------------------------------------------------------------------------------ -- -- -- GNAT COMPILER COMPONENTS -- -- -- -- D E B U G -- -- -- -- B o d y -- -- -- -- Copyright (C) 1992-2018, Free Software Foundation, Inc. -- -- -- -- GNAT is free software; you can redistribute it and/or modify it under -- -- terms of the GNU General Public License as published by the Free Soft- -- -- ware Foundation; either version 3, or (at your option) any later ver- -- -- sion. GNAT is distributed in the hope that it will be useful, but WITH- -- -- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY -- -- or FITNESS FOR A PARTICULAR PURPOSE. -- -- -- -- As a special exception under Section 7 of GPL version 3, you are granted -- -- additional permissions described in the GCC Runtime Library Exception, -- -- version 3.1, as published by the Free Software Foundation. -- -- -- -- You should have received a copy of the GNU General Public License and -- -- a copy of the GCC Runtime Library Exception along with this program; -- -- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see -- -- . -- -- -- -- GNAT was originally developed by the GNAT team at New York University. -- -- Extensive contributions were provided by Ada Core Technologies Inc. -- -- -- ------------------------------------------------------------------------------ package body Debug is --------------------------------- -- Summary of Debug Flag Usage -- --------------------------------- -- Debug flags for compiler (GNAT1) -- da Generate messages tracking semantic analyzer progress -- db Show encoding of type names for debug output -- dc List names of units as they are compiled -- dd Dynamic allocation of tables messages generated -- de List the entity table -- df Full tree/source print (includes withed units) -- dg Print source from tree (generated code only) -- dh Generate listing showing loading of name table hash chains -- di Generate messages for visibility linking/delinking -- dj Suppress "junk null check" for access parameter values -- dk Generate GNATBUG message on abort, even if previous errors -- dl Generate unit load trace messages -- dm Prevent special frontend inlining in GNATprove mode -- dn Generate messages for node/list allocation -- do Print source from tree (original code only) -- dp Generate messages for parser scope stack push/pops -- dq No auto-alignment of small records -- dr Generate parser resynchronization messages -- ds Print source from tree (including original and generated stuff) -- dt Print full tree -- du Uncheck categorization pragmas -- dv Output trace of overload resolution -- dw Print trace of semantic scope stack -- dx Force expansion on, even if no code being generated -- dy Print tree of package Standard -- dz Print source of package Standard -- dA All entities included in representation information output -- dB Output debug encoding of type names and variants -- dC Output debugging information on check suppression -- dD Delete elaboration checks in inner level routines -- dE Apply elaboration checks to predefined units -- dF Perform the new SPARK checking rules for pointer aliasing -- dG Generate all warnings including those normally suppressed -- dH Hold (kill) call to gigi -- dI Inhibit internal name numbering in gnatG listing -- dJ Prepend subprogram name in messages -- dK Kill all error messages -- dL Ignore external calls from instances for elaboration -- dM Assume all variables are modified (no current values) -- dN No file name information in exception messages -- dO Output immediate error messages -- dP Do not check for controlled objects in preelaborable packages -- dQ Use old secondary stack method -- dR Bypass check for correct version of s-rpc -- dS Never convert numbers to machine numbers in Sem_Eval -- dT Convert to machine numbers only for constant declarations -- dU Enable garbage collection of unreachable entities -- dV Enable viewing of all symbols in debugger -- dW Disable warnings on calls for IN OUT parameters -- dX Display messages on reads of potentially uninitialized scalars -- dY Enable configurable run-time mode -- dZ Generate listing showing the contents of the dispatch tables -- d.a Force Target_Strict_Alignment mode to True -- d.b Dump backend types -- d.c Generate inline concatenation, do not call procedure -- d.d Disable atomic synchronization -- d.e Enable atomic synchronization -- d.f Inhibit folding of static expressions -- d.g Enable conversion of raise into goto -- d.h Minimize the creation of public internal symbols for concatenation -- d.i Ignore Warnings pragmas -- d.j Generate listing of frontend inlined calls -- d.k Kill referenced run-time library unit line numbers -- d.l Use Ada 95 semantics for limited function returns -- d.m For -gnatl, print full source only for main unit -- d.n Print source file names -- d.o Conservative elaboration order for indirect calls -- d.p Use original Ada 95 semantics for Bit_Order (disable AI95-0133) -- d.q Suppress optimizations on imported 'in' -- d.r Disable reordering of components in record types -- d.s Strict secondary stack management -- d.t Disable static allocation of library level dispatch tables -- d.u Enable Modify_Tree_For_C (update tree for c) -- d.v Enforce SPARK elaboration rules in SPARK code -- d.w Do not check for infinite loops -- d.x No exception handlers -- d.y Disable implicit pragma Elaborate_All on task bodies -- d.z Restore previous support for frontend handling of Inline_Always -- d.A Read/write Aspect_Specifications hash table to tree -- d.B Generate a bug box on abort_statement -- d.C Generate concatenation call, do not generate inline code -- d.D Disable errors on use of overriding keyword in Ada 95 mode -- d.E Turn selected errors into warnings -- d.F Debug mode for GNATprove -- d.G Ignore calls through generic formal parameters for elaboration -- d.H GNSA mode for ASIS -- d.I Do not ignore enum representation clauses in CodePeer mode -- d.J Relaxed rules for pragma No_Return -- d.K Enable generation of contract-only procedures in CodePeer mode -- d.L Depend on back end for limited types in if and case expressions -- d.M Relaxed RM semantics -- d.N Add node to all entities -- d.O Dump internal SCO tables -- d.P Previous (non-optimized) handling of length comparisons -- d.Q Previous (incomplete) style check for binary operators -- d.R Restrictions in ali files in positional form -- d.S Force Optimize_Alignment (Space) -- d.T Force Optimize_Alignment (Time) -- d.U Ignore indirect calls for static elaboration -- d.V Do not verify validity of SCIL files (CodePeer mode) -- d.W Print out debugging information for Walk_Library_Items -- d.X Old treatment of indexing aspects -- d.Y -- d.Z Do not enable expansion in configurable run-time mode -- d_a Stop elaboration checks on accept or select statement -- d_b -- d_c -- d_d -- d_e Ignore entry calls and requeue statements for elaboration -- d_f -- d_g -- d_h -- d_i Ignore activations and calls to instances for elaboration -- d_j -- d_k -- d_l -- d_m -- d_n -- d_o -- d_p Ignore assertion pragmas for elaboration -- d_q -- d_r -- d_s Stop elaboration checks on synchronous suspension -- d_t -- d_u -- d_v -- d_w -- d_x -- d_y -- d_z -- d_A -- d_B -- d_C -- d_D -- d_E -- d_F -- d_G -- d_H -- d_I -- d_J -- d_K -- d_L Output trace information on elaboration checking -- d_M -- d_N -- d_O -- d_P -- d_Q -- d_R -- d_S -- d_T -- d_U -- d_V -- d_W -- d_X -- d_Y -- d_Z -- d1 Error msgs have node numbers where possible -- d2 Eliminate error flags in verbose form error messages -- d3 Dump bad node in Comperr on an abort -- d4 Inhibit automatic krunch of predefined library unit files -- d5 Debug output for tree read/write -- d6 Default access unconstrained to thin pointers -- d7 Suppress version/source stamp/compilation time for -gnatv/-gnatl -- d8 Force opposite endianness in packed stuff -- d9 Allow lock free implementation -- d.1 Enable unnesting of nested procedures -- d.2 Allow statements in declarative part -- d.3 Output debugging information from Exp_Unst -- d.4 Do not delete generated C file in case of errors -- d.5 Do not generate imported subprogram definitions in C code -- d.6 Do not avoid declaring unreferenced types in C code -- d.7 Disable unsound heuristics in gnat2scil (for CP as SPARK prover) -- d.8 -- d.9 Disable build-in-place for nonlimited types -- d_1 -- d_2 -- d_3 -- d_4 -- d_5 -- d_6 -- d_7 -- d_8 -- d_9 -- Debug flags for binder (GNATBIND) -- da All links (including internal units) listed if there is a cycle -- db Output information from Better_Choice -- dc List units as they are chosen -- dd -- de Elaboration dependencies including system units -- df -- dg -- dh -- di Ignore_Errors mode for reading ali files -- dj -- dk -- dl -- dm -- dn List details of manipulation of Num_Pred values -- do Use older preference for elaboration order -- dp Use old preference for elaboration order -- dq -- dr -- ds -- dt -- du List units as they are acquired -- dv Verbose debugging printouts -- dw -- dx Force binder to read xref information from ali files -- dy -- dz -- Debug flags used in package Make and its clients (e.g. GNATMAKE) -- da -- db -- dc -- dd -- de -- df Only output file names, not path names, in log -- dg -- dh Generate listing showing loading of name table hash chains -- di -- dj -- dk -- dl -- dm Display the number of maximum simultaneous compilations -- dn Do not delete temp files created by gnatmake -- do -- dp Prints the contents of the Q used by Make.Compile_Sources -- dq Prints source files as they are enqueued and dequeued -- dr -- ds -- dt Display time stamps when there is a mismatch -- du List units as their ali files are acquired -- dv -- dw Prints the list of units withed by the unit currently explored -- dx -- dy -- dz -------------------------------------------- -- Documentation for Compiler Debug Flags -- -------------------------------------------- -- da Generate messages tracking semantic analyzer progress. A message -- is output showing each node as it gets analyzed, expanded, -- resolved, or evaluated. This option is useful for finding out -- exactly where a bomb during semantic analysis is occurring. -- db In Exp_Dbug, certain type names are encoded to include debugging -- information. This debug switch causes lines to be output showing -- the encodings used. -- dc List names of units as they are compiled. One line of output will -- be generated at the start of compiling each unit (package or -- subprogram). -- dd Dynamic allocation of tables messages generated. Each time a -- table is reallocated, a line is output indicating the expansion. -- de List the entity table -- df Full tree/source print (includes withed units). Normally the tree -- output (dt) or recreated source output (dg,do,ds) includes only -- the main unit. If df is set, then the output in either case -- includes all compiled units (see also dg,do,ds,dt). Note that to -- be effective, this switch must be used in combination with one or -- more of dt, dg, do or ds. -- dg Print the source recreated from the generated tree. In the case -- where the tree has been rewritten this output includes only the -- generated code, not the original code (see also df,do,ds,dz). -- This flag differs from -gnatG in that the output also includes -- non-source generated null statements, and freeze nodes, which -- are normally omitted in -gnatG mode. -- dh Generates a table at the end of a compilation showing how the hash -- table chains built by the Namet package are loaded. This is useful -- in ensuring that the hashing algorithm (in Namet.Hash) is working -- effectively with typical sets of program identifiers. -- di Generate messages for visibility linking/delinking -- dj Suppress "junk null check" for access parameters. This flag permits -- Ada programs to pass null parameters to access parameters, and to -- explicitly check such access values against the null literal. -- Neither of these is valid Ada, but both were allowed in versions of -- GNAT before 3.10, so this switch can ease the transition process. -- dk Immediate kill on abort. Normally on an abort (i.e. a call to -- Comperr.Compiler_Abort), the GNATBUG message is not given if -- there is a previous error. This debug switch bypasses this test -- and gives the message unconditionally (useful for debugging). -- dl Generate unit load trace messages. A line of traceback output is -- generated each time a request is made to the library manager to -- load a new unit. -- dm Prevent special frontend inlining in GNATprove mode. In some cases, -- some subprogram calls are inlined in GNATprove mode in order to -- facilitate formal verification. This debug switch prevents that -- inlining to happen. -- dn Generate messages for node/list allocation. Each time a node or -- list header is allocated, a line of output is generated. Certain -- other basic tree operations also cause a line of output to be -- generated. This option is useful in seeing where the parser is -- blowing up. -- do Print the source recreated from the generated tree. In the case -- where the tree has been rewritten, this output includes only the -- original code, not the generated code (see also df,dg,ds,dz). -- dp Generate messages for parser scope stack push/pops. A line of -- output by the parser each time the parser scope stack is either -- pushed or popped. Useful in debugging situations where