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([2602:ae:1598:4c01:3f85:a600:6a3e:e465]) by smtp.gmail.com with ESMTPSA id w20-20020a170902c79400b001a980a23802sm7018184pla.111.2023.06.05.13.19.33 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 05 Jun 2023 13:19:33 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Cc: Ilya Leoshkevich Subject: [PULL 51/52] accel/tcg: Unmap perf_marker Date: Mon, 5 Jun 2023 13:15:47 -0700 Message-Id: <20230605201548.1596865-52-richard.henderson@linaro.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230605201548.1596865-1-richard.henderson@linaro.org> References: <20230605201548.1596865-1-richard.henderson@linaro.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=2607:f8b0:4864:20::634; envelope-from=richard.henderson@linaro.org; helo=mail-pl1-x634.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org From: Ilya Leoshkevich Coverity complains that perf_marker is never unmapped. Fix by unmapping it in perf_exit(). Fixes: Coverity CID 1507929 Fixes: 5584e2dbe8c9 ("tcg: add perfmap and jitdump") Signed-off-by: Ilya Leoshkevich Message-Id: <20230605114134.1169974-1-iii@linux.ibm.com> Reviewed-by: Richard Henderson Signed-off-by: Richard Henderson --- accel/tcg/perf.c | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) diff --git a/accel/tcg/perf.c b/accel/tcg/perf.c index f5a1eda39f..cd1aa99a7e 100644 --- a/accel/tcg/perf.c +++ b/accel/tcg/perf.c @@ -111,6 +111,8 @@ static void write_perfmap_entry(const void *start, size_t insn, } static FILE *jitdump; +static size_t perf_marker_size; +static void *perf_marker = MAP_FAILED; #define JITHEADER_MAGIC 0x4A695444 #define JITHEADER_VERSION 1 @@ -190,7 +192,6 @@ void perf_enable_jitdump(void) { struct jitheader header; char jitdump_file[32]; - void *perf_marker; if (!use_rt_clock) { warn_report("CLOCK_MONOTONIC is not available, proceeding without jitdump"); @@ -210,7 +211,8 @@ void perf_enable_jitdump(void) * PERF_RECORD_MMAP or PERF_RECORD_MMAP2 event is of the form jit-%d.dump * and will process it as a jitdump file. */ - perf_marker = mmap(NULL, qemu_real_host_page_size(), PROT_READ | PROT_EXEC, + perf_marker_size = qemu_real_host_page_size(); + perf_marker = mmap(NULL, perf_marker_size, PROT_READ | PROT_EXEC, MAP_PRIVATE, fileno(jitdump), 0); if (perf_marker == MAP_FAILED) { warn_report("Could not map %s: %s, proceeding without jitdump", @@ -372,6 +374,11 @@ void perf_exit(void) perfmap = NULL; } + if (perf_marker != MAP_FAILED) { + munmap(perf_marker, perf_marker_size); + perf_marker = MAP_FAILED; + } + if (jitdump) { fclose(jitdump); jitdump = NULL; -- 2.34.1