CN106557300A - A kind of function stack information of wild pointer determines method, device and electronic equipment - Google Patents
A kind of function stack information of wild pointer determines method, device and electronic equipment Download PDFInfo
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- CN106557300A CN106557300A CN201510618656.4A CN201510618656A CN106557300A CN 106557300 A CN106557300 A CN 106557300A CN 201510618656 A CN201510618656 A CN 201510618656A CN 106557300 A CN106557300 A CN 106557300A
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Abstract
The embodiment of the present invention provides a kind of function stack information of wild pointer and determines method, device and electronic equipment, and wherein method includes：Hook internal memory call function, when internal memory call function is called, to determine the stack information of internal memory call function；Determine the stack information of the region of memory that internal memory call function is pointed to, region of memory determined by record and the internal memory call function corresponding to region of memory；When application crashes are caused by wild pointer, the region of memory pointed by wild pointer is determined；From the stack information of the internal memory call function corresponding to the region of memory and region of memory for being recorded, determine the stack information of the region of memory pointed by wild pointer, obtain the function stack information of wild pointer.The embodiment of the present invention it is determined that wild pointer function stack information when, greatly simplify process logic so that the determination of the function stack information of wild pointer is relatively simple.
Description
Technical field
The present invention relates to technical field of data processing, and in particular to a kind of function stack information of wild pointer determines
Method, device and electronic equipment.
Background technology
Wild pointer is directed to the pointer of unavailable region of memory, if application is operationally grasped to wild pointer
Make, will cause (to collapse) using crash；Wild pointer causes the principle using (such as IOS applications etc.) crash
Predominantly, after an object (example of the object for class) of application is released, its corresponding region of memory
Disabled region of memory will be become, and other objects will be when pointer (i.e. the wild pointer) of the object will be held,
If being continuing with the pointer, will cause to apply crash.Caused the problem using crash for positioning by wild pointer
Code, determines that the function call information involved by wild pointer seems particularly necessary.
Determine that the mode of the function call information involved by wild pointer is mainly at present, reproduction is led by wild pointer
The application crash scenes of cause, so as to the function call information involved by wild pointer is navigated to by aid；
However, reappear to need to expend great workload using crash scenes by caused by wild pointer, logic is realized
It is relatively complicated, and success rate cannot ensure；Therefore how simply and accurately to determine the function of wild pointer
Recalls information, becomes the problem that those skilled in the art need to consider.
The content of the invention
In view of this, a kind of function stack information of wild pointer of embodiment of the present invention offer determines method, device
And electronic equipment, simply and accurately to determine the function call information of wild pointer.
For achieving the above object, the embodiment of the present invention provides following technical scheme：
A kind of function stack information of wild pointer determines method, including：
Hook internal memory call function, when internal memory call function is called, to determine the stack of internal memory call function
Information；
Determine the region of memory that internal memory call function is pointed to, region of memory and region of memory determined by record
The stack information of corresponding internal memory call function；
When application crashes are caused by wild pointer, the region of memory pointed by wild pointer is determined；
From the stack information of the internal memory call function corresponding to the region of memory and region of memory for being recorded, really
Determine the stack information of the region of memory pointed by wild pointer, obtain the function stack information of wild pointer.
The embodiment of the present invention also provides a kind of function stack information determining means of wild pointer, including：
Hook module, for hook internal memory call function, with when internal memory call function is called, it is determined that interior
Deposit the stack information of call function；
Module is determined and recorded, for determining the region of memory of internal memory call function sensing, record is determined
Region of memory and region of memory corresponding to internal memory call function stack information；
Collapse determining module, causes application crashes by wild pointer for determining；
Region of memory determining module is pointed to, for when application crashes are caused by wild pointer, determining wild pointer
Pointed region of memory；
Stack information determination module, for adjusting from the internal memory corresponding to the region of memory and region of memory for being recorded
With in the stack information of function, determine the stack information of the region of memory pointed by wild pointer, obtain wild pointer
Function stack information.
The embodiment of the present invention also provides a kind of electronic equipment, including the function stack letter of wild pointer described above
Breath determining device.
