debugger: make elfreader also report offset and size of sections

Change-Id: I8dd3d20ddc4652dc490d87558f46474f79300389
Reviewed-by: hjk <qthjk@ovi.com>

src/libs/utils/elfreader.cpp

@@ -48,6 +48,21 @@
 
 namespace Utils {
 
+
+typedef quint16  qelfhalf_t;
+typedef quint32  qelfword_t;
+typedef quintptr qelfoff_t;
+typedef quintptr qelfaddr_t;
+
+class ElfSectionHeader
+{
+public:
+    qelfword_t name;
+    qelfword_t type;
+    qelfoff_t  offset;
+    qelfoff_t  size;
+};
+
 template <typename T>
 T read(const char *s, ElfReader::ElfEndian endian)
 {
@@ -78,7 +93,7 @@ const char *ElfReader::parseSectionHeader(const char *data, ElfSectionHeader *sh
 }
 
 ElfReader::Result ElfReader::parse(const char *dataStart, quint64 fdlen,
-    QList<QByteArray> *sectionNames)
+    ElfSections *sections)
 {
     if (fdlen < 64) {
         m_errorString = QLibrary::tr("'%1' is not an ELF object (%2)")
@@ -204,17 +219,22 @@ ElfReader::Result ElfReader::parse(const char *dataStart, quint64 fdlen,
             return Corrupt;
         }
 
-        if (sectionNames)
-            sectionNames->append(shnam);
+        if (sections) {
+            ElfSection section;
+            section.name = shnam;
+            section.index = strtab.name;
+            section.offset = strtab.offset;
+            section.size = strtab.size;
+        }
 
         s += e_shentsize;
     }
     return Ok;
 }
 
-QList<QByteArray> ElfReader::sectionNames()
+ElfSections ElfReader::sections()
 {
-    QList<QByteArray> names;
+    ElfSections names;
 
     QFile file(m_binary);
     if (!file.open(QIODevice::ReadOnly)) {

src/libs/utils/elfreader.h

@@ -52,33 +52,34 @@
 
 namespace Utils {
 
-typedef quint16  qelfhalf_t;
-typedef quint32  qelfword_t;
-typedef quintptr qelfoff_t;
-typedef quintptr qelfaddr_t;
+class ElfSectionHeader;
+
+class QTCREATOR_UTILS_EXPORT ElfSection
+{
+public:
+    QByteArray name;
+    quint32 index;
+    quint32 type;
+    quint64 offset;
+    quint64 size;
+};
+
+typedef QList<ElfSection> ElfSections;
 
 class QTCREATOR_UTILS_EXPORT ElfReader
 {
 public:
     explicit ElfReader(const QString &binary);
 
-    struct ElfSectionHeader
-    {
-        qelfword_t name;
-        qelfword_t type;
-        qelfoff_t  offset;
-        qelfoff_t  size;
-    };
-
     enum ElfEndian { ElfLittleEndian = 0, ElfBigEndian = 1 };
-    QList<QByteArray> sectionNames();
+    ElfSections sections();
     QString errorString() const { return m_errorString; }
 
 private:
     enum Result { Ok, NotElf, Corrupt };
 
     const char *parseSectionHeader(const char *s, ElfSectionHeader *sh);
-    Result parse(const char *dataStart, quint64 fdlen, QList<QByteArray> *sectionNames);
+    Result parse(const char *dataStart, quint64 fdlen, ElfSections *sections);
 
     QString m_binary;
     QString m_errorString;

src/plugins/debugger/gdb/gdbengine.cpp

@@ -3519,16 +3519,25 @@ void GdbEngine::handleModulesList(const GdbResponse &response)
 
 void GdbEngine::examineModule(Module *module)
 {
-    Utils::ElfReader reader(module->modulePath);
-    QList<QByteArray> names = reader.sectionNames();
-    if (names.contains(".gdb_index"))
-        module->symbolsType = Module::FastSymbols;
-    else if (names.contains(".debug_inf"))
-        module->symbolsType = Module::PlainSymbols;
-    else if (names.contains(".gnu_debuglink"))
-        module->symbolsType = Module::SeparateSymbols;
-    else
-        module->symbolsType = Module::NoSymbols;
+    using namespace Utils;
+    ElfReader reader(module->modulePath);
+    ElfSections sections = reader.sections();
+    module->symbolsType = Module::NoSymbols;
+    for (int i = 0, n = sections.size(); i != n; ++i) {
+        const QByteArray &name = sections.at(i).name;
+        if (name == ".gdb_index") {
+            module->symbolsType = Module::FastSymbols;
+            break;
+        }
+        if (name == ".debug_info") {
+            module->symbolsType = Module::PlainSymbols;
+            break;
+        }
+        if (name == ".gnu_debuglink") {
+            module->symbolsType = Module::SeparateSymbols;
+            break;
+        }
+    }
 }
 
 void GdbEngine::examineModules()
@@ -5371,9 +5380,10 @@ bool GdbEngine::attemptQuickStart() const
 
 void GdbEngine::checkForReleaseBuild()
 {
+    using namespace Utils;
     QString binary = startParameters().executable;
-    Utils::ElfReader reader(binary);
-    QList<QByteArray> names = reader.sectionNames();
+    ElfReader reader(binary);
+    ElfSections sections = reader.sections();
     QString error = reader.errorString();
 
     showMessage(_("EXAMINING ") + binary);
@@ -5394,11 +5404,11 @@ void GdbEngine::checkForReleaseBuild()
     }
 
     QSet<QByteArray> seen;
-    foreach (const QByteArray &name, names) {
-        msg.append(name);
+    foreach (const ElfSection &section, sections) {
+        msg.append(section.name);
         msg.append(' ');
-        if (interesting.contains(name))
-            seen.insert(name);
+        if (interesting.contains(section.name))
+            seen.insert(section.name);
     }
     showMessage(_(msg));
 
@@ -5406,13 +5416,16 @@ void GdbEngine::checkForReleaseBuild()
         showMessage(_("ERROR WHILE READING ELF SECTIONS: ") + error);
         return;
     }
-    if (names.isEmpty()) {
-        showMessage(_("NO SECTION HEADERS FOUND"));
+
+    if (sections.isEmpty()) {
+        showMessage(_("NO SECTION HEADERS FOUND. IS THIS AN EXECUTABLE?"));
         return;
     }
 
-    if (names.contains(".debug_info"))
-        return;
+    foreach (const ElfSection &section, sections) {
+        if (section.name == ".debug_info")
+            return;
+    }
 
     QString warning;
     warning = tr("This does not seem to be a \"Debug\" build.\n"