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Thread.cpp: Fix game exit on access violation
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Browse source 
Fixes game closing in Twisted Metal.
This commit also aloows to debug such states by using cpu_flag::req_exit as a broker
This commit is contained in:
Elad 2026-03-24 19:47:32 +02:00
parent 4ced11e533
commit bb3e2689d4
7 changed files with 107 additions and 30 deletions
Download patch file Download diff file Expand all files Collapse all files

87
Utilities/Thread.cpp
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@ -107,7 +107,7 @@ thread_local u64 g_tls_fault_rsx = 0;
thread_local u64 g_tls_fault_spu = 0;
thread_local u64 g_tls_wait_time = 0;
thread_local u64 g_tls_wait_fail = 0;
thread_local bool g_tls_access_violation_recovered = false;
thread_local u64 g_tls_access_violation_recovered = umax;
extern thread_local std::string(*g_tls_log_prefix)();
namespace stx
@ -1269,7 +1269,7 @@ namespace rsx
extern std::function<bool(u32 addr, bool is_writing)> g_access_violation_handler;
}
bool handle_access_violation(u32 addr, bool is_writing, ucontext_t* context) noexcept
bool handle_access_violation(u32 addr, bool is_writing, bool is_exec, ucontext_t* context) noexcept
{
g_tls_fault_all++;
@ -1305,7 +1305,7 @@ bool handle_access_violation(u32 addr, bool is_writing, ucontext_t* context) noe
}
} spu_protection{cpu};
if (addr < RAW_SPU_BASE_ADDR && vm::check_addr(addr) && rsx::g_access_violation_handler)
if (!is_exec && addr < RAW_SPU_BASE_ADDR && vm::check_addr(addr) && rsx::g_access_violation_handler)
{
bool state_changed = false;
@ -1371,7 +1371,7 @@ bool handle_access_violation(u32 addr, bool is_writing, ucontext_t* context) noe
{
auto thread = idm::get_unlocked<named_thread<spu_thread>>(spu_thread::find_raw_spu((addr - RAW_SPU_BASE_ADDR) / RAW_SPU_OFFSET));
if (!thread)
if (!thread || is_exec)
{
break;
}
@ -1503,7 +1503,9 @@ bool handle_access_violation(u32 addr, bool is_writing, ucontext_t* context) noe
static_cast<void>(context);
#endif /* ARCH_ */
if (vm::check_addr(addr, is_writing ? vm::page_writable : vm::page_readable))
const auto required_page_perms = (is_writing ? vm::page_writable : vm::page_readable) + (is_exec ? vm::page_executable : 0);
if (vm::check_addr(addr, required_page_perms))
{
return true;
}
@ -1511,9 +1513,7 @@ bool handle_access_violation(u32 addr, bool is_writing, ucontext_t* context) noe
// Hack: allocate memory in case the emulator is stopping
const auto hack_alloc = [&]()
{
g_tls_access_violation_recovered = true;
if (vm::check_addr(addr, is_writing ? vm::page_writable : vm::page_readable))
if (vm::check_addr(addr, required_page_perms))
{
return true;
}
@ -1525,17 +1525,45 @@ bool handle_access_violation(u32 addr, bool is_writing, ucontext_t* context) noe
return false;
}
extern void ppu_register_range(u32 addr, u32 size);
bool reprotected = false;
if (vm::writer_lock mlock; area->flags & vm::preallocated || vm::check_addr(addr, 0))
{
// For allocated memory with protection lower than required (such as protection::no or read-only while writing to it)
utils::memory_protect(vm::base(addr & -0x1000), 0x1000, utils::protection::rw);
reprotected = true;
}
if (reprotected)
{
if (is_exec && !vm::check_addr(addr, vm::page_executable))
{
ppu_register_range(addr & -0x10000, 0x10000);
}
g_tls_access_violation_recovered = addr;
return true;
}
return area->falloc(addr & -0x10000, 0x10000) || vm::check_addr(addr, is_writing ? vm::page_writable : vm::page_readable);
const bool allocated = area->falloc(addr & -0x10000, 0x10000);
if (allocated)
{
if (is_exec && !vm::check_addr(addr, vm::page_executable))
{
ppu_register_range(addr & -0x10000, 0x10000);
}
g_tls_access_violation_recovered = addr;
return true;
}
return false;
};
if (cpu && (cpu->get_class() == thread_class::ppu || cpu->get_class() == thread_class::spu))
if (cpu && (cpu->get_class() == thread_class::ppu || cpu->get_class() == thread_class::spu) && !is_exec)
{
vm::temporary_unlock(*cpu);
u32 pf_port_id = 0;
@ -1678,7 +1706,7 @@ bool handle_access_violation(u32 addr, bool is_writing, ucontext_t* context) noe
if (cpu->get_class() == thread_class::spu)
{
if (!g_tls_access_violation_recovered)
if (g_tls_access_violation_recovered != addr)
{
vm_log.notice("\n%s", dump_useful_thread_info());
vm_log.always()("[%s] Access violation %s location 0x%x (%s)", cpu->get_name(), is_writing ? "writing" : "reading", addr, (is_writing && vm::check_addr(addr)) ? "read-only memory" : "unmapped memory");
@ -1714,10 +1742,10 @@ bool handle_access_violation(u32 addr, bool is_writing, ucontext_t* context) noe
// Note: a thread may access violate more than once after hack_alloc recovery
// Do not log any further access violations in this case.
