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Preserve execution memory for debug instance (#1072)

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During debugging, the debug client may request to malloc a memory space
to evaluate the user expressions. If we malloc memory from the linear memory,
it may fail when the thread is in stop status. We preserve a buffer during
creating debug instance, and use a simple bump pointer allocator to serve lldb's
memory request.
This commit is contained in:
Xu Jun
2022-04-04 08:23:55 +08:00
committed by GitHub
parent f0dc6a3015
commit 24afd4e7cb
3 changed files with 63 additions and 18 deletions
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11
core/iwasm/libraries/debug-engine/debug_engine.h
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@ -44,6 +44,12 @@ typedef enum debug_state_t {
APP_STOPPED
} debug_state_t;
typedef struct WASMDebugExecutionMemory {
uint32 start_offset;
uint32 size;
uint32 current_pos;
} WASMDebugExecutionMemory;
typedef struct WASMDebugInstance {
struct WASMDebugInstance *next;
WASMDebugControlThread *control_thread;
@ -60,6 +66,11 @@ typedef struct WASMDebugInstance {
* RUNNING when receiving STEP/CONTINUE commands, and set to
* STOPPED when any thread stopped */
volatile debug_state_t current_state;
/* Execution memory info. During debugging, the debug client may request to
* malloc a memory space to evaluate user expressions. We preserve a buffer
* during creating debug instance, and use a simple bump pointer allocator
* to serve lldb's memory request */
WASMDebugExecutionMemory exec_mem_info;
} WASMDebugInstance;
typedef enum WASMDebugEventKind {