[StackMaps] Add a lightweight parser for stackmap version 1 sections.
The parser provides a convenient interface for reading llvm stackmap v1 sections
in object files.
This patch also includes a new option for llvm-readobj, '-stackmap', which uses
the parser to pretty-print stackmap sections for debugging/testing purposes.
llvm-svn: 240860
diff --git a/llvm/tools/llvm-readobj/COFFDumper.cpp b/llvm/tools/llvm-readobj/COFFDumper.cpp
index 4a1d5da..0041c7e 100644
--- a/llvm/tools/llvm-readobj/COFFDumper.cpp
+++ b/llvm/tools/llvm-readobj/COFFDumper.cpp
@@ -16,6 +16,7 @@
#include "ARMWinEHPrinter.h"
#include "Error.h"
#include "ObjDumper.h"
+#include "StackMapPrinter.h"
#include "StreamWriter.h"
#include "Win64EHDumper.h"
#include "llvm/ADT/DenseMap.h"
@@ -60,7 +61,7 @@
void printCOFFExports() override;
void printCOFFDirectives() override;
void printCOFFBaseReloc() override;
-
+ void printStackMap() const override;
private:
void printSymbol(const SymbolRef &Sym);
void printRelocation(const SectionRef &Section, const RelocationRef &Reloc);
@@ -1140,3 +1141,32 @@
W.printHex("Address", RVA);
}
}
+
+void COFFDumper::printStackMap() const {
+ object::SectionRef StackMapSection;
+ for (auto Sec : Obj->sections()) {
+ StringRef Name;
+ Sec.getName(Name);
+ if (Name == ".llvm_stackmaps") {
+ StackMapSection = Sec;
+ break;
+ }
+ }
+
+ if (StackMapSection == object::SectionRef())
+ return;
+
+ StringRef StackMapContents;
+ StackMapSection.getContents(StackMapContents);
+ ArrayRef<uint8_t> StackMapContentsArray(
+ reinterpret_cast<const uint8_t*>(StackMapContents.data()),
+ StackMapContents.size());
+
+ if (Obj->isLittleEndian())
+ prettyPrintStackMap(
+ llvm::outs(),
+ StackMapV1Parser<support::little>(StackMapContentsArray));
+ else
+ prettyPrintStackMap(llvm::outs(),
+ StackMapV1Parser<support::big>(StackMapContentsArray));
+}