View Issue Details
| ID | Project | Category | View Status | Date Submitted | Last Update |
|---|---|---|---|---|---|
| 0038117 | FPC | Compiler | public | 2020-11-23 04:09 | 2020-11-23 04:09 |
| Reporter | Martin Friebe | Assigned To | |||
| Priority | normal | Severity | minor | Reproducibility | always |
| Status | new | Resolution | open | ||
| Platform | Win 32 bit | OS | Win | ||
| Product Version | 3.2.0 | ||||
| Summary | 0038117: line info for not-called procedure always at address 0x0 (dwarf and stabs) | ||||
| Description | See the example code from 0038104 If a function is included (NO smart linking / not smart linkable), but the function is not called, then line info is generated. - For dwarf the line info will be at 0x0 (for each function / so probably not missing relocation, as that would lead to addresses some bytes above 0x0) - For stabs there is also line info, but no function info or address for the function. It appears that the linker (build in, and also -Xe) is removing the code for those functions (at least they do not appear when disassembling, or at least not right after the included procedure (as -al would suggest)). Actually, - for stabs line info is removed, except for the nested procedure (the containing outer procedure's lines are omitted) - for dwarf all line info is kept If the function is removed line info should be removed too. Otherwise it should have a correct address. | ||||
| Steps To Reproduce | The code from issue 0038104 dwarf CU: unit2.pas: File name Line number Starting address unit2.pas 20 0x426180 unit2.pas 21 0x426181 unit2.pas 24 0 // P2 unit2.pas 25 0x1 unit2.pas 33 0 // P3 unit2.pas 34 0x1 unit2.pas 30 0 // P3_1 unit2.pas 31 0x7 stabs 15 FUN 0 19 00424a40 133 P1:F1 16 SOL 0 0 00424a40 139 unit2.pas 17 SLINE 0 20 00000000 0 18 SLINE 0 21 00000001 0 19 LBRAC 0 0 00000000 0 20 RBRAC 0 0 00000003 0 21 RSYM 0 29 00000000 149 parentfp:R2 22 PSYM 0 29 fffffffc 161 parentfp:2 23 SLINE 0 30 00000000 0 24 SLINE 0 31 00000007 0 25 LBRAC 0 0 00000000 0 ==There should also be 22 FUN 0 23 00424a50 149 P2:F1 23 SOL 0 0 00424a50 155 unit2.pas 24 SLINE 0 24 00000000 0 25 SLINE 0 25 00000001 0 and more | ||||
| Additional Information | In the related issue 0038104 GDB only gets the line info wrong, with stabs AND if FPC omits that following lines belong to a new function. With stabs: Adding a function call, and generating proper info, and gdb will stop correctly. With dwarf: stepping is not affected, but disassembling will not show line info for the addresses | ||||
| Tags | No tags attached. | ||||
| Fixed in Revision | |||||
| FPCOldBugId | |||||
| FPCTarget | |||||
| Attached Files |
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| related to | 0038104 | resolved | Martin Friebe | Lazarus | Debugger doesn't work correctly when using local procedures, jumps to a wrong line number in this unit using f7. |
| Date Modified | Username | Field | Change |
|---|---|---|---|
| 2020-11-23 04:09 | Martin Friebe | New Issue | |
| 2020-11-23 04:09 | Martin Friebe | Relationship added | related to 0038104 |
