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Diffstat (limited to 'doc/gawk.info')
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1 files changed, 238 insertions, 203 deletions
diff --git a/doc/gawk.info b/doc/gawk.info index 889a2a86..9fba2e1f 100644 --- a/doc/gawk.info +++ b/doc/gawk.info @@ -21584,12 +21584,12 @@ File: gawk.info, Node: Debugger, Next: Arbitrary Precision Arithmetic, Prev: It would be nice if computer programs worked perfectly the first time they were run, but in real life, this rarely happens for programs of any complexity. Thus, most programming languages have facilities available -for "debugging" programs, and now 'awk' is no exception. +for "debugging" programs, and 'awk' is no exception. The 'gawk' debugger is purposely modeled after the GNU Debugger (GDB) (https://www.gnu.org/software/gdb/) command-line debugger. If you are -familiar with GDB, learning how to use 'gawk' for debugging your program -is easy. +familiar with GDB, learning how to use 'gawk' for debugging your +programs is easy. * Menu: @@ -21726,7 +21726,12 @@ instructions. is easy to lose sight of everything that is going on "inside" each line of 'awk' code. The debugger provides the opportunity to look at the individual primitive instructions carried out by the higher-level 'awk' -commands. +commands.(1) + + ---------- Footnotes ---------- + + (1) The "primitive instructions" are defined by 'gawk' itself; the +debugger does not work at the level of machine instructions. File: gawk.info, Node: Sample Debugging Session, Next: List of Debugger Commands, Prev: Debugging, Up: Debugger @@ -21736,7 +21741,7 @@ File: gawk.info, Node: Sample Debugging Session, Next: List of Debugger Comman In order to illustrate the use of 'gawk' as a debugger, let's look at a sample debugging session. We will use the 'awk' implementation of the -POSIX 'uniq' command described earlier (*note Uniq Program::) as our +POSIX 'uniq' command presented earlier (*note Uniq Program::) as our example. * Menu: @@ -21783,9 +21788,8 @@ File: gawk.info, Node: Finding The Bug, Prev: Debugger Invocation, Up: Sample ---------------------- Let's say that we are having a problem using (a faulty version of) -'uniq.awk' in the "field-skipping" mode, and it doesn't seem to be -catching lines which should be identical when skipping the first field, -such as: +'uniq.awk' in "field-skipping" mode, and it doesn't seem to be catching +lines which should be identical when skipping the first field, such as: awk is a wonderful program! gawk is a wonderful program! @@ -33625,7 +33629,7 @@ Index (line 6) * break debugger command: Breakpoint Control. (line 11) * break statement: Break Statement. (line 6) -* breakpoint: Debugging Terms. (line 33) +* breakpoint (debugger): Debugging Terms. (line 33) * breakpoint at location, how to delete: Breakpoint Control. (line 36) * breakpoint commands: Debugger Execution Control. (line 10) @@ -33684,6 +33688,7 @@ Index (line 44) * call by value: Pass By Value/Reference. (line 15) +* call stack (debugger): Debugging Terms. (line 10) * call stack, display in debugger: Execution Stack. (line 13) * caret (^), in bracket expressions: Bracket Expressions. (line 25) * caret (^), regexp operator: Regexp Operators. (line 22) @@ -33942,6 +33947,7 @@ Index * dcngettext() function (gawk), portability and: I18N Portability. (line 33) * deadlocks: Two-way I/O. (line 53) +* debugger capabilities: Debugging Concepts. (line 16) * debugger commands, b (break): Breakpoint Control. (line 11) * debugger commands, backtrace: Execution Stack. (line 13) * debugger commands, break: Breakpoint Control. (line 11) @@ -34039,15 +34045,41 @@ Index * debugger commands, watch: Viewing And Changing Data. (line 66) * debugger commands, where (backtrace): Execution Stack. (line 13) +* debugger concepts: Debugging Terms. (line 6) * debugger default list amount: Debugger Info. (line 69) * debugger history file: Debugger Info. (line 81) * debugger history size: Debugger Info. (line 65) * debugger options: Debugger Info. (line 