proc: adds pointer pinning to call injection #3787
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This commit adds a new mode to call injection. If the runtime.debugPinner function is available in the target executable it obtains a pinner by calling it and then uses it to pin the pointers in the results of call injection. This allows the code for call injection to be refactored to execute the calls in the normal order, since it doesn't need to be concerned with having space on the target's memory to store intermediate values. Updates go-delve#3310
aarzilli
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derekparker
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Sep 18, 2024
| @@ -182,9 +182,17 @@ func GoroutineScope(t *Target, thread Thread) (*EvalScope, error) { | |||
| return FrameToScope(t, thread.ProcessMemory(), g, threadID, locations...), nil | |||
| } | |||
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| func (scope *EvalScope) evalopFlags() evalop.Flags { | |||
| flags := evalop.Flags(0) | |||
| if scope.BinInfo.lookupOneFunc(evalop.DebugPinnerFunctionName) != nil { | |||
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May be worth memoizing this.
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Also, this is the same as calling BinInfo.HasDebugPinner().
| fncall.undoInjection = nil | ||
| regs, err := curthread.Registers() | ||
| if err == nil { | ||
| callInjectionComplete2(scope, scope.BinInfo, stack.fncallPeek(), regs, curthread) |
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Could replace the extra call to stack.fncallPeek with the fncall local, no?
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This commit adds a new mode to call injection. If the runtime.debugPinner
function is available in the target executable it obtains a pinner by
calling it and then uses it to pin the pointers in the results of call
injection.
This allows the code for call injection to be refactored to execute the
calls in the normal order, since it doesn't need to be concerned with having
space on the target's memory to store intermediate values.
Updates #3310