digitalmars.D.bugs - [Issue 24579] New: stat_t has wrong size for Android armv7a
- d-bugmail puremagic.com (97/97) Jun 02 https://issues.dlang.org/show_bug.cgi?id=24579
https://issues.dlang.org/show_bug.cgi?id=24579 Issue ID: 24579 Summary: stat_t has wrong size for Android armv7a Product: D Version: D2 Hardware: Other OS: Other Status: NEW Severity: normal Priority: P1 Component: druntime Assignee: nobody puremagic.com Reporter: tim.dlang t-online.de struct stat has size 104 for Android armv7a in C, but struct core.sys.posix.sys.stat.stat_t in D has size 88. File testc.c: ``` #include <stdio.h> #include <sys/stat.h> int main() { printf("sizeof(stat_t): %zd\n", sizeof(struct stat)); return 0; } ``` Running `~/Android/Sdk/ndk/26.1.10909125/toolchains/llvm/prebuilt/linux-x86_64/bin/armv7a-linux-androideabi30-clang -g -Wall testc.c -Xclang -fdump-record-layouts` prints the layout of struct stat: ``` *** Dumping AST Record Layout 0 | struct timespec 0 | time_t tv_sec 4 | long tv_nsec | [sizeof=8, align=4] *** Dumping AST Record Layout 0 | struct stat 0 | unsigned long long st_dev 8 | unsigned char[4] __pad0 12 | unsigned long __st_ino 16 | unsigned int st_mode 20 | nlink_t st_nlink 24 | uid_t st_uid 28 | gid_t st_gid 32 | unsigned long long st_rdev 40 | unsigned char[4] __pad3 48 | long long st_size 56 | unsigned long st_blksize 64 | unsigned long long st_blocks 72 | struct timespec st_atim 72 | time_t tv_sec 76 | long tv_nsec 80 | struct timespec st_mtim 80 | time_t tv_sec 84 | long tv_nsec 88 | struct timespec st_ctim 88 | time_t tv_sec 92 | long tv_nsec 96 | unsigned long long st_ino | [sizeof=104, align=8] ``` File test.d: ``` import core.sys.posix.sys.stat; pragma(msg, "stat_t.sizeof: ", stat_t.sizeof); static foreach(i; 0 .. stat_t.init.tupleof.length) { pragma(msg, " ", stat_t.init.tupleof[i].offsetof, " | ", __traits(identifier, stat_t.tupleof[i]), " size=", stat_t.init.tupleof[i].sizeof); } ``` Running `ldc2 -c -mtriple=armv7a--linux-android30 test.d` prints: ``` stat_t.sizeof: 88u 0u | st_dev size=8u 8u | __pad1 size=2u 12u | st_ino size=4u 16u | st_mode size=4u 20u | st_nlink size=4u 24u | st_uid size=4u 28u | st_gid size=4u 32u | st_rdev size=8u 40u | __pad2 size=2u 44u | st_size size=4u 48u | st_blksize size=4u 52u | st_blocks size=4u 56u | st_atime size=4u 60u | st_atimensec size=4u 64u | st_mtime size=4u 68u | st_mtimensec size=4u 72u | st_ctime size=4u 76u | st_ctimensec size=4u 80u | __unused4 size=4u 84u | __unused5 size=4u ``` --
Jun 02