- Valgrind Invalid File Descriptor In Syscall Closed
- Valgrind Invalid File Descriptor In Syscall Closer
- Valgrind Invalid File Descriptor In Syscall Closed
- Valgrind Invalid File Descriptor In Syscall Close
- Valgrind Invalid File Descriptor In Syscall Close Command
Valgrind spec file. GitHub Gist: instantly share code, notes, and snippets. This shows up as a Valgrind warning 18197 Warning: invalid file descriptor -1 in syscall close 18197 at 0x5F6E5BD:??? (syscall-template.S:84) 18197. MARS maintains file descriptors internally and allocates them starting with 3. File descriptors 0, 1 and 2 are always open for: reading from standard input, writing to standard output, and writing to standard error, respectively (new in release 4.3). .Valgrind is a runtime analysis tool, unlike cppcheckparasoft here you must run the buggy code in order to detect issues.If you are using other libraries, Valgrind will warn you about issues found there, errors you might not able to, or don’t want to fix.
This shows up as a Valgrind warning
18197 Warning: invalid file descriptor -1 in syscall close()
18197 at 0x5F6E5BD: ??? (syscall-template.S:84)
18197 by 0xF95F34: inline_mysql_socket_close (mysql_socket.h:1090)
18197 by 0xF96AF3: vio_shutdown (viosocket.c:490)
18197 by 0x7C6BE0: THD::disconnect() (sql_class.cc:2057)
18197 by 0x637486: close_connection(THD*, unsigned int) (mysqld.cc:2886)
18197 by 0x7D63E3: do_handle_one_connection(THD*) (sql_connect.cc:1547)
18197 by 0x7D5E57: handle_one_connection (sql_connect.cc:1444)
18197 by 0xB98416: pfs_spawn_thread (pfs.cc:1860)
18197 by 0x5F656F9: start_thread (pthread_create.c:333)
18197 by 0x6B22B5C: clone (clone.S:109)
on e.g.
rpl.rpl_semi_sync_shutdown_hang 'mix' [ fail ] Found warnings/errors in server log file!
rpl.rpl_gtid_mts_relay_log_recovery_auto_pos_on_off 'mix' w3 [ fail ] Found warnings/errors in server log file!
rpl.rpl_report_port 'mix' w1 [ fail ] Found warnings/errors in server log file!
rpl.rpl_recovery_replicate_same_server_id 'mix' w4 [ fail ] Found warnings/errors in server log file!
rpl.rpl_change_master_crash_safe 'mix' w2 [ fail ] Found warnings/errors in server log file!
rpl.rpl_change_master 'mix' w1 [ fail ] Found warnings/errors in server log file!
rpl.rpl_alter_repository 'mix' w3 [ fail ] Found warnings/errors in server log file!
rpl.rpl_gtid_deployment_step 'mix' w1 [ fail ] Found warnings/errors in server log file!
rpl.rpl_recovery_replicate_same_server_id 'row' w4 [ fail ] Found warnings/errors in server log file!
main.mysql_client_test w4 [ fail ] Found warnings/errors in server log file!
auth_sec.mysql_native_plugin w3 [ fail ] Found warnings/errors in server log file!
The reason is that THD::disconnect is getting called twice, once from server thread-killing thread:
kill_server_threads -> kill_server -> close_connections -> close_connection -> THD::disconnect;
and the second time from the query thread itself, as in the above stacktrace.
IntroSettingsSyscallsIDEDebuggingCommandToolsHistoryLimitationsException HandlersMacrosAcknowledgementsMARS home
SYSCALL functions available in MARS
Introduction
A number of system services, mainly for input and output, are available for use by your MIPS program. They are described in the table below.
MIPS register contents are not affected by a system call, except for result registers as specified in the table below.
How to use SYSCALL system services
Step 1. Load the service number in register $v0.Step 2. Load argument values, if any, in $a0, $a1, $a2, or $f12 as specified.
Step 3. Issue the SYSCALL instruction.
Step 4. Retrieve return values, if any, from result registers as specified.