Based on above-mentioned technical proposal, the function stack information of wild pointer provided in an embodiment of the present invention determines method,
Can be by hook (hook) internal memory call function, record obtains the memory field operated by internal memory call function
Domain, and the stack information of the corresponding internal memory call function of region of memory, so as to cause application to be collapsed by wild pointer
When routed, the region of memory pointed by wild pointer can be passed through, from the region of memory and region of memory institute for having recorded
In the stack information of corresponding internal memory call function, the function stack information of wild pointer is determined；The present invention is implemented
The determination method of the function stack information of the wild pointer that example is provided, when being related to the internal memory call function of hook and calling
Data record, the determination of the region of memory pointed by wild pointer, with recorded data search open country refer to
The operation of the function stack information of pin, can determine wild pointer when application crashes are caused by wild pointer
Function stack information, is not required to reappear by application crashes scene caused by wild pointer, greatly simplify determination open country and refers to
Involved process logic in the function stack information process of pin so that the determination of the function stack information of wild pointer
It is relatively simple.
Description of the drawings
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to reality
Apply accompanying drawing to be used needed for example or description of the prior art to be briefly described, it should be apparent that, below
Accompanying drawing in description is only embodiments of the invention, for those of ordinary skill in the art, not
On the premise of paying creative work, can be with according to the other accompanying drawings of accompanying drawing acquisition for providing.
Fig. 1 is the flow chart that the function stack information of wild pointer provided in an embodiment of the present invention determines method；
Fig. 2 is another flow chart that the function stack information of wild pointer provided in an embodiment of the present invention determines method；
Fig. 3 is the determination method flow diagram caused by wild pointer using crash provided in an embodiment of the present invention；
Fig. 4 is another stream for being caused the determination method using crash by wild pointer provided in an embodiment of the present invention
Cheng Tu；
Recorded content schematic diagrams of the Fig. 5 for crash log；
Fig. 6 is another flow chart that the function stack information of wild pointer provided in an embodiment of the present invention determines method；
Fig. 7 is the structured flowchart of the function stack information determining means of wild pointer provided in an embodiment of the present invention；
Fig. 8 is the structured flowchart of hook module provided in an embodiment of the present invention；
Fig. 9 is the structured flowchart of collapse determining module provided in an embodiment of the present invention；
Figure 10 is the structured flowchart for pointing to region of memory determining module provided in an embodiment of the present invention；
Figure 11 is another structured flowchart of collapse determining module provided in an embodiment of the present invention；
Figure 12 is another structured flowchart for pointing to region of memory determining module provided in an embodiment of the present invention；
Figure 13 is another structural frames of the function stack information determining means of wild pointer provided in an embodiment of the present invention
Figure；
Figure 14 is the structured flowchart of logger module provided in an embodiment of the present invention；
Figure 15 is the hardware block diagram of electronic equipment provided in an embodiment of the present invention.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the invention, and
It is not all, of embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art are not doing
The every other embodiment obtained under the premise of going out creative work, belongs to the scope of protection of the invention.
Fig. 1 is the flow chart that the function stack information of wild pointer provided in an embodiment of the present invention determines method, the party
Method can be applicable to the electronic equipment for being mounted with application, such as be mounted with the electronic equipment of IOS applications, electronic equipment
The such as user equipment such as mobile phone, panel computer；With reference to Fig. 1, the method can include：
Step S100, hook internal memory call function, when internal memory call function is called, to determine that internal memory is adjusted
With the stack information of function；
Hook also known as Hook Technique, by redirecting or Modification growth function table is realizing in system or third party's letter
Number goes to the function for setting before calling；
What the stack information (also referred to as function stack information) of internal memory call function was represented is stack when function is called
State, (such as trace back to function upper one is can to trace back to the caller of function by function stack information
To first caller)；Optionally, the embodiment of the present invention can pass through when internal memory call function is called
Hook technologies, add stack backtracking instruction, so as to trace back to the stack information of called internal memory call function；
In embodiments of the present invention, the function call information involved by wild pointer, is primarily referred to as wild pointer institute
The stack information (i.e. the function stack information of wild pointer) of the internal memory call function of the region of memory of sensing, passes through
The function stack information of wild pointer, the distribution of the region of memory that can be apparent from pointed by wild pointer, release
Involved code, consequently facilitating the positioning of problem code；
It is object distribution, the operation of releasing memory using existing in running by internal memory call function；
Optionally, internal memory call function can include：For the memory allocation function in object storage allocation region, and/
Or, the internal memory for object releasing memory region discharges function；Accordingly, the stack information of internal memory call function
Can include：For the stack information in object storage allocation region, and/or, it is the stack in object releasing memory region
Information；
The embodiment of the present invention can be adjusted by hook internal memories in the called execution of each internal memory call function
With function, with before in internal memory call function as object release or storage allocation region, execution stack backtracking instruction,
So as to trace back to the stack information of internal memory call function,
Step S110, the region of memory for determining the sensing of internal memory call function, region of memory determined by record
And the stack information of the internal memory call function corresponding to region of memory；
The stack information of the internal memory call function corresponding to region of memory refers to, operates the internal memory of the region of memory
The stack information of call function；Such as distribute the stack information of the memory allocation function of the region of memory, and release should
The internal memory of region of memory discharges the stack information of function；
The stack information of the internal memory call function traced back to by step S100 will be with internal memory call function existing object
Release or the region of memory for distributing are associated, so as to recorded the memory field of internal memory call function existing object
Domain, and the corresponding stack information of internal memory call function；
Optionally, region of memory can be memory address；
By the operation of step S100, the embodiment of the present invention can record each region of memory and be released or dividing
Timing, corresponding stack information, record obtain function (letter involved when region of memory is released or distributes
Number is by stack message reflection).
