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GGitHub[lldb] Add frame recognizer for __builtin_verbose_trap (#80368)

8a27ef67创建于 2024年7月16日历史提交

文件	最后提交记录	最后更新时间
assert.c	[lldb/Target] Add Assert StackFrame Recognizer When a thread stops, this checks depending on the platform if the top frame is an abort stack frame. If so, it looks for an assert stack frame in the upper frames and set it as the most relavant frame when found. To do so, the StackFrameRecognizer class holds a "Most Relevant Frame" and a "cooked" stop reason description. When the thread is about to stop, it checks if the current frame is recognized, and if so, it fetches the recognized frame's attributes and applies them. rdar://58528686 Differential Revision: https://reviews.llvm.org/D73303 Signed-off-by: Med Ismail Bennani <medismail.bennani@gmail.com>	6 年前
verbose_trap.cpp	[lldb] Add frame recognizer for __builtin_verbose_trap (#80368) This patch adds a frame recognizer for Clang's __builtin_verbose_trap, which behaves like a __builtin_trap, but emits a failure-reason string into debug-info in order for debuggers to display it to a user. The frame recognizer triggers when we encounter a frame with a function name that begins with __clang_trap_msg, which is the magic prefix Clang emits into debug-info for verbose traps. Once such frame is encountered we display the frame function name as the Stop Reason and display that frame to the user. Example output: `` (lldb) run warning: a.out was compiled with optimization - stepping may behave oddly; variables may not be available. Process 35942 launched: 'a.out' (arm64) Process 35942 stopped * thread #1, queue = 'com.apple.main-thread', stop reason = Misc.: Function is not implemented frame #1: 0x0000000100003fa4 a.outmain [inlined] Dummy::func(this=<unavailable>) at verbose_trap.cpp:3:5 [opt] 1 struct Dummy { 2 void func() { -> 3 __builtin_verbose_trap("Misc.", "Function is not implemented"); 4 } 5 }; 6 7 int main() { (lldb) bt * thread #1, queue = 'com.apple.main-thread', stop reason = Misc.: Function is not implemented frame #0: 0x0000000100003fa4 a.outmain [inlined] __clang_trap_msg$Misc.$Function is not implemented$ at verbose_trap.cpp:0 [opt] * frame #1: 0x0000000100003fa4 a.outmain [inlined] Dummy::func(this=<unavailable>) at verbose_trap.cpp:3:5 [opt] frame #2: 0x0000000100003fa4 a.outmain at verbose_trap.cpp:8:13 [opt] frame #3: 0x0000000189d518b4 dyldstart + 1988 ```	2 年前