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Implement support for a SYS:ENV attribute on executable

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__flatten_process_args() does now have the executable path as an
additional (optional) parameter. If specified, the function will read
the file's SYS:ENV attribute (if set) and use its value to modified the
environment it is preparing for the new process. Currently supported
attribute values are strings consisting of "<var>=<value>" substrings
separated by "\0" (backslash zero), with '\' being used as an escape
character. The environment will be altered to contain the specified
"<var>=<value>" elements, replacing a preexisting <var> element (if
any).

A possible use case would be setting a SYS:ENV attribute with value
"DISABLE_ASLR=1" on an executable that needs ASLR disabled.
This commit is contained in:
Ingo Weinhold
2013-12-01 18:34:07 +01:00
parent 9f1425e2f4
commit e551626f40
7 changed files with 222 additions and 30 deletions
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src/bin/debug/debug_utils.cpp
+3 -3
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@@ -90,15 +90,15 @@ load_program(const char* const* args, int32 argCount, bool traceLoading)
mutableArgs[0] = programPath.c_str();
// count environment variables
int envCount = 0;
int32 envCount = 0;
while (environ[envCount] != NULL)
envCount++;
// flatten the program args and environment
char** flatArgs = NULL;
size_t flatArgsSize;
error = __flatten_process_args(mutableArgs, argCount, environ, envCount,
&flatArgs, &flatArgsSize);
error = __flatten_process_args(mutableArgs, argCount, environ, &envCount,
mutableArgs[0], &flatArgs, &flatArgsSize);
// load the program
thread_id thread;