Yannis Juglaret
f2ec13393e
On Windows, we use single-step execution to collect the addresses of some ntdll-internal locks that are required for deadlock-free profiling. We achieve this by setting up a vectored exception handler that handles single-step exceptions. Based on crash data, third-party antivirus software can get in the way of our handler, preventing it from running and thus letting the single-step exception escape the VEH chain. When that happens, the user will crash. This patch thus adds a SEH handler to catch the single-step exception and fail cleanly in case the exception escapes the VEH chain. This requires moving the definition of MOZ_SEH_TRY and MOZ_SEH_EXCEPT to mfbt/ so these macros are found when working with builds that don't use xpcom/, such as SpiderMonkey builds. Differential Revision: https://phabricator.services.mozilla.com/D300716
20 lines
494 B
C
20 lines
494 B
C
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozilla_SEH_h
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#define mozilla_SEH_h
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/*
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* SEH exception macros.
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*/
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#ifdef HAVE_SEH_EXCEPTIONS
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# define MOZ_SEH_TRY __try
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# define MOZ_SEH_EXCEPT(expr) __except (expr)
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#else
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# define MOZ_SEH_TRY if (true)
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# define MOZ_SEH_EXCEPT(expr) else
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#endif
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#endif /* mozilla_SEH_h */
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