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/* |
/* |
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* Copyright (c) 2014 - 2016 Christian Schoenebeck |
* Copyright (c) 2014 - 2019 Christian Schoenebeck |
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* |
* |
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* http://www.linuxsampler.org |
* http://www.linuxsampler.org |
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* |
* |
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|
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#define DEBUG_SCRIPTVM_CORE 0 |
#define DEBUG_SCRIPTVM_CORE 0 |
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/** |
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* Maximum amount of VM instructions to be executed per ScriptVM::exec() call |
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* in case loops are involved, before the script got automatically suspended |
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* for a certain amount of time to avoid any RT instability issues. |
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* |
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* The following value takes a max. execution time of 300 microseconds as aimed |
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* target, assuming an execution time of approximately 5 microseconds per |
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* instruction this leads to the very approximate value set below. |
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*/ |
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#define SCRIPTVM_MAX_INSTR_PER_CYCLE_SOFT 70 |
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|
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/** |
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* Absolute maximum amount of VM instructions to be executed per |
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* ScriptVM::exec() call (even if no loops are involved), before the script got |
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* automatically suspended for a certain amount of time to avoid any RT |
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* instability issues. |
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* |
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* A distinction between "soft" and "hard" limit is done here ATM because a |
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* script author typically expects that his script might be interrupted |
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* automatically if he is using while() loops, however he might not be |
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* prepared that his script might also be interrupted if no loop is involved |
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* (i.e. on very large scripts). |
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* |
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* The following value takes a max. execution time of 1000 microseconds as |
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* aimed target, assuming an execution time of approximately 5 microseconds per |
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* instruction this leads to the very approximate value set below. |
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*/ |
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#define SCRIPTVM_MAX_INSTR_PER_CYCLE_HARD 210 |
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/** |
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* In case either SCRIPTVM_MAX_INSTR_PER_CYCLE_SOFT or |
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* SCRIPTVM_MAX_INSTR_PER_CYCLE_HARD was exceeded when calling |
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* ScriptVM::exec() : the amount of microseconds the respective script |
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* execution instance should be automatically suspended by the VM. |
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*/ |
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#define SCRIPT_VM_FORCE_SUSPENSION_MICROSECONDS 1000 |
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|
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int InstrScript_parse(LinuxSampler::ParserContext*); |
int InstrScript_parse(LinuxSampler::ParserContext*); |
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namespace LinuxSampler { |
namespace LinuxSampler { |
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#if DEBUG_SCRIPTVM_CORE |
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static void _printIndents(int n) { |
static void _printIndents(int n) { |
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for (int i = 0; i < n; ++i) printf(" "); |
for (int i = 0; i < n; ++i) printf(" "); |
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fflush(stdout); |
fflush(stdout); |
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} |
} |
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#endif |
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|
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static int _requiredMaxStackSizeFor(Statement* statement, int depth = 0) { |
static vmint _requiredMaxStackSizeFor(Statement* statement, vmint depth = 0) { |
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if (!statement) return 1; |
if (!statement) return 1; |
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|
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switch (statement->statementType()) { |
switch (statement->statementType()) { |
