forked from Minki/linux
cae15db749
Rust demangling is another step after bfd demangling. Add a diagnosis to
identify mangled Rust symbols based on the hash that the Rust mangler appends
as the last path component, as well as other characteristics. Add a demangler
to reconstruct the original symbol.
Committer notes:
How I tested it:
Enabled COPR on Fedora 24 and then installed the 'rust-binary' package,
with it:
$ cat src/main.rs
fn main() {
println!("Hello, world!");
}
$ cat Cargo.toml
[package]
name = "hello_world"
version = "0.0.1"
authors = [ "Arnaldo Carvalho de Melo <acme@kernel.org>" ]
$ perf record cargo bench
Compiling hello_world v0.0.1 (file:///home/acme/projects/hello_world)
Running target/release/hello_world-d4b9dab4b2a47d75
running 0 tests
test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.096 MB perf.data (1457 samples) ]
$
Before this patch:
$ perf report --stdio --dsos librbml-e8edd0fd.so
# dso: librbml-e8edd0fd.so
#
# Total Lost Samples: 0
#
# Samples: 1K of event 'cycles:u'
# Event count (approx.): 979599126
#
# Overhead Command Symbol
# ........ ....... .............................................................................................................
#
1.78% rustc [.] rbml::reader::maybe_get_doc::hb9d387df6024b15b
1.50% rustc [.] _$LT$reader..DocsIterator$LT$$u27$a$GT$$u20$as$u20$std..iter..Iterator$GT$::next::hd9af9e60d79a35c8
1.20% rustc [.] rbml::reader::doc_at::hc88107fba445af31
0.46% rustc [.] _$LT$reader..TaggedDocsIterator$LT$$u27$a$GT$$u20$as$u20$std..iter..Iterator$GT$::next::h0cb40e696e4bb489
0.35% rustc [.] rbml::reader::Decoder::_next_int::h66eef7825a398bc3
0.29% rustc [.] rbml::reader::Decoder::_next_sub::h8e5266005580b836
0.15% rustc [.] rbml::reader::get_doc::h094521c645459139
0.14% rustc [.] _$LT$reader..Decoder$LT$$u27$doc$GT$$u20$as$u20$serialize..Decoder$GT$::read_u32::h0acea2fff9669327
0.07% rustc [.] rbml::reader::Decoder::next_doc::h6714d469c9dfaf91
0.07% rustc [.] _ZN4rbml6reader10doc_as_u6417h930b740aa94f1d3aE@plt
0.06% rustc [.] _fini
$
After:
$ perf report --stdio --dsos librbml-e8edd0fd.so
# dso: librbml-e8edd0fd.so
#
# Total Lost Samples: 0
#
# Samples: 1K of event 'cycles:u'
# Event count (approx.): 979599126
#
# Overhead Command Symbol
# ........ ....... .................................................................
#
1.78% rustc [.] rbml::reader::maybe_get_doc
1.50% rustc [.] <reader::DocsIterator<'a> as std::iter::Iterator>::next
1.20% rustc [.] rbml::reader::doc_at
0.46% rustc [.] <reader::TaggedDocsIterator<'a> as std::iter::Iterator>::next
0.35% rustc [.] rbml::reader::Decoder::_next_int
0.29% rustc [.] rbml::reader::Decoder::_next_sub
0.15% rustc [.] rbml::reader::get_doc
0.14% rustc [.] <reader::Decoder<'doc> as serialize::Decoder>::read_u32
0.07% rustc [.] rbml::reader::Decoder::next_doc
0.07% rustc [.] _ZN4rbml6reader10doc_as_u6417h930b740aa94f1d3aE@plt
0.06% rustc [.] _fini
$
Signed-off-by: David Tolnay <dtolnay@gmail.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/5780B7FA.3030602@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
190 lines
5.7 KiB
Plaintext
190 lines
5.7 KiB
Plaintext
libperf-y += alias.o
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libperf-y += annotate.o
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libperf-y += build-id.o
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libperf-y += config.o
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libperf-y += ctype.o
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libperf-y += db-export.o
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libperf-y += env.o
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libperf-y += event.o
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libperf-y += evlist.o
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libperf-y += evsel.o
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libperf-y += evsel_fprintf.o
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libperf-y += find_bit.o
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libperf-y += kallsyms.o
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libperf-y += levenshtein.o
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libperf-y += llvm-utils.o
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libperf-y += parse-events.o
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libperf-y += perf_regs.o
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libperf-y += path.o
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libperf-y += rbtree.o
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libperf-y += libstring.o
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libperf-y += bitmap.o
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libperf-y += hweight.o
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libperf-y += quote.o
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libperf-y += strbuf.o
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libperf-y += string.o
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libperf-y += strlist.o
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libperf-y += strfilter.o
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libperf-y += top.o
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libperf-y += usage.o
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libperf-y += dso.o
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libperf-y += symbol.o
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libperf-y += symbol_fprintf.o
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libperf-y += color.o
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libperf-y += header.o
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libperf-y += callchain.o
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libperf-y += values.o
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libperf-y += debug.o
