From: Jonathan Wakely <jwakely@redhat.com>
To: Kefu Chai <tchaikov@gmail.com>
Cc: libstdc++@gcc.gnu.org
Subject: Re: [PATCH v1 0/1] Set _M_string_length before calling _M_dispose()
Date: Mon, 1 May 2023 21:05:17 +0100 [thread overview]
Message-ID: <CACb0b4nc3LNjDqf_gA4eRM3OQ8xNinL-W=kzWzgA4Np0tGvLNw@mail.gmail.com> (raw)
In-Reply-To: <CACb0b4mRnL0B0J7HDAE=4bQSUTX3=Egsih3qJQxLjyaOq-dz0A@mail.gmail.com>
[-- Attachment #1: Type: text/plain, Size: 1337 bytes --]
On Mon, 1 May 2023 at 21:04, Jonathan Wakely <jwakely@redhat.com> wrote:
>
>
> On Mon, 1 May 2023 at 08:06, Kefu Chai via Libstdc++ <
> libstdc++@gcc.gnu.org> wrote:
>
>> This patch fixes the false alarm when performing the check introduced by
>> bf78b43873b0b7e8f9a430df38749b8b61f9c9b8 . A minimal reproducer can be
>> found at https://godbolt.org/z/7q4nG68xn
>>
>> I am pasting the reproducer here just in case:
>>
>> #include <cstring>
>> #include <string>
>> #include <sstream>
>>
>> int main() {
>> unsigned char buf[sizeof(std::string)] ;
>> std::memset(buf, 0xff, sizeof(buf));
>> const char s[] = "1234567890abcdefg";
>> std::istringstream in{s};
>> std::istreambuf_iterator<char> it{in}, end;
>> auto* p = new (buf) std::string(it, end);
>> return 0;
>> }
>>
>> Tested on x86_64-pc-linux-gnu, with "make check-target-libstdc++-v3".
>> Would be great if this change can be included in thunk, 13.2 and 12
>> branches.
>>
>
> The bf78b43873b0b7e8f9a430df38749b8b61f9c9b8 change isn't on the gcc-12
> branch.
>
Oh wait, yes it is - I was thinking of another change that I didn't
backport, sorry.
>
>
>> Kefu Chai (1):
>> libstdc++: Set _M_string_length before calling _M_dispose()
>>
>> libstdc++-v3/include/bits/basic_string.tcc | 1 +
>> 1 file changed, 1 insertion(+)
>>
>> --
>> 2.40.1
>>
>>
prev parent reply other threads:[~2023-05-01 20:05 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-05-01 7:06 Kefu Chai
2023-05-01 7:06 ` [PATCH v1 1/1] libstdc++: " Kefu Chai
2023-05-02 14:06 ` Jonathan Wakely
2023-05-03 2:17 ` [PATCH v2 0/1] " Kefu Chai
2023-05-03 2:17 ` [PATCH v2 1/1] libstdc++: Set _M_string_length before calling _M_dispose() [PR109703] Kefu Chai
2023-05-03 12:22 ` [PATCH v2 0/1] Set _M_string_length before calling _M_dispose() Jonathan Wakely
2023-05-03 12:30 ` kefu chai
2023-05-01 20:04 ` [PATCH v1 " Jonathan Wakely
2023-05-01 20:05 ` Jonathan Wakely [this message]
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