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LibWasm+Everywhere: Make the instruction count limit configurable

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...and enable it for LibWeb and test-wasm.
Note that `wasm` will not be limited by this.
This commit is contained in:
Ali Mohammad Pur
2021-07-15 00:00:45 +04:30
parent 70b94f58b2
commit 65cd5526cb
6 changed files with 25 additions and 3 deletions
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9
Userland/Libraries/LibWasm/AbstractMachine/BytecodeInterpreter.cpp
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@@ -37,12 +37,15 @@ void BytecodeInterpreter::interpret(Configuration& configuration)
auto& instructions = configuration.frame().expression().instructions();
auto max_ip_value = InstructionPointer { instructions.size() };
auto& current_ip_value = configuration.ip();
auto const should_limit_instruction_count = configuration.should_limit_instruction_count();
u64 executed_instructions = 0;
while (current_ip_value < max_ip_value) {
if (executed_instructions++ >= Constants::max_allowed_executed_instructions_per_call) [[unlikely]] {
m_trap = Trap { "Exceeded maximum allowed number of instructions" };
return;
if (should_limit_instruction_count) {
if (executed_instructions++ >= Constants::max_allowed_executed_instructions_per_call) [[unlikely]] {
m_trap = Trap { "Exceeded maximum allowed number of instructions" };
return;
}
}
auto& instruction = instructions[current_ip_value.value()];
auto old_ip = current_ip_value;