From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 4970 invoked by alias); 12 Jun 2008 19:09:13 -0000 Received: (qmail 4960 invoked by uid 22791); 12 Jun 2008 19:09:11 -0000 X-Spam-Check-By: sourceware.org Received: from rv-out-0708.google.com (HELO rv-out-0708.google.com) (209.85.198.249) by sourceware.org (qpsmtpd/0.31) with ESMTP; Thu, 12 Jun 2008 19:08:55 +0000 Received: by rv-out-0708.google.com with SMTP id b17so3561577rvf.48 for ; Thu, 12 Jun 2008 12:08:53 -0700 (PDT) Received: by 10.141.171.6 with SMTP id y6mr1297690rvo.84.1213297733832; Thu, 12 Jun 2008 12:08:53 -0700 (PDT) Received: by 10.141.18.6 with HTTP; Thu, 12 Jun 2008 12:08:53 -0700 (PDT) Message-ID: Date: Thu, 12 Jun 2008 19:09:00 -0000 From: "Srinivas Murthy" To: "Doug Evans" Subject: Re: gdb doesnt show nptl threads Cc: gdb@sourceware.org In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Content-Disposition: inline References: X-Google-Sender-Auth: 97765439154de947 Mailing-List: contact gdb-help@sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: gdb-owner@sourceware.org X-SW-Source: 2008-06/txt/msg00116.txt.bz2 Guys, Any thoughts on what I might be missing here? Thanks. On Wed, Jun 11, 2008 at 2:38 PM, Srinivas Murthy wrote: > Here's the snapshot of the session (I've attached the code for the > appln "thread" I'm running). I'm building it w/ gcc -Wall > -D_REENTRANT -g -o thread main.c -lpthread). > > > # ls -l /lib64/libpthread > libpthread-2.3.6.so libpthread.so.0 > > # gdb64 thread > GNU gdb 6.6 > Copyright (C) 2006 Free Software Foundation, Inc. > GDB is free software, covered by the GNU General Public License, and you are > welcome to change it and/or distribute copies of it under certain conditions. > Type "show copying" to see the conditions. > There is absolutely no warranty for GDB. Type "show warranty" for details. > This GDB was configured as "x86_64-unknown-linux-gnu"... > Using host libthread_db library "/lib64/libthread_db.so.1". > (gdb) break main > Breakpoint 1 at 0x4006e0: file main.c, line 29. > (gdb) r > Starting program: thread > Failed to read a valid object file image from memory. > > Breakpoint 1, main () at main.c:29 > 29 main.c: No such file or directory. > in main.c > (gdb) n > 30 in main.c > (gdb) n > 29 in main.c > (gdb) > Thread ID1075841376: X is now 1. > Thread ID1075841376: X is now 2. > Thread ID1075841376: X is now 3. > Thread ID1075841376: X is now 4. > Thread ID1075841376: X is now 5. > Thread ID1075841376: X is now 6. > Thread ID1075841376: X is now 7. > Thread ID1075841376: X is now 8. > Thread ID1075841376: X is now 9. > Thread ID1075841376: X is now 10. > 30 in main.c > > (gdb) > Thread ID1075841376: X is now 11. > Thread ID1075841376: X is now 12. > Thread ID1075841376: X is now 13. > Thread ID1075841376: X is now 14. > Thread ID1075841376: X is now 15. > Thread ID1075841376: X is now 16. > Thread ID1075841376: X is now 17. > Thread ID1075841376: X is now 18. > Thread ID1075841376: X is now 19. > Thread ID1075841376: X is now 20. > Thread ID1075841376: X is now 21. > Thread ID1075841376: X is now 22. > Thread ID1075841376: X is now 23. > Thread ID1075841376: X is now 24. > Thread ID1075841376: X is now 25. > Thread ID1075841376: X is now 26. > Thread ID1075841376: X is now 27. > Thread ID1075841376: X is now 28. > Thread