simpleperf: report: add an option to specify symbol searching directory

Allow user to specify a directory containing symbols instead of needing
a directory structure matching the dso path. This is useful for
specifying symbols for dynamic libraries included in APKs such as
libmonochrome_x64.so for chromium.

Bug: none
Test: `simpleperf report --lib DIR_WITH_SYMBOLS ...`
      `simpleperf_unit_test`
Change-Id: Ifb1bef62899cfbe25594d1de4cf2f17574706926

2 files changed, 26 insertions, 5 deletions

diff --git a/simpleperf/cmd_report.cpp b/simpleperf/cmd_report.cpp
index 524174e4..f2fb527f 100644
--- a/simpleperf/cmd_report.cpp
+++ b/simpleperf/cmd_report.cpp
@@ -449,6 +449,7 @@ class ReportCommand : public Command {
 "                      The default sort keys are:\n"
 "                        comm,pid,tid,dso,symbol\n"
 "--symfs <dir>         Look for files with symbols relative to this directory.\n"
+"--symdir <dir>        Look for files with symbols in a directory recursively.\n"
 "--vmlinux <file>      Parse kernel symbols from <file>.\n"
 "\n"
 "Sample filter options:\n"
@@ -585,6 +586,7 @@ bool ReportCommand::ParseOptions(const std::vector<std::string>& args) {
       {"--sort", {OptionValueType::STRING, OptionType::SINGLE}},
       {"--symbols", {OptionValueType::STRING, OptionType::MULTIPLE}},
       {"--symfs", {OptionValueType::STRING, OptionType::SINGLE}},
+      {"--symdir", {OptionValueType::STRING, OptionType::SINGLE}},
       {"--vmlinux", {OptionValueType::STRING, OptionType::SINGLE}},
   };
   OptionFormatMap record_filter_options = GetRecordFilterOptionFormats(false);
@@ -692,6 +694,11 @@ bool ReportCommand::ParseOptions(const std::vector<std::string>& args) {
       return false;
     }
   }
+  if (auto value = options.PullValue("--symdir"); value) {
+    if (!Dso::AddSymbolDir(*value->str_value)) {
+      return false;
+    }
+  }
   if (auto value = options.PullValue("--vmlinux"); value) {
     Dso::SetVmlinux(*value->str_value);
   }
diff --git a/simpleperf/cmd_report_test.cpp b/simpleperf/cmd_report_test.cpp
index 6dfbae5c..fcb9fac4 100644
--- a/simpleperf/cmd_report_test.cpp
+++ b/simpleperf/cmd_report_test.cpp
@@ -40,16 +40,23 @@ static std::unique_ptr<Command> ReportCmd() {
 class ReportCommandTest : public ::testing::Test {
  protected:
   void Report(const std::string& perf_data,
-              const std::vector<std::string>& add_args = std::vector<std::string>()) {
-    ReportRaw(GetTestData(perf_data), add_args);
+              const std::vector<std::string>& add_args = std::vector<std::string>(),
+              bool with_symfs = true) {
+    ReportRaw(GetTestData(perf_data), add_args, with_symfs);
   }
 
   void ReportRaw(const std::string& perf_data,
-                 const std::vector<std::string>& add_args = std::vector<std::string>()) {
+                 const std::vector<std::string>& add_args = std::vector<std::string>(),
+                 bool with_symfs = true) {
     success = false;
     TemporaryFile tmp_file;
-    std::vector<std::string> args = {"-i", perf_data,    "--symfs", GetTestDataDir(),
-                                     "-o", tmp_file.path};
+    std::vector<std::string> args = {"-i", perf_data, "-o", tmp_file.path};
+
+    if (with_symfs) {
+      args.emplace_back("--symfs");
+      args.emplace_back(GetTestDataDir());
+    }
+
     args.insert(args.end(), add_args.begin(), add_args.end());
     ASSERT_TRUE(ReportCmd()->Run(args));
     ASSERT_TRUE(android::base::ReadFileToString(tmp_file.path, &content));
@@ -365,6 +372,13 @@ TEST_F(ReportCommandTest, report_dumped_symbols_with_symfs_dir) {
   ASSERT_NE(content.find("main"), std::string::npos);
 }
 
+TEST_F(ReportCommandTest, report_dumped_symbols_with_symdir) {
+  // Check if we can report symbols by specifying symdir.
+  Report(PERF_DATA, {"--symdir", GetTestDataDir()}, false);
+  ASSERT_TRUE(success);
+  ASSERT_NE(content.find("GlobalFunc"), std::string::npos);
+}
+
 TEST_F(ReportCommandTest, report_without_symfs_dir) {
   TemporaryFile tmpfile;
   ASSERT_TRUE(ReportCmd()->Run({"-i", GetTestData(PERF_DATA), "-o", tmpfile.path}));