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waruqi
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Oct 18, 2025
- Before adding new features and new modules, please go to issues to submit the relevant feature description first.
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- 增加新特性和新模块之前，请先到issues提交相关特性说明，经过讨论评估确认后，再进行相应的代码提交，避免做无用工作。
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Summary of ChangesHello @waruqi, I'm Gemini Code Assist1! I'm currently reviewing this pull request and will post my feedback shortly. In the meantime, here's a summary to help you and other reviewers quickly get up to speed! This pull request focuses on improving the efficiency of file reading operations within the Highlights
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Code Review
This pull request aims to improve file reading performance by increasing the I/O buffer size. The change from a stack-allocated buffer to a heap-allocated one is a good improvement to prevent potential stack overflows with the larger buffer. However, I've found a critical issue where a memory allocation failure is not handled correctly, which could lead to a crash in production environments. I've provided a code suggestion to fix this. Additionally, I've made a suggestion to improve code maintainability by documenting a magic number.
core/src/xmake/io/file_read.c
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| xm_io_return_error(lua, "init buffer failed!"); | ||
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| tb_byte_t* data = tb_buffer_resize(&file->rcache, XM_IO_BLOCK_MAXN); | ||
| tb_assert(data); |
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tb_assert is generally disabled in release builds and should not be used for handling recoverable errors like memory allocation failure. If tb_buffer_resize returns NULL (e.g. due to out-of-memory), data will be NULL, and the subsequent call to tb_stream_read will cause a crash. This should be handled with an explicit check to ensure stability in production environments.
if (!data)
{
tb_buffer_exit(&buf);
xm_io_return_error(lua, "out of memory: failed to resize read cache");
}| /* ////////////////////////////////////////////////////////////////////////////////////// | ||
| * macros | ||
| */ | ||
| #define XM_IO_BLOCK_MAXN (TB_STREAM_BLOCK_MAXN * 10) |
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The magic number 10 is used here to increase the block size. To improve maintainability, it would be beneficial to add a comment explaining the rationale for this specific multiplier. For instance, clarifying the base size of TB_STREAM_BLOCK_MAXN and the target size of XM_IO_BLOCK_MAXN would provide valuable context for future developers.