[PATCH v3 00/18] clang-tools support in tools

From: Ian Rogers
Date: Mon Oct 09 2023 - 14:39:31 EST


Allow the clang-tools scripts to work with builds in tools such as
tools/perf and tools/lib/perf. An example use looks like:

```
$ cd tools/perf
$ make CC=clang CXX=clang++
$ ../../scripts/clang-tools/gen_compile_commands.py
$ ../../scripts/clang-tools/run-clang-tools.py clang-tidy compile_commands.json -checks=-*,readability-named-parameter
Skipping non-C file: 'tools/perf/bench/mem-memcpy-x86-64-asm.S'
Skipping non-C file: 'tools/perf/bench/mem-memset-x86-64-asm.S'
Skipping non-C file: 'tools/perf/arch/x86/tests/regs_load.S'
8 warnings generated.
Suppressed 8 warnings (8 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
2 warnings generated.
4 warnings generated.
Suppressed 4 warnings (4 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
2 warnings generated.
4 warnings generated.
Suppressed 4 warnings (4 in non-user code).
Use -header-filter=.* to display errors from all non-system headers. Use -system-headers to display errors from system headers as well.
3 warnings generated.
tools/perf/util/parse-events-flex.c:546:27: warning: all parameters should be named in a function [readability-named-parameter]
void *yyalloc ( yy_size_t , yyscan_t yyscanner );
^
/*size*/
...
```

Fix a number of the more serious low-hanging issues in perf found by
clang-tidy.

This support isn't complete, in particular it doesn't support output
directories properly and so fails for tools/lib/bpf, tools/bpf/bpftool
and if an output directory is used.

v3. Add Nick Desaulniers reviewed-by to patch 3. For Namhyung, drop
"perf hisi-ptt: Fix potential memory leak", split lock change out
of "perf svghelper: Avoid memory leak" and address comments in
"perf header: Fix various error path memory leaks".
v2: Address comments by Nick Desaulniers in patch 3, and add their
Reviewed-by to patches 1 and 2.

Ian Rogers (18):
gen_compile_commands: Allow the line prefix to still be cmd_
gen_compile_commands: Sort output compile commands by file name
run-clang-tools: Add pass through checks and header-filter arguments
perf bench uprobe: Fix potential use of memory after free
perf buildid-cache: Fix use of uninitialized value
perf env: Remove unnecessary NULL tests
perf jitdump: Avoid memory leak
perf mem-events: Avoid uninitialized read
perf dlfilter: Be defensive against potential NULL dereference
perf hists browser: Reorder variables to reduce padding
perf hists browser: Avoid potential NULL dereference
perf svghelper: Avoid memory leak
perf lock: Fix a memory leak on an error path
perf parse-events: Fix unlikely memory leak when cloning terms
tools api: Avoid potential double free
perf trace-event-info: Avoid passing NULL value to closedir
perf header: Fix various error path memory leaks
perf bpf_counter: Fix a few memory leaks

scripts/clang-tools/gen_compile_commands.py | 8 +--
scripts/clang-tools/run-clang-tools.py | 32 ++++++++---
tools/lib/api/io.h | 1 +
tools/perf/bench/uprobe.c | 1 +
tools/perf/builtin-buildid-cache.c | 6 ++-
tools/perf/builtin-lock.c | 1 +
tools/perf/ui/browsers/hists.c | 6 +--
tools/perf/util/bpf_counter.c | 5 +-
tools/perf/util/dlfilter.c | 4 +-
tools/perf/util/env.c | 6 +--
tools/perf/util/header.c | 60 ++++++++++++---------
tools/perf/util/jitdump.c | 1 +
tools/perf/util/mem-events.c | 3 +-
tools/perf/util/parse-events.c | 4 +-
tools/perf/util/svghelper.c | 5 +-
tools/perf/util/trace-event-info.c | 3 +-
16 files changed, 94 insertions(+), 52 deletions(-)

--
2.42.0.609.gbb76f46606-goog