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authorDimitry Andric <dim@FreeBSD.org>2017-01-02 19:26:05 +0000
committerDimitry Andric <dim@FreeBSD.org>2017-01-02 19:26:05 +0000
commit14f1b3e8826ce43b978db93a62d1166055db5394 (patch)
tree0a00ad8d3498783fe0193f3b656bca17c4c8697d /source/Symbol/UnwindTable.cpp
parent4ee8c119c71a06dcad1e0fecc8c675e480e59337 (diff)
downloadsrc-14f1b3e8826ce43b978db93a62d1166055db5394.tar.gz
src-14f1b3e8826ce43b978db93a62d1166055db5394.zip
Vendor import of lldb trunk r290819:vendor/lldb/lldb-trunk-r290819
Notes
Notes: svn path=/vendor/lldb/dist/; revision=311128 svn path=/vendor/lldb/lldb-trunk-r290819/; revision=311129; tag=vendor/lldb/lldb-trunk-r290819
Diffstat (limited to 'source/Symbol/UnwindTable.cpp')
-rw-r--r--source/Symbol/UnwindTable.cpp269
1 files changed, 126 insertions, 143 deletions
diff --git a/source/Symbol/UnwindTable.cpp b/source/Symbol/UnwindTable.cpp
index 87c18d94b070..336f0c3e04a7 100644
--- a/source/Symbol/UnwindTable.cpp
+++ b/source/Symbol/UnwindTable.cpp
@@ -13,185 +13,168 @@
#include "lldb/Core/Module.h"
#include "lldb/Core/Section.h"
-#include "lldb/Symbol/ObjectFile.h"
-#include "lldb/Symbol/FuncUnwinders.h"
-#include "lldb/Symbol/SymbolContext.h"
-#include "lldb/Symbol/DWARFCallFrameInfo.h"
#include "lldb/Symbol/ArmUnwindInfo.h"
#include "lldb/Symbol/CompactUnwindInfo.h"
+#include "lldb/Symbol/DWARFCallFrameInfo.h"
+#include "lldb/Symbol/FuncUnwinders.h"
+#include "lldb/Symbol/ObjectFile.h"
+#include "lldb/Symbol/SymbolContext.h"
// There is one UnwindTable object per ObjectFile.
-// It contains a list of Unwind objects -- one per function, populated lazily -- for the ObjectFile.
+// It contains a list of Unwind objects -- one per function, populated lazily --
+// for the ObjectFile.
// Each Unwind object has multiple UnwindPlans for different scenarios.
using namespace lldb;
using namespace lldb_private;
UnwindTable::UnwindTable(ObjectFile &objfile)
- : m_object_file(objfile),
- m_unwinds(),
- m_initialized(false),
- m_mutex(),
- m_eh_frame_up(),
- m_compact_unwind_up(),
- m_arm_unwind_up()
-{
-}
+ : m_object_file(objfile), m_unwinds(), m_initialized(false), m_mutex(),
+ m_eh_frame_up(), m_compact_unwind_up(), m_arm_unwind_up() {}
-// We can't do some of this initialization when the ObjectFile is running its ctor; delay doing it
+// We can't do some of this initialization when the ObjectFile is running its
+// ctor; delay doing it
// until needed for something.
