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  1. /*===---------------- llvm-c/Orc.h - OrcV2 C bindings -----------*- C++ -*-===*\
  2. |*                                                                            *|
  3. |* Part of the LLVM Project, under the Apache License v2.0 with LLVM          *|
  4. |* Exceptions.                                                                *|
  5. |* See https://llvm.org/LICENSE.txt for license information.                  *|
  6. |* SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception                    *|
  7. |*                                                                            *|
  8. |*===----------------------------------------------------------------------===*|
  9. |*                                                                            *|
  10. |* This header declares the C interface to libLLVMOrcJIT.a, which implements  *|
  11. |* JIT compilation of LLVM IR. Minimal documentation of C API specific issues *|
  12. |* (especially memory ownership rules) is provided. Core Orc concepts are     *|
  13. |* documented in llvm/docs/ORCv2.rst and APIs are documented in the C++       *|
  14. |* headers                                                                    *|
  15. |*                                                                            *|
  16. |* Many exotic languages can interoperate with C code but have a harder time  *|
  17. |* with C++ due to name mangling. So in addition to C, this interface enables *|
  18. |* tools written in such languages.                                           *|
  19. |*                                                                            *|
  20. |* Note: This interface is experimental. It is *NOT* stable, and may be       *|
  21. |*       changed without warning. Only C API usage documentation is           *|
  22. |*       provided. See the C++ documentation for all higher level ORC API     *|
  23. |*       details.                                                             *|
  24. |*                                                                            *|
  25. \*===----------------------------------------------------------------------===*/
  26.  
  27. #ifndef LLVM_C_ORC_H
  28. #define LLVM_C_ORC_H
  29.  
  30. #include "llvm-c/Error.h"
  31. #include "llvm-c/TargetMachine.h"
  32. #include "llvm-c/Types.h"
  33.  
  34. LLVM_C_EXTERN_C_BEGIN
  35.  
  36. /**
  37.  * @defgroup LLVMCExecutionEngineORC On-Request-Compilation
  38.  * @ingroup LLVMCExecutionEngine
  39.  *
  40.  * @{
  41.  */
  42.  
  43. /**
  44.  * Represents an address in the executor process.
  45.  */
  46. typedef uint64_t LLVMOrcJITTargetAddress;
  47.  
  48. /**
  49.  * Represents an address in the executor process.
  50.  */
  51. typedef uint64_t LLVMOrcExecutorAddress;
  52.  
  53. /**
  54.  * Represents generic linkage flags for a symbol definition.
  55.  */
  56. typedef enum {
  57.   LLVMJITSymbolGenericFlagsNone = 0,
  58.   LLVMJITSymbolGenericFlagsExported = 1U << 0,
  59.   LLVMJITSymbolGenericFlagsWeak = 1U << 1,
  60.   LLVMJITSymbolGenericFlagsCallable = 1U << 2,
  61.   LLVMJITSymbolGenericFlagsMaterializationSideEffectsOnly = 1U << 3
  62. } LLVMJITSymbolGenericFlags;
  63.  
  64. /**
  65.  * Represents target specific flags for a symbol definition.
  66.  */
  67. typedef uint8_t LLVMJITSymbolTargetFlags;
  68.  
  69. /**
  70.  * Represents the linkage flags for a symbol definition.
  71.  */
  72. typedef struct {
  73.   uint8_t GenericFlags;
  74.   uint8_t TargetFlags;
  75. } LLVMJITSymbolFlags;
  76.  
  77. /**
  78.  * Represents an evaluated symbol address and flags.
  79.  */
  80. typedef struct {
  81.   LLVMOrcExecutorAddress Address;
  82.   LLVMJITSymbolFlags Flags;
  83. } LLVMJITEvaluatedSymbol;
  84.  
  85. /**
  86.  * A reference to an orc::ExecutionSession instance.
  87.  */
  88. typedef struct LLVMOrcOpaqueExecutionSession *LLVMOrcExecutionSessionRef;
  89.  
  90. /**
  91.  * Error reporter function.
  92.  */
  93. typedef void (*LLVMOrcErrorReporterFunction)(void *Ctx, LLVMErrorRef Err);
  94.  
  95. /**
  96.  * A reference to an orc::SymbolStringPool.
  97.  */
  98. typedef struct LLVMOrcOpaqueSymbolStringPool *LLVMOrcSymbolStringPoolRef;
  99.  
  100. /**
  101.  * A reference to an orc::SymbolStringPool table entry.
  102.  */
  103. typedef struct LLVMOrcOpaqueSymbolStringPoolEntry
  104.     *LLVMOrcSymbolStringPoolEntryRef;
  105.  
  106. /**
  107.  * Represents a pair of a symbol name and LLVMJITSymbolFlags.
  108.  */
  109. typedef struct {
  110.   LLVMOrcSymbolStringPoolEntryRef Name;
  111.   LLVMJITSymbolFlags Flags;
  112. } LLVMOrcCSymbolFlagsMapPair;
  113.  
  114. /**
  115.  * Represents a list of (SymbolStringPtr, JITSymbolFlags) pairs that can be used
  116.  * to construct a SymbolFlagsMap.
  117.  */
  118. typedef LLVMOrcCSymbolFlagsMapPair *LLVMOrcCSymbolFlagsMapPairs;
  119.  
  120. /**
  121.  * Represents a pair of a symbol name and an evaluated symbol.
  122.  */
  123. typedef struct {
  124.   LLVMOrcSymbolStringPoolEntryRef Name;
  125.   LLVMJITEvaluatedSymbol Sym;
  126. } LLVMOrcCSymbolMapPair;
  127.  
  128. /**
  129.  * Represents a list of (SymbolStringPtr, JITEvaluatedSymbol) pairs that can be
  130.  * used to construct a SymbolMap.
  131.  */
  132. typedef LLVMOrcCSymbolMapPair *LLVMOrcCSymbolMapPairs;
  133.  
  134. /**
  135.  * Represents a SymbolAliasMapEntry
  136.  */
  137. typedef struct {
  138.   LLVMOrcSymbolStringPoolEntryRef Name;
  139.   LLVMJITSymbolFlags Flags;
  140. } LLVMOrcCSymbolAliasMapEntry;
  141.  
  142. /**
  143.  * Represents a pair of a symbol name and SymbolAliasMapEntry.
  144.  */
  145. typedef struct {
  146.   LLVMOrcSymbolStringPoolEntryRef Name;
  147.   LLVMOrcCSymbolAliasMapEntry Entry;
  148. } LLVMOrcCSymbolAliasMapPair;
  149.  
  150. /**
  151.  * Represents a list of (SymbolStringPtr, (SymbolStringPtr, JITSymbolFlags))
  152.  * pairs that can be used to construct a SymbolFlagsMap.
  153.  */
  154. typedef LLVMOrcCSymbolAliasMapPair *LLVMOrcCSymbolAliasMapPairs;
  155.  
  156. /**
  157.  * A reference to an orc::JITDylib instance.
  158.  */
  159. typedef struct LLVMOrcOpaqueJITDylib *LLVMOrcJITDylibRef;
  160.  
  161. /**
  162.  * Represents a list of LLVMOrcSymbolStringPoolEntryRef and the associated
  163.  * length.
  164.  */
  165. typedef struct {
  166.   LLVMOrcSymbolStringPoolEntryRef *Symbols;
  167.   size_t Length;
  168. } LLVMOrcCSymbolsList;
  169.  
  170. /**
  171.  * Represents a pair of a JITDylib and LLVMOrcCSymbolsList.
  172.  */
  173. typedef struct {
  174.   LLVMOrcJITDylibRef JD;
  175.   LLVMOrcCSymbolsList Names;
  176. } LLVMOrcCDependenceMapPair;
  177.  
  178. /**
  179.  * Represents a list of (JITDylibRef, (LLVMOrcSymbolStringPoolEntryRef*,
  180.  * size_t)) pairs that can be used to construct a SymbolDependenceMap.
  181.  */
  182. typedef LLVMOrcCDependenceMapPair *LLVMOrcCDependenceMapPairs;
  183.  
