[clang] [clang-tools-extra] Add function check for windows platform (PR #106581)
via cfe-commits
cfe-commits at lists.llvm.org
Sat Aug 31 08:15:51 PDT 2024
https://github.com/fawdlstty updated https://github.com/llvm/llvm-project/pull/106581
>From f169f3c57a0a55c1a0dbb8f965bc17a87ceb98d7 Mon Sep 17 00:00:00 2001
From: fawdlstty <f at fawdlstty.com>
Date: Fri, 30 Aug 2024 00:23:39 +0800
Subject: [PATCH 1/5] add check for windows platforms api
---
.../bugprone/NotNullTerminatedResultCheck.cpp | 2 +-
clang/docs/analyzer/checkers.rst | 2 +-
clang/include/clang/Basic/Builtins.td | 22 +++++++++++++++++++
.../Checkers/CStringChecker.cpp | 6 +++++
4 files changed, 30 insertions(+), 2 deletions(-)
diff --git a/clang-tools-extra/clang-tidy/bugprone/NotNullTerminatedResultCheck.cpp b/clang-tools-extra/clang-tidy/bugprone/NotNullTerminatedResultCheck.cpp
index 977241e91b9a93..e2cf96c88b90bd 100644
--- a/clang-tools-extra/clang-tidy/bugprone/NotNullTerminatedResultCheck.cpp
+++ b/clang-tools-extra/clang-tidy/bugprone/NotNullTerminatedResultCheck.cpp
@@ -106,7 +106,7 @@ static const CallExpr *getStrlenExpr(const MatchFinder::MatchResult &Result) {
if (const Decl *D = StrlenExpr->getCalleeDecl())
if (const FunctionDecl *FD = D->getAsFunction())
if (const IdentifierInfo *II = FD->getIdentifier())
- if (II->isStr("strlen") || II->isStr("wcslen"))
+ if (II->isStr("strlen") || II->isStr("lstrlen") || II->isStr("wcslen"))
return StrlenExpr;
return nullptr;
diff --git a/clang/docs/analyzer/checkers.rst b/clang/docs/analyzer/checkers.rst
index 89a1018e14c0e6..ca675ae37929fe 100644
--- a/clang/docs/analyzer/checkers.rst
+++ b/clang/docs/analyzer/checkers.rst
@@ -1582,7 +1582,7 @@ Check the size argument passed into C string functions for common erroneous patt
unix.cstring.NullArg (C)
""""""""""""""""""""""""
Check for null pointers being passed as arguments to C string functions:
-``strlen, strnlen, strcpy, strncpy, strcat, strncat, strcmp, strncmp, strcasecmp, strncasecmp, wcslen, wcsnlen``.
+``strlen, lstrlen, strnlen, strcpy, lstrcpy, strncpy, strcat, lstrcat, strncat, strcmp, strncmp, strcasecmp, strncasecmp, wcslen, wcsnlen``.