the -- parser scope stack ends up incorrectly synchronized -- dq In layout version 1.38, 2002/01/12, a circuit was implemented -- to give decent default alignment to short records that had no -- specific alignment set. This debug option restores the previous -- behavior of giving such records poor alignments, typically 1. -- This may be useful in dealing with transition. -- dr Generate parser resynchronization messages. Normally the parser -- resynchronizes quietly. With this debug option, two messages -- are generated, one when the parser starts a resynchronization -- skip, and another when it resumes parsing. Useful in debugging -- inadequate error recovery situations. -- ds Print the source recreated from the generated tree. In the case -- where the tree has been rewritten this output includes both the -- generated code and the original code with the generated code -- being enlosed in curly brackets (see also df,do,ds,dz) -- dt Print full tree. The generated tree is output (see also df,dy) -- du Uncheck categorization pragmas. This debug switch causes the -- elaboration control pragmas (Pure, Preelaborate, etc.) and the -- categorization pragmas (Shared_Passive, Remote_Types, etc.) to be -- ignored, so that normal checks are not made (this is particularly -- useful for adding temporary debugging code to units that have -- pragmas that are inconsistent with the debugging code added). -- dv Output trace of overload resolution. Outputs messages for -- overload attempts that involve cascaded errors, or where -- an interpretation is incompatible with the context. -- dw Write semantic scope stack messages. Each time a scope is created -- or removed, a message is output (see the Sem_Ch8.Push_Scope and -- Sem_Ch8.Pop_Scope subprograms). -- dx Force expansion on, even if no code being generated. Normally the -- expander is inhibited if no code is generated. This switch forces -- expansion to proceed normally even if the backend is not being -- called. This is particularly useful for debugging purposes when -- using the front-end only version of the compiler (which normally -- would never do any expansion). -- dy Print tree of package Standard. Normally the tree print out does -- not include package Standard, even if the -df switch is set. This -- switch forces output of the internal tree built for Standard. -- dz Print source of package Standard. Normally the source print out -- does not include package Standard, even if the -df switch is set. -- This switch forces output of the source recreated from the internal -- tree built for Standard. Note that this differs from -gnatS in -- that it prints from the actual tree using the normal Sprint -- circuitry for printing trees. -- dA Forces output of representation information, including full -- information for all internal type and object entities, as well -- as all user defined type and object entities including private -- and incomplete types. This debug switch also automatically sets -- the equivalent of -gnatRm. -- dB Output debug encodings for types and variants. See Exp_Dbug for -- exact form of the generated output. -- dC Output trace information showing the decisions made during -- check suppression activity in unit Checks. -- dD Delete new elaboration checks. This flag causes GNAT to return -- to the 3.13a elaboration semantics, and to suppress the fixing -- of two bugs. The first is in the context of inner routines in -- dynamic elaboration mode, when the subprogram we are in was -- called at elaboration time by a unit that was also compiled with -- dynamic elaboration checks. In this case, if A calls B calls C, -- and all are in different units, we need an elaboration check at -- each call. These nested checks were only put in recently (see -- version 1.80 of Sem_Elab) and we provide this debug flag to -- revert to the previous behavior in case of regressions. The -- other behavior reverted by this flag is the treatment of the -- Elaborate_Body pragma in static elaboration mode. This used to -- be treated as not needing elaboration checking, but in fact in -- general Elaborate_All is still required because of nested calls. -- dE Apply compile time elaboration checking for with relations between -- predefined units. Normally no checks are made. -- dF Perform the new SPARK checking rules for pointer aliasing. This is -- only activated in GNATprove mode and on SPARK code. These rules are -- not yet part of the official SPARK language, but are expected to be -- included in a future version of SPARK. -- dG Generate all warnings. Normally Errout suppresses warnings on -- units that are not part of the main extended source, and also -- suppresses warnings on instantiations in the main extended -- source that duplicate warnings already posted on the template. -- This switch stops both kinds of deletion and causes Errout to -- post all warnings sent to it. -- dH Inhibit call to gigi. This is useful for testing front end data -- layout, and may be useful in other debugging situations where -- you do not want gigi to intefere with the testing. -- dI Inhibit internal name numbering in gnatDG listing. Any sequence of -- the form appearing in -- a name is replaced by .... This -- is used in the fixed bugs run to minimize system and version -- dependency in filed -gnatD or -gnatG output. -- dJ Prepend the name of the enclosing subprogram in compiler messages -- (errors, warnings, style checks). This is useful in particular to -- integrate compiler warnings in static analysis tools such as -- CodePeer. -- dK Kill all error messages. This debug flag suppresses the output -- of all error messages. It is used in regression tests where the -- error messages are target dependent and irrelevant. -- dL The compiler ignores calls in instances and invoke subprograms -- which are external to the instance for both the static and dynamic -- elaboration models. -- dM Assume all variables have been modified, and ignore current value -- indications. This debug flag disconnects the tracking of constant -- values (see Exp_Ch2.Expand_Current_Value). -- dN Do not generate file name information in exception messages -- dO Output immediate error messages. This causes error messages to -- be output as soon as they are generated (disconnecting several -- circuits for improvement of messages, deletion of duplicate -- messages etc). Useful to diagnose compiler bombs caused by -- erroneous handling of error situations -- dP Do not check for controlled objects in preelaborable packages. -- RM 10.2.1(9) forbids the use of library level controlled objects -- in preelaborable packages, but this restriction is a huge pain, -- especially in the predefined library