  184. /**
  185.  * Lookup kind. This can be used by definition generators when deciding whether
  186.  * to produce a definition for a requested symbol.
  187.  *
  188.  * This enum should be kept in sync with llvm::orc::LookupKind.
  189.  */
  190. typedef enum {
  191.   LLVMOrcLookupKindStatic,
  192.   LLVMOrcLookupKindDLSym
  193. } LLVMOrcLookupKind;
  194.  
  195. /**
  196.  * JITDylib lookup flags. This can be used by definition generators when
  197.  * deciding whether to produce a definition for a requested symbol.
  198.  *
  199.  * This enum should be kept in sync with llvm::orc::JITDylibLookupFlags.
  200.  */
  201. typedef enum {
  202.   LLVMOrcJITDylibLookupFlagsMatchExportedSymbolsOnly,
  203.   LLVMOrcJITDylibLookupFlagsMatchAllSymbols
  204. } LLVMOrcJITDylibLookupFlags;
  205.  
  206. /**
  207.  * An element type for a JITDylib search order.
  208.  */
  209. typedef struct {
  210.   LLVMOrcJITDylibRef JD;
  211.   LLVMOrcJITDylibLookupFlags JDLookupFlags;
  212. } LLVMOrcCJITDylibSearchOrderElement;
  213.  
  214. /**
  215.  * A JITDylib search order.
  216.  *
  217.  * The list is terminated with an element containing a null pointer for the JD
  218.  * field.
  219.  */
  220. typedef LLVMOrcCJITDylibSearchOrderElement *LLVMOrcCJITDylibSearchOrder;
  221.  
  222. /**
  223.  * Symbol lookup flags for lookup sets. This should be kept in sync with
  224.  * llvm::orc::SymbolLookupFlags.
  225.  */
  226. typedef enum {
  227.   LLVMOrcSymbolLookupFlagsRequiredSymbol,
  228.   LLVMOrcSymbolLookupFlagsWeaklyReferencedSymbol
  229. } LLVMOrcSymbolLookupFlags;
  230.  
  231. /**
  232.  * An element type for a symbol lookup set.
  233.  */
  234. typedef struct {
  235.   LLVMOrcSymbolStringPoolEntryRef Name;
  236.   LLVMOrcSymbolLookupFlags LookupFlags;
  237. } LLVMOrcCLookupSetElement;
  238.  
  239. /**
  240.  * A set of symbols to look up / generate.
  241.  *
  242.  * The list is terminated with an element containing a null pointer for the
  243.  * Name field.
  244.  *
  245.  * If a client creates an instance of this type then they are responsible for
  246.  * freeing it, and for ensuring that all strings have been retained over the
  247.  * course of its life. Clients receiving a copy from a callback are not
  248.  * responsible for managing lifetime or retain counts.
  249.  */
  250. typedef LLVMOrcCLookupSetElement *LLVMOrcCLookupSet;
  251.  
  252. /**
  253.  * A reference to a uniquely owned orc::MaterializationUnit instance.
  254.  */
  255. typedef struct LLVMOrcOpaqueMaterializationUnit *LLVMOrcMaterializationUnitRef;
  256.  
  257. /**
  258.  * A reference to a uniquely owned orc::MaterializationResponsibility instance.
  259.  *
  260.  * Ownership must be passed to a lower-level layer in a JIT stack.
  261.  */
  262. typedef struct LLVMOrcOpaqueMaterializationResponsibility
  263.     *LLVMOrcMaterializationResponsibilityRef;
  264.  
  265. /**
  266.  * A MaterializationUnit materialize callback.
  267.  *
  268.  * Ownership of the Ctx and MR arguments passes to the callback which must
  269.  * adhere to the LLVMOrcMaterializationResponsibilityRef contract (see comment
  270.  * for that type).
  271.  *
  272.  * If this callback is called then the LLVMOrcMaterializationUnitDestroy
  273.  * callback will NOT be called.
  274.  */
  275. typedef void (*LLVMOrcMaterializationUnitMaterializeFunction)(
  276.     void *Ctx, LLVMOrcMaterializationResponsibilityRef MR);
  277.  
  278. /**
  279.  * A MaterializationUnit discard callback.
  280.  *
  281.  * Ownership of JD and Symbol remain with the caller: These arguments should
  282.  * not be disposed of or released.
  283.  */
  284. typedef void (*LLVMOrcMaterializationUnitDiscardFunction)(
  285.     void *Ctx, LLVMOrcJITDylibRef JD, LLVMOrcSymbolStringPoolEntryRef Symbol);
  286.  
  287. /**
  288.  * A MaterializationUnit destruction callback.
  289.  *
  290.  * If a custom MaterializationUnit is destroyed before its Materialize
  291.  * function is called then this function will be called to provide an
  292.  * opportunity for the underlying program representation to be destroyed.
  293.  */
  294. typedef void (*LLVMOrcMaterializationUnitDestroyFunction)(void *Ctx);
  295.  
  296. /**
  297.  * A reference to an orc::ResourceTracker instance.
  298.  */
  299. typedef struct LLVMOrcOpaqueResourceTracker *LLVMOrcResourceTrackerRef;
  300.  
  301. /**
  302.  * A reference to an orc::DefinitionGenerator.
  303.  */
  304. typedef struct LLVMOrcOpaqueDefinitionGenerator
  305.     *LLVMOrcDefinitionGeneratorRef;
  306.  
  307. /**
  308.  * An opaque lookup state object. Instances of this type can be captured to
  309.  * suspend a lookup while a custom generator function attempts to produce a
  310.  * definition.
  311.  *
  312.  * If a client captures a lookup state object then they must eventually call
  313.  * LLVMOrcLookupStateContinueLookup to restart the lookup. This is required
  314.  * in order to release memory allocated for the lookup state, even if errors
  315.  * have occurred while the lookup was suspended (if these errors have made the
  316.  * lookup impossible to complete then it will issue its own error before
  317.  * destruction).
  318.  */
  319. typedef struct LLVMOrcOpaqueLookupState *LLVMOrcLookupStateRef;
  320.  
  321. /**
  322.  * A custom generator function. This can be used to create a custom generator
  323.  * object using LLVMOrcCreateCustomCAPIDefinitionGenerator. The resulting
  324.  * object can be attached to a JITDylib, via LLVMOrcJITDylibAddGenerator, to
  325.  * receive callbacks when lookups fail to match existing definitions.
  326.  *
  327.  * GeneratorObj will contain the address of the custom generator object.
  328.  *
  329.  * Ctx will contain the context object passed to
  330.  * LLVMOrcCreateCustomCAPIDefinitionGenerator.
  331.  *
  332.  * LookupState will contain a pointer to an LLVMOrcLookupStateRef object. This
  333.  * can optionally be modified to make the definition generation process
  334.  * asynchronous: If the LookupStateRef value is copied, and the original
  335.  * LLVMOrcLookupStateRef set to null, the lookup will be suspended. Once the
  336.  * asynchronous definition process has been completed clients must call
  337.  * LLVMOrcLookupStateContinueLookup to continue the lookup (this should be
  338.  * done unconditionally, even if errors have occurred in the mean time, to
  339.  * free the lookup state memory and notify the query object of the failures).
  340.  * If LookupState is captured this function must return LLVMErrorSuccess.
  341.  *
  342.  * The Kind argument can be inspected to determine the lookup kind (e.g.
  343.  * as-if-during-static-link, or as-if-during-dlsym).
  344.  *
  345.  * The JD argument specifies which JITDylib the definitions should be generated
  346.  * into.
  347.  *
  348.  * The JDLookupFlags argument can be inspected to determine whether the original
  349.  * lookup included non-exported symobls.
  350.  *
  351.  * Finally, the LookupSet argument contains the set of symbols that could not
  352.  * be found in JD already (the set of generation candidates).
  353.  */
  354. typedef LLVMErrorRef (*LLVMOrcCAPIDefinitionGeneratorTryToGenerateFunction)(
  355.     LLVMOrcDefinitionGeneratorRef GeneratorObj, void *Ctx,
  356.     LLVMOrcLookupStateRef *LookupState, LLVMOrcLookupKind Kind,
  357.     LLVMOrcJITDylibRef JD, LLVMOrcJITDylibLookupFlags JDLookupFlags,
  358.     LLVMOrcCLookupSet LookupSet, size_t LookupSetSize);
  359.  
