* [PATCH] tools/nolibc: ensure fast64 integer types have 64 bits
@ 2023-05-30 9:18 Thomas Weißschuh
2023-06-04 10:50 ` Willy Tarreau
0 siblings, 1 reply; 4+ messages in thread
From: Thomas Weißschuh @ 2023-05-30 9:18 UTC (permalink / raw
To: Willy Tarreau, Shuah Khan, Paul E. McKenney, Vincent Dagonneau
Cc: linux-kernel, linux-kselftest, Thomas Weißschuh
On 32bit platforms size_t is not enough to represent [u]int_fast64_t.
Fixes: 3e9fd4e9a1d5 ("tools/nolibc: add integer types and integer limit macros")
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
---
Cc: Vincent Dagonneau <v@vda.io>
Note: We could also fall back to compiler-provided data like:
__UINT_FAST{8,16,32,64}_{TYPE,MIN,MAX}__
---
tools/include/nolibc/stdint.h | 4 ++--
tools/testing/selftests/nolibc/nolibc-test.c | 6 +++---
2 files changed, 5 insertions(+), 5 deletions(-)
diff --git a/tools/include/nolibc/stdint.h b/tools/include/nolibc/stdint.h
index c1ce4f5e0603..3fc418cfc3d7 100644
--- a/tools/include/nolibc/stdint.h
+++ b/tools/include/nolibc/stdint.h
@@ -36,8 +36,8 @@ typedef ssize_t int_fast16_t;
typedef size_t uint_fast16_t;
typedef ssize_t int_fast32_t;
typedef size_t uint_fast32_t;
-typedef ssize_t int_fast64_t;
-typedef size_t uint_fast64_t;
+typedef int64_t int_fast64_t;
+typedef uint64_t uint_fast64_t;
typedef int64_t intmax_t;
typedef uint64_t uintmax_t;
diff --git a/tools/testing/selftests/nolibc/nolibc-test.c b/tools/testing/selftests/nolibc/nolibc-test.c
index 7de46305f419..65be0317d184 100644
--- a/tools/testing/selftests/nolibc/nolibc-test.c
+++ b/tools/testing/selftests/nolibc/nolibc-test.c
@@ -696,9 +696,9 @@ int run_stdlib(int min, int max)
CASE_TEST(limit_int_fast32_min); EXPECT_EQ(1, INT_FAST32_MIN, (int_fast32_t) INTPTR_MIN); break;
CASE_TEST(limit_int_fast32_max); EXPECT_EQ(1, INT_FAST32_MAX, (int_fast32_t) INTPTR_MAX); break;
CASE_TEST(limit_uint_fast32_max); EXPECT_EQ(1, UINT_FAST32_MAX, (uint_fast32_t) UINTPTR_MAX); break;
- CASE_TEST(limit_int_fast64_min); EXPECT_EQ(1, INT_FAST64_MIN, (int_fast64_t) INTPTR_MIN); break;
- CASE_TEST(limit_int_fast64_max); EXPECT_EQ(1, INT_FAST64_MAX, (int_fast64_t) INTPTR_MAX); break;
- CASE_TEST(limit_uint_fast64_max); EXPECT_EQ(1, UINT_FAST64_MAX, (uint_fast64_t) UINTPTR_MAX); break;
+ CASE_TEST(limit_int_fast64_min); EXPECT_EQ(1, INT_FAST64_MIN, (int_fast64_t) INT64_MIN); break;
+ CASE_TEST(limit_int_fast64_max); EXPECT_EQ(1, INT_FAST64_MAX, (int_fast64_t) INT64_MAX); break;
+ CASE_TEST(limit_uint_fast64_max); EXPECT_EQ(1, UINT_FAST64_MAX, (uint_fast64_t) UINT64_MAX); break;
#if __SIZEOF_LONG__ == 8
CASE_TEST(limit_intptr_min); EXPECT_EQ(1, INTPTR_MIN, (intptr_t) 0x8000000000000000LL); break;
CASE_TEST(limit_intptr_max); EXPECT_EQ(1, INTPTR_MAX, (intptr_t) 0x7fffffffffffffffLL); break;
---
base-commit: 5b21219d67d3483144d10332709d0c04f733ab93
change-id: 20230530-nolibc-fast64-8777cdbc7e01
Best regards,
--
Thomas Weißschuh <linux@weissschuh.net>
^ permalink raw reply related [flat|nested] 4+ messages in thread
* Re: [PATCH] tools/nolibc: ensure fast64 integer types have 64 bits
2023-05-30 9:18 [PATCH] tools/nolibc: ensure fast64 integer types have 64 bits Thomas Weißschuh
@ 2023-06-04 10:50 ` Willy Tarreau
2023-06-04 11:59 ` Willy Tarreau
0 siblings, 1 reply; 4+ messages in thread
From: Willy Tarreau @ 2023-06-04 10:50 UTC (permalink / raw
To: Thomas Weißschuh
Cc: Shuah Khan, Paul E. McKenney, Vincent Dagonneau, linux-kernel,
linux-kselftest
On Tue, May 30, 2023 at 11:18:00AM +0200, Thomas Weißschuh wrote:
> On 32bit platforms size_t is not enough to represent [u]int_fast64_t.
