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| author | Ilya Leoshkevich <iii@linux.ibm.com> | 2023-06-05 13:41:34 +0200 |
|---|---|---|
| committer | Richard Henderson <richard.henderson@linaro.org> | 2023-06-05 12:06:49 -0700 |
| commit | e7cd7a3916ac50378479b773057100683414eec4 (patch) | |
| tree | d7d2f21d459f71e5e155601373c21fec15297361 /accel/tcg | |
| parent | 514fea9eaf2136ba16e3d8ec38d156f89698ebd7 (diff) | |
| download | qemu-e7cd7a3916ac50378479b773057100683414eec4.zip qemu-e7cd7a3916ac50378479b773057100683414eec4.tar.gz qemu-e7cd7a3916ac50378479b773057100683414eec4.tar.bz2 | |
accel/tcg: Unmap perf_marker
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 <iii@linux.ibm.com>
Message-Id: <20230605114134.1169974-1-iii@linux.ibm.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Diffstat (limited to 'accel/tcg')
| -rw-r--r-- | accel/tcg/perf.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/accel/tcg/perf.c b/accel/tcg/perf.c index f5a1eda..cd1aa99 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; |