units. -- dQ Use old method for determining what goes on the secondary stack. -- This disables some newer optimizations. The intent is to use this -- temporarily to measure before/after efficiency. ???Remove this -- when we are done (see Sem_Util.Requires_Transient_Scope). -- dR Bypass the check for a proper version of s-rpc being present -- to use the -gnatz? switch. This allows debugging of the use -- of stubs generation without needing to have GLADE (or some -- other PCS installed). -- dS Omit conversion of fpt numbers to exact machine numbers in -- non-static evaluation contexts (see Check_Non_Static_Context). -- This is intended for testing out timing problems with this -- conversion circuit. -- dT Similar to dS, but omits the conversions only in the case where -- the parent is not a constant declaration. -- dU Enable garbage collection of unreachable entities. This enables -- both the reachability analysis and changing the Is_Public and -- Is_Eliminated flags. -- dV Enable viewing of all symbols in debugger. Causes debug information -- to be generated for all symbols, including internal symbols. This -- is enabled by default for -gnatD, but this switch allows this to -- be enabled without generating modified source files. Note that the -- use of -gnatdV ensures in the dwarf/elf case that all symbols that -- are present in the elf tables are also in the dwarf tables (which -- seems to be required by some tools). Another effect of dV is to -- generate full qualified names, including internal names generated -- for blocks and loops. -- dW Disable warnings when a possibly uninitialized scalar value is -- passed to an IN OUT parameter of a procedure. This usage is a -- quite improper bounded error [erroneous in Ada 83] situation, -- and would normally generate a warning. However, to ease the -- task of transitioning incorrect legacy code, we provide this -- undocumented feature for suppressing these warnings. -- dY Enable configurable run-time mode, just as though the System file -- had Configurable_Run_Time_Mode set to True. This is useful in -- testing high integrity mode. -- dZ Generate listing showing the contents of the dispatch tables. Each -- line has an internally generated number used for references between -- tagged types and primitives. For each primitive the output has the -- following fields: -- -- - Letter 'P' or letter 's': The former indicates that this -- primitive will be located in a primary dispatch table. The -- latter indicates that it will be located in a secondary -- dispatch table. -- -- - Name of the primitive. In case of predefined Ada primitives -- the text "(predefined)" is added before the name, and these -- acronyms are used: SR (Stream_Read), SW (Stream_Write), SI -- (Stream_Input), SO (Stream_Output), DA (Deep_Adjust), DF -- (Deep_Finalize). In addition Oeq identifies the equality -- operator, and "_assign" the assignment. -- -- - If the primitive covers interface types, two extra fields -- referencing other primitives are generated: "Alias" references -- the primitive of the tagged type that covers an interface -- primitive, and "AI_Alias" references the covered interface -- primitive. -- -- - The expression "at #xx" indicates the slot of the dispatch -- table occupied by such primitive in its corresponding primary -- or secondary dispatch table. -- -- - In case of abstract subprograms the text "is abstract" is -- added at the end of the line. -- d.a Force Target_Strict_Alignment to True, even on targets where it -- would normally be false. Can be used for testing strict alignment -- circuitry in the compiler. -- d.b Dump back end types. During Create_Standard, the back end is -- queried for all available types. This option shows them. -- d.c Generate inline concatenation, instead of calling one of the -- System.Concat_n.Str_Concat_n routines in cases where the latter -- routines would normally be called. -- d.d Disable atomic synchronization for all atomic variable references. -- Pragma Enable_Atomic_Synchronization is ignored. -- d.e Enable atomic synchronization for all atomic variable references. -- Pragma Disable_Atomic_Synchronization is ignored, and also the -- compiler switch -gnated is ignored. -- d.f Suppress folding of static expressions. This of course results -- in seriously non-conforming behavior, but is useful sometimes -- when tracking down handling of complex expressions. -- d.g Enables conversion of a raise statement into a goto when the -- relevant handler is statically determinable. For now we only try -- this if this debug flag is set. Later we will enable this more -- generally by default. -- d.h Minimize the creation of public internal symbols for concatenation -- by enforcing a secondary stack-like handling of the final result. -- The target of the concatenation is thus constrained in place and -- initialized with the result instead of acting as its alias. -- d.i Ignore all occurrences of pragma Warnings in the sources. This can -- be used in particular to disable Warnings (Off) to check if any of -- these statements are inappropriate. -- d.k If an error message contains a reference to a location in an -- internal unit, then suppress the line number in this reference. -- d.j Generate listing of frontend inlined calls and inline calls passed -- to the backend. This is useful to locate skipped calls that must be -- inlined by the frontend. -- d.l Use Ada 95 semantics for limited function returns. This may be -- used to work around the incompatibility introduced by AI-318-2. -- It is useful only in Ada 2005 and later. -- d.m When -gnatl is used, the normal output includes full listings of -- all files in the extended main source (body/spec/subunits). If this -- debug switch is used, then the full listing is given only for the -- main source (this corresponds to a previous behavior of -gnatl and -- is used for running the ACATS tests). -- d.n Print source file names as they are loaded. This is useful if the -- compiler has a bug -- these are the files that need to be included -- in a bug report. -- d.o Conservative elaboration order for indirect calls. This causes -- P'Access to be treated as a call in more cases. -- d.p In Ada 95 (or 83) mode, use original Ada 95 behavior for the -- interpretation of component clauses crossing byte boundaries when -- using the non-default bit order (i.e. ignore AI95-0133). -- d.q If an array variable or constant is not modified in Ada code, and -- is passed to an 'in' parameter of a foreign-convention subprogram, -- and that subprogram modifies the array, the Ada compiler normally -- assumes that the array is not modified. This option suppresses such -- optimizations. This