Time to string exact

[blegat]

On my system, I am getting a segmentation fault. The issue is that all these are evaluated to false https://github.com/wolfpld/tracy/blob/a03c7580b9101df3225937524e09a9a885d5464a/server/TracyPrint.cpp#L262 https://github.com/wolfpld/tracy/blob/a03c7580b9101df3225937524e09a9a885d5464a/server/TracyPrint.cpp#L285 https://github.com/wolfpld/tracy/blob/a03c7580b9101df3225937524e09a9a885d5464a/server/TracyPrint.cpp#L297 https://github.com/wolfpld/tracy/blob/a03c7580b9101df3225937524e09a9a885d5464a/server/TracyPrint.cpp#L306 and then the errors occurs in https://github.com/wolfpld/tracy/blob/a03c7580b9101df3225937524e09a9a885d5464a/server/TracyPrint.cpp#L72-L91 Here is a minimal reproducer

#include <stdio.h>
#include <stdint.h>
#include <iostream>
#include <limits>

void ko(int64_t _ns)
{
    std::cout << "KO" << std::endl;
    std::cout << _ns << std::endl;
    uint64_t ns;
    if( _ns < 0 )
    {
        ns = -_ns;
    }
    else
    {
        ns = _ns;
    }
    std::cout << ns << std::endl;
    std::cout << 1000ll << std::endl;
    std::cout << (ns >= 1000ll) << std::endl;
}

void ok(int64_t _ns)
{
    std::cout << "OK" << std::endl;
    std::cout << _ns << std::endl;
    uint64_t ns;
    if( _ns == std::numeric_limits<int64_t>::min() )
    {
        ns = -(_ns + 1) + 1;
    }
    else if( _ns < 0 )
    {
        ns = -_ns;
    }
    else
    {
        ns = _ns;
    }
    std::cout << ns << std::endl;
    std::cout << 1000ll << std::endl;
    std::cout << (ns >= 1000ll) << std::endl;
}

int main() {
    ko(-9223372036854775808ULL);
    ok(-9223372036854775808ULL);
    return 0;
}

Then I can reproduce the issue with g++ with -O2 or -O3 but not clang++

$ g++ -O3 main.cpp && ./a.out
KO
-9223372036854775808
9223372036854775808
1000
0
OK
-9223372036854775808
9223372036854775808
1000
1
$ g++ -O1 main.cpp && ./a.out
KO
-9223372036854775808
9223372036854775808
1000
1
OK
-9223372036854775808
9223372036854775808
1000
1
$ clang++ -O3 main.cpp && ./a.out
KO
-9223372036854775808
9223372036854775808
1000
1
OK
-9223372036854775808
9223372036854775808
1000
1

The way I understand the issue is that -_ns does not fit in int64_t even though it fits in uint64_t. So the idea is to first convert to uint64_t and then do +1. My gcc version is

$ g++ --version
g++ (GCC) 15.1.1 20250425
$ uname -a
Linux Precision5570 6.14.4-arch1-2 #1 SMP PREEMPT_DYNAMIC Tue, 29 Apr 2025 09:23:13 +0000 x86_64 GNU/Linux