From 8b81f41e52b55835aaaa7e4962af23a00188cbdc Mon Sep 17 00:00:00 2001
From: Vaxry <43317083+vaxerski@users.noreply.github.com>
Date: Mon, 27 Feb 2023 12:32:38 +0000
Subject: Plugin System (#1590)

---------

Co-authored-by: Mihai Fufezan <fufexan@protonmail.com>
---
 src/managers/HookSystemManager.cpp | 57 ++++++++++++++++++++++++++++++--------
 1 file changed, 46 insertions(+), 11 deletions(-)

(limited to 'src/managers/HookSystemManager.cpp')

diff --git a/src/managers/HookSystemManager.cpp b/src/managers/HookSystemManager.cpp
index 02775a24..c5e4cdd8 100644
--- a/src/managers/HookSystemManager.cpp
+++ b/src/managers/HookSystemManager.cpp
@@ -1,44 +1,79 @@
 #include "HookSystemManager.hpp"
 
+#include "../plugins/PluginSystem.hpp"
+
 CHookSystemManager::CHookSystemManager() {
     ; //
 }
 
 // returns the pointer to the function
-HOOK_CALLBACK_FN* CHookSystemManager::hookDynamic(const std::string& event, HOOK_CALLBACK_FN fn) {
+HOOK_CALLBACK_FN* CHookSystemManager::hookDynamic(const std::string& event, HOOK_CALLBACK_FN fn, HANDLE handle) {
     const auto PVEC = getVecForEvent(event);
     const auto PFN  = &m_lCallbackFunctions.emplace_back(fn);
-    PVEC->emplace_back(PFN);
+    PVEC->emplace_back(SCallbackFNPtr{PFN, handle});
     return PFN;
 }
 
-void CHookSystemManager::hookStatic(const std::string& event, HOOK_CALLBACK_FN* fn) {
+void CHookSystemManager::hookStatic(const std::string& event, HOOK_CALLBACK_FN* fn, HANDLE handle) {
     const auto PVEC = getVecForEvent(event);
-    PVEC->emplace_back(fn);
+    PVEC->emplace_back(SCallbackFNPtr{fn, handle});
 }
 
 void CHookSystemManager::unhook(HOOK_CALLBACK_FN* fn) {
     std::erase_if(m_lCallbackFunctions, [&](const auto& other) { return &other == fn; });
     for (auto& [k, v] : m_lpRegisteredHooks) {
-        std::erase_if(v, [&](const auto& other) { return other == fn; });
+        std::erase_if(v, [&](const auto& other) { return other.fn == fn; });
     }
 }
 
-void CHookSystemManager::emit(const std::vector<HOOK_CALLBACK_FN*>* callbacks, std::any data) {
+void CHookSystemManager::emit(const std::vector<SCallbackFNPtr>* callbacks, std::any data) {
     if (callbacks->empty())
         return;
 
-    for (auto& cb : *callbacks)
-        (*cb)(cb, data);
+    std::vector<HANDLE> faultyHandles;
+
+    for (auto& cb : *callbacks) {
+
+        m_bCurrentEventPlugin = false;
+
+        if (!cb.handle) {
+            // we don't guard hl hooks
+            (*cb.fn)(cb.fn, data);
+            continue;
+        }
+
+        m_bCurrentEventPlugin = true;
+
+        if (std::find(faultyHandles.begin(), faultyHandles.end(), cb.handle) != faultyHandles.end())
+            continue;
+
+        try {
+            if (!setjmp(m_jbHookFaultJumpBuf))
+                (*cb.fn)(cb.fn, data);
+            else {
+                // this module crashed.
+                throw std::exception();
+            }
+        } catch (std::exception& e) {
+            // TODO: this works only once...?
+            faultyHandles.push_back(cb.handle);
+            Debug::log(ERR, " [hookSystem] Hook from plugin %lx caused a SIGSEGV, queueing for unloading.", cb.handle);
+        }
+    }
+
+    if (!faultyHandles.empty()) {
+        for (auto& h : faultyHandles)
+            g_pPluginSystem->unloadPlugin(g_pPluginSystem->getPluginByHandle(h), true);
+    }
 }
 
-std::vector<HOOK_CALLBACK_FN*>* CHookSystemManager::getVecForEvent(const std::string& event) {
+std::vector<SCallbackFNPtr>* CHookSystemManager::getVecForEvent(const std::string& event) {
     auto IT = std::find_if(m_lpRegisteredHooks.begin(), m_lpRegisteredHooks.end(), [&](const auto& other) { return other.first == event; });
 
     if (IT != m_lpRegisteredHooks.end())
         return &IT->second;
 
-    Debug::log(LOG, "[hookSystem] New hook event registered: %s", event.c_str());
+    Debug::log(LOG, " [hookSystem] New hook event registered: %s", event.c_str());
 
-    return &m_lpRegisteredHooks.emplace_back(std::make_pair<>(event, std::vector<HOOK_CALLBACK_FN*>{})).second;
+    return &m_lpRegisteredHooks.emplace_back(std::make_pair<>(event, std::vector<SCallbackFNPtr>{})).second;
 }
\ No newline at end of file
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