  360. /**
  361.  * Disposer for a custom generator.
  362.  *
  363.  * Will be called by ORC when the JITDylib that the generator is attached to
  364.  * is destroyed.
  365.  */
  366. typedef void (*LLVMOrcDisposeCAPIDefinitionGeneratorFunction)(void *Ctx);
  367.  
  368. /**
  369.  * Predicate function for SymbolStringPoolEntries.
  370.  */
  371. typedef int (*LLVMOrcSymbolPredicate)(void *Ctx,
  372.                                       LLVMOrcSymbolStringPoolEntryRef Sym);
  373.  
  374. /**
  375.  * A reference to an orc::ThreadSafeContext instance.
  376.  */
  377. typedef struct LLVMOrcOpaqueThreadSafeContext *LLVMOrcThreadSafeContextRef;
  378.  
  379. /**
  380.  * A reference to an orc::ThreadSafeModule instance.
  381.  */
  382. typedef struct LLVMOrcOpaqueThreadSafeModule *LLVMOrcThreadSafeModuleRef;
  383.  
  384. /**
  385.  * A function for inspecting/mutating IR modules, suitable for use with
  386.  * LLVMOrcThreadSafeModuleWithModuleDo.
  387.  */
  388. typedef LLVMErrorRef (*LLVMOrcGenericIRModuleOperationFunction)(
  389.     void *Ctx, LLVMModuleRef M);
  390.  
  391. /**
  392.  * A reference to an orc::JITTargetMachineBuilder instance.
  393.  */
  394. typedef struct LLVMOrcOpaqueJITTargetMachineBuilder
  395.     *LLVMOrcJITTargetMachineBuilderRef;
  396.  
  397. /**
  398.  * A reference to an orc::ObjectLayer instance.
  399.  */
  400. typedef struct LLVMOrcOpaqueObjectLayer *LLVMOrcObjectLayerRef;
  401.  
  402. /**
  403.  * A reference to an orc::ObjectLinkingLayer instance.
  404.  */
  405. typedef struct LLVMOrcOpaqueObjectLinkingLayer *LLVMOrcObjectLinkingLayerRef;
  406.  
  407. /**
  408.  * A reference to an orc::IRTransformLayer instance.
  409.  */
  410. typedef struct LLVMOrcOpaqueIRTransformLayer *LLVMOrcIRTransformLayerRef;
  411.  
  412. /**
  413.  * A function for applying transformations as part of an transform layer.
  414.  *
  415.  * Implementations of this type are responsible for managing the lifetime
  416.  * of the Module pointed to by ModInOut: If the LLVMModuleRef value is
  417.  * overwritten then the function is responsible for disposing of the incoming
  418.  * module. If the module is simply accessed/mutated in-place then ownership
  419.  * returns to the caller and the function does not need to do any lifetime
  420.  * management.
  421.  *
  422.  * Clients can call LLVMOrcLLJITGetIRTransformLayer to obtain the transform
  423.  * layer of a LLJIT instance, and use LLVMOrcIRTransformLayerSetTransform
  424.  * to set the function. This can be used to override the default transform
  425.  * layer.
  426.  */
  427. typedef LLVMErrorRef (*LLVMOrcIRTransformLayerTransformFunction)(
  428.     void *Ctx, LLVMOrcThreadSafeModuleRef *ModInOut,
  429.     LLVMOrcMaterializationResponsibilityRef MR);
  430.  
  431. /**
  432.  * A reference to an orc::ObjectTransformLayer instance.
  433.  */
  434. typedef struct LLVMOrcOpaqueObjectTransformLayer
  435.     *LLVMOrcObjectTransformLayerRef;
  436.  
  437. /**
  438.  * A function for applying transformations to an object file buffer.
  439.  *
  440.  * Implementations of this type are responsible for managing the lifetime
  441.  * of the memory buffer pointed to by ObjInOut: If the LLVMMemoryBufferRef
  442.  * value is overwritten then the function is responsible for disposing of the
  443.  * incoming buffer. If the buffer is simply accessed/mutated in-place then
  444.  * ownership returns to the caller and the function does not need to do any
  445.  * lifetime management.
  446.  *
  447.  * The transform is allowed to return an error, in which case the ObjInOut
  448.  * buffer should be disposed of and set to null.
  449.  */
  450. typedef LLVMErrorRef (*LLVMOrcObjectTransformLayerTransformFunction)(
  451.     void *Ctx, LLVMMemoryBufferRef *ObjInOut);
  452.  
  453. /**
  454.  * A reference to an orc::IndirectStubsManager instance.
  455.  */
  456. typedef struct LLVMOrcOpaqueIndirectStubsManager
  457.     *LLVMOrcIndirectStubsManagerRef;
  458.  
  459. /**
  460.  * A reference to an orc::LazyCallThroughManager instance.
  461.  */
  462. typedef struct LLVMOrcOpaqueLazyCallThroughManager
  463.     *LLVMOrcLazyCallThroughManagerRef;
  464.  
  465. /**
  466.  * A reference to an orc::DumpObjects object.
  467.  *
  468.  * Can be used to dump object files to disk with unique names. Useful as an
  469.  * ObjectTransformLayer transform.
  470.  */
  471. typedef struct LLVMOrcOpaqueDumpObjects *LLVMOrcDumpObjectsRef;
  472.  
  473. /**
  474.  * Attach a custom error reporter function to the ExecutionSession.
  475.  *
  476.  * The error reporter will be called to deliver failure notices that can not be
  477.  * directly reported to a caller. For example, failure to resolve symbols in
  478.  * the JIT linker is typically reported via the error reporter (callers
  479.  * requesting definitions from the JIT will typically be delivered a
  480.  * FailureToMaterialize error instead).
  481.  */
  482. void LLVMOrcExecutionSessionSetErrorReporter(
  483.     LLVMOrcExecutionSessionRef ES, LLVMOrcErrorReporterFunction ReportError,
  484.     void *Ctx);
  485.  
  486. /**
  487.  * Return a reference to the SymbolStringPool for an ExecutionSession.
  488.  *
  489.  * Ownership of the pool remains with the ExecutionSession: The caller is
  490.  * not required to free the pool.
  491.  */
  492. LLVMOrcSymbolStringPoolRef
  493. LLVMOrcExecutionSessionGetSymbolStringPool(LLVMOrcExecutionSessionRef ES);
  494.  
  495. /**
  496.  * Clear all unreferenced symbol string pool entries.
  497.  *
  498.  * This can be called at any time to release unused entries in the
  499.  * ExecutionSession's string pool. Since it locks the pool (preventing
  500.  * interning of any new strings) it is recommended that it only be called
  501.  * infrequently, ideally when the caller has reason to believe that some
  502.  * entries will have become unreferenced, e.g. after removing a module or
  503.  * closing a JITDylib.
  504.  */
  505. void LLVMOrcSymbolStringPoolClearDeadEntries(LLVMOrcSymbolStringPoolRef SSP);
  506.  
  507. /**
  508.  * Intern a string in the ExecutionSession's SymbolStringPool and return a
  509.  * reference to it. This increments the ref-count of the pool entry, and the
  510.  * returned value should be released once the client is done with it by
  511.  * calling LLVMOrReleaseSymbolStringPoolEntry.
  512.  *
  513.  * Since strings are uniqued within the SymbolStringPool
  514.  * LLVMOrcSymbolStringPoolEntryRefs can be compared by value to test string
  515.  * equality.
  516.  *
  517.  * Note that this function does not perform linker-mangling on the string.
  518.  */
  519. LLVMOrcSymbolStringPoolEntryRef
  520. LLVMOrcExecutionSessionIntern(LLVMOrcExecutionSessionRef ES, const char *Name);
  521.  
  522. /**
  523.  * Callback type for ExecutionSession lookups.
  524.  *
  525.  * If Err is LLVMErrorSuccess then Result will contain a pointer to a
  526.  * list of ( SymbolStringPtr, JITEvaluatedSymbol ) pairs of length NumPairs.
