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| author | Chris Phlipot <cphlipot0@gmail.com> | 2016-05-11 05:26:46 +0200 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2016-05-11 17:24:57 +0200 |
| commit | ae93a6c70838b87151ac12589dc507dbf4f2f067 (patch) | |
| tree | 5cc36ec19cb956eecdc84087ffc14a43262c9c63 /tools/perf/util/symbol.c | |
| parent | perf scripting python: Use Py_FatalError instead of die() (diff) | |
| download | linux-ae93a6c70838b87151ac12589dc507dbf4f2f067.tar.xz linux-ae93a6c70838b87151ac12589dc507dbf4f2f067.zip | |
perf symbols: Add dso__insert_symbol function
The current method for inserting symbols is to use the symbols__insert()
function. However symbols__insert() does not update the dso symbol
cache. This causes problems in the following scenario:
1. symbol not found at addr using dso__find_symbol
2. symbol inserted at addr using the existing symbols__insert function
3. symbol still not found at addr using dso__find_symbol() because cache isn't
updated. This is undesired behavior.
The undesired behavior in (3) is addressed by creating a new function,
dso__insert_symbol() to both insert the symbol and update the symbol
cache if necessary.
If dso__insert_symbol() is used in (2) instead of symbols__insert(),
then the undesired behavior in (3) is avoided.
Signed-off-by: Chris Phlipot <cphlipot0@gmail.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1462937209-6032-2-git-send-email-cphlipot0@gmail.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/util/symbol.c')
| -rw-r--r-- | tools/perf/util/symbol.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c index 2946295ca502..21af8e8891fe 100644 --- a/tools/perf/util/symbol.c +++ b/tools/perf/util/symbol.c @@ -413,6 +413,18 @@ void dso__reset_find_symbol_cache(struct dso *dso) } } +void dso__insert_symbol(struct dso *dso, enum map_type type, struct symbol *sym) +{ + symbols__insert(&dso->symbols[type], sym); + + /* update the symbol cache if necessary */ + if (dso->last_find_result[type].addr >= sym->start && + (dso->last_find_result[type].addr < sym->end || + sym->start == sym->end)) { + dso->last_find_result[type].symbol = sym; + } +} + struct symbol *dso__find_symbol(struct dso *dso, enum map_type type, u64 addr) { |