/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- * vim: set ts=8 sts=4 et sw=4 tw=99: * This Source Code Form is subject to the terms of the Mozilla Public * License, v. 2.0. If a copy of the MPL was not distributed with this * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ #ifndef js_OldDebugAPI_h #define js_OldDebugAPI_h /* * JS debugger API. */ #include "mozilla/NullPtr.h" #include "jsbytecode.h" #include "js/CallArgs.h" #include "js/TypeDecls.h" class JSAtom; class JSFreeOp; namespace js { class StackFrame; class ScriptFrameIter; } // Raw JSScript* because this needs to be callable from a signal handler. extern JS_PUBLIC_API(unsigned) JS_PCToLineNumber(JSContext *cx, JSScript *script, jsbytecode *pc); namespace JS { class FrameDescription { public: FrameDescription(JSScript *script, JSFunction *fun, jsbytecode *pc) : script_(script) , fun_(fun) , pc_(pc) , linenoComputed(false) { } explicit FrameDescription(const js::ScriptFrameIter& iter); unsigned lineno() { if (!linenoComputed) { lineno_ = JS_PCToLineNumber(nullptr, script_, pc_); linenoComputed = true; } return lineno_; } Heap &script() { return script_; } Heap &fun() { return fun_; } private: Heap script_; Heap fun_; jsbytecode *pc_; unsigned lineno_; bool linenoComputed; }; struct StackDescription { unsigned nframes; FrameDescription *frames; }; extern JS_PUBLIC_API(StackDescription *) DescribeStack(JSContext *cx, unsigned maxFrames); extern JS_PUBLIC_API(void) FreeStackDescription(JSContext *cx, StackDescription *desc); extern JS_PUBLIC_API(char *) FormatStackDump(JSContext *cx, char *buf, bool showArgs, bool showLocals, bool showThisProps); } // namespace JS # ifdef JS_DEBUG JS_FRIEND_API(void) js_DumpValue(const JS::Value &val); JS_FRIEND_API(void) js_DumpId(jsid id); JS_FRIEND_API(void) js_DumpStackFrame(JSContext *cx, js::StackFrame *start = nullptr); # endif JS_FRIEND_API(void) js_DumpBacktrace(JSContext *cx); typedef enum JSTrapStatus { JSTRAP_ERROR, JSTRAP_CONTINUE, JSTRAP_RETURN, JSTRAP_THROW, JSTRAP_LIMIT } JSTrapStatus; typedef JSTrapStatus (* JSTrapHandler)(JSContext *cx, JSScript *script, jsbytecode *pc, JS::Value *rval, JS::Value closure); typedef JSTrapStatus (* JSInterruptHook)(JSContext *cx, JSScript *script, jsbytecode *pc, JS::Value *rval, void *closure); typedef JSTrapStatus (* JSDebuggerHandler)(JSContext *cx, JSScript *script, jsbytecode *pc, JS::Value *rval, void *closure); typedef JSTrapStatus (* JSThrowHook)(JSContext *cx, JSScript *script, jsbytecode *pc, JS::Value *rval, void *closure); typedef bool (* JSWatchPointHandler)(JSContext *cx, JSObject *obj, jsid id, JS::Value old, JS::Value *newp, void *closure); /* called just after script creation */ typedef void (* JSNewScriptHook)(JSContext *cx, const char *filename, /* URL of script */ unsigned lineno, /* first line */ JSScript *script, JSFunction *fun, void *callerdata); /* called just before script destruction */ typedef void (* JSDestroyScriptHook)(JSFreeOp *fop, JSScript *script, void *callerdata); typedef void (* JSSourceHandler)(const char *filename, unsigned lineno, const jschar *str, size_t length, void **listenerTSData, void *closure); extern JS_PUBLIC_API(JSCompartment *) JS_EnterCompartmentOfScript(JSContext *cx, JSScript *target); extern JS_PUBLIC_API(JSString *) JS_DecompileScript(JSContext *cx, JS::HandleScript script, const char *name, unsigned indent); /* * Currently, we only support runtime-wide debugging. In the future, we should * be able to support compartment-wide debugging. */ extern JS_PUBLIC_API(void) JS_SetRuntimeDebugMode(JSRuntime *rt, bool debug); /* * Debug mode is a compartment-wide mode that enables a debugger to attach * to and interact with running methodjit-ed frames. In particular, it causes * every function to be compiled as if an eval was present (so eval-in-frame) * can work, and it ensures that functions can be re-JITed for other debug * features. In general, it is not