Error Gcov Stamp Mismatch With Graph File
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Cannot Open Graph File
community of 4.7 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up GCOV: why sample.gcda and sample.gcno may be different up vote 0 down vote favorite At gcov cannot open notes file first I take the message sample.gcda:stamp mismatch with graph file the order of compilation and running is observed hexdump -e '"%x\n"' -s8 -n4 sample.gcno -> aaa1aaaa hexdump -e '"%x\n"' -s8 -n4 sample.gcda -> bbb2bbbb gcov share|improve this question asked Apr 4 '14 at 10:42 usual_user 12 add a comment| 2 Answers 2 active oldest votes up vote 2 down vote stamp mismatch with graph file Means that graph file has been gcov cannot open source file compiled again after binaries built. If the compilation order is correct, you could try to check if there is a compilation of the sample.cpp twice somewhere in building rules. For example we have something like that: g++ ... sample.cpp -o sample g++ ... -shared sample.cpp -o sample2.o So one file is compiled twice. It will cause that gcno file will be updated by new timestamp that will not match to gcda file anymore. share|improve this answer edited Sep 29 '14 at 12:05 answered Sep 26 '14 at 14:08 valbok 313 add a comment| up vote 0 down vote If you performed your product or application testing thoroughly and manually and spent lot of effort on it. If your objective is to get code coverage report using lcov and gcov but by mistake deleted gcno files. You can regenerate gcno files by recompiling the code but it will be generated with new timestamp and gcov reports error saying "stamp mismatch with graph file" and no code coverage report will be generated. This will result in all your testing effort getting wasted. There is a shortcut to still generate the code coverage report. This is just a workaround and should not be relied upon all the time. Its recommended to preserve
[gcov] "stamp mismatch with graph file" From:
Gcov Cmake
"Verweij, Arjen"
Jackrabbit on Apache Tomcat Java Developer's Toolset Simple Test Runner Source Code Process Raspberry Pi Unix Home http://bobah.net/d4d/tools/code-coverage-with-gcov » Developer for Developers » Tools C++ code coverage profiling with GCC/GCOV Submitted by bobah on January 27, 2010 - 17:42 The coverage analysis with https://read01.com/2gj2GK.html GCC/GCOV includes three following steps instrumented application build — libraries, executable(s), and profiling artifacts (*.gcno files) are created the application test run(s) — the runtime coverage cannot open statistics (*.gcda files) is collected coverage statistics post-processing with GCOV/LCOV — text/HTML coverage reports are generated Instrumented application build To enable the instrumented compilation use GCC/G++ with --coveragee flag. The know-how here is to specify the full path to source files during the compilation in order to be able to perform a gcov cannot open cross-profiling and ease the use of LCOV (described below).
$ g++ -c -g -O0 --coverage -o $PWD/obj/myclass.o $PWD/myclass.cpp
$ g++ -c -g -O0 --coverage -o $PWD/obj/main.o $PWD/main.cpp
$ g++ -g -O0 --coverage -o $PWD/bin/myapp $PWD/obj/*.o
The GNU Make has two useful functions to convert filenames to absolute ones: $(abspath ...) and $(relpath ...) When compiling with --coverage flag, the *.gcno file is created in the same location, as the object file . This file is used by GCOV for post-processing application's statistics collected at runtime and contains profiling arcs information.
$ ls $PWD/obj
main.gcno main.o myclass.gcno myclass.o
$
Coverage statistics collection An instrumented application collects coverage statistics at runtime and creates a set of *.gcda files (or updates existing ones) on exit. For every *.gcno file created during the build a corresponding *.gcda file is created by the instrumented application upon exit.
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