Commit Graph

85 Commits

Author SHA1 Message Date
Thomas Jarosch 4038d4b562 Place main code into own function 2013-01-12 15:28:38 +01:00
Thomas Jarosch fdcfbd5ff9 Add missing copyright header 2013-01-10 11:10:45 +01:00
Edoardo Prezioso 6236e1dc38 Token::Match: removed harmless special code for initial '!!foo' patterns. 2013-01-09 20:13:33 +01:00
Thomas Jarosch de36324d62 Match compiler: Add cmdline handling 2013-01-09 19:41:03 +01:00
Thomas Jarosch 97e1e50139 Match compiler: Workaround broken code generation for "!!foo" patterns
This is just meant for the upcoming release.
2013-01-09 19:25:24 +01:00
Thomas Jarosch e1be85a552 Match compiler: Be more user friendly on how to invoke it 2013-01-09 19:22:40 +01:00
Thomas Jarosch ade0b741b7 Match compiler: Create 'build' directory if needed 2013-01-09 19:15:13 +01:00
Thomas Jarosch 982503f457 Match compiler: Workaround broken optimizations in verify mode
If the match compiler uses the 'verify' mode and we
compile with -O2, some tests comparing the on-the-fly-parser
to the compiled match fail.

Small functions are inlined by the -O2 compile flag.
If we disable function inlining and still compile with -O2,
everything is back to normal.

gdb didn't show anything useful during the mismatch
since the needed variables are optimized out. Once
we start printing them, the problem vanishes, too.
-> Can only be diagnosed at the x86 assembly level.

The problem vanished by switching the invocation order
of Token::Match() and the compiled match, so just swap them.

Also add commented out helper code
to better diagnose mismatch problems.
2013-01-09 19:03:42 +01:00
Thomas Jarosch 9970414a2f Match compiler: Implement 'verify mode' for Token::Match
Verify mode runs the same ::Match pattern on a token
using the on-the-fly parser and the compiled match parser.
The result is compared and we abort on mismatch.

Already detected an error in our test suite, needs investigation.
2013-01-07 22:27:57 +01:00
Thomas Jarosch 9b51d81e99 Match compiler: Split _replaceTokenMatch() into two small functions 2013-01-07 21:39:49 +01:00
Thomas Jarosch 3918948dd5 Match compiler: Aggregate match functions with the same pattern / function call signature
Reduces the number of generated functions from 2290 to 1916.
2013-01-04 04:47:01 +01:00
Thomas Jarosch 5f09cb2e4d Match compiler: Store matchFunctions and matchStrs in the class instead of passing it around 2013-01-04 03:56:21 +01:00
Thomas Jarosch 542c6e82d3 Match compiler: Cosmetic changes after running pylint 2013-01-04 03:44:04 +01:00
Thomas Jarosch 71a236b3df Match compiler: Turn code into a python class
This will make passing around internal states a lot easier
2013-01-04 03:38:40 +01:00
Thomas Jarosch f9c752667e Match compiler: Inline generated pattern match code for Token::findmatch
Verified the output in build/ stayed the same
if Token::findmatch support is disabled.
2013-01-04 03:13:22 +01:00
Thomas Jarosch 4b386986fc Match compiler: Check varid on first use like Token::Match does 2013-01-04 01:14:52 +01:00
Thomas Jarosch 5d5efdf99f Match compiler: Add support for Token::findmatch
(still disabled for performance reasons)
2013-01-04 01:01:57 +01:00
Thomas Jarosch 7417144784 Match compiler: Compile Token::findsimplematch() calls
Disabled for now as it runs slowers than before.
2013-01-03 19:33:37 +01:00
Thomas Jarosch 62b05193c4 MC: Split convertFile() function into smaller pieces
Output of build/ stayed the same.
2012-12-31 15:30:27 +01:00
Thomas Jarosch 311630ac1c Match compiler: Python syntax simplification
Output in build/ stayed the same
2012-12-31 15:03:00 +01:00
Thomas Jarosch 51cff0cb9b Match compiler: Speed up Token comparison with string literals. Ticket #4451
"Cache" string literals as C++ std::string objects.
The string length gets cached and so we don't need to
call strlen() on the literals at runtime.
2012-12-31 14:45:16 +01:00
Thomas Jarosch 3c915b534d Match compiler: Collect and cache plain C-strings
Profiler runs with gperftools showed we were spending
a lot of time in strlen() even with compiled match patterns.

If you compare a std::string with a plain C-string,
the comparison operator needs to calculate the length
of the C-string via strlen().

We can avoid this by turning all C-strings into C++ strings,
which cache the string length internally.

The match compiler has been adapted to collect all
C-strings during compilation and aggregate them.

Benchmark on the 'rpm' code base on a Core i7 920 box:

cppcheck without matchcompiler:
real    0m30.977s

cppcheck with previous matchcompiler:
real    0m28.157s

cppcheck with cached C-strings:
real    0m17.823s
2012-12-30 23:24:28 +01:00
Thomas Jarosch fe5ee76165 Match compiler: No need to handle %num% twice 2012-12-30 20:33:49 +01:00
Thomas Jarosch 3d0b4a9f7e Add execute permissions to matchcompiler.py on linux 2012-12-25 13:18:24 +01:00
Thomas Jarosch a2885a1759 Python 3 compatibility for the helper scripts
print() is a function in python 3.
Works with pyhton 2.x, too.
2012-12-25 13:12:58 +01:00
Daniel Marjamäki 3b3fe1c616 matchcompiler: throw InternalError if Token::Match is called with the varid 0 2012-12-19 06:45:05 +01:00
Daniel Marjamäki b6786c87b4 matchcompiler: handle %varid% 2012-12-14 16:59:37 +01:00
Daniel Marjamäki 2d8ed65d43 compiled Token::Match patterns: refactorings,improvements 2012-12-10 20:28:11 +01:00
Daniel Marjamäki a11ec4a5ee matchcompiler: replaced regular expression with simple code that parses the code better 2012-12-08 19:29:16 +01:00
Daniel Marjamäki 9fcfb38a1c matchcompiler: merged regular expressions to a single expression 2012-12-08 16:22:55 +01:00
Daniel Marjamäki bef0cf149b matchcompiler: reverted changes so the 'make test' works again 2012-12-08 07:41:18 +01:00
Daniel Marjamäki 9bd222970e matchcompiler: fixed hang. don't know why it hangs. 2012-12-04 23:38:49 +01:00
Daniel Marjamäki ae7846bf7e matchcompiler: added some selftests for findMatchPattern 2012-12-04 22:57:52 +01:00
Daniel Marjamäki ef5eece286 Compiled Token::Match patterns: extended match patterns and refactored the script a little 2012-12-02 13:39:59 +01:00
Daniel Marjamäki d630d34b62 Compiled Token::Match patterns. Added python script solution. Python is required to build with compiled patterns. To build cppcheck with compiled patterns use 'make LIBDIR=build'. 2012-12-02 12:36:55 +01:00