[clang-tools-extra] [libc++] Prevent calling the projection more than three times (PR #66315)
Jocelyn Castellano via cfe-commits
cfe-commits at lists.llvm.org
Fri Sep 15 11:21:19 PDT 2023
https://github.com/pandaninjas updated https://github.com/llvm/llvm-project/pull/66315
>From ead65bfcb70be46788bc9e88c891e7ae7f91b8d7 Mon Sep 17 00:00:00 2001
From: PandaNinjas <admin at malwarefight.wip.la>
Date: Wed, 13 Sep 2023 17:38:17 -0700
Subject: [PATCH 1/9] [libc++] Prevent calling the projection more than three
times
---
libcxx/include/__algorithm/ranges_clamp.h | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/libcxx/include/__algorithm/ranges_clamp.h b/libcxx/include/__algorithm/ranges_clamp.h
index 9613f7f37720a6c..ca46675eb4b3041 100644
--- a/libcxx/include/__algorithm/ranges_clamp.h
+++ b/libcxx/include/__algorithm/ranges_clamp.h
@@ -37,9 +37,10 @@ struct __fn {
_LIBCPP_ASSERT_UNCATEGORIZED(!bool(std::invoke(__comp, std::invoke(__proj, __high), std::invoke(__proj, __low))),
"Bad bounds passed to std::ranges::clamp");
- if (std::invoke(__comp, std::invoke(__proj, __value), std::invoke(__proj, __low)))
+ auto &projection = std::invoke(__proj, __value);
+ if (std::invoke(__comp, projection, std::invoke(__proj, __low)))
return __low;
- else if (std::invoke(__comp, std::invoke(__proj, __high), std::invoke(__proj, __value)))
+ else if (std::invoke(__comp, std::invoke(__proj, __high), projection))
return __high;
else
return __value;
>From c18d60870ac342a95a5528396a8e0c7b91717cbb Mon Sep 17 00:00:00 2001
From: PandaNinjas <admin at malwarefight.wip.la>
Date: Wed, 13 Sep 2023 18:56:44 -0700
Subject: [PATCH 2/9] [libc++] Run clang-format on file
---
libcxx/include/__algorithm/ranges_clamp.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/libcxx/include/__algorithm/ranges_clamp.h b/libcxx/include/__algorithm/ranges_clamp.h
index ca46675eb4b3041..3469a6419b2270f 100644
--- a/libcxx/include/__algorithm/ranges_clamp.h
+++ b/libcxx/include/__algorithm/ranges_clamp.h
@@ -37,7 +37,7 @@ struct __fn {
_LIBCPP_ASSERT_UNCATEGORIZED(!bool(std::invoke(__comp, std::invoke(__proj, __high), std::invoke(__proj, __low))),
"Bad bounds passed to std::ranges::clamp");
- auto &projection = std::invoke(__proj, __value);
+ auto& projection = std::invoke(__proj, __value);
if (std::invoke(__comp, projection, std::invoke(__proj, __low)))
return __low;
else if (std::invoke(__comp, std::invoke(__proj, __high), projection))
>From b40e791f0e9fedbb19936851e1e71decf00331fa Mon Sep 17 00:00:00 2001
From: Jocelyn Castellano <admin at malwarefight.wip.la>
Date: Wed, 13 Sep 2023 19:11:20 -0700
Subject: [PATCH 3/9] [libcxx] CamelCase projection and make variable name more
descriptive
---
libcxx/include/__algorithm/ranges_clamp.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/libcxx/include/__algorithm/ranges_clamp.h b/libcxx/include/__algorithm/ranges_clamp.h
index 3469a6419b2270f..3adb5fa828e1ee5 100644
--- a/libcxx/include/__algorithm/ranges_clamp.h
+++ b/libcxx/include/__algorithm/ranges_clamp.h
@@ -37,7 +37,7 @@ struct __fn {
_LIBCPP_ASSERT_UNCATEGORIZED(!bool(std::invoke(__comp, std::invoke(__proj, __high), std::invoke(__proj, __low))),
"Bad bounds passed to std::ranges::clamp");
- auto& projection = std::invoke(__proj, __value);
+ auto& ValueProjection = std::invoke(__proj, __value);
if (std::invoke(__comp, projection, std::invoke(__proj, __low)))
return __low;
else if (std::invoke(__comp, std::invoke(__proj, __high), projection))
>From a8907624defa4cc4f47520a2d93a8bd042816aa2 Mon Sep 17 00:00:00 2001
From: Jocelyn Castellano <admin at malwarefight.wip.la>
Date: Wed, 13 Sep 2023 19:11:47 -0700
Subject: [PATCH 4/9] [libcxx] properly change variable name
---
libcxx/include/__algorithm/ranges_clamp.h | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/libcxx/include/__algorithm/ranges_clamp.h b/libcxx/include/__algorithm/ranges_clamp.h
