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Summary: Adding networking functions from the POSIX standard (2017). This includes functions that deal with sockets from socket.h, netdb.h. In 'socket.h' of some libc implementations (e.g. glibc) with C99, sockaddr parameter is a transparent union of the underlying sockaddr_ family of pointers instead of being a pointer to struct sockaddr. In these cases, the standardized signature will not match, thus we try to match with another signature that has the joker Irrelevant type. In the case of transparent unions, we also not add those constraints which require pointer types for the sockaddr param. Interestingly, in 'netdb.h' sockaddr is not handled as a transparent union. Tags: #clang Differential Revision: https://reviews.llvm.org/D83407
38 lines
2.3 KiB
C++
38 lines
2.3 KiB
C++
// RUN: %clang_analyze_cc1 %s \
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// RUN: -analyzer-checker=core \
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// RUN: -analyzer-checker=apiModeling.StdCLibraryFunctions \
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// RUN: -analyzer-config apiModeling.StdCLibraryFunctions:ModelPOSIX=true \
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// RUN: -analyzer-config apiModeling.StdCLibraryFunctions:DisplayLoadedSummaries=true \
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// RUN: -analyzer-checker=debug.ExprInspection \
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// RUN: -analyzer-config eagerly-assume=false \
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// RUN: -triple i686-unknown-linux 2>&1 | FileCheck %s
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// We test here that functions from socket.h are added when sockaddr is not a
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// transparent union of other sockaddr_ pointers. This is the case in C++.
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// CHECK: Loaded summary for: int accept(int socket, struct sockaddr *address, socklen_t *address_len)
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// CHECK: Loaded summary for: int bind(int socket, const struct sockaddr *address, socklen_t address_len)
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// CHECK: Loaded summary for: int getpeername(int socket, struct sockaddr *address, socklen_t *address_len)
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// CHECK: Loaded summary for: int getsockname(int socket, struct sockaddr *address, socklen_t *address_len)
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// CHECK: Loaded summary for: int connect(int socket, const struct sockaddr *address, socklen_t address_len)
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// CHECK: Loaded summary for: ssize_t recvfrom(int socket, void *buffer, size_t length, int flags, struct sockaddr *address, socklen_t *address_len)
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// CHECK: Loaded summary for: ssize_t sendto(int socket, const void *message, size_t length, int flags, const struct sockaddr *dest_addr, socklen_t dest_len)
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struct sockaddr;
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using socklen_t = unsigned;
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int accept(int socket, struct sockaddr *address, socklen_t *address_len);
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int bind(int socket, const struct sockaddr *address, socklen_t address_len);
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int getpeername(int socket, struct sockaddr *address, socklen_t *address_len);
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int getsockname(int socket, struct sockaddr *address, socklen_t *address_len);
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int connect(int socket, const struct sockaddr *address, socklen_t address_len);
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typedef decltype(sizeof(int)) size_t;
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typedef size_t ssize_t;
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ssize_t recvfrom(int socket, void *buffer, size_t length, int flags, struct sockaddr *address, socklen_t *address_len);
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ssize_t sendto(int socket, const void *message, size_t length, int flags, const struct sockaddr *dest_addr, socklen_t dest_len);
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// Must have at least one call expression to initialize the summary map.
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int bar(void);
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void foo() {
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bar();
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}
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