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Several SB API functions return strings using (char*, size_t) output arguments. During capture, we serialize an empty string for the char* because the memory can be uninitialized. During active replay, we have custom replay redirects that ensure that we don't override the buffer from which we're reading, but rather write to a buffer on the heap with the given length. This is sufficient for the active reproducer use case, where we only care about the side effects of the API calls, not the values actually returned. This approach does not not work for passive replay because here we ignore all the incoming arguments, and re-execute the current function with the arguments deserialized from the reproducer. This means that these function will update the deserialized copy of the arguments, rather than whatever was passed in by the SWIG wrapper. To solve this problem, this patch extends the reproducer instrumentation to handle this special case for passive replay. We nog ignore the replayer in the registry and the incoming char pointer, and instead reinvoke the current method on the deserialized class, and populate the output argument. Differential revision: https://reviews.llvm.org/D77759
224 lines
7.2 KiB
C++
224 lines
7.2 KiB
C++
//===-- SBFileSpec.cpp ----------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "lldb/API/SBFileSpec.h"
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#include "SBReproducerPrivate.h"
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#include "Utils.h"
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#include "lldb/API/SBStream.h"
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#include "lldb/Host/FileSystem.h"
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#include "lldb/Host/PosixApi.h"
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#include "lldb/Utility/FileSpec.h"
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#include "lldb/Utility/Stream.h"
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#include "llvm/ADT/SmallString.h"
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#include <inttypes.h>
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#include <limits.h>
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using namespace lldb;
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using namespace lldb_private;
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SBFileSpec::SBFileSpec() : m_opaque_up(new lldb_private::FileSpec()) {
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LLDB_RECORD_CONSTRUCTOR_NO_ARGS(SBFileSpec);
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}
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SBFileSpec::SBFileSpec(const SBFileSpec &rhs) : m_opaque_up() {
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LLDB_RECORD_CONSTRUCTOR(SBFileSpec, (const lldb::SBFileSpec &), rhs);
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m_opaque_up = clone(rhs.m_opaque_up);
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}
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SBFileSpec::SBFileSpec(const lldb_private::FileSpec &fspec)
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: m_opaque_up(new lldb_private::FileSpec(fspec)) {}
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// Deprecated!!!
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SBFileSpec::SBFileSpec(const char *path) : m_opaque_up(new FileSpec(path)) {
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LLDB_RECORD_CONSTRUCTOR(SBFileSpec, (const char *), path);
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FileSystem::Instance().Resolve(*m_opaque_up);
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}
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SBFileSpec::SBFileSpec(const char *path, bool resolve)
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: m_opaque_up(new FileSpec(path)) {
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LLDB_RECORD_CONSTRUCTOR(SBFileSpec, (const char *, bool), path, resolve);
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if (resolve)
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FileSystem::Instance().Resolve(*m_opaque_up);
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}
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SBFileSpec::~SBFileSpec() = default;
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const SBFileSpec &SBFileSpec::operator=(const SBFileSpec &rhs) {
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LLDB_RECORD_METHOD(const lldb::SBFileSpec &,
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SBFileSpec, operator=,(const lldb::SBFileSpec &), rhs);
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if (this != &rhs)
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m_opaque_up = clone(rhs.m_opaque_up);
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return LLDB_RECORD_RESULT(*this);
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}
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bool SBFileSpec::operator==(const SBFileSpec &rhs) const {
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LLDB_RECORD_METHOD_CONST(bool, SBFileSpec, operator==,(const SBFileSpec &rhs),
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rhs);
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return ref() == rhs.ref();
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}
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bool SBFileSpec::operator!=(const SBFileSpec &rhs) const {
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LLDB_RECORD_METHOD_CONST(bool, SBFileSpec, operator!=,(const SBFileSpec &rhs),
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rhs);
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return !(*this == rhs);
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}
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bool SBFileSpec::IsValid() const {
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LLDB_RECORD_METHOD_CONST_NO_ARGS(bool, SBFileSpec, IsValid);
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return this->operator bool();
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}
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SBFileSpec::operator bool() const {
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LLDB_RECORD_METHOD_CONST_NO_ARGS(bool, SBFileSpec, operator bool);
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return m_opaque_up->operator bool();
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}
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bool SBFileSpec::Exists() const {
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LLDB_RECORD_METHOD_CONST_NO_ARGS(bool, SBFileSpec, Exists);
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return FileSystem::Instance().Exists(*m_opaque_up);
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}
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bool SBFileSpec::ResolveExecutableLocation() {
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LLDB_RECORD_METHOD_NO_ARGS(bool, SBFileSpec, ResolveExecutableLocation);
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return FileSystem::Instance().ResolveExecutableLocation(*m_opaque_up);
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}
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int SBFileSpec::ResolvePath(const char *src_path, char *dst_path,
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size_t dst_len) {
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LLDB_RECORD_STATIC_METHOD(int, SBFileSpec, ResolvePath,
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(const char *, char *, size_t), src_path, dst_path,
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dst_len);
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llvm::SmallString<64> result(src_path);
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FileSystem::Instance().Resolve(result);
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::snprintf(dst_path, dst_len, "%s", result.c_str());
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return std::min(dst_len - 1, result.size());
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}