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libperf-y += machine.o
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libperf-y += map.o
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libperf-y += pstack.o
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libperf-y += session.o
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libperf-$(CONFIG_AUDIT) += syscalltbl.o
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libperf-y += ordered-events.o
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libperf-y += comm.o
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libperf-y += thread.o
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libperf-y += thread_map.o
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libperf-y += trace-event-parse.o
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libperf-y += parse-events-flex.o
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libperf-y += parse-events-bison.o
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libperf-y += pmu.o
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libperf-y += pmu-flex.o
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libperf-y += pmu-bison.o
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libperf-y += trace-event-read.o
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libperf-y += trace-event-info.o
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libperf-y += trace-event-scripting.o
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libperf-y += trace-event.o
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libperf-y += svghelper.o
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libperf-y += sort.o
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libperf-y += hist.o
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libperf-y += util.o
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libperf-y += xyarray.o
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libperf-y += cpumap.o
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libperf-y += cgroup.o
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libperf-y += target.o
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libperf-y += rblist.o
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libperf-y += intlist.o
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libperf-y += vdso.o
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libperf-y += counts.o
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libperf-y += stat.o
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libperf-y += stat-shadow.o
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libperf-y += record.o
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libperf-y += srcline.o
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libperf-y += str_error_r.o
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libperf-y += data.o
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libperf-y += tsc.o
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libperf-y += cloexec.o
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libperf-y += call-path.o
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libperf-y += thread-stack.o
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libperf-$(CONFIG_AUXTRACE) += auxtrace.o
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libperf-$(CONFIG_AUXTRACE) += intel-pt-decoder/
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libperf-$(CONFIG_AUXTRACE) += intel-pt.o
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libperf-$(CONFIG_AUXTRACE) += intel-bts.o
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libperf-y += parse-branch-options.o
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libperf-y += parse-regs-options.o
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libperf-y += term.o
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libperf-y += help-unknown-cmd.o
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libperf-y += mem-events.o
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libperf-y += vsprintf.o
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libperf-$(CONFIG_LIBBPF) += bpf-loader.o
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libperf-$(CONFIG_BPF_PROLOGUE) += bpf-prologue.o
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libperf-$(CONFIG_LIBELF) += symbol-elf.o
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libperf-$(CONFIG_LIBELF) += probe-file.o
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libperf-$(CONFIG_LIBELF) += probe-event.o
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ifndef CONFIG_LIBELF
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libperf-y += symbol-minimal.o
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endif
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libperf-$(CONFIG_DWARF) += probe-finder.o
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libperf-$(CONFIG_DWARF) += dwarf-aux.o
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libperf-$(CONFIG_LIBDW_DWARF_UNWIND) += unwind-libdw.o
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libperf-$(CONFIG_LOCAL_LIBUNWIND) += unwind-libunwind-local.o
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libperf-$(CONFIG_LIBUNWIND) += unwind-libunwind.o
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libperf-$(CONFIG_LIBUNWIND_X86) += libunwind/x86_32.o
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libperf-$(CONFIG_LIBUNWIND_AARCH64) += libunwind/arm64.o
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libperf-$(CONFIG_LIBBABELTRACE) += data-convert-bt.o
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libperf-y += scripting-engines/
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libperf-$(CONFIG_ZLIB) += zlib.o
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libperf-$(CONFIG_LZMA) += lzma.o
