From: Alexey Samsonov <samsonov@google.com>
Date: Tue, 24 Dec 2013 19:33:22 +0000 (+0000)
Subject: llvm-symbolizer: add --obj flag to specify a single object file that should be symbol... 
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=42c9ecb7a4c1fa61593cba5a025272fb933616b5;p=oota-llvm.git

llvm-symbolizer: add --obj flag to specify a single object file that should be symbolized.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@197988 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/docs/CommandGuide/llvm-symbolizer.rst b/docs/CommandGuide/llvm-symbolizer.rst
index e03be9b1987..dfbdb3ac434 100644
--- a/docs/CommandGuide/llvm-symbolizer.rst
+++ b/docs/CommandGuide/llvm-symbolizer.rst
@@ -10,7 +10,9 @@ DESCRIPTION
 -----------
 
 :program:`llvm-symbolizer` reads object file names and addresses from standard
-input and prints corresponding source code locations to standard output. This
+input and prints corresponding source code locations to standard output.
+If object file is specified in command line, :program:`llvm-symbolizer` reads
+only addresses from standard input. This
 program uses debug info sections and symbol table in the object files.
 
 EXAMPLE
@@ -45,10 +47,22 @@ EXAMPLE
 
   _main
   /tmp/source_x86_64.cc:8
+  $ cat addr2.txt
+  0x4004f4
+  0x401000
+  $ llvm-symbolizer -obj=a.out < addr2.txt
+  main
+  /tmp/a.cc:4
+
+  foo(int)
+  /tmp/a.cc:12
 
 OPTIONS
 -------
 
+.. option:: -obj
+  Path to object file to be symbolized.
+
 .. option:: -functions
 
   Print function names as well as source file/line locations. Defaults to true.
diff --git a/test/DebugInfo/llvm-symbolizer.test b/test/DebugInfo/llvm-symbolizer.test
index a8799cfa546..897cc3e0d5d 100644
--- a/test/DebugInfo/llvm-symbolizer.test
+++ b/test/DebugInfo/llvm-symbolizer.test
@@ -57,3 +57,12 @@ RUN: llvm-symbolizer < %t.input3 | FileCheck %s --check-prefix=UNKNOWN-ARCH
 UNKNOWN-ARCH-NOT: main
 UNKNOWN-ARCH: ??
 UNKNOWN-ARCH-NOT: main
+
+RUN: echo "0x400559" > %t.input4
+RUN: echo "0x400436" >> %t.input4
+RUN: llvm-symbolizer --obj %p/Inputs/dwarfdump-test.elf-x86-64 < %t.input4 \
+RUN:   | FileCheck %s --check-prefix=BINARY
+
+BINARY:       main
+BINARY-NEXT: /tmp/dbginfo{{[/\\]}}dwarfdump-test.cc:16
+BINARY:      _start
diff --git a/tools/llvm-symbolizer/llvm-symbolizer.cpp b/tools/llvm-symbolizer/llvm-symbolizer.cpp
index c32e9494ea3..83f5c5ea88b 100644
--- a/tools/llvm-symbolizer/llvm-symbolizer.cpp
+++ b/tools/llvm-symbolizer/llvm-symbolizer.cpp
@@ -51,6 +51,11 @@ static cl::opt<std::string> ClDefaultArch("default-arch", cl::init(""),
                                           cl::desc("Default architecture "
                                                    "(for multi-arch objects)"));
 
+static cl::opt<std::string>
+ClBinaryName("obj", cl::init(""),
+             cl::desc("Path to object file to be symbolized (if not provided, "
+                      "object file should be specified for each input line)"));
+
 static bool parseCommand(bool &IsData, std::string &ModuleName,
                          uint64_t &ModuleOffset) {
   const char *kDataCmd = "DATA ";
@@ -62,7 +67,6 @@ static bool parseCommand(bool &IsData, std::string &ModuleName,
     return false;
   IsData = false;
   ModuleName = "";
-  std::string ModuleOffsetStr = "";
   char *pos = InputString;
   if (strncmp(pos, kDataCmd, strlen(kDataCmd)) == 0) {
     IsData = true;
@@ -74,26 +78,29 @@ static bool parseCommand(bool &IsData, std::string &ModuleName,
     // If no cmd, assume it's CODE.
     IsData = false;
   }
-  // Skip delimiters and parse input filename.
-  pos += strspn(pos, kDelimiters);
-  if (*pos == '"' || *pos == '\'') {
-    char quote = *pos;
-    pos++;
-    char *end = strchr(pos, quote);
-    if (end == 0)
-      return false;
-    ModuleName = std::string(pos, end - pos);
-    pos = end + 1;
+  // Skip delimiters and parse input filename (if needed).
+  if (ClBinaryName == "") {
+    pos += strspn(pos, kDelimiters);
+    if (*pos == '"' || *pos == '\'') {
+      char quote = *pos;
+      pos++;
+      char *end = strchr(pos, quote);
+      if (end == 0)
+        return false;
+      ModuleName = std::string(pos, end - pos);
+      pos = end + 1;
+    } else {
+      int name_length = strcspn(pos, kDelimiters);
+      ModuleName = std::string(pos, name_length);
+      pos += name_length;
+    }
   } else {
-    int name_length = strcspn(pos, kDelimiters);
-    ModuleName = std::string(pos, name_length);
-    pos += name_length;
+    ModuleName = ClBinaryName;
   }
   // Skip delimiters and parse module offset.
   pos += strspn(pos, kDelimiters);
   int offset_length = strcspn(pos, kDelimiters);
-  ModuleOffsetStr = std::string(pos, offset_length);
-  if (StringRef(ModuleOffsetStr).getAsInteger(0, ModuleOffset))
+  if (StringRef(pos, offset_length).getAsInteger(0, ModuleOffset))
     return false;
   return true;
 }
@@ -104,7 +111,7 @@ int main(int argc, char **argv) {
   PrettyStackTraceProgram X(argc, argv);
   llvm_shutdown_obj Y; // Call llvm_shutdown() on exit.
 
-  cl::ParseCommandLineOptions(argc, argv, "llvm symbolizer for compiler-rt\n");
+  cl::ParseCommandLineOptions(argc, argv, "llvm-symbolizer\n");
   LLVMSymbolizer::Options Opts(ClUseSymbolTable, ClPrintFunctions,
                                ClPrintInlining, ClDemangle, ClDefaultArch);
   LLVMSymbolizer Symbolizer(Opts);