Fix access to m_pDynamicStaticsInfo #97353
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davidwrighton
commented
Jan 22, 2024
davidwrighton
commented
- Remove race condition where it is possible that an updated dynamic statics info pointer is published without ensuring that the data is also considered written.
- Use VolatileLoadWithoutBarrier at the read site (where locks are not taken) to ensure that there are no difficult to examine reads of this pointer.
- Remove race condition where it is possible that an updated dynamic statics info pointer is published without ensuring that the data is also considered written. - Use VolatileLoadWithoutBarrier at the read site (where locks are not taken) to ensure that there are no difficult to examine reads of this pointer.
ghost
assigned 
jkotas
reviewed
Jan 23, 2024
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Did you see a crash caused by this issue? |
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@jkotas No, no crashes caused by this issue have been observed that I have been able to identify. |
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I would include this fix in the servicing change. The C/C++ compilers can do very surprising reordering. |
davidwrighton
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Jan 23, 2024
- Remove race condition where it is possible that an updated dynamic statics info pointer is published without ensuring that the data is also considered written. - Use VolatileLoadWithoutBarrier at the read site (where locks are not taken) to ensure that there are no difficult to examine reads of this pointer.
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jeffschwMSFT
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Feb 9, 2024
…97352) * Move a lock to protect m_pDynamicStaticsInfo * apply feedback * cast to LONG * Fix access to m_pDynamicStaticsInfo (#97353) - Remove race condition where it is possible that an updated dynamic statics info pointer is published without ensuring that the data is also considered written. - Use VolatileLoadWithoutBarrier at the read site (where locks are not taken) to ensure that there are no difficult to examine reads of this pointer. --------- Co-authored-by: Hyungju Lee <leee.lee@samsung.com> Co-authored-by: David Wrighton <davidwr@microsoft.com>
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