option should not be used; the correct solution -- is to declare the parameter 'in out'. -- d.r Do not reorder components in record types. -- d.s The compiler no longer attempts to optimize the calls to secondary -- stack management routines SS_Mark and SS_Release. As a result, each -- transient block tasked with secondary stack management will fulfill -- its role unconditionally. -- d.s The compiler does not generate calls to secondary stack management -- routines SS_Mark and SS_Release for a transient block when there is -- an enclosing scoping construct which already manages the secondary -- stack. -- d.t The compiler has been modified (a fairly extensive modification) -- to generate static dispatch tables for library level tagged types. -- This debug switch disables this modification and reverts to the -- previous dynamic construction of tables. It is there as a possible -- work around if we run into trouble with the new implementation. -- d.u Sets Modify_Tree_For_C mode in which tree is modified to make it -- easier to generate code using a C compiler. -- d.v This flag enforces the elaboration rules defined in the SPARK -- Reference Manual, chapter 7.7, to all SPARK code within a unit. As -- a result, constructs which violate the rules in chapter 7.7 are no -- longer accepted, even if the implementation is able to statically -- ensure that accepting these constructs does not introduce the -- possibility of failing an elaboration check. -- d.w This flag turns off the scanning of loops to detect possible -- infinite loops. -- d.x No exception handlers in generated code. This causes exception -- handlers to be eliminated from the generated code. They are still -- fully compiled and analyzed, they just get eliminated from the -- code generation step. -- d.y Disable implicit pragma Elaborate_All on task bodies. When a task -- body calls a procedure in the same package, and that procedure -- calls a procedure in another package, the static elaboration -- machinery adds an implicit Elaborate_All on the other package. This -- switch disables the addition of the implicit pragma in such cases. -- d.z Restore previous front-end support for Inline_Always. In default -- mode, for targets that use the GCC back end, Inline_Always is -- handled by the back end. Use of this switch restores the previous -- handling of Inline_Always by the front end on such targets. For the -- targets that do not use the GCC back end, this switch is ignored. -- d.A There seems to be a problem with ASIS if we activate the circuit -- for reading and writing the aspect specification hash table, so -- for now, this is controlled by the debug flag d.A. The hash table -- is only written and read if this flag is set. -- d.B Generate a bug box when we see an abort_statement, even though -- there is no bug. Useful for testing Comperr.Compiler_Abort: write -- some code containing an abort_statement, and compile it with -- -gnatd.B. There is nothing special about abort_statements; it just -- provides a way to control where the bug box is generated. See "when -- N_Abort_Statement" in package body Expander. -- d.C Generate call to System.Concat_n.Str_Concat_n routines in cases -- where we would normally generate inline concatenation code. -- d.D For compatibility with some Ada 95 compilers implementing only -- one feature of Ada 2005 (overriding keyword), disable errors on use -- of overriding keyword in Ada 95 mode. -- d.E Turn selected errors into warnings. This debug switch causes a -- specific set of error messages into warnings. Setting this switch -- causes Opt.Error_To_Warning to be set to True. The intention is -- that this be used for messages representing upwards incompatible -- changes to Ada 2012 that cause previously correct programs to be -- treated as illegal now. The following cases are affected: -- -- Errors relating to overlapping subprogram parameters for cases -- other than IN OUT parameters to functions. -- -- Errors relating to the new rules about not defining equality -- too late so that composition of equality can be assured. -- -- Errors relating to overriding indicators on protected subprogram -- bodies (not an Ada 2012 incompatibility, but might cause errors -- for existing programs assuming they were legal because GNAT -- formerly allowed them). -- d.F Sets GNATprove_Mode to True. This allows debugging the frontend in -- the special mode used by GNATprove. -- d.G Previously the compiler ignored calls via generic formal parameters -- when doing the analysis for the static elaboration model. This is -- now fixed, but we provide this debug flag to revert to the previous -- situation of ignoring such calls to aid in transition. -- d.H Sets ASIS_GNSA_Mode to True. This signals the front end to suppress -- the call to gigi in ASIS_Mode. -- d.I Do not ignore enum representation clauses in CodePeer mode. -- The default of ignoring representation clauses for enumeration -- types in CodePeer is good for the majority of Ada code, but in some -- cases being able to change this default might be useful to remove -- some false positives. -- d.J Relaxed rules for pragma No_Return. A pragma No_Return is illegal -- if it applies to a body. This switch disables the legality check -- for that. If the procedure does in fact return normally, execution -- is erroneous, and therefore unpredictable. -- d.K Enable generation of contract-only procedures in CodePeer mode and -- report a warning on subprograms for which the contract-only body -- cannot be built. Currently reported on subprograms defined in -- nested package specs that have some formal (or return type) whose -- type is a private type defined in some enclosing package and that -- have pre/postconditions. -- d.L Normally the front end generates special expansion for conditional -- expressions of a limited type. This debug flag removes this special -- case expansion, leaving it up to the back end to handle conditional -- expressions correctly. -- d.M Relaxed RM semantics. This flag sets Opt.Relaxed_RM_Semantics -- See Opt.Relaxed_RM_Semantics for more details. -- d.N Enlarge entities by one node (but don't attempt to use this extra -- node for storage of any flags or fields). This can be used to do -- experiments on the impact of increasing entity sizes. -- d.O Dump internal SCO tables. Before outputting the SCO information to -- the ALI file, the internal SCO tables (SCO_Table/SCO_Unit_Table) -- are dumped for debugging purposes. -- d.P Previous non-optimized handling of length comparisons. Setting this -- flag inhibits the effect of Optimize_Length_Comparison in Exp_Ch4. -- This is there in case we find a situation where the optimization -- malfunctions, to provide a work around. -- d.Q Previous incomplete style checks for binary operators. Style checks -- for token separation rules were incomplete and have been made -- compliant with the documentation. For example, no warning was -- issued for expressions such as 16-One or "A"&"B". Setting this flag -- inhibits these new checks. -- d.R As documented in lib-writ.ads, restrictions in the ali file can -- have two forms, positional and named. The named notation is the -- current preferred form, but the use of this debug switch will force -- the use of the obsolescent positional form. -- d.S Force Optimize_Alignment (Space) mode as the default -- d.T Force Optimize_Alignment (Time) mode as the default -- d.U Ignore indirect calls for static elaboration. The static -- elaboration model is conservative, especially regarding indirect -- calls. If you say Proc'Access, it will assume you might call -- Proc. This can cause elaboration cycles at bind time. This flag -- reverts to the behavior of earlier compilers, which ignored -- indirect calls. -- d.V Do not verify the validity of SCIL files (CodePeer mode). When -- generating SCIL files for CodePeer, by default we verify that the -- SCIL is well formed before saving it on disk. This switch can be -- used to disable this checking, either to improve speed or to shut -- down a false positive detected during the verification. -- d.W Print out debugging information for Walk_Library_Items, including -- the order in which units are walked. This is primarily for use in -- debugging CodePeer mode. -- d.X A previous version of GNAT allowed indexing aspects to be redefined -- on derived container types, while the default iterator was -- inherited from the parent type. This nonstandard extension is -- preserved temporarily for use by the modeling project under debug -- flag d.X. -- d.Z Normally we always enable expansion in configurable run-time mode -- to make sure we get error messages about unsupported features even -- when compiling in -gnatc mode. But expansion is turned off in this -- case if debug flag -gnatd.Z is used. This is to deal with the case -- where we discover difficulties in this new processing. -- d_a The compiler stops the examination of a task body once it reaches -- an accept or select statement for the static elaboration model. The -- behavior is similar to that of No_Entry_Calls_In_Elaboration_Code, -- but does not penalize actual entry calls in elaboration code. -- d_e The compiler ignores simple entry calls, asynchronous transfer of -- control, conditional entry calls, timed entry calls, and requeue -- statements in both the static and dynamic elaboration models. -- d_i The compiler ignores calls and task activations when they target a -- subprogram or task type defined in an external instance for both -- the static and dynamic elaboration models. -- d_p The compiler ignores calls to subprograms which verify the run-time -- semantics of invariants and postconditions in both the static and -- dynamic elaboration models. -- d_s The compiler stops the examination of a task body once it reaches -- a call to routine Ada.Synchronous_Task_Control.Suspend_Until_True -- or Ada.Synchronous_Barriers.Wait_For_Release. -- d_L Output trace information on elaboration checking. This debug switch -- causes output to be generated showing each call or instantiation as -- it is checked, and the progress of the recursive trace through -- elaboration calls at compile time. -- d1 Error messages have node numbers where possible. Normally error -- messages have only source locations. This option is useful when -- debugging errors caused by expanded code, where the source location -- does not give enough information. -- d2 Suppress output of the error position flags for verbose form error -- messages. The messages are still interspersed in the listing, but -- without any error flags or extra blank lines. Also causes an extra -- <<< to be output at the right margin. This is intended to be the -- easiest format for checking conformance of ACATS B tests. This -- flag also suppresses the additional messages explaining why a -- non-static expression is non-static (see Sem_Eval.Why_Not_Static). -- This avoids having to worry about these messages in ACATS testing. -- d3 Causes Comperr to dump the contents of the node for which an abort -- was detected (normally only the Node_Id of the node is output). -- d4 Inhibits automatic krunching of predefined library unit file names. -- Normally, as described in the spec of package Krunch, such files -- are automatically krunched to 8 characters, with special treatment -- of the prefixes Ada, System, and Interfaces. Setting this debug -- switch disables this special treatment. -- d5 Causes the tree read/write circuit to output detailed information -- tracking the data that is read and written element by element. -- d6 Normally access-to-unconstrained-array types are represented -- using fat (double) pointers. Using this debug flag causes them -- to default to thin. This can be used to test the performance -- implications of using thin pointers, and also to test that the -- compiler functions correctly with this choice. -- d7 Normally a -gnatl or -gnatv listing includes the time stamp of the -- source file and the time of the compilation. This debug flag can -- be used to suppress this output, and also suppresses the message -- with the version of the compiler. This is useful for regression -- tests which need to have consistent output. -- d8 This forces the packed stuff to generate code assuming the -- opposite endianness from the actual correct value. Useful in -- testing out code generation from the packed routines. -- d9 This allows lock free implementation for protected objects -- (see Exp_Ch9). -- d.1 Sets Opt.Unnest_Subprogram_Mode to enable unnesting of subprograms. -- This special pass does not actually unnest things, but it ensures -- that a nested procedure does not contain any uplevel references. -- See spec of Exp_Unst for full details. -- d.2 Allow statements within declarative parts. This is not usually -- allowed, but in some debugging contexts (e.g. testing the circuit -- for unnesting of procedures), it is useful to allow this. -- d.3 Output debugging information from Exp_Unst, including the name of -- any unreachable subprograms that get deleted. -- d.4 By default in case of an error during C generation, the .c or .h -- file is deleted. This flag keeps the C file. -- d.5 By default a subprogram imported generates a subprogram profile. -- This debug flag disables this generation when generating C code, -- assuming a proper #include will be used instead. -- d.6 By