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authorBenjamin Kramer <benny.kra@googlemail.com>2011-09-13 19:42:23 +0000
committerBenjamin Kramer <benny.kra@googlemail.com>2011-09-13 19:42:23 +0000
commit72c0d7fdd3d0930c7507060e96aec7d7429a8190 (patch)
tree78cea7afdfd25de5a88d35782530bc2e58049eb0 /tools/llvm-dwarfdump
parent8c74f7f2991a10977fd5a003b2901b56eb2e19a8 (diff)
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Sketch out a DWARF parser.
This introduces a new library to LLVM: libDebugInfo. It will provide debug information parsing to LLVM. Much of the design and some of the code is taken from the LLDB project. It also contains an llvm-dwarfdump tool that can dump the abbrevs and DIEs from an object file. It can be used to write tests for DWARF input and output easily. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139627 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'tools/llvm-dwarfdump')
-rw-r--r--tools/llvm-dwarfdump/CMakeLists.txt8
-rw-r--r--tools/llvm-dwarfdump/Makefile17
-rw-r--r--tools/llvm-dwarfdump/llvm-dwarfdump.cpp93
3 files changed, 118 insertions, 0 deletions
diff --git a/tools/llvm-dwarfdump/CMakeLists.txt b/tools/llvm-dwarfdump/CMakeLists.txt
new file mode 100644
index 0000000000..05aad3f0b0
--- /dev/null
+++ b/tools/llvm-dwarfdump/CMakeLists.txt
@@ -0,0 +1,8 @@
+set(LLVM_LINK_COMPONENTS
+ DebugInfo
+ Object
+ )
+
+add_llvm_tool(llvm-dwarfdump
+ llvm-dwarfdump.cpp
+ )
diff --git a/tools/llvm-dwarfdump/Makefile b/tools/llvm-dwarfdump/Makefile
new file mode 100644
index 0000000000..e61f27d298
--- /dev/null
+++ b/tools/llvm-dwarfdump/Makefile
@@ -0,0 +1,17 @@
+##===- tools/llvm-dwarfdump/Makefile -----------------------*- Makefile -*-===##
+#
+# The LLVM Compiler Infrastructure
+#
+# This file is distributed under the University of Illinois Open Source
+# License. See LICENSE.TXT for details.
+#
+##===----------------------------------------------------------------------===##
+LEVEL = ../..
+
+TOOLNAME = llvm-dwarfdump
+LINK_COMPONENTS = DebugInfo Object
+
+# This tool has no plugins, optimize startup time.
+TOOL_NO_EXPORTS = 1
+
+include $(LEVEL)/Makefile.common
diff --git a/tools/llvm-dwarfdump/llvm-dwarfdump.cpp b/tools/llvm-dwarfdump/llvm-dwarfdump.cpp
new file mode 100644
index 0000000000..cf8b4d0806
--- /dev/null
+++ b/tools/llvm-dwarfdump/llvm-dwarfdump.cpp
@@ -0,0 +1,93 @@
+//===-- llvm-dwarfdump.cpp - Debug info dumping utility for llvm -----------===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This program is a utility that works like "dwarfdump".
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/ADT/OwningPtr.h"
+#include "llvm/ADT/Triple.h"
+#include "llvm/ADT/STLExtras.h"
+#include "llvm/Object/ObjectFile.h"
+#include "llvm/DebugInfo/DIContext.h"
+#include "llvm/Support/CommandLine.h"
+#include "llvm/Support/Debug.h"
+#include "llvm/Support/Format.h"
+#include "llvm/Support/ManagedStatic.h"
+#include "llvm/Support/MemoryBuffer.h"
+#include "llvm/Support/MemoryObject.h"
+#include "llvm/Support/PrettyStackTrace.h"
+#include "llvm/Support/Signals.h"
+#include "llvm/Support/raw_ostream.h"
+#include "llvm/Support/system_error.h"
+#include <algorithm>
+#include <cstring>
+using namespace llvm;
+using namespace object;
+
+static cl::list<std::string>
+InputFilenames(cl::Positional, cl::desc("<input object files>"),
+ cl::ZeroOrMore);
+
+static void DumpInput(const StringRef &Filename) {
+ OwningPtr<MemoryBuffer> Buff;
+
+ if (error_code ec = MemoryBuffer::getFileOrSTDIN(Filename, Buff)) {
+ errs() << Filename << ": " << ec.message() << "\n";
+ return;
+ }
+
+ OwningPtr<ObjectFile> Obj(ObjectFile::createObjectFile(Buff.take()));
+
+ outs() << '\n';
+ outs() << Filename
+ << ":\tfile format " << Obj->getFileFormatName() << "\n\n";
+
+ StringRef DebugInfoSection;
+ StringRef DebugAbbrevSection;
+ StringRef DebugLineSection;
+
+ error_code ec;
+ for (ObjectFile::section_iterator i = Obj->begin_sections(),
+ e = Obj->end_sections();
+ i != e; i.increment(ec)) {
+ StringRef name;
+ i->getName(name);
+ StringRef data;
+ i->getContents(data);
+ if (name.endswith("debug_info"))
+ DebugInfoSection = data;
+ else if (name.endswith("debug_abbrev"))
+ DebugAbbrevSection = data;
+ else if (name.endswith("debug_line"))
+ DebugLineSection = data;
+ }
+
+ OwningPtr<DIContext> dictx(DIContext::getDWARFContext(/*FIXME*/true,
+ DebugInfoSection,
+ DebugAbbrevSection));
+ dictx->dump(outs());
+}
+
+int main(int argc, char **argv) {
+ // Print a stack trace if we signal out.
+ sys::PrintStackTraceOnErrorSignal();
+ PrettyStackTraceProgram X(argc, argv);
+ llvm_shutdown_obj Y; // Call llvm_shutdown() on exit.
+
+ cl::ParseCommandLineOptions(argc, argv, "llvm dwarf dumper\n");
+
+ // Defaults to a.out if no filenames specified.
+ if (InputFilenames.size() == 0)
+ InputFilenames.push_back("a.out");
+
+ std::for_each(InputFilenames.begin(), InputFilenames.end(), DumpInput);
+
+ return 0;
+}