fix that by looking into the parent macro if the original lookup finds a
scratch buffer.
Differential Revision: https://reviews.llvm.org/D55782
This effectively fixes https://bugs.llvm.org/show_bug.cgi?id=35268,
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@352838 91177308-0d34-0410-b5e6-96231b3b80d8
---
include/clang/Basic/SourceManager.h | 18 +++++++++++++++++-
test/Misc/no-warn-in-system-macro.c | 13 +++++++++++++
test/Misc/no-warn-in-system-macro.c.inc | 9 +++++++++
test/Misc/warn-in-system-macro-def.c | 21 +++++++++++++++++++++
test/Misc/warn-in-system-macro-def.c.inc | 4 ++++
5 files changed, 64 insertions(+), 1 deletion(-)
create mode 100644 test/Misc/no-warn-in-system-macro.c
create mode 100644 test/Misc/no-warn-in-system-macro.c.inc
create mode 100644 test/Misc/warn-in-system-macro-def.c
create mode 100644 test/Misc/warn-in-system-macro-def.c.inc
diff --git a/include/clang/Basic/SourceManager.h b/include/clang/Basic/SourceManager.h
index dcc4a37e23..c6b92f9000 100644
--- a/include/clang/Basic/SourceManager.h
+++ b/include/clang/Basic/SourceManager.h
@@ -1441,6 +1441,12 @@ public:
return Filename.equals("<command line>");
}
+ /// Returns whether \p Loc is located in a <scratch space> file.
+ bool isWrittenInScratchSpace(SourceLocation Loc) const {
+ StringRef Filename(getPresumedLoc(Loc).getFilename());
+ return Filename.equals("<scratch space>");
+ }
+
/// Returns if a SourceLocation is in a system header.
bool isInSystemHeader(SourceLocation Loc) const {
return isSystem(getFileCharacteristic(Loc));
@@ -1453,7 +1459,17 @@ public:
/// Returns whether \p Loc is expanded from a macro in a system header.
bool isInSystemMacro(SourceLocation loc) const {
- return loc.isMacroID() && isInSystemHeader(getSpellingLoc(loc));
+ if(!loc.isMacroID())
+ return false;
+
+ // This happens when the macro is the result of a paste, in that case
+ // its spelling is the scratch memory, so we take the parent context.
+ if (isWrittenInScratchSpace(getSpellingLoc(loc))) {
+ return isInSystemHeader(getSpellingLoc(getImmediateMacroCallerLoc(loc)));
+ }
+ else {
+ return isInSystemHeader(getSpellingLoc(loc));
+ }
}
/// The size of the SLocEntry that \p FID represents.
diff --git a/test/Misc/no-warn-in-system-macro.c b/test/Misc/no-warn-in-system-macro.c
new file mode 100644
index 0000000000..a319b14c9c
--- /dev/null
+++ b/test/Misc/no-warn-in-system-macro.c
@@ -0,0 +1,13 @@
+// RUN: %clang_cc1 -isystem %S -Wdouble-promotion -fsyntax-only %s 2>&1 | FileCheck -allow-empty %s
+// CHECK-NOT: warning:
+
+#include <no-warn-in-system-macro.c.inc>
+
+int main(void)
+{
+ double foo = 1.0;
+
+ if (isnan(foo))
+ return 1;
+ return 0;
+}
diff --git a/test/Misc/no-warn-in-system-macro.c.inc b/test/Misc/no-warn-in-system-macro.c.inc
new file mode 100644
index 0000000000..3cbe7dfc16