Step S120, when being caused using crash by wild pointer, determine the region of memory pointed by wild pointer；
When using crash, the embodiment of the present invention can pass through to analyze the top layer function using during crash, or different
Often keyword is determined whether by crash is applied caused by wild pointer；If using top layer function during crash with
Preset function correspondence, or, it is corresponding with preset keyword using abnormal keyword during crash, then can determine that
Be by caused by wild pointer apply crash；
Wherein, preset function can be being caused using top layer letter during crash by wild pointer of analyzing in advance
Number, preset keyword can be being caused using abnormal keyword during crash by wild pointer of analyzing in advance；
If corresponding with preset function using top layer function during crash, then the embodiment of the present invention can be in application
During crash, the region of memory pointed by wild pointer is obtained from the depositor corresponding to the top layer function；
The corresponding depositor of top layer function may be considered the deposit that storage top layer function performs data and result data
Device；
If corresponding with preset keyword using abnormal keyword during crash, then the embodiment of the present invention can be from
The region of memory pointed by wild pointer is parsed in the abnormal keyword.
Step S130, from the stack of the internal memory call function corresponding to the region of memory and region of memory for being recorded
In information, determine the stack information of the region of memory pointed by wild pointer, obtain the function stack information of wild pointer.
The function stack information of wild pointer provided in an embodiment of the present invention determines method, including：Hook internal memories are adjusted
With function, when internal memory call function is called, to determine the stack information of internal memory call function, while determining
The region of memory that internal memory call function is pointed to, corresponding to region of memory determined by record and region of memory
The stack information of internal memory call function；When being caused using crash by wild pointer, the embodiment of the present invention can determine that
Region of memory pointed by wild pointer, and then from corresponding to the region of memory and region of memory for being recorded
Deposit in the stack information of call function, determine the stack information of the region of memory pointed by wild pointer, obtain open country and refer to
The function stack information of pin, so that it is determined that going out the function call information of the region of memory pointed by wild pointer, be
Positioning is caused using the problem code of crash there is provided possible by wild pointer.
As can be seen that the function stack information of wild pointer provided in an embodiment of the present invention determines method, can pass through
Hook internal memory call functions, record obtain the region of memory operated by internal memory call function, and region of memory
The stack information of corresponding internal memory call function, so as to when being caused using crash by wild pointer, open country can be passed through
Region of memory pointed by pointer, calls from the internal memory corresponding to the region of memory and region of memory for having recorded
In the stack information of function, the function stack information of wild pointer is determined；Wild pointer provided in an embodiment of the present invention
Function stack information determination method, the data record being related to when the internal memory call function of hook is called is wild
The determination of the region of memory pointed by pointer, with the function stack information that wild pointer is searched in recorded data
Operation, when being caused using crash by wild pointer, that is, can determine the function stack information of wild pointer, no
Need to reappear by crash scenes are applied caused by wild pointer, greatly simplify the function stack information for determining wild pointer
During involved process logic so that the determination of the function stack information of wild pointer is relatively simple.
