C++ 我可以从地址读/写时中断 gdb 吗？
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Can I have gdb break on read/write from an address?
提问by Alex
Possible Duplicate:
Can I set a breakpoint on 'memory access' in GDB?
可能的重复：
我可以在 GDB 中的“内存访问”上设置断点吗？
I have a specific location in memory that is getting corrupted, and I'd like to be able to see exactly when things write to that location. Is there any way that I can make gdb break on memory access to that particular address?
我在内存中有一个特定位置已损坏，我希望能够准确地看到写入该位置的内容。有什么方法可以让 gdb 中断对该特定地址的内存访问？
回答by Alok Save
Yes.
Using Watchpoints:
watch- only breaks on write (and only if the value changes)
rwatch- breaks on read, and
awatch- breaks on read/write.
是的。
使用观察点：
watch- 仅在写入时中断（并且仅当值更改时）
rwatch- 在读取时中断，而
awatch- 在读/写时中断。
A more detailed brief from some internet sources:
来自一些互联网资源的更详细的简介：
watch
watch is gdb's way of setting data breakpoints which will halt the execution of a program if memory changes at the specified location.
watch
watch 是 gdb 设置数据断点的方法，如果指定位置的内存发生变化，它将停止程序的执行。
watch breakpoints can either be set on the variable name or any address location.
可以在变量名或任何地址位置上设置观察断点。
watch my_variable
watch *0x12345678
where 0x12345678 is a valid address.
rwatch
rwatch (read-watch) breakpoints break the execution of code when the program tries to read from a variable or memory location.
rwatch
rwatch (read-watch) 断点在程序尝试从变量或内存位置读取时中断代码的执行。
rwatch iWasAccessed
rwatch *0x12345678
where 0x12345678 is a valid address.
awatch
awatch or access watches break execution of the program if a variable or memory location is written to or read from. In summary, awatches are watches and rwatches all in one. It is a handy way of creating one breakpoint than two separate ones.
如果写入或读取变量或内存位置，awatchawatch 或访问手表会中断程序的执行。总之，awatches 是 watch 和 rwatches 合二为一。这是一种创建一个断点而不是两个独立断点的方便方法。
awatch *0x12345678
where 0x12345678 is a valid address.