.. code-block:: c
diff --git a/clang/include/clang/Basic/Builtins.td b/clang/include/clang/Basic/Builtins.td
index 8668b25661dec8..cbc5fc52326ad2 100644
--- a/clang/include/clang/Basic/Builtins.td
+++ b/clang/include/clang/Basic/Builtins.td
@@ -4788,3 +4788,25 @@ def ArithmeticFence : LangBuiltin<"ALL_LANGUAGES"> {
let Attributes = [CustomTypeChecking, Constexpr];
let Prototype = "void(...)";
}
+
+// Windows - WinBase.h
+def LStrLen : LibBuiltin<"WinBase.h"> {
+ let Spellings = ["lstrlen"];
+ let Attributes = [NoThrow, Constexpr];
+ let Prototype = "int(LPCTSTR)";
+ let AddBuiltinPrefixedAlias = 1;
+}
+
+def LStrCpy : LibBuiltin<"WinBase.h"> {
+ let Spellings = ["lstrcpy"];
+ let Attributes = [NoThrow];
+ let Prototype = "LPCTSTR(LPTSTR, LPCTSTR)";
+ let AddBuiltinPrefixedAlias = 1;
+}
+
+def LStrCat : LibBuiltin<"WinBase.h"> {
+ let Spellings = ["lstrcat"];
+ let Attributes = [NoThrow];
+ let Prototype = "LPTSTR(LPTSTR, LPCTSTR)";
+ let AddBuiltinPrefixedAlias = 1;
+}
diff --git a/clang/lib/StaticAnalyzer/Checkers/CStringChecker.cpp b/clang/lib/StaticAnalyzer/Checkers/CStringChecker.cpp
index 8dd08f14b2728b..2adf538486176d 100644
--- a/clang/lib/StaticAnalyzer/Checkers/CStringChecker.cpp
+++ b/clang/lib/StaticAnalyzer/Checkers/CStringChecker.cpp
@@ -150,6 +150,8 @@ class CStringChecker : public Checker< eval::Call,
// FIXME: C23 introduces 'memset_explicit', maybe also model that
{{CDM::CLibraryMaybeHardened, {"strcpy"}, 2},
&CStringChecker::evalStrcpy},
+ {{CDM::CLibraryMaybeHardened, {"lstrcpy"}, 2},
+ &CStringChecker::evalStrcpy},
{{CDM::CLibraryMaybeHardened, {"strncpy"}, 3},
&CStringChecker::evalStrncpy},
{{CDM::CLibraryMaybeHardened, {"stpcpy"}, 2},
@@ -158,12 +160,16 @@ class CStringChecker : public Checker< eval::Call,
&CStringChecker::evalStrlcpy},
{{CDM::CLibraryMaybeHardened, {"strcat"}, 2},
&CStringChecker::evalStrcat},
+ {{CDM::CLibraryMaybeHardened, {"lstrcat"}, 2},
+ &CStringChecker::evalStrcat},
{{CDM::CLibraryMaybeHardened, {"strncat"}, 3},
&CStringChecker::evalStrncat},
{{CDM::CLibraryMaybeHardened, {"strlcat"}, 3},
&CStringChecker::evalStrlcat},
{{CDM::CLibraryMaybeHardened, {"strlen"}, 1},
&CStringChecker::evalstrLength},
+ {{CDM::CLibraryMaybeHardened, {"lstrlen"}, 1},
+ &CStringChecker::evalstrLength},
{{CDM::CLibrary, {"wcslen"}, 1}, &CStringChecker::evalstrLength},
{{CDM::CLibraryMaybeHardened, {"strnlen"}, 2},
&CStringChecker::evalstrnLength},
>From 52d40b558e14948c38c8c5f75245c5ba08bd3fea Mon Sep 17 00:00:00 2001
From: fawdlstty <f at fawdlstty.com>
Date: Fri, 30 Aug 2024 00:33:22 +0800
Subject: [PATCH 2/5] add to insecureAPI
---
clang/docs/analyzer/checkers.rst | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/clang/docs/analyzer/checkers.rst b/clang/docs/analyzer/checkers.rst
index ca675ae37929fe..7a7b1926da17b4 100644
--- a/clang/docs/analyzer/checkers.rst
+++ b/clang/docs/analyzer/checkers.rst
@@ -1256,7 +1256,7 @@ Warn on uses of inferior random number generating functions (only if arc4random
security.insecureAPI.strcpy (C)
"""""""""""""""""""""""""""""""
-Warn on uses of the ``strcpy`` and ``strcat`` functions.
+Warn on uses of the ``strcpy, lstrcpy, strcat, lstrcat`` functions.
