steakhal wrote:
FYI this PR likely caused a crash, reported in #47.
https://github.com/llvm/llvm-project/pull/102602
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llvm-ci wrote:
LLVM Buildbot has detected a new failure on builder
`openmp-offload-libc-amdgpu-runtime` running on `omp-vega20-1` while building
`clang` at step 10 "Add check check-offload".
Full details are available at:
https://lab.llvm.org/buildbot/#/builders/73/builds/6544
Here is the r
llvm-ci wrote:
LLVM Buildbot has detected a new failure on builder `lldb-arm-ubuntu` running
on `linaro-lldb-arm-ubuntu` while building `clang` at step 6 "test".
Full details are available at:
https://lab.llvm.org/buildbot/#/builders/18/builds/4864
Here is the relevant piece of the build log
llvm-ci wrote:
LLVM Buildbot has detected a new failure on builder `fuchsia-x86_64-linux`
running on `fuchsia-debian-64-us-central1-a-1` while building `clang` at step 4
"annotate".
Full details are available at:
https://lab.llvm.org/buildbot/#/builders/11/builds/6049
Here is the relevant p
https://github.com/steakhal closed
https://github.com/llvm/llvm-project/pull/102602
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https://github.com/llvm/llvm-project/pull/102602
>From 7b4f999b39f4308cab253204e6be41ea7a70f695 Mon Sep 17 00:00:00 2001
From: Pavel Skripkin
Date: Fri, 9 Aug 2024 14:37:47 +0300
Subject: [PATCH 01/12] clang/csa: add initial support for builtin overflow
---
pskrgag wrote:
Ah, this dangling reference to rvalue... I do remember why I bind `get{Min,
Max}Value` to locals -- `ConcreteInt` takes a reference to `APSInt`, so it's
not possible to pass result of these calls directly to constructor.
https://github.com/llvm/llvm-project/pull/102602
_
https://github.com/pskrgag updated
https://github.com/llvm/llvm-project/pull/102602
>From 7b4f999b39f4308cab253204e6be41ea7a70f695 Mon Sep 17 00:00:00 2001
From: Pavel Skripkin
Date: Fri, 9 Aug 2024 14:37:47 +0300
Subject: [PATCH 01/11] clang/csa: add initial support for builtin overflow
---
https://github.com/steakhal approved this pull request.
Still LGTM
https://github.com/llvm/llvm-project/pull/102602
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https://github.com/NagyDonat approved this pull request.
Also LGTM, sorry for not responding earlier. I agree with the minor suggestions
of @steakhal .
https://github.com/llvm/llvm-project/pull/102602
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https://github.com/NagyDonat edited
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@@ -16,21 +16,93 @@
#include "clang/Basic/Builtins.h"
#include "clang/StaticAnalyzer/Checkers/BuiltinCheckerRegistration.h"
+#include "clang/StaticAnalyzer/Checkers/Taint.h"
#include "clang/StaticAnalyzer/Core/Checker.h"
#include "clang/StaticAnalyzer/Core/CheckerManager.h"
@@ -0,0 +1,30 @@
+// RUN: %clang_analyze_cc1 -analyzer-checker=core -analyzer-output text \
+// RUN: -verify %s
+
+void test_no_overflow_note(int a, int b)
+{
+ int res;
+
+ if (__builtin_add_overflow(a, b, &res)) // expected-note {{Assuming
overflow does not happen}}
-
@@ -50,6 +122,107 @@ class BuiltinFunctionChecker : public Checker {
} // namespace
+const NoteTag *BuiltinFunctionChecker::createBuiltinNoOverflowNoteTag(
+CheckerContext &C, bool bothFeasible, SVal Arg1, SVal Arg2,
+SVal Result) const {
+ return C.getNoteTag([Resul
@@ -50,6 +101,44 @@ class BuiltinFunctionChecker : public Checker {
} // namespace
+void BuiltinFunctionChecker::HandleOverflowBuiltin(const CallEvent &Call,
+ CheckerContext &C,
+
@@ -50,6 +122,107 @@ class BuiltinFunctionChecker : public Checker {
