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fix：修复llvm编译环境下内核态内存调测调用栈信息解析有误的问题 

背景：内核态内存调测调用栈信息在gcc编译环境下是准确的，但是llvm
编译环境下是错误的，分析知，gcc和llvm编译环境下fp和lr的对应关系
是有区别的。
修复：增加llvm编译环境下对lr解析的逻辑，并用编译宏控制。

close #I40TQS

Signed-off-by: Haryslee <lihao189@huawei.com>

Change-Id: If2a7b7a286d91e78dcff2bdeb136fda71e656a79
This commit is contained in:
Haryslee 2021-07-15 19:19:56 +08:00
parent d9ed4b4bf6
commit 9547133e64
1 changed files with 9 additions and 1 deletions
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10
arch/arm/arm/src/los_exc.c
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@ -721,7 +721,7 @@ VOID BackTraceSub(UINTPTR regFP)
while (IsValidFP(backFP, stackStart, stackEnd, &kvaddr) == TRUE) {
tmpFP = backFP;
#ifdef LOSCFG_COMPILER_CLANG_LLVM
backFP = *(UINTPTR *)(UINTPTR)kvaddr;
backFP = *(UINTPTR *)(UINTPTR)kvaddr;
if (IsValidFP(tmpFP + POINTER_SIZE, stackStart, stackEnd, &kvaddr) == FALSE) {
PrintExcInfo("traceback backLR check failed, backLP: 0x%x\n", tmpFP + POINTER_SIZE);
return;
@ -1215,7 +1215,11 @@ VOID LOS_RecordLR(UINTPTR *LR, UINT32 LRSize, UINT32 recordCount, UINT32 jumpCou
framePtr = Get_Fp();
while ((framePtr > stackStart) && (framePtr < stackEnd) && IS_ALIGNED(framePtr, sizeof(CHAR *))) {
tmpFramePtr = framePtr;
#ifdef LOSCFG_COMPILER_CLANG_LLVM
linkReg = *(UINTPTR *)(tmpFramePtr + sizeof(UINTPTR));
#else
linkReg = *(UINTPTR *)framePtr;
#endif
if (index >= jumpCount) {
LR[count++] = linkReg;
if (count == recordCount) {
@ -1223,7 +1227,11 @@ VOID LOS_RecordLR(UINTPTR *LR, UINT32 LRSize, UINT32 recordCount, UINT32 jumpCou
}
}
index++;
#ifdef LOSCFG_COMPILER_CLANG_LLVM
framePtr = *(UINTPTR *)framePtr;
#else
framePtr = *(UINTPTR *)(tmpFramePtr - sizeof(UINTPTR));
#endif
}
/* if linkReg is not enough,clean up the last of the effective LR as the end. */