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printf("-> STMT_LIST\n"); |
printf("-> STMT_LIST\n"); |
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#endif |
#endif |
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Statements* stmts = (Statements*) statement; |
Statements* stmts = (Statements*) statement; |
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int max = 0; |
vmint max = 0; |
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for (int i = 0; stmts->statement(i); ++i) { |
for (int i = 0; stmts->statement(i); ++i) { |
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int size = _requiredMaxStackSizeFor( stmts->statement(i), depth+1 ); |
vmint size = _requiredMaxStackSizeFor( stmts->statement(i), depth+1 ); |
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if (max < size) max = size; |
if (max < size) max = size; |
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} |
} |
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return max + 1; |
return max + 1; |
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printf("-> STMT_BRANCH\n"); |
printf("-> STMT_BRANCH\n"); |
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#endif |
#endif |
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BranchStatement* branchStmt = (BranchStatement*) statement; |
BranchStatement* branchStmt = (BranchStatement*) statement; |
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int max = 0; |
vmint max = 0; |
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for (int i = 0; branchStmt->branch(i); ++i) { |
for (int i = 0; branchStmt->branch(i); ++i) { |
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int size = _requiredMaxStackSizeFor( branchStmt->branch(i), depth+1 ); |
vmint size = _requiredMaxStackSizeFor( branchStmt->branch(i), depth+1 ); |
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if (max < size) max = size; |
if (max < size) max = size; |
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} |
} |
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return max + 1; |
return max + 1; |
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else |
else |
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return 1; |
return 1; |
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} |
} |
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case STMT_SYNC: { |
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#if DEBUG_SCRIPTVM_CORE |
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_printIndents(depth); |
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printf("-> STMT_SYNC\n"); |
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#endif |
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SyncBlock* syncStmt = (SyncBlock*) statement; |
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if (syncStmt->statements()) |
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return _requiredMaxStackSizeFor( syncStmt->statements() ) + 1; |
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else |
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return 1; |
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} |
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case STMT_NOOP: |
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break; // no operation like the name suggests |
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} |
} |
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|
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return 1; // actually just to avoid compiler warning |
return 1; // actually just to avoid compiler warning |
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} |
} |
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|
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static int _requiredMaxStackSizeFor(EventHandlers* handlers) { |
static vmint _requiredMaxStackSizeFor(EventHandlers* handlers) { |
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int max = 1; |
vmint max = 1; |
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for (int i = 0; i < handlers->size(); ++i) { |
for (int i = 0; i < handlers->size(); ++i) { |
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int size = _requiredMaxStackSizeFor(handlers->eventHandler(i)); |
vmint size = _requiredMaxStackSizeFor(handlers->eventHandler(i)); |
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if (max < size) max = size; |
if (max < size) max = size; |
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} |
} |
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return max; |
return max; |
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} |
} |
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|
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ScriptVM::ScriptVM() : m_eventHandler(NULL), m_parserContext(NULL) { |
ScriptVM::ScriptVM() : |
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m_eventHandler(NULL), m_parserContext(NULL), m_autoSuspend(true), |
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m_acceptExitRes(false) |
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{ |
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m_fnMessage = new CoreVMFunction_message; |
m_fnMessage = new CoreVMFunction_message; |
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m_fnExit = new CoreVMFunction_exit; |
m_fnExit = new CoreVMFunction_exit(this); |
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m_fnWait = new CoreVMFunction_wait(this); |
m_fnWait = new CoreVMFunction_wait(this); |
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m_fnAbs = new CoreVMFunction_abs; |
m_fnAbs = new CoreVMFunction_abs; |
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m_fnRandom = new CoreVMFunction_random; |
