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x86-nat: Add x86_lookup_debug_reg_state.

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This function returns nullptr if debug register state does not yet
exist for a given process rather than creating new state.
This commit is contained in:
John Baldwin 2022-03-22 12:05:43 -07:00
parent 922c2fc18e
commit b1babce7c3
2 changed files with 17 additions and 0 deletions
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12
gdb/x86-nat.c
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@ -46,6 +46,18 @@ struct x86_dr_low_type x86_dr_low;
static std::unordered_map<pid_t,
struct x86_debug_reg_state> x86_debug_process_state;
/* See x86-nat.h. */
struct x86_debug_reg_state *
x86_lookup_debug_reg_state (pid_t pid)
{
auto it = x86_debug_process_state.find (pid);
if (it != x86_debug_process_state.end ())
return &it->second;
return nullptr;
}
/* Get debug registers state for process PID. */
struct x86_debug_reg_state *

5
gdb/x86-nat.h
View File

@ -40,6 +40,11 @@ extern void x86_set_debug_register_length (int len);
extern void x86_cleanup_dregs (void);
/* Return the debug register state for process PID. If no existing
state is found for this process, return nullptr. */
struct x86_debug_reg_state *x86_lookup_debug_reg_state (pid_t pid);
/* Called whenever GDB is no longer debugging process PID. It deletes
data structures that keep track of debug register state. */