} // namespace
+const NoteTag *BuiltinFunctionChecker::createBuiltinNoOverflowNoteTag(
+CheckerContext &C, bool bothFeasible, SVal Arg1, SVal Arg2,
+SVal Result) const {
+ return C.getNoteTag([Resul
@@ -50,6 +122,107 @@ class BuiltinFunctionChecker : public Checker {
} // namespace
+const NoteTag *BuiltinFunctionChecker::createBuiltinNoOverflowNoteTag(
+CheckerContext &C, bool bothFeasible, SVal Arg1, SVal Arg2,
+SVal Result) const {
+ return C.getNoteTag([Resul
@@ -0,0 +1,157 @@
+// RUN: %clang_analyze_cc1 -triple x86_64-unknown-unknown -verify %s \
+// RUN: -analyzer-checker=core,debug.ExprInspection
+
+#define __UINT_MAX__ (__INT_MAX__ * 2U + 1U)
+#define __INT_MIN__ (-__INT_MAX__ - 1)
+
+void clang_analyzer_dump_int(int);
+void cla
@@ -50,6 +122,107 @@ class BuiltinFunctionChecker : public Checker {
} // namespace
+const NoteTag *BuiltinFunctionChecker::createBuiltinNoOverflowNoteTag(
+CheckerContext &C, bool bothFeasible, SVal Arg1, SVal Arg2,
steakhal wrote:
```suggestion
Che
@@ -0,0 +1,30 @@
+// RUN: %clang_analyze_cc1 -analyzer-checker=core -analyzer-output text \
+// RUN: -verify %s
+
+void test_no_overflow_note(int a, int b)
+{
+ int res;
+
+ if (__builtin_add_overflow(a, b, &res)) // expected-note {{Assuming
overflow does not happen}}
-
@@ -16,21 +16,93 @@
#include "clang/Basic/Builtins.h"
#include "clang/StaticAnalyzer/Checkers/BuiltinCheckerRegistration.h"
+#include "clang/StaticAnalyzer/Checkers/Taint.h"
#include "clang/StaticAnalyzer/Core/Checker.h"
#include "clang/StaticAnalyzer/Core/CheckerManager.h"
@@ -327,6 +327,8 @@ Static Analyzer
New features
+- Now CSA models `__builtin_*_overflow` functions.
steakhal wrote:
```suggestion
- Now CSA models `__builtin_*_overflow` functions. (#GH102602)
```
https://github.com/llvm/llvm-project/pull/10260
https://github.com/steakhal edited
https://github.com/llvm/llvm-project/pull/102602
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https://github.com/steakhal approved this pull request.
Looks fantastic! I have no functional remarks. I only sprinkled it with some
nits, but other than those it's perfect.
It's already good, I'll let you decide if you want to do the final touches or
not as those may be more subjective suggest
@@ -0,0 +1,157 @@
+// RUN: %clang_analyze_cc1 -triple x86_64-unknown-unknown -verify %s \
+// RUN: -analyzer-checker=core,debug.ExprInspection
+
+#define __UINT_MAX__ (__INT_MAX__ * 2U + 1U)
+#define __INT_MIN__ (-__INT_MAX__ - 1)
+
+void clang_analyzer_dump_int(int);
+void cla
pskrgag wrote:
gentle ping
https://github.com/llvm/llvm-project/pull/102602
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https://github.com/llvm/llvm-project/pull/102602
>From 7b4f999b39f4308cab253204e6be41ea7a70f695 Mon Sep 17 00:00:00 2001
From: Pavel Skripkin
Date: Fri, 9 Aug 2024 14:37:47 +0300
Subject: [PATCH 01/10] clang/csa: add initial support for builtin overflow
---
@@ -16,21 +16,93 @@
#include "clang/Basic/Builtins.h"
#include "clang/StaticAnalyzer/Checkers/BuiltinCheckerRegistration.h"
+#include "clang/StaticAnalyzer/Checkers/Taint.h"
#include "clang/StaticAnalyzer/Core/Checker.h"
#include "clang/StaticAnalyzer/Core/CheckerManager.h"
@@ -16,21 +16,93 @@
#include "clang/Basic/Builtins.h"
#include "clang/StaticAnalyzer/Checkers/BuiltinCheckerRegistration.h"
+#include "clang/StaticAnalyzer/Checkers/Taint.h"
#include "clang/StaticAnalyzer/Core/Checker.h"
#include "clang/StaticAnalyzer/Core/CheckerManager.h"
@@ -327,6 +327,8 @@ Static Analyzer
New features
+- Now CSA models `builtin_*_overflow` functions.