  527.  *
  528.  * If Err is a failure value then Result and Ctx are undefined and should
  529.  * not be accessed. The Callback is responsible for handling the error
  530.  * value (e.g. by calling LLVMGetErrorMessage + LLVMDisposeErrorMessage).
  531.  *
  532.  * The caller retains ownership of the Result array and will release all
  533.  * contained symbol names. Clients are responsible for retaining any symbol
  534.  * names that they wish to hold after the function returns.
  535.  */
  536. typedef void (*LLVMOrcExecutionSessionLookupHandleResultFunction)(
  537.     LLVMErrorRef Err, LLVMOrcCSymbolMapPairs Result, size_t NumPairs,
  538.     void *Ctx);
  539.  
  540. /**
  541.  * Look up symbols in an execution session.
  542.  *
  543.  * This is a wrapper around the general ExecutionSession::lookup function.
  544.  *
  545.  * The SearchOrder argument contains a list of (JITDylibs, JITDylibSearchFlags)
  546.  * pairs that describe the search order. The JITDylibs will be searched in the
  547.  * given order to try to find the symbols in the Symbols argument.
  548.  *
  549.  * The Symbols argument should contain a null-terminated array of
  550.  * (SymbolStringPtr, SymbolLookupFlags) pairs describing the symbols to be
  551.  * searched for. This function takes ownership of the elements of the Symbols
  552.  * array. The Name fields of the Symbols elements are taken to have been
  553.  * retained by the client for this function. The client should *not* release the
  554.  * Name fields, but are still responsible for destroying the array itself.
  555.  *
  556.  * The HandleResult function will be called once all searched for symbols have
  557.  * been found, or an error occurs. The HandleResult function will be passed an
  558.  * LLVMErrorRef indicating success or failure, and (on success) a
  559.  * null-terminated LLVMOrcCSymbolMapPairs array containing the function result,
  560.  * and the Ctx value passed to the lookup function.
  561.  *
  562.  * The client is fully responsible for managing the lifetime of the Ctx object.
  563.  * A common idiom is to allocate the context prior to the lookup and deallocate
  564.  * it in the handler.
  565.  *
  566.  * THIS API IS EXPERIMENTAL AND LIKELY TO CHANGE IN THE NEAR FUTURE!
  567.  */
  568. void LLVMOrcExecutionSessionLookup(
  569.     LLVMOrcExecutionSessionRef ES, LLVMOrcLookupKind K,
  570.     LLVMOrcCJITDylibSearchOrder SearchOrder, size_t SearchOrderSize,
  571.     LLVMOrcCLookupSet Symbols, size_t SymbolsSize,
  572.     LLVMOrcExecutionSessionLookupHandleResultFunction HandleResult, void *Ctx);
  573.  
  574. /**
  575.  * Increments the ref-count for a SymbolStringPool entry.
  576.  */
  577. void LLVMOrcRetainSymbolStringPoolEntry(LLVMOrcSymbolStringPoolEntryRef S);
  578.  
  579. /**
  580.  * Reduces the ref-count for of a SymbolStringPool entry.
  581.  */
  582. void LLVMOrcReleaseSymbolStringPoolEntry(LLVMOrcSymbolStringPoolEntryRef S);
  583.  
  584. /**
  585.  * Return the c-string for the given symbol. This string will remain valid until
  586.  * the entry is freed (once all LLVMOrcSymbolStringPoolEntryRefs have been
  587.  * released).
  588.  */
  589. const char *LLVMOrcSymbolStringPoolEntryStr(LLVMOrcSymbolStringPoolEntryRef S);
  590.  
  591. /**
  592.  * Reduces the ref-count of a ResourceTracker.
  593.  */
  594. void LLVMOrcReleaseResourceTracker(LLVMOrcResourceTrackerRef RT);
  595.  
  596. /**
  597.  * Transfers tracking of all resources associated with resource tracker SrcRT
  598.  * to resource tracker DstRT.
  599.  */
  600. void LLVMOrcResourceTrackerTransferTo(LLVMOrcResourceTrackerRef SrcRT,
  601.                                       LLVMOrcResourceTrackerRef DstRT);
  602.  
  603. /**
  604.  * Remove all resources associated with the given tracker. See
  605.  * ResourceTracker::remove().
  606.  */
  607. LLVMErrorRef LLVMOrcResourceTrackerRemove(LLVMOrcResourceTrackerRef RT);
  608.  
  609. /**
  610.  * Dispose of a JITDylib::DefinitionGenerator. This should only be called if
  611.  * ownership has not been passed to a JITDylib (e.g. because some error
  612.  * prevented the client from calling LLVMOrcJITDylibAddGenerator).
  613.  */
  614. void LLVMOrcDisposeDefinitionGenerator(LLVMOrcDefinitionGeneratorRef DG);
  615.  
  616. /**
  617.  * Dispose of a MaterializationUnit.
  618.  */
  619. void LLVMOrcDisposeMaterializationUnit(LLVMOrcMaterializationUnitRef MU);
  620.  
  621. /**
  622.  * Create a custom MaterializationUnit.
  623.  *
  624.  * Name is a name for this MaterializationUnit to be used for identification
  625.  * and logging purposes (e.g. if this MaterializationUnit produces an
  626.  * object buffer then the name of that buffer will be derived from this name).
  627.  *
  628.  * The Syms list contains the names and linkages of the symbols provided by this
  629.  * unit. This function takes ownership of the elements of the Syms array. The
  630.  * Name fields of the array elements are taken to have been retained for this
  631.  * function. The client should *not* release the elements of the array, but is
  632.  * still responsible for destroying the array itself.
  633.  *
  634.  * The InitSym argument indicates whether or not this MaterializationUnit
  635.  * contains static initializers. If three are no static initializers (the common
  636.  * case) then this argument should be null. If there are static initializers
  637.  * then InitSym should be set to a unique name that also appears in the Syms
  638.  * list with the LLVMJITSymbolGenericFlagsMaterializationSideEffectsOnly flag
  639.  * set. This function takes ownership of the InitSym, which should have been
  640.  * retained twice on behalf of this function: once for the Syms entry and once
  641.  * for InitSym. If clients wish to use the InitSym value after this function
  642.  * returns they must retain it once more for themselves.
  643.  *
  644.  * If any of the symbols in the Syms list is looked up then the Materialize
  645.  * function will be called.
  646.  *
  647.  * If any of the symbols in the Syms list is overridden then the Discard
  648.  * function will be called.
  649.  *
  650.  * The caller owns the underling MaterializationUnit and is responsible for
  651.  * either passing it to a JITDylib (via LLVMOrcJITDylibDefine) or disposing
  652.  * of it by calling LLVMOrcDisposeMaterializationUnit.
  653.  */
  654. LLVMOrcMaterializationUnitRef LLVMOrcCreateCustomMaterializationUnit(
  655.     const char *Name, void *Ctx, LLVMOrcCSymbolFlagsMapPairs Syms,
  656.     size_t NumSyms, LLVMOrcSymbolStringPoolEntryRef InitSym,
  657.     LLVMOrcMaterializationUnitMaterializeFunction Materialize,
  658.     LLVMOrcMaterializationUnitDiscardFunction Discard,
  659.     LLVMOrcMaterializationUnitDestroyFunction Destroy);
  660.  
  661. /**
  662.  * Create a MaterializationUnit to define the given symbols as pointing to
  663.  * the corresponding raw addresses.
  664.  *
  665.  * This function takes ownership of the elements of the Syms array. The Name
  666.  * fields of the array elements are taken to have been retained for this
  667.  * function. This allows the following pattern...
  668.  *
  669.  *   size_t NumPairs;
  670.  *   LLVMOrcCSymbolMapPairs Sym;
  671.  *   -- Build Syms array --
  672.  *   LLVMOrcMaterializationUnitRef MU =
  673.  *       LLVMOrcAbsoluteSymbols(Syms, NumPairs);
  674.  *
  675.  * ... without requiring cleanup of the elements of the Sym array afterwards.
