You are using arm-none-linux-gnueabi-gcc which is not compatible with the
android toolchain.
This kind of issue is perfectly normal and non supported.
Only trivial programs may correctly work that way, more by chance that
anything else.
On Mon, Nov 17, 2008 at 1:35 PM, allstars <[EMAIL PROTECTED]> wrote:
>
> hello world
> i try to do a simple pthread test on android (natively)
>
> /*========START OF CODE ===============*/
> #include <stdio.h>
> #include <sys/types.h>
> #include <pthread.h>
>
> void *hello(void *arg)
> {
> printf("Hello from node %d\n", *(int *)arg);
> }
>
> int main(int argc, char* argv[])
> {
> int n,i;
> pthread_t threads[2];
>
> n = 2;
>
> /* Start up thread */
> for (i = 0; i < n; i++)
> {
> pthread_create(&threads[i], NULL, hello, (void *)&i);
> }
>
> /* Synchronize the completion of each thread. */
> for (i = 0; i < n; i++)
> {
> pthread_join(threads[i],NULL);
> }
> printf("pthread_test returns \n");
> return 0;
> }
> /*===========END OF CODE=========*/
>
> then i compile it (pthread.c)
> $>arm-none-linux-gnueabi-gcc -c -g pthread.c
> $>arm-none-linux-gnueabi-ld --entry=main --dynamic-linker /system/bin/
> linker -nostdlib -rpath /system/lib -rpath system/lib -L system/lib -
> lc -o pthread_test pthread.o
>
> ./system is the directory of system image
>
>
> but in pthread_join , SIGSEGV will be generated
>
> i use strace to debug this
> # ./strace ./pthread_test
> execve("./pthread_test", ["./pthread_test"], [/* 10 vars */]) = 0
> getpid() = 189
> syscall_983045(0xb00169c4, 0x4990, 0xb0011030, 0, 0x1, 0xbecf6d94,
> 0xbecf6d9c, 0xf0005, 0, 0, 0, 0, 0, 0xbecf6d60, 0xb0000dcd,
> 0xb00015ac, 0x80000010, 0xb00169c4, 0, 0, 0, 0xeb48, 0xcd1f8, 0xcd1d0,
> 0, 0, 0, 0, 0, 0, 0, 0) = 0
> gettid() = 189
> sigaction(SIGILL, {0xb0001211, [], SA_RESTART}, {SIG_DFL}, 0) = 0
> sigaction(SIGABRT, {0xb0001211, [], SA_RESTART}, {SIG_DFL}, 0) = 0
> sigaction(SIGBUS, {0xb0001211, [], SA_RESTART}, {SIG_DFL}, 0) = 0
> sigaction(SIGFPE, {0xb0001211, [], SA_RESTART}, {SIG_DFL}, 0) = 0
> sigaction(SIGSEGV, {0xb0001211, [], SA_RESTART}, {SIG_DFL}, 0) = 0
> sigaction(SIGSTKFLT, {0xb0001211, [], SA_RESTART}, {SIG_DFL}, 0) = 0
> open("libc.so", O_RDONLY|O_LARGEFILE) = -1 ENOENT (No such file or
> directory)
> open("/system/lib/libc.so", O_RDONLY|O_LARGEFILE) = 3
> lseek(3, 0, SEEK_SET) = 0
> read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0(\0\1\0\0\0`
> \225\0\000"..., 4096) = 4096
> lseek(3, -8, SEEK_END) = 227472
> read(3, "\0\0\340\257PRE ", 8) = 8
> mmap2(0xafe00000, 274432, PROT_READ|PROT_EXEC, MAP_PRIVATE|
> MAP_ANONYMOUS, -1, 0) = 0xafe00000
> mmap2(0xafe00000, 214032, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_FIXED,
> 3, 0) = 0xafe00000
> mprotect(0xafe00000, 217088, PROT_READ|PROT_WRITE|PROT_EXEC) = 0
> mmap2(0xafe35000, 8420, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED,
> 3, 0x35) = 0xafe35000
> mmap2(0xafe38000, 41760, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|
> MAP_ANONYMOUS, -1, 0) = 0xafe38000
> close(3) = 0
> mprotect(0xafe00000, 217088, PROT_READ|PROT_EXEC) = 0
> getuid32() = 0
> geteuid32() = 0
> open("/dev/urandom", O_RDONLY|O_LARGEFILE) = 3
> read(3, "%\374\353\364", 4) = 4
> close(3) = 0
> mprotect(0x8000, 4096, PROT_READ|PROT_EXEC) = 0
> getuid32() = 0
> geteuid32() = 0
> brk(0) = 0x11000
> brk(0x11000) = 0x11000
> brk(0x12000) = 0x12000
> mmap2(0x10000000, 1048576, PROT_READ|PROT_WRITE, MAP_PRIVATE|
> MAP_ANONYMOUS|MAP_NORESERVE, -1, 0) = 0x10000000
> mprotect(0x10000000, 4096, PROT_NONE) = 0
> clone(child_stack=0x100fff00, flags=CLONE_VM|CLONE_FS|CLONE_FILES|
> CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_DETACHED) = 190
> futex(0x100fff00, FUTEX_WAKE, 1Hello from node 0
> ) = 1
> mmap2(0x10000000, 1048576, PROT_READ|PROT_WRITE, MAP_PRIVATE|
> MAP_ANONYMOUS|MAP_NORESERVE, -1, 0) = 0x10000000
> mprotect(0x10000000, 4096, PROT_NONE) = 0
> clone(child_stack=0x100fff00, flags=CLONE_VM|CLONE_FS|CLONE_FILES|
> CLONE_SIGHAND|CLONE_THREAD|CLONE_SYSVSEM|CLONE_DETACHED) = 191
> futex(0x100fff00, FUTEX_WAKE, 1Hello from node 1
> ) = 1
> --- SIGSEGV (Segmentation fault) @ 0 (4) ---
> sigaction(SIGUSR1, {SIG_IGN}, {SIG_DFL}, 0) = 0
> gettid() = 189
> SYS_281(0x1, 0x1, 0, 0xffffe52c, 0xb000f55c) = 3
> SYS_283(0x3, 0xbecf69b6, 0x14, 0x1, 0x3) = 0
> write(3, "\275\0\0\0", 4) = 4
> read(3, 0xbecf6a54, 1) = ? ERESTARTSYS (To be
> restarted)
> --- SIGCONT (Continued) @ 0 (0) ---
> read(3, "", 1) = 0
> close(3) = 0
> sigaction(SIGSEGV, {SIG_IGN}, {0xb0001211, [], SA_RESTART}, 0) = 0
> sigreturn() = ? (mask now [])
> --- SIGSEGV (Segmentation fault) @ 0 (4) ---
> +++ killed by SIGSEGV +++
>
>
>
>
> so i would like to ask why pthread_join here will always generate
> SIGSEGV???
>
> thanks
>
> >
>
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