[Lldb-commits] [lldb] Fix debug info size statistics for split dwarf (PR #80218)
via lldb-commits
lldb-commits at lists.llvm.org
Wed Jan 31 15:54:46 PST 2024
https://github.com/jeffreytan81 created https://github.com/llvm/llvm-project/pull/80218
`statistics dump` command relies on `SymbolFile::GetDebugInfoSize()` to get total debug info size.
The current implementation is missing debug info for split dwarf scenarios which requires getting debug info from separate dwo/dwp files.
This patch fixes this issue for split dwarf by parsing debug info from dwp/dwo.
New yaml tests are added.
>From abfec9a970dd5fb4d5612638e14208555afe582e Mon Sep 17 00:00:00 2001
From: jeffreytan81 <jeffreytan at fb.com>
Date: Wed, 31 Jan 2024 15:53:46 -0800
Subject: [PATCH] Fix debug info size statistics for split dwarf
---
.../SymbolFile/DWARF/SymbolFileDWARF.cpp | 23 +
.../SymbolFile/DWARF/SymbolFileDWARF.h | 2 +
.../SymbolFile/DWARF/SymbolFileDWARFDwo.cpp | 11 +
.../SymbolFile/DWARF/SymbolFileDWARFDwo.h | 2 +
.../target/debuginfo/TestDebugInfoSize.py | 133 ++
.../target/debuginfo/a.out-foo.dwo.yaml | 37 +
.../target/debuginfo/a.out-main.dwo.yaml | 37 +
.../API/commands/target/debuginfo/a.out.yaml | 1273 +++++++++++++++++
8 files changed, 1518 insertions(+)
create mode 100644 lldb/test/API/commands/target/debuginfo/TestDebugInfoSize.py
create mode 100644 lldb/test/API/commands/target/debuginfo/a.out-foo.dwo.yaml
create mode 100644 lldb/test/API/commands/target/debuginfo/a.out-main.dwo.yaml
create mode 100644 lldb/test/API/commands/target/debuginfo/a.out.yaml
diff --git a/lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.cpp b/lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.cpp
index fed97858c83f8..7ab75a9ce2c6b 100644
--- a/lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.cpp
+++ b/lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.cpp
@@ -2667,6 +2667,29 @@ static bool UpdateCompilerContextForSimpleTemplateNames(TypeQuery &match) {
}
return any_context_updated;
}
+
+uint64_t SymbolFileDWARF::GetDebugInfoSize() {
+ DWARFDebugInfo &info = DebugInfo();
+ uint32_t num_comp_units = info.GetNumUnits();
+
+ uint64_t debug_info_size = SymbolFileCommon::GetDebugInfoSize();
+ // In dwp scenario, debug info == skeleton debug info + dwp debug info.
+ if (std::shared_ptr<SymbolFileDWARFDwo> dwp_sp = GetDwpSymbolFile())
+ return debug_info_size + dwp_sp->GetDebugInfoSize();
+
+ // In dwo scenario, debug info == skeleton debug info + all dwo debug info.
+ for (uint32_t i = 0; i < num_comp_units; i++) {
+ DWARFUnit *cu = info.GetUnitAtIndex(i);
+ if (cu == nullptr)
+ continue;
+
+ SymbolFileDWARFDwo *dwo = cu->GetDwoSymbolFile();
+ if (dwo)
+ debug_info_size += dwo->GetDebugInfoSize();
+ }
+ return debug_info_size;
+}
+
void SymbolFileDWARF::FindTypes(const TypeQuery &query, TypeResults &results) {
// Make sure we haven't already searched this SymbolFile before.
diff --git a/lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.h b/lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.h
index 26a9502f90aa0..6d87530acf833 100644
--- a/lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.h
+++ b/lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARF.h
@@ -186,6 +186,8 @@ class SymbolFileDWARF : public SymbolFileCommon {
GetMangledNamesForFunction(const std::string &scope_qualified_name,
std::vector<ConstString> &mangled_names) override;
+ uint64_t GetDebugInfoSize() override;
+
void FindTypes(const lldb_private::TypeQuery &match,
lldb_private::TypeResults &results) override;
diff --git a/lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARFDwo.cpp b/lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARFDwo.cpp
index ca698a84a9146..b52cb514fb190 100644
--- a/lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARFDwo.cpp
+++ b/lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARFDwo.cpp
@@ -85,6 +85,17 @@ lldb::offset_t SymbolFileDWARFDwo::GetVendorDWARFOpcodeSize(
return GetBaseSymbolFile().GetVendorDWARFOpcodeSize(data, data_offset, op);
}
+uint64_t SymbolFileDWARFDwo::GetDebugInfoSize() {
+ // Directly get debug info from current dwo object file's section list
+ // instead of asking SymbolFileCommon::GetDebugInfo() which parses from
+ // owning module which is wrong.