m_fnRandom = new CoreVMFunction_random; |
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m_fnNumElements = new CoreVMFunction_num_elements; |
m_fnNumElements = new CoreVMFunction_num_elements; |
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m_fnInc = new CoreVMFunction_inc; |
m_fnInc = new CoreVMFunction_inc; |
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m_fnDec = new CoreVMFunction_dec; |
m_fnDec = new CoreVMFunction_dec; |
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m_fnInRange = new CoreVMFunction_in_range; |
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m_varRealTimer = new CoreVMDynVar_NKSP_REAL_TIMER; |
m_varRealTimer = new CoreVMDynVar_NKSP_REAL_TIMER; |
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m_varPerfTimer = new CoreVMDynVar_NKSP_PERF_TIMER; |
m_varPerfTimer = new CoreVMDynVar_NKSP_PERF_TIMER; |
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m_fnShLeft = new CoreVMFunction_sh_left; |
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m_fnShRight = new CoreVMFunction_sh_right; |
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m_fnMin = new CoreVMFunction_min; |
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m_fnMax = new CoreVMFunction_max; |
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m_fnArrayEqual = new CoreVMFunction_array_equal; |
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m_fnSearch = new CoreVMFunction_search; |
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m_fnSort = new CoreVMFunction_sort; |
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m_fnIntToReal = new CoreVMFunction_int_to_real; |
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m_fnRealToInt = new CoreVMFunction_real_to_int; |
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} |
} |
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ScriptVM::~ScriptVM() { |
ScriptVM::~ScriptVM() { |
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delete m_fnNumElements; |
delete m_fnNumElements; |
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delete m_fnInc; |
delete m_fnInc; |
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delete m_fnDec; |
delete m_fnDec; |
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delete m_fnInRange; |
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delete m_fnShLeft; |
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delete m_fnShRight; |
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delete m_fnMin; |
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delete m_fnMax; |
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delete m_fnArrayEqual; |
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delete m_fnSearch; |
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delete m_fnSort; |
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delete m_fnIntToReal; |
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delete m_fnRealToInt; |
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delete m_varRealTimer; |
delete m_varRealTimer; |
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delete m_varPerfTimer; |
delete m_varPerfTimer; |
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} |
} |
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context->createScanner(is); |
context->createScanner(is); |
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|
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InstrScript_parse(context); |
InstrScript_parse(context); |
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dmsg(2,("Allocating %ld bytes of global int VM memory.\n", long(context->globalIntVarCount * sizeof(int)))); |
dmsg(2,("Allocating %lld bytes of global int VM memory.\n", context->globalIntVarCount * sizeof(vmint))); |
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dmsg(2,("Allocating %d of global VM string variables.\n", context->globalStrVarCount)); |
dmsg(2,("Allocating %lld of global VM string variables.\n", context->globalStrVarCount)); |
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if (!context->globalIntMemory) |
if (!context->globalIntMemory) |
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context->globalIntMemory = new ArrayList<int>(); |
context->globalIntMemory = new ArrayList<vmint>(); |
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if (!context->globalRealMemory) |
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context->globalRealMemory = new ArrayList<vmfloat>(); |
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if (!context->globalStrMemory) |
if (!context->globalStrMemory) |
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context->globalStrMemory = new ArrayList<String>(); |
context->globalStrMemory = new ArrayList<String>(); |
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context->globalIntMemory->resize(context->globalIntVarCount); |
context->globalIntMemory->resize(context->globalIntVarCount); |
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memset(&((*context->globalIntMemory)[0]), 0, context->globalIntVarCount * sizeof(int)); |
context->globalRealMemory->resize(context->globalRealVarCount); |
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memset(&((*context->globalIntMemory)[0]), 0, context->globalIntVarCount * sizeof(vmint)); |
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memset(&((*context->globalRealMemory)[0]), 0, context->globalRealVarCount * sizeof(vmfloat)); |
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context->globalStrMemory->resize(context->globalStrVarCount); |
context->globalStrMemory->resize(context->globalStrVarCount); |