-void
-UnwindTable::Initialize ()
-{
- if (m_initialized)
- return;
-
- std::lock_guard<std::mutex> guard(m_mutex);
-
- if (m_initialized) // check again once we've acquired the lock
- return;
-
- SectionList* sl = m_object_file.GetSectionList ();
- if (sl)
- {
- SectionSP sect = sl->FindSectionByType (eSectionTypeEHFrame, true);
- if (sect.get())
- {
- m_eh_frame_up.reset(new DWARFCallFrameInfo(m_object_file, sect, eRegisterKindEHFrame, true));
- }
- sect = sl->FindSectionByType (eSectionTypeCompactUnwind, true);
- if (sect.get())
- {
- m_compact_unwind_up.reset(new CompactUnwindInfo(m_object_file, sect));
- }
- sect = sl->FindSectionByType (eSectionTypeARMexidx, true);
- if (sect.get())
- {
- SectionSP sect_extab = sl->FindSectionByType (eSectionTypeARMextab, true);
- if (sect_extab.get())
- {
- m_arm_unwind_up.reset(new ArmUnwindInfo(m_object_file, sect, sect_extab));
- }
- }
+void UnwindTable::Initialize() {
+ if (m_initialized)
+ return;
+
+ std::lock_guard<std::mutex> guard(m_mutex);
+
+ if (m_initialized) // check again once we've acquired the lock
+ return;
+
+ SectionList *sl = m_object_file.GetSectionList();
+ if (sl) {
+ SectionSP sect = sl->FindSectionByType(eSectionTypeEHFrame, true);
+ if (sect.get()) {
+ m_eh_frame_up.reset(new DWARFCallFrameInfo(m_object_file, sect,
+ eRegisterKindEHFrame, true));
}
-
- m_initialized = true;
-}
+ sect = sl->FindSectionByType(eSectionTypeCompactUnwind, true);
+ if (sect.get()) {
+ m_compact_unwind_up.reset(new CompactUnwindInfo(m_object_file, sect));
+ }
+ sect = sl->FindSectionByType(eSectionTypeARMexidx, true);
+ if (sect.get()) {
+ SectionSP sect_extab = sl->FindSectionByType(eSectionTypeARMextab, true);
+ if (sect_extab.get()) {
+ m_arm_unwind_up.reset(
+ new ArmUnwindInfo(m_object_file, sect, sect_extab));
+ }
+ }
+ }
-UnwindTable::~UnwindTable ()
-{
+ m_initialized = true;
}
-FuncUnwindersSP
-UnwindTable::GetFuncUnwindersContainingAddress (const Address& addr, SymbolContext &sc)
-{
- FuncUnwindersSP no_unwind_found;
-
- Initialize();
-
- std::lock_guard<std::mutex> guard(m_mutex);
-
- // There is an UnwindTable per object file, so we can safely use file handles
- addr_t file_addr = addr.GetFileAddress();
- iterator end = m_unwinds.end ();
- iterator insert_pos = end;
- if (!m_unwinds.empty())
- {
- insert_pos = m_unwinds.lower_bound (file_addr);
- iterator pos = insert_pos;
- if ((pos == m_unwinds.end ()) || (pos != m_unwinds.begin() && pos->second->GetFunctionStartAddress() != addr))
- --pos;
-
- if (pos->second->ContainsAddress (addr))
- return pos->second;
- }
+UnwindTable::~UnwindTable() {}
- AddressRange range;
- if (!sc.GetAddressRange(eSymbolContextFunction | eSymbolContextSymbol, 0, false, range) || !range.GetBaseAddress().IsValid())
- {
- // Does the eh_frame unwind info has a function bounds for this addr?
- if (m_eh_frame_up == nullptr || !m_eh_frame_up->GetAddressRange (addr, range))
- {
- return no_unwind_found;
- }
+FuncUnwindersSP
+UnwindTable::GetFuncUnwindersContainingAddress(const Address &addr,
+ SymbolContext &sc) {
+ FuncUnwindersSP no_unwind_found;
+
+ Initialize();
+
+ std::lock_guard<std::mutex> guard(m_mutex);
+
+ // There is an UnwindTable per object file, so we can safely use file handles
+ addr_t file_addr = addr.GetFileAddress();
+ iterator end = m_unwinds.end();
+ iterator insert_pos = end;
+ if (!m_unwinds.empty()) {
+ insert_pos = m_unwinds.lower_bound(file_addr);
+ iterator pos = insert_pos;
+ if ((pos == m_unwinds.end()) ||
+ (pos != m_unwinds.begin() &&
+ pos->second->GetFunctionStartAddress() != addr))
+ --pos;
+
+ if (pos->second->ContainsAddress(addr))
+ return pos->second;
+ }
+
+ AddressRange range;
+ if (!sc.GetAddressRange(eSymbolContextFunction | eSymbolContextSymbol, 0,
+ false, range) ||
+ !range.GetBaseAddress().IsValid()) {
+ // Does the eh_frame unwind info has a function bounds for this addr?
+ if (m_eh_frame_up == nullptr ||
+ !m_eh_frame_up->GetAddressRange(addr, range)) {
+ return no_unwind_found;
}
-
- FuncUnwindersSP func_unwinder_sp(new FuncUnwinders(*this, range));
- m_unwinds.insert (insert_pos, std::make_pair(range.GetBaseAddress().GetFileAddress(), func_unwinder_sp));
-// StreamFile s(stdout, false);
-// Dump (s);
- return func_unwinder_sp;
+ }
+
+ FuncUnwindersSP func_unwinder_sp(new FuncUnwinders(*this, range));
+ m_unwinds.insert(insert_pos,
+ std::make_pair(range.GetBaseAddress().GetFileAddress(),
+ func_unwinder_sp));
+ // StreamFile s(stdout, false);
+ // Dump (s);
+ return func_unwinder_sp;
}
-// Ignore any existing FuncUnwinders for this function, create a new one and don't add it to the
-// UnwindTable. This is intended for use by target modules show-unwind where we want to create
+// Ignore any existing FuncUnwinders for this function, create a new one and
+// don't add it to the
+// UnwindTable. This is intended for use by target modules show-unwind where we
+// want to create
// new UnwindPlans, not re-use existing ones.