Example: display the value stored in $t0 on the console
Table of Available Services
| Service | Code in $v0 | Arguments | Result |
|---|---|---|---|
| print integer | 1 | $a0 = integer to print | |
| print float | 2 | $f12 = float to print | |
| print double | 3 | $f12 = double to print | |
| print string | 4 | $a0 = address of null-terminated string to print | |
| read integer | 5 | $v0 contains integer read | |
| read float | 6 | $f0 contains float read | |
| read double | 7 | $f0 contains double read | |
| read string | 8 | $a0 = address of input buffer $a1 = maximum number of characters to read | See note below table |
| sbrk (allocate heap memory) | 9 | $a0 = number of bytes to allocate | $v0 contains address of allocated memory |
| exit (terminate execution) | 10 | ||
| print character | 11 | $a0 = character to print | See note below table |
| read character | 12 | $v0 contains character read | |
| open file | 13 | $a0 = address of null-terminated string containing filename $a1 = flags $a2 = mode | $v0 contains file descriptor (negative if error). See note below table |
| read from file | 14 | $a0 = file descriptor $a1 = address of input buffer $a2 = maximum number of characters to read | $v0 contains number of characters read (0 if end-of-file, negative if error). See note below table |
| write to file | 15 | $a0 = file descriptor $a1 = address of output buffer $a2 = number of characters to write | $v0 contains number of characters written (negative if error). See note below table |
| close file | 16 | $a0 = file descriptor | |
| exit2 (terminate with value) | 17 | $a0 = termination result | See note below table |
| Services 1 through 17 are compatible with the SPIM simulator, other than Open File (13) as described in the Notes below the table. Services 30 and higher are exclusive to MARS. | |||
| time (system time) | 30 | $a0 = low order 32 bits of system time $a1 = high order 32 bits of system time. See note below table | |
| MIDI out | 31 | $a0 = pitch (0-127) $a1 = duration in milliseconds $a2 = instrument (0-127) $a3 = volume (0-127) | Generate tone and return immediately. See note below table |
| sleep | 32 | $a0 = the length of time to sleep in milliseconds. | Causes the MARS Java thread to sleep for (at least) the specified number of milliseconds. This timing will not be precise, as the Java implementation will add some overhead. |
| MIDI out synchronous | 33 | $a0 = pitch (0-127) $a1 = duration in milliseconds $a2 = instrument (0-127) $a3 = volume (0-127) | Generate tone and return upon tone completion. See note below table |
| print integer in hexadecimal | 34 | $a0 = integer to print | Displayed value is 8 hexadecimal digits, left-padding with zeroes if necessary. |
| print integer in binary | 35 | $a0 = integer to print | Displayed value is 32 bits, left-padding with zeroes if necessary. |
| print integer as unsigned | 36 | $a0 = integer to print | Displayed as unsigned decimal value. |
| (not used) | 37-39 | ||
| set seed | 40 | $a0 = i.d. of pseudorandom number generator (any int). $a1 = seed for corresponding pseudorandom number generator. | No values are returned. Sets the seed of the corresponding underlying Java pseudorandom number generator (java.util.Random). See note below table |
| random int | 41 | $a0 = i.d. of pseudorandom number generator (any int). | $a0 contains the next pseudorandom, uniformly distributed int value from this random number generator's sequence. See note below table |
| random int range | 42 | $a0 = i.d. of pseudorandom number generator (any int). $a1 = upper bound of range of returned values. | $a0 contains pseudorandom, uniformly distributed int value in the range 0 <= [int] < [upper bound], drawn from this random number generator's sequence. See note below table |
| random float | 43 | $a0 = i.d. of pseudorandom number generator (any int). | $f0 contains the next pseudorandom, uniformly distributed float value in the range 0.0 <= f < 1.0 from this random number generator's sequence. See note below table |
| random double | 44 | $a0 = i.d. of pseudorandom number generator (any int). | $f0 contains the next pseudorandom, uniformly distributed double value in the range 0.0 <= f < 1.0 from this random number generator's sequence. See note below table |
| (not used) | 45-49 | ||
| ConfirmDialog | 50 | $a0 = address of null-terminated string that is the message to user | $a0 contains value of user-chosen option 0: Yes 1: No 2: Cancel |
| InputDialogInt | 51 | $a0 = address of null-terminated string that is the message to user | $a0 contains int read $a1 contains status value 0: OK status -1: input data cannot be correctly parsed -2: Cancel was chosen -3: OK was chosen but no data had been input into field |
| InputDialogFloat | 52 | $a0 = address of null-terminated string that is the message to user | $f0 contains float read $a1 contains status value 0: OK status -1: input data cannot be correctly parsed -2: Cancel was chosen -3: OK was chosen but no data had been input into field |
