diff options
Diffstat (limited to 'accel/tcg/perf.c')
| -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 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; |