Optionally, internal memory call function is primarily directed to the object of application program and carries out the distribution of region of memory
Operate with release, and when the function of a class is called (such as internal memory call function), finally can all call
To the function of such parent；Therefore the embodiment of the present invention is in hook internal memory call functions, to determine internal memory
During the stack information of call function, can hook parent objects internal memory call function, such as hook parent objects
Memory allocation function and internal memory release function, with when memory allocation function is called each time, it may be determined that go out
The stack information of memory allocation function, when internal memory release function is called each time, it may be determined that go out internal memory release
The stack information of function；
By taking IOS applications as an example, the class of object-C has a parent of oneself, and NSObject is exactly most
Whole parent (NSObject classes are the parents of each object in object-C)；Object-C is being called such as
During the constructed fuction of class, the constructed fuction of NSObject classes will be finally called；Same object-C classes
Release function call, the release function that can be also related to NSObject classes is called；
Therefore in IOS applications, the embodiment of the present invention can hook NSObject objects memory allocation function
(alloc functions), and internal memory release function (dealloc functions) of hook NSObject objects, so as to
In alloc function calls each time, by stack back tracking operation, the stack information of alloc functions is determined, every
During dealloc function call, by stack back tracking operation, the stack information of dealloc functions is determined.
Optionally, internal memory call function can include memory allocation function and internal memory release function, the present invention
Embodiment can hook memory allocation functions, determine the stack information of memory allocation function, the release of hook internal memories
Function, determines that internal memory discharges the stack information of function；Accordingly, the function stack letter of wild pointer determined by
Cease the stack information of the memory allocation function of region of memory that can be pointed by wild pointer, and internal memory release letter
Several stack information；
Based on this, Fig. 2 shows that the function stack information of wild pointer provided in an embodiment of the present invention determines method
Another flow chart, with reference to Fig. 2, the method can include：
Step S200, hook memory allocation function, when memory allocation function is called, to determine internal memory point
Stack information with function；And hook internal memories release function, with when internal memory release function is called, it is determined that interior
Deposit the stack information of release function；
Can determine that by the stack information of memory allocation function, the memory field operated by memory allocation function
Correlation function involved by domain；The stack information for discharging function by internal memory can determine that internal memory discharges letter
Correlation function involved by the operated region of memory of number；
Step S210, the region of memory for determining memory allocation function and internal memory release function sensing, in record
The stack information of region and corresponding memory allocation function is deposited, and internal memory discharges the stack information of function；
Optionally, the embodiment of the present invention can arrange global table, with by global table record region of memory and right
The stack information of the memory allocation function answered, and the stack information of internal memory release function.
Step S220, when being caused using crash by wild pointer, determine the region of memory pointed by wild pointer；
Step S230, from the stack information of the corresponding memory allocation function of region of memory for being recorded, and internal memory
In the stack information of release function, determine that the stack of the memory allocation function of the region of memory pointed by wild pointer is believed
Breath, and the stack information of internal memory release function.
Optionally, Fig. 3 shows the determination side caused by wild pointer using crash provided in an embodiment of the present invention
Method flow chart, with reference to Fig. 3, the method can include：
Step S300, when using crash, analysis using top layer function during crash whether with preset function
Correspondence；
Step S310, if it is determined that corresponding with preset function using top layer function during crash, it is determined that be by
Crash is applied caused by wild pointer.
Preset function can be being caused using top layer function during crash by wild pointer of analyzing in advance；With
As a example by IOS applications, in one implementation, if apply crash, top layer function is
Objc_msgSend, it is determined that be by caused by wild pointer apply crash；In another kind of implementation,
If during using crash, top layer function is objc_release, it is determined that applied by caused by wild pointer
crash；Top layer function objc_msgSend, and objc_release for preset function can preferred form of this.
Optionally, the embodiment of the present invention can also judge to be using abnormal keyword during crash by analysis
It is no by caused by wild pointer apply crash；Fig. 4 show it is provided in an embodiment of the present invention by wild pointer cause should
With another flow chart of the determination method of crash, with reference to Fig. 4, the method can include：
Step S400, when using crash, analysis using abnormal keyword during crash whether with preset pass
Key word correspondence；
Step S410, if it is determined that corresponding with preset keyword using abnormal keyword during crash, it is determined that
Be by caused by wild pointer apply crash.
Preset keyword can be that being caused by wild pointer of analyzing in advance is crucial using exception during crash
Word；By taking IOS applications as an example, abnormal keyword can be unrecognized selector sent to instance
(not selected device is sent to example), if apply crash, abnormal keyword is unrecognized
Selector sent to instance, then can determine that be by caused by wild pointer apply crash.