  676.  *
  677.  * The client is still responsible for deleting the Sym array itself.
  678.  *
  679.  * If a client wishes to reuse elements of the Sym array after this call they
  680.  * must explicitly retain each of the elements for themselves.
  681.  */
  682. LLVMOrcMaterializationUnitRef
  683. LLVMOrcAbsoluteSymbols(LLVMOrcCSymbolMapPairs Syms, size_t NumPairs);
  684.  
  685. /**
  686.  * Create a MaterializationUnit to define lazy re-expots. These are callable
  687.  * entry points that call through to the given symbols.
  688.  *
  689.  * This function takes ownership of the CallableAliases array. The Name
  690.  * fields of the array elements are taken to have been retained for this
  691.  * function. This allows the following pattern...
  692.  *
  693.  *   size_t NumPairs;
  694.  *   LLVMOrcCSymbolAliasMapPairs CallableAliases;
  695.  *   -- Build CallableAliases array --
  696.  *   LLVMOrcMaterializationUnitRef MU =
  697.  *      LLVMOrcLazyReexports(LCTM, ISM, JD, CallableAliases, NumPairs);
  698.  *
  699.  * ... without requiring cleanup of the elements of the CallableAliases array afterwards.
  700.  *
  701.  * The client is still responsible for deleting the CallableAliases array itself.
  702.  *
  703.  * If a client wishes to reuse elements of the CallableAliases array after this call they
  704.  * must explicitly retain each of the elements for themselves.
  705.  */
  706. LLVMOrcMaterializationUnitRef LLVMOrcLazyReexports(
  707.     LLVMOrcLazyCallThroughManagerRef LCTM, LLVMOrcIndirectStubsManagerRef ISM,
  708.     LLVMOrcJITDylibRef SourceRef, LLVMOrcCSymbolAliasMapPairs CallableAliases,
  709.     size_t NumPairs);
  710. // TODO: ImplSymbolMad SrcJDLoc
  711.  
  712. /**
  713.  * Disposes of the passed MaterializationResponsibility object.
  714.  *
  715.  * This should only be done after the symbols covered by the object have either
  716.  * been resolved and emitted (via
  717.  * LLVMOrcMaterializationResponsibilityNotifyResolved and
  718.  * LLVMOrcMaterializationResponsibilityNotifyEmitted) or failed (via
  719.  * LLVMOrcMaterializationResponsibilityFailMaterialization).
  720.  */
  721. void LLVMOrcDisposeMaterializationResponsibility(
  722.     LLVMOrcMaterializationResponsibilityRef MR);
  723.  
  724. /**
  725.  * Returns the target JITDylib that these symbols are being materialized into.
  726.  */
  727. LLVMOrcJITDylibRef LLVMOrcMaterializationResponsibilityGetTargetDylib(
  728.     LLVMOrcMaterializationResponsibilityRef MR);
  729.  
  730. /**
  731.  * Returns the ExecutionSession for this MaterializationResponsibility.
  732.  */
  733. LLVMOrcExecutionSessionRef
  734. LLVMOrcMaterializationResponsibilityGetExecutionSession(
  735.     LLVMOrcMaterializationResponsibilityRef MR);
  736.  
  737. /**
  738.  * Returns the symbol flags map for this responsibility instance.
  739.  *
  740.  * The length of the array is returned in NumPairs and the caller is responsible
  741.  * for the returned memory and needs to call LLVMOrcDisposeCSymbolFlagsMap.
  742.  *
  743.  * To use the returned symbols beyond the livetime of the
  744.  * MaterializationResponsibility requires the caller to retain the symbols
  745.  * explicitly.
  746.  */
  747. LLVMOrcCSymbolFlagsMapPairs LLVMOrcMaterializationResponsibilityGetSymbols(
  748.     LLVMOrcMaterializationResponsibilityRef MR, size_t *NumPairs);
  749.  
  750. /**
  751.  * Disposes of the passed LLVMOrcCSymbolFlagsMap.
  752.  *
  753.  * Does not release the entries themselves.
  754.  */
  755. void LLVMOrcDisposeCSymbolFlagsMap(LLVMOrcCSymbolFlagsMapPairs Pairs);
  756.  
  757. /**
  758.  * Returns the initialization pseudo-symbol, if any. This symbol will also
  759.  * be present in the SymbolFlagsMap for this MaterializationResponsibility
  760.  * object.
  761.  *
  762.  * The returned symbol is not retained over any mutating operation of the
  763.  * MaterializationResponsbility or beyond the lifetime thereof.
  764.  */
  765. LLVMOrcSymbolStringPoolEntryRef
  766. LLVMOrcMaterializationResponsibilityGetInitializerSymbol(
  767.     LLVMOrcMaterializationResponsibilityRef MR);
  768.  
  769. /**
  770.  * Returns the names of any symbols covered by this
  771.  * MaterializationResponsibility object that have queries pending. This
  772.  * information can be used to return responsibility for unrequested symbols
  773.  * back to the JITDylib via the delegate method.
  774.  */
  775. LLVMOrcSymbolStringPoolEntryRef *
  776. LLVMOrcMaterializationResponsibilityGetRequestedSymbols(
  777.     LLVMOrcMaterializationResponsibilityRef MR, size_t *NumSymbols);
  778.  
  779. /**
  780.  * Disposes of the passed LLVMOrcSymbolStringPoolEntryRef* .
  781.  *
  782.  * Does not release the symbols themselves.
  783.  */
  784. void LLVMOrcDisposeSymbols(LLVMOrcSymbolStringPoolEntryRef *Symbols);
  785.  
  786. /**
  787.  * Notifies the target JITDylib that the given symbols have been resolved.
  788.  * This will update the given symbols' addresses in the JITDylib, and notify
  789.  * any pending queries on the given symbols of their resolution. The given
  790.  * symbols must be ones covered by this MaterializationResponsibility
  791.  * instance. Individual calls to this method may resolve a subset of the
  792.  * symbols, but all symbols must have been resolved prior to calling emit.
  793.  *
  794.  * This method will return an error if any symbols being resolved have been
  795.  * moved to the error state due to the failure of a dependency. If this
  796.  * method returns an error then clients should log it and call
  797.  * LLVMOrcMaterializationResponsibilityFailMaterialization. If no dependencies
  798.  * have been registered for the symbols covered by this
  799.  * MaterializationResponsibiility then this method is guaranteed to return
  800.  * LLVMErrorSuccess.
  801.  */
  802. LLVMErrorRef LLVMOrcMaterializationResponsibilityNotifyResolved(
  803.     LLVMOrcMaterializationResponsibilityRef MR, LLVMOrcCSymbolMapPairs Symbols,
  804.     size_t NumPairs);
  805.  
  806. /**
  807.  * Notifies the target JITDylib (and any pending queries on that JITDylib)
  808.  * that all symbols covered by this MaterializationResponsibility instance
  809.  * have been emitted.
  810.  *
  811.  * This method will return an error if any symbols being resolved have been
  812.  * moved to the error state due to the failure of a dependency. If this
  813.  * method returns an error then clients should log it and call
  814.  * LLVMOrcMaterializationResponsibilityFailMaterialization.
  815.  * If no dependencies have been registered for the symbols covered by this
  816.  * MaterializationResponsibiility then this method is guaranteed to return
  817.  * LLVMErrorSuccess.
  818.  */
  819. LLVMErrorRef LLVMOrcMaterializationResponsibilityNotifyEmitted(
  820.     LLVMOrcMaterializationResponsibilityRef MR);
  821.  
  822. /**
  823.  * Attempt to claim responsibility for new definitions. This method can be
  824.  * used to claim responsibility for symbols that are added to a
  825.  * materialization unit during the compilation process (e.g. literal pool
  826.  * symbols). Symbol linkage rules are the same as for symbols that are
  827.  * defined up front: duplicate strong definitions will result in errors.
  828.  * Duplicate weak definitions will be discarded (in which case they will
  829.  * not be added to this responsibility instance).