>
> Fixes: 3e9fd4e9a1d5 ("tools/nolibc: add integer types and integer limit macros")
> Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
> ---
> Cc: Vincent Dagonneau <v@vda.io>
>
> Note: We could also fall back to compiler-provided data like:
>
> __UINT_FAST{8,16,32,64}_{TYPE,MIN,MAX}__
I'm fine with the way you did it. I'm wondering how we managed to miss
this one given the tests in place!
Now queued, thank you Thomas.
Willy
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH] tools/nolibc: ensure fast64 integer types have 64 bits
2023-06-04 10:50 ` Willy Tarreau
@ 2023-06-04 11:59 ` Willy Tarreau
2023-06-04 12:03 ` Thomas Weißschuh
0 siblings, 1 reply; 4+ messages in thread
From: Willy Tarreau @ 2023-06-04 11:59 UTC (permalink / raw
To: Thomas Weißschuh
Cc: Shuah Khan, Paul E. McKenney, Vincent Dagonneau, linux-kernel,
linux-kselftest
On Sun, Jun 04, 2023 at 12:50:03PM +0200, Willy Tarreau wrote:
> On Tue, May 30, 2023 at 11:18:00AM +0200, Thomas Weißschuh wrote:
> > On 32bit platforms size_t is not enough to represent [u]int_fast64_t.
> >
> > Fixes: 3e9fd4e9a1d5 ("tools/nolibc: add integer types and integer limit macros")
> > Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
> > ---
> > Cc: Vincent Dagonneau <v@vda.io>
> >
> > Note: We could also fall back to compiler-provided data like:
> >
> > __UINT_FAST{8,16,32,64}_{TYPE,MIN,MAX}__
>
> I'm fine with the way you did it. I'm wondering how we managed to miss
> this one given the tests in place!
BTW, it failed on 32-bit platforms:
4407 tests passed, 84 skipped, 63 failed
$ grep '^linux_arch\|FAIL' test14.out
linux_arch=i386 qemu_arch=i386 gcc_arch=i386
52 limit_int_fast64_min = -2147483648 [FAIL]
53 limit_int_fast64_max = 2147483647 [FAIL]
54 limit_uint_fast64_max = 4294967295 [FAIL]
The reason is that the constants also have to be adjusted. With the fix
below everything works right:
--- a/tools/include/nolibc/stdint.h
+++ b/tools/include/nolibc/stdint.h
@@ -84,17 +84,17 @@ typedef uint64_t uintmax_t;
#define INT_FAST8_MIN INT8_MIN
#define INT_FAST16_MIN INTPTR_MIN
#define INT_FAST32_MIN INTPTR_MIN
-#define INT_FAST64_MIN INTPTR_MIN
+#define INT_FAST64_MIN INT64_MIN
#define INT_FAST8_MAX INT8_MAX
#define INT_FAST16_MAX INTPTR_MAX
#define INT_FAST32_MAX INTPTR_MAX
-#define INT_FAST64_MAX INTPTR_MAX
+#define INT_FAST64_MAX INT64_MAX
#define UINT_FAST8_MAX UINT8_MAX
#define UINT_FAST16_MAX SIZE_MAX
#define UINT_FAST32_MAX SIZE_MAX
-#define UINT_FAST64_MAX SIZE_MAX
+#define UINT_FAST64_MAX UINT64_MAX
#ifndef INT_MIN
#define INT_MIN (-__INT_MAX__ - 1)
4470 tests passed, 84 skipped, 0 failed
$ grep '^linux_arch\|fast64' test15.out
linux_arch=i386 qemu_arch=i386 gcc_arch=i386
52 limit_int_fast64_min = -9223372036854775808 [OK]
53 limit_int_fast64_max = 9223372036854775807 [OK]
54 limit_uint_fast64_max = -1 [OK]
If you're fine with it, I'll squash it into your patch.
