Em Sun, Sep 13, 2020 at 11:02:51PM +0200, Jiri Olsa escreveu: > Factor filename__decompress from decompress_kmodule function. > It can decompress files with compressions supported in perf - > xz and gz, the support needs to be compiled in. > > It will to be used in following changes to get build id out of > compressed elf objects.
This is prep work, can be applied now, done. - Arnaldo > Signed-off-by: Jiri Olsa <jo...@kernel.org> > --- > tools/perf/util/dso.c | 31 +++++++++++++++++++------------ > tools/perf/util/dso.h | 2 ++ > 2 files changed, 21 insertions(+), 12 deletions(-) > > diff --git a/tools/perf/util/dso.c b/tools/perf/util/dso.c > index 5a3b4755f0b3..0faa96ca7a04 100644 > --- a/tools/perf/util/dso.c > +++ b/tools/perf/util/dso.c > @@ -279,18 +279,12 @@ bool dso__needs_decompress(struct dso *dso) > dso->symtab_type == DSO_BINARY_TYPE__GUEST_KMODULE_COMP; > } > > -static int decompress_kmodule(struct dso *dso, const char *name, > - char *pathname, size_t len) > +int filename__decompress(const char *name, char *pathname, > + size_t len, int comp, int *err) > { > char tmpbuf[] = KMOD_DECOMP_NAME; > int fd = -1; > > - if (!dso__needs_decompress(dso)) > - return -1; > - > - if (dso->comp == COMP_ID__NONE) > - return -1; > - > /* > * We have proper compression id for DSO and yet the file > * behind the 'name' can still be plain uncompressed object. > @@ -304,17 +298,17 @@ static int decompress_kmodule(struct dso *dso, const > char *name, > * To keep this transparent, we detect this and return the file > * descriptor to the uncompressed file. > */ > - if (!compressions[dso->comp].is_compressed(name)) > + if (!compressions[comp].is_compressed(name)) > return open(name, O_RDONLY); > > fd = mkstemp(tmpbuf); > if (fd < 0) { > - dso->load_errno = errno; > + *err = errno; > return -1; > } > > - if (compressions[dso->comp].decompress(name, fd)) { > - dso->load_errno = DSO_LOAD_ERRNO__DECOMPRESSION_FAILURE; > + if (compressions[comp].decompress(name, fd)) { > + *err = DSO_LOAD_ERRNO__DECOMPRESSION_FAILURE; > close(fd); > fd = -1; > } > @@ -328,6 +322,19 @@ static int decompress_kmodule(struct dso *dso, const > char *name, > return fd; > } > > +static int decompress_kmodule(struct dso *dso, const char *name, > + char *pathname, size_t len) > +{ > + if (!dso__needs_decompress(dso)) > + return -1; > + > + if (dso->comp == COMP_ID__NONE) > + return -1; > + > + return filename__decompress(name, pathname, len, dso->comp, > + &dso->load_errno); > +} > + > int dso__decompress_kmodule_fd(struct dso *dso, const char *name) > { > return decompress_kmodule(dso, name, NULL, 0); > diff --git a/tools/perf/util/dso.h b/tools/perf/util/dso.h > index 8ad17f395a19..f1efd2e11547 100644 > --- a/tools/perf/util/dso.h > +++ b/tools/perf/util/dso.h > @@ -274,6 +274,8 @@ bool dso__needs_decompress(struct dso *dso); > int dso__decompress_kmodule_fd(struct dso *dso, const char *name); > int dso__decompress_kmodule_path(struct dso *dso, const char *name, > char *pathname, size_t len); > +int filename__decompress(const char *name, char *pathname, > + size_t len, int comp, int *err); > > #define KMOD_DECOMP_NAME "/tmp/perf-kmod-XXXXXX" > #define KMOD_DECOMP_LEN sizeof(KMOD_DECOMP_NAME) > -- > 2.26.2 > -- - Arnaldo