  830.  *
  831.  * This method can be used by materialization units that want to add
  832.  * additional symbols at materialization time (e.g. stubs, compile
  833.  * callbacks, metadata)
  834.  */
  835. LLVMErrorRef LLVMOrcMaterializationResponsibilityDefineMaterializing(
  836.     LLVMOrcMaterializationResponsibilityRef MR,
  837.     LLVMOrcCSymbolFlagsMapPairs Pairs, size_t NumPairs);
  838.  
  839. /**
  840.  * Notify all not-yet-emitted covered by this MaterializationResponsibility
  841.  * instance that an error has occurred.
  842.  * This will remove all symbols covered by this MaterializationResponsibilty
  843.  * from the target JITDylib, and send an error to any queries waiting on
  844.  * these symbols.
  845.  */
  846. void LLVMOrcMaterializationResponsibilityFailMaterialization(
  847.     LLVMOrcMaterializationResponsibilityRef MR);
  848.  
  849. /**
  850.  * Transfers responsibility to the given MaterializationUnit for all
  851.  * symbols defined by that MaterializationUnit. This allows
  852.  * materializers to break up work based on run-time information (e.g.
  853.  * by introspecting which symbols have actually been looked up and
  854.  * materializing only those).
  855.  */
  856. LLVMErrorRef LLVMOrcMaterializationResponsibilityReplace(
  857.     LLVMOrcMaterializationResponsibilityRef MR,
  858.     LLVMOrcMaterializationUnitRef MU);
  859.  
  860. /**
  861.  * Delegates responsibility for the given symbols to the returned
  862.  * materialization responsibility. Useful for breaking up work between
  863.  * threads, or different kinds of materialization processes.
  864.  *
  865.  * The caller retains responsibility of the the passed
  866.  * MaterializationResponsibility.
  867.  */
  868. LLVMErrorRef LLVMOrcMaterializationResponsibilityDelegate(
  869.     LLVMOrcMaterializationResponsibilityRef MR,
  870.     LLVMOrcSymbolStringPoolEntryRef *Symbols, size_t NumSymbols,
  871.     LLVMOrcMaterializationResponsibilityRef *Result);
  872.  
  873. /**
  874.  * Adds dependencies to a symbol that the MaterializationResponsibility is
  875.  * responsible for.
  876.  *
  877.  * This function takes ownership of Dependencies struct. The Names
  878.  * array have been retained for this function. This allows the following
  879.  * pattern...
  880.  *
  881.  *   LLVMOrcSymbolStringPoolEntryRef Names[] = {...};
  882.  *   LLVMOrcCDependenceMapPair Dependence = {JD, {Names, sizeof(Names)}}
  883.  *   LLVMOrcMaterializationResponsibilityAddDependencies(JD, Name, &Dependence,
  884.  * 1);
  885.  *
  886.  * ... without requiring cleanup of the elements of the Names array afterwards.
  887.  *
  888.  * The client is still responsible for deleting the Dependencies.Names array
  889.  * itself.
  890.  */
  891. void LLVMOrcMaterializationResponsibilityAddDependencies(
  892.     LLVMOrcMaterializationResponsibilityRef MR,
  893.     LLVMOrcSymbolStringPoolEntryRef Name,
  894.     LLVMOrcCDependenceMapPairs Dependencies, size_t NumPairs);
  895.  
  896. /**
  897.  * Adds dependencies to all symbols that the MaterializationResponsibility is
  898.  * responsible for. See LLVMOrcMaterializationResponsibilityAddDependencies for
  899.  * notes about memory responsibility.
  900.  */
  901. void LLVMOrcMaterializationResponsibilityAddDependenciesForAll(
  902.     LLVMOrcMaterializationResponsibilityRef MR,
  903.     LLVMOrcCDependenceMapPairs Dependencies, size_t NumPairs);
  904.  
  905. /**
  906.  * Create a "bare" JITDylib.
  907.  *
  908.  * The client is responsible for ensuring that the JITDylib's name is unique,
  909.  * e.g. by calling LLVMOrcExecutionSessionGetJTIDylibByName first.
  910.  *
  911.  * This call does not install any library code or symbols into the newly
  912.  * created JITDylib. The client is responsible for all configuration.
  913.  */
  914. LLVMOrcJITDylibRef
  915. LLVMOrcExecutionSessionCreateBareJITDylib(LLVMOrcExecutionSessionRef ES,
  916.                                           const char *Name);
  917.  
  918. /**
  919.  * Create a JITDylib.
  920.  *
  921.  * The client is responsible for ensuring that the JITDylib's name is unique,
  922.  * e.g. by calling LLVMOrcExecutionSessionGetJTIDylibByName first.
  923.  *
  924.  * If a Platform is attached to the ExecutionSession then
  925.  * Platform::setupJITDylib will be called to install standard platform symbols
  926.  * (e.g. standard library interposes). If no Platform is installed then this
  927.  * call is equivalent to LLVMExecutionSessionRefCreateBareJITDylib and will
  928.  * always return success.
  929.  */
  930. LLVMErrorRef
  931. LLVMOrcExecutionSessionCreateJITDylib(LLVMOrcExecutionSessionRef ES,
  932.                                       LLVMOrcJITDylibRef *Result,
  933.                                       const char *Name);
  934.  
  935. /**
  936.  * Returns the JITDylib with the given name, or NULL if no such JITDylib
  937.  * exists.
  938.  */
  939. LLVMOrcJITDylibRef
  940. LLVMOrcExecutionSessionGetJITDylibByName(LLVMOrcExecutionSessionRef ES,
  941.                                          const char *Name);
  942.  
  943. /**
  944.  * Return a reference to a newly created resource tracker associated with JD.
  945.  * The tracker is returned with an initial ref-count of 1, and must be released
  946.  * with LLVMOrcReleaseResourceTracker when no longer needed.
  947.  */
  948. LLVMOrcResourceTrackerRef
  949. LLVMOrcJITDylibCreateResourceTracker(LLVMOrcJITDylibRef JD);
  950.  
  951. /**
  952.  * Return a reference to the default resource tracker for the given JITDylib.
  953.  * This operation will increase the retain count of the tracker: Clients should
  954.  * call LLVMOrcReleaseResourceTracker when the result is no longer needed.
  955.  */
  956. LLVMOrcResourceTrackerRef
  957. LLVMOrcJITDylibGetDefaultResourceTracker(LLVMOrcJITDylibRef JD);
  958.  
  959. /**
  960.  * Add the given MaterializationUnit to the given JITDylib.
  961.  *
  962.  * If this operation succeeds then JITDylib JD will take ownership of MU.
  963.  * If the operation fails then ownership remains with the caller who should
  964.  * call LLVMOrcDisposeMaterializationUnit to destroy it.
  965.  */
  966. LLVMErrorRef LLVMOrcJITDylibDefine(LLVMOrcJITDylibRef JD,
  967.                                    LLVMOrcMaterializationUnitRef MU);
  968.  
  969. /**
  970.  * Calls remove on all trackers associated with this JITDylib, see
  971.  * JITDylib::clear().
  972.  */
  973. LLVMErrorRef LLVMOrcJITDylibClear(LLVMOrcJITDylibRef JD);
  974.  
  975. /**
  976.  * Add a DefinitionGenerator to the given JITDylib.
  977.  *
  978.  * The JITDylib will take ownership of the given generator: The client is no
  979.  * longer responsible for managing its memory.
  980.  */
  981. void LLVMOrcJITDylibAddGenerator(LLVMOrcJITDylibRef JD,
  982.                                  LLVMOrcDefinitionGeneratorRef DG);
  983.  
  984. /**
  985.  * Create a custom generator.
  986.  *
  987.  * The F argument will be used to implement the DefinitionGenerator's
  988.  * tryToGenerate method (see
  989.  * LLVMOrcCAPIDefinitionGeneratorTryToGenerateFunction).
  990.  *
  991.  * Ctx is a context object that will be passed to F. This argument is
  992.  * permitted to be null.
  993.  *
  994.  * Dispose is the disposal function for Ctx. This argument is permitted to be
  995.  * null (in which case the client is responsible for the lifetime of Ctx).
