This patch extends the libLLVMDebugInfo which contains a minimalistic DWARF parser:
1) DIContext is now able to return function name for a given instruction address (besides file/line info).
2) llvm-dwarfdump accepts flag --functions that prints the function name (if address is specified by --address flag).
3) test case that checks the basic functionality of llvm-dwarfdump added
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@159512 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/DebugInfo/DWARFDebugInfoEntry.cpp b/lib/DebugInfo/DWARFDebugInfoEntry.cpp
index 236db97..1024b45 100644
--- a/lib/DebugInfo/DWARFDebugInfoEntry.cpp
+++ b/lib/DebugInfo/DWARFDebugInfoEntry.cpp
@@ -440,3 +440,51 @@
}
}
}
+
+bool
+DWARFDebugInfoEntryMinimal::addressRangeContainsAddress(
+ const DWARFCompileUnit *cu, const uint64_t address) const {
+ if (!isNULL() && getTag() == DW_TAG_subprogram) {
+ uint64_t hi_pc = -1ULL;
+ uint64_t lo_pc = getAttributeValueAsUnsigned(cu, DW_AT_low_pc, -1ULL);
+ if (lo_pc != -1ULL)
+ hi_pc = getAttributeValueAsUnsigned(cu, DW_AT_high_pc, -1ULL);
+ if (hi_pc != -1ULL) {
+ return (lo_pc <= address && address < hi_pc);
+ }
+ }
+ return false;
+}
+
+static inline const char*
+getSubprogramNameFromDie(const DWARFCompileUnit *cu,
+ const DWARFDebugInfoEntryMinimal *die) {
+ const char *result = 0;
+ if (!die->isNULL() && die->getTag() == DW_TAG_subprogram) {
+ // Try to get mangled name if possible.
+ result = die->getAttributeValueAsString(cu, DW_AT_MIPS_linkage_name, 0);
+ if (result == 0)
+ result = die->getAttributeValueAsString(cu, DW_AT_linkage_name, 0);
+ if (result == 0)
+ result = die->getAttributeValueAsString(cu, DW_AT_name, 0);
+ }
+ return result;
+}
+
+const char*
+DWARFDebugInfoEntryMinimal::getSubprogramName(
+ const DWARFCompileUnit *cu) const {
+ if (isNULL() || getTag() != DW_TAG_subprogram)
+ return 0;
+ const char *name = getSubprogramNameFromDie(cu, this);
+ if (name == 0) {
+ // Try to get name from specification DIE.
+ uint32_t ref = getAttributeValueAsReference(cu, DW_AT_specification, -1U);
+ if (ref != -1U) {
+ DWARFDebugInfoEntryMinimal spec_die;
+ if (spec_die.extract(cu, &ref))
+ name = getSubprogramNameFromDie(cu, &spec_die);
+ }
+ }
+ return name;
+}