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-rw-r--r--contrib/llvm/lib/DebugInfo/DWARFContext.cpp160
1 files changed, 98 insertions, 62 deletions
diff --git a/contrib/llvm/lib/DebugInfo/DWARFContext.cpp b/contrib/llvm/lib/DebugInfo/DWARFContext.cpp
index 9e19310..9f52133 100644
--- a/contrib/llvm/lib/DebugInfo/DWARFContext.cpp
+++ b/contrib/llvm/lib/DebugInfo/DWARFContext.cpp
@@ -9,6 +9,9 @@
#include "DWARFContext.h"
#include "llvm/ADT/SmallString.h"
+#include "llvm/ADT/StringSwitch.h"
+#include "llvm/ADT/STLExtras.h"
+#include "llvm/Support/Compression.h"
#include "llvm/Support/Dwarf.h"
#include "llvm/Support/Format.h"
#include "llvm/Support/Path.h"
@@ -107,36 +110,43 @@ void DWARFContext::dump(raw_ostream &OS, DIDumpType DumpType) {
}
if (DumpType == DIDT_All || DumpType == DIDT_AbbrevDwo) {
- OS << "\n.debug_abbrev.dwo contents:\n";
- getDebugAbbrevDWO()->dump(OS);
+ const DWARFDebugAbbrev *D = getDebugAbbrevDWO();
+ if (D) {
+ OS << "\n.debug_abbrev.dwo contents:\n";
+ getDebugAbbrevDWO()->dump(OS);
+ }
}
- if (DumpType == DIDT_All || DumpType == DIDT_InfoDwo) {
- OS << "\n.debug_info.dwo contents:\n";
- for (unsigned i = 0, e = getNumDWOCompileUnits(); i != e; ++i)
- getDWOCompileUnitAtIndex(i)->dump(OS);
- }
+ if (DumpType == DIDT_All || DumpType == DIDT_InfoDwo)
+ if (getNumDWOCompileUnits()) {
+ OS << "\n.debug_info.dwo contents:\n";
+ for (unsigned i = 0, e = getNumDWOCompileUnits(); i != e; ++i)
+ getDWOCompileUnitAtIndex(i)->dump(OS);
+ }
- if (DumpType == DIDT_All || DumpType == DIDT_StrDwo) {
- OS << "\n.debug_str.dwo contents:\n";
- DataExtractor strDWOData(getStringDWOSection(), isLittleEndian(), 0);
- offset = 0;
- uint32_t strDWOOffset = 0;
- while (const char *s = strDWOData.getCStr(&offset)) {
- OS << format("0x%8.8x: \"%s\"\n", strDWOOffset, s);
- strDWOOffset = offset;
+ if (DumpType == DIDT_All || DumpType == DIDT_StrDwo)
+ if (!getStringDWOSection().empty()) {
+ OS << "\n.debug_str.dwo contents:\n";
+ DataExtractor strDWOData(getStringDWOSection(), isLittleEndian(), 0);
+ offset = 0;
+ uint32_t strDWOOffset = 0;
+ while (const char *s = strDWOData.getCStr(&offset)) {
+ OS << format("0x%8.8x: \"%s\"\n", strDWOOffset, s);
+ strDWOOffset = offset;
+ }
}
- }
- if (DumpType == DIDT_All || DumpType == DIDT_StrOffsetsDwo) {
- OS << "\n.debug_str_offsets.dwo contents:\n";
- DataExtractor strOffsetExt(getStringOffsetDWOSection(), isLittleEndian(), 0);
- offset = 0;
- while (offset < getStringOffsetDWOSection().size()) {
- OS << format("0x%8.8x: ", offset);
- OS << format("%8.8x\n", strOffsetExt.getU32(&offset));
+ if (DumpType == DIDT_All || DumpType == DIDT_StrOffsetsDwo)
+ if (!getStringOffsetDWOSection().empty()) {
+ OS << "\n.debug_str_offsets.dwo contents:\n";
+ DataExtractor strOffsetExt(getStringOffsetDWOSection(), isLittleEndian(), 0);
+ offset = 0;
+ uint64_t size = getStringOffsetDWOSection().size();
+ while (offset < size) {
+ OS << format("0x%8.8x: ", offset);
+ OS << format("%8.8x\n", strOffsetExt.getU32(&offset));
+ }
}
- }
}
const DWARFDebugAbbrev *DWARFContext::getDebugAbbrev() {
@@ -482,6 +492,22 @@ DIInliningInfo DWARFContext::getInliningInfoForAddress(uint64_t Address,
return InliningInfo;
}
+static bool consumeCompressedDebugSectionHeader(StringRef &data,
+ uint64_t &OriginalSize) {
+ // Consume "ZLIB" prefix.
+ if (!data.startswith("ZLIB"))
+ return false;
+ data = data.substr(4);
+ // Consume uncompressed section size (big-endian 8 bytes).