+ SectionList *section_list =
+ m_objfile_sp->GetSectionList(/*update_module_section_list=*/false);
+ if (section_list)
+ return section_list->GetDebugInfoSize();
+ return 0;
+}
+
bool SymbolFileDWARFDwo::ParseVendorDWARFOpcode(
uint8_t op, const lldb_private::DataExtractor &opcodes,
lldb::offset_t &offset, std::vector<lldb_private::Value> &stack) const {
diff --git a/lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARFDwo.h b/lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARFDwo.h
index 9f5950e51b0c1..5c4b36328cbac 100644
--- a/lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARFDwo.h
+++ b/lldb/source/Plugins/SymbolFile/DWARF/SymbolFileDWARFDwo.h
@@ -47,6 +47,8 @@ class SymbolFileDWARFDwo : public SymbolFileDWARF {
const lldb::offset_t data_offset,
const uint8_t op) const override;
+ uint64_t GetDebugInfoSize() override;
+
bool ParseVendorDWARFOpcode(uint8_t op, const DataExtractor &opcodes,
lldb::offset_t &offset,
std::vector<Value> &stack) const override;
diff --git a/lldb/test/API/commands/target/debuginfo/TestDebugInfoSize.py b/lldb/test/API/commands/target/debuginfo/TestDebugInfoSize.py
new file mode 100644
index 0000000000000..ecb155d016a07
--- /dev/null
+++ b/lldb/test/API/commands/target/debuginfo/TestDebugInfoSize.py
@@ -0,0 +1,133 @@
+"""
+Test SBTarget.GetStatistics() reporting for dwo files.
+"""
+
+import json
+import os
+
+from lldbsuite.test import lldbtest, lldbutil
+from lldbsuite.test.decorators import *
+from lldbsuite.test_event.build_exception import BuildError
+
+
+SKELETON_DEBUGINFO_SIZE = 602
+MAIN_DWO_DEBUGINFO_SIZE = 385
+FOO_DWO_DEBUGINFO_SIZE = 380
+
+
+class TestDebugInfoSize(lldbtest.TestBase):
+
+ def get_output_from_yaml(self):
+ exe = self.getBuildArtifact("a.out")
+ main_dwo = self.getBuildArtifact("a.out-main.dwo")
+ foo_dwo = self.getBuildArtifact("a.out-foo.dwo")
+
+ src_dir = self.getSourceDir()
+ exe_yaml_path = os.path.join(src_dir, "a.out.yaml")
+ self.yaml2obj(exe_yaml_path, exe)
+
+ main_dwo_yaml_path = os.path.join(src_dir, "a.out-main.dwo.yaml")
+ self.yaml2obj(main_dwo_yaml_path, main_dwo)
+
+ foo_dwo_yaml_path = os.path.join(src_dir, "a.out-foo.dwo.yaml")
+ self.yaml2obj(foo_dwo_yaml_path, foo_dwo)
+ return (exe, main_dwo, foo_dwo)
+
+ @add_test_categories(["dwo"])
+ def test_dwo(self):
+ (exe, main_dwo, foo_dwo) = self.get_output_from_yaml()
+
+ # Make sure dwo files exist
+ self.assertTrue(os.path.exists(main_dwo), f'Make sure "{main_dwo}" file exists')
+ self.assertTrue(os.path.exists(foo_dwo), f'Make sure "{foo_dwo}" file exists')
+
+ target = self.dbg.CreateTarget(exe)
+ self.assertTrue(target, lldbtest.VALID_TARGET)
+
+ stats = target.GetStatistics()
+ stream = lldb.SBStream()
+ res = stats.GetAsJSON(stream)
+ debug_stats = json.loads(stream.GetData())
+ self.assertEqual(
+ "totalDebugInfoByteSize" in debug_stats,
+ True,
