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From 0246c6ba4a08378c46c17617d831d6baf0f44989 Mon Sep 17 00:00:00 2001
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From: William Cohen <wcohen@redhat.com>
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Date: Fri, 9 Jan 2015 16:44:09 -0500
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Subject: [PATCH] Allow operf to track anon_hugepage mmap entries
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The perf mmap information for anon_huge pages has a different filename
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("/anon_hugepage") than the mmap information for regions composed of
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normal sized pages ("//anon"). This results in opreport not being
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able to map samples collected by operf to Java methods when the Java
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VM uses statically allocated huge pages (rhbz1180512 and rhbz1180513).
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Signed-off-by: William Cohen <wcohen@redhat.com>
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---
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libperf_events/operf_utils.cpp | 4 ++++
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1 file changed, 4 insertions(+)
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diff --git a/libperf_events/operf_utils.cpp b/libperf_events/operf_utils.cpp
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index a87524b..90a0765 100644
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--- a/libperf_events/operf_utils.cpp
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+++ b/libperf_events/operf_utils.cpp
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@@ -295,6 +295,10 @@ static void __handle_mmap_event(event_t * event)
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strlen("//anon")) == 0)) {
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mapping->is_anon_mapping = true;
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strcpy(mapping->filename, "anon");
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+ } else if ((strncmp(mapping->filename, "/anon_hugepage",
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+ strlen("/anon_hugepage")) == 0)) {
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+ mapping->is_anon_mapping = true;
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+ strcpy(mapping->filename, "anon");
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}
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mapping->end_addr = (event->mmap.len == 0ULL)? 0ULL : mapping->start_addr + event->mmap.len - 1;
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mapping->pgoff = event->mmap.pgoff;
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--
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2.1.0
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