llvm-symbolizer: Add a FRAME command.

This command prints a description of the referenced function's stack frame.
For each formal parameter and local variable, the tool prints:

- function name
- variable name
- file/line of declaration
- FP-relative variable location (if available)
- size in bytes
- HWASAN tag offset

This information will be used by the HWASAN runtime to identify local
variables in UAR reports.

Differential Revision: https://reviews.llvm.org/D63468

llvm-svn: 364225

1 files changed, 8 insertions, 0 deletions

diff --git a/llvm/lib/DebugInfo/Symbolize/SymbolizableObjectFile.cpp b/llvm/lib/DebugInfo/Symbolize/SymbolizableObjectFile.cpp
index 62f849f..6092584 100644
--- a/llvm/lib/DebugInfo/Symbolize/SymbolizableObjectFile.cpp
+++ b/llvm/lib/DebugInfo/Symbolize/SymbolizableObjectFile.cpp
@@ -298,6 +298,14 @@ DIGlobal SymbolizableObjectFile::symbolizeData(
   return Res;
 }
 
+std::vector<DILocal> SymbolizableObjectFile::symbolizeFrame(
+    object::SectionedAddress ModuleOffset) const {
+  if (ModuleOffset.SectionIndex == object::SectionedAddress::UndefSection)
+    ModuleOffset.SectionIndex =
+        getModuleSectionIndexForAddress(ModuleOffset.Address);
+  return DebugInfoContext->getLocalsForAddress(ModuleOffset);
+}
+
 /// Search for the first occurence of specified Address in ObjectFile.
 uint64_t SymbolizableObjectFile::getModuleSectionIndexForAddress(
     uint64_t Address) const {