index 3adb5fa828e1ee5..3d7a224b3649a3f 100644
--- a/libcxx/include/__algorithm/ranges_clamp.h
+++ b/libcxx/include/__algorithm/ranges_clamp.h
@@ -38,9 +38,9 @@ struct __fn {
"Bad bounds passed to std::ranges::clamp");
auto& ValueProjection = std::invoke(__proj, __value);
- if (std::invoke(__comp, projection, std::invoke(__proj, __low)))
+ if (std::invoke(__comp, ValueProjection, std::invoke(__proj, __low)))
return __low;
- else if (std::invoke(__comp, std::invoke(__proj, __high), projection))
+ else if (std::invoke(__comp, std::invoke(__proj, __high), ValueProjection))
return __high;
else
return __value;
>From 15d3b2b79fbd61f97b0312e0913cede36b5b202d Mon Sep 17 00:00:00 2001
From: Jocelyn Castellano <admin at malwarefight.wip.la>
Date: Thu, 14 Sep 2023 10:37:34 -0700
Subject: [PATCH 5/9] Apply suggestions from code review
---
libcxx/include/__algorithm/ranges_clamp.h | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/libcxx/include/__algorithm/ranges_clamp.h b/libcxx/include/__algorithm/ranges_clamp.h
index 3d7a224b3649a3f..a97538e4c0e3f65 100644
--- a/libcxx/include/__algorithm/ranges_clamp.h
+++ b/libcxx/include/__algorithm/ranges_clamp.h
@@ -37,10 +37,10 @@ struct __fn {
_LIBCPP_ASSERT_UNCATEGORIZED(!bool(std::invoke(__comp, std::invoke(__proj, __high), std::invoke(__proj, __low))),
"Bad bounds passed to std::ranges::clamp");
- auto& ValueProjection = std::invoke(__proj, __value);
- if (std::invoke(__comp, ValueProjection, std::invoke(__proj, __low)))
+ auto&& __projected = std::invoke(__proj, __value);
+ if (std::invoke(__comp, std::forward(__projected), std::invoke(__proj, __low)))
return __low;
- else if (std::invoke(__comp, std::invoke(__proj, __high), ValueProjection))
+ else if (std::invoke(__comp, std::invoke(__proj, __high), std::forward(__projected)))
return __high;
else
return __value;
>From 67a6c91976c76fe1d399a81af8f45ecb549c62ec Mon Sep 17 00:00:00 2001
From: Jocelyn Castellano <admin at malwarefight.wip.la>
Date: Thu, 14 Sep 2023 11:09:55 -0700
Subject: [PATCH 6/9] [libc++] add test to ensure projection is not called more
than 3 times
---
..._not_called_more_than_three_times.pass.cpp | 20 +++++++++++++++++++
1 file changed, 20 insertions(+)
create mode 100644 libcxx/test/std/algorithms/ranges_projection_not_called_more_than_three_times.pass.cpp
diff --git a/libcxx/test/std/algorithms/ranges_projection_not_called_more_than_three_times.pass.cpp b/libcxx/test/std/algorithms/ranges_projection_not_called_more_than_three_times.pass.cpp
new file mode 100644
index 000000000000000..8d0713cd573fb34
--- /dev/null
+++ b/libcxx/test/std/algorithms/ranges_projection_not_called_more_than_three_times.pass.cpp
@@ -0,0 +1,20 @@
+#include <algorithm>
+#include <assert_macros.h>
+
+int Projection(const int value)
+{
+ static int counter = 0;
+
+ if (counter++ == 3)
+ {
+ TEST_FAIL("projection called more than 3 times")
+ }
+
+ return value;
+}
+
+int main()
+{
+ TEST_DOES_NOT_THROW(std::ranges::clamp(3, 2, 4, std::ranges::less{}, &Projection));
+ return 0;
+}
>From cf56669a8ae02b1cb0bf35ef7a37146615778008 Mon Sep 17 00:00:00 2001
From: PandaNinjas <admin at malwarefight.wip.la>
Date: Thu, 14 Sep 2023 11:10:41 -0700
Subject: [PATCH 7/9] [libc++] run clang-format on files
---
..._not_called_more_than_three_times.pass.cpp | 21 ++++++++-----------
1 file changed, 9 insertions(+), 12 deletions(-)
diff --git a/libcxx/test/std/algorithms/ranges_projection_not_called_more_than_three_times.pass.cpp b/libcxx/test/std/algorithms/ranges_projection_not_called_more_than_three_times.pass.cpp
index 8d0713cd573fb34..fd47de4eb390534 100644
--- a/libcxx/test/std/algorithms/ranges_projection_not_called_more_than_three_times.pass.cpp
+++ b/libcxx/test/std/algorithms/ranges_projection_not_called_more_than_three_times.pass.cpp
@@ -1,20 +1,17 @@