.. code-block:: c
>From 807316cf3819405db68d0400f005ca8a47b83b11 Mon Sep 17 00:00:00 2001
From: fawdlstty <f at fawdlstty.com>
Date: Sat, 31 Aug 2024 22:08:09 +0800
Subject: [PATCH 3/5] fix check for using CLibraryMaybeHardened
---
.../bugprone/NotNullTerminatedResultCheck.cpp | 2 +-
clang/include/clang/Basic/Builtins.td | 39 ++++++++++++++-----
.../Checkers/CStringChecker.cpp | 12 +++---
3 files changed, 37 insertions(+), 16 deletions(-)
diff --git a/clang-tools-extra/clang-tidy/bugprone/NotNullTerminatedResultCheck.cpp b/clang-tools-extra/clang-tidy/bugprone/NotNullTerminatedResultCheck.cpp
index e2cf96c88b90bd..c7bcaac5712dd1 100644
--- a/clang-tools-extra/clang-tidy/bugprone/NotNullTerminatedResultCheck.cpp
+++ b/clang-tools-extra/clang-tidy/bugprone/NotNullTerminatedResultCheck.cpp
@@ -106,7 +106,7 @@ static const CallExpr *getStrlenExpr(const MatchFinder::MatchResult &Result) {
if (const Decl *D = StrlenExpr->getCalleeDecl())
if (const FunctionDecl *FD = D->getAsFunction())
if (const IdentifierInfo *II = FD->getIdentifier())
- if (II->isStr("strlen") || II->isStr("lstrlen") || II->isStr("wcslen"))
+ if (II->isStr("strlen") || II->isStr("lstrlenA") || II->isStr("lstrlenW") || II->isStr("wcslen"))
return StrlenExpr;
return nullptr;
diff --git a/clang/include/clang/Basic/Builtins.td b/clang/include/clang/Basic/Builtins.td
index cbc5fc52326ad2..7420abbc6a6717 100644
--- a/clang/include/clang/Basic/Builtins.td
+++ b/clang/include/clang/Basic/Builtins.td
@@ -4790,23 +4790,44 @@ def ArithmeticFence : LangBuiltin<"ALL_LANGUAGES"> {
}
// Windows - WinBase.h
-def LStrLen : LibBuiltin<"WinBase.h"> {
- let Spellings = ["lstrlen"];
+def LStrLenA : LibBuiltin<"WinBase.h"> {
+ let Spellings = ["lstrlenA"];
let Attributes = [NoThrow, Constexpr];
- let Prototype = "int(LPCTSTR)";
+ let Prototype = "int(const char*)";
let AddBuiltinPrefixedAlias = 1;
}
-def LStrCpy : LibBuiltin<"WinBase.h"> {
- let Spellings = ["lstrcpy"];
+def LStrLenW : LibBuiltin<"WinBase.h"> {
+ let Spellings = ["lstrlenW"];
+ let Attributes = [NoThrow, Constexpr];
+ let Prototype = "int(const wchar_t*)";
+ let AddBuiltinPrefixedAlias = 1;
+}
+
+def LStrCpyA : LibBuiltin<"WinBase.h"> {
+ let Spellings = ["lstrcpyA"];
+ let Attributes = [NoThrow];
+ let Prototype = "char*(char*, const char*)";
+ let AddBuiltinPrefixedAlias = 1;
+}
+
+def LStrCpyW : LibBuiltin<"WinBase.h"> {
+ let Spellings = ["lstrcpyW"];
+ let Attributes = [NoThrow];
+ let Prototype = "wchar_t*(wchar_t*, const wchar_t*)";
+ let AddBuiltinPrefixedAlias = 1;
+}
+
+def LStrCatA : LibBuiltin<"WinBase.h"> {
+ let Spellings = ["lstrcatA"];
let Attributes = [NoThrow];
- let Prototype = "LPCTSTR(LPTSTR, LPCTSTR)";
+ let Prototype = "char*(char*, const char*)";
let AddBuiltinPrefixedAlias = 1;
}
-def LStrCat : LibBuiltin<"WinBase.h"> {
- let Spellings = ["lstrcat"];
+def LStrCatW : LibBuiltin<"WinBase.h"> {
+ let Spellings = ["lstrcatW"];
let Attributes = [NoThrow];