Optionally, when applying crash caused by by wild pointer, if top layer function is corresponding with preset function,
The embodiment of the present invention can extract the memory field pointed by wild pointer by the corresponding depositor of top layer function
Domain；
Specifically, the embodiment of the present invention can be when using crash, from top layer function corresponding with preset function
Data corresponding with preset function are recognized in corresponding depositor, so as to carry from the data for recognizing
Character feature data corresponding with the region of memory pointed by wild pointer are got, the data visualization for being extracted is
Region of memory pointed by wild pointer；
By taking IOS applications as an example, during using crash, if top layer function is objc_msgSend, can be from top
The data of the region of memory pointed by wild pointer are extracted in the corresponding depositor of layer functions (such as depositor RO),
To realize the determination of the region of memory pointed by wild pointer；During using crash, if top layer function is
Objc_release, then can extract wild pointer institute from the corresponding depositor of top layer function (such as depositor R0)
The data of the region of memory of sensing, to realize the determination of the region of memory pointed by wild pointer；
Optionally, when applying crash caused by by wild pointer, if abnormal keyword and preset keyword pair
Should, then the embodiment of the present invention can parse the region of memory pointed by wild pointer from the abnormal keyword；
Under IOS application scenarios, during using crash, if abnormal keyword is unrecognized selector
Sent to instance 0x1222c0, then the embodiment of the present invention can parse the abnormal keyword, extremely close from this
The region of memory data (0x1222c0) of carrying are extracted in key word, so that it is determined that going out pointed by wild pointer
Region of memory；It should be noted that region of memory 0x1222c0 herein is only used for what is illustrated
Can preferred form of this.
Optionally, it is all in have recorded using running due to the crash log (crash log) for applying
Stack information, can clearly know using operation code situation during crash therefore general by crash log
The problem code using crash can be navigated to by crash log using crash；However, being caused by wild pointer
During using crash, the release of wild pointer necessarily occurs in the synchronization using crash, therefore nothing at present
Method navigates to the problem code caused by wild pointer using crash by crash log；
It is active file of the positioning using the problem code of crash based on crash log, the embodiment of the present invention can be by
Determined by wild pointer function stack information record in crash log so that staff is by wild pointer
When causing using crash, there can be the crash log of the function stack information of wild pointer by record, navigate to open country and refer to
The distribution of the region of memory that pin is pointed to and release code, are caused to apply crash by wild pointer in order to analyze
Problem code；
Optionally, Fig. 5 shows the recorded content of crash log, as shown in figure 5, each line in crash log
Journey has a call stack, and in Fig. 5, uppermost Thread23 is thread sequence number, and Thread23 is presented herein below tune
Use stack；The embodiment of the present invention can by determined by wild pointer function stack information as a thread, it is out of office
The Memory Allocation letter of region of memory pointed by specific wild pointer is recorded under the thread of the function stack information of pointer
Several stack information, and the stack information of internal memory release function, and the setting position of crash log is inserted in (such as crash
The end of log files)；By such setting, then can pass through crash log and the function stack of wild pointer is believed
Breath is parsed as thread, with consistent with current crash log resolution logics, is not required to the function in wild pointer
Make extra work in the parsing of stack information；
Optionally, the thread of the function stack information of the wild pointer being inserted in crash log, can set name
Name (being such as named as mallochistor xx), in order to the function stack of wild pointer is found from crash log
Information；
Specifically, when the function stack information record by wild pointer is in crash files, the embodiment of the present invention
Can in crash log using the function stack information of wild pointer as thread, to set thread described in naming,
The stack information of the memory allocation function of region of memory pointed by wild pointer, and internal memory are recorded under the thread
The stack information of release function.
Preferably, Fig. 6 shows that the function stack information of wild pointer provided in an embodiment of the present invention determines method
Another flow chart, with reference to Fig. 6, the method can include：
The memory allocation function of step S500, hook NSObject objects, and hookNSObject objects
Internal memory discharges function, with when memory allocation function is called, by stack back tracking operation, determines internal memory point
Stack information with function, when internal memory release function is called, by stack back tracking operation, determines that internal memory is released
Put the stack information of function；
Step S510, the region of memory for determining memory allocation function and internal memory release function sensing, in the overall situation
The stack information of region of memory and the corresponding memory allocation function of region of memory, and internal memory release letter are recorded in table
Several stack information；
The stack information of the corresponding memory allocation function of region of memory, and the stack information of internal memory release function, be
Refer to, operate the stack information and internal memory of the memory allocation function of the region of memory to discharge the stack information of function.