ID1075841376: X is now 29. > Thread ID1075841376: X is now 30. > Thread ID1075841376: X is now 31. > Thread ID1075841376: X is now 32. > Thread ID1075841376: X is now 33. > Thread ID1075841376: X is now 34. > Thread ID1075841376: X is now 35. > Thread ID1075841376: X is now 36. > Thread ID1075841376: X is now 37. > Thread ID1075841376: X is now 38. > Thread ID1075841376: X is now 39. > Thread ID1075841376: X is now 40. > Thread ID1075841376: X is now 41. > Thread ID1075841376: X is now 42. > Thread ID1075841376: X is now 43. > Thread ID1075841376: X is now 44. > Thread ID1075841376: X is now 45. > Thread ID1075841376: X is now 46. > Thread ID1075841376: X is now 47. > Thread ID1075841376: X is now 48. > Thread ID1075841376: X is now 49. > Thread ID1075841376: X is now 50. > Thread ID1075841376: X is now 51. > Thread ID1075841376: X is now 52. > Thread ID1075841376: X is now 53. > Thread ID1075841376: X is now 54. > Thread ID1075841376: X is now 55. > Thread ID1075841376: X is now 56. > Thread ID1075841376: X is now 57. > Thread ID1075841376: X is now 58. > Thread ID1075841376: X is now 59. > Thread ID1075841376: X is now 60. > Thread ID1075841376: X is now 61. > Thread ID1075841376: X is now 62. > Thread ID1075841376: X is now 63. > Thread ID1075841376: X is now 64. > Thread ID1075841376: X is now 65. > Thread ID1075841376: X is now 66. > Thread ID1075841376: X is now 67. > Thread ID1075841376: X is now 68. > Thread ID1075841376: X is now 69. > Thread ID1075841376: X is now 70. > Thread ID1075841376: X is now 71. > Thread ID1075841376: X is now 72. > Thread ID1075841376: X is now 73. > Thread ID1075841376: X is now 74. > Thread ID1075841376: X is now 75. > Thread ID1075841376: X is now 76. > Thread ID1075841376: X is now 77. > Thread ID1075841376: X is now 78. > Thread ID1075841376: X is now 79. > Thread ID1075841376: X is now 80. > Thread ID1075841376: X is now 81. > Thread ID1075841376: X is now 82. > Thread ID1075841376: X is now 83. > Thread ID1075841376: X is now 84. > Thread ID1075841376: X is now 85. > Thread ID1075841376: X is now 86. > Thread ID1075841376: X is now 87. > Thread ID1075841376: X is now 88. > Thread ID1075841376: X is now 89. > Thread ID1075841376: X is now 90. > Thread ID1075841376: X is now 91. > Thread ID1075841376: X is now 92. > Thread ID1075841376: X is now 93. > Thread ID1075841376: X is now 94. > Thread ID1075841376: X is now 95. > Thread ID1075841376: X is now 96. > Thread ID1075841376: X is now 97. > Thread ID1075841376: X is now 98. > Thread ID1075841376: X is now 99. > Thread ID1075841376: X is now 100. > Thread ID1075841376: X is now 101. > Thread ID1075841376: X is now 102. > Thread ID1075841376: X is now 103. > Thread ID1075841376: X is now 104. > Thread ID1075841376: X is now 105. > 29 in main.c > (gdb) info threads > (gdb) n > Thread ID1077942624: X is now 106. > Thread ID1077942624: X is now 107. > Thread ID1077942624: X is now 108. > Thread ID1077942624: X is now 109. > Thread ID1077942624: X is now 110. > Thread ID1077942624: X is now 111. > Thread ID1077942624: X is now 112. > Thread ID1077942624: X is now 113. > 30 in main.c > (gdb) n > Thread ID1077942624: X is now 114. > Thread ID1077942624: X is now 115. > Thread ID1077942624: X is now 116. > Thread ID1077942624: X is now 117. > Thread ID1077942624: X is now 118. > Thread ID1077942624: X is now 119. > Thread ID1077942624: X is now 120. > Thread ID1077942624: X is now 121. > Thread ID1077942624: X is now 122. > Thread ID1077942624: X is now 123. > Thread ID1077942624: X is now 124. > Thread ID1077942624: X is now 125. > Thread ID1077942624: X is now 126. > Thread ID1077942624: X is now 127. > Thread ID1077942624: X is now 128. > Thread ID1077942624: X is now 129. > Thread ID1077942624: X is now 130. > Thread ID1077942624: X is now 131. > Thread ID1077942624: X is now 132. > Thread ID1077942624: X is now 133. > Thread ID1077942624: X is now 134. > Thread ID1077942624: X is now 135. > Thread ID1077942624: X is now 136. > Thread ID1075841376: X is now 137. > Thread ID1075841376: X is now 138. > Thread ID1075841376: X is now 139. > Thread ID1075841376: X is now 140. > Thread ID1075841376: X is now 141. > Thread ID1075841376: X is now 142. > Thread ID1075841376: X is now 143. > Thread ID1077942624: X is now 144. > 29 in main.c > (gdb) n > Thread ID1080043872: X is now 145. > Thread ID1080043872: X is now 146. > Thread ID1080043872: X is now 147. > Thread ID1080043872: X is now 148. > Thread ID1080043872: X is now 149. > Thread ID1080043872: X is now 150. > 30 in main.c > (gdb) > Thread ID1080043872: X is now 151. > Thread ID1080043872: X is now 152. > Thread ID1080043872: X is now 153. > Thread ID1077942624: X is now 154. > Thread ID1077942624: X is now 155. > Thread ID1077942624: X is now 156. > Thread ID1077942624: X is now 157. > Thread ID1077942624: X is now 158. > Thread ID1077942624: X is now 159. > Thread ID1077942624: X is now 160. > Thread ID1077942624: X is now 161. > Thread ID1080043872: X is now 162. > Thread ID1080043872: X is now 163. > Thread ID1080043872: X is now 164. > Thread ID1080043872: X is now 165. > Thread ID1080043872: X is now 166. > Thread ID1080043872: X is now 167. > Thread ID1080043872: X is now 168. > Thread ID1080043872: X is now 169. > Thread ID1080043872: X is now 170. > Thread ID1080043872: X is now 171. > Thread ID1080043872: X is now 172. > Thread ID1080043872: X is now 173. > Thread ID1080043872: X is now 174. > Thread ID1080043872: X is now 175. > Thread ID1080043872: X is now 176. > Thread ID1080043872: X is now 177. > Thread ID1080043872: X is now 178. > Thread ID1080043872: X is now 179. > 29 in main.c > (gdb) info threads > (gdb) thread 2 > Thread ID 2 not known. > (gdb) thread 1 > Thread ID 1 not known. > (gdb) thread 1080043872 > Thread ID 1080043872 not known. > (gdb) info threads > > > On Wed, Jun 11, 2008 at 7:58 AM, Doug Evans wrote: >> On Wed, Jun 11, 2008 at 12:19 AM, Srinivas Murthy wrote: >>> Hi, >>> I have the following setup: >>> gdb6.6 built using a 64b glibc w/ nptl enabled >>> 64b glibc - 2.3.6 (nptl enabled) >>> >>> When I use gdb on a sample multi-threaded (nptl) app, I cant get any >>> thread specific gdb cmds to work. >>> >>> For ex. info threads shows only one thread (the main thread). >>> >>> Any idea what might be going wrong? >> >> Unlikely, but one thing that could explain this is the glibc you're >> using is a hand-made one installed in some place other than /lib64. >> gdb will only look for libthread_db in a few specific places. >> >> A copy of the session log from the start up until the error could help >> diagnosis. >> >