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Add comments on trailing uint8[1] members in the "Common" structures (#1189)

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Add comments to avoid abusing these members to store extra data.
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YAMAMOTO Takashi 2022-05-26 12:53:50 +09:00 committed by GitHub
parent 3fd763a95c
commit 3168ba8dcf
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1 changed files with 15 additions and 0 deletions
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15
core/iwasm/common/wasm_runtime_common.h
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@ -303,6 +303,11 @@ typedef struct WASMModuleCommon {
Wasm_Module_AoT, and this structure should be treated as
AOTModule structure. */
uint32 module_type;
/* The following uint8[1] member is a dummy just to indicate
some module_type dependent members follow.
Typically it should be accessed by casting to the corresponding
actual module_type dependent structure, not via this member. */
uint8 module_data[1];
} WASMModuleCommon;
@ -314,6 +319,11 @@ typedef struct WASMModuleInstanceCommon {
Wasm_Module_AoT, and this structure should be treated as
AOTModuleInstance structure. */
uint32 module_type;
/* The following uint8[1] member is a dummy just to indicate
some module_type dependent members follow.
Typically it should be accessed by casting to the corresponding
actual module_type dependent structure, not via this member. */
uint8 module_inst_data[1];
} WASMModuleInstanceCommon;
@ -377,6 +387,11 @@ typedef struct WASMRegisteredModule {
typedef struct WASMMemoryInstanceCommon {
uint32 module_type;
/* The following uint8[1] member is a dummy just to indicate
some module_type dependent members follow.
Typically it should be accessed by casting to the corresponding
actual module_type dependent structure, not via this member. */
uint8 memory_inst_data[1];
} WASMMemoryInstanceCommon;