logger: Create only one Context per process for mobile #38188
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The Logger::Context operates as a stack. When a new one is created, it becomes the active Context. When it gets destroyed, the previous Context is popped to become the activate one. This can lead to lifetime bugs in Envoy Mobile. If multiple engines are created, the destruction of those engines can cause indeterminate destruction of the Logger::Context objects. In this commit, the behavior is changed so that the Logger::Context initialization in mobile is done one time only, outside of StrippedMainBase. And StrippedMainBase will only initialize a Logger::Context if one is not already active. Signed-off-by: Ali Beyad <abeyad@google.com>
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The Logger::Context operates as a stack. When a new one is created, it becomes the active Context. When it gets destroyed, the previous Context is popped to become the activate one.
This can lead to lifetime bugs in Envoy Mobile. If multiple engines are created, the destruction of those engines can cause indeterminate destruction of the Logger::Context objects.
In this commit, the behavior is changed so that the Logger::Context initialization in mobile is done one time only, outside of StrippedMainBase. And StrippedMainBase will only initialize a Logger::Context if one is not already active.