--- /dev/null
+++ b/test/Misc/no-warn-in-system-macro.c.inc
@@ -0,0 +1,9 @@
+extern int __isnanf(float f);
+extern int __isnan(double f);
+extern int __isnanl(long double f);
+#define isnan(x) \
+ (sizeof (x) == sizeof (float) \
+ ? __isnanf (x) \
+ : sizeof (x) == sizeof (double) \
+ ? __isnan (x) : __isnanl (x))
+
diff --git a/test/Misc/warn-in-system-macro-def.c b/test/Misc/warn-in-system-macro-def.c
new file mode 100644
index 0000000000..b295130702
--- /dev/null
+++ b/test/Misc/warn-in-system-macro-def.c
@@ -0,0 +1,21 @@
+// RUN: %clang_cc1 -isystem %S -Wdouble-promotion -fsyntax-only %s 2>&1 | FileCheck -allow-empty %s
+// CHECK: warning:
+// CHECK: expanded from macro 'ISNAN'
+// CHECK: expanded from macro 'isnan'
+
+#include <warn-in-system-macro-def.c.inc>
+
+#define isnan(x) \
+ (sizeof (x) == sizeof (float) \
+ ? __isnanf (x) \
+ : sizeof (x) == sizeof (double) \
+ ? __isnan (x) : __isnanl (x))
+
+int main(void)
+{
+ double foo = 1.0;
+
+ if (ISNAN(foo))
+ return 1;
+ return 0;
+}
diff --git a/test/Misc/warn-in-system-macro-def.c.inc b/test/Misc/warn-in-system-macro-def.c.inc
new file mode 100644
index 0000000000..5c7e60275a
--- /dev/null
+++ b/test/Misc/warn-in-system-macro-def.c.inc
@@ -0,0 +1,4 @@
+extern int __isnanf(float f);
+extern int __isnan(double f);
+extern int __isnanl(long double f);
+#define ISNAN isnan
--
2.20.1

39
0002-Format-isInSystemMacro-after-D55782.patch Normal file
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@ -0,0 +1,39 @@
From 49b29ff9feafd8b9041e2a76cbe843115d263ced Mon Sep 17 00:00:00 2001
From: Fangrui Song <maskray@google.com>
Date: Mon, 11 Feb 2019 13:30:04 +0000
Subject: [PATCH 2/3] Format isInSystemMacro after D55782
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@353697 91177308-0d34-0410-b5e6-96231b3b80d8
---
include/clang/Basic/SourceManager.h | 10 ++++------
1 file changed, 4 insertions(+), 6 deletions(-)
diff --git a/include/clang/Basic/SourceManager.h b/include/clang/Basic/SourceManager.h
index c6b92f9000..f44239d9ce 100644
--- a/include/clang/Basic/SourceManager.h
+++ b/include/clang/Basic/SourceManager.h
@@ -1459,17 +1459,15 @@ public:
/// Returns whether \p Loc is expanded from a macro in a system header.
bool isInSystemMacro(SourceLocation loc) const {
- if(!loc.isMacroID())
+ if (!loc.isMacroID())
return false;
// This happens when the macro is the result of a paste, in that case
// its spelling is the scratch memory, so we take the parent context.
- if (isWrittenInScratchSpace(getSpellingLoc(loc))) {
+ if (isWrittenInScratchSpace(getSpellingLoc(loc)))
return isInSystemHeader(getSpellingLoc(getImmediateMacroCallerLoc(loc)));
- }
- else {
- return isInSystemHeader(getSpellingLoc(loc));
- }
+
+ return isInSystemHeader(getSpellingLoc(loc));
}
/// The size of the SLocEntry that \p FID represents.