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const char *SBFileSpec::GetFilename() const {
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LLDB_RECORD_METHOD_CONST_NO_ARGS(const char *, SBFileSpec, GetFilename);
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return m_opaque_up->GetFilename().AsCString();
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}
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const char *SBFileSpec::GetDirectory() const {
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LLDB_RECORD_METHOD_CONST_NO_ARGS(const char *, SBFileSpec, GetDirectory);
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FileSpec directory{*m_opaque_up};
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directory.GetFilename().Clear();
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return directory.GetCString();
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}
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void SBFileSpec::SetFilename(const char *filename) {
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LLDB_RECORD_METHOD(void, SBFileSpec, SetFilename, (const char *), filename);
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if (filename && filename[0])
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m_opaque_up->GetFilename().SetCString(filename);
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else
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m_opaque_up->GetFilename().Clear();
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}
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void SBFileSpec::SetDirectory(const char *directory) {
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LLDB_RECORD_METHOD(void, SBFileSpec, SetDirectory, (const char *), directory);
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if (directory && directory[0])
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m_opaque_up->GetDirectory().SetCString(directory);
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else
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m_opaque_up->GetDirectory().Clear();
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}
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uint32_t SBFileSpec::GetPath(char *dst_path, size_t dst_len) const {
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LLDB_RECORD_CHAR_PTR_METHOD_CONST(uint32_t, SBFileSpec, GetPath,
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(char *, size_t), dst_path, "", dst_len);
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uint32_t result = m_opaque_up->GetPath(dst_path, dst_len);
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if (result == 0 && dst_path && dst_len > 0)
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*dst_path = '\0';
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return result;
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}
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const lldb_private::FileSpec *SBFileSpec::operator->() const {
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return m_opaque_up.get();
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}
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const lldb_private::FileSpec *SBFileSpec::get() const {
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return m_opaque_up.get();
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}
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const lldb_private::FileSpec &SBFileSpec::operator*() const {
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return *m_opaque_up;
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}
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const lldb_private::FileSpec &SBFileSpec::ref() const { return *m_opaque_up; }
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void SBFileSpec::SetFileSpec(const lldb_private::FileSpec &fs) {
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*m_opaque_up = fs;
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}
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bool SBFileSpec::GetDescription(SBStream &description) const {
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LLDB_RECORD_METHOD_CONST(bool, SBFileSpec, GetDescription, (lldb::SBStream &),
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description);
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Stream &strm = description.ref();
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char path[PATH_MAX];
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if (m_opaque_up->GetPath(path, sizeof(path)))
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strm.PutCString(path);
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return true;
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}
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void SBFileSpec::AppendPathComponent(const char *fn) {
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LLDB_RECORD_METHOD(void, SBFileSpec, AppendPathComponent, (const char *), fn);
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m_opaque_up->AppendPathComponent(fn);
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}
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namespace lldb_private {
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namespace repro {
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template <>
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void RegisterMethods<SBFileSpec>(Registry &R) {
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LLDB_REGISTER_CONSTRUCTOR(SBFileSpec, ());
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LLDB_REGISTER_CONSTRUCTOR(SBFileSpec, (const lldb::SBFileSpec &));
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LLDB_REGISTER_CONSTRUCTOR(SBFileSpec, (const char *));
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LLDB_REGISTER_CONSTRUCTOR(SBFileSpec, (const char *, bool));
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LLDB_REGISTER_METHOD(const lldb::SBFileSpec &,
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SBFileSpec, operator=,(const lldb::SBFileSpec &));
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LLDB_REGISTER_METHOD_CONST(bool,
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SBFileSpec, operator==,(const lldb::SBFileSpec &));
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LLDB_REGISTER_METHOD_CONST(bool,
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SBFileSpec, operator!=,(const lldb::SBFileSpec &));
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LLDB_REGISTER_METHOD_CONST(bool, SBFileSpec, IsValid, ());
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LLDB_REGISTER_METHOD_CONST(bool, SBFileSpec, operator bool, ());
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LLDB_REGISTER_METHOD_CONST(bool, SBFileSpec, Exists, ());
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LLDB_REGISTER_METHOD(bool, SBFileSpec, ResolveExecutableLocation, ());
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LLDB_REGISTER_STATIC_METHOD(int, SBFileSpec, ResolvePath,
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(const char *, char *, size_t));
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LLDB_REGISTER_METHOD_CONST(const char *, SBFileSpec, GetFilename, ());
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LLDB_REGISTER_METHOD_CONST(const char *, SBFileSpec, GetDirectory, ());
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LLDB_REGISTER_METHOD(void, SBFileSpec, SetFilename, (const char *));
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LLDB_REGISTER_METHOD(void, SBFileSpec, SetDirectory, (const char *));
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LLDB_REGISTER_METHOD_CONST(bool, SBFileSpec, GetDescription,
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(lldb::SBStream &));
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LLDB_REGISTER_METHOD(void, SBFileSpec, AppendPathComponent, (const char *));
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LLDB_REGISTER_CHAR_PTR_METHOD_CONST(uint32_t, SBFileSpec, GetPath);
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}
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}
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}
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