safe to interact with frames that were live * before debug mode was enabled. For this reason, it is also not safe to * enable debug mode while frames are live. */ /* Get current state of debugging mode. */ extern JS_PUBLIC_API(bool) JS_GetDebugMode(JSContext *cx); /* * Turn on/off debugging mode for all compartments. This returns false if any code * from any of the runtime's compartments is running or on the stack. */ JS_FRIEND_API(bool) JS_SetDebugModeForAllCompartments(JSContext *cx, bool debug); /* * Turn on/off debugging mode for a single compartment. This should only be * used when no code from this compartment is running or on the stack in any * thread. */ JS_FRIEND_API(bool) JS_SetDebugModeForCompartment(JSContext *cx, JSCompartment *comp, bool debug); /* * Turn on/off debugging mode for a context's compartment. */ JS_FRIEND_API(bool) JS_SetDebugMode(JSContext *cx, bool debug); /* Turn on single step mode. */ extern JS_PUBLIC_API(bool) JS_SetSingleStepMode(JSContext *cx, JSScript *script, bool singleStep); /* The closure argument will be marked. */ extern JS_PUBLIC_API(bool) JS_SetTrap(JSContext *cx, JSScript *script, jsbytecode *pc, JSTrapHandler handler, JS::Value closure); extern JS_PUBLIC_API(void) JS_ClearTrap(JSContext *cx, JSScript *script, jsbytecode *pc, JSTrapHandler *handlerp, JS::Value *closurep); extern JS_PUBLIC_API(void) JS_ClearScriptTraps(JSRuntime *rt, JSScript *script); extern JS_PUBLIC_API(void) JS_ClearAllTrapsForCompartment(JSContext *cx); extern JS_PUBLIC_API(bool) JS_SetInterrupt(JSRuntime *rt, JSInterruptHook handler, void *closure); extern JS_PUBLIC_API(bool) JS_ClearInterrupt(JSRuntime *rt, JSInterruptHook *handlerp, void **closurep); /************************************************************************/ extern JS_PUBLIC_API(bool) JS_SetWatchPoint(JSContext *cx, JSObject *obj, jsid id, JSWatchPointHandler handler, JSObject *closure); extern JS_PUBLIC_API(bool) JS_ClearWatchPoint(JSContext *cx, JSObject *obj, jsid id, JSWatchPointHandler *handlerp, JSObject **closurep); extern JS_PUBLIC_API(bool) JS_ClearWatchPointsForObject(JSContext *cx, JSObject *obj); /************************************************************************/ extern JS_PUBLIC_API(jsbytecode *) JS_LineNumberToPC(JSContext *cx, JSScript *script, unsigned lineno); extern JS_PUBLIC_API(jsbytecode *) JS_EndPC(JSContext *cx, JSScript *script); extern JS_PUBLIC_API(bool) JS_GetLinePCs(JSContext *cx, JSScript *script, unsigned startLine, unsigned maxLines, unsigned* count, unsigned** lines, jsbytecode*** pcs); extern JS_PUBLIC_API(unsigned) JS_GetFunctionArgumentCount(JSContext *cx, JSFunction *fun); extern JS_PUBLIC_API(bool) JS_FunctionHasLocalNames(JSContext *cx, JSFunction *fun); /* * N.B. The mark is in the context temp pool and thus the caller must take care * to call JS_ReleaseFunctionLocalNameArray in a LIFO manner (wrt to any other * call that may use the temp pool. */ extern JS_PUBLIC_API(uintptr_t *) JS_GetFunctionLocalNameArray(JSContext *cx, JSFunction *fun, void **markp); extern JS_PUBLIC_API(JSAtom *) JS_LocalNameToAtom(uintptr_t w); extern JS_PUBLIC_API(JSString *) JS_AtomKey(JSAtom *atom); extern JS_PUBLIC_API(void) JS_ReleaseFunctionLocalNameArray(JSContext *cx, void *mark); extern JS_PUBLIC_API(JSScript *) JS_GetFunctionScript(JSContext *cx, JSFunction *fun); extern JS_PUBLIC_API(JSNative) JS_GetFunctionNative(JSContext *cx, JSFunction *fun); extern JS_PUBLIC_API(JSPrincipals *) JS_GetScriptPrincipals(JSScript *script); extern JS_PUBLIC_API(JSPrincipals *) JS_GetScriptOriginPrincipals(JSScript *script); JS_PUBLIC_API(JSFunction *) JS_GetScriptFunction(JSContext *cx, JSScript *script); extern JS_PUBLIC_API(JSObject *) JS_GetParentOrScopeChain(JSContext *cx, JSObject *obj); /************************************************************************/ /* * This is almost JS_GetClass(obj)->name except that certain debug-only * proxies are made