From 76743befc8e7109ea6d4d8576af5e568025731ac Mon Sep 17 00:00:00 2001 From: YukunJ Date: Mon, 22 Jun 2026 20:25:00 -0400 Subject: [PATCH] fix: add proof for the std::pmr::vector that it only use the stack space buffer instead of heap --- documents/vol3-standard-library/13-custom-allocators.md | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/documents/vol3-standard-library/13-custom-allocators.md b/documents/vol3-standard-library/13-custom-allocators.md index aaef46587..ca89437ff 100644 --- a/documents/vol3-standard-library/13-custom-allocators.md +++ b/documents/vol3-standard-library/13-custom-allocators.md @@ -201,6 +201,8 @@ int main() v.push_back(i); } std::cout << "v.size() = " << v.size() << "\n"; + std::cout << "v.data() address = " << std::hex << v.data() << "\n"; + std::cout << "The range of stack buffer is [" << std::hex << (void *)buffer << "," << (void *)buffer+sizeof(buffer) << "]\n"; std::cout << "vector 的内存来自栈上 buffer，零全局堆分配\n"; return 0; } @@ -212,6 +214,8 @@ g++ -std=c++20 -O2 -o /tmp/pmr_test /tmp/pmr_test.cpp && /tmp/pmr_test ```text v.size() = 100 +v.data() address = 0x7fff4f3c2fdc +The range of stack buffer is [0x7fff4f3c2de0,0x7fff4f3c3de0] vector 的内存来自栈上 buffer，零全局堆分配 ```