Add NetBSD specific version of sanitizer_platform_limits_posix

[krytarowski]

Summary

NetBSD is an Open-Source POSIX-like BSD Operating System.

Part of the code inspired by the original work on libsanitizer in GCC 5.4 by Christos Zoulas.

Sponsored by <The NetBSD Foundation>

[kcc]

lib/sanitizer_common/sanitizer_common_interceptors.inc

4117 ↗

(On Diff #112820)

can you use if (SANITIZER_NETBSD) here?

lib/sanitizer_common/sanitizer_linux.h

21 ↗

(On Diff #112820)

No like this.
Instead, please guard the entire file if #if SANITIZER_NETBSD and then include the file w/o #if

[krytarowski]

lib/sanitizer_common/sanitizer_common_interceptors.inc

4117 ↗

(On Diff #112820)

No, as variables like shmctl_shm_info are absent.

[krytarowski]

• replace LP64 check with SANITIZER_WORDSIZE
• restrict sanitizer_platform_limits_netbsd.h to NetBSD with the internal ifdef

[kcc]

lib/sanitizer_common/sanitizer_common_interceptors.inc

4117 ↗

(On Diff #112820)

Please find a way to avoid this #if.

lib/sanitizer_common/sanitizer_platform_limits_netbsd.cc

1 ↗

(On Diff #112940)

fix the comment.

[krytarowski]

g/c:

struct_shm_info_sz;
extern int shmctl_ipc_stat;
extern int shmctl_ipc_info;
extern int shmctl_shm_info;
extern int shmctl_shm_stat;

[krytarowski]

Rename in comments sanitizer_platform_limits_posix.* to sanitizer_platform_limits_netbsd.*

[krytarowski]

Fix the patch, it was accidentally partitioned.

[krytarowski]

lib/sanitizer_common/sanitizer_common_interceptors.inc

4117 ↗

(On Diff #112820)

I will do it.

[krytarowski]

• correct shmctl(2) interception on NetBSD
• remove ifdef in generic code, define unknown values to -1

[krytarowski]

@kcc removed that ifdef (file disappeared as empty diff)

[kcc]

LGTM, thanks!

lib/sanitizer_common/sanitizer_platform_limits_netbsd.h

struct __sanitizer_wordexp_t {
   char *we_strings;
   uptr we_nbytes;
 };
 
 typedef void __sanitizer_FILE;
 #define SANITIZER_HAS_STRUCT_FILE 0
 
 extern unsigned struct_shminfo_sz;
-extern unsigned struct_shm_info_sz;
-extern int shmctl_ipc_stat;
-extern int shmctl_ipc_info;
-extern int shmctl_shm_info;
-extern int shmctl_shm_stat;
 
 extern unsigned struct_utmp_sz;
 extern unsigned struct_utmpx_sz;
 
 extern int map_fixed;
 
 // ioctl arguments
 struct __sanitizer_ifconf {