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c9602aa046
Rather than allocate memory, allow abi::__cxa_demangle to do
that. This avoids a problem where on error NULL was returned
triggering a memory leak.
Fixes: 3b4e4efe88 ("perf symbol: Add abi::__cxa_demangle C++ demangling support")
Signed-off-by: Ian Rogers <irogers@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexey Bayduraev <alexey.v.bayduraev@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: André Almeida <andrealmeid@collabora.com>
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Darren Hart <dvhart@infradead.org>
Cc: Davidlohr Bueso <dave@stgolabs.net>
Cc: Dmitriy Vyukov <dvyukov@google.com>
Cc: Eric Dumazet <edumazet@google.com>
Cc: German Gomez <german.gomez@arm.com>
Cc: Hao Luo <haoluo@google.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Clark <james.clark@arm.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Garry <john.g.garry@oracle.com>
Cc: Kajol Jain <kjain@linux.ibm.com>
Cc: Kan Liang <kan.liang@linux.intel.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Madhavan Srinivasan <maddy@linux.ibm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Miaoqian Lin <linmq006@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Riccardo Mancini <rickyman7@gmail.com>
Cc: Shunsuke Nakamura <nakamura.shun@fujitsu.com>
Cc: Song Liu <song@kernel.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Stephen Brennan <stephen.s.brennan@oracle.com>
Cc: Steven Rostedt (VMware) <rostedt@goodmis.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Thomas Richter <tmricht@linux.ibm.com>
Cc: Yury Norov <yury.norov@gmail.com>
Link: https://lore.kernel.org/r/20230320033810.980165-2-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
50 lines
1.3 KiB
C++
50 lines
1.3 KiB
C++
// SPDX-License-Identifier: GPL-2.0
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#include "demangle-cxx.h"
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#include <stdlib.h>
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#include <string.h>
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#include <linux/compiler.h>
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#ifdef HAVE_LIBBFD_SUPPORT
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#define PACKAGE 'perf'
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#include <bfd.h>
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#endif
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#ifdef HAVE_CXA_DEMANGLE_SUPPORT
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#include <cxxabi.h>
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#endif
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#if defined(HAVE_LIBBFD_SUPPORT) || defined(HAVE_CPLUS_DEMANGLE_SUPPORT)
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#ifndef DMGL_PARAMS
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#define DMGL_PARAMS (1 << 0) /* Include function args */
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#define DMGL_ANSI (1 << 1) /* Include const, volatile, etc */
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#endif
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#endif
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/*
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* Demangle C++ function signature
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*
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* Note: caller is responsible for freeing demangled string
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*/
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extern "C"
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char *cxx_demangle_sym(const char *str, bool params __maybe_unused,
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bool modifiers __maybe_unused)
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{
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#ifdef HAVE_LIBBFD_SUPPORT
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int flags = (params ? DMGL_PARAMS : 0) | (modifiers ? DMGL_ANSI : 0);
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return bfd_demangle(NULL, str, flags);
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#elif defined(HAVE_CPLUS_DEMANGLE_SUPPORT)
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int flags = (params ? DMGL_PARAMS : 0) | (modifiers ? DMGL_ANSI : 0);
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return cplus_demangle(str, flags);
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#elif defined(HAVE_CXA_DEMANGLE_SUPPORT)
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char *output;
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int status;
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output = abi::__cxa_demangle(str, /*output_buffer=*/NULL, /*length=*/NULL, &status);
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return output;
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#else
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return NULL;
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#endif
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}
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