--
2.20.1

63
0003-Fix-isInSystemMacro-in-presence-of-macro-and-pasted-.patch Normal file
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@ -0,0 +1,63 @@
From a6b7f0946df82ca207b27f1931d4b430ab77e5e0 Mon Sep 17 00:00:00 2001
From: Serge Guelton <sguelton@redhat.com>
Date: Thu, 16 May 2019 12:40:00 +0000
Subject: [PATCH 3/3] Fix isInSystemMacro in presence of macro and pasted token
When a warning is raised from the expansion of a system macro that
involves pasted token, there was still situations were they were not
skipped, as showcased by this issue:
https://bugzilla.redhat.com/show_bug.cgi?id=1472437
Differential Revision: https://reviews.llvm.org/D59413
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@360885 91177308-0d34-0410-b5e6-96231b3b80d8
---
include/clang/Basic/SourceManager.h | 9 +++++++--
test/Misc/no-warn-in-system-macro.c | 7 ++++++-
2 files changed, 13 insertions(+), 3 deletions(-)
diff --git a/include/clang/Basic/SourceManager.h b/include/clang/Basic/SourceManager.h
index f44239d9ce..c964c64faf 100644
--- a/include/clang/Basic/SourceManager.h
+++ b/include/clang/Basic/SourceManager.h
@@ -1464,8 +1464,13 @@ public:
// This happens when the macro is the result of a paste, in that case
// its spelling is the scratch memory, so we take the parent context.
- if (isWrittenInScratchSpace(getSpellingLoc(loc)))
- return isInSystemHeader(getSpellingLoc(getImmediateMacroCallerLoc(loc)));
+ // There can be several level of token pasting.
+ if (isWrittenInScratchSpace(getSpellingLoc(loc))) {
+ do {
+ loc = getImmediateMacroCallerLoc(loc);
+ } while (isWrittenInScratchSpace(getSpellingLoc(loc)));
+ return isInSystemMacro(loc);
+ }
return isInSystemHeader(getSpellingLoc(loc));
}
diff --git a/test/Misc/no-warn-in-system-macro.c b/test/Misc/no-warn-in-system-macro.c
index a319b14c9c..a351b89256 100644
--- a/test/Misc/no-warn-in-system-macro.c
+++ b/test/Misc/no-warn-in-system-macro.c
@@ -3,11 +3,16 @@
#include <no-warn-in-system-macro.c.inc>
+#define MACRO(x) x
+
int main(void)
{
double foo = 1.0;
if (isnan(foo))
return 1;
- return 0;
+
+ MACRO(isnan(foo));
+
+ return 0;
}
--
2.20.1

11
clang.spec
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@ -61,7 +61,7 @@
Name: %pkg_name
Version: %{maj_ver}.%{min_ver}.%{patch_ver}
Release: 2%{?rc_ver:.rc%{rc_ver}}%{?dist}
Release: 3%{?rc_ver:.rc%{rc_ver}}%{?dist}
Summary: A C language family front-end for LLVM
License: NCSA
@ -74,6 +74,9 @@ Source1: http://%{?rc_ver:pre}releases.llvm.org/%{version}/%{?rc_ver:rc%{rc_ver}
Patch4: 0002-gtest-reorg.patch
Patch9: 0001-Fix-uninitialized-value-in-ABIArgInfo.patch
Patch11: 0001-ToolChain-Add-lgcc_s-to-the-linker-flags-when-using-.patch
Patch12: 0001-Fix-isInSystemMacro-to-handle-pasted-macros.patch
Patch13: 0002-Format-isInSystemMacro-after-D55782.patch
Patch14: 0003-Fix-isInSystemMacro-in-presence-of-macro-and-pasted-.patch
BuildRequires: gcc
BuildRequires: gcc-c++
@ -216,6 +219,9 @@ pathfix.py -i %{__python3} -pn \
%patch4 -p1 -b .gtest
%patch9 -p1 -b .abi-arginfo
%patch11 -p1 -b .libcxx-fix
%patch12 -p1 -b .double-promotion-0
%patch13 -p1 -b .double-promotion-1
%patch14 -p1 -b .double-promotion-2
mv ../%{clang_tools_srcdir} tools/extra
@ -418,6 +424,9 @@ false
%endif
%changelog
* Thu May 16 2019 sguelton@redhat.com - 8.0.0-3
- Fix for rhbz#1674031
* Fri Apr 12 2019 sguelton@redhat.com - 8.0.0-2
- Remove useless patch thanks to GCC upgrade