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return; |
return; |
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} |
} |
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if (!ctx->globalIntMemory) { |
if (!ctx->globalIntMemory) { |
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std::cerr << "Internal error: no global memory assigend to script VM.\n"; |
std::cerr << "Internal error: no global integer memory assigend to script VM.\n"; |
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return; |
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} |
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if (!ctx->globalRealMemory) { |
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std::cerr << "Internal error: no global real number memory assigend to script VM.\n"; |
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return; |
return; |
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} |
} |
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ctx->handlers->dump(); |
ctx->handlers->dump(); |
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_requiredMaxStackSizeFor(&*parserCtx->handlers); |
_requiredMaxStackSizeFor(&*parserCtx->handlers); |
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} |
} |
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execCtx->stack.resize(parserCtx->requiredMaxStackSize); |
execCtx->stack.resize(parserCtx->requiredMaxStackSize); |
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dmsg(2,("Created VM exec context with %ld bytes VM stack size.\n", |
dmsg(2,("Created VM exec context with %lld bytes VM stack size.\n", |
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long(parserCtx->requiredMaxStackSize * sizeof(ExecContext::StackFrame)))); |
parserCtx->requiredMaxStackSize * sizeof(ExecContext::StackFrame))); |
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//printf("execCtx=0x%lx\n", (uint64_t)execCtx); |
//printf("execCtx=0x%lx\n", (uint64_t)execCtx); |
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const int polySize = parserCtx->polyphonicIntVarCount; |
const vmint polySize = parserCtx->polyphonicIntVarCount; |
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execCtx->polyphonicIntMemory.resize(polySize); |
execCtx->polyphonicIntMemory.resize(polySize); |
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memset(&execCtx->polyphonicIntMemory[0], 0, polySize * sizeof(int)); |
memset(&execCtx->polyphonicIntMemory[0], 0, polySize * sizeof(vmint)); |
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dmsg(2,("Allocated %ld bytes polyphonic memory.\n", long(polySize * sizeof(int)))); |
dmsg(2,("Allocated %lld bytes polyphonic memory.\n", polySize * sizeof(vmint))); |
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return execCtx; |
return execCtx; |
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} |
} |
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|
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} |
} |
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|
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std::vector<VMSourceToken> ScriptVM::syntaxHighlighting(std::istream* is) { |
std::vector<VMSourceToken> ScriptVM::syntaxHighlighting(std::istream* is) { |
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NkspScanner scanner(is); |
try { |
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std::vector<SourceToken> tokens = scanner.tokens(); |
NkspScanner scanner(is); |
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std::vector<VMSourceToken> result; |
std::vector<SourceToken> tokens = scanner.tokens(); |
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result.resize(tokens.size()); |
std::vector<VMSourceToken> result; |
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for (int i = 0; i < tokens.size(); ++i) { |
result.resize(tokens.size()); |
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SourceToken* st = new SourceToken; |
for (vmint i = 0; i < tokens.size(); ++i) { |
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*st = tokens[i]; |
SourceToken* st = new SourceToken; |
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result[i] = VMSourceToken(st); |
*st = tokens[i]; |
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result[i] = VMSourceToken(st); |
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} |
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return result; |
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} catch (...) { |
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return std::vector<VMSourceToken>(); |
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} |
} |
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return result; |
|
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} |
} |
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VMFunction* ScriptVM::functionByName(const String& name) { |
VMFunction* ScriptVM::functionByName(const String& name) { |
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else if (name == "num_elements") return m_fnNumElements; |
else if (name == "num_elements") return m_fnNumElements; |
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else if (name == "inc") return m_fnInc; |
else if (name == "inc") return m_fnInc; |
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else if (name == "dec") return m_fnDec; |
else if (name == "dec") return m_fnDec; |
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else if (name == "in_range") return m_fnInRange; |
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else if (name == "sh_left") return m_fnShLeft; |
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else if (name == "sh_right") return m_fnShRight; |
