TA使用内存分析
最近使用这个函数来排除TA中内存泄露问题。
函数：
#ifdef CFG_WITH_STATS
static TEE_Result get_alloc_stat1() { struct malloc_stats stats; malloc_get_stats(&stats); strncpy(stats.desc, "TA Heap", sizeof(stats.desc)); DMSG("Pool: %*s\n", (int)strnlen(stats.desc, sizeof(stats.desc)), stats.desc); DMSG("Bytes allocated: %d\n", stats.allocated); DMSG("Max bytes allocated: %d\n", stats.max_allocated); DMSG("Size of pool: %d\n", stats.size); DMSG("Number of failed allocations: %d\n", stats.num_alloc_fail); DMSG("Size of larges allocation failure: %d\n", stats.biggest_alloc_fail); DMSG("Total bytes allocated at that failure: %d\n", stats.biggest_alloc_fail_used); return TEE_SUCCESS; }
#endif
注意：上述函数需要用宏CFG_WITH_STATS隔开，且TA中需要打开这个宏开关：
diff --git a/ta/Makefile b/ta/Makefile index 1918266..0ee9ac7 100644 --- a/ta/Makefile +++ b/ta/Makefile @@ -1,5 +1,5 @@ CFG_TEE_TA_LOG_LEVEL ?= 3 -CFG_WITH_STATS ?= n +CFG_WITH_STATS ?= y
同时optee os中也要相应地打开这个宏：
src/optee_os diff --git a/core/arch/arm/plat-xxx/conf.mk b/core/arch/arm/plat-xxx/conf.mk index 6250e81..dccdc6e 100644 --- a/core/arch/arm/plat-xxx/conf.mk +++ b/core/arch/arm/plat-xxx/conf.mk @@ -20,6 +20,7 @@ $(call force,CFG_PM_STUBS,y) $(call force,CFG_SECURE_TIME_SOURCE_CNTPCT,y) $(call force,CFG_WITH_ARM_TRUSTED_FW,y) #todo $(call force,CFG_ARM_GICV3,y) +CFG_WITH_STATS ?= y # only build arm64 supported-ta-targets := ta_arm64
示例代码：
这段代码是直接在hello_world中添加的。为了测试该TA中内存情况：
get_alloc_stat1(); uint8_t *test = TEE_Malloc(10, TEE_MALLOC_FILL_ZERO); DMSG("after malloc 10"); get_alloc_stat1(); DMSG("after free"); TEE_Free(test); get_alloc_stat1(); test = TEE_Malloc(30, TEE_MALLOC_FILL_ZERO); DMSG("after malloc 30"); get_alloc_stat1(); DMSG("after free"); TEE_Free(test); get_alloc_stat1(); test = TEE_Malloc(60, TEE_MALLOC_FILL_ZERO); DMSG("after malloc 60"); get_alloc_stat1(); DMSG("after free"); TEE_Free(test); get_alloc_stat1(); test = TEE_Malloc(100, TEE_MALLOC_FILL_ZERO); DMSG("after malloc 100"); get_alloc_stat1(); DMSG("after free"); TEE_Free(test); get_alloc_stat1();
测试结果：
6229 59630.281 D/TA: get_alloc_stat1:182 Pool: TA Heap 6231 59630.292 D/TA: get_alloc_stat1:184 Bytes allocated: 128 //入口打印，还没查这个值是如何来的，待查 6233 59630.305 D/TA: get_alloc_stat1:186 Max bytes allocated: 256 6235 59630.317 D/TA: get_alloc_stat1:188 Size of pool: 32752 6237 59630.330 D/TA: get_alloc_stat1:190 Number of failed allocations: 0 6239 59630.342 D/TA: get_alloc_stat1:192 Size of larges allocation failure: 0 6241 59630.354 D/TA: get_alloc_stat1:194 Total bytes allocated at that failure: 0 6243 59630.366 D/TA: TA_InvokeCommandEntryPoint:225 after malloc 10 //预期分配10个字节 6245 59630.377 D/TA: get_alloc_stat1:182 Pool: TA Heap 6247 59630.388 D/TA: get_alloc_stat1:184 Bytes allocated: 160 //实际分配160-128=32个字节 6249 59630.401 D/TA: get_alloc_stat1:186 Max bytes allocated: 256 6251 59630.413 D/TA: get_alloc_stat1:188 Size of pool: 32752 6253 59630.426 D/TA: get_alloc_stat1:190 Number of failed allocations: 0 6255 59630.438 D/TA: get_alloc_stat1:192 Size of larges allocation failure: 0 6257 59630.450 D/TA: get_alloc_stat1:194 Total bytes allocated at that failure: 0 6259 59630.462 D/TA: TA_InvokeCommandEntryPoint:227 after free 6261 59630.473 D/TA: get_alloc_stat1:182 Pool: TA Heap 6263 59630.484 D/TA: get_alloc_stat1:184 Bytes allocated: 128 //释放之后，变回128 6265 59630.496 D/TA: get_alloc_stat1:186 Max bytes allocated: 256 6267 59630.508 D/TA: get_alloc_stat1:188 Size of pool: 32752 6269 59630.521 D/TA: get_alloc_stat1:190 Number of failed allocations: 0 6271 59630.533 D/TA: get_alloc_stat1:192 