Thanks,
Willy
^ permalink raw reply [flat|nested] 4+ messages in thread
* Re: [PATCH] tools/nolibc: ensure fast64 integer types have 64 bits
2023-06-04 11:59 ` Willy Tarreau
@ 2023-06-04 12:03 ` Thomas Weißschuh
0 siblings, 0 replies; 4+ messages in thread
From: Thomas Weißschuh @ 2023-06-04 12:03 UTC (permalink / raw
To: Willy Tarreau
Cc: Shuah Khan, Paul E. McKenney, Vincent Dagonneau, linux-kernel,
linux-kselftest
On 2023-06-04 13:59:42+0200, Willy Tarreau wrote:
> On Sun, Jun 04, 2023 at 12:50:03PM +0200, Willy Tarreau wrote:
> > On Tue, May 30, 2023 at 11:18:00AM +0200, Thomas Weißschuh wrote:
> > > On 32bit platforms size_t is not enough to represent [u]int_fast64_t.
> > >
> > > Fixes: 3e9fd4e9a1d5 ("tools/nolibc: add integer types and integer limit macros")
> > > Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
> > > ---
> > > Cc: Vincent Dagonneau <v@vda.io>
> > >
> > > Note: We could also fall back to compiler-provided data like:
> > >
> > > __UINT_FAST{8,16,32,64}_{TYPE,MIN,MAX}__
> >
> > I'm fine with the way you did it. I'm wondering how we managed to miss
> > this one given the tests in place!
>
> BTW, it failed on 32-bit platforms:
>
> 4407 tests passed, 84 skipped, 63 failed
> $ grep '^linux_arch\|FAIL' test14.out
> linux_arch=i386 qemu_arch=i386 gcc_arch=i386
> 52 limit_int_fast64_min = -2147483648 [FAIL]
> 53 limit_int_fast64_max = 2147483647 [FAIL]
> 54 limit_uint_fast64_max = 4294967295 [FAIL]
>
> The reason is that the constants also have to be adjusted. With the fix
> below everything works right:
>
> --- a/tools/include/nolibc/stdint.h
> +++ b/tools/include/nolibc/stdint.h
> @@ -84,17 +84,17 @@ typedef uint64_t uintmax_t;
> #define INT_FAST8_MIN INT8_MIN
> #define INT_FAST16_MIN INTPTR_MIN
> #define INT_FAST32_MIN INTPTR_MIN
> -#define INT_FAST64_MIN INTPTR_MIN
> +#define INT_FAST64_MIN INT64_MIN
>
> #define INT_FAST8_MAX INT8_MAX
> #define INT_FAST16_MAX INTPTR_MAX
> #define INT_FAST32_MAX INTPTR_MAX
> -#define INT_FAST64_MAX INTPTR_MAX
> +#define INT_FAST64_MAX INT64_MAX
>
> #define UINT_FAST8_MAX UINT8_MAX
> #define UINT_FAST16_MAX SIZE_MAX
> #define UINT_FAST32_MAX SIZE_MAX
> -#define UINT_FAST64_MAX SIZE_MAX
> +#define UINT_FAST64_MAX UINT64_MAX
>
> #ifndef INT_MIN
> #define INT_MIN (-__INT_MAX__ - 1)
>
>
> 4470 tests passed, 84 skipped, 0 failed
> $ grep '^linux_arch\|fast64' test15.out
> linux_arch=i386 qemu_arch=i386 gcc_arch=i386
> 52 limit_int_fast64_min = -9223372036854775808 [OK]
> 53 limit_int_fast64_max = 9223372036854775807 [OK]
> 54 limit_uint_fast64_max = -1 [OK]
>
> If you're fine with it, I'll squash it into your patch.
Yes, please do so.
Fitting quote:
"I'm wondering how we managed to miss this one given the tests in place!"
^ permalink raw reply [flat|nested] 4+ messages in thread
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2023-05-30 9:18 [PATCH] tools/nolibc: ensure fast64 integer types have 64 bits Thomas Weißschuh
2023-06-04 10:50 ` Willy Tarreau
2023-06-04 11:59 ` Willy Tarreau
2023-06-04 12:03 ` Thomas Weißschuh
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