default the C back-end avoids declaring types that are not -- referenced by the generated C code. This debug flag restores the -- output of all the types. -- d.7 Indicates (to gnat2scil) that CodePeer is being invoked as a -- prover by the SPARK tools and that therefore gnat2scil should -- avoid SCIL generation strategies which can introduce soundness -- issues (e.g., assuming that a low bound of an array parameter -- of an unconstrained subtype belongs to the index subtype). -- d.9 Enable build-in-place for function calls returning some nonlimited -- types. ------------------------------------------ -- Documentation for Binder Debug Flags -- ------------------------------------------ -- da Normally if there is an elaboration circularity, then in describing -- the cycle, links involving internal units are omitted, since they -- are irrelevant and confusing. This debug flag causes all links to -- be listed, and is useful when diagnosing circularities introduced -- by incorrect changes to the run-time library itself. -- db Output debug information from Better_Choice in Binde, which uses -- various heuristics to determine elaboration order in cases where -- multiple orders are valid. -- dc List units as they are chosen. As units are selected for addition to -- the elaboration order, a line of output is generated showing which -- unit has been selected. -- de Similar to the effect of -e (output complete list of elaboration -- dependencies) except that internal units are included in the -- listing. -- di Normally gnatbind calls Read_Ali with Ignore_Errors set to -- False, since the binder really needs correct version ALI -- files to do its job. This debug flag causes Ignore_Errors -- mode to be set for the binder (and is particularly useful -- for testing ignore errors mode). -- dn List details of manipulation of Num_Pred values during execution of -- the algorithm used to determine a correct order of elaboration. This -- is useful in diagnosing any problems in its behavior. -- do Use older elaboration order preference. The new preference rules -- prefer specs with no bodies to specs with bodies, and between two -- specs with bodies, prefers the one whose body is closer to being -- able to be elaborated. This is a clear improvement, but we provide -- this debug flag in case of regressions. Note: -do is even older -- than -dp. -- dp Use old elaboration order preference. The new preference rules -- elaborate all units within a strongly connected component together, -- with no other units in between. In particular, if a spec/body pair -- can be elaborated together, it will be. In the new order, the binder -- behaves as if every pragma Elaborate_All that would be legal is -- present, even if it does not appear in the source code. -- du List unit name and file name for each unit as it is read in -- dv Verbose debugging printouts -- dx Force the binder to read (and then ignore) the xref information -- in ali files (used to check that read circuit is working OK). -------------------------------------------- -- Documentation for gnatmake Debug Flags -- -------------------------------------------- -- df Only output file names, not path names, in log -- dh Generate listing showing loading of name table hash chains, -- same as for the compiler. -- dm Issue a message indicating the maximum number of simultaneous -- compilations. -- dn Do not delete temporary files created by gnatmake at the end -- of execution, such as temporary config pragma files, mapping -- files or project path files. This debug switch is equivalent to -- the standard switch --keep-temp-files. We retain the debug switch -- for back compatibility with past usage. -- dp Prints the Q used by routine Make.Compile_Sources every time -- we go around the main compile loop of Make.Compile_Sources -- dq Prints source files as they are enqueued and dequeued in the Q -- used by routine Make.Compile_Sources. Useful to figure out the -- order in which sources are recompiled. -- dt When a time stamp mismatch has been found for an ALI file, -- display the source file name, the time stamp expected and -- the time stamp found. -- du List unit name and file name for each unit as it is read in -- dw Prints the list of units withed by the unit currently explored -- during the main loop of Make.Compile_Sources. --------------------------------------------- -- Documentation for gprbuild Debug Flags -- --------------------------------------------- -- dm Display the maximum number of simultaneous compilations. -- dn Do not delete temporary files created by gprbuild at the end -- of execution, such as temporary config pragma files, mapping -- files or project path files. This debug switch is equivalent to -- the standard switch --keep-temp-files. We retain the debug switch -- for back compatibility with past usage. -- dt When a time stamp mismatch has been found for an ALI file, -- display the source file name, the time stamp expected and -- the time stamp found. -------------------- -- Set_Debug_Flag -- -------------------- procedure Set_Debug_Flag (C : Character; Val : Boolean := True) is subtype Dig is Character range '1' .. '9'; subtype LLet is Character range 'a' .. 'z'; subtype ULet is Character range 'A' .. 'Z'; begin if C in Dig then case Dig (C) is when '1' => Debug_Flag_1 := Val; when '2' => Debug_Flag_2 := Val; when '3' => Debug_Flag_3 := Val; when '4' => Debug_Flag_4 := Val; when '5' => Debug_Flag_5 := Val; when '6' => Debug_Flag_6 := Val; when '7' => Debug_Flag_7 := Val; when '8' => Debug_Flag_8 := Val; when '9' => Debug_Flag_9 := Val; end case; elsif C in ULet then case ULet (C) is when 'A' => Debug_Flag_AA := Val; when 'B' => Debug_Flag_BB := Val; when 'C' => Debug_Flag_CC := Val; when 'D' => Debug_Flag_DD := Val; when 'E' => Debug_Flag_EE := Val; when 'F' => Debug_Flag_FF := Val; when 'G' => Debug_Flag_GG := Val; when 'H' => Debug_Flag_HH := Val; when 'I' => Debug_Flag_II := Val; when 'J' => Debug_Flag_JJ := Val; when 'K' => Debug_Flag_KK := Val; when 'L' => Debug_Flag_LL := Val; when 'M' => Debug_Flag_MM := Val; when 'N' => Debug_Flag_NN := Val; when 'O' => Debug_Flag_OO := Val; when 'P' => Debug_Flag_PP := Val; when 'Q' => Debug_Flag_QQ := Val; when 'R' => Debug_Flag_RR := Val; when 'S' => Debug_Flag_SS := Val; when 'T' => Debug_Flag_TT := Val; when 'U' => Debug_Flag_UU := Val; when 'V' => Debug_Flag_VV := Val; when 'W' => Debug_Flag_WW := Val; when 'X' => Debug_Flag_XX := Val; when 'Y' => Debug_Flag_YY := Val; when 'Z' => Debug_Flag_ZZ := Val; end case; else case LLet (C) is when 'a' => Debug_Flag_A := Val; when 'b' => Debug_Flag_B := Val; when 'c' => Debug_Flag_C := Val; when 'd' => Debug_Flag_D := Val; when 'e' => Debug_Flag_E := Val; when 'f' => Debug_Flag_F := Val; when 'g' => Debug_Flag_G := Val; when 'h' => Debug_Flag_H := Val; when 'i' => Debug_Flag_I := Val; when 'j' => Debug_Flag_J := Val; when 'k' => Debug_Flag_K := Val; when 'l' => Debug_Flag_L := Val; when 'm' => Debug_Flag_M := Val; when 'n' => Debug_Flag_N := Val; when 'o' => Debug_Flag_O := Val; when 'p' => Debug_Flag_P := Val; when 'q' => Debug_Flag_Q := Val; when 'r' => Debug_Flag_R := Val; when 's' => Debug_Flag_S := Val; when 't' => Debug_Flag_T := Val; when 'u' => Debug_Flag_U := Val; when 'v' => Debug_Flag_V := Val; when 'w' => Debug_Flag_W := Val; when 'x' => Debug_Flag_X := Val; when 'y' => Debug_Flag_Y := Val; when 'z' => Debug_Flag_Z := Val; end case; end if; end Set_Debug_Flag; --------------------------- -- Set_Dotted_Debug_Flag -- --------------------------- procedure Set_Dotted_Debug_Flag (C : Character; Val : Boolean := True) is subtype Dig is Character range '1' .. '9'; subtype LLet is Character range 'a' .. 