调试器误导导致开发者困惑
问题概述
多位开发者报告调试器在变量显示、缓存信息、控制流解析和函数调用报告等方面提供错误或陈旧的信息，导致调试过程混乱、耗时，甚至在低级或 JIT 环境中产生安全隐患。
痛点标签
- 调试器显示错误的变量值
- 调试器缓存陈旧导致信息不准确
- 调试器对控制流的误解导致程序崩溃或非法指令
- 调试器报告不存在的函数调用
待验证问题
- 您是否愿意为一个能够在优化或 JIT 代码中保证准确变量检查的调试器付费？
- 您是否经常遇到调试器视图与实际程序状态不一致，需要手动验证？
- 更好地将调试信息（如 DWARF、PDB）与运行时环境集成是否能提升您的调试体验？
证据
原话 · @Anonymous
Reminds me of the time when visual studio would show one value of a variable, but print would show a different one. Never trusted VS again after that.
原话 · @Anonymous
WinDbg has the same stale-cache trap on live Windows targets.
原话 · @Anonymous
Once upon a time I had to figure out an issue where I forgot a `return` statement at the end of a non-`void` function, so the C++ compiler happily omitted both RETs for some reason and let the program go straight into illegal instructions. That was fun to debug (not fun, I practically had to single-step through the entire program) because every time this happened the debugger was incredibly confused about what the fuck was going on and nothing made any sense.
原话 · @Anonymous
Debuggers can lie pretty often. Especially if you are just doing things with ASM. I had some issues with V8 debugging and the debugger just saying that a function got called which for sure wasn't. Even with the option that V8 should emit gdb info /
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