FuncUnwindersSP
-UnwindTable::GetUncachedFuncUnwindersContainingAddress (const Address& addr, SymbolContext &sc)
-{
- FuncUnwindersSP no_unwind_found;
- Initialize();
-
- AddressRange range;
- if (!sc.GetAddressRange(eSymbolContextFunction | eSymbolContextSymbol, 0, false, range) || !range.GetBaseAddress().IsValid())
- {
- // Does the eh_frame unwind info has a function bounds for this addr?
- if (m_eh_frame_up == nullptr || !m_eh_frame_up->GetAddressRange (addr, range))
- {
- return no_unwind_found;
- }
+UnwindTable::GetUncachedFuncUnwindersContainingAddress(const Address &addr,
+ SymbolContext &sc) {
+ FuncUnwindersSP no_unwind_found;
+ Initialize();
+
+ AddressRange range;
+ if (!sc.GetAddressRange(eSymbolContextFunction | eSymbolContextSymbol, 0,
+ false, range) ||
+ !range.GetBaseAddress().IsValid()) {
+ // Does the eh_frame unwind info has a function bounds for this addr?
+ if (m_eh_frame_up == nullptr ||
+ !m_eh_frame_up->GetAddressRange(addr, range)) {
+ return no_unwind_found;
}
+ }
- FuncUnwindersSP func_unwinder_sp(new FuncUnwinders(*this, range));
- return func_unwinder_sp;
+ FuncUnwindersSP func_unwinder_sp(new FuncUnwinders(*this, range));
+ return func_unwinder_sp;
}
-
-void
-UnwindTable::Dump (Stream &s)
-{
- std::lock_guard<std::mutex> guard(m_mutex);
- s.Printf("UnwindTable for '%s':\n", m_object_file.GetFileSpec().GetPath().c_str());
- const_iterator begin = m_unwinds.begin();
- const_iterator end = m_unwinds.end();
- for (const_iterator pos = begin; pos != end; ++pos)
- {
- s.Printf ("[%u] 0x%16.16" PRIx64 "\n", (unsigned)std::distance (begin, pos), pos->first);
- }
- s.EOL();
+void UnwindTable::Dump(Stream &s) {
+ std::lock_guard<std::mutex> guard(m_mutex);
+ s.Printf("UnwindTable for '%s':\n",
+ m_object_file.GetFileSpec().GetPath().c_str());
+ const_iterator begin = m_unwinds.begin();
+ const_iterator end = m_unwinds.end();
+ for (const_iterator pos = begin; pos != end; ++pos) {
+ s.Printf("[%u] 0x%16.16" PRIx64 "\n", (unsigned)std::distance(begin, pos),
+ pos->first);
+ }
+ s.EOL();
}
-DWARFCallFrameInfo *
-UnwindTable::GetEHFrameInfo ()
-{
- Initialize();
- return m_eh_frame_up.get();
+DWARFCallFrameInfo *UnwindTable::GetEHFrameInfo() {
+ Initialize();
+ return m_eh_frame_up.get();
}
-CompactUnwindInfo *
-UnwindTable::GetCompactUnwindInfo ()
-{
- Initialize();
- return m_compact_unwind_up.get();
+CompactUnwindInfo *UnwindTable::GetCompactUnwindInfo() {
+ Initialize();
+ return m_compact_unwind_up.get();
}
-ArmUnwindInfo *
-UnwindTable::GetArmUnwindInfo ()
-{
- Initialize();
- return m_arm_unwind_up.get();
+ArmUnwindInfo *UnwindTable::GetArmUnwindInfo() {
+ Initialize();
+ return m_arm_unwind_up.get();
}
-bool
-UnwindTable::GetArchitecture (lldb_private::ArchSpec &arch)
-{
- return m_object_file.GetArchitecture (arch);
+bool UnwindTable::GetArchitecture(lldb_private::ArchSpec &arch) {
+ return m_object_file.GetArchitecture(arch);
}
-bool
-UnwindTable::GetAllowAssemblyEmulationUnwindPlans ()
-{
- return m_object_file.AllowAssemblyEmulationUnwindPlans ();
+bool UnwindTable::GetAllowAssemblyEmulationUnwindPlans() {
+ return m_object_file.AllowAssemblyEmulationUnwindPlans();
}