NagyDonat wrote:
```suggestion
- Now CSA models `__builtin_*_overflow` functions.
```
https://github.com/llvm/llvm-project/pull/102602
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https://github.com/NagyDonat commented:
I re-reviewed the commit and added two very minor remarks, otherwise LGTM.
https://github.com/llvm/llvm-project/pull/102602
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pskrgag wrote:
Hello!
Is there anything else that stops this PR? Thanks!
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@@ -50,6 +118,75 @@ class BuiltinFunctionChecker : public Checker {
} // namespace
+std::pair
+BuiltinFunctionChecker::checkOverflow(CheckerContext &C, SVal RetVal,
+ QualType Res) const {
+ ProgramStateRef State = C.getState();
+ SValBu
https://github.com/pskrgag updated
https://github.com/llvm/llvm-project/pull/102602
>From 7b4f999b39f4308cab253204e6be41ea7a70f695 Mon Sep 17 00:00:00 2001
From: Pavel Skripkin
Date: Fri, 9 Aug 2024 14:37:47 +0300
Subject: [PATCH 1/9] clang/csa: add initial support for builtin overflow
---
..
@@ -50,6 +118,75 @@ class BuiltinFunctionChecker : public Checker {
} // namespace
+std::pair
+BuiltinFunctionChecker::checkOverflow(CheckerContext &C, SVal RetVal,
+ QualType Res) const {
+ ProgramStateRef State = C.getState();
+ SValBu
@@ -50,6 +118,75 @@ class BuiltinFunctionChecker : public Checker {
} // namespace
+std::pair
+BuiltinFunctionChecker::checkOverflow(CheckerContext &C, SVal RetVal,
+ QualType Res) const {
+ ProgramStateRef State = C.getState();
+ SValBu
https://github.com/NagyDonat edited
https://github.com/llvm/llvm-project/pull/102602
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@@ -50,6 +118,75 @@ class BuiltinFunctionChecker : public Checker {
} // namespace
+std::pair
+BuiltinFunctionChecker::checkOverflow(CheckerContext &C, SVal RetVal,
+ QualType Res) const {
+ ProgramStateRef State = C.getState();
+ SValBu
https://github.com/pskrgag updated
https://github.com/llvm/llvm-project/pull/102602
>From 7b4f999b39f4308cab253204e6be41ea7a70f695 Mon Sep 17 00:00:00 2001
From: Pavel Skripkin
Date: Fri, 9 Aug 2024 14:37:47 +0300
Subject: [PATCH 1/8] clang/csa: add initial support for builtin overflow
---
..
@@ -50,6 +118,75 @@ class BuiltinFunctionChecker : public Checker {
} // namespace
+std::pair
+BuiltinFunctionChecker::checkOverflow(CheckerContext &C, SVal RetVal,
+ QualType Res) const {
+ ProgramStateRef State = C.getState();
+ SValBu
@@ -50,6 +118,75 @@ class BuiltinFunctionChecker : public Checker {
} // namespace
+std::pair
+BuiltinFunctionChecker::checkOverflow(CheckerContext &C, SVal RetVal,
+ QualType Res) const {
+ ProgramStateRef State = C.getState();
+ SValBu
@@ -50,6 +118,75 @@ class BuiltinFunctionChecker : public Checker {
} // namespace
+std::pair
+BuiltinFunctionChecker::checkOverflow(CheckerContext &C, SVal RetVal,
+ QualType Res) const {
+ ProgramStateRef State = C.getState();
+ SValBu
@@ -50,6 +118,75 @@ class BuiltinFunctionChecker : public Checker {
} // namespace
+std::pair
+BuiltinFunctionChecker::checkOverflow(CheckerContext &C, SVal RetVal,
+ QualType Res) const {
+ ProgramStateRef State = C.getState();
+ SValBu
@@ -50,6 +118,75 @@ class BuiltinFunctionChecker : public Checker {
} // namespace
+std::pair
+BuiltinFunctionChecker::checkOverflow(CheckerContext &C, SVal RetVal,
+ QualType Res) const {
