Mercurial > hg > nginx-quic
annotate src/os/unix/rfork_thread.S @ 5993:5b549cc7f698
SSL: reset ready flag if recv(MSG_PEEK) found no bytes in socket.
Previously, connection hung after calling ngx_http_ssl_handshake() with
rev->ready set and no bytes in socket to read. It's possible in at least the
following cases:
- when processing a connection with expired TCP_DEFER_ACCEPT on Linux
- after parsing PROXY protocol header if it arrived in a separate TCP packet
Thanks to James Hamlin.
author | Roman Arutyunyan <arut@nginx.com> |
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date | Mon, 02 Mar 2015 21:15:46 +0300 |
parents | d620f497c50f |
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rev | line source |
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1 |
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2 /* |
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3 * Copyright (C) Igor Sysoev |
4412 | 4 * Copyright (C) Nginx, Inc. |
441
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5 */ |
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6 |
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8 #include <sys/syscall.h> |
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9 #include <machine/asm.h> |
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10 |
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11 /* |
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12 * rfork_thread(3) - rfork_thread(flags, stack, func, arg); |
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13 */ |
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14 |
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15 #define KERNCALL int $0x80 |
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16 |
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17 ENTRY(rfork_thread) |
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18 push %ebp |
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19 mov %esp, %ebp |
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20 push %esi |
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21 |
483 | 22 mov 12(%ebp), %esi # the thread stack address |
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23 |
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24 sub $4, %esi |
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25 mov 20(%ebp), %eax # the thread argument |
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26 mov %eax, (%esi) |
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27 |
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28 sub $4, %esi |
483 | 29 mov 16(%ebp), %eax # the thread start address |
267
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30 mov %eax, (%esi) |
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31 |
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32 push 8(%ebp) # rfork(2) flags |
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33 push $0 |
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34 mov $SYS_rfork, %eax |
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35 KERNCALL |
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36 jc error |
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37 |
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38 cmp $0, %edx |
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39 jne child |
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40 |
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41 parent: |
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42 add $8, %esp |
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43 pop %esi |
483 | 44 leave |
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45 ret |
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46 |
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47 child: |
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48 mov %esi, %esp |
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49 pop %eax |
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50 call *%eax # call a thread start address ... |
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51 add $4, %esp |
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52 |
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53 push %eax |
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54 push $0 |
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55 mov $SYS_exit, %eax # ... and exit(2) after a thread would return |
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56 KERNCALL |
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57 |
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58 error: |
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59 add $8, %esp |
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60 pop %esi |
483 | 61 leave |
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62 PIC_PROLOGUE |
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63 |
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64 /* libc's cerror: jmp PIC_PLT(HIDENAME(cerror)) */ |
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65 |
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66 push %eax |
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67 call PIC_PLT(CNAME(__error)) |
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68 pop %ecx |
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69 PIC_EPILOGUE |
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70 mov %ecx, (%eax) |
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71 mov $-1, %eax |
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72 mov $-1, %edx |
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73 ret |