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Add additional checks to make sure thread clean up callbacks are valid

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This commit is contained in:
Maschell 2023-07-15 13:11:31 +02:00
parent 64667d6169
commit 4b2480fda0
1 changed files with 47 additions and 1 deletions
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48
source/main.cpp
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@ -1,4 +1,6 @@
#include "PluginManagement.h"
#include "coreinit/interrupts.h"
#include "coreinit/scheduler.h"
#include "globals.h"
#include "hooks.h"
#include "patcher/hooks_patcher_static.h"
@ -53,6 +55,7 @@ WUMS_APPLICATION_ENDS() {
deinitLogging();
}
void CheckCleanupCallbackUsage(const std::vector<std::unique_ptr<PluginContainer>> &plugins);
WUMS_APPLICATION_STARTS() {
uint32_t upid = OSGetUPID();
@ -98,7 +101,23 @@ WUMS_APPLICATION_STARTS() {
}
if (!gLoadOnNextLaunch.empty()) {
auto *currentThread = OSGetCurrentThread();
auto saved_reent = currentThread->reserved[4];
auto saved_cleanupCallback = currentThread->cleanupCallback;
currentThread->reserved[4] = 0;
CallHook(gLoadedPlugins, WUPS_LOADER_HOOK_DEINIT_PLUGIN);
CheckCleanupCallbackUsage(gLoadedPlugins);
if (currentThread->cleanupCallback != saved_cleanupCallback) {
DEBUG_FUNCTION_LINE_WARN("WUPS_LOADER_HOOK_DEINIT_PLUGIN overwrote the ThreadCleanupCallback, we need to restore it!\n");
OSSetThreadCleanupCallback(OSGetCurrentThread(), saved_cleanupCallback);
}
currentThread->reserved[4] = saved_reent;
DEBUG_FUNCTION_LINE("Restore function patches of currently loaded plugins.");
PluginManagement::RestoreFunctionPatches(gLoadedPlugins);
DEBUG_FUNCTION_LINE("Unload existing plugins.");
@ -139,4 +158,31 @@ WUMS_APPLICATION_STARTS() {
CallHook(gLoadedPlugins, WUPS_LOADER_HOOK_APPLICATION_STARTS);
}
}
}
void CheckCleanupCallbackUsage(const std::vector<std::unique_ptr<PluginContainer>> &plugins) {
auto *curThread = OSGetCurrentThread();
for (const auto &cur : plugins) {
auto textSection = cur->getPluginInformation()->getSectionInfo(".text");
if (!textSection.has_value()) {
continue;
}
uint32_t startAddress = textSection.value()->getAddress();
uint32_t endAddress = textSection.value()->getAddress() + textSection.value()->getSize();
auto *pluginName = cur->getMetaInformation()->getName().c_str();
{
__OSLockScheduler(curThread);
int state = OSDisableInterrupts();
OSThread *t = *((OSThread **) 0x100567F8);
while (t) {
auto address = reinterpret_cast<uint32_t>(t->cleanupCallback);
if (address != 0 && address >= startAddress && address <= endAddress) {
OSReport("[WARN] PluginBackend: Thread 0x%08X is using a function from plugin %s for the threadCleanupCallback\n", t, pluginName);
}
t = t->activeLink.next;
}
OSRestoreInterrupts(state);
__OSUnlockScheduler(curThread);
}
}
}