if (!g_tls_access_violation_recovered)
if (g_tls_access_violation_recovered != addr)
{
vm_log.notice("\n%s", dump_useful_thread_info());
vm_log.fatal("Access violation %s location 0x%x (%s)", is_writing ? "writing" : (cpu && cpu->get_class() == thread_class::ppu && cpu->get_pc() == addr ? "executing" : "reading"), addr, (is_writing && vm::check_addr(addr)) ? "read-only memory" : "unmapped memory");
vm_log.fatal("Access violation %s location 0x%x (%s)", is_writing ? "writing" : (is_exec ? "executing" : "reading"), addr, (is_writing && vm::check_addr(addr)) ? "read-only memory" : "unmapped memory");
}
while (Emu.IsPausedOrReady())
@ -1766,8 +1794,13 @@ bool handle_access_violation(u32 addr, bool is_writing, ucontext_t* context) noe
}
}
if (Emu.IsStopped() && !hack_alloc())
if (Emu.IsStopped())
{
while (!hack_alloc())
{
thread_ctrl::wait_for(1000);
}
return false;
}
@ -1806,6 +1839,7 @@ static LONG exception_handler(PEXCEPTION_POINTERS pExp) noexcept
if (pExp->ExceptionRecord->ExceptionCode == EXCEPTION_ACCESS_VIOLATION && !is_executing)
{
u32 addr = 0;
bool is_exec = false;
if (auto [addr0, ok] = vm::try_get_addr(ptr); ok)
{
@ -1813,14 +1847,21 @@ static LONG exception_handler(PEXCEPTION_POINTERS pExp) noexcept
}
else if (const usz exec64 = (ptr - vm::g_exec_addr) / 2; exec64 <= u32{umax})
{
is_exec = true;
addr = static_cast<u32>(exec64);
}
else
else if (const usz exec64 = (ptr - vm::g_exec_addr - vm::g_exec_addr_seg_offset); exec64 <= u32{umax})
{
is_exec = true;
addr = static_cast<u32>(exec64);
}
else
{
std::this_thread::sleep_for(1ms);
return EXCEPTION_CONTINUE_SEARCH;
}
if (thread_ctrl::get_current() && handle_access_violation(addr, is_writing, pExp->ContextRecord))
if (thread_ctrl::get_current() && handle_access_violation(addr, is_writing, is_exec, pExp->ContextRecord))
{
return EXCEPTION_CONTINUE_EXECUTION;
}
@ -2027,12 +2068,13 @@ static void signal_handler(int /*sig*/, siginfo_t* info, void* uct) noexcept
#endif
const u64 exec64 = (reinterpret_cast<u64>(info->si_addr) - reinterpret_cast<u64>(vm::g_exec_addr)) / 2;
const u64 exec64_2 = (reinterpret_cast<u64>(info->si_addr) - reinterpret_cast<u64>(vm::g_exec_addr)) - vm::g_exec_addr_seg_offset;
const auto cause = is_executing ? "executing" : is_writing ? "writing" : "reading";
if (auto [addr, ok] = vm::try_get_addr(info->si_addr); ok && !is_executing)
{
// Try to process access violation
if (thread_ctrl::get_current() && handle_access_violation(addr, is_writing, context))
if (thread_ctrl::get_current() && handle_access_violation(addr, is_writing, false, context))
{
return;
}
@ -2040,7 +2082,14 @@ static void signal_handler(int /*sig*/, siginfo_t* info, void* uct) noexcept
if (exec64 < 0x100000000ull && !is_executing)
{
if (thread_ctrl::get_current() && handle_access_violation(static_cast<u32>(exec64), is_writing, context))
if (thread_ctrl::get_current() && handle_access_violation(static_cast<u32>(exec64), is_writing, true, context))
{
return;
}
}
else if (exec64_2 < 0x100000000ull && !is_executing)
{
if (thread_ctrl::get_current() && handle_access_violation(static_cast<u32>(exec64_2), is_writing, true, context))
{
return;
}
@ -2359,7 +2408,7 @@ thread_base::native_entry thread_base::finalize(u64 _self) noexcept
g_tls_fault_spu = 0;
g_tls_wait_time = 0;
g_tls_wait_fail = 0;
g_tls_access_violation_recovered = false;
g_tls_access_violation_recovered = umax;
g_tls_log_prefix = []() -> std::string { return {}; };