Step S520, when using crash, if top layer function be objc_msgSend, it is determined that be by
Crash is applied caused by wild pointer, is extracted from the corresponding depositor of top layer function in pointed by wild pointer
Deposit region；
Optionally, step S520 can be replaced using following manner：When using crash, if top layer function
For objc_release, it is determined that be by crash is applied caused by wild pointer, from the corresponding deposit of top layer function
The region of memory pointed by wild pointer is extracted in device；
Step S520 may also be employed following manner replacement：When using crash, if abnormal keyword is
Unrecognized selector sent to instance, it is determined that be by caused by wild pointer using crash, from
The region of memory pointed by wild pointer is extracted in abnormal keyword；
The stack of step S530, the record region of memory recorded from global table and corresponding memory allocation function
In information, and the stack information of internal memory release function, the internal memory point of the region of memory pointed by wild pointer is determined
Stack information with function, and the stack information of internal memory release function；
Wherein, the stack information of the memory allocation function of the region of memory pointed by wild pointer determined by, and
Internal memory discharges the stack information of function, as the function stack information of wild pointer.
Step S540, in crash log using the function stack information of wild pointer as thread, to set name life
The name thread, records the stack of the memory allocation function of region of memory pointed by wild pointer under the thread
Information, and the stack information of internal memory release function, by the function stack information record of wild pointer in crash log,
The crash log positioning for having the function stack information of wild pointer will pass through record is caused to apply crash by wild pointer
Problem code.
The determination method of the function stack information of wild pointer provided in an embodiment of the present invention, processes logic significantly simple
Change so that the determination of the function stack information of wild pointer is relatively simple.
Below the function stack information determining means of wild pointer provided in an embodiment of the present invention are introduced, under
The function stack information determining means of the wild pointer of text description can be with the function stack information of above-described wild pointer
Determine method mutually to should refer to.
Fig. 7 is the structured flowchart of the function stack information determining means of wild pointer provided in an embodiment of the present invention, should
Device can be applicable to be mounted with the electronic equipment of application, and with reference to Fig. 7, the device can include：
Hook module 100, for hook internal memory call functions, with when internal memory call function is called, really
Determine the stack information of internal memory call function；
Module 200 is determined and recorded, for determining the region of memory of internal memory call function sensing, record institute is really
The stack information of the internal memory call function corresponding to fixed region of memory and region of memory；
Collapse determining module 300, is caused to apply crash by wild pointer for determining；
Region of memory determining module 400 is pointed to, for when being caused using crash by wild pointer, it is determined that wild
Region of memory pointed by pointer；
Stack information determination module 500, for from the internal memory corresponding to the region of memory and region of memory for being recorded
In the stack information of call function, determine the stack information of the region of memory pointed by wild pointer, obtain wild pointer
Function stack information.
Optionally, hook module 100 can pass through the internal memory call function of hook parent objects, to realize hook
Internal memory call function；
Optionally, Fig. 8 shows a kind of alternative construction of hook module provided in an embodiment of the present invention 100,
With reference to Fig. 8, hook module 100 can include：
First hook unit 110, for hook memory allocation functions, with when memory allocation function is called,
Determine the stack information of memory allocation function；
Second hook subelement 120, for hook internal memories discharge function, with call internal memory release function when,
Determine that internal memory discharges the stack information of function；
It is corresponding, the stack information of the region of memory determined by stack information determination module 400 pointed by wild pointer
Can include：The stack information of the memory allocation function of the region of memory pointed by wild pointer, and internal memory release
The stack information of function.
Optionally, Fig. 9 shows a kind of alternative construction of collapse determining module 300, and with reference to Fig. 9, collapse is true
Cover half block 300 can include：
First collapse determining unit 310, for, when using crash, analysis is using top layer function during crash
It is whether corresponding with preset function, however, it is determined that corresponding with preset function using top layer function during crash, then really
Surely be by caused by wild pointer apply crash；
Corresponding, Figure 10 shows a kind of alternative construction for pointing to region of memory determining module 400, reference picture
10, pointing to region of memory determining module 400 can include：
First points to region of memory determining unit 410, during for applying crash caused by by wild pointer, if
Top layer function is corresponding with preset function, then extract wild pointer indication from the corresponding depositor of top layer function
To region of memory.
Optionally, Figure 11 shows the another kind of optional of collapse determining module 300 provided in an embodiment of the present invention
Structure, with reference to Figure 11, collapse determining module 300 can include：
Second breakdown determining unit 320, for, when using crash, analysis is crucial using exception during crash
Whether word is corresponding with preset keyword, however, it is determined that using abnormal keyword during crash and preset keyword pair
Should, it is determined that be by caused by wild pointer apply crash；
Corresponding, Figure 12 shows the another of sensing region of memory determining module provided in an embodiment of the present invention 400
A kind of alternative construction, with reference to Figure 12, pointing to region of memory determining module 400 can include：
Second points to region of memory determining unit 420, during for applying crash caused by by wild pointer,
If abnormal keyword is corresponding with preset keyword, wild pointer indication is parsed from the abnormal keyword
To region of memory.
