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Fix RegisterValidFlag

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Return CONTEXT_VALID_NONE if register num is greater than 15 or negative.

Change-Id: I7203d9d51f54e5d589f9ea6fd62bbbaa71de3a4d
Reviewed-on: https://chromium-review.googlesource.com/c/breakpad/breakpad/+/3336256
Reviewed-by: Joshua Peraza <jperaza@chromium.org>
This commit is contained in:
Zequan Wu 2021-12-13 14:40:07 -08:00 committed by Joshua Peraza
parent 64b25d6653
commit b6510f998a
1 changed files with 4 additions and 1 deletions
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3
src/google_breakpad/processor/stack_frame_cpu.h
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@ -251,8 +251,11 @@ struct StackFrameARM : public StackFrame {
// Return the ContextValidity flag for register rN.
static ContextValidity RegisterValidFlag(int n) {
if (0 <= n && n <= 15) {
return ContextValidity(1 << n);
}
return CONTEXT_VALID_NONE;
}
// Register state. This is only fully valid for the topmost frame in a
// stack. In other frames, the values of nonvolatile registers may be