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/*
* Copyright (c) 2018-2021, Andreas Kling <kling@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include "Process.h"
namespace Profiler {
Thread* Process::find_thread(pid_t tid, EventSerialNumber serial)
{
auto it = threads.find(tid);
if (it == threads.end())
return nullptr;
for (auto& thread : it->value) {
if (thread.start_valid < serial && (thread.end_valid == EventSerialNumber {} || thread.end_valid > serial))
return &thread;
}
return nullptr;
}
void Process::handle_thread_create(pid_t tid, EventSerialNumber serial)
{
auto it = threads.find(tid);
if (it == threads.end()) {
threads.set(tid, {});
it = threads.find(tid);
}
auto thread = Thread { tid, serial, {} };
it->value.append(move(thread));
}
void Process::handle_thread_exit(pid_t tid, EventSerialNumber serial)
{
auto* thread = find_thread(tid, serial);
if (!thread)
return;
thread->end_valid = serial;
}
HashMap<String, OwnPtr<MappedObject>> g_mapped_object_cache;
static MappedObject* get_or_create_mapped_object(const String& path)
{
if (auto it = g_mapped_object_cache.find(path); it != g_mapped_object_cache.end())
return it->value.ptr();
auto file_or_error = MappedFile::map(path);
if (file_or_error.is_error()) {
g_mapped_object_cache.set(path, {});
return nullptr;
}
auto elf = ELF::Image(file_or_error.value()->bytes());
if (!elf.is_valid()) {
g_mapped_object_cache.set(path, {});
return nullptr;
}
auto new_mapped_object = adopt_own(*new MappedObject {
.file = file_or_error.release_value(),
.elf = elf,
});
auto* ptr = new_mapped_object.ptr();
g_mapped_object_cache.set(path, move(new_mapped_object));
return ptr;
}
void LibraryMetadata::handle_mmap(FlatPtr base, size_t size, const String& name)
{
String path;
if (name.contains("Loader.so"))
path = "Loader.so";
else if (!name.contains(":"))
return;
else
path = name.substring(0, name.view().find_first_of(":").value());
String full_path;
if (name.contains(".so"))
full_path = String::formatted("/usr/lib/{}", path);
else
full_path = path;
auto* mapped_object = get_or_create_mapped_object(full_path);
if (!mapped_object) {
full_path = String::formatted("/usr/local/lib/{}", path);
mapped_object = get_or_create_mapped_object(full_path);
if (!mapped_object)
return;
}
FlatPtr text_base {};
mapped_object->elf.for_each_program_header([&](const ELF::Image::ProgramHeader& ph) {
if (ph.is_executable())
text_base = ph.vaddr().get();
return IterationDecision::Continue;
});
m_libraries.set(name, adopt_own(*new Library { base, size, name, text_base, mapped_object }));
}
String LibraryMetadata::Library::symbolicate(FlatPtr ptr, u32* offset) const
{
if (!object)
return String::formatted("?? <{:p}>", ptr);
return object->elf.symbolicate(ptr - base + text_base, offset);
}
const LibraryMetadata::Library* LibraryMetadata::library_containing(FlatPtr ptr) const
{
for (auto& it : m_libraries) {
auto& library = *it.value;
if (ptr >= library.base && ptr < (library.base + library.size))
return &library;
}
return nullptr;
}
}
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