Semantic analysis of source code using stubs for external references

1. A method comprising:

receiving a set of source code for analysis;

identifying one or more external references to reference code in the set of source code, the reference code not included in the set of source code for analysis;

for each of the one or more external references, retrieving information for the external reference from a code repository corresponding to the external reference;

generating, by a processor, one or more code stubs each corresponding to the one or more external references, each code stub describing a semantic context for the corresponding external reference based on the retrieved information corresponding to the external reference; and

performing analysis of the set of source code and a code stub selected from a set of code stubs responsive to determining that the code stub maximizes a number of types defined in the code stub that match types used in the set of source code.

2. The method of claim 1 , wherein the set of source code and one or more code stubs is analyzed by a code analysis tool without compiling the source code.

3. The method of claim 1 , wherein the one or more code stubs are sufficient to compile the set of source code to an executable but do not implement logic of one or more external references.

4. The method of claim 1 , wherein at least one of the one or more code stubs is generated prior to receiving the set of source code for analysis.

5. The method of claim 4 , wherein the at least one of the one or more code stubs is selected from a set of stubs based on a set of heuristics.

6. The method of claim 1 , wherein the semantic context of a code stub describes a type, field, function, or scope of the corresponding external reference.

7. The method of claim 1 , wherein the semantic context of a code stub describes metadata about a library of the corresponding external reference.

8. A system comprising:

a memory storing instructions; and

a processor, coupled with the memory and to execute the instructions, the instructions when executed cause the processor to:

receive a set of source code for analysis;

identify one or more external references to reference code in the set of source code, the reference code not included in the set of source code for analysis;

for each of the one or more external references, retrieve information for the external reference from a code repository corresponding to the external reference;

generate one or more code stubs each corresponding to the one or more external references, each code stub describing a semantic context for the corresponding external reference based on the retrieved information corresponding to the external reference; and

performing analysis of the set of source code and a code stub selected from a set of code stubs responsive to determining that the code stub maximizes a number of types defined in the code stub that match types used in the set of source code.

9. The system of claim 8 , wherein the set of source code and one or more code stubs is analyzed by a code analysis tool without compiling the source code.

10. The system of claim 8 , wherein the one or more code stubs are sufficient to compile the set of source code to an executable but do not implement logic of one or more external references.

11. The system of claim 8 , wherein at least one of the one or more code stubs is generated prior to receiving the set of source code for analysis.

12. The system of claim 11 , wherein the at least one of the one or more code stubs is selected from a set of stubs based on a set of heuristics.

13. The system of claim 8 , wherein the semantic context of a code stub describes a type, field, function, or scope of the corresponding external reference.

14. The system of claim 8 , wherein the semantic context of a code stub describes metadata about a library of the corresponding external reference.

15. The system of claim 8 , wherein the semantic context of a code stub describes a type, field, function, or scope of the corresponding external reference.

16. A non-transitory computer readable medium comprising stored instructions, which when executed by a processor, cause the processor to:

receive a set of source code for analysis;

identify one or more external references to reference code in the set of source code, the reference code not included in the set of source code for analysis;

for each of the one or more external references, retrieve information for the external reference from a code repository corresponding to the external reference;

generate one or more code stubs each corresponding to the one or more external references, each code stub describing a semantic context for the corresponding external reference based on the retrieved information corresponding to the external reference; and

performing analysis of the set of source code and a code stub selected from a set of code stubs responsive to determining that the code stub maximizes a number of types defined in the code stub that match types used in the set of source code.

17. The non-transitory computer readable medium of claim 16 , wherein the one or more code stubs are sufficient to compile the set of source code to an executable but do not implement logic of one or more external references.

18. The non-transitory computer readable medium of claim 16 , wherein generating the one or more code stubs comprises retrieving information for an external reference from a code repository corresponding to the external reference.

19. The non-transitory computer readable medium of claim 16 , wherein the semantic context of a code stub describes a type, field, function, or scope of the corresponding external reference.

20. The non-transitory computer readable medium of claim 16 , wherein the semantic context of a code stub describes metadata about a library of the corresponding external reference.