+ 'Make sure the "totalDebugInfoByteSize" key is in target.GetStatistics()',
+ )
+ self.assertEqual(
+ debug_stats["totalDebugInfoByteSize"],
+ SKELETON_DEBUGINFO_SIZE + MAIN_DWO_DEBUGINFO_SIZE + FOO_DWO_DEBUGINFO_SIZE,
+ )
+
+ @add_test_categories(["dwo"])
+ def test_only_load_skeleton_debuginfo(self):
+ (exe, main_dwo, foo_dwo) = self.get_output_from_yaml()
+
+ # REMOVE one of the dwo files
+ os.unlink(main_dwo)
+ os.unlink(foo_dwo)
+
+ target = self.dbg.CreateTarget(exe)
+ self.assertTrue(target, lldbtest.VALID_TARGET)
+
+ stats = target.GetStatistics()
+ stream = lldb.SBStream()
+ res = stats.GetAsJSON(stream)
+ debug_stats = json.loads(stream.GetData())
+ self.assertEqual(
+ "totalDebugInfoByteSize" in debug_stats,
+ True,
+ 'Make sure the "totalDebugInfoByteSize" key is in target.GetStatistics()',
+ )
+ self.assertEqual(debug_stats["totalDebugInfoByteSize"], SKELETON_DEBUGINFO_SIZE)
+
+ @add_test_categories(["dwo"])
+ def test_load_partial_dwos(self):
+ (exe, main_dwo, foo_dwo) = self.get_output_from_yaml()
+
+ # REMOVE one of the dwo files
+ os.unlink(main_dwo)
+
+ target = self.dbg.CreateTarget(exe)
+ self.assertTrue(target, lldbtest.VALID_TARGET)
+
+ stats = target.GetStatistics()
+ stream = lldb.SBStream()
+ res = stats.GetAsJSON(stream)
+ debug_stats = json.loads(stream.GetData())
+ self.assertEqual(
+ "totalDebugInfoByteSize" in debug_stats,
+ True,
+ 'Make sure the "totalDebugInfoByteSize" key is in target.GetStatistics()',
+ )
+ self.assertEqual(
+ debug_stats["totalDebugInfoByteSize"],
+ SKELETON_DEBUGINFO_SIZE + FOO_DWO_DEBUGINFO_SIZE,
+ )
+
+ @add_test_categories(["dwo"])
+ def test_dwos_loaded_symbols_on_demand(self):
+ (exe, main_dwo, foo_dwo) = self.get_output_from_yaml()
+
+ # Make sure dwo files exist
+ self.assertTrue(os.path.exists(main_dwo), f'Make sure "{main_dwo}" file exists')
+ self.assertTrue(os.path.exists(foo_dwo), f'Make sure "{foo_dwo}" file exists')
+
+ # Load symbols on-demand
+ self.runCmd("settings set symbols.load-on-demand true")
+
+ target = self.dbg.CreateTarget(exe)
+ self.assertTrue(target, lldbtest.VALID_TARGET)
+
+ stats = target.GetStatistics()
+ stream = lldb.SBStream()
+ res = stats.GetAsJSON(stream)
+ debug_stats = json.loads(stream.GetData())
+ self.assertEqual(
+ "totalDebugInfoByteSize" in debug_stats,
+ True,
+ 'Make sure the "totalDebugInfoByteSize" key is in target.GetStatistics()',
+ )
+ self.assertEqual(
+ debug_stats["totalDebugInfoByteSize"],
+ SKELETON_DEBUGINFO_SIZE + MAIN_DWO_DEBUGINFO_SIZE + FOO_DWO_DEBUGINFO_SIZE,
+ )
diff --git a/lldb/test/API/commands/target/debuginfo/a.out-foo.dwo.yaml b/lldb/test/API/commands/target/debuginfo/a.out-foo.dwo.yaml
new file mode 100644
index 0000000000000..7a59fd67bc08b
--- /dev/null
+++ b/lldb/test/API/commands/target/debuginfo/a.out-foo.dwo.yaml
@@ -0,0 +1,37 @@
+--- !ELF
+FileHeader:
+ Class: ELFCLASS64
+ Data: ELFDATA2LSB