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else if (name == "min") return m_fnMin; |
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else if (name == "max") return m_fnMax; |
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else if (name == "array_equal") return m_fnArrayEqual; |
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else if (name == "search") return m_fnSearch; |
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else if (name == "sort") return m_fnSort; |
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else if (name == "int_to_real") return m_fnIntToReal; |
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else if (name == "real") return m_fnIntToReal; |
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else if (name == "real_to_int") return m_fnRealToInt; |
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else if (name == "int") return m_fnRealToInt; |
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return NULL; |
return NULL; |
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} |
} |
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|
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std::map<String,VMIntRelPtr*> ScriptVM::builtInIntVariables() { |
bool ScriptVM::isFunctionDisabled(VMFunction* fn, VMParserContext* ctx) { |
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return std::map<String,VMIntRelPtr*>(); |
ParserContext* parserCtx = dynamic_cast<ParserContext*>(ctx); |
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if (!parserCtx) return false; |
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if (fn == m_fnMessage && parserCtx->userPreprocessorConditions.count("NKSP_NO_MESSAGE")) |
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return true; |
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return false; |
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} |
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std::map<String,VMIntPtr*> ScriptVM::builtInIntVariables() { |
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return std::map<String,VMIntPtr*>(); |
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} |
} |
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|
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std::map<String,VMInt8Array*> ScriptVM::builtInIntArrayVariables() { |
std::map<String,VMInt8Array*> ScriptVM::builtInIntArrayVariables() { |
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return m; |
return m; |
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} |
} |
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|
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std::map<String,int> ScriptVM::builtInConstIntVariables() { |
std::map<String,vmint> ScriptVM::builtInConstIntVariables() { |
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return std::map<String,int>(); |
std::map<String,vmint> m; |
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|
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m["$NI_CB_TYPE_INIT"] = VM_EVENT_HANDLER_INIT; |
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m["$NI_CB_TYPE_NOTE"] = VM_EVENT_HANDLER_NOTE; |
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m["$NI_CB_TYPE_RELEASE"] = VM_EVENT_HANDLER_RELEASE; |
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m["$NI_CB_TYPE_CONTROLLER"] = VM_EVENT_HANDLER_CONTROLLER; |
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|
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return m; |
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} |
} |
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|
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VMEventHandler* ScriptVM::currentVMEventHandler() { |
VMEventHandler* ScriptVM::currentVMEventHandler() { |
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return m_parserContext->execContext; |
return m_parserContext->execContext; |
372 |
} |
} |
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|
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void ScriptVM::setAutoSuspendEnabled(bool b) { |
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m_autoSuspend = b; |
376 |
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} |
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bool ScriptVM::isAutoSuspendEnabled() const { |
379 |
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return m_autoSuspend; |
380 |
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} |
381 |
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|
382 |
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void ScriptVM::setExitResultEnabled(bool b) { |
383 |
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m_acceptExitRes = b; |
384 |
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} |
385 |
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|
386 |
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bool ScriptVM::isExitResultEnabled() const { |
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return m_acceptExitRes; |
388 |
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} |
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|
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VMExecStatus_t ScriptVM::exec(VMParserContext* parserContext, VMExecContext* execContex, VMEventHandler* handler) { |
VMExecStatus_t ScriptVM::exec(VMParserContext* parserContext, VMExecContext* execContex, VMEventHandler* handler) { |
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m_parserContext = dynamic_cast<ParserContext*>(parserContext); |
m_parserContext = dynamic_cast<ParserContext*>(parserContext); |
392 |
if (!m_parserContext) { |