- let Prototype = "LPTSTR(LPTSTR, LPCTSTR)";
+ let Prototype = "wchar_t*(wchar_t*, const wchar_t*)";
let AddBuiltinPrefixedAlias = 1;
}
diff --git a/clang/lib/StaticAnalyzer/Checkers/CStringChecker.cpp b/clang/lib/StaticAnalyzer/Checkers/CStringChecker.cpp
index 2adf538486176d..ff9baff22c2d86 100644
--- a/clang/lib/StaticAnalyzer/Checkers/CStringChecker.cpp
+++ b/clang/lib/StaticAnalyzer/Checkers/CStringChecker.cpp
@@ -150,8 +150,8 @@ class CStringChecker : public Checker< eval::Call,
// FIXME: C23 introduces 'memset_explicit', maybe also model that
{{CDM::CLibraryMaybeHardened, {"strcpy"}, 2},
&CStringChecker::evalStrcpy},
- {{CDM::CLibraryMaybeHardened, {"lstrcpy"}, 2},
- &CStringChecker::evalStrcpy},
+ {{CDM::CLibrary, {"lstrcpyA"}, 2}, &CStringChecker::evalStrcpy},
+ {{CDM::CLibrary, {"lstrcpyW"}, 2}, &CStringChecker::evalStrcpy},
{{CDM::CLibraryMaybeHardened, {"strncpy"}, 3},
&CStringChecker::evalStrncpy},
{{CDM::CLibraryMaybeHardened, {"stpcpy"}, 2},
@@ -160,16 +160,16 @@ class CStringChecker : public Checker< eval::Call,
&CStringChecker::evalStrlcpy},
{{CDM::CLibraryMaybeHardened, {"strcat"}, 2},
&CStringChecker::evalStrcat},
- {{CDM::CLibraryMaybeHardened, {"lstrcat"}, 2},
- &CStringChecker::evalStrcat},
+ {{CDM::CLibrary, {"lstrcatA"}, 2}, &CStringChecker::evalStrcat},
+ {{CDM::CLibrary, {"lstrcatW"}, 2}, &CStringChecker::evalStrcat},
{{CDM::CLibraryMaybeHardened, {"strncat"}, 3},
&CStringChecker::evalStrncat},
{{CDM::CLibraryMaybeHardened, {"strlcat"}, 3},
&CStringChecker::evalStrlcat},
{{CDM::CLibraryMaybeHardened, {"strlen"}, 1},
&CStringChecker::evalstrLength},
- {{CDM::CLibraryMaybeHardened, {"lstrlen"}, 1},
- &CStringChecker::evalstrLength},
+ {{CDM::CLibrary, {"lstrlenA"}, 1}, &CStringChecker::evalstrLength},
+ {{CDM::CLibrary, {"lstrlenW"}, 1}, &CStringChecker::evalstrLength},
{{CDM::CLibrary, {"wcslen"}, 1}, &CStringChecker::evalstrLength},
{{CDM::CLibraryMaybeHardened, {"strnlen"}, 2},
&CStringChecker::evalstrnLength},
>From d794e48fae5beb0ec9e2a0c8d6dd734b69efb9f0 Mon Sep 17 00:00:00 2001
From: fawdlstty <f at fawdlstty.com>
Date: Sat, 31 Aug 2024 22:40:16 +0800
Subject: [PATCH 4/5] modify type to char const*
---
clang/include/clang/Basic/Builtins.td | 12 ++++++------
1 file changed, 6 insertions(+), 6 deletions(-)
diff --git a/clang/include/clang/Basic/Builtins.td b/clang/include/clang/Basic/Builtins.td
index 7420abbc6a6717..1bdcb9a84eb421 100644
--- a/clang/include/clang/Basic/Builtins.td
+++ b/clang/include/clang/Basic/Builtins.td
@@ -4793,41 +4793,41 @@ def ArithmeticFence : LangBuiltin<"ALL_LANGUAGES"> {
def LStrLenA : LibBuiltin<"WinBase.h"> {
let Spellings = ["lstrlenA"];
let Attributes = [NoThrow, Constexpr];
- let Prototype = "int(const char*)";
+ let Prototype = "int(char const*)";
let AddBuiltinPrefixedAlias = 1;
}
def LStrLenW : LibBuiltin<"WinBase.h"> {
let Spellings = ["lstrlenW"];
let Attributes = [NoThrow, Constexpr];
- let Prototype = "int(const wchar_t*)";
