[EXT_EP-9787] Enum type with no enumerators fails to emit DW_AT_byte_size, crashes CCS Created: 04/May/20 Updated: 04/May/20 Resolved: 04/May/20 |
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| Status: | Fixed |
| Project: | Embedded Software & Tools |
| Component/s: | None |
| Affects Version/s: | None |
| Fix Version/s: | None |
| Type: | Bug | Priority: | Medium |
| Reporter: | TI User | Assignee: | TI User |
| Resolution: | Fixed | Votes: | 0 |
| Remaining Estimate: | Not Specified | ||
| Time Spent: | Not Specified | ||
| Original Estimate: | Not Specified | ||
| Product: | CCS Debugger |
| Internal ID: | CCBT-2559 |
| Forum URL: | https://e2e.ti.com/support/tools/ccs/f/81/t/858223 |
| Found In Release: | ARM_18.1.0.LTS MSP430_18.1.0.LTS C6000_8.2.0 C6000_8.3.0 MSP430_20.2.0.LTS ARM_18.12.0.LTS MSP430_18.12.0.LTS ARM_20.2.0.LTS |
| Fix In Release: | ARM_18.12.5.LTS MSP430_20.2.0.LTS ARM_18.1.8.LTS MSP430_18.1.8.LTS C6000_8.3.6 ARM_20.2.0.LTS C6000_8.2.9 MSP430_18.12.5.LTS |
| Affected Platform/Device: | default |
| Workaround: | Add a dummy enumerator to the enum type, like so:
enum e { fake = 0 }; |
| Release Notes: | The test case has an enumeration type with no enumerators. This is not legal in C, but in C++, it is legal to have no enumerators, in which case [C++98 7.2 "Enumeration declarations" p5] "If the enumerator list is empty, the underlying type is as if the enumeration had a single enumerator with value 0." In other words, the enum is a complete type with non-zero size. However, the compiler mistakenly thinks that this enum is incomplete, so it does not emit a DW_AT_byte_size attribute in the DWARF information for the enumeration type. This lack causes CCS to crash when attempting to display a variable declared with that enumeration type. |
| Description |
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Customer observed that CCS9.2 crashed on the test case. CCS5.5 did not crash. It turns out that the C++ test case contains an enumerated type with no enumerators. The compiler thought this type was incomplete and failed to emit a DW_AT_byte_size attribute in the DWARF information. CCS didn't check that this attribute actually exists and crashed. |