Size of larges allocation failure: 0 6273 59630.545 D/TA: get_alloc_stat1:194 Total bytes allocated at that failure: 0 6275 59630.558 D/TA: TA_InvokeCommandEntryPoint:232 after malloc 30 //预期分配30个字节 6277 59630.569 D/TA: get_alloc_stat1:182 Pool: TA Heap 6279 59630.580 D/TA: get_alloc_stat1:184 Bytes allocated: 176 //实际分配176-128=48个字节 6281 59630.592 D/TA: get_alloc_stat1:186 Max bytes allocated: 256 6283 59630.605 D/TA: get_alloc_stat1:188 Size of pool: 32752 6285 59630.617 D/TA: get_alloc_stat1:190 Number of failed allocations: 0 6287 59630.629 D/TA: get_alloc_stat1:192 Size of larges allocation failure: 0 6289 59630.642 D/TA: get_alloc_stat1:194 Total bytes allocated at that failure: 0 6291 59630.654 D/TA: TA_InvokeCommandEntryPoint:234 after free 6293 59630.664 D/TA: get_alloc_stat1:182 Pool: TA Heap 6295 59630.675 D/TA: get_alloc_stat1:184 Bytes allocated: 128 //释放后，变回128 6297 59630.688 D/TA: get_alloc_stat1:186 Max bytes allocated: 256 6299 59630.700 D/TA: get_alloc_stat1:188 Size of pool: 32752 6301 59630.713 D/TA: get_alloc_stat1:190 Number of failed allocations: 0 6303 59630.725 D/TA: get_alloc_stat1:192 Size of larges allocation failure: 0 6305 59630.737 D/TA: get_alloc_stat1:194 Total bytes allocated at that failure: 0 6307 59630.749 D/TA: TA_InvokeCommandEntryPoint:239 after malloc 60 //预期分配60个字节 6309 59630.760 D/TA: get_alloc_stat1:182 Pool: TA Heap 6311 59630.771 D/TA: get_alloc_stat1:184 Bytes allocated: 208 //实际分配208-128=80 6313 59630.784 D/TA: get_alloc_stat1:186 Max bytes allocated: 256 6315 59630.796 D/TA: get_alloc_stat1:188 Size of pool: 32752 6317 59630.809 D/TA: get_alloc_stat1:190 Number of failed allocations: 0 6319 59630.821 D/TA: get_alloc_stat1:192 Size of larges allocation failure: 0 6321 59630.833 D/TA: get_alloc_stat1:194 Total bytes allocated at that failure: 0 6323 59630.845 D/TA: TA_InvokeCommandEntryPoint:241 after free 6325 59630.856 D/TA: get_alloc_stat1:182 Pool: TA Heap 6327 59630.867 D/TA: get_alloc_stat1:184 Bytes allocated: 128 6329 59630.879 D/TA: get_alloc_stat1:186 Max bytes allocated: 256 6331 59630.892 D/TA: get_alloc_stat1:188 Size of pool: 32752 6333 59630.904 D/TA: get_alloc_stat1:190 Number of failed allocations: 0 6335 59630.916 D/TA: get_alloc_stat1:192 Size of larges allocation failure: 0 6337 59630.928 D/TA: get_alloc_stat1:194 Total bytes allocated at that failure: 0 6339 59630.941 D/TA: TA_InvokeCommandEntryPoint:246 after malloc 100 //预期100 6341 59630.952 D/TA: get_alloc_stat1:182 Pool: TA Heap 6343 59630.963 D/TA: get_alloc_stat1:184 Bytes allocated: 256 //实际256-128=128 6345 59630.975 D/TA: get_alloc_stat1:186 Max bytes allocated: 256 6347 59630.988 D/TA: get_alloc_stat1:188 Size of pool: 32752 6349 59631.000 D/TA: get_alloc_stat1:190 Number of failed allocations: 0 6351 59631.012 D/TA: get_alloc_stat1:192 Size of larges allocation failure: 0 6353 59631.025 D/TA: get_alloc_stat1:194 Total bytes allocated at that failure: 0 6355 59631.037 D/TA: TA_InvokeCommandEntryPoint:248 after free 6357 59631.047 D/TA: get_alloc_stat1:182 Pool: TA Heap 6359 59631.058 D/TA: get_alloc_stat1:184 Bytes allocated: 128 6361 59631.071 D/TA: get_alloc_stat1:186 Max bytes allocated: 256 6363 59631.083 D/TA: get_alloc_stat1:188 Size of pool: 32752 6365 59631.096 D/TA: get_alloc_stat1:190 Number of failed allocations: 0 6367 59631.108 D/TA: get_alloc_stat1:192 Size of larges allocation failure: 0 6369 59631.120 D/TA: get_alloc_stat1:194 Total bytes allocated at that failure: 0
从结果来看，是存在对齐操作的。这个方法可以比较方便的用于跟踪打印TA侧是否存在内存泄露情况。
