Em Mon, Apr 27, 2020 at 02:15:16PM +0800, Nick Gasson escreveu: > For a Java method signature like: > > Ljava/lang/AbstractStringBuilder;appendChars(Ljava/lang/String;II)V > > The demangler produces: > > void class java.lang.AbstractStringBuilder.appendChars(class java.lang., > shorttring., int, int)
Cool, one more 'perf test' entry, thanks a lot! Applied, - Arnaldo > The arguments should be (java.lang.String, int, int) but the demangler > interprets the "S" in String as the type code for "short". Correct this > and two other minor things: > > - There is no "bool" type in Java, should be "boolean". > > - The demangler prepends "class" to every Java class name. This is not > standard Java syntax and it wastes a lot of horizontal space if the > signature is long. Remove this as there isn't any ambiguity between > class names and primitives. > > Also added a test case. > > Signed-off-by: Nick Gasson <[email protected]> > --- > tools/perf/tests/Build | 1 + > tools/perf/tests/builtin-test.c | 4 +++ > tools/perf/tests/demangle-java-test.c | 42 +++++++++++++++++++++++++++ > tools/perf/tests/tests.h | 1 + > tools/perf/util/demangle-java.c | 13 +++++---- > 5 files changed, 55 insertions(+), 6 deletions(-) > create mode 100644 tools/perf/tests/demangle-java-test.c > > diff --git a/tools/perf/tests/Build b/tools/perf/tests/Build > index 1692529639b0..2c45ac4a9581 100644 > --- a/tools/perf/tests/Build > +++ b/tools/perf/tests/Build > @@ -55,6 +55,7 @@ perf-y += mem2node.o > perf-y += maps.o > perf-y += time-utils-test.o > perf-y += genelf.o > +perf-y += demangle-java-test.o > > $(OUTPUT)tests/llvm-src-base.c: tests/bpf-script-example.c tests/Build > $(call rule_mkdir) > diff --git a/tools/perf/tests/builtin-test.c b/tools/perf/tests/builtin-test.c > index 54d9516c9839..03b362b37f97 100644 > --- a/tools/perf/tests/builtin-test.c > +++ b/tools/perf/tests/builtin-test.c > @@ -309,6 +309,10 @@ static struct test generic_tests[] = { > .desc = "maps__merge_in", > .func = test__maps__merge_in, > }, > + { > + .desc = "Demangle Java", > + .func = test__demangle_java, > + }, > { > .func = NULL, > }, > diff --git a/tools/perf/tests/demangle-java-test.c > b/tools/perf/tests/demangle-java-test.c > new file mode 100644 > index 000000000000..8f3b90832fb0 > --- /dev/null > +++ b/tools/perf/tests/demangle-java-test.c > @@ -0,0 +1,42 @@ > +// SPDX-License-Identifier: GPL-2.0 > +#include <string.h> > +#include <stdlib.h> > +#include <stdio.h> > +#include "tests.h" > +#include "session.h" > +#include "debug.h" > +#include "demangle-java.h" > + > +int test__demangle_java(struct test *test __maybe_unused, int subtest > __maybe_unused) > +{ > + int ret = TEST_OK; > + char *buf = NULL; > + size_t i; > + > + struct { > + const char *mangled, *demangled; > + } test_cases[] = { > + { "Ljava/lang/StringLatin1;equals([B[B)Z", > + "boolean java.lang.StringLatin1.equals(byte[], byte[])" }, > + { "Ljava/util/zip/ZipUtils;CENSIZ([BI)J", > + "long java.util.zip.ZipUtils.CENSIZ(byte[], int)" }, > + { > "Ljava/util/regex/Pattern$BmpCharProperty;match(Ljava/util/regex/Matcher;ILjava/lang/CharSequence;)Z", > + "boolean > java.util.regex.Pattern$BmpCharProperty.match(java.util.regex.Matcher, int, > java.lang.CharSequence)" }, > + { > "Ljava/lang/AbstractStringBuilder;appendChars(Ljava/lang/String;II)V", > + "void > java.lang.AbstractStringBuilder.appendChars(java.lang.String, int, int)" }, > + { "Ljava/lang/Object;<init>()V", > + "void java.lang.Object<init>()" }, > + }; > + > + for (i = 0; i < sizeof(test_cases) / sizeof(test_cases[0]); i++) { > + buf = java_demangle_sym(test_cases[i].mangled, 0); > + if (strcmp(buf, test_cases[i].demangled)) { > + pr_debug("FAILED: %s: %s != %s\n", > test_cases[i].mangled, > + buf, test_cases[i].demangled); > + ret = TEST_FAIL; > + } > + free(buf); > + } > + > + return ret; > +} > diff --git a/tools/perf/tests/tests.h b/tools/perf/tests/tests.h > index 9a160fef47c9..49b791d978f6 100644 > --- a/tools/perf/tests/tests.h > +++ b/tools/perf/tests/tests.h > @@ -111,6 +111,7 @@ int test__mem2node(struct test *t, int subtest); > int test__maps__merge_in(struct test *t, int subtest); > int test__time_utils(struct test *t, int subtest); > int test__jit_write_elf(struct test *test, int subtest); > +int test__demangle_java(struct test *test, int subtest); > > bool test__bp_signal_is_supported(void); > bool test__bp_account_is_supported(void); > diff --git a/tools/perf/util/demangle-java.c b/tools/perf/util/demangle-java.c > index 6fb7f34c0814..39c05200ed65 100644 > --- a/tools/perf/util/demangle-java.c > +++ b/tools/perf/util/demangle-java.c > @@ -15,7 +15,7 @@ enum { > MODE_CLASS = 1, > MODE_FUNC = 2, > MODE_TYPE = 3, > - MODE_CTYPE = 3, /* class arg */ > + MODE_CTYPE = 4, /* class arg */ > }; > > #define BASE_ENT(c, n) [c - 'A']=n > @@ -27,7 +27,7 @@ static const char *base_types['Z' - 'A' + 1] = { > BASE_ENT('I', "int" ), > BASE_ENT('J', "long" ), > BASE_ENT('S', "short" ), > - BASE_ENT('Z', "bool" ), > + BASE_ENT('Z', "boolean" ), > }; > > /* > @@ -59,15 +59,16 @@ __demangle_java_sym(const char *str, const char *end, > char *buf, int maxlen, int > > switch (*q) { > case 'L': > - if (mode == MODE_PREFIX || mode == MODE_CTYPE) { > - if (mode == MODE_CTYPE) { > + if (mode == MODE_PREFIX || mode == MODE_TYPE) { > + if (mode == MODE_TYPE) { > if (narg) > rlen += scnprintf(buf + rlen, > maxlen - rlen, ", "); > narg++; > } > - rlen += scnprintf(buf + rlen, maxlen - rlen, > "class "); > if (mode == MODE_PREFIX) > mode = MODE_CLASS; > + else > + mode = MODE_CTYPE; > } else > buf[rlen++] = *q; > break; > @@ -120,7 +121,7 @@ __demangle_java_sym(const char *str, const char *end, > char *buf, int maxlen, int > if (mode != MODE_CLASS && mode != MODE_CTYPE) > goto error; > /* safe because at least one other char to process */ > - if (isalpha(*(q + 1))) > + if (isalpha(*(q + 1)) && mode == MODE_CLASS) > rlen += scnprintf(buf + rlen, maxlen - rlen, > "."); > if (mode == MODE_CLASS) > mode = MODE_FUNC; > -- > 2.26.1 > -- - Arnaldo