'z'; subtype ULet is Character range 'A' .. 'Z'; begin if C in Dig then case Dig (C) is when '1' => Debug_Flag_Dot_1 := Val; when '2' => Debug_Flag_Dot_2 := Val; when '3' => Debug_Flag_Dot_3 := Val; when '4' => Debug_Flag_Dot_4 := Val; when '5' => Debug_Flag_Dot_5 := Val; when '6' => Debug_Flag_Dot_6 := Val; when '7' => Debug_Flag_Dot_7 := Val; when '8' => Debug_Flag_Dot_8 := Val; when '9' => Debug_Flag_Dot_9 := Val; end case; elsif C in ULet then case ULet (C) is when 'A' => Debug_Flag_Dot_AA := Val; when 'B' => Debug_Flag_Dot_BB := Val; when 'C' => Debug_Flag_Dot_CC := Val; when 'D' => Debug_Flag_Dot_DD := Val; when 'E' => Debug_Flag_Dot_EE := Val; when 'F' => Debug_Flag_Dot_FF := Val; when 'G' => Debug_Flag_Dot_GG := Val; when 'H' => Debug_Flag_Dot_HH := Val; when 'I' => Debug_Flag_Dot_II := Val; when 'J' => Debug_Flag_Dot_JJ := Val; when 'K' => Debug_Flag_Dot_KK := Val; when 'L' => Debug_Flag_Dot_LL := Val; when 'M' => Debug_Flag_Dot_MM := Val; when 'N' => Debug_Flag_Dot_NN := Val; when 'O' => Debug_Flag_Dot_OO := Val; when 'P' => Debug_Flag_Dot_PP := Val; when 'Q' => Debug_Flag_Dot_QQ := Val; when 'R' => Debug_Flag_Dot_RR := Val; when 'S' => Debug_Flag_Dot_SS := Val; when 'T' => Debug_Flag_Dot_TT := Val; when 'U' => Debug_Flag_Dot_UU := Val; when 'V' => Debug_Flag_Dot_VV := Val; when 'W' => Debug_Flag_Dot_WW := Val; when 'X' => Debug_Flag_Dot_XX := Val; when 'Y' => Debug_Flag_Dot_YY := Val; when 'Z' => Debug_Flag_Dot_ZZ := Val; end case; else case LLet (C) is when 'a' => Debug_Flag_Dot_A := Val; when 'b' => Debug_Flag_Dot_B := Val; when 'c' => Debug_Flag_Dot_C := Val; when 'd' => Debug_Flag_Dot_D := Val; when 'e' => Debug_Flag_Dot_E := Val; when 'f' => Debug_Flag_Dot_F := Val; when 'g' => Debug_Flag_Dot_G := Val; when 'h' => Debug_Flag_Dot_H := Val; when 'i' => Debug_Flag_Dot_I := Val; when 'j' => Debug_Flag_Dot_J := Val; when 'k' => Debug_Flag_Dot_K := Val; when 'l' => Debug_Flag_Dot_L := Val; when 'm' => Debug_Flag_Dot_M := Val; when 'n' => Debug_Flag_Dot_N := Val; when 'o' => Debug_Flag_Dot_O := Val; when 'p' => Debug_Flag_Dot_P := Val; when 'q' => Debug_Flag_Dot_Q := Val; when 'r' => Debug_Flag_Dot_R := Val; when 's' => Debug_Flag_Dot_S := Val; when 't' => Debug_Flag_Dot_T := Val; when 'u' => Debug_Flag_Dot_U := Val; when 'v' => Debug_Flag_Dot_V := Val; when 'w' => Debug_Flag_Dot_W := Val; when 'x' => Debug_Flag_Dot_X := Val; when 'y' => Debug_Flag_Dot_Y := Val; when 'z' => Debug_Flag_Dot_Z := Val; end case; end if; end Set_Dotted_Debug_Flag; -------------------------------- -- Set_Underscored_Debug_Flag -- -------------------------------- procedure Set_Underscored_Debug_Flag (C : Character; Val : Boolean := True) is subtype Dig is Character range '1' .. '9'; subtype LLet is Character range 'a' .. 'z'; subtype ULet is Character range 'A' .. 'Z'; begin if C in Dig then case Dig (C) is when '1' => Debug_Flag_Underscore_1 := Val; when '2' => Debug_Flag_Underscore_2 := Val; when '3' => Debug_Flag_Underscore_3 := Val; when '4' => Debug_Flag_Underscore_4 := Val; when '5' => Debug_Flag_Underscore_5 := Val; when '6' => Debug_Flag_Underscore_6 := Val; when '7' => Debug_Flag_Underscore_7 := Val; when '8' => Debug_Flag_Underscore_8 := Val; when '9' => Debug_Flag_Underscore_9 := Val; end case; elsif C in ULet then case ULet (C) is when 'A' => Debug_Flag_Underscore_AA := Val; when 'B' => Debug_Flag_Underscore_BB := Val; when 'C' => Debug_Flag_Underscore_CC := Val; when 'D' => Debug_Flag_Underscore_DD := Val; when 'E' => Debug_Flag_Underscore_EE := Val; when 'F' => Debug_Flag_Underscore_FF := Val; when 'G' => Debug_Flag_Underscore_GG := Val; when 'H' => Debug_Flag_Underscore_HH := Val; when 'I' => Debug_Flag_Underscore_II := Val; when 'J' => Debug_Flag_Underscore_JJ := Val; when 'K' => Debug_Flag_Underscore_KK := Val; when 'L' => Debug_Flag_Underscore_LL := Val; when 'M' => Debug_Flag_Underscore_MM := Val; when 'N' => Debug_Flag_Underscore_NN := Val; when 'O' => Debug_Flag_Underscore_OO := Val; when 'P' => Debug_Flag_Underscore_PP := Val; when 'Q' => Debug_Flag_Underscore_QQ := Val; when 'R' => Debug_Flag_Underscore_RR := Val; when 'S' => Debug_Flag_Underscore_SS := Val; when 'T' => Debug_Flag_Underscore_TT := Val; when 'U' => Debug_Flag_Underscore_UU := Val; when 'V' => Debug_Flag_Underscore_VV := Val; when 'W' => Debug_Flag_Underscore_WW := Val; when 'X' => Debug_Flag_Underscore_XX := Val; when 'Y' => Debug_Flag_Underscore_YY := Val; when 'Z' => Debug_Flag_Underscore_ZZ := Val; end case; else case LLet (C) is when 'a' => Debug_Flag_Underscore_A := Val; when 'b' => Debug_Flag_Underscore_B := Val; when 'c' => Debug_Flag_Underscore_C := Val; when 'd' => Debug_Flag_Underscore_D := Val; when 'e' => Debug_Flag_Underscore_E := Val; when 'f' => Debug_Flag_Underscore_F := Val; when 'g' => Debug_Flag_Underscore_G := Val; when 'h' => Debug_Flag_Underscore_H := Val; when 'i' => Debug_Flag_Underscore_I := Val; when 'j' => Debug_Flag_Underscore_J := Val; when 'k' => Debug_Flag_Underscore_K := Val; when 'l' => Debug_Flag_Underscore_L := Val; when 'm' => Debug_Flag_Underscore_M := Val; when 'n' => Debug_Flag_Underscore_N := Val; when 'o' => Debug_Flag_Underscore_O := Val; when 'p' => Debug_Flag_Underscore_P := Val; when 'q' => Debug_Flag_Underscore_Q := Val; when 'r' => Debug_Flag_Underscore_R := Val; when 's' => Debug_Flag_Underscore_S := Val; when 't' => Debug_Flag_Underscore_T := Val; when 'u' => Debug_Flag_Underscore_U := Val; when 'v' => Debug_Flag_Underscore_V := Val; when 'w' => Debug_Flag_Underscore_W := Val; when 'x' => Debug_Flag_Underscore_X := Val; when 'y' => Debug_Flag_Underscore_Y := Val; when 'z' => Debug_Flag_Underscore_Z := Val; end case; end if; end Set_Underscored_Debug_Flag; end Debug;