  996.  */
  997. LLVMOrcDefinitionGeneratorRef LLVMOrcCreateCustomCAPIDefinitionGenerator(
  998.     LLVMOrcCAPIDefinitionGeneratorTryToGenerateFunction F, void *Ctx,
  999.     LLVMOrcDisposeCAPIDefinitionGeneratorFunction Dispose);
  1000.  
  1001. /**
  1002.  * Continue a lookup that was suspended in a generator (see
  1003.  * LLVMOrcCAPIDefinitionGeneratorTryToGenerateFunction).
  1004.  */
  1005. void LLVMOrcLookupStateContinueLookup(LLVMOrcLookupStateRef S,
  1006.                                       LLVMErrorRef Err);
  1007.  
  1008. /**
  1009.  * Get a DynamicLibrarySearchGenerator that will reflect process symbols into
  1010.  * the JITDylib. On success the resulting generator is owned by the client.
  1011.  * Ownership is typically transferred by adding the instance to a JITDylib
  1012.  * using LLVMOrcJITDylibAddGenerator,
  1013.  *
  1014.  * The GlobalPrefix argument specifies the character that appears on the front
  1015.  * of linker-mangled symbols for the target platform (e.g. '_' on MachO).
  1016.  * If non-null, this character will be stripped from the start of all symbol
  1017.  * strings before passing the remaining substring to dlsym.
  1018.  *
  1019.  * The optional Filter and Ctx arguments can be used to supply a symbol name
  1020.  * filter: Only symbols for which the filter returns true will be visible to
  1021.  * JIT'd code. If the Filter argument is null then all process symbols will
  1022.  * be visible to JIT'd code. Note that the symbol name passed to the Filter
  1023.  * function is the full mangled symbol: The client is responsible for stripping
  1024.  * the global prefix if present.
  1025.  */
  1026. LLVMErrorRef LLVMOrcCreateDynamicLibrarySearchGeneratorForProcess(
  1027.     LLVMOrcDefinitionGeneratorRef *Result, char GlobalPrefx,
  1028.     LLVMOrcSymbolPredicate Filter, void *FilterCtx);
  1029.  
  1030. /**
  1031.  * Get a LLVMOrcCreateDynamicLibararySearchGeneratorForPath that will reflect
  1032.  * library symbols into the JITDylib. On success the resulting generator is
  1033.  * owned by the client. Ownership is typically transferred by adding the
  1034.  * instance to a JITDylib using LLVMOrcJITDylibAddGenerator,
  1035.  *
  1036.  * The GlobalPrefix argument specifies the character that appears on the front
  1037.  * of linker-mangled symbols for the target platform (e.g. '_' on MachO).
  1038.  * If non-null, this character will be stripped from the start of all symbol
  1039.  * strings before passing the remaining substring to dlsym.
  1040.  *
  1041.  * The optional Filter and Ctx arguments can be used to supply a symbol name
  1042.  * filter: Only symbols for which the filter returns true will be visible to
  1043.  * JIT'd code. If the Filter argument is null then all library symbols will
  1044.  * be visible to JIT'd code. Note that the symbol name passed to the Filter
  1045.  * function is the full mangled symbol: The client is responsible for stripping
  1046.  * the global prefix if present.
  1047.  *
  1048.  * THIS API IS EXPERIMENTAL AND LIKELY TO CHANGE IN THE NEAR FUTURE!
  1049.  *
  1050.  */
  1051. LLVMErrorRef LLVMOrcCreateDynamicLibrarySearchGeneratorForPath(
  1052.     LLVMOrcDefinitionGeneratorRef *Result, const char *FileName,
  1053.     char GlobalPrefix, LLVMOrcSymbolPredicate Filter, void *FilterCtx);
  1054.  
  1055. /**
  1056.  * Get a LLVMOrcCreateStaticLibrarySearchGeneratorForPath that will reflect
  1057.  * static library symbols into the JITDylib. On success the resulting
  1058.  * generator is owned by the client. Ownership is typically transferred by
  1059.  * adding the instance to a JITDylib using LLVMOrcJITDylibAddGenerator,
  1060.  *
  1061.  * Call with the optional TargetTriple argument will succeed if the file at
  1062.  * the given path is a static library or a MachO universal binary containing a
  1063.  * static library that is compatible with the given triple. Otherwise it will
  1064.  * return an error.
  1065.  *
  1066.  * THIS API IS EXPERIMENTAL AND LIKELY TO CHANGE IN THE NEAR FUTURE!
  1067.  *
  1068.  */
  1069. LLVMErrorRef LLVMOrcCreateStaticLibrarySearchGeneratorForPath(
  1070.     LLVMOrcDefinitionGeneratorRef *Result, LLVMOrcObjectLayerRef ObjLayer,
  1071.     const char *FileName, const char *TargetTriple);
  1072.  
  1073. /**
  1074.  * Create a ThreadSafeContext containing a new LLVMContext.
  1075.  *
  1076.  * Ownership of the underlying ThreadSafeContext data is shared: Clients
  1077.  * can and should dispose of their ThreadSafeContext as soon as they no longer
  1078.  * need to refer to it directly. Other references (e.g. from ThreadSafeModules)
  1079.  * will keep the data alive as long as it is needed.
  1080.  */
  1081. LLVMOrcThreadSafeContextRef LLVMOrcCreateNewThreadSafeContext(void);
  1082.  
  1083. /**
  1084.  * Get a reference to the wrapped LLVMContext.
  1085.  */
  1086. LLVMContextRef
  1087. LLVMOrcThreadSafeContextGetContext(LLVMOrcThreadSafeContextRef TSCtx);
  1088.  
  1089. /**
  1090.  * Dispose of a ThreadSafeContext.
  1091.  */
  1092. void LLVMOrcDisposeThreadSafeContext(LLVMOrcThreadSafeContextRef TSCtx);
  1093.  
  1094. /**
  1095.  * Create a ThreadSafeModule wrapper around the given LLVM module. This takes
  1096.  * ownership of the M argument which should not be disposed of or referenced
  1097.  * after this function returns.
  1098.  *
  1099.  * Ownership of the ThreadSafeModule is unique: If it is transferred to the JIT
  1100.  * (e.g. by LLVMOrcLLJITAddLLVMIRModule) then the client is no longer
  1101.  * responsible for it. If it is not transferred to the JIT then the client
  1102.  * should call LLVMOrcDisposeThreadSafeModule to dispose of it.
  1103.  */
  1104. LLVMOrcThreadSafeModuleRef
  1105. LLVMOrcCreateNewThreadSafeModule(LLVMModuleRef M,
  1106.                                  LLVMOrcThreadSafeContextRef TSCtx);
  1107.  
  1108. /**
  1109.  * Dispose of a ThreadSafeModule. This should only be called if ownership has
  1110.  * not been passed to LLJIT (e.g. because some error prevented the client from
  1111.  * adding this to the JIT).
  1112.  */
  1113. void LLVMOrcDisposeThreadSafeModule(LLVMOrcThreadSafeModuleRef TSM);
  1114.  
  1115. /**
  1116.  * Apply the given function to the module contained in this ThreadSafeModule.
  1117.  */
  1118. LLVMErrorRef
  1119. LLVMOrcThreadSafeModuleWithModuleDo(LLVMOrcThreadSafeModuleRef TSM,
  1120.                                     LLVMOrcGenericIRModuleOperationFunction F,
  1121.                                     void *Ctx);
  1122.  
  1123. /**
  1124.  * Create a JITTargetMachineBuilder by detecting the host.
  1125.  *
  1126.  * On success the client owns the resulting JITTargetMachineBuilder. It must be
  1127.  * passed to a consuming operation (e.g.
  1128.  * LLVMOrcLLJITBuilderSetJITTargetMachineBuilder) or disposed of by calling
  1129.  * LLVMOrcDisposeJITTargetMachineBuilder.
  1130.  */
  1131. LLVMErrorRef LLVMOrcJITTargetMachineBuilderDetectHost(
  1132.     LLVMOrcJITTargetMachineBuilderRef *Result);
  1133.  
  1134. /**
  1135.  * Create a JITTargetMachineBuilder from the given TargetMachine template.