+ ProgramStateRef State = C.getState();
+ SValBu
@@ -0,0 +1,157 @@
+// RUN: %clang_analyze_cc1 -triple x86_64-unknown-unknown -verify %s \
+// RUN: -analyzer-checker=core,debug.ExprInspection
+
+#define __UINT_MAX__ (__INT_MAX__ * 2U + 1U)
+#define __INT_MIN__ (-__INT_MAX__ - 1)
+
+void clang_analyzer_dump_int(int);
+void cla
@@ -0,0 +1,157 @@
+// RUN: %clang_analyze_cc1 -triple x86_64-unknown-unknown -verify %s \
+// RUN: -analyzer-checker=core,debug.ExprInspection
+
+#define __UINT_MAX__ (__INT_MAX__ * 2U + 1U)
+#define __INT_MIN__ (-__INT_MAX__ - 1)
+
+void clang_analyzer_dump_int(int);
+void cla
https://github.com/steakhal edited
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@@ -50,6 +118,75 @@ class BuiltinFunctionChecker : public Checker {
} // namespace
+std::pair
+BuiltinFunctionChecker::checkOverflow(CheckerContext &C, SVal RetVal,
+ QualType Res) const {
+ ProgramStateRef State = C.getState();
+ SValBu
https://github.com/steakhal commented:
Looks really good. I only had some notes w.r.t. note tags.
https://github.com/llvm/llvm-project/pull/102602
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pskrgag wrote:
gentle ping
https://github.com/llvm/llvm-project/pull/102602
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pskrgag wrote:
Oh, sorry for ping then. PR is not urgent at all.
Have a fun vacation! =)
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steakhal wrote:
I'm on vacation for some time now.
Maybe others can chim in. Should I ping someone?
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pskrgag wrote:
Could you, please, check the lattest vestion, if you have time?
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https://github.com/pskrgag updated
https://github.com/llvm/llvm-project/pull/102602
>From 7b4f999b39f4308cab253204e6be41ea7a70f695 Mon Sep 17 00:00:00 2001
From: Pavel Skripkin
Date: Fri, 9 Aug 2024 14:37:47 +0300
Subject: [PATCH 1/7] clang/csa: add initial support for builtin overflow
---
..
pskrgag wrote:
> Try using the Github merge workflow to avoid doing force-pushes. Those are
> destructive for inline comments done for the PR. On force-push, GH can't
> follow to which line it should migrate the existing inline comments, thus
> drops them.
>
Sorry again for fp =(. I am getti
steakhal wrote:
Try using the Github merge workflow to avoid doing force-pushes. Those are
destructive for inline comments done for the PR. On force-push, GH can't follow
to which line it should migrate the existing inline comments, thus drops them.
You should just do a fetch main, merge main,
https://github.com/NagyDonat edited
https://github.com/llvm/llvm-project/pull/102602
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@@ -50,6 +101,44 @@ class BuiltinFunctionChecker : public Checker {
} // namespace
+void BuiltinFunctionChecker::HandleOverflowBuiltin(const CallEvent &Call,
+ CheckerContext &C,
+
@@ -50,6 +101,44 @@ class BuiltinFunctionChecker : public Checker {
} // namespace
+void BuiltinFunctionChecker::HandleOverflowBuiltin(const CallEvent &Call,
+ CheckerContext &C,
+
https://github.com/pskrgag updated
https://github.com/llvm/llvm-project/pull/102602
>From 7b4f999b39f4308cab253204e6be41ea7a70f695 Mon Sep 17 00:00:00 2001
From: Pavel Skripkin
Date: Fri, 9 Aug 2024 14:37:47 +0300
Subject: [PATCH 1/6] clang/csa: add initial support for builtin overflow
---
..