| InputDialogDouble | 53 | $a0 = address of null-terminated string that is the message to user | $f0 contains double read $a1 contains status value 0: OK status -1: input data cannot be correctly parsed -2: Cancel was chosen -3: OK was chosen but no data had been input into field |
| InputDialogString | 54 | $a0 = address of null-terminated string that is the message to user $a1 = address of input buffer $a2 = maximum number of characters to read | See Service 8 note below table $a1 contains status value 0: OK status. Buffer contains the input string. -2: Cancel was chosen. No change to buffer. -3: OK was chosen but no data had been input into field. No change to buffer. -4: length of the input string exceeded the specified maximum. Buffer contains the maximum allowable input string plus a terminating null. |
| MessageDialog | 55 | $a0 = address of null-terminated string that is the message to user $a1 = the type of message to be displayed: 0: error message, indicated by Error icon 1: information message, indicated by Information icon 2: warning message, indicated by Warning icon 3: question message, indicated by Question icon other: plain message (no icon displayed) | N/A |
| MessageDialogInt | 56 | $a0 = address of null-terminated string that is an information-type message to user $a1 = int value to display in string form after the first string | N/A |
| MessageDialogFloat | 57 | $a0 = address of null-terminated string that is an information-type message to user $f12 = float value to display in string form after the first string | N/A |
| MessageDialogDouble | 58 | $a0 = address of null-terminated string that is an information-type message to user $f12 = double value to display in string form after the first string | N/A |
| MessageDialogString | 59 | $a0 = address of null-terminated string that is an information-type message to user $a1 = address of null-terminated string to display after the first string | N/A |
NOTES: Services numbered 30 and higher are not provided by SPIM
Service 8 - Follows semantics of UNIX 'fgets'. For specified length n, string can be no longer than n-1. If less than that, adds newline to end. In either case, then pads with null byte If n = 1, input is ignored and null byte placed at buffer address. If n < 1, input is ignored and nothing is written to the buffer.
Service 11 - Prints ASCII character corresponding to contents of low-order byte.
Service 13 - MARS implements three flag values: 0 for read-only, 1 for write-only with create, and 9 for write-only with create and append. It ignores mode. The returned file descriptor will be negative if the operation failed. The underlying file I/O implementation uses java.io.FileInputStream.read() to read and java.io.FileOutputStream.write()
to write. MARS maintains file descriptors internally and allocates them starting with 3. File descriptors 0, 1 and 2 are always open for: reading from standard input, writing to standard output, and writing to standard error, respectively (new in release 4.3). 
Services 13,14,15 - In MARS 3.7, the result register was changed to $v0 for SPIM compatability. It was previously $a0 as erroneously printed in Appendix B of Computer Organization and Design,.
Service 17 - If the MIPS program is run under control of the MARS graphical interface (GUI), the exit code in $a0 is ignored.
Valgrind Invalid File Descriptor In Syscall Closed
Service 30 - System time comes from java.util.Date.getTime() as milliseconds since 1 January 1970.
Services 31,33 - Simulate MIDI output through sound card. Details below.
Services 40-44 use underlying Java pseudorandom number generators provided by the java.util.Random class. Each stream (identified by $a0 contents) is modeled by a different Random object. There are no default seed values, so use the Set Seed service (40) if replicated random sequences are desired.
Valgrind Invalid File Descriptor In Syscall Closer
Example of File I/O
The sample MIPS program below will open a new file for writing, write text to it from a memory buffer, then close it. The file will be created in the directory in which MARS was run.Using SYSCALL system services 31 and 33: MIDI output
These system services are unique to MARS, and provide a means of producing sound. MIDI output is simulated by your system sound card, and the simulation is provided by the javax.sound.midi package.Valgrind Invalid File Descriptor In Syscall Closed
Service 31 will generate the tone then immediately return. Service 33 will generate the tone then sleep for the tone's duration before returning. Thus it essentially combines services 31 and 32.
This service requires four parameters as follows:Valgrind Invalid File Descriptor In Syscall Close
pitch ($a0) | ||||||||||||||||||||||||||||||||
duration in milliseconds ($a1) | ||||||||||||||||||||||||||||||||
instrument ($a2)
| ||||||||||||||||||||||||||||||||
volume ($a3) |