Ben Langmuir 487ea14a46 Add a "signature" to AST files to verify that they haven't changed ... Since the order of the IDs in the AST file (e.g. DeclIDs, SelectorIDs) is not stable, it is not safe to load an AST file that depends on another AST file that has been rebuilt since the importer was built, even if "nothing changed". We previously used size and modtime to check this, but I've seen cases where a module rebuilt quickly enough to foil this check and caused very hard to debug build errors. To save cycles when we're loading the AST, we just generate a random nonce value and check that it hasn't changed when we load an imported module, rather than actually hash the whole file. This is slightly complicated by the fact that we need to verify the signature inside addModule, since we might otherwise consider that a mdoule is "OutOfDate" when really it is the importer that is out of date. I didn't see any regressions in module load time after this change. llvm-svn: 220493		2014-10-23 18:05:36 +00:00
..
ASTCommon.cpp	[modules] Make NamespaceAliasDecl redeclarable, as it should be. This fixes	2014-09-03 23:11:22 +00:00
ASTCommon.h	[modules] Number anonymous declarations that are lexically within mergeable	2014-08-28 01:33:39 +00:00
ASTReader.cpp	Add a "signature" to AST files to verify that they haven't changed	2014-10-23 18:05:36 +00:00
ASTReaderDecl.cpp	[modules] Initial support for explicitly loading .pcm files.	2014-10-22 02:05:46 +00:00
ASTReaderInternals.h	Header guard canonicalization, clang part.	2014-08-13 16:25:19 +00:00
ASTReaderStmt.cpp	Removing the setLBracLoc and setRBracLoc functions from CompoundStmt -- their only use was with the AST reader, and friendship can be used to handle that. Drive-by rename of "Brac" to "Brace" for the private data members. NFC.	2014-10-22 21:06:18 +00:00
ASTWriter.cpp	Add a "signature" to AST files to verify that they haven't changed	2014-10-23 18:05:36 +00:00
ASTWriterDecl.cpp	Change how we distinguish bitfield widths, in-class	2014-10-10 18:44:34 +00:00
ASTWriterStmt.cpp	[OPENMP] Codegen for 'private' clause in 'parallel' directive.	2014-10-21 03:16:40 +00:00
CMakeLists.txt	[CMake] Use LINK_LIBS instead of target_link_libraries().	2014-02-26 06:41:29 +00:00
GeneratePCH.cpp	[C++11] Use 'nullptr'. Serialization edition.	2014-05-22 05:54:18 +00:00
GlobalModuleIndex.cpp	Add a "signature" to AST files to verify that they haven't changed	2014-10-23 18:05:36 +00:00
Makefile	…
Module.cpp	Add a "signature" to AST files to verify that they haven't changed	2014-10-23 18:05:36 +00:00
ModuleManager.cpp	Add a "signature" to AST files to verify that they haven't changed	2014-10-23 18:05:36 +00:00