Optionally, Figure 13 shows the function stack information determining means of wild pointer provided in an embodiment of the present invention
Another structured flowchart, with reference to shown in Fig. 7 and Figure 13, the device can also include：
Logger module 600, for by the function stack information record of the wild pointer for obtaining in crash log.
Optionally, Figure 14 shows a kind of optional knot of logger module provided in an embodiment of the present invention 600
Structure, with reference to Figure 14, logger module 600 can include：
Record performance element 610, in crash log using the function stack information of wild pointer as thread,
To set thread described in naming, the internal memory of wild pointer pointed by region of memory is recorded under the thread
The stack information of partition function, and the stack information of internal memory release function.
The embodiment of the present invention also provides a kind of electronic equipment, the electronic equipment can include it is described above really
Determine the device of the function stack information of wild pointer；Open country is carried out using electronic equipment provided in an embodiment of the present invention to refer to
The determination of the function stack information of pin, is capable of achieving process logic and significantly simplifies, and relatively simple wild pointer
The determination of function stack information.
Electronic equipment provided in an embodiment of the present invention such as mobile phone, panel computer, notebook computer etc. can be used
Family equipment；Figure 15 shows the hardware block diagram of electronic equipment provided in an embodiment of the present invention, reference picture
15, the electronic equipment can include：Processor 1, communication interface 2, memorizer 3 and communication bus 4；
Wherein processor 1, communication interface 2, memorizer 3 complete mutual communication by communication bus 4；
Optionally, communication interface 2 can be the interface of communication module, the such as interface of gsm module；
Processor 1, for configuration processor；
Memorizer 3, for depositing program；
Program can include program code, and described program code includes computer-managed instruction.
The possibly central processor CPU of processor 1, or specific integrated circuit ASIC
(Application Specific Integrated Circuit), or be arranged to implement the embodiment of the present invention
One or more integrated circuits.
Memorizer 3 may include high-speed RAM memorizer, it is also possible to also including nonvolatile memory
(non-volatile memory), for example, at least one disk memory.
Wherein, program can be specifically for：
Hook internal memory call function, when internal memory call function is called, to determine the stack of internal memory call function
Information；
Determine the region of memory that internal memory call function is pointed to, region of memory and region of memory determined by record
The stack information of corresponding internal memory call function；
When application crashes are caused by wild pointer, the region of memory pointed by wild pointer is determined；
From the stack information of the internal memory call function corresponding to the region of memory and region of memory for being recorded, really
Determine the stack information of the region of memory pointed by wild pointer, obtain the function stack information of wild pointer.
In this specification, each embodiment is described by the way of progressive, and each embodiment is stressed
The difference with other embodiment, between each embodiment identical similar portion mutually referring to.
For device disclosed in embodiment, as which corresponds to the method disclosed in Example, so description
It is fairly simple, related part is referring to method part illustration.
Professional further appreciates that, with reference to respectively showing for the embodiments described herein description
The unit and algorithm steps of example, can with electronic hardware, computer software or the two be implemented in combination in,
It is in order to clearly demonstrate the interchangeability of hardware and software, general according to function in the above description
Describe the composition and step of each example.These functions actually with hardware or software mode performing,
Depending on the application-specific and design constraint of technical scheme.Professional and technical personnel can be specific to each
Application using different methods to realize described function, but this realize it is not considered that beyond this
The scope of invention.
With reference to the embodiments described herein description method or directly can use the step of algorithm hardware,
The software module of computing device, or the combination of the two is implementing.Software module can be placed in and deposit at random
Reservoir (RAM), internal memory, read only memory (ROM), electrically programmable ROM, electric erasable can
Well known in programming ROM, depositor, hard disk, moveable magnetic disc, CD-ROM or technical field
In any other form of storage medium.
The foregoing description of the disclosed embodiments, enables professional and technical personnel in the field to realize or use
The present invention.Various modifications to these embodiments will be aobvious and easy for those skilled in the art
See, generic principles defined herein can without departing from the spirit or scope of the present invention,
Realize in other embodiments.Therefore, the present invention is not intended to be limited to the embodiments shown herein,
And it is to fit to the most wide scope consistent with principles disclosed herein and features of novelty.