transparent. In particular, this function turns the class * of any scope (returned via JS_GetFrameScopeChain or JS_GetFrameCalleeObject) * from "Proxy" to "Call", "Block", "With" etc. */ extern JS_PUBLIC_API(const char *) JS_GetDebugClassName(JSObject *obj); /************************************************************************/ extern JS_PUBLIC_API(const char *) JS_GetScriptFilename(JSContext *cx, JSScript *script); extern JS_PUBLIC_API(const jschar *) JS_GetScriptSourceMap(JSContext *cx, JSScript *script); extern JS_PUBLIC_API(unsigned) JS_GetScriptBaseLineNumber(JSContext *cx, JSScript *script); extern JS_PUBLIC_API(unsigned) JS_GetScriptLineExtent(JSContext *cx, JSScript *script); extern JS_PUBLIC_API(JSVersion) JS_GetScriptVersion(JSContext *cx, JSScript *script); extern JS_PUBLIC_API(bool) JS_GetScriptIsSelfHosted(JSScript *script); /************************************************************************/ /* * Hook setters for script creation and destruction. These macros provide * binary compatibility and newer, shorter synonyms. */ #define JS_SetNewScriptHook JS_SetNewScriptHookProc #define JS_SetDestroyScriptHook JS_SetDestroyScriptHookProc extern JS_PUBLIC_API(void) JS_SetNewScriptHook(JSRuntime *rt, JSNewScriptHook hook, void *callerdata); extern JS_PUBLIC_API(void) JS_SetDestroyScriptHook(JSRuntime *rt, JSDestroyScriptHook hook, void *callerdata); /************************************************************************/ typedef struct JSPropertyDesc { JS::Value id; /* primary id, atomized string, or int */ JS::Value value; /* property value */ uint8_t flags; /* flags, see below */ uint8_t spare; /* unused */ JS::Value alias; /* alias id if JSPD_ALIAS flag */ } JSPropertyDesc; #define JSPD_ENUMERATE 0x01 /* visible to for/in loop */ #define JSPD_READONLY 0x02 /* assignment is error */ #define JSPD_PERMANENT 0x04 /* property cannot be deleted */ #define JSPD_ALIAS 0x08 /* property has an alias id */ #define JSPD_EXCEPTION 0x40 /* exception occurred fetching the property, */ /* value is exception */ #define JSPD_ERROR 0x80 /* native getter returned false without */ /* throwing an exception */ typedef struct JSPropertyDescArray { uint32_t length; /* number of elements in array */ JSPropertyDesc *array; /* alloc'd by Get, freed by Put */ } JSPropertyDescArray; typedef struct JSScopeProperty JSScopeProperty; extern JS_PUBLIC_API(bool) JS_GetPropertyDescArray(JSContext *cx, JSObject *obj, JSPropertyDescArray *pda); extern JS_PUBLIC_API(void) JS_PutPropertyDescArray(JSContext *cx, JSPropertyDescArray *pda); /************************************************************************/ /* * JSAbstractFramePtr is the public version of AbstractFramePtr, a pointer to a * StackFrame or baseline JIT frame. */ class JS_PUBLIC_API(JSAbstractFramePtr) { uintptr_t ptr_; jsbytecode *pc_; protected: JSAbstractFramePtr() : ptr_(0), pc_(nullptr) { } public: JSAbstractFramePtr(void *raw, jsbytecode *pc); uintptr_t raw() const { return ptr_; } jsbytecode *pc() const { return pc_; } operator bool() const { return !!ptr_; } JSObject *scopeChain(JSContext *cx); JSObject *callObject(JSContext *cx); JSFunction *maybeFun(); JSScript *script(); bool getThisValue(JSContext *cx, JS::MutableHandleValue thisv); bool isDebuggerFrame(); bool evaluateInStackFrame(JSContext *cx, const char *bytes, unsigned length, const char *filename, unsigned lineno, JS::MutableHandleValue rval); bool evaluateUCInStackFrame(JSContext *cx, const jschar *chars, unsigned length, const char *filename, unsigned lineno, JS::MutableHandleValue rval); }; class JS_PUBLIC_API(JSNullFramePtr) : public JSAbstractFramePtr { public: JSNullFramePtr() : JSAbstractFramePtr() {} }; /* * This class does not work when IonMonkey is active. It's only used by jsd, * which can only be used when IonMonkey is disabled. * * To find the calling script and line number, use JS_DescribeSciptedCaller. * To summarize the call