diff options
Diffstat (limited to 'gdb/infptrace.c')
| -rw-r--r-- | gdb/infptrace.c | 22 |
1 files changed, 20 insertions, 2 deletions
diff --git a/gdb/infptrace.c b/gdb/infptrace.c index 9815e05..c39ca03 100644 --- a/gdb/infptrace.c +++ b/gdb/infptrace.c @@ -480,6 +480,11 @@ store_inferior_registers (int regno) #endif /* !defined (FETCH_INFERIOR_REGISTERS). */ +/* Set an upper limit on alloca. */ +#ifndef GDB_MAX_ALLOCA +#define GDB_MAX_ALLOCA 0x1000 +#endif + #if !defined (CHILD_XFER_MEMORY) /* NOTE! I tried using PTRACE_READDATA, etc., to read and write memory in the NEW_SUN_PTRACE case. It ought to be straightforward. But @@ -506,9 +511,20 @@ child_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len, int write, /* Round ending address up; get number of longwords that makes. */ int count = ((((memaddr + len) - addr) + sizeof (PTRACE_XFER_TYPE) - 1) / sizeof (PTRACE_XFER_TYPE)); + int alloc = count * sizeof (PTRACE_XFER_TYPE); + PTRACE_XFER_TYPE *buffer; + struct cleanup *old_chain = NULL; + /* Allocate buffer of that many longwords. */ - PTRACE_XFER_TYPE *buffer = - (PTRACE_XFER_TYPE *) alloca (count * sizeof (PTRACE_XFER_TYPE)); + if (len < GDB_MAX_ALLOCA) + { + buffer = (PTRACE_XFER_TYPE *) alloca (alloc); + } + else + { + buffer = (PTRACE_XFER_TYPE *) xmalloc (alloc); + old_chain = make_cleanup (xfree, buffer); + } if (write) { @@ -573,6 +589,8 @@ child_xfer_memory (CORE_ADDR memaddr, char *myaddr, int len, int write, len); } + if (old_chain != NULL) + do_cleanups (old_chain); return len; } |