Claims (10)
1. a kind of function stack information of wild pointer determines method, it is characterised in that include：
Hook internal memory call function, when internal memory call function is called, to determine the stack of internal memory call function
Information；
Determine the region of memory that internal memory call function is pointed to, region of memory and region of memory determined by record
The stack information of corresponding internal memory call function；
When application crashes are caused by wild pointer, the region of memory pointed by wild pointer is determined；
From the stack information of the internal memory call function corresponding to the region of memory and region of memory for being recorded, really
Determine the stack information of the region of memory pointed by wild pointer, obtain the function stack information of wild pointer.
2. the function stack information of wild pointer according to claim 1 determines method, it is characterised in that
The hook internal memory call function includes：The internal memory call function of hook parent object.
3. the function stack information of wild pointer according to claim 1 determines method, it is characterised in that
The hook internal memory call function includes：
Hook memory allocation function, when memory allocation function is called, to determine the stack of memory allocation function
Information；And hook internal memory release function, when internal memory release function is called, to determine internal memory release function
Stack information；
The stack information of the region of memory pointed by the determination wild pointer includes：
Determine the stack information of the memory allocation function of region of memory pointed by wild pointer, and internal memory release letter
Several stack information.
4. the function stack information of the wild pointer according to any one of claim 1-3 determines method, and which is special
Levy and be, it is described to cause the determination process of application crashes to include by wild pointer：
When application crashes, whether top layer function when analyzing application crashes is corresponding with preset function, if really
Top layer function when determining application crashes is corresponding with preset function, it is determined that be by caused by wild pointer using collapsing
Burst；
Or, when application crashes, abnormal keyword when analyzing application crashes whether with preset keyword pair
Should, however, it is determined that abnormal keyword during application crashes is corresponding with preset keyword, it is determined that be by wild pointer
Caused application crashes.
5. the function stack information of wild pointer according to claim 4 determines method, it is characterised in that
Region of memory pointed by the determination wild pointer includes：
Caused by by wild pointer during application crashes, if top layer function is corresponding with preset function, from top layer
The region of memory pointed by wild pointer is extracted in the corresponding depositor of function；
Or, caused by by wild pointer during application crashes, if abnormal keyword is corresponding with preset keyword,
Region of memory wild pointer pointed by is parsed from the abnormal keyword then.
6. the function stack information of wild pointer according to claim 1 determines method, it is characterised in that
Also include：
By the function stack information record of the wild pointer for obtaining in crash log.
7. the function stack information of wild pointer according to claim 6 determines method, it is characterised in that
The function stack information of the wild pointer includes：The memory allocation function of the region of memory pointed by wild pointer
Stack information, and the stack information of internal memory release function；
It is described that the function stack information record of the wild pointer for obtaining is included to crash log：
Using the function stack information of wild pointer as thread in crash log, to set line described in naming
Journey, records the stack information of the memory allocation function of region of memory pointed by wild pointer under the thread, and
Internal memory discharges the stack information of function.
8. function stack information determining means of a kind of wild pointer, it is characterised in that include：
Hook module, for hook internal memory call function, with when internal memory call function is called, it is determined that interior
Deposit the stack information of call function；
Module is determined and recorded, for determining the region of memory of internal memory call function sensing, record is determined
Region of memory and region of memory corresponding to internal memory call function stack information；
Collapse determining module, causes application crashes by wild pointer for determining；
Region of memory determining module is pointed to, for when application crashes are caused by wild pointer, determining wild pointer
Pointed region of memory；
Stack information determination module, for adjusting from the internal memory corresponding to the region of memory and region of memory for being recorded
With in the stack information of function, determine the stack information of the region of memory pointed by wild pointer, obtain wild pointer
Function stack information.
9. function stack information determining means of wild pointer according to claim 8, it is characterised in that
The hook module includes：
First hook unit, for hook memory allocation function, with when memory allocation function is called, really
Determine the stack information of memory allocation function；
Second hook subelement, for hook internal memory discharge function, with call internal memory release function when, really
Determine the stack information that internal memory discharges function；
The function stack information of the wild pointer includes：The Memory Allocation letter of the region of memory pointed by wild pointer
Several stack information, and the stack information of internal memory release function；
Described device also includes：Logger module, remembers for the function stack information by the wild pointer for obtaining
Record in crash log；
The logger module includes：Record performance element, in crash log by wild pointer
Function stack information records wild pointer as thread under the thread to set thread described in naming
The stack information of the memory allocation function of pointed region of memory, and the stack information of internal memory release function.
10. a kind of electronic equipment, it is characterised in that including the wild pointer described in any one of claim 8-9
Function stack information determining means.
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