stack, use JS::DescribeStack. */ class JS_PUBLIC_API(JSBrokenFrameIterator) { void *data_; public: JSBrokenFrameIterator(JSContext *cx); ~JSBrokenFrameIterator(); bool done() const; JSBrokenFrameIterator& operator++(); JSAbstractFramePtr abstractFramePtr() const; jsbytecode *pc() const; bool isConstructing() const; }; /* * This hook captures high level script execution and function calls (JS or * native). It is used by JS_SetExecuteHook to hook top level scripts and by * JS_SetCallHook to hook function calls. It will get called twice per script * or function call: just before execution begins and just after it finishes. * In both cases the 'current' frame is that of the executing code. * * The 'before' param is true for the hook invocation before the execution * and false for the invocation after the code has run. * * The 'ok' param is significant only on the post execution invocation to * signify whether or not the code completed 'normally'. * * The 'closure' param is as passed to JS_SetExecuteHook or JS_SetCallHook * for the 'before'invocation, but is whatever value is returned from that * invocation for the 'after' invocation. Thus, the hook implementor *could* * allocate a structure in the 'before' invocation and return a pointer to that * structure. The pointer would then be handed to the hook for the 'after' * invocation. Alternately, the 'before' could just return the same value as * in 'closure' to cause the 'after' invocation to be called with the same * 'closure' value as the 'before'. * * Returning nullptr in the 'before' hook will cause the 'after' hook *not* to * be called. */ typedef void * (* JSInterpreterHook)(JSContext *cx, JSAbstractFramePtr frame, bool isConstructing, bool before, bool *ok, void *closure); typedef bool (* JSDebugErrorHook)(JSContext *cx, const char *message, JSErrorReport *report, void *closure); typedef struct JSDebugHooks { JSInterruptHook interruptHook; void *interruptHookData; JSNewScriptHook newScriptHook; void *newScriptHookData; JSDestroyScriptHook destroyScriptHook; void *destroyScriptHookData; JSDebuggerHandler debuggerHandler; void *debuggerHandlerData; JSSourceHandler sourceHandler; void *sourceHandlerData; JSInterpreterHook executeHook; void *executeHookData; JSInterpreterHook callHook; void *callHookData; JSThrowHook throwHook; void *throwHookData; JSDebugErrorHook debugErrorHook; void *debugErrorHookData; } JSDebugHooks; /************************************************************************/ extern JS_PUBLIC_API(bool) JS_SetDebuggerHandler(JSRuntime *rt, JSDebuggerHandler hook, void *closure); extern JS_PUBLIC_API(bool) JS_SetSourceHandler(JSRuntime *rt, JSSourceHandler handler, void *closure); extern JS_PUBLIC_API(bool) JS_SetExecuteHook(JSRuntime *rt, JSInterpreterHook hook, void *closure); extern JS_PUBLIC_API(bool) JS_SetCallHook(JSRuntime *rt, JSInterpreterHook hook, void *closure); extern JS_PUBLIC_API(bool) JS_SetThrowHook(JSRuntime *rt, JSThrowHook hook, void *closure); extern JS_PUBLIC_API(bool) JS_SetDebugErrorHook(JSRuntime *rt, JSDebugErrorHook hook, void *closure); /************************************************************************/ extern JS_PUBLIC_API(const JSDebugHooks *) JS_GetGlobalDebugHooks(JSRuntime *rt); /** * Add various profiling-related functions as properties of the given object. */ extern JS_PUBLIC_API(bool) JS_DefineProfilingFunctions(JSContext *cx, JSObject *obj); /* Defined in vm/Debugger.cpp. */ extern JS_PUBLIC_API(bool) JS_DefineDebuggerObject(JSContext *cx, JSObject *obj); extern JS_PUBLIC_API(void) JS_DumpPCCounts(JSContext *cx, JSScript *script); extern JS_PUBLIC_API(void) JS_DumpCompartmentPCCounts(JSContext *cx); namespace js { extern JS_FRIEND_API(bool) CanCallContextDebugHandler(JSContext *cx); } /* Call the context debug handler on the topmost scripted frame. */ extern JS_FRIEND_API(bool) js_CallContextDebugHandler(JSContext *cx); #endif /* js_OldDebugAPI_h */