@@ -50,6 +101,44 @@ class BuiltinFunctionChecker : public Checker {
} // namespace
+void BuiltinFunctionChecker::HandleOverflowBuiltin(const CallEvent &Call,
+ CheckerContext &C,
+
https://github.com/NagyDonat edited
https://github.com/llvm/llvm-project/pull/102602
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@@ -50,6 +101,44 @@ class BuiltinFunctionChecker : public Checker {
} // namespace
+void BuiltinFunctionChecker::HandleOverflowBuiltin(const CallEvent &Call,
+ CheckerContext &C,
+
https://github.com/pskrgag updated
https://github.com/llvm/llvm-project/pull/102602
>From 7b4f999b39f4308cab253204e6be41ea7a70f695 Mon Sep 17 00:00:00 2001
From: Pavel Skripkin
Date: Fri, 9 Aug 2024 14:37:47 +0300
Subject: [PATCH 1/5] clang/csa: add initial support for builtin overflow
---
..
https://github.com/NagyDonat edited
https://github.com/llvm/llvm-project/pull/102602
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@@ -50,6 +101,44 @@ class BuiltinFunctionChecker : public Checker {
} // namespace
+void BuiltinFunctionChecker::HandleOverflowBuiltin(const CallEvent &Call,
+ CheckerContext &C,
+
https://github.com/pskrgag updated
https://github.com/llvm/llvm-project/pull/102602
>From 7b4f999b39f4308cab253204e6be41ea7a70f695 Mon Sep 17 00:00:00 2001
From: Pavel Skripkin
Date: Fri, 9 Aug 2024 14:37:47 +0300
Subject: [PATCH 1/4] clang/csa: add initial support for builtin overflow
---
..
github-actions[bot] wrote:
:warning: C/C++ code formatter, clang-format found issues in your code.
:warning:
You can test this locally with the following command:
``bash
git-clang-format --diff 3364284d87035eaac9662d345d4ddee2714f8fd7
a928600fcf613ff1f85fa1e5093c7973d4b8cfb8 --e
https://github.com/pskrgag updated
https://github.com/llvm/llvm-project/pull/102602
>From 3e0fcffa8fbea5f89ab927fd897c451bcafd8e5e Mon Sep 17 00:00:00 2001
From: Pavel Skripkin
Date: Fri, 9 Aug 2024 14:37:47 +0300
Subject: [PATCH 1/4] clang/csa: add initial support for builtin overflow
---
..
https://github.com/pskrgag updated
https://github.com/llvm/llvm-project/pull/102602
>From 3e0fcffa8fbea5f89ab927fd897c451bcafd8e5e Mon Sep 17 00:00:00 2001
From: Pavel Skripkin
Date: Fri, 9 Aug 2024 14:37:47 +0300
Subject: [PATCH 1/3] clang/csa: add initial support for builtin overflow
---
..
https://github.com/pskrgag deleted
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@@ -50,6 +101,44 @@ class BuiltinFunctionChecker : public Checker {
} // namespace
+void BuiltinFunctionChecker::HandleOverflowBuiltin(const CallEvent &Call,
+ CheckerContext &C,
+
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@@ -50,6 +101,44 @@ class BuiltinFunctionChecker : public Checker {
} // namespace
+void BuiltinFunctionChecker::HandleOverflowBuiltin(const CallEvent &Call,
+ CheckerContext &C,
+
@@ -50,6 +101,44 @@ class BuiltinFunctionChecker : public Checker {
} // namespace
+void BuiltinFunctionChecker::HandleOverflowBuiltin(const CallEvent &Call,
+ CheckerContext &C,
+
https://github.com/pskrgag updated
https://github.com/llvm/llvm-project/pull/102602
>From 3e0fcffa8fbea5f89ab927fd897c451bcafd8e5e Mon Sep 17 00:00:00 2001
From: Pavel Skripkin
Date: Fri, 9 Aug 2024 14:37:47 +0300
Subject: [PATCH 1/2] clang/csa: add initial support for builtin overflow
---
..
@@ -278,6 +278,23 @@ int *mallocRegion(void) {
return mem;
}
+int *custom_calloc(size_t a, size_t b) {
+ size_t res;
+ if (__builtin_mul_overflow(a, b, &res))
+return 0;
+
+ return malloc(res);
+}
+
+int *mallocRegionOverflow(void) {
+ int *mem = (int*)custom_calloc(
@@ -21,16 +21,67 @@
#include "clang/StaticAnalyzer/Core/PathSensitive/CallDescription.h"
#include "clang/StaticAnalyzer/Core/PathSensitive/CallEvent.h"
#include "clang/StaticAnalyzer/Core/PathSensitive/CheckerContext.h"
+#include "clang/StaticAnalyzer/Core/PathSensitive/Checker
https://github.com/steakhal edited
https://github.com/llvm/llvm-project/pull/102602
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