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libperf-y += demangle-java.o
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libperf-y += demangle-rust.o
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ifdef CONFIG_JITDUMP
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libperf-$(CONFIG_LIBELF) += jitdump.o
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libperf-$(CONFIG_LIBELF) += genelf.o
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libperf-$(CONFIG_LIBELF) += genelf_debug.o
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endif
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CFLAGS_config.o += -DETC_PERFCONFIG="BUILD_STR($(ETC_PERFCONFIG_SQ))"
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# avoid compiler warnings in 32-bit mode
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CFLAGS_genelf_debug.o += -Wno-packed
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$(OUTPUT)util/parse-events-flex.c: util/parse-events.l $(OUTPUT)util/parse-events-bison.c
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$(call rule_mkdir)
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$(Q)$(call echo-cmd,flex)$(FLEX) -o $@ --header-file=$(OUTPUT)util/parse-events-flex.h $(PARSER_DEBUG_FLEX) util/parse-events.l
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$(OUTPUT)util/parse-events-bison.c: util/parse-events.y
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$(call rule_mkdir)
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$(Q)$(call echo-cmd,bison)$(BISON) -v util/parse-events.y -d $(PARSER_DEBUG_BISON) -o $@ -p parse_events_
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$(OUTPUT)util/pmu-flex.c: util/pmu.l $(OUTPUT)util/pmu-bison.c
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$(call rule_mkdir)
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$(Q)$(call echo-cmd,flex)$(FLEX) -o $@ --header-file=$(OUTPUT)util/pmu-flex.h util/pmu.l
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$(OUTPUT)util/pmu-bison.c: util/pmu.y
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$(call rule_mkdir)
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$(Q)$(call echo-cmd,bison)$(BISON) -v util/pmu.y -d -o $@ -p perf_pmu_
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CFLAGS_parse-events-flex.o += -w
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CFLAGS_pmu-flex.o += -w
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CFLAGS_parse-events-bison.o += -DYYENABLE_NLS=0 -w
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CFLAGS_pmu-bison.o += -DYYENABLE_NLS=0 -DYYLTYPE_IS_TRIVIAL=0 -w
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$(OUTPUT)util/parse-events.o: $(OUTPUT)util/parse-events-flex.c $(OUTPUT)util/parse-events-bison.c
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$(OUTPUT)util/pmu.o: $(OUTPUT)util/pmu-flex.c $(OUTPUT)util/pmu-bison.c
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CFLAGS_bitmap.o += -Wno-unused-parameter -DETC_PERFCONFIG="BUILD_STR($(ETC_PERFCONFIG_SQ))"
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CFLAGS_find_bit.o += -Wno-unused-parameter -DETC_PERFCONFIG="BUILD_STR($(ETC_PERFCONFIG_SQ))"
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CFLAGS_rbtree.o += -Wno-unused-parameter -DETC_PERFCONFIG="BUILD_STR($(ETC_PERFCONFIG_SQ))"
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CFLAGS_libstring.o += -Wno-unused-parameter -DETC_PERFCONFIG="BUILD_STR($(ETC_PERFCONFIG_SQ))"
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CFLAGS_hweight.o += -Wno-unused-parameter -DETC_PERFCONFIG="BUILD_STR($(ETC_PERFCONFIG_SQ))"
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CFLAGS_parse-events.o += -Wno-redundant-decls
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$(OUTPUT)util/kallsyms.o: ../lib/symbol/kallsyms.c FORCE
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$(call rule_mkdir)
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$(call if_changed_dep,cc_o_c)
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$(OUTPUT)util/bitmap.o: ../lib/bitmap.c FORCE
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$(call rule_mkdir)
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$(call if_changed_dep,cc_o_c)
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$(OUTPUT)util/find_bit.o: ../lib/find_bit.c FORCE
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$(call rule_mkdir)
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$(call if_changed_dep,cc_o_c)
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$(OUTPUT)util/rbtree.o: ../lib/rbtree.c FORCE
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$(call rule_mkdir)
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$(call if_changed_dep,cc_o_c)
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$(OUTPUT)util/libstring.o: ../lib/string.c FORCE
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$(call rule_mkdir)
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$(call if_changed_dep,cc_o_c)
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$(OUTPUT)util/str_error_r.o: ../lib/str_error_r.c FORCE
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$(call rule_mkdir)
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$(call if_changed_dep,cc_o_c)
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$(OUTPUT)util/hweight.o: ../lib/hweight.c FORCE
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$(call rule_mkdir)
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$(call if_changed_dep,cc_o_c)
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$(OUTPUT)util/vsprintf.o: ../lib/vsprintf.c FORCE
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$(call rule_mkdir)
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$(call if_changed_dep,cc_o_c)
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