Reduce memory consumption of system_category().message()#457
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BillyONeal merged 21 commits intomicrosoft:masterfrom Feb 7, 2020
sylveon:system_category_message_allocation
Merged
Reduce memory consumption of system_category().message()#457BillyONeal merged 21 commits intomicrosoft:masterfrom sylveon:system_category_message_allocation
BillyONeal merged 21 commits intomicrosoft:masterfrom
sylveon:system_category_message_allocation
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This avoids the allocation in _Winerror_message, and introduces a new version of it which uses FORMAT_MESSAGE_ALLOCATE_BUFFER to completely avoid overallocating memory Fixes #434
BillyONeal
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Jan 25, 2020
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Thanks for your contribution!
…urface of msvcp140.dll.
…le in the build twice :(
BillyONeal
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Feb 1, 2020
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@sylveon I've extracted the new functions into the import lib so that we can avoid breaking the ABI of msvcp140.dll. Please look this over after my changes and make sure you're happy with them.
Thanks for your contribution!
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Thank you, you did the hard part. I just mostly copy/pasta'd code around to make the old build system in devdiv happy :) |
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LGTM |
CaseyCarter
suggested changes
Feb 3, 2020
Co-Authored-By: Casey Carter <cartec69@gmail.com>
sylveon
commented
Feb 3, 2020
LocalFree already ignores arguments that are nullptr, and _System_error_message does not relies on the return value when deciding whether to free, meaning we can return 0 if the message is entirely whitespaces since the caller will clean up the message unconditionally
StephanTLavavej
requested changes
Feb 4, 2020
This was referenced Feb 4, 2020
* Make __msvc headers use consistent header guards. * Add tests for __std_get_string_size_without_trailing_whitespace. * Add nodiscard and explicit to things * Remove SAL * free => deallocate * Remove blank lines in places * Terse get_string_size loop * constexprize string length * Workaround DevCom-906503 * Remove no longer used <cstdlib> Also: * Fix link error in test * constexprize error tables
CaseyCarter
approved these changes
Feb 5, 2020
…sage_allocation # Conflicts: # stl/src/syserror.cpp
BillyONeal
approved these changes
Feb 6, 2020
StephanTLavavej
requested changes
Feb 7, 2020
StephanTLavavej
approved these changes
Feb 7, 2020
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@sylveon Thanks again for your contribution! |
fengjixuchui
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Feb 7, 2020
Reduce memory consumption of system_category().message() (microsoft#457)
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You're welcome! |
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Description
This avoids the allocation in
_Winerror_message, and introduces a new version of it which usesFORMAT_MESSAGE_ALLOCATE_BUFFERto completely avoid overallocating memoryFixes #434
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