+ let Prototype = "int(wchar_t const*)";
let AddBuiltinPrefixedAlias = 1;
}
def LStrCpyA : LibBuiltin<"WinBase.h"> {
let Spellings = ["lstrcpyA"];
let Attributes = [NoThrow];
- let Prototype = "char*(char*, const char*)";
+ let Prototype = "char*(char*, char const*)";
let AddBuiltinPrefixedAlias = 1;
}
def LStrCpyW : LibBuiltin<"WinBase.h"> {
let Spellings = ["lstrcpyW"];
let Attributes = [NoThrow];
- let Prototype = "wchar_t*(wchar_t*, const wchar_t*)";
+ let Prototype = "wchar_t*(wchar_t*, wchar_t const*)";
let AddBuiltinPrefixedAlias = 1;
}
def LStrCatA : LibBuiltin<"WinBase.h"> {
let Spellings = ["lstrcatA"];
let Attributes = [NoThrow];
- let Prototype = "char*(char*, const char*)";
+ let Prototype = "char*(char*, char const*)";
let AddBuiltinPrefixedAlias = 1;
}
def LStrCatW : LibBuiltin<"WinBase.h"> {
let Spellings = ["lstrcatW"];
let Attributes = [NoThrow];
- let Prototype = "wchar_t*(wchar_t*, const wchar_t*)";
+ let Prototype = "wchar_t*(wchar_t*, wchar_t const*)";
let AddBuiltinPrefixedAlias = 1;
}
>From f3057ada6c0225b7807fdc9e901730c1562189e2 Mon Sep 17 00:00:00 2001
From: fawdlstty <f at fawdlstty.com>
Date: Sat, 31 Aug 2024 23:15:35 +0800
Subject: [PATCH 5/5] remove from builtins
---
clang/include/clang/Basic/Builtins.td | 43 ---------------------------
1 file changed, 43 deletions(-)
diff --git a/clang/include/clang/Basic/Builtins.td b/clang/include/clang/Basic/Builtins.td
index 1bdcb9a84eb421..8668b25661dec8 100644
--- a/clang/include/clang/Basic/Builtins.td
+++ b/clang/include/clang/Basic/Builtins.td
@@ -4788,46 +4788,3 @@ def ArithmeticFence : LangBuiltin<"ALL_LANGUAGES"> {
let Attributes = [CustomTypeChecking, Constexpr];
let Prototype = "void(...)";
}
-
-// Windows - WinBase.h
-def LStrLenA : LibBuiltin<"WinBase.h"> {
- let Spellings = ["lstrlenA"];
- let Attributes = [NoThrow, Constexpr];
- let Prototype = "int(char const*)";
- let AddBuiltinPrefixedAlias = 1;
-}
-
-def LStrLenW : LibBuiltin<"WinBase.h"> {
- let Spellings = ["lstrlenW"];
- let Attributes = [NoThrow, Constexpr];
- let Prototype = "int(wchar_t const*)";
- let AddBuiltinPrefixedAlias = 1;
-}
-
-def LStrCpyA : LibBuiltin<"WinBase.h"> {
- let Spellings = ["lstrcpyA"];
- let Attributes = [NoThrow];
- let Prototype = "char*(char*, char const*)";
- let AddBuiltinPrefixedAlias = 1;
-}
-
-def LStrCpyW : LibBuiltin<"WinBase.h"> {
- let Spellings = ["lstrcpyW"];
- let Attributes = [NoThrow];
- let Prototype = "wchar_t*(wchar_t*, wchar_t const*)";
- let AddBuiltinPrefixedAlias = 1;
-}
-
-def LStrCatA : LibBuiltin<"WinBase.h"> {
- let Spellings = ["lstrcatA"];
- let Attributes = [NoThrow];
- let Prototype = "char*(char*, char const*)";
- let AddBuiltinPrefixedAlias = 1;
-}
-
-def LStrCatW : LibBuiltin<"WinBase.h"> {
- let Spellings = ["lstrcatW"];
- let Attributes = [NoThrow];
- let Prototype = "wchar_t*(wchar_t*, wchar_t const*)";
- let AddBuiltinPrefixedAlias = 1;
-}
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