#include <algorithm>
#include <assert_macros.h>
-int Projection(const int value)
-{
- static int counter = 0;
+int Projection(const int value) {
+ static int counter = 0;
- if (counter++ == 3)
- {
- TEST_FAIL("projection called more than 3 times")
- }
+ if (counter++ == 3) {
+ TEST_FAIL("projection called more than 3 times")
+ }
- return value;
+ return value;
}
-int main()
-{
- TEST_DOES_NOT_THROW(std::ranges::clamp(3, 2, 4, std::ranges::less{}, &Projection));
- return 0;
+int main() {
+ std::ranges::clamp(3, 2, 4, std::ranges::less{}, &Projection);
+ return 0;
}
>From 04debcbd954222ce20ad3558f7b9bde42401ce75 Mon Sep 17 00:00:00 2001
From: Jocelyn Castellano <admin at malwarefight.wip.la>
Date: Thu, 14 Sep 2023 17:48:53 -0700
Subject: [PATCH 8/9] [libc++] use decltype in std::forward
---
libcxx/include/__algorithm/ranges_clamp.h | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/libcxx/include/__algorithm/ranges_clamp.h b/libcxx/include/__algorithm/ranges_clamp.h
index a97538e4c0e3f65..182aed4fc53cbed 100644
--- a/libcxx/include/__algorithm/ranges_clamp.h
+++ b/libcxx/include/__algorithm/ranges_clamp.h
@@ -38,9 +38,9 @@ struct __fn {
"Bad bounds passed to std::ranges::clamp");
auto&& __projected = std::invoke(__proj, __value);
- if (std::invoke(__comp, std::forward(__projected), std::invoke(__proj, __low)))
+ if (std::invoke(__comp, std::forward<decltype(__projected)>(__projected), std::invoke(__proj, __low)))
return __low;
- else if (std::invoke(__comp, std::invoke(__proj, __high), std::forward(__projected)))
+ else if (std::invoke(__comp, std::invoke(__proj, __high), std::forward<decltype(__projected)>(__projected))
return __high;
else
return __value;
>From a377e11f8c502ca1a6557bf90d48efdec409e2a0 Mon Sep 17 00:00:00 2001
From: PandaNinjas <admin at malwarefight.wip.la>
Date: Fri, 15 Sep 2023 10:56:31 -0700
Subject: [PATCH 9/9] Apply testing changes from code review
---
.../alg.sorting/alg.clamp/ranges.clamp.pass.cpp | 9 ++++++++-
...on_not_called_more_than_three_times.pass.cpp | 17 -----------------
2 files changed, 8 insertions(+), 18 deletions(-)
delete mode 100644 libcxx/test/std/algorithms/ranges_projection_not_called_more_than_three_times.pass.cpp
diff --git a/libcxx/test/std/algorithms/alg.sorting/alg.clamp/ranges.clamp.pass.cpp b/libcxx/test/std/algorithms/alg.sorting/alg.clamp/ranges.clamp.pass.cpp
index 036552f75de4eb4..189d8cc4d886e8e 100644
--- a/libcxx/test/std/algorithms/alg.sorting/alg.clamp/ranges.clamp.pass.cpp
+++ b/libcxx/test/std/algorithms/alg.sorting/alg.clamp/ranges.clamp.pass.cpp
@@ -108,7 +108,14 @@ constexpr bool test() {
auto prvalue_proj = [](const CheckDoubleMove& x) -> CheckDoubleMove { return x; };
assert(&std::ranges::clamp(val, low, high, moving_comp, prvalue_proj) == &val);
}
-
+ { // Make sure we don't call the projection more than three times per [alg.clamp], see #64717
+ auto projection_function = [](const int value) -> int {
+ static int counter = 0;
+ assert(counter++ != 3);
+ return value;
+ };
+ std::ranges::clamp(3, 2, 4, std::ranges::less{}, &projection_function);
+ }
return true;
}
diff --git a/libcxx/test/std/algorithms/ranges_projection_not_called_more_than_three_times.pass.cpp b/libcxx/test/std/algorithms/ranges_projection_not_called_more_than_three_times.pass.cpp
deleted file mode 100644
index fd47de4eb390534..000000000000000
--- a/libcxx/test/std/algorithms/ranges_projection_not_called_more_than_three_times.pass.cpp
+++ /dev/null
@@ -1,17 +0,0 @@
-#include <algorithm>
-#include <assert_macros.h>
-
-int Projection(const int value) {
- static int counter = 0;
-
- if (counter++ == 3) {
- TEST_FAIL("projection called more than 3 times")
- }
-
- return value;
-}
-
-int main() {
- std::ranges::clamp(3, 2, 4, std::ranges::less{}, &Projection);
- return 0;
-}
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