[PATCH v1 0/5] Support dynamic opening of capstone and libLLVM
From: Ian Rogers
Date: Mon Jan 20 2025 - 12:32:32 EST
Linking against libcapstone and libLLVM can be a significant increase
in dependencies and size of memory footprint. For something like `perf
record` the disassembler and addr2line functionality won't be
used. Support dynamically loading these libraries using dlopen and
then calling the appropriate functions found using dlsym.
The patch series:
1) moves the capstone and LLVM code to their own C files,
2) simplifies a little the capstone code,
3) adds perf_ variants of the functions that will either directly call
the function or use dlsym to discover it.
The addr2line LLVM functionality is written in C++. To avoid linking
against libLLVM for this, a new LIBLLVM_DYNAMIC option is added where
the C++ code with the libLLVM dependency will be built into a
libperf-llvm.so and that dlsym-ed and called against.
Ian Rogers (5):
perf capstone: Move capstone functionality into its own file
perf llvm: Move llvm functionality into its own file
perf capstone: Remove open_capstone_handle
perf capstone: Support for dlopen-ing libcapstone.so
perf llvm: Support for dlopen-ing libLLVM.so
tools/perf/Makefile.config | 13 +
tools/perf/Makefile.perf | 23 +-
tools/perf/builtin-script.c | 2 -
tools/perf/tests/make | 2 +
tools/perf/util/Build | 4 +-
tools/perf/util/capstone.c | 723 +++++++++++++++++++++++++++++
tools/perf/util/capstone.h | 24 +
tools/perf/util/disasm.c | 612 +-----------------------
tools/perf/util/disasm.h | 2 +
tools/perf/util/llvm-c-helpers.cpp | 113 ++++-
tools/perf/util/llvm.c | 537 +++++++++++++++++++++
tools/perf/util/llvm.h | 24 +
tools/perf/util/print_insn.c | 117 +----
tools/perf/util/srcline.c | 65 +--
tools/perf/util/srcline.h | 6 +
15 files changed, 1481 insertions(+), 786 deletions(-)
create mode 100644 tools/perf/util/capstone.c
create mode 100644 tools/perf/util/capstone.h
create mode 100644 tools/perf/util/llvm.c
create mode 100644 tools/perf/util/llvm.h
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2.48.0.rc2.279.g1de40edade-goog