+ Type: ET_REL
+ Machine: EM_X86_64
+ SectionHeaderStringTable: .strtab
+Sections:
+ - Name: .debug_str_offsets.dwo
+ Type: SHT_PROGBITS
+ Flags: [ SHF_EXCLUDE ]
+ AddressAlign: 0x1
+ Content: 180000000500000000000000040000000800000097000000F6000000
+ - Name: .debug_str.dwo
+ Type: SHT_PROGBITS
+ Flags: [ SHF_EXCLUDE, SHF_MERGE, SHF_STRINGS ]
+ AddressAlign: 0x1
+ EntSize: 0x1
+ Content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
+ - Name: .debug_info.dwo
+ Type: SHT_PROGBITS
+ Flags: [ SHF_EXCLUDE ]
+ AddressAlign: 0x1
+ Content: 2A0000000500050800000000495EA96AE5C99FC401021D00030402000B0000000156000003290000000301050400
+ - Name: .debug_abbrev.dwo
+ Type: SHT_PROGBITS
+ Flags: [ SHF_EXCLUDE ]
+ AddressAlign: 0x1
+ Content: 01110125251305032576250000022E00111B1206401803253A0B3B0B49133F19000003240003253E0B0B0B000000
+ - Type: SectionHeaderTable
+ Sections:
+ - Name: .strtab
+ - Name: .debug_str_offsets.dwo
+ - Name: .debug_str.dwo
+ - Name: .debug_info.dwo
+ - Name: .debug_abbrev.dwo
+...
diff --git a/lldb/test/API/commands/target/debuginfo/a.out-main.dwo.yaml b/lldb/test/API/commands/target/debuginfo/a.out-main.dwo.yaml
new file mode 100644
index 0000000000000..997158b8f918b
--- /dev/null
+++ b/lldb/test/API/commands/target/debuginfo/a.out-main.dwo.yaml
@@ -0,0 +1,37 @@
+--- !ELF
+FileHeader:
+ Class: ELFCLASS64
+ Data: ELFDATA2LSB
+ Type: ET_REL
+ Machine: EM_X86_64
+ SectionHeaderStringTable: .strtab
+Sections:
+ - Name: .debug_str_offsets.dwo
+ Type: SHT_PROGBITS
+ Flags: [ SHF_EXCLUDE ]
+ AddressAlign: 0x1
+ Content: 180000000500000000000000050000000900000098000000F8000000
+ - Name: .debug_str.dwo
+ Type: SHT_PROGBITS
+ Flags: [ SHF_EXCLUDE, SHF_MERGE, SHF_STRINGS ]
+ AddressAlign: 0x1
+ EntSize: 0x1
+ Content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
+ - Name: .debug_info.dwo
+ Type: SHT_PROGBITS
+ Flags: [ SHF_EXCLUDE ]
+ AddressAlign: 0x1
+ Content: 2A000000050005080000000037AA38DE48449DD701021D00030402001C0000000156000103290000000301050400
+ - Name: .debug_abbrev.dwo
+ Type: SHT_PROGBITS
+ Flags: [ SHF_EXCLUDE ]
+ AddressAlign: 0x1
+ Content: 01110125251305032576250000022E00111B1206401803253A0B3B0B271949133F19000003240003253E0B0B0B000000
+ - Type: SectionHeaderTable
+ Sections:
+ - Name: .strtab
+ - Name: .debug_str_offsets.dwo
+ - Name: .debug_str.dwo
+ - Name: .debug_info.dwo
+ - Name: .debug_abbrev.dwo
+...
diff --git a/lldb/test/API/commands/target/debuginfo/a.out.yaml b/lldb/test/API/commands/target/debuginfo/a.out.yaml
new file mode 100644
index 0000000000000..95578c358f497
--- /dev/null
+++ b/lldb/test/API/commands/target/debuginfo/a.out.yaml
@@ -0,0 +1,1273 @@
+--- !ELF
+FileHeader:
+ Class: ELFCLASS64
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+ Machine: EM_X86_64
+ Entry: 0x4F0
+ProgramHeaders:
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