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* BaseTools: Improve the file saving and copying reliabilityShi, Steven2019-08-201-0/+1
| | | | | | | | | | | | | | | | | BZ:https://bugzilla.tianocore.org/show_bug.cgi?id=2079 The Basetool CopyFileOnChange() and SaveFileOnChange() functions might raise the IOError occasionally when build in Windows with multi-process and build cache enabled. The CopyFileOnChange() and SaveFileOnChange() might be invoked in multiple sub-processes simultaneously, and this patch adds global locks to sync these functions invoking which can harden their reliability. Cc: Liming Gao <liming.gao@intel.com> Cc: Bob Feng <bob.c.feng@intel.com> Signed-off-by: Steven Shi <steven.shi@intel.com> Reviewed-by: Bob Feng <bob.c.feng@intel.com>
* BaseTools: Improve the cache hit in the edk2 build cacheShi, Steven2019-08-201-0/+28
BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=1927 Current cache hash algorithm does not parse and generate the makefile to get the accurate dependency files for a module. It instead use the platform and package meta files to get the module depenedency in a quick but over approximate way. These meta files are monolithic and involve many redundant dependency for the module, which cause the module build cache miss easily. This patch introduces one more cache checkpoint and a new hash algorithm besides the current quick one. The new hash algorithm leverages the module makefile to achieve more accurate and precise dependency info for a module. When the build cache miss with the first quick hash, the Basetool will caculate new one after makefile is generated and then check again. Cc: Liming Gao <liming.gao@intel.com> Cc: Bob Feng <bob.c.feng@intel.com> Signed-off-by: Steven Shi <steven.shi@intel.com> Reviewed-by: Bob Feng <bob.c.feng@intel.com>