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AddressSanitizer (or ASan) and UndefinedBehaviorSanitizer (or UBSan) are very useful tools to detect program bugs: - AddressSanitizer (or ASan) is a GCC feature that detects memory corruption bugs such as buffer overflows and memory leaks. - UndefinedBehaviorSanitizer (or UBSan) is a fast undefined behavior detector supported by GCC. UBSan detects undefined behaviors of programs at runtime. This patch adds a document about how to use them on perf. Later patches will fix some of the issues disclosed by them. Signed-off-by: Changbin Du <changbin.du@gmail.com> Reviewed-by: Jiri Olsa <jolsa@kernel.org> Cc: Alexei Starovoitov <ast@kernel.org> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Steven Rostedt (VMware) <rostedt@goodmis.org> Link: http://lkml.kernel.org/r/20190316080556.3075-2-changbin.du@gmail.com [ Make some changes based on comments made by Jiri Olsa ] Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
74 lines
2.1 KiB
Plaintext
74 lines
2.1 KiB
Plaintext
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1) perf build
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=============
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The perf build process consists of several separated building blocks,
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which are linked together to form the perf binary:
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- libperf library (static)
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- perf builtin commands
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- traceevent library (static)
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- GTK ui library
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Several makefiles govern the perf build:
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- Makefile
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top level Makefile working as a wrapper that calls the main
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Makefile.perf with a -j option to do parallel builds.
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- Makefile.perf
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main makefile that triggers build of all perf objects including
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installation and documentation processing.
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- tools/build/Makefile.build
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main makefile of the build framework
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- tools/build/Build.include
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build framework generic definitions
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- Build makefiles
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makefiles that defines build objects
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Please refer to tools/build/Documentation/Build.txt for more
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information about build framework.
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2) perf build
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=============
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The Makefile.perf triggers the build framework for build objects:
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perf, libperf, gtk
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resulting in following objects:
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$ ls *-in.o
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gtk-in.o libperf-in.o perf-in.o
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Those objects are then used in final linking:
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libperf-gtk.so <- gtk-in.o libperf-in.o
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perf <- perf-in.o libperf-in.o
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NOTE this description is omitting other libraries involved, only
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focusing on build framework outcomes
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3) Build with ASan or UBSan
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==========================
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$ cd tools/perf
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$ make DESTDIR=/usr
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$ make DESTDIR=/usr install
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AddressSanitizer (or ASan) is a GCC feature that detects memory corruption bugs
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such as buffer overflows and memory leaks.
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$ cd tools/perf
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$ make DEBUG=1 EXTRA_CFLAGS='-fno-omit-frame-pointer -fsanitize=address'
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$ ASAN_OPTIONS=log_path=asan.log ./perf record -a
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ASan outputs all detected issues into a log file named 'asan.log.<pid>'.
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UndefinedBehaviorSanitizer (or UBSan) is a fast undefined behavior detector
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supported by GCC. UBSan detects undefined behaviors of programs at runtime.
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$ cd tools/perf
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$ make DEBUG=1 EXTRA_CFLAGS='-fno-omit-frame-pointer -fsanitize=undefined'
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$ UBSAN_OPTIONS=print_stacktrace=1 ./perf record -a
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If UBSan detects any problem at runtime, it outputs a “runtime error:” message.
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