void main() {
  sint64 data;
  read(&data);
}
void read(sint64* data) {
  *data = 0;
}
运行时爆ubsan runtime warning，data地址没有按照8字节align.
data后面加__attribute__((aligned(0x10)))也不管用

compiler不知道操作sint64要对齐么？GCC 6.2.0
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FROM 178.26.114.*

确实是32位编译。关键这时候ubsan 32位库为啥还要报warning呢？

【 在 vonNeumann 的大作中提到: 】
: 32位系统？
: 很多32位ABI里面int64确实只对齐到4字节
:
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FROM 213.95.148.*

嵌入式c++了解一下

Freestanding mode removes the special semantics for the main function. In the standalone world, main can have any type signature and it is configurable whether it is main or some other function that starts the program. A typical main signature for a freestanding program is simply:

void main(void)                                // main in bare metal env


【 在 segfault 的大作中提到: 】
: 他跟谭浩强学的，别学他
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FROM 178.26.114.*