  1136.  *
  1137.  * This operation takes ownership of the given TargetMachine and destroys it
  1138.  * before returing. The resulting JITTargetMachineBuilder is owned by the client
  1139.  * and must be passed to a consuming operation (e.g.
  1140.  * LLVMOrcLLJITBuilderSetJITTargetMachineBuilder) or disposed of by calling
  1141.  * LLVMOrcDisposeJITTargetMachineBuilder.
  1142.  */
  1143. LLVMOrcJITTargetMachineBuilderRef
  1144. LLVMOrcJITTargetMachineBuilderCreateFromTargetMachine(LLVMTargetMachineRef TM);
  1145.  
  1146. /**
  1147.  * Dispose of a JITTargetMachineBuilder.
  1148.  */
  1149. void LLVMOrcDisposeJITTargetMachineBuilder(
  1150.     LLVMOrcJITTargetMachineBuilderRef JTMB);
  1151.  
  1152. /**
  1153.  * Returns the target triple for the given JITTargetMachineBuilder as a string.
  1154.  *
  1155.  * The caller owns the resulting string as must dispose of it by calling
  1156.  * LLVMDisposeMessage
  1157.  */
  1158. char *LLVMOrcJITTargetMachineBuilderGetTargetTriple(
  1159.     LLVMOrcJITTargetMachineBuilderRef JTMB);
  1160.  
  1161. /**
  1162.  * Sets the target triple for the given JITTargetMachineBuilder to the given
  1163.  * string.
  1164.  */
  1165. void LLVMOrcJITTargetMachineBuilderSetTargetTriple(
  1166.     LLVMOrcJITTargetMachineBuilderRef JTMB, const char *TargetTriple);
  1167.  
  1168. /**
  1169.  * Add an object to an ObjectLayer to the given JITDylib.
  1170.  *
  1171.  * Adds a buffer representing an object file to the given JITDylib using the
  1172.  * given ObjectLayer instance. This operation transfers ownership of the buffer
  1173.  * to the ObjectLayer instance. The buffer should not be disposed of or
  1174.  * referenced once this function returns.
  1175.  *
  1176.  * Resources associated with the given object will be tracked by the given
  1177.  * JITDylib's default ResourceTracker.
  1178.  */
  1179. LLVMErrorRef LLVMOrcObjectLayerAddObjectFile(LLVMOrcObjectLayerRef ObjLayer,
  1180.                                              LLVMOrcJITDylibRef JD,
  1181.                                              LLVMMemoryBufferRef ObjBuffer);
  1182.  
  1183. /**
  1184.  * Add an object to an ObjectLayer using the given ResourceTracker.
  1185.  *
  1186.  * Adds a buffer representing an object file to the given ResourceTracker's
  1187.  * JITDylib using the given ObjectLayer instance. This operation transfers
  1188.  * ownership of the buffer to the ObjectLayer instance. The buffer should not
  1189.  * be disposed of or referenced once this function returns.
  1190.  *
  1191.  * Resources associated with the given object will be tracked by
  1192.  * ResourceTracker RT.
  1193.  */
  1194. LLVMErrorRef
  1195. LLVMOrcObjectLayerAddObjectFileWithRT(LLVMOrcObjectLayerRef ObjLayer,
  1196.                                       LLVMOrcResourceTrackerRef RT,
  1197.                                       LLVMMemoryBufferRef ObjBuffer);
  1198.  
  1199. /**
  1200.  * Emit an object buffer to an ObjectLayer.
  1201.  *
  1202.  * Ownership of the responsibility object and object buffer pass to this
  1203.  * function. The client is not responsible for cleanup.
  1204.  */
  1205. void LLVMOrcObjectLayerEmit(LLVMOrcObjectLayerRef ObjLayer,
  1206.                             LLVMOrcMaterializationResponsibilityRef R,
  1207.                             LLVMMemoryBufferRef ObjBuffer);
  1208.  
  1209. /**
  1210.  * Dispose of an ObjectLayer.
  1211.  */
  1212. void LLVMOrcDisposeObjectLayer(LLVMOrcObjectLayerRef ObjLayer);
  1213.  
  1214. void LLVMOrcIRTransformLayerEmit(LLVMOrcIRTransformLayerRef IRTransformLayer,
  1215.                                  LLVMOrcMaterializationResponsibilityRef MR,
  1216.                                  LLVMOrcThreadSafeModuleRef TSM);
  1217.  
  1218. /**
  1219.  * Set the transform function of the provided transform layer, passing through a
  1220.  * pointer to user provided context.
  1221.  */
  1222. void LLVMOrcIRTransformLayerSetTransform(
  1223.     LLVMOrcIRTransformLayerRef IRTransformLayer,
  1224.     LLVMOrcIRTransformLayerTransformFunction TransformFunction, void *Ctx);
  1225.  
  1226. /**
  1227.  * Set the transform function on an LLVMOrcObjectTransformLayer.
  1228.  */
  1229. void LLVMOrcObjectTransformLayerSetTransform(
  1230.     LLVMOrcObjectTransformLayerRef ObjTransformLayer,
  1231.     LLVMOrcObjectTransformLayerTransformFunction TransformFunction, void *Ctx);
  1232.  
  1233. /**
  1234.  * Create a LocalIndirectStubsManager from the given target triple.
  1235.  *
  1236.  * The resulting IndirectStubsManager is owned by the client
  1237.  * and must be disposed of by calling LLVMOrcDisposeDisposeIndirectStubsManager.
  1238.  */
  1239. LLVMOrcIndirectStubsManagerRef
  1240. LLVMOrcCreateLocalIndirectStubsManager(const char *TargetTriple);
  1241.  
  1242. /**
  1243.  * Dispose of an IndirectStubsManager.
  1244.  */
  1245. void LLVMOrcDisposeIndirectStubsManager(LLVMOrcIndirectStubsManagerRef ISM);
  1246.  
  1247. LLVMErrorRef LLVMOrcCreateLocalLazyCallThroughManager(
  1248.     const char *TargetTriple, LLVMOrcExecutionSessionRef ES,
  1249.     LLVMOrcJITTargetAddress ErrorHandlerAddr,
  1250.     LLVMOrcLazyCallThroughManagerRef *LCTM);
  1251.  
  1252. /**
  1253.  * Dispose of an LazyCallThroughManager.
  1254.  */
  1255. void LLVMOrcDisposeLazyCallThroughManager(
  1256.     LLVMOrcLazyCallThroughManagerRef LCTM);
  1257.  
  1258. /**
  1259.  * Create a DumpObjects instance.
  1260.  *
  1261.  * DumpDir specifies the path to write dumped objects to. DumpDir may be empty
  1262.  * in which case files will be dumped to the working directory.
  1263.  *
  1264.  * IdentifierOverride specifies a file name stem to use when dumping objects.
  1265.  * If empty then each MemoryBuffer's identifier will be used (with a .o suffix
  1266.  * added if not already present). If an identifier override is supplied it will
  1267.  * be used instead, along with an incrementing counter (since all buffers will
  1268.  * use the same identifier, the resulting files will be named <ident>.o,
  1269.  * <ident>.2.o, <ident>.3.o, and so on). IdentifierOverride should not contain
  1270.  * an extension, as a .o suffix will be added by DumpObjects.
  1271.  */
  1272. LLVMOrcDumpObjectsRef LLVMOrcCreateDumpObjects(const char *DumpDir,
  1273.                                                const char *IdentifierOverride);
  1274.  
  1275. /**
  1276.  * Dispose of a DumpObjects instance.
  1277.  */
  1278. void LLVMOrcDisposeDumpObjects(LLVMOrcDumpObjectsRef DumpObjects);
  1279.  
  1280. /**
  1281.  * Dump the contents of the given MemoryBuffer.
  1282.  */
  1283. LLVMErrorRef LLVMOrcDumpObjects_CallOperator(LLVMOrcDumpObjectsRef DumpObjects,
  1284.                                              LLVMMemoryBufferRef *ObjBuffer);
  1285.  
  1286. /**
  1287.  * @}
  1288.  */
  1289.  
  1290. LLVM_C_EXTERN_C_END
  1291.  
  1292. #endif /* LLVM_C_ORC_H */
  1293.