From 9aaae654660bedfb521bfc1c4eec5b953b2a6aca Mon Sep 17 00:00:00 2001
From: "wfh@chromium.org"
 <wfh@chromium.org@4c0a9323-5329-0410-9bdc-e9ce6186880e>
Date: Wed, 23 Apr 2014 17:27:01 +0000
Subject: Change PrintFunctions to print functions in address order and not
 print duplicate public functions.

BUG=427
R=mark@chromium.org

Review URL: https://breakpad.appspot.com/1634002

git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@1319 4c0a9323-5329-0410-9bdc-e9ce6186880e
---
 src/common/windows/pdb_source_line_writer.cc | 64 +++++++++++++++++++++++-----
 1 file changed, 53 insertions(+), 11 deletions(-)

(limited to 'src/common')

diff --git a/src/common/windows/pdb_source_line_writer.cc b/src/common/windows/pdb_source_line_writer.cc
index e1307f78..9f4041d5 100644
--- a/src/common/windows/pdb_source_line_writer.cc
+++ b/src/common/windows/pdb_source_line_writer.cc
@@ -347,7 +347,6 @@ bool PDBSourceLineWriter::PrintFunctions() {
   ULONG count = 0;
   DWORD rva = 0;
   CComPtr<IDiaSymbol> global;
-  std::set<DWORD> rvas;
   HRESULT hr;
 
   if (FAILED(session_->get_globalScope(&global))) {
@@ -357,35 +356,42 @@ bool PDBSourceLineWriter::PrintFunctions() {
 
   CComPtr<IDiaEnumSymbols> symbols = NULL;
 
-  // Find all public symbols.
-  hr = global->findChildren(SymTagPublicSymbol, NULL, nsNone, &symbols);
+  // Find all function symbols first.
+  std::set<DWORD> rvas;
+  hr = global->findChildren(SymTagFunction, NULL, nsNone, &symbols);
 
   if (SUCCEEDED(hr)) {
     CComPtr<IDiaSymbol> symbol = NULL;
 
     while (SUCCEEDED(symbols->Next(1, &symbol, &count)) && count == 1) {
-      if (!PrintCodePublicSymbol(symbol))
+      if (SUCCEEDED(symbol->get_relativeVirtualAddress(&rva))) {
+        // To maintain existing behavior of one symbol per address, place the
+        // rva onto a set here to uniquify them.
+        rvas.insert(rva);
+      } else {
+        fprintf(stderr, "get_relativeVirtualAddress failed on the symbol\n");
         return false;
+      }
+
       symbol.Release();
     }
 
     symbols.Release();
   }
 
-  // Find all function symbols.
-  hr = global->findChildren(SymTagFunction, NULL, nsNone, &symbols);
+  // Find all public symbols.  Store public symbols that are not also private
+  // symbols for later.
+  std::set<DWORD> public_only_rvas;
+  hr = global->findChildren(SymTagPublicSymbol, NULL, nsNone, &symbols);
 
   if (SUCCEEDED(hr)) {
     CComPtr<IDiaSymbol> symbol = NULL;
 
     while (SUCCEEDED(symbols->Next(1, &symbol, &count)) && count == 1) {
       if (SUCCEEDED(symbol->get_relativeVirtualAddress(&rva))) {
-        // To maintain existing behavior of one symbol per address, place the
-        // rva onto a set here to uniquify them.
         if (rvas.count(rva) == 0) {
-          rvas.insert(rva);
-          if (!PrintFunction(symbol, symbol))
-            return false;
+          rvas.insert(rva); // Keep symbols in rva order.
+          public_only_rvas.insert(rva);
         }
       } else {
         fprintf(stderr, "get_relativeVirtualAddress failed on the symbol\n");
@@ -398,6 +404,42 @@ bool PDBSourceLineWriter::PrintFunctions() {
     symbols.Release();
   }
 
+  std::set<DWORD>::iterator it;
+
+  // For each rva, dump the first symbol DIA knows about at the address.
+  for (it = rvas.begin(); it != rvas.end(); ++it) {
+    CComPtr<IDiaSymbol> symbol = NULL;
+    // If the symbol is not in the public list, look for SymTagFunction. This is
+    // a workaround to a bug where DIA will hang if searching for a private
+    // symbol at an address where only a public symbol exists.
+    // See http://connect.microsoft.com/VisualStudio/feedback/details/722366
+    if (public_only_rvas.count(*it) == 0) {
+      if (SUCCEEDED(session_->findSymbolByRVA(*it, SymTagFunction, &symbol))) {
+        // Sometimes findSymbolByRVA returns S_OK, but NULL.
+        if (symbol) {
+          if (!PrintFunction(symbol, symbol))
+            return false;
+          symbol.Release();
+        }
+      } else {
+        fprintf(stderr, "findSymbolByRVA SymTagFunction failed\n");
+        return false;
+      }
+    } else if (SUCCEEDED(session_->findSymbolByRVA(*it,
+                                                   SymTagPublicSymbol,
+                                                   &symbol))) {
+      // Sometimes findSymbolByRVA returns S_OK, but NULL.
+      if (symbol) {
+        if (!PrintCodePublicSymbol(symbol))
+          return false;
+        symbol.Release();
+      }
+    } else {
+      fprintf(stderr, "findSymbolByRVA SymTagPublicSymbol failed\n");
+      return false;
+    }
+  }
+
   // When building with PGO, the compiler can split functions into
   // "hot" and "cold" blocks, and move the "cold" blocks out to separate
   // pages, so the function can be noncontiguous. To find these blocks,
-- 
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