if (!m_parserContext) { |
393 |
std::cerr << "No VM parser context provided. Did you load a script?.\n"; |
std::cerr << "No VM parser context provided. Did you load a script?\n"; |
394 |
return VMExecStatus_t(VM_EXEC_NOT_RUNNING | VM_EXEC_ERROR); |
return VMExecStatus_t(VM_EXEC_NOT_RUNNING | VM_EXEC_ERROR); |
395 |
} |
} |
396 |
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|
409 |
m_parserContext->execContext = ctx; |
m_parserContext->execContext = ctx; |
410 |
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|
411 |
ctx->status = VM_EXEC_RUNNING; |
ctx->status = VM_EXEC_RUNNING; |
412 |
StmtFlags_t flags = STMT_SUCCESS; |
ctx->instructionsCount = 0; |
413 |
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ctx->clearExitRes(); |
414 |
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StmtFlags_t& flags = ctx->flags; |
415 |
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vmint instructionsCounter = 0; |
416 |
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vmint synced = m_autoSuspend ? 0 : 1; |
417 |
|
|
418 |
int& frameIdx = ctx->stackFrame; |
int& frameIdx = ctx->stackFrame; |
419 |
if (frameIdx < 0) { // start condition ... |
if (frameIdx < 0) { // start condition ... |
469 |
if (frame.subindex < 0) ctx->popStack(); |
if (frame.subindex < 0) ctx->popStack(); |
470 |
else { |
else { |
471 |
BranchStatement* branchStmt = (BranchStatement*) frame.statement; |
BranchStatement* branchStmt = (BranchStatement*) frame.statement; |
472 |
frame.subindex = branchStmt->evalBranch(); |
frame.subindex = |
473 |
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(decltype(frame.subindex)) |
474 |
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branchStmt->evalBranch(); |
475 |
if (frame.subindex >= 0) { |
if (frame.subindex >= 0) { |
476 |
ctx->pushStack( |
ctx->pushStack( |
477 |
branchStmt->branch(frame.subindex) |
branchStmt->branch(frame.subindex) |
492 |
ctx->pushStack( |
ctx->pushStack( |
493 |
whileStmt->statements() |
whileStmt->statements() |
494 |
); |
); |
495 |
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if (flags == STMT_SUCCESS && !synced && |
496 |
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instructionsCounter > SCRIPTVM_MAX_INSTR_PER_CYCLE_SOFT) |
497 |
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{ |
498 |
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flags = StmtFlags_t(STMT_SUSPEND_SIGNALLED); |
499 |
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ctx->suspendMicroseconds = SCRIPT_VM_FORCE_SUSPENSION_MICROSECONDS; |
500 |
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} |
501 |
} else ctx->popStack(); |
} else ctx->popStack(); |
502 |
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break; |
503 |
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} |
504 |
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|
505 |
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case STMT_SYNC: { |
506 |
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#if DEBUG_SCRIPTVM_CORE |
507 |
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_printIndents(frameIdx); |
508 |
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printf("-> STMT_SYNC\n"); |
509 |
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#endif |
510 |
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SyncBlock* syncStmt = (SyncBlock*) frame.statement; |
511 |
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if (!frame.subindex++ && syncStmt->statements()) { |
512 |
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++synced; |
513 |
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ctx->pushStack( |
514 |
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syncStmt->statements() |
515 |
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); |
516 |
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} else { |
517 |
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ctx->popStack(); |
518 |
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--synced; |
519 |
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} |
520 |
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break; |
521 |
} |
} |
522 |
|
|
523 |
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case STMT_NOOP: |
524 |
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break; // no operation like the name suggests |
525 |
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} |
526 |
|
|
527 |
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if (flags == STMT_SUCCESS && !synced && |
528 |
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instructionsCounter > SCRIPTVM_MAX_INSTR_PER_CYCLE_HARD) |
529 |
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{ |
530 |
|
flags = StmtFlags_t(STMT_SUSPEND_SIGNALLED); |
531 |
|
ctx->suspendMicroseconds = SCRIPT_VM_FORCE_SUSPENSION_MICROSECONDS; |
532 |
} |
} |
533 |
|
|
534 |
|
++instructionsCounter; |
535 |
} |
} |
536 |
|
|
537 |
if (flags & STMT_SUSPEND_SIGNALLED) { |
if ((flags & STMT_SUSPEND_SIGNALLED) && !(flags & STMT_ABORT_SIGNALLED)) { |
538 |
ctx->status = VM_EXEC_SUSPENDED; |
ctx->status = VM_EXEC_SUSPENDED; |
539 |
|
ctx->flags = STMT_SUCCESS; |
540 |
} else { |
} else { |
541 |
ctx->status = VM_EXEC_NOT_RUNNING; |
ctx->status = VM_EXEC_NOT_RUNNING; |
542 |
if (flags & STMT_ERROR_OCCURRED) |
if (flags & STMT_ERROR_OCCURRED) |
544 |
ctx->reset(); |
ctx->reset(); |
545 |
} |
} |
546 |
|
|
547 |
|
ctx->instructionsCount = instructionsCounter; |
548 |
|
|
549 |
m_eventHandler = NULL; |
m_eventHandler = NULL; |
550 |
m_parserContext->execContext = NULL; |
m_parserContext->execContext = NULL; |
551 |
m_parserContext = NULL; |
m_parserContext = NULL; |