+ DataExtractor extractor(data, false, 8);
+ uint32_t Offset = 0;
+ OriginalSize = extractor.getU64(&Offset);
+ if (Offset == 0)
+ return false;
+ data = data.substr(Offset);
+ return true;
+}
+
DWARFContextInMemory::DWARFContextInMemory(object::ObjectFile *Obj) :
IsLittleEndian(Obj->isLittleEndian()),
AddressSize(Obj->getBytesInAddress()) {
@@ -495,49 +521,55 @@ DWARFContextInMemory::DWARFContextInMemory(object::ObjectFile *Obj) :
i->getContents(data);
name = name.substr(name.find_first_not_of("._")); // Skip . and _ prefixes.
- if (name == "debug_info")
- InfoSection = data;
- else if (name == "debug_abbrev")
- AbbrevSection = data;
- else if (name == "debug_line")
- LineSection = data;
- else if (name == "debug_aranges")
- ARangeSection = data;
- else if (name == "debug_frame")
- DebugFrameSection = data;
- else if (name == "debug_str")
- StringSection = data;
- else if (name == "debug_ranges") {
+
+ // Check if debug info section is compressed with zlib.
+ if (name.startswith("zdebug_")) {
+ uint64_t OriginalSize;
+ if (!zlib::isAvailable() ||
+ !consumeCompressedDebugSectionHeader(data, OriginalSize))
+ continue;
+ OwningPtr<MemoryBuffer> UncompressedSection;
+ if (zlib::uncompress(data, UncompressedSection, OriginalSize) !=
+ zlib::StatusOK)
+ continue;
+ // Make data point to uncompressed section contents and save its contents.
+ name = name.substr(1);
+ data = UncompressedSection->getBuffer();
+ UncompressedSections.push_back(UncompressedSection.take());
+ }
+
+ StringRef *Section = StringSwitch<StringRef*>(name)
+ .Case("debug_info", &InfoSection)
+ .Case("debug_abbrev", &AbbrevSection)
+ .Case("debug_line", &LineSection)
+ .Case("debug_aranges", &ARangeSection)
+ .Case("debug_frame", &DebugFrameSection)
+ .Case("debug_str", &StringSection)
+ .Case("debug_ranges", &RangeSection)
+ .Case("debug_pubnames", &PubNamesSection)
+ .Case("debug_info.dwo", &InfoDWOSection)
+ .Case("debug_abbrev.dwo", &AbbrevDWOSection)
+ .Case("debug_str.dwo", &StringDWOSection)
+ .Case("debug_str_offsets.dwo", &StringOffsetDWOSection)
+ .Case("debug_addr", &AddrSection)
+ // Any more debug info sections go here.
+ .Default(0);
+ if (!Section)
+ continue;
+ *Section = data;
+ if (name == "debug_ranges") {
// FIXME: Use the other dwo range section when we emit it.
RangeDWOSection = data;
- RangeSection = data;
}
- else if (name == "debug_pubnames")
- PubNamesSection = data;
- else if (name == "debug_info.dwo")
- InfoDWOSection = data;
- else if (name == "debug_abbrev.dwo")
- AbbrevDWOSection = data;
- else if (name == "debug_str.dwo")
- StringDWOSection = data;
- else if (name == "debug_str_offsets.dwo")
- StringOffsetDWOSection = data;
- else if (name == "debug_addr")
- AddrSection = data;
- // Any more debug info sections go here.
- else
- continue;
// TODO: Add support for relocations in other sections as needed.
// Record relocations for the debug_info and debug_line sections.
- RelocAddrMap *Map;
- if (name == "debug_info")
- Map = &InfoRelocMap;
- else if (name == "debug_info.dwo")
- Map = &InfoDWORelocMap;
- else if (name == "debug_line")
- Map = &LineRelocMap;
- else
+ RelocAddrMap *Map = StringSwitch<RelocAddrMap*>(name)
+ .Case("debug_info", &InfoRelocMap)
+ .Case("debug_info.dwo", &InfoDWORelocMap)
+ .Case("debug_line", &LineRelocMap)
+ .Default(0);
+ if (!Map)
continue;
if (i->begin_relocations() != i->end_relocations()) {
@@ -547,7 +579,7 @@ DWARFContextInMemory::DWARFContextInMemory(object::ObjectFile *Obj) :
reloc_e = i->end_relocations();
reloc_i != reloc_e; reloc_i.increment(ec)) {
uint64_t Address;
- reloc_i->getAddress(Address);
+ reloc_i->getOffset(Address);
uint64_t Type;
reloc_i->getType(Type);
uint64_t SymAddr = 0;
@@ -593,4 +625,8 @@ DWARFContextInMemory::DWARFContextInMemory(object::ObjectFile *Obj) :
}
}
+DWARFContextInMemory::~DWARFContextInMemory() {
+ DeleteContainerPointers(UncompressedSections);
+}
+
void DWARFContextInMemory::anchor() { }
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