57) * debugger prompt: Debugger Info. (line 78) +* debugger, b command: Finding The Bug. (line 32) +* debugger, backtrace command: Finding The Bug. (line 52) +* debugger, break command: Finding The Bug. (line 32) +* debugger, breakpoint command: Finding The Bug. (line 32) +* debugger, bt command: Finding The Bug. (line 52) +* debugger, command completion: Readline Support. (line 6) +* debugger, history expansion: Readline Support. (line 6) * debugger, how to start: Debugger Invocation. (line 6) +* debugger, instruction tracing: Debugger Info. (line 90) +* debugger, limitations: Limitations. (line 6) +* debugger, n command: Finding The Bug. (line 105) +* debugger, next command: Finding The Bug. (line 105) +* debugger, p command: Finding The Bug. (line 68) +* debugger, print command: Finding The Bug. (line 68) +* debugger, printing all array elements: Finding The Bug. (line 154) +* debugger, printing single array elements: Finding The Bug. (line 140) +* debugger, prompt: Debugger Invocation. (line 23) * debugger, read commands from a file: Debugger Info. (line 97) +* debugger, repeating commands: List of Debugger Commands. + (line 21) +* debugger, run command: Finding The Bug. (line 39) +* debugger, running the program: Finding The Bug. (line 39) +* debugger, save commands to a file: Debugger Info. (line 92) +* debugger, setting a breakpoint: Finding The Bug. (line 32) +* debugger, show stack frames: Finding The Bug. (line 52) * debugging awk programs: Debugger. (line 6) * debugging gawk, bug reports: Bugs. (line 9) +* debugging, example session: Sample Debugging Session. + (line 6) * decimal point character, locale specific: Options. (line 282) * decrement operators: Increment Ops. (line 35) * default keyword: Switch Statement. (line 6) @@ -34254,6 +34286,8 @@ Index * evaluation order, concatenation: Concatenation. (line 41) * evaluation order, functions: Calling Built-in. (line 30) * examining fields: Fields. (line 6) +* example debugging session: Sample Debugging Session. + (line 6) * exclamation point (!), ! operator: Boolean Ops. (line 69) * exclamation point (!), ! operator <1>: Precedence. (line 51) * exclamation point (!), ! operator <2>: Egrep Program. (line 174) @@ -35817,7 +35851,7 @@ Index * square brackets ([]), regexp operator: Regexp Operators. (line 56) * square root: Numeric Functions. (line 78) * srand: Numeric Functions. (line 82) -* stack frame: Debugging Terms. (line 10) +* stack frame (debugger): Debugging Terms. (line 10) * Stallman, Richard: Manual History. (line 6) * Stallman, Richard <1>: Acknowledgments. (line 18) * Stallman, Richard <2>: Contributors. (line 24) @@ -36100,7 +36134,7 @@ Index * warnings, issuing: Options. (line 198) * watch debugger command: Viewing And Changing Data. (line 66) -* watchpoint: Debugging Terms. (line 42) +* watchpoint (debugger): Debugging Terms. (line 42) * wc utility: Wc Program. (line 6) * wc.awk program: Wc Program. (line 46) * Weinberger, Peter: History. (line 17) @@ -36527,197 +36561,198 @@ Ref: I18N Example-Footnote-1873616 Node: Gawk I18N873689 Node: I18N Summary874334 Node: Debugger875675 -Node: Debugging876698 -Node: Debugging Concepts877139 -Node: Debugging Terms878948 -Node: Awk Debugging881523 -Node: Sample Debugging Session882429 -Node: Debugger Invocation882963 -Node: Finding The Bug884349 -Node: List of Debugger Commands890827 -Node: Breakpoint Control892160 -Node: Debugger Execution Control895854 -Node: Viewing And Changing Data899216 -Node: Execution Stack902590 -Node: Debugger Info904227 -Node: Miscellaneous Debugger Commands908298 -Node: Readline Support913360 -Node: Limitations914256 -Node: Debugging Summary916365 -Node: Arbitrary Precision Arithmetic917644 -Node: Computer Arithmetic919129 -Ref: table-numeric-ranges922895 -Ref: table-floating-point-ranges923388 -Ref: Computer Arithmetic-Footnote-1924046 -Node: Math Definitions924103 -Ref: table-ieee-formats927419 -Ref: Math Definitions-Footnote-1928022 -Node: MPFR features928127 -Node: FP Math Caution929845 -Ref: FP Math Caution-Footnote-1930917 -Node: Inexactness of computations931286 -Node: Inexact representation932246 -Node: Comparing FP Values933606 -Node: Errors accumulate934847 -Node: Getting Accuracy936280 -Node: Try To Round938990 -Node: Setting precision939889 -Ref: table-predefined-precision-strings940586 -Node: Setting the rounding mode942416 -Ref: table-gawk-rounding-modes942790 -Ref: Setting the rounding mode-Footnote-1946721 -Node: Arbitrary Precision Integers946900 -Ref: Arbitrary Precision Integers-Footnote-1950075 -Node: Checking for MPFR950224 -Node: POSIX Floating Point Problems951698 -Ref: POSIX Floating Point Problems-Footnote-1955983 -Node: Floating point summary956021 -Node: Dynamic Extensions958211 -Node: Extension Intro959764 -Node: Plugin License961030 -Node: Extension Mechanism Outline961827 -Ref: figure-load-extension962266 -Ref: figure-register-new-function963831 -Ref: figure-call-new-function964923 -Node: Extension API Description966985 -Node: Extension API Functions Introduction968627 -Node: General Data Types974167 -Ref: General Data Types-Footnote-1982528 -Node: Memory Allocation Functions982827 -Ref: Memory Allocation Functions-Footnote-1987037 -Node: Constructor Functions987136 -Node: Registration Functions990722 -Node: Extension Functions991407 -Node: Exit Callback Functions996622 -Node: Extension Version String997872 -Node: Input Parsers998535 -Node: Output Wrappers1011256 -Node: Two-way processors1015768 -Node: Printing Messages1018033 -Ref: Printing Messages-Footnote-11019204 -Node: Updating ERRNO1019357 -Node: Requesting Values1020096 -Ref: table-value-types-returned1020833 -Node: Accessing Parameters1021769 -Node: Symbol Table Access1023004 -Node: Symbol table by name1023516 -Node: Symbol table by cookie1025305 -Ref: Symbol table by cookie-Footnote-11029490 -Node: Cached values1029554 -Ref: Cached values-Footnote-11033090 -Node: Array Manipulation1033243 -Ref: Array 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table-predefined-precision-strings940750 +Node: Setting the rounding mode942580 +Ref: table-gawk-rounding-modes942954 +Ref: Setting the rounding mode-Footnote-1946885 +Node: Arbitrary Precision Integers947064 +Ref: Arbitrary Precision Integers-Footnote-1950239 +Node: Checking for MPFR950388 +Node: POSIX Floating Point Problems951862 +Ref: POSIX Floating Point Problems-Footnote-1956147 +Node: Floating point summary956185 +Node: Dynamic Extensions958375 +Node: Extension Intro959928 +Node: Plugin License961194 +Node: Extension Mechanism Outline961991 +Ref: figure-load-extension962430 +Ref: figure-register-new-function963995 +Ref: figure-call-new-function965087 +Node: Extension API Description967149 +Node: Extension API Functions Introduction968791 +Node: General Data Types974331 +Ref: General Data Types-Footnote-1982692 +Node: Memory Allocation Functions982991 +Ref: Memory Allocation Functions-Footnote-1987201 +Node: Constructor Functions987300 +Node: Registration Functions990886 +Node: 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+Node: Extension summary1113815 +Node: Extension Exercises1117517 +Node: Language History1119015 +Node: V7/SVR3.11120671 +Node: SVR41122823 +Node: POSIX1124257 +Node: BTL1125637 +Node: POSIX/GNU1126366 +Node: Feature History1132144 +Node: Common Extensions1148003 +Node: Ranges and Locales1149286 +Ref: Ranges and Locales-Footnote-11153902 +Ref: Ranges and Locales-Footnote-21153929 +Ref: Ranges and Locales-Footnote-31154164 +Node: Contributors1154385 +Node: History summary1160330 +Node: Installation1161710 +Node: Gawk Distribution1162654 +Node: Getting1163138 +Node: Extracting1164101 +Node: Distribution contents1165739 +Node: Unix Installation1172219 +Node: Quick Installation1172901 +Node: Shell Startup Files1175315 +Node: Additional Configuration Options1176404 +Node: Configuration Philosophy1178697 +Node: Non-Unix Installation1181066 +Node: PC Installation1181526 +Node: PC Binary Installation1182364 +Node: PC Compiling1